tft lcd ips vs ltps lcd pricelist

Samsung came up with its unique 18:5:9 AMOLED display for the Galaxy S8. LG picked up its old trusted IPS LCD unit for the G6’s display. These display units have been familiar to the usual Indian smartphone buyer. Honor, on the other hand, has just unveiled the new Honor 8 Pro for the Indian market that ships with an LTPS LCD display. This has led to wonder how exactly is this technology different from the existing ones and what benefits does it give Honor to craft its flagship smartphone with. Well, let’s find out.

The LCD technology brought in the era of thin displays to screens, making the smartphone possible in the current world. LCD displays are power efficient and work on the principle of blocking light. The liquid crystal in the display unit uses some kind of a backlight, generally a LED backlight or a reflector, to make the picture visible to the viewer. There are two kinds of LCD units – passive matrix LCD that requires more power and the superior active matrix LCD unit, known to people as Thin Film Transistor (TFT) that draws less power.

The early LCD technology couldn’t maintain the colour for wide angle viewing, which led to the development of the In-Plane Switching (IPS) LCD panel. IPS panel arranges and switches the orientation of the liquid crystal molecules of standard LCD display between the glass substrates. This helps it to enhance viewing angles and improve colour reproduction as well. IPS LCD technology is responsible for accelerating the growth of the smartphone market and is the go-to display technology for prominent manufacturers.

The standard LCD display uses amorphous Silicon as the liquid for the display unit as it can be assembled into complex high-current driver circuits. This though restricts the display resolution and adds to overall device temperatures. Therefore, development of the technology led to replacing the amorphous Silicon with Polycrystalline Silicon, which boosted the screen resolution and maintains low temperatures. The larger and more uniform grains of polysilicon allow faster electron movement, resulting in higher resolution and higher refresh rates. It also was found to be cheaper to manufacture due to lower cost of certain key substrates. Therefore, the Low-Temperature PolySilicon (LTPS) LCD screen helps provide larger pixel densities, lower power consumption that standard LCD and controlled temperature ranges.

The AMOLED display technology is in a completely different league. It doesn’t bother with any liquid mechanism or complex grid structures. The panel uses an array of tiny LEDs placed on TFT modules. These LEDs have an organic construction that directly emits light and minimises its loss by eradicating certain filters. Since LEDs are physically different units, they can be asked to switch on and off as per the requirement of the display to form a picture. This is known as the Active Matrix system. Hence, an Active Matrix Organic Light Emitting Diode (AMOLED) display can produce deeper blacks by switching off individual LED pixels, resulting in high contrast pictures.

The honest answer is that it depends on the requirement of the user. If you want accurate colours from your display while wanting it to retain its vibrancy for a longer period of time, then any of the two LCD screens are the ideal choice. LTPS LCD display can provide higher picture resolution but deteriorates faster than standard IPS LCD display over time.

An AMOLED display will provide high contrast pictures any time but it too has the tendency to deteriorate faster than LCD panels. Therefore, if you are after greater picture quality, choose LTPS LCD or else settle for AMOLED for a vivid contrast picture experience.

tft lcd ips vs ltps lcd pricelist

According to LCD (Liquid Crystal Display) technology and LCD materials, mobile phone LCD assemblies can be classified into 2 types: TFT (Thin Flim Transistor) and OLED(Organic Light-Emitting Diode). TFT display needs with backlight, but OLED is light-emitting, each pixel is creating its own light.

For Original iPhone LCD, 5-8 plus and Xr, 11 is TFT, X-13 Pro Max is OLED (except XR and 11). But in mobile phone aftermarket, there are too many different types and different qualities, which makes customers confused.

What is in-cell? What is OGS or " with TP"? What is COF? What is COG? What is OEM? What is FOG? What is Original Change Glass? What is IPS? What is LTPS? What is a-Si?

HTPS with small size, high precision, and high contrast. Most used in magnified display products. Such as projectors, projection TVs, etc. And cannot be used as a mobile phone display, so we don"t talk about it here.

IGZO has 20–50 times the electron mobility than a-Sin. IGZO only has been licensed to Samsung Electronics and Sharp. However, it was Sharp who first implemented IGZO into their smartphones (Aquos Phone Zeta SH-02E), tablets, and 32-inch LCDs. IGZO for mobile phones is only Sharp. Almost all mobile phones on the market didn"t use IGZO.

Because the electrons deflect the liquid crystal molecules through the transistor. Electron mobility fundamentally determines the refresh rates of the TFT device. The smaller mobility, the slower transmission of holes and electrons, and the slower response rate. Can"t physically support high refresh rates.

In order to improve the response performance, can increase transistor size to enhance the migration, but this will lead to the extra TFT device that will occupy the display area pixel area. Therefore, the larger unit transistor area, the single-pixel occupy area is smaller(Pixel Aperture Ratio ), resulting in lower brightness.

As we can see electron mobility of a-Si is very low (0.5-1cm2/Vs). But LTPS can deliver a hundred times the mobility than a-Si, and a much higher aperture ratio and PPI is much higher than a-Si resolution.

Compared with LTPS,a-si TFT have those "weakness":a-Si with so much low resolution and low definition. a-Si is 720*1280 with a very blurred display effect.

a-Si with so much bad display performance, but why are there still so many manufacturers producing phone LCDs with a-Si, or why do the customers willing to use a-Si LCD for their phone?

LCDs business has too much competition and wholesalers want to make more profit, they keep pushing suppliers to make LCDs at lower prices. So some of the suppliers start to produce aftermarket phone displays with a-Si to match customers" lower price requirements.

The customers with asymmetric information. End-Users don"t know how to distinguish LCDs qualities. Some of them just chase the price but not quality. That is another reason wholesalers want a lower price.

Now in the market a-Si LCDs for iPhone is TFT with TP but not in-cell. Our ZY a-Si will be in-cell not just TFT with TP. ZY a-Si incell for Xr and 11 ready now, please to get more details.

For more details or questions about in-cell and TFT with TP or about phone LCD display. Please click here to get more information, or Long press and scran the QR code to add me.

tft lcd ips vs ltps lcd pricelist

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tft lcd ips vs ltps lcd pricelist

In recent years, with the development of full-screen mobile phones, In-cell LCD screens have gradually been applied to various mobile phone brands. In the In-cell LCD screen assembly, In-cell screens of LTPS In-cell LCD, IPS In-cell LCD, and Retina In-cell LCD have gradually appeared. Let me introduce the characteristics of the three In-cell LCD screens.

