CN114267310A

CN114267310A - Driving device of Tconless display screen

Info

Publication number: CN114267310A
Application number: CN202111628258.2A
Authority: CN
Inventors: 王衍军; 阮凌毅; 洪鸿榕
Original assignee: TPV Display Technology Xiamen Co Ltd
Current assignee: TPV Display Technology Xiamen Co Ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-04-01

Abstract

The invention relates to a driving device of a Tconless display screen, which comprises a Tconless main board and a switching board, wherein the Tconless main board inputs signals to the switching board and then provides the signals to a Source board to drive the Tconless display screen, the Tconless main board comprises an SOC chip with a built-in T-con function, the switching board comprises a PM chip, a GAMMA chip and a Level Shift chip, the Tconless display screens with different protocols can be supported by the switching board aiming at different P2P protocols by adopting the technical scheme, the Tconless main board can be repeatedly used, the Tconless main board does not need to be repeatedly designed aiming at the main board, and the aim of reducing the whole design cost is fulfilled.

Description

Driving device of Tconless display screen

Technical Field

The invention relates to the field of liquid crystal display, in particular to a driving device of a Tconless display screen.

Background

With the increasing market demand of liquid crystal display screens and the increasing maturity of technology and technology, the traditional method of the liquid crystal display screen is driven by a main board, a T-con board and a left Source board and a right Source board (Source board) together, and the T-con board is provided with a plurality of important integrated chips such as T-con IC, PMIC, P-GAMMA IC, Level Shift IC and the like; however, the conventional main board, the T-con board, the left Source board and the right Source board are designed separately, and the design scheme of multiple ICs on the T-con board not only has more material elements, complex circuits and structures, but also has large transmission loss of signals and voltages and high production cost.

In order to reduce the cost of Tconless mainboard birth, only the Tconless mainboard and the left and right Source plates (Source plates) are required to drive the liquid crystal display screen together, and data signals, Gamma, VCOM and Timing driving signals required by different liquid crystal display screens are directly output to the Source plates, but the data signals, Gamma, VCOM and driving signals supported by different Tconless display screens have different definitions of interfaces, so that different Tconless mainboards are required for matching different Tconless display screens, and have poor universality and cannot be compatible with different Tconless display screens.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a driving device of a Tconless display screen, which aims at Gamma, VCOM and Timing driving signals and interfaces required by the Tconless display screen, designs a special adapter plate, and can support the Tconless display screen with different protocols by matching with a main board.

The invention relates to a driving device of a Tconless display screen, which adopts the following technical scheme: the system comprises a Tconless mainboard and a patch panel, wherein the Tconless mainboard inputs signals to the patch panel and then provides the signals to a Source panel to drive a Tconless display screen, the Tconless mainboard comprises an SOC chip with a built-in T-con function, and the patch panel comprises a PM chip, a GAMMA chip and a Level Shift chip; the P2P video differential signal output by the Tconless mainboard is directly provided to the Source board through the adapter board; the Tconless mainboard outputs a control signal and a power supply signal to the PM chip, the PM chip generates VCOM voltage, VGH voltage, VGL voltage, AVDD voltage and HAVDD voltage, and the GAMMA chip generates GAMMA voltage under the action of the AVDD voltage and supplies the GAMMA voltage to the Source board; the Tconless mainboard outputs Timing driving signals, Level shifting is achieved through a Level Shift chip, and the Timing driving signals are provided for the Source board.

Further, the patch panel communicates with the motherboard via an I2C bus.

Further, the Source boards comprise a left Source board and a right Source board.

Furthermore, the Demura SPI signal output by the Tconless main board is directly provided for the left Source board and the right Source board through the adapter board.

Further, the P2P video differential signal is in a CEDS data format.

Further, the SOC chip is an NT72690 chip.

Compared with the prior art, the invention has the beneficial effects that: aiming at Gamma, VCOM and Timing driving signals and interfaces required by different protocol Tconless display screens, a special adapter plate is designed, and is matched with a Tconless mainboard with a built-in T-con chip for use, