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Outlined in this section are TFT LCD (Thin Film Transistor Liquid Crystal Display) basic knowledge, including structures, driving methods (Passive Matrix / PMLCD, Active Matrix / AMLCD) and comparison, RGB filters, display mode, generations and production process.
As our society progresses into an overwhelmingly technological state, screens seem to pop up almost everywhere. Behind those glass displays, or flat panel displays, lie hundreds of thousands of complex, tiny devices, controlling the pixels that comprise the overall image we see. Those devices are known as Thin Film Transistors, or abbreviated, TFTs.
A TFT LCD, or a thin film transistor liquid crystal display, is one of the fastest growing forms of display technology today. The thin film transistor (TFT) is a type of semiconductor device used in display technology to enhance efficiency, compactness, and cost of the product.
LCD has a genetic disadvantage compared to other display technologies: Narrow Viewing Angles. For the last 40 years, scientists and engineers put a lot of effort to improve LCD viewing angles and made great progress. In this section we will introduce O-Film TFT, MVA (Multi-domain Vertical Alignment) TFT, IPS (In Plane Switching)and AFFS (Advanced Fringe Field Switching) TFT.
Most of TFT LCDs are hard to read under the sunlight. Orient Display offer Sunlight Readable TFT with these approaches: Transflective TFT, Surface Treatment, Optical Bonding.
Orient Display’s Electro-Optical Characteristics contains sections of Optical Measurement System, Viewing Angle Range & Measurement System, Contrast Ratio and Response Time.
The new line of 3.5” TFT displays with IPS technology is now available! Three touchscreen options are available: capacitive, resistive, or without a touchscreen.
For over 20 years Newhaven Display has been one of the most trusted suppliers in the digital display industry. We’ve earned this reputation by providing top quality products, services, and custom design solutions to customers worldwide.
The Arduino TFT screen is a backlit TFT LCD screen with a micro SD card slot in the back. You can draw text, images, and shapes to the screen with the TFT library.
The Arduino TFT library extends the Adafruit GFX, and Adafruit ST7735 libraries that it is based on. The GFX library is responsible for the drawing routines, while the ST7735 library is specific to the screen on the Arduino screen. The Arduino specific additions were designed to work as similarly to the Processing API as possible.
The TFT library relies on the SPI library, which must be included in any sketch that uses the scree. If you wish to use the SD card, you need to include the SD library as well.
If you are using an Esplora, the structure of the program is the exact same. As the Esplora has a socket designed for the screen, and the pins for using the screen are fixed, an Esplora only object is created when targeting sketches for that board. You can reference the screen attached to an Esplora throughEsploraTFT.
To give the illusion of motion, you need to quickly erase and draw images on the screen. When using Processing on a powerful computer, you can callbackground() every time through your draw() function to erase the window contests and dra objects in their new positions. The Arduino is not as fast, is it takes a little time to clear the screen when calling background() with the TFT library.
The TFT library includes a basic font for drawing text on screen. By default, characters are 5 pixels wide and 8 pixels tall. It is possible to change the font size to 10x16, 15x24, or 20x32. For additional information on the underlying font capabilities, see the Adafruit page on graphic primitives.
The TFT library has the ability to read .bmp files off a SD card and display them on the screen. Images can be smaller or larger than the screen resolution (160x128), but there is no method on the Arduino for image manipulation. The images should be sized before you put them on the SD card.
Connecting the pins in the proper way, you can see the lcd screen working with your Uno (or Duemilanove) just uploading the simple "TFTBitmapLogo" sketch.
The screen will show this message: "Arduino TFT Bitmap Example. Open serial monitor to run the sketch". Open the serial monitor to view the Arduino Logo.
Now that you have tested the basic functionality of the screen, see the TFT library pages for information about the library"s API and additional examples. It"s also recommended to visit the Adafruit graphics library page for additional information on functions not covered.