wsvga tft lcd white screen free sample

Sometimes something display, sometimes no. Wiring seems good, and sometimes when everything is displayed suddenly with no reason screen become white after a display modification (adding a word or rectangle ...).

This module is a color active matrix TFT-LCD (Thin Film Transistor Liquid Crystal Display) module that uses amorphous silicon TFT as a switching device. This module is composed of LCD panel, driver IC, and LED backlight.

Shenzhen SLS Industrial Co.,ltd established in 2003, is a professional LCD module manufacturer and solution provider. We have 1 full-auto COG assembly line, 2 semi-auto assembly line, backlight assembly line, no dust TP bonding line and manufacturing tech support, we can provide unique, innovative and cost effective LCD module development and manufacturing. Our product range includes: middle-small size TFT LCD, industrial capacitive touch panel... Our LCD products have been widely used in communications, GPS, Equipment, electronic audio-visual, instrumentation, household appliances, PDA and other industries.

The NMLCD-220Q33is color active matrix liquid crystal display with light emission diode(LED) backlight system. The matrix employs a-Si Thin Film Transistor as the active element.

It is transflective type display operating in the normally white mode. This TFT-LCD has 2.2 inch diagonally measured active display area with (320*RGB*320) resolution. Each pixel is divded into red, Green and Blue sub-pixels or dots which are arranged in vertical stripes.

Shenzhen SLS Industrial Co.,ltd established in 2003, is a professional LCD module manufacturer and solution provider. We have 1 full-auto COG assembly line, 2 semi-auto assembly line, backlight assembly line, no dust TP bonding line and manufacturing tech support, we can provide unique, innovative and cost effective LCD module development and manufacturing. Our product range includes: middle-small size TFT LCD, industrial capacitive touch panel... Our LCD products have been widely used in communications, GPS, Equipment, electronic audio-visual, instrumentation, household appliances, PDA and other industries.

Focus Displays offers a wide range of standard full color TFT displays. 64 million unique colors, high brightness, sharp contrast, -30C operating temperature, and fast response time are all good descriptions of a TFT display. This is why TFT technology is one of the most popular choices for a new product.

Thin Film Transistor (TFT) display technology can be seen in products such as laptop computers, cell phones, tablets, digital cameras, and many other products that require color. TFT’s are active matrix displays which offers exceptional viewing experiences especially when compared to other passive matrix technologies. The clarity on TFT displays is outstanding; and they possess a longer half-life than some types of OLEDs and range in sizes from less than an inch to over 15 inches.

CCFL’s are still available, but are becoming a legacy (obsolete) component. TFT displays equipped with a CCFL require higher MOQs (Minimum Order Quantities) than displays with LED backlights.

The majority of TFT displays contain a touch panel, or touch screen. The touch panel is a touch-sensitive transparent overlay mounted on the front of the display glass. Allowing for interaction between the user and the LCD display.

Some touch panels require an independent driver IC; which can be included in the TFT display module or placed on the customer’s Printed Circuit Board (PCB). Touch screens make use of coordinate systems to locate where the user touched the screen.

Resistive touch panels are the lowest cost option and are standard equipment on many TFT modules. They are more common on smaller TFT displays, but can still be incorporated on larger modules.

Resistive touch panels are constructed using flexible materials with an air gap between and are coated with a resistive layer. When an object applies pressure to the top layer, it makes contact with microdots located on the bottom layer. This allows the touch screen to find the location of the touch using X and Y coordinates.

Custom resistive touch screens are an option if the customer requires a seal or gasket to be in contact with the glass and not in contact with the touch panel.

Resistive touch panels allow a single touch, although advances in new resistive technology will allow multi-touch operation in the near future. One main advantage of a resistive touch screen is the ability to be activated by the touch of any material. This includes a range of items from a bare finger, to a pencil, to even the edge of a credit card; regardless of its composition.

Current capacitive touch technology is limited to a conductive stylus such as a finger. The touch screen operates on capacitive sensing, based on capacitive coupling. A capacitive touch screen detects any material that is conductive or has a different dielectric then the air around it.

Contrast ratio, or static contrast ratio, is one way to measure the sharpness of the TFT LCD display. This ratio is the difference between the darkest black and the brightest white the display is able to produce. The higher the number on the left, the sharper the image. A typical contrast ratio for TFT may be 300:1. This number ratio means that the white is 300 times brighter than the black.

TFT LCD displays are measured in inches; this is the measurement of the diagonal distance across the glass. Common TFT sizes include: 1.77”, 2.4”, 2.8”, 3”, 4.3”, 5”, 5.7”, 5.8”, 7”, 10.2”, 12.1 and 15”.

TFT resolution is the number of dots or pixels the display contains. It is measured by the number of dots along the horizontal (X axis) and the dots along the vertical (Y axis).

Certain combinations of width and height are standardized and typically given a name and a letter representation that is descriptive of its dimensions. Popular names given to the TFT LCD displays resolution include:

Transmissive displays must have the backlight on at all times to read the display, but are not the best option in direct sunlight unless the backlight is 750 Nits or higher. A majority of TFT displays are Transmissive, but they will require more power to operate with a brighter backlight.

A primary job of the driver is to refresh each pixel. In passive TFT displays, the pixel is refreshed and then allowed to slowly fade (aka decay) until refreshed again. The higher the refresh frequency, the sharper the displays contrast.

The TFT display (minus touch screen/backlight) alone will contain one controller/driver combination. These are built into the display so the design engineer does not need to locate the correct hardware.

Response Time is the measurement of time it takes for a pixel/segment to change from black (OFF state) to white (ON state) and then back to black again. In other words, how fast the picture can be changed. A slow response time can result in the blurring of the picture in games, movies and even cad type programs.

If you do not see a Thin Film Transistor (TFT) Display module that meets your specifications, or you need a replacement TFT, we can build a custom TFT displays to meet your requirements. Custom TFTs require a one-time tooling fee and may require higher MOQs.

Ready to order samples for your TFT design? Contact one of our US-based technical support people today concerning your design requirements. Note: We can provide smaller quantities for samples and prototyping.

Shenzhen HCT Electronics Co., Ltd is a professional supplier of small and medium size TFT LCD panel and touch screen. Our products are produced in around 7,000 square meters production area, including 5,000 square meters 100 level to 1000 level dust-free workshop. Our Company is a ISO9001 and ISO14001 certified manufacturer and qualified producer of TS16949. Our well trained 2100 employees are having rich experience in producing touch screen and TFT LCD display with 10 years experience.Through modern management skills, by introducing constant updating newly automated technology and facilities into our production, contributing by our talented and innovative engineering human resources, Maxen can meet your diversified needs.

As a TFT LCD manufacturer, we import mother glass from brands including BOE, INNOLUX, and HANSTAR etc. Then cutting into small size in house, to assemble with in house produced LCD backlight by semi-automatic and automatic machine. Those processes contains COF (chip-on-glass), FOG (Flex on Glass) assembling, Backlight design and production, FPC design and production. So our experienced engineers have ability to custom the characters of the TFT LCD screen according to customer demands, except cannot customize LCD panel shape (TFT sizes are fixed at the glass making stage), we can custom high brightness TFT LCD, Flex cable, Interface.

Ampire is a Taiwan-based LCD module manufacturer with over 15 years’ experience in the field. To satisfy various needs, Ampire provides diversified and high-quality products (TFT, CSTN, FSTN, STN, TN) with different technologies (COG, TAB & COB), and custom designs when necessary.

Sometimes something display, sometimes no. Wiring seems good, and sometimes when everything is displayed suddenly with no reason screen become white after a display modification (adding a word or rectangle ...).