CN-115691438-B - TFT liquid crystal module power supply chip, display panel and electronic terminal

Abstract

The TFT liquid crystal module power supply chip comprises an input pin and at least two output pin groups, wherein the at least two output pin groups respectively supply power for a backlight source and supply power for a liquid crystal display driving chip. The technical scheme of the invention can reduce the area of the power chip of the TFT liquid crystal module and improve the performance of the chip.

Inventors

• MA XIAOKANG

Assignees

• 格科微电子（上海）有限公司

Dates

Publication Date

20260512

Application Date

20210729

Claims (8)

1. 1. A TFT liquid crystal module power chip, comprising: An input pin; the LED driving circuit comprises at least two output pin groups, wherein the at least two output pin groups respectively supply power for a backlight source and supply power for a liquid crystal display driving chip; at least two groups of control units for respectively controlling the output voltages of the at least two output pin groups; The at least two output pin groups comprise a first output pin group, a second output pin group, a first output pin group and a second output pin group, wherein the first output pin group comprises an output voltage pin for supplying power to the backlight light source and an interface pin; The input pin comprises an enabling pin, a first output pin group and a second output pin group, wherein the enabling pin is used for accessing a pulse signal and controlling the first output pin group to supply power for the backlight lamp source; the register is used for controlling the first voltage output pin and the second voltage output pin to output power supply signals to the liquid crystal display driving chip, and the output voltages of the first voltage output pin and the second voltage output pin are the opening and closing voltages of the liquid crystal display driving chip.
2. 2. The TFT LCD module power chip of claim 1, wherein the TFT LCD module power chip comprises a plurality of TFTs, The first output pin group further comprises a feedback pin; The second output pin group includes an open voltage output pin and a shut voltage output pin.
3. 3. The TFT liquid crystal module power chip of claim 2, wherein said turned-on voltage output pin outputs a voltage in the range of 10-25V, and said turned-off voltage output pin outputs a voltage in the range of-10-25V.
4. 4. The TFT liquid crystal module power chip of claim 2, wherein said turn-on voltage output pin is coupled to a first input pin of said liquid crystal display driver chip and said turn-off voltage output pin is coupled to a second input pin of said liquid crystal display driver chip.
5. 5. The TFT liquid crystal module power chip of claim 1, comprising: And the at least two groups of control units respectively control the output voltages of the at least two output pin groups.
6. 6. The TFT liquid crystal module power chip of claim 1, wherein said input pins further comprise: The input control pin is used for accessing an input control signal, and the voltage value of the input control signal is in a preset range; A ground pin.
7. 7. A display panel comprising the TFT liquid crystal module power chip of any one of claims 1 to 6.
8. 8. An electronic terminal comprising the TFT liquid crystal module power chip of any one of claims 1 to 6.

Description

TFT liquid crystal module power supply chip, display panel and electronic terminal Technical Field The invention relates to the technical field of display, in particular to a TFT (thin film transistor) liquid crystal module power supply chip, a display panel and an electronic terminal. Background As one of the important core foundations of the electronic information industry, the future substitutes of the traditional kinescope technology, the liquid crystal display technology plays an important role in promoting the transformation of economic development modes, promoting the optimization and upgrading of industrial structures, driving the development of high and new technologies and the like. A thin film transistor (Thin Film Transistor, TFT) Liquid crystal display (Liquid CRYSTAL DISPLAY, LCD) is one of active matrix type Liquid crystal displays (AM-LCDs). The liquid crystal flat panel display, especially TFT-LCD, is the only display device that catches up with and exceeds the Cathode Ray Tube (CRT) display comprehensively in terms of comprehensive properties such as brightness, contrast, power consumption, life-span, volume and weight at present, its performance is fine, the large-scale production characteristic is good, the degree of automation is high, the raw materials cost is cheap, the development space is wide, will become the mainstream product of the new century rapidly. In the prior art, a TFT liquid crystal module comprises a TFT liquid crystal panel, a backlight layer, a backlight Light-Emitting Diode (LED) power supply driving chip, a power supply chip of a liquid crystal display driving chip and a liquid crystal display driving chip. The backlight LED backlight power supply driving chip and the power supply chip are arranged on the mobile phone main board. However, the driving signals of the TFT-LCD are very complex, and the peripheral control circuit is also complex, so how to reduce the area of the power chip of the TFT liquid crystal module and improve the performance of the chip is a technical problem to be solved. Disclosure of Invention The invention solves the technical problem of how to reduce the area of a power chip of a TFT liquid crystal module and improve the performance of the chip. In order to solve the technical problems, the embodiment of the invention provides a TFT liquid crystal module power supply chip, which comprises an input pin and at least two output pin groups, wherein the at least two output pin groups respectively supply power for a backlight source and a liquid crystal display driving chip. Optionally, the at least two output pin groups comprise a first output pin group comprising an output voltage pin and a feedback pin for supplying power to the backlight power supply, and a second output pin group comprising an on voltage output pin and an off voltage output pin for supplying power to the liquid crystal display driving chip. According to the alternative, the voltage range output by the opening voltage output pin is 10-25V, and the voltage range output by the closing voltage output pin is-10-25V. Optionally, the at least two output pin groups comprise a first output pin group, including an output signal pin and an interface pin, for supplying power to the backlight power supply, and a second output pin group, including a first voltage output pin and a second voltage output pin, for supplying power to the liquid crystal display driving chip, wherein the value of the first voltage is smaller than that of the second voltage. Optionally, the TFT LCD module power chip comprises a register for controlling the first voltage output pin and the second voltage output pin to output power supply signals to the LCD driving chip. Optionally, the turn-on voltage output pin is coupled to a first input pin of the liquid crystal display driving chip, and the turn-off voltage output pin is coupled to a second input pin of the liquid crystal display driving chip. Optionally, the TFT liquid crystal module power supply chip comprises at least two groups of control units for respectively controlling the output voltages of the at least two output pin groups. Optionally, the input pins comprise input control pins for accessing input control signals, enabling pins for accessing pulse signals, controlling the output pin group to supply power for the backlight source, and grounding pins. The embodiment of the invention also provides a display panel, which comprises the TFT liquid crystal module power supply chip. The embodiment of the invention also provides an electronic terminal, which comprises the TFT liquid crystal module power supply chip. Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects: In the technical scheme of the invention, the TFT liquid crystal module power supply chip comprises an input pin and at least two output pin groups, wherein the at least two output pin groups respectively supply power for a ba