GTT70A-TPC-BLM-B0-H1-C4-VPT

Series:	GTT
Part Status:	Active
Display Type:	TFT - Color
Display Mode:	Transmissive
Touchscreen:	Capacitive
Diagonal Screen Size:	7" (177.80mm)
Viewing Area:	155.08mm W x 86.92mm H
Backlight:	--
Dot Pixels:	800 x 480
Interface:	RS-422
Graphics Color:	Red, Green, Blue (RGB)
Background Color:	--
Dot Size:	--
Dot Pitch:	0.19mm W x 0.18mm H

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GTT70A-TPC-BLM-B0-H1-C4-VPT Application Field and Working Principle

IntroductionThe GTT70A-TPC-BLM-B0-H1-C4-VPT (GTT70) is a passive-matrix LCD (liquid crystal display) module that is designed to be used as an input device in embedded systems of varying types. The GTT70 produces a backlight module, with RGB (red-green-blue) LED (light-emitting diode) that produces a white light source. The LCD module is also provided with a TFT (thin-film transistor) panel that uses a liquid crystal material placed between two glass substrates. The input voltage (Vin) for the GTT70 should be between 5 VDC and 13 VDC. ApplicationThe GTT70 is suitable for applications where a passive-matrix LCD display is needed. Examples of such applications include car stereos, navigation systems, medical imaging systems, medical instrumentation systems, point-of-sale systems, and factory production displays. The compact size and low power consumption of this module make it an ideal choice for designing these kinds of systems.Working PrinciplesThe LCD panel of GTT70 is made up of a layer of liquid crystal material sandwiched between two glass substrates. The glass substrates are coated with a pattern of transparent electrodes that form the pixels of the LCD display. When a voltage is applied across the electrodes, some of the liquid crystal molecules line up in the direction of the electric field, and the light passing through the display is polarized and scattered. This causes the display pixels to appear bright or dark, depending on the polarity and magnitude of the applied voltage.The backlight module of the GTT70 produces a white light source that is used to make the display readable. The light source is a combination of red, green, and blue light-emitting diodes (LEDs). The intensity of the light is controlled via a pulse-width modulation (PWM) algorithm, which can be adjusted to the user\'s needs.The GTT70 is also equipped with a built-in controller, which monitors the display and sets the necessary voltages for the LCD panel. This is achieved through the use of a tiny integrated circuit (IC) that controls the voltage applied to the transparent electrodes as well as the timing sequence for the data exchange.ConclusionThe GTT70A-TPC-BLM-B0-H1-C4-VPT is a passive-matrix LCD module that is suitable for various embedded systems, ranging from car radios and navigation systems to medical instrumentation and production displays. The LCD module is enabled with a backlight module with RGB LEDs for a crisp display, a TFT LCD panel, and an integrated controller for automatic monitor adjustment and data exchange.

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