LTPS (Low-Temperature Poly-silicon) is a type of polysilicon, which means that the arrangement of molecular structure in a crystal grain is neat and directional, so the electron mobility rate is faster than that of disordered amorphous silicon. Because of the slow electron movement rate of the amorphous silicon a-si, the drive circuit (gate scanning circuit, data circuit) of the panel can only be done on the IC (voltage -10V~15V), and because LTPS has fast electron movement, Therefore, he built the driving circuit (L/S amplifier circuit in the gate direction, switch circuit in the data direction) around the glass substrate, so he only needs to buy low-voltage IC chips (which are cheaper). When LTPS In-cell LCD is applied to the mobile phone screen assembly, it has the features of ultra-thin, lightweight, fast response speed, high resolution, and low power consumption.

IPS screen (In-Plane Switching, plane switching) technology is a liquid crystal panel technology launched by Hitachi in 2001, commonly known as "Super TFT". IPS screen is a technology based on TFT, and its essence is TFT screen. IPS is a film with a layer of resin attached to the surface. The advantage of the IPS screen is that it is oriented into an opaque mode. The electrode with the vertical orientation of the liquid crystal molecules determines how much light is transmitted. The higher the voltage, the more molecules are twisted.

IPS is mainly used on hard screens. The reason why IPS hard screens have a clear and ultra-stable dynamic display effect depends on its innovative horizontal conversion molecular arrangement, which changes the vertical molecular arrangement of VA soft screens, thus having a more robust and stable liquid crystal structure. The reason why it is called an IPS hard screen is to add a hard protective film to the LCD panel to prevent the LCD screen from being damaged by external hard objects. IPS In-cell LCD has fast response speed, large viewing angle, vivid and saturated display color, and stable dynamic high-definition display.

Retina display is also called retina screen, Retina is actually the name of display technology. This technology compresses more pixels onto a single screen to achieve a delicate screen with amazing resolution. Although the resolution of the screen generally appears in the format of "number of pixels x number of pixels", it is the pixel density, that is, PPI, not the number of pixels, that really determines the screen resolution. In addition, in addition to PPI, the distance between the eyes and the screen also determines whether a screen is clear enough to be called "Retina". For smartphones, 326 PPI can be called Retina display. Retina In-cell LCD uses the same technology as LTPS In-cell LCD, but Retina screens have more advantages in PPI.

tft lcd ips vs ltps lcd pricelist

LCD (Liquid Crystal Display) is a type of flat panel display which uses liquid crystals in its primary form of operation. LEDs have a large and varying set of use cases for consumers and businesses, as they can be commonly found in smartphones, televisions, computer monitors and instrument panels.

LCDs were a big leap in terms of the technology they replaced, which include light-emitting diode (LED) and gas-plasma displays. LCDs allowed displays to be much thinner than cathode ray tube (CRT) technology. LCDs consume much less power than LED and gas-display displays because they work on the principle of blocking light rather than emitting it. Where an LED emits light, the liquid crystals in an LCD produces an image using a backlight.

The way a pixel is controlled is different in each type of display; CRT, LED, LCD and newer types of displays all control pixels differently. In short, LCDs are lit by a backlight, and pixels are switched on and off electronically while using liquid crystals to rotate polarized light. A polarizing glass filter is placed in front and behind all the pixels, the front filter is placed at 90 degrees. In between both filters are the liquid crystals, which can be electronically switched on and off.

LCDs are made with either a passive matrix or an active matrix display grid. The active matrix LCD is also known as a thin film transistor (TFT) display. The passive matrix LCD has a grid of conductors with pixels located at each intersection in the grid. A current is sent across two conductors on the grid to control the light for any pixel. An active matrix has a transistor located at each pixel intersection, requiring less current to control the luminance of a pixel. For this reason, the current in an active matrix display can be switched on and off more frequently, improving the screen refresh time.

Some passive matrix LCD’s have dual scanning, meaning that they scan the grid twice with current in the same time that it took for one scan in the original technology. However, active matrix is still a superior technology out of the two.

LCDs are now being outpaced by other display technologies, but are not completely left in the past. Steadily, LCDs have been being replaced by OLEDs, or organic light-emitting diodes.

OLEDs use a single glass or plastic panels, compared to LCDs which use two. Because an OLED does not need a backlight like an LCD, OLED devices such as televisions are typically much thinner, and have much deeper blacks, as each pixel in an OLED display is individually lit. If the display is mostly black in an LCD screen, but only a small portion needs to be lit, the whole back panel is still lit, leading to light leakage on the front of the display. An OLED screen avoids this, along with having better contrast and viewing angles and less power consumption. With a plastic panel, an OLED display can be bent and folded over itself and still operate. This can be seen in smartphones, such as the controversial Galaxy Fold; or in the iPhone X, which will bend the bottom of the display over itself so the display’s ribbon cable can reach in towards the phone, eliminating the need for a bottom bezel.

QLED stands for quantum light-emitting diode and quantum dot LED. QLED displays were developed by Samsung and can be found in newer televisions. QLEDs work most similarly to LCDs, and can still be considered as a type of LCD. QLEDs add a layer of quantum dot film to an LCD, which increases the color and brightness dramatically compared to other LCDs. The quantum dot film is made up of small crystal semi-conductor particles. The crystal semi-conductor particles can be controlled for their color output.

An LCD or liquid crystal display is a type of flat panel display commonly used in digital devices, for example, digital clocks, appliance displays, and portable computers.

A simple monochrome LCD display has two sheets of polarizing material with a liquid crystal solution sandwiched between them. Electricity is applied to the solution and causes the crystals to align in patterns. Each crystal, therefore, is either opaque or transparent, forming the numbers or text that we can read.

According to the IEEE, “Between 1964 and 1968, at the RCA David Sarnoff Research Center in Princeton, New Jersey, a team of engineers and scientists led by George Heilmeier with Louis Zanoni and Lucian Barton, devised a method for electronic control of light reflected from liquid crystals and demonstrated the first liquid crystal display. Their work launched a global industry that now produces millions of LCDs.”

In 1972, the International Liquid Crystal Company (ILIXCO) owned by James Fergason produced the first modern LCD watch based on James Fergason’s patent.

A liquid crystal display (LCD) has liquid crystal material sandwiched between two sheets of glass. Without any voltage applied between transparent electrodes, liquid crystal molecules are aligned in parallel with the glass surface. When voltage is applied, they change their direction and they turn vertical to the glass surface. They vary in optical characteristics, depending on their orientation. Therefore, the quantity of light transmission can be controlled by combining the motion of liquid crystal molecules and the direction of polarization of two polarizing plates attached to the both outer sides of the glass sheets. LCDs utilize these characteristics to display images.

An LCD consists of many pixels. A pixel consists of three sub-pixels (Red/Green/Blue, RGB). In the case of Full-HD resolution, which is widely used for smartphones, there are more than six million (1,080 x 1,920 x 3 = 6,220,800) sub-pixels. To activate these millions of sub-pixels a TFT is required in each sub-pixel. TFT is an abbreviation for “Thin Film Transistor”. A TFT is a kind of semiconductor device. It serves as a control valve to provide an appropriate voltage onto liquid crystals for individual sub-pixels. A TFT LCD has a liquid crystal layer between a glass substrate formed with TFTs and transparent pixel electrodes and another glass substrate with a color filter (RGB) and transparent counter electrodes. In addition, polarizers are placed on the outer side of each glass substrate and a backlight source on the back side. A change in voltage applied to liquid crystals changes the transmittance of the panel including the two polarizing plates, and thus changes the quantity of light that passes from the backlight to the front surface of the display. This principle allows the TFT LCD to produce full-color images.

In LCD technology, the thermotropic nematic phase is by far the most significant phase. It is formed from rod-shaped (calamitic) molecules that arrange themselves approximately parallel to each other. These molecules can also form smectic phases, which exist in multiple manifestations. Smectic phases are more ordered than nematic phases: as well as the parallel alignment of the molecules, they also form layers.

Low-temperature polycrystalline silicon (or LTPS) LCD—also called LTPS TFT LCD—is a new-generation technology product derived from polycrystalline silicon materials. Polycrystalline silicon is synthesised at relatively low temperatures (~650°C and lower) as compared to traditional methods (above 900°C).

Standard LCDs found in many consumer electronics, including cellphones, use amorphous silicon as the liquid for the display unit. Recent technology has replaced this with polycrystalline silicon, which has boosted the screen resolution and response time of devices.

Row/column driver electronics are integrated onto the glass substrate. The number of components in an LTPS LCD module can be reduced by 40 per cent, while the connection part can be reduced by 95 per cent. The LTPS display screen is better in terms of energy consumption and durability, too.

LTPS LCDs are increasingly becoming popular these days. These have a high potential for large-scale production of electronic devices such as flat-panel LCD displays or image sensors.

LCD or AMOLED, 1080p vs 2K? There are plenty of contentious topics when it comes to smartphone displays, which all have an impact on the day to day usage of our smartphones. However, one important topic which is often overlooked during analysis and discussion is the type of backplane technology used in the display.

Display makers often throw around terms like A-Si, IGZO, or LTPS. But what do these acronyms actually mean and what’s the impact of backplane technology on user experience? What about future developments?

Examples of backplane technology include amorphous silicon (aSi), low-temperature polycrystalline silicon (LTPS) and indium gallium zinc oxide (IGZO), whilst LCD and OLED are examples of light emitting material types. Some of the different backplane technologies can be used with different display types, so IGZO can be used with either LCD or OLED displays, albeit that some backplanes are more suitable than others.

AMOLED puts more electrical stress on the transistors compared with LCD, and therefore favours technologies that can offer more current to each pixel. Also, AMOLED pixel transistors take up more space compared with LCDs, blocking more light emissions for AMOLED displays, making a-Si rather unsuitable. As a result, new technologies and manufacturing processes have been developed to meet the increasing demands made of display panels over recent years.

LTPS currently sits as the high-bar of backplane manufacturing, and can be spotted behind most of the high end LCD and AMOLED displays found in today’s smartphones. It is based on a similar technology to a-Si, but a higher process temperature is used to manufacture LTPS, resulting in a material with improved electrical properties.

LTPS is in fact the only technology that really works for AMOLED right now, due to the higher amount of current required by this type of display technology. LTPS also has higher electron mobility, which, as the name suggests, is an indication of how quickly/easily an electron can move through the transistor, with up to 100 times greater mobility than a-Si.

For starters, this allows for much faster switching display panels. The other big benefit of this high mobility is that the transistor size can be shrunk down, whilst still providing the necessary power for most displays. This reduced size can either be put towards energy efficiencies and reduced power consumption, or can be used to squeeze more transistors in side by side, allow for much greater resolution displays. Both of these aspects are becoming increasingly important as smartphones begin to move beyond 1080p, meaning that LTPS is likely to remain a key technology for the foreseeable future.

The drawback of LTPS TFT comes from its increasingly complicated manufacturing process and material costs, which makes the technology more expensive to produce, especially as resolutions continue to increase. As an example, a 1080p LCD based on this technology panel costs roughly 14 percent more than a-Si TFT LCD. However, LTPS’s enhanced qualities still mean that it remains the preferred technology for higher resolution displays.

Currently, a-Si and LTPS LCD displays make up the largest combined percentage of the smartphone display market. However, IGZO is anticipated as the next technology of choice for mobile displays. Sharp originally began production of its IGZO-TFT LCD panels back in 2012, and has been employing its design in smartphones, tablets and TVs since then. The company has also recent shown off examples of non-rectangular shaped displays based on IGZO. Sharp isn’t the only player in this field — LG and Samsung are both interested in the technology as well.

The area where IGZO, and other technologies, have often struggled is when it comes to implementations with OLED. ASi has proven rather unsuitable to drive OLED displays, with LTPS providing good performance, but at increasing expense as display size and pixel densities increase. The OLED industry is on the hunt for a technology which combines the low cost and scalability of a-Si with the high performance and stability of LTPS, which is where IGZO comes in.

Why should the industry make the switch over to IGZO? Well, the technology has quite a lot of potential, especially for mobile devices. IGZO’s build materials allow for a decent level of electron mobility, offering 20 to 50 times the electron mobility of amorphous silicon (a-Si), although this isn’t quite as high as LTPS, which leaves you with quite a few design possibilities. IGZO displays can therefore by shrunk down to smaller transistor sizes, resulting in lower power consumption, which provides the added benefit of making the IGZO layer less visible than other types. That means you can run the display at a lower brightness to achieve the same output, reducing power consumption in the process.

One of IGZO’s other benefits is that it is highly scalable, allowing for much higher resolution displays with greatly increased pixel densities. Sharp has already announced plans for panels with 600 pixels per inch. This can be accomplished more easily than with a-Si TFT types due to the smaller transistor size.

Essentially, IGZO strives to reach the performance benefits of LTPS, whilst keeping fabrications costs as low as possible. LG and Sharp are both working on improving their manufacturing yields this year, with LG aiming for 70% with its new Gen 8 M2 fab. Combined with energy efficient display technologies like OLED, IGZO should be able to offer an excellent balance of cost, energy efficiency, and display quality for mobile devices.

This developing technology can be manufacturing on a process that leverages a-Si TFT production equipment, which should keep costs down when it comes to switching production, whilst also offering a 40 percent lower cost of production compared with a-Si. AMNR is also touting better optical performance than a-Si and a complete lack of sensitivity to light, unlike IGZO. AMNR could end up offering a new cost effective option for mobile displays, while making improvements in power consumption too.

CBRITE, on the other hand, is working on its own metal oxide TFT, which has a material and process that delivers greater carrier mobility than IGZO. Electron mobility can happily reach 30cm²/V·sec, around the speed of IGZO, and has been demonstrated reaching 80cm²/V·sec, which is almost as high as LTPS. CBRITE also appears to lend itself nicely to the higher resolution and lower power consumption requirements of future mobile display technologies.

Cathode ray tube television sets have long had their day. Flat screen TVs now provide energy-efficient, low-emission entertainment in three out of four German households, according to the Federal Statistical Office. And this figure is rising, Germans are estimated to have purchased eight million flat screen television sets in 2015, most of which are LCDs. LCD technology is also the basis for many other contemporary communication devices, including smartphones, laptops and tablets. After all, with experts forecasting six percent global annual sales growth for flat-panel displays until 2020.

LCD stands for liquid crystal display. Liquid crystals form the basis for billions of flat-panel displays. The American, George H. Heilmeier, unveiled the first monochrome LCD monitor to the expert community in 1968. Commercialization of the first color monitors took another 20 years. Flat screen TVs started sweeping the world in the 1990s, mainly because of the availability of high-performance color filter materials.

“A good rule of thumb is: The smaller and more regular the crystals, the lower the scattering and the better the LCD image quality,” de Keyzer said. Researchers control the process mainly by managing the conditions in which pigment crystallization takes place. The underlying molecular structure is what determines which parts of the color spectrum are filtered out.

Color images on liquid crystal displays (LCDs) used in LCD televisions, computers and smartphones are produced using the three primary colors of light—red (R), green (G) and blue (B). These colors are created using pigments. LCDs produce images by transmitting light emitted from a backlight lamp through a color filter to which an RGB pattern has been applied. As a consequence, the pigments used in the color filter are crucial to picture quality.

With Japan’s shift to digital terrestrial television driving up demand for flatpanel LCD televisions and the popularity of smartphones increasing, in 2007 DIC launched the G58 series of green pigments, which achieved a remarkable increase in brightness. The series includes FASTOGEN GREEN A350, a green pigment characterized by outstanding brightness and contrast that ensures excellent picture quality even with little light from the backlight. In fiscal year 2014, DIC developed the G59 series of green pigments for wide color gamut color filters, which deliver superior brightness and color reproduction, making them suitable for use in filters for next-generation high-definition displays, including those for ultra-high-definition (UHD) televisions. DIC currently enjoys an 85%- plus share of the global market for green pigments for color filters, making its products the de facto standard. DIC also manufactures blue pigments for color filters. In 2012, the Company developed the A series, which boasts a superb balance between brightness and contrast. The optical properties of pigments in this series have earned high marks from smartphone manufacturers and boosted DIC’s share of the global market for blue pigments to approximately 50%.

DIC’s pigments for color filters, which satisfy the diverse performance requirements of displays used in LCD televisions, smartphones, tablets and notebook computers while at the same time adding value, have been adopted for use by many color filter manufacturers. In addition to improving picture quality, these pigments reduce energy consumption and, by extension, lower emissions of CO2. Having positioned pigments for color filters as a business that it expects to drive growth, DIC continues working to reinforce its development and product supply capabilities.

DIC first succeeded in developing offset printing inks in-house in 1915 and 10 years later began production of organic pigments for its own use. Over subsequent years, the Company amassed development and design capabilities, as well as production technologies, crucial to the manufacture of fine chemicals and in 1973 commercialized revolutionary high-performance, long-lasting nematic LCs, which were adopted by Sharp Corporation for use in the world’s first pocket calculator incorporating an LCD. DIC’s passion and development prowess are also evident in its pigments for color filters.

Large-screen LCD televisions are expected to deliver superbly realistic and accurate color reproduction. The small LCDs used in smartphones and other devices must be clear, easy to read and bright enough to ensure legibility even with less light. This is because reduced light requirements results in longer battery life. Increasing brightness requires making color filters thinner and more transparent, but this alone will not deliver vivid colors and resolution. With the question of how best to realize both high brightness and vivid colors on ongoing challenge for display manufacturers, DIC has responded by developing innovative pigments for this application.

The value chain extending from functional pigments through to color filters for LCDs encompasses manufacturers of pigments, pigment dispersions, resist inks, color filters and LCDs. In developing pigments for color filters, we gather information on the latest trends from LCD manufacturers, which we apply to the formulation of nextgeneration product strategies.

Production of pigment dispersions, color filters and LCDs is concentrated primarily in East Asia. Recent years have seen a particularly sharp increase in the People’s Republic of China (PRC), which is on the verge of overtaking the Republic of Korea (ROK) as No. 1 in terms of volume produced. We are making full use of the DIC Group’s global network by working closely with local Group companies to bolster the adoption of DIC pigments for color filters for use in LCDs.

Color filter (CF, COLOR FILTER) is one of the most important components of a color liquid crystal display, which directly determines the quality of the color image of the display. The rapid growth of LCD displays is supported by the strong demand for flat-panel color displays from notebooks (PCs, Personal Computers). The portable characteristics of the LCD, such as small outline size, thinness, lightness, high definition, and low power consumption, greatly meet the needs of notebook PCs. It is believed that in the multimedia age, TFT-LCD will have a huge advantage. Color filters are the key elements that make up a color image.

In particular, the spectral absorption characteristics of CI Pigment Blue 15: 6 and CI Pigment Green 36 are well matched with the wavelengths and emission intensities of the blue, green, and red fluorescence emission spectra (fluorescence lamp for LCD backlight) in liquid crystal displays. In order to further improve the spectral characteristics, it is possible to adjust by adding a small amount of pigments of other colors, such as adding CI Pigment Violet 23 to obtain a stronger red light blue, and adding CI Pigment Yellow 150 to obtain a stronger yellow light green.

The liquid crystal display (LCD)is a thin, flat display device, which is made up of many number of color or monochrome pixels arrayed in front of a light source or reflector. It is prized for its superb image quality, such as low-voltage power source, low manufacturing cost, compared with other display device including CRT, plasma, projection, etc. Today the LCD device has been widely used in portable electronics such as cell phones, personal computers, medium and also in large size television display.

The LCD device consists of two major components, TFT-LCD panel and Back Light Unit (BLU). As LCD device can not light actively itself, thus a form of illumination, back light unit is needed for its display. While one of the key parts in LCD panel is color filter. The color filter is a film frame consists of RGB primary colors, and its function is to generate three basic colors from the back light source for LCD display. As a whole, back light and color filter are the two vital components of the perfect color display for LCD device.

Traditionally people use the cold cathode fluorescent lamp (CCFL)as the back light source for medium and large size LCD device. However CCFL has several disadvantages. For example, narrow color representation, low efficiency, complex structure, limited life, and the CCFL needs to be driven by a high-voltage inverter, consequently requires more space. Another disadvantage is the environmental problem for the mercury inside it. So people try to find an ideal back light module for LCD display.

Nowadays, the back light technology for LCD device towards the trend of using light emitting devices (LED). For its excellent advantages, the LCD device based on LED back light owns promoted display performance. As a new generation of solid-state light source, LED can produce very narrow spectrum, thus can generate a high color saturation, as a result it provides LCD device delivering a wider color gamut of above 100% of NTSC specification than the only 70% of CCFL back light. Moreover the LED only need DC power drive instead of a DC-AC inverter, so simplifies the back light structure. In a word, LED back light makes LCD obtain quite a higher display quality than the conventional CCFL back light. Despite of these advantages, there are also several challenges for LED back light technology currently, such as efficiency, stable ability, heat dissipation and cost etc. so people are trying to get some substantial breakthrough at the technical problems above to make LED back light as the key technology part for LCD device.

Color filter is another key component of the LCD device. As a sophisticated part, its fabrication takes an extremely complicated process, consequently the color filter occupies quite a large proportion of the production cost of the LCD devices. While a serious deficiency is its greatly influence on the light utilization rate. Generally speaking, only about 30% the amount of the light emitted from the back light can be delivered, while the rest of the light is wasted while passing the color filter.

For this, people prefer to designing a new form of LCD module which can get rid of the color filter, to promote the efficiency of light utilization. So an idea of Color Filter-Less (CFL) technology was put forward. The Field Sequential color LCD designed by Sumsang company is the first form of Color Filter-Less technology which is an idea of changing the space color mixing into the time color mixing.

Especially, we design a film frame which is patterned of red and green emitting phosphors, then make it be excited by blue light from a blue LED panel we fabricated. For its special emitting mechanism, this phosphor film can generate red and green emissions respectively. Meanwhile not all the blue light is absorbed by the phosphors, the remnant blue light can pass the film frame, therefore we can achieve a panel frame on which the RGB colors mixed together, thus to replace of the color filter in LCD device.

Organic Light-Emitting Diodes (OLEDs) are most famously known for their use in foldable smart phone displays. From the Samsung Galaxy Fold to the Huawei Mate X (2019), these devices offer huge screens that can fold down to the size of a more traditional smartphone screen. This revolutionary new technology is made possible by the properties and composition of OLED screens. In traditional Liquid Crystal Display (LCD) screens, a glass pane covers the actual liquid crystal display that emits the light. On the other hand, OLED screens have the light emitting technology already built into them. Thus, when you touch interact with an OLED device, you are touching the actual display too. OLED screens are often made of a type of plastic, which allows for flexibility and folding screens. These devices also require OLED color patterning techniques in order to integrate color into the display devices, which we will describe further in the upcoming sections.

Another big part of OLED manufacturing is the color patterning step, which allows the OLED device to display color. There are various methods in use for OLED color patterning, including photolithography. Lithography is commonly used for semiconductors and TFTs, but presents challenges for OLEDs. This is due to the high temperature and humid conditions required for attaching OLED layers together. In this article we will explore three different color patterning technologies that have arisen for more efficient and accurate OLED optical manufacturing.

Mini-LED, on the other hand, improves on the existing LCDs by replacing their LED backlights with mini-LED backlights, which consist of more efficient and numerous light-emitting diodes that will increase contrast ratio, uniformity, response time, etc.

Mini-LED displays will be cheaper than OLEDs, but not better than them. So, Mini-LED is sort of a display technology in-between the standard LED-backlight LCDs and OLED displays.

OLED screen manufacturing has been somewhat costly to date, limiting its adoption primarily to smaller screen sizes like smart phones. Likewise, producing an entire television screen out of microLED chips has so far proven to be challenging. MicroLEDs require new assembly technologies, die structure, and manufacturing infrastructure. For commercialization, fabricators must find methods that yield high quality with microscopic accuracy while also achieving mass-production speeds. For starters, a miniLED backlight screen may be made up of thousands of individual miniLED units; a microLED screen is composed of millions of tiny LEDs.

By contrast, miniLED chips do not present similar production complications. Because they are just smaller versions of traditional LEDs, they can be manufactured in existing fabrication facilities with minimal reconfiguration. This ease means miniLED production is already underway and devices will reach the market this year for applications in gaming displays and signage, followed by backlight products such as smartphones, TVs, virtual reality devices, and automotive displays.

For example, miniLEDs can be used to upgrade existing LCD displays with “ultra-thin, multi-zone local dimming backlight units (BLU) that enable form factors and contrast performance”4 that rival the quality of OLED displays. MiniLEDs also have an advantage as a cost-effective solution for narrow-pixel-pitch LED direct-view displays such as indoor and outdoor digital signage applications.

MicroLEDs do offer high luminous efficiency, brightness, contrast, reliability and a short response time, but they are likely to be priced at more than three times traditional LED screens during initial the initial stages of mass production. MiniLEDs, while they perform more like traditional LEDs, do have advantages when it comes to HDR and notched or curved display designs, and could launch at just 20% above standard LCD panel prices.5 According to PCWorld, “at this stage, the biggest difference between microLED and miniLED for consumers is that microLED is likely to make it to market as a fully-fledged next-generation display technology of its own while miniLED is likely to mostly be used by manufacturers to enhance existing display technologies.”6

“MiniLED for Display Applications: LCD and Digital Signage” report by Yole Développement, October 2018, as reported in “Mini-LED adoption driven by high-end LCD displays and narrow-pixel-pitch LED direct-view digital signage”. Semiconductor Today, November 28, 2018. LINK

QLED stands for Quantum Dot Light-Emitting Diode, also referred to as quantum dot-enhanced LCD screen. While similar in working principle to conventional LCDs, QLEDs are using the properties of quantum dot particles to advance color purity and improve display efficiency. Quantum dots are integrated with the backlight system of the LCD screen, most commonly with the help of Quantum Dot Enhancement Film (QDEF) that takes place of the diffuser film. Blue LEDs illuminate the film, and quantum dots output the appropriate color, based on their size.

OLED stands for Organic Light-Emitting Diode, which is self-emitting. Not all OLEDs are using the same tech though. The OLED technology used in phone screens is RGB-OLED, which is completely different from the White OLED (also referred to as W-OLED) used in TVs and large format displays.

RGB-OLEDs use individual sub-pixels emitting red, green, and blue light. RGB-OLEDs yield excellent color reproduction but are unfit for performance requirements of large format displays. With the evolution of materials and a difference in use cases comparing to TVs, RGB-OLED is a preferred technology for the smartphone use.

White OLEDs, in turn, emit white light, which then is passed through a color filter to generate red, green, and blue—similar to how LCDs function. Modern W-OLED color filters use RGBW (red, green, blue, white) structure, adding an additional white sub-pixel to the standard RGB to improve on the power efficiency, enhance brightness, and to mitigate issues with the OLED burn-in. Although having more complex circuit requirements than LCDs (emission is current-driven rather than voltage-driven), W-OLEDs can be utilized for large-scale displays.

Quantum Dot OLED TVs are expected to finally go real in 2021. As the name suggests, these TV displays will use Quantum Dot technology to enhance and improve the existing OLED panels.

How exactly are QD-OLED displays different from current OLED display panels manufactured by LG Displays and from Samsungs existing QLED TVs? The next year will also see a surge in mini LED TVs which will be priced a little below OLED TVs. So let’s compare these different TV technologies to better understand which one is better and why.

To understand the difference between these display technologies and why they exist, it must first be cleared that the OLED displays on TVs are not the same as OLED displays on phones.

Making similar OLED panels for large TVs with individual Red, Green and Blue subpixels, however, poses several manufacturing and longevity challenges. In fact, only one such TV was ever launched – the Samsung KE55S9C 55-inch UHD OLED- which was introduced in 2013.

The technology wasn’t scalable for larger resolution or bigger displays and thus Samsung shifted to Quantum Dots based QLED technology for its premium TVs.

In TVs, Quantum Dots are excited by higher energy or lower wavelength light than the emission color of the dot. To excite green and red color quantum dots, TV manufacturers thus use blue light and for blue subpixels, they let the blue light pass through as-is.

OLED TVs today use LG Display panels that have a white pixel along with red, green, and blue sub-pixels (and are also referred to as White OLED). This is used for enhancing brightness but reduces color vibrance. Upcoming QD-OLED panels will, in a way, re-instate RGB OLED with deeper, brighter, and more vibrant colors.

OLED technology is known to have problems with aging, but the current crop of OLED TVs handle this remarkably well. There are negligent chances that users will face issues like OLED burn-ins over a life span of 5 to 8 years.

One problem is that Quantum dots on the QD OLED TVs get excited by UV light falling on the TV from the outside. Secondly, Quantum Dot color conversion materials don’t always capture the entire blue light that is used to excite them and some of it may bleed into Red and Green subpixels.

Now that we have discussed how Quantum dots are enhancing existing OLED TVs, you might be wondering how the Quantum Dot technology is implemented on existing Samsung QLED TVs.

A QLED TV works just like LCD TVs, but a Quantum Dot Enhancement Film( QDEF) is used in front of the Blue LED backlight to convert portions of the blue light to Red and Green in order to get pure White light. This helps enhance brightness and achieve a wider color gamut for better HDR performance.

QLED TVs are better at avoiding the backlight bleed into the display colors as compared to conventional LED or mini LED TVs. Samsung’s high-end QLED models can also get brighter than TV OLED displays. Color conversion is still done using a color filter in front of the LCD module.

LED TVs don’t have self-emissive pixels and it’s not possible to turn off individual pixels. The LCD substrate merely blocks the white light from the backlight to portray blacks, resulting in slightly greyish blacks more noticeable in dark ambiance. The contrast and black level can however be improved by turning off a portion or zone of the backlight.

That’s where mini LED TVs come in. These TVs have an array of mini LEDs behind the screen which can be individually turned off for a section of the screen. These mini LEDs don’t map pixels one to one, but having more zones helps with better local dimming control and thus enhances quality over conventional edge-lit LED displays.

Samsung Displays is manufacturing QD-OLED displays but Samsung Electronics isn’t keen on adopting the technology. That’s because Samsung has been marketing QLED as superior to OLED panels for years and transitioning back to OLED or OLED-based TVs will make them lose face.

tft lcd ips vs ltps lcd pricelist

Two of the main contenders for display technologies that are widely available are AMOLED and LCD. Here in this article, we will be comprising AMOLED vs LCD and find out which one is better for you.

The AMOLED display is similar to the OLED in various factors like high brightness and sharpness, better battery life, colour reproduction, etc. AMOLED display also has a thin film transistor, “TFT” that is attached to each LED with a capacitor.

TFT helps to operate all the pixels in an AMOLED display. This display might have a lot of positives but there are a few negatives too let’s point both of them out.

The LCD stands for “Liquid Crystal Display”, and this display produces colours a lot differently than AMOLED. LCD display uses a dedicated backlight for the light source rather than using individual LED components.

The LCD displays function pretty simply, a series of thin films, transparent mirrors, and some white LED lights that distributes lights across the back of the display.

As we have mentioned, an LCD display always requires a backlight and also a colour filter. The backlight must have to pass through a thin film transistor matrix and a polarizer. So, when you see it, the whole screen will be lit and only a fraction of light gets through. This is the key difference comparing AMOLED vs LCD and this is what differentiates these two display technologies.

The LCD displays are cheaper compared to the AMOLED as there is only one source of light which makes it easier to produce. Most budget smartphones also use LCD displays.

LCD displays have bright whites, the backlight emits lots of light through pixels which makes it easy to read in outdoors. It also shows the “Accurate True to Life” colours, which means it has the colours that reflect the objects of the real world more accurately than others.

LCDs also offer the best viewing angle. Although it may depend on the smartphone you have. But most high-quality LCD displays support great viewing angles without any colour distortion or colour shifting.

The LCD displays can never show the deep blacks like AMOLED. Due to the single backlight, it always has to illuminate the screen making it impossible to show the deep blacks.

The LCDs are also thicker than other displays because of the backlight as it needs more volume. So, LCD smartphones are mostly thicker than AMOLED ones.

Let’s start with the pricing. Most AMOLED display smartphones always cost more than an LCD smartphone. Although the trend is changing a bit. But still, if you want to get a good quality AMOLED display you have to go for the flagship devices.

The colors are also very sharp and vibrant with the AMOLED displays. And they look much better than any LCD display. The brightness is something where LCDs stood ahead of the AMOLED display. So using an LCD display outdoors gives much better results.

Looking at all these factors and comparing AMOLED vs LCD displays, the AMOLED displays are certainly better than the LCDs. Also, the big display OEMs, like Samsung and LG are focusing more the OLED technologies for their future projects. So, it makes sense to look out for AMOLED displays. That being said, if we see further enhancements in the LCD technology in terms of battery efficiency and more, there is no point to cancel them at this moment.

tft lcd ips vs ltps lcd pricelist

LTPO, which stands for low-temperature polycrystalline oxide, is shaping up to be the next-generation technology for premium phones and wearables. It basically combines LTPS and IGZO for the display backplane. Let us explain.

Every AMOLED display has a backplane that determines when individual pixels turn on and how bright they glow. Most backplanes use two separate transistors (TFTs) – one for switching on a pixel (Switching TFTs) and one for maintaining its brightness (driving TFTs). The Driving TFT is also accompanied by a Capacitor that samples and holds a voltage to uniformly drive a pixel brightness.

LTPO displays use faster LTPS for switching circuits and more power-efficient IGZO material for driving circuits (more on that in a bit). Faster LTPS switching circuits make dynamically changing refresh rates possible (VRR on phones) and power-efficient IGZO driving TFTs help to reduce power consumption by 5 to 20 percent.

Thus LTPO displays combine the benefits of both IGZO and LTPS backplanes. These displays can quickly switch between different refresh rates in a power-efficient manner and thus make VRR possible. LTPO panels can reduce power consumption by 5 to 20 percent.

As described above, each AMOLED pixel comprises of two Thin Film Transistors (TFT)- Driving TFT and Switching TFT- and one Capacitor. In an LTPO display, the switching circuits use LTPS TFT and driving circuits use IGZO TFT.

Amorphous Silicon (a-Si) TFT technology used to be dominant for display backplanes. With a need for high resolution and brighter screens, the industry shifted to LTPS TFT backplanes (for both OLED and LCD), and then the need for higher resolution and high-refresh-rate brought in more complicated IGZO TFT (Oxide TFT) panels.

LTPS (Low-temperature polycrystalline silicon) backplanes have higher electron mobility and thus can turn pixels on/off faster. Or transistor size can be reduced and more transistors can now be added within the same space, thus resulting in more pixels or higher resolution. However, along with faster mobility, LTPS panels also have higher leakage.

IGZO (indium gallium zinc oxide) backplane technology or transistors used in backplanes that are often used for IPS LCD displays. IGZO transistors are transparent and thus IGZO backplane displays require less backlight power and consume less power. Electron Mobility of IGZO is as high as LTPS and these displays are more touch-sensitive (we are guessing the use of IGZO in Samsung Galaxy Note20 Ultra’s display plays a major role in reducing S Pen latency to 9ms).

So, the LTPO display combines the benefits of both LTPS and IGZO resulting in a more responsive screen that consumers lesser power than conventional LTPS screens. As stated above, in LTPO panels, the switching circuits use LTPS TFTs and the driving TFTs use IGZO materials.

tft lcd ips vs ltps lcd pricelist

If you want to buy a new monitor, you might wonder what kind of display technologies I should choose. In today’s market, there are two main types of computer monitors: TFT LCD monitors & IPS monitors.

The word TFT means Thin Film Transistor. It is the technology that is used in LCD displays.  We have additional resources if you would like to learn more about what is a TFT Display. This type of LCDs is also categorically referred to as an active-matrix LCD.

These LCDs can hold back some pixels while using other pixels so the LCD screen will be using a very minimum amount of energy to function (to modify the liquid crystal molecules between two electrodes). TFT LCDs have capacitors and transistors. These two elements play a key part in ensuring that the TFT display monitor functions by using a very small amount of energy while still generating vibrant, consistent images.

Industry nomenclature: TFT LCD panels or TFT screens can also be referred to as TN (Twisted Nematic) Type TFT displays or TN panels, or TN screen technology.

IPS (in-plane-switching) technology is like an improvement on the traditional TFT LCD display module in the sense that it has the same basic structure, but has more enhanced features and more widespread usability.

These LCD screens offer vibrant color, high contrast, and clear images at wide viewing angles. At a premium price. This technology is often used in high definition screens such as in gaming or entertainment.

Both TFT display and IPS display are active-matrix displays, neither can’t emit light on their own like OLED displays and have to be used with a back-light of white bright light to generate the picture. Newer panels utilize LED backlight (light-emitting diodes) to generate their light hence utilizing less power and requiring less depth by design. Neither TFT display nor IPS display can produce color, there is a layer of RGB (red, green, blue) color filter in each LCD pixels to produce the color consumers see. If you use a magnifier to inspect your monitor, you will see RGB color in each pixel. With an on/off switch and different level of brightness RGB, we can get many colors.

Winner. IPS TFT screens have around 0.3 milliseconds response time while TN TFT screens responds around 10 milliseconds which makes the latter unsuitable for gaming

Winner. the images that IPS displays create are much more pristine and original than that of the TFT screen. IPS displays do this by making the pixels function in a parallel way. Because of such placing, the pixels can reflect light in a better way, and because of that, you get a better image within the display.

As the display screen made with IPS technology is mostly wide-set, it ensures that the aspect ratio of the screen would be wider. This ensures better visibility and a more realistic viewing experience with a stable effect.

Winner. While the TFT LCD has around 15% more power consumption vs IPS LCD, IPS has a lower transmittance which forces IPS displays to consume more power via backlights. TFT LCD helps battery life.

Normally, high-end products, such as Apple Mac computer monitors and Samsung mobile phones, generally use IPS panels. Some high-end TV and mobile phones even use AMOLED (Active Matrix Organic Light Emitting Diodes) displays. This cutting edge technology provides even better color reproduction, clear image quality, better color gamut, less power consumption when compared to LCD technology.

This kind of touch technology was first introduced by Steve Jobs in the first-generation iPhone. Of course, a TFT LCD display can always meet the basic needs at the most efficient price. An IPS display can make your monitor standing out.

tft lcd ips vs ltps lcd pricelist

Just one year back, the outlook for LTPS LCD (Low Temperature Polycrystalline Silicon Liquid Crystal Display) was filled with fear and uncertainties as smartphone brands such as Samsung, Apple and top China brands shifted their focus to Flexible OLED displays.

LTPS LCD has been the display of choice for most high end products and iPhone models in recent years, but intense interest in flexible OLED display, rave reviews, an expected iPhone shift to OLED and hopes of higher adoption rates created demand uncertainties for LTPS LCDs last year. This year is bringing a change. After slower than expected sales of the iPhone X, the industry’s mood is shifting. Can it bring new opportunities for LTPS LCD?

Slow demand and increased LTPS LCD capacity resulted in oversupplyThe success of LTPS LCD panels in high end smartphones, especially iPhones, led many display companies such as JDI, BOE, Tianma, AUO and Sharp, to invest in Gen 6 LTPS LCD fab capacity aggressively in the last few years. The rise of flexible AMOLED and Apple’s decision to adopt that technology has created challenges for LTPS LCD. By the end of 2016, some display suppliers started to delay their expansion plans for LTPS and to focus more on AMOLED displays. Nevertheless, substantial growth of LTPS LCD capacity came in 2017, just when industry interest was waning and global smartphone demand was slowing down. JDI from Japan continued to be the leader but there were substantial capacity growth from China, especially from Tianma.

Last year, the smartphone market also saw the introduction of very high priced phones ($850 to $999) from Samsung and Apple using AMOLED flexible displays. That has helped to increase the average ASP of phones but has not helped the growth in global unit shipments. Smartphone market growth slowed down in 2017 due to saturation in mature markets, a slow upgrade to smartphones from feature phones in emerging markets and longer replacement cycles. LTPS LCD faced fierce competition and oversupply as demand slowed down, leading to aggressive price reductions.

Lowered panel prices have the potential to help in demand creation. Reductions can enable smartphone brands to offer mid-range priced devices ( $500-$600) with higher performance, providing better value to customers. The mid-range segment of the market saw faster growth last year. In spite of over-supply and slower smartphone demand, lower prices boosted LTPS LCD panel unit growth in 2017. The year 2018 can also offer unit growth for LTPS LCD panels due to lower price, increased capabilities and the impact of iPhone X sales.

LTPS reinvented its capabilities in the face of fierce competitionLTPS LCD has higher electron mobility than other TFT-LCDs, especially a-Si (Amorphous Silicon). Since a large aperture ratio (which is possible because of the smaller transistors, enabled by the better mobility) enables better use of the light, power consumption can be reduced or brightness can be increased. LTPS LCD is suitable for high pixel densities and up to 800 ppi is already possible.

Suppliers such as JDI, AUO and others are making products with advanced in-cell touch technology that enables thin, highly sensitive panels with lower costs. LTPS enables smartphones with a narrow border, resulting in full active bezel-less (or thin bezel) product with a screen-to-body ratio closer to AMOLED-based products from Samsung or Apple. Smartphone brand Asus, showcased a LTPS IPS LCD product at Mobile World Congress (MWC) conference recently, that had a similar screen-to-body ratio as the iPhone X and Samsung Galaxy products. Asus also used an AI chip to reduce power consumption further. Many smartphone brands are coming up with new designs and new, lower priced offerings.

OLED displays can be thinner, lighter, have better color, lower power and better design differentiation especially with flexible displays and plastic substrates. Foldable phones with flexible OLED displays can show truly differentiated design, which will be difficult for LCD to match. As for flexible display, OLED shines and LCD struggles. JDI is planning to introduce LTPS-based plastic full active flex smartphone displays in 2018, where it will be possible to form curved shapes. In the near term, redesigned LTPS LCD has been able to reduce the performance and features gap and even design differentiation gaps with OLED by reinvention. This can also come at a substantially lower cost. With lower price, increased supply LTPS LCD can now bring value differentiation driving demand growth.

Apple iPhone X - AMOLED impactIntense interest in flexible OLED display, rave reviews, the expected iPhone X shift to OLED and hope of higher adoption rates created demand uncertainties for LTPS LCDs last year. After lower than expected sales for iPhone X, the industry mood is shifting. There is talk in the industry about Apple reducing flexible AMOLED display procurement in 2018. Now Apple is expected to introduce only one AMOLED mode