t con lcd panel free sample

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Televisions contain various complex parts that are imperative to the device’s overall function. The main component that falls into this category is the T-Con board. To better understand this impactful electronic device, read on to learn everything you need to know about the T-Con board in a TV.

T-Con stands for timing controller. Professionals may also refer to T-Con boards as a “controller board” or “control board.” It is the smallest board inside an LCD TV.

A T-Con board is responsible for generating the horizontal and vertical timing panel signals as well as providing panel bias and enabling signals. It controls the logic signal of gate and serves as a source for driving the thin-film transistor (TFT) liquid crystal display (LCD).

The main part of a T-Con board is a T-Con chip. This chip receives pixels from the scaler in a sequential format before driving the LCD collection’s individual pixel components. This interface takes place internally. As such, there is a wide number of connections that can take place. Between a scaler and a T-Con board, there are often many parallel links—contrary to a typical monitor-source connection which usually requires just one single cable to carry an entire image.

If your TV is currently displaying signs of a T-Con board issue, ElectroParts can help you out. We offer a wide range of HDTV T-Con boards for various TV models. Browse our collection to find LG, Akai, Emerson, Element, Fujitsu, Insignia, and Sony T-Con boards. To learn more about our products, contact us today.

The present disclosure relates to the field of liquid crystal displays (LCDs), and more particularly to a method for displaying a flicker pattern of an LCD module, a method for adjusting a common voltage, and an LCD module. BACKGROUND

Voltage of a liquid crystal display (LCD) has a positive polarity and a negative polarity because an LCD device needs to be driven by alternating current (AC). Theoretically, amplitude of the positive polarity should be equal to amplitude of the negative polarity. However, deviation of a common voltage (VCOM) may occur because of different characteristics of each LCD panel, and errors may be generated in at manufacturing process of the LCD panel, which results in faults of a display of the LCD panel. The VCOM needs to be adjusted to avoid the deviation of the VCOM. For example, if the positive polarity voltage is 10 V the VCOM may be 5 V. However, in practice, the positive polarity voltage may become 9 V because of being affected by many external factors, at this moment, the VCOM needs to be adjusted to 4.5 V. Therefore, a flicker pattern test may be used to assist technical staff to adjust and get an optimum VCOM potential of the LCD panel.

As shown in FIG. 1 in order to make an LCD module display the flicker pattern on the LCD module, a power source should be added to light the LCD panel and a backlight module, and a pattern generator is needed to provide the flicker pattern. The pattern generator is a professional signal generator with high cost. In addition, because there are various flicker patterns for various LCD modules that are used to adjust the VCOM, the tester should select an appropriate flicker pattern. But, because there are so many kinds of flicker patterns, there are the disadvantages of low efficiency and easy error occurrence when the tester selects the flicker patterns. SUMMARY

In view of the above-described problems, the aim of the present disclosure is to provide a method of a liquid crystal display (LCD) module, a method for adjusting a common voltage, and an LCD module. A flicker pattern of the LCD module is saved in a timing controller without using a pattern generator to provide the flicker pattern. Thus, cost of the pattern generator is saved.

In one example, the flicker pattern is set as a default image displayed by the LCD module when the LCD module enters a free run mode, and the flicker pattern is displayed when the LCD module enters the free run mode.

In one example, a built-in self test (BIST) pin of the T-CON is connected to a ground to enable the LCD module to enter the free run mode and display the flicker pattern on the LCD module.

In one example, the flicker pattern is set as a default image displayed by the LCD module when the LCD module enters a free run mode, when the LCD module enters the free run mode, the flicker pattern is displayed on the LCD module.

In one example, a built-in self test (BIST) pin of the T-CON is connected to a ground (GND) to enable the LCD module to enter the free run mode and display the flicker pattern on the LCD module.

In one example, the BIST pin of the T-CON is connected with a switch, and the switch is connected with a high level signal (VDD) and the GND. When the switch is switched to the GND, the LCD module enters the free run mode and displays the flicker pattern on the LCD module, when the switch is switched to the VDD, the LCD module is in a normal test mode.

A third technical scheme of the present disclosure is that: an LCD module comprises a timing controller (T-CON), and a flicker pattern that is used to adjust a common voltage is saved in the T-CON.

Advantages of the present disclosure are summarized below: existing structure and technology are mainly used in the method of the present disclosure, where the LCD module displays the flicker pattern on the LCD module. There only needs to be a few hardware changes, only the flicker pattern that is used to adjust the VCOM is saved in the T-CON, and cost is not increased when one flicker pattern is saved in the T-CON because many patterns that are used to test a aging of the LCD module are already saved in the T-CON. The trigger condition is set for the flicker pattern, the flicker pattern is displayed by the LCD module when the LCD display meets the trigger condition, and then optimization of the VCOM is performed. Thus, traditional methods for displaying the flicker pattern on the LCD module do not need to be used, a pattern generator is not needed, and a number of apparatuses needed in production line is reduced. Moreover, because the flicker pattern is owned by the T-CON and is automatically displayed without being selected, number of errors is reduced. BRIEF DESCRIPTION OF FIGURES

The present disclosure provides a method that a liquid crystal display (LCD) module displays a flicker pattern on the LCD module. FIG. 2 shows an example of the method, and the method comprises steps:

Existing structure and technology are mainly used in the method of the present disclosure, where the LCD module displays the flicker pattern on the LCD module. There only needs to be a few hardware changes, only the flicker pattern that is used to adjust the VCOM is saved in the T-CON, and cost is not increased when one flicker pattern is saved in the T-CON because many patterns that are used to test ageing of the LCD module are already saved in the T-CON. The trigger condition is set for the flicker pattern, the flicker pattern is displayed by the LCD module when the LCD display meets the trigger condition, and then optimization of the VCOM is performed. Thus, traditional methods for displaying the flicker pattern do not need to be used, a pattern generator is not needed, and a number of apparatuses needed in production line is reduced. Moreover, because the flicker pattern is owned by the T-CON and is automatically displayed without being selected, number of errors is reduced.

In the example, the flicker pattern is set as a default image displayed by the LCD module when the LCD module enters a free run mode, and the flicker pattern is displayed on the LCD module when the LCD module enters the free run mode. The trigger condition is a condition which enables the LCD module to enter the free run mode.

The LCD module of the present disclosure comprises the T-CON. One flicker pattern that is used to adjust the VCOM is saved in the T-CON. The LCD module displays the flicker pattern on the LCD module when the LCD module meets the trigger condition. In the aforementioned method, the flicker pattern is set as the default image displayed by the LCD module when the LCD module enters the free run mode. The LCD module displays the flicker pattern on the LCD module when the LCD module enters the free run mode.

In the prior art, when the T-CON is in an abnormal state, such as in a state of built-in self test (BIST) being disabled, a state of having no low-voltage differential signaling (LVDS) clock, or a state of having no data enable signal, the LCD module may enter the free run mode. At this moment, the LCD panel displays a black image. Because a default condition of a BIST pin of the T-CON is a high level signal (VDD), if the BIST pin of the T-CON is set to be connected with a ground (GND), the T-CON is in the abnormal state, namely the LCD module enters the free run mode and displays the default image. The present disclosure uses the flicker pattern to replace the black image, namely when the LCD module enters the free run mode, the flicker pattern is displayed as the image, then optimization of the VCOM is performed. Thus, the traditional methods for displaying the flicker pattern do not need to be used, and the pattern generator is not needed. Moreover, because the flicker pattern is owned by the T-CON and automatically displayed without being selected, errors may not occur. The method for displaying the flicker pattern has the advantages of simplicity, easy achievement, and high efficiency.

The present disclosure further provides a method for adjusting a common voltage (VCOM). When the LCD module triggers and displays the flicker pattern using the method mentioned above, the common voltage may be optimized.

In the example, the BIST pin of the T-CON is connected with a switch, and the switch is connected with the VDD and the GND. When the switch is switched to the GND, the LCD module enters the free run mode and displays the flicker pattern on the LCD module, and when the switch is switched to the VDD, the LCD module is in a normal test mode. Because adjusting the VCOM is only one workstation of the production line of the LCD module, and the T-CON enters the abnormal state only in the workstation of adjusting the VCOM, the switch should be switched to the VDD after task in the workstation of adjusting the VCOM is accomplished, which enable the T-CON to return to the normal state and does not affect subsequent workstations.

Optionally, there are also other methods for enabling the LCD module to enter the free run mode, for example enabling the T-CON to enter a state of BIST being disabled, a state of having no LVDS clock, or a state of having no data enable signal.

The present disclosure is described in detail in accordance with the above contents with the specific preferred examples. However, this present disclosure is not limited to the specific examples. For the ordinary technical personnel of the technical field of the present disclosure, on the premise of keeping the conception of the present disclosure, the technical personnel can also make simple deductions or replacements, and all of which should be considered to belong to the protection scope of the present disclosure.

United States. Bureau of International Business Operations, United States. Department of Commerce. Bureau of International Programs, United States. Bureau of International Commerce

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Different displays use different types of TCONs. In this article we will be talking about TCONs for the IT market: LCD (Liquid Crystal Display) notebook PCs and monitors.

An LCD panel has millions of Red, Green, and Blue (RGB) liquid crystals that are used to block a white backlight when electrical voltage is applied to them. High voltage signals to each individual pixel control how much of the backlight to block. A white display means nothing is being blocked. A black display means all three colors are blocked at maximum effort.

The strength of the filtering determines the Contrast Ratio. The brightness of the backlight determines the intensity of the display. Varying levels of filtering produce the different colors. The speed of the voltage adjustment affects the pixel response time.

TCONS direct the high voltage driver chips that move the color filters and are usually found on a circuit board that sits below the glass panel (Fig. 1).

eDP was developed to be used specifically in embedded display applications such as notebooks, noteback PCs, all-in-one PCs. It is based on VESA DisplayPort ™ standard, same electrical interface and can share the same video port on the GPU (Fig. 2).

eDP connections are fast, use few wires, and are flexible for size, bandwidth and adding features eDP provides all panel connections in one plug, including power, data, and control signals. This is Analogix’s specialty.

ARM processors usually use MIPI connections. MIPI connections require more wires but are lower power than eDP.  They usually only work for screen sizes up to 10 inches

While the GPU is responsible for transforming mathematical equations into individual pixels and frames, a TCON takes the individual frames generated by the GPU, corrects for color and brightness, then sends out parts of the image to each individual driver at the panel’s specific timing.

The human eye has an incredible dynamic range.  That means we can see both very dark images and very bright images, at the same time. However, neither camera sensors nor display panels can display that range. Your camera generates HDR images by using images from multiple exposures to combine the brightest and darkest parts of the picture. This increases the contrast (dynamic range) between light and dark, pulling out details from darkened or washed out areas.

HDR accurately maps real world color and luminance to a display panel. VESA DisplayHDR™ standard specifies HDR quality, including luminance, color gamut, bit depth, and rise time.

Display panels have difficulty displaying a wide range of brightness. Normal sunlight can reach 10,000 nits, but the backlight on most notebooks today is around 250 nits

VESA DisplayHDR requires the panel to meet minimum brightness, contrast, and color. No panel can reach 10,000nits of natural light. The brightest a 250nit notebook panel can produce is 250nits and any image above 250nits is washed out.  Also, no details from 250 nits to 10,000nits can be seen.

The HDR400 specification requires 1000:1 contrast ratio. This is difficult because even at full voltage, the liquid crystals cannot block 100% of the backlight. That is why you always know when your TV is on, even if there is nothing on the screen.

The HDR400 specifications require a dimmable backlight which helps with both producing darker blacks and lowering the power consumption. Tone mapping is used to map the whole range of 10,000 nits down to what the panel can handle, so the details can be seen. Tone mapping does not increase the brightness of the panel; it only makes the details visible.

VESA DisplayHDR600 Requires local dimming. No LCD panel can reach the VESA DisplayHDR600 requirement of 6000:1 contrast ratio. However, this can be overcome with local dimming.

For example, a 750:1 contrast panel requires 8 different backlight power settings to reach 6000:1 contrast ratio. However, unless there are thousands of separate regions, local dimming always produces halos around the bright areas. In order to reduce the halos, the following are recommended:

Limit the adjacent segment difference (in TCON). This reduces contrast ratio and power savings for reduced halo. It’s recommended cutting backlight power by half on each adjacent segment;

Monitors can use a direct backlight with many regions. An extra layer of liquid crystal can be used to dim the backlight at a specific location but this often results in a panel that is too thick for a notebook.

Notebook backlights use LEDs on the edge of the panel to reduce panel thickness. These can be on 1 side, 2 sides, or all 4 sides. Each edge adds to cost and bezel size.

Global Dimming Power Savings - Figure 6 shows a 15.6” UHD panel with 400nit maximum brightness. Figure 7 shows a comparison of backlight power consumption values between 400nit, 50nit and, respectively 5nit.

The primary goal of color management is to obtain a good match across color devices; for example, the colors of one frame of a video should appear the same on a computer LCD monitor, on a TV screen, and as a printed poster. Color management helps to achieve the same appearance on all of these devices, provided the devices are capable of delivering the needed color intensities. Color management cannot guarantee identical color reproduction, as this is rarely possible, but it can at least give more control over any changes which may occur.

A PC in HDR and SDR modes use different color gamut but the same screen. Dual-panel phones and notebooks need the color of the two sides to match perfectly. Graphic artists for web sites, movies, video games, etc., need to know what they are creating looks the same on their screen as on their customers’ screens.

As panels improve, the color space of new panels may exceed the color space from Windows.  This results in displays which look oversaturated. There is a trend towards low blue light or “night shift” panels, while still retaining color accuracy for the other colors. Today, low blue light panels are created by measuring each individual panel, then hoping that the yield is high enough.

Analogix’s Advanced Color Blocking (ACB) technology is used to create consistent image quality across different panels and change color space for different usage modes (Fig. 8). It allows for 3D color gamut rotation in the optical color domain rather than the RGB domain and color space change on the fly, such as color mapping of BT.2020 source to sRGB or DCI-P3 panels. It includes LUT shadow registers and hardware transition calculations (to smooth changes).

Color conversion in the TCON can dynamically and continuously adjust the incoming signal from the GPU for a low blue light color space. This way, no individual panel measurement is needed and yields should increase. While this can also be done by the GPU itself, that takes GPU bandwidth and 500x more power.

Panel Self-Refresh (PSR) – frame buffer in a TCON can maintain a display image without receiving video data from the CPU. For a still image, this allows the GPU to enter a low-power state and the eDP main link to turn off. Allowing the GPU to power down between display updates will save significant power and extend battery life.

Except when watching a movie or playing a game, there are many times when the video does not change for multiple frames. PSR saves power for full-screen images.

Panel Self-Refresh with Selective Update (PSR2) is a superset of the panel self-refresh feature and it allows the transmission of modified areas within a video frame with obvious benefits when watching a movie or playing a game. PSR2 identifies when only a portion of the screen is static, which is a selective update. In PSR2, when the full screen is static, the refresh rate can be lowered for further power savings as done by Intel Low Refresh Rate (LRR). Intel LRR lowers the refresh rate by changing pixel clock or by changing vertical blank depending on the scenario such as idle, playing video, browsing, etc. All Analogix TCONs support Intel LRR.

Displays are refreshed at a frequency of 60Hz. However, GPUs refresh displays whenever they are ready. This technology synchronizes GPU output with display refresh by dynamically changing the refresh rate without needing any mode change with a focus on reducing stuttering, tearing, and input lag.

Dynamic overdrive changes the overdrive parameters depending on the situation. Overdrive and PSR can share the same frame buffer. This enhances the experience of all kinds of applications including gaming and video editing.

In-Cell Touch embeds the touch function in the display itself, the panel including all the touch sensors, controllers, and needed processing. This simplifies the production process and reduces weight and reflection by removing the cover glass. It also allows for thinner bezels as there is no need for daughter cards and no separate wires for touch, as well as lighter devices as the cover glass is removed.

Analogix has pioneered the in-cell touch notebook panel TCONs. About 15% of notebooks support touch and we expect the touch attach rate to increase as more active pen support is introduced.

The scientists identified three different behaviors in the data from the freshly cut samples: firm samples with low AUC and tswal values: Granny Smith and Fuji; mealy samples with high AUC, imax, tswal values and low tcon values: Morgen Dallago and Golden Delicious; and firm samples with high AUC and imax values: Red Delicious.

The 3D TCON supports HDMI 1.4 3D format, as well as converting different 3D input sources into 3D format suitable for all 3D displays, without the need for an extra chip or software.

The Spicer TCon transmission controller, Spicer ICon intelligent controller and Spicer ACon advanced controller work with the Spicer TE series of transmissions to provide enhanced electronic control capabilities--including electronically modulated clutch engagement and operator-controlled, electronically modulated inching.

Release date- 28082019 - SAN DIEGO - TRACON Pharmaceuticals (Nasdaq: TCON), a clinical stage biopharmaceutical company focused on the development and commercialization of novel targeted therapeutics for cancer, wet age-related macular degeneration through our license to Santen Pharmaceutical Co.

Ophthalmology medicines specialist Santen Pharmaceutical Co Ltd and biopharmaceutical firm TRACON Pharmaceuticals (NASDAQ: TCON) have initiated their Phase 2a clinical study of DE-122 in patients with wet age-related macular degeneration (AMD), the two companies announced on Wednesday.

has launched a new family of eDP Tcon devices for LCD panels that consume very low power, making them ideal for small-form factor, battery-powered devices.

Release date- 07082019 - SAN DIEGO - TRACON Pharmaceuticals (NASDAQ: TCON), a clinical stage biopharmaceutical company focused on the development and commercialization of novel targeted therapeutics for cancer and wet age-related macular degeneration through our license to Santen Pharmaceutical Co.

TV screen lines are an irritating occurrence, and many different issues with the TV can cause them. This article will go over what causes this, whether or not you can fix it depending on the cause, and how to fix it.

When any part of a TV"s display gets damaged, corrupted, or is defective, it can cause lines to appear on the screen. Some TV parts that can cause horizontal lines to appear are the LCD panel, T-Con board, or row drivers.

Issues with these parts can happen for many reasons, and the way your lines appear can tell you a lot about what"s wrong. If the lines are new, one of these parts was likely damaged.

If you"re seeing colored horizontal lines, it may be because of the T-Con board. If other parts don"t seem to be an issue, this part of the TV could be causing the lines.

If lines appear on your TV, you"ll want to inspect the TV itself. You can fix some issues that cause lines to appear, but others may require a professional or a new TV altogether. Some of the most common causes of horizontal lines are:

LCD screen damage. The LCD provides your TV display with light. If you"re handy, you might be able to fix this by doing a little work with the insides of the TV, which you can read about below.

Other devices you"ve connected to the TV. They may also be having issues of their own or might not be compatible with your TV. In this case, you"ll have to inspect the device instead of the TV.

All these issues can be fixed, though it ranges in difficulty. If you"re unsure how to repair your TV, you may want to get the TV professionally repaired.

Knock or tap on the back of your TV. If the issue is with cable connections, this could solve the problem. It could also indicate a problem with your T-Con board. It won"t fix the issue, and the lines may reappear, but it can give some insight into the problem. If it"s your T-Con board, you"ll want to have T-Con replaced.

Change your TV"s settings. This step might work for you if the issue isn"t because of damage. First, try switching the TV input from different HDMI ports or AV ports. Doing this can rule out problems with specific inputs.

Run a picture test on your TV. It"s a built-in feature on newer TV"s which allows you to see if the TV display is corrupted. Doing this may look different depending on your TV, but generally, you can go into the settings and find a support option or just a picture test option.

Take a look at the LCD screen. If it"s damaged, you may want to get the screen repaired or replaced. It may be a less costly option than buying a new TV altogether.

Vertical lines on a TV appear for the same reasons as horizontal lines: loose cables and wires, screen damage, or a faulty T-Con board. Leaving the TV turned on for too long can also cause vertical lines.

The steps for fixing lines on your TV will also work to fix TV glitches like flicker and stutter. For example, check the cables and connectors and ensure there"s no issue with your input device.

If your TV screen looks blue, it could be faulty connections, a defective backlight, or incorrect color settings. Some LED TVs naturally have a blue tint, which you can offset by changing the color temperature.

To fix screen burn on a TV, adjust the brightness settings and enable pixel-shift. Sometimes playing a colorful video with fast-moving action for half an hour might help.

Ever had your TV showing nothing but a black screen even if the audio was working? Unfortunately, that’s a common issue with low/middle-end LCD/LED TVs these days… Even more frustrating, this issue often comes from a rather tiny and cheap component that can be easily replaced. Most common issues are:

One of my relatives had this exact symptom happening all of a sudden. This problem on low-end TVs often occurs within the first couple years. As the repair costs for that kind of TV is pretty low, considering repairing it yourself might be a good idea!

The first step into repair is to find the root cause of the issue. As backlight failure is a very common issue, this is the first thing to test. To do so, the easiest way is to power on your screen, put a flashlight very close to it and check if you can see the image through. The image would be very dark, like turning the brightness of the screen very very low.

That implies disassembling the TV to access the backlight which is between the LCD screen in the front and the boards in the rear. In my case, with a Samsung F5000, I had to process as follows:

First we have to remove the back housing to reveal the boards (from left to right: main board, T-CON, power supply) and disconnect the LCD panel from the T-CON board.

Note: Older TVs have neon tubes for backlight, which is thicker and less exposed to this kind of failure. LED backlight is the most common thing these days, but do not mistake an LED TV with an OLED TV. The first one is a classic LCD panel with a LED backlight, whereas the second is an OLED panel that doesn’t need any backlight as it is integrated in each pixels (making the spare parts much more expensive by the way).

As we can see, the backlight system is made of 5 LED strips. First thing to do is look for burnt LEDs. Most LED backlight systems have strips set in series, meaning that if one of the them fails, all the system goes dark…

Using a multimeter, we can confirm that the strips are indeed set in series, so now we have to test each strip individually. Professionals use LED testers such as this one (about 40$ on amazon) but as I didn’t had one at the time, I decided to make one, McGyver style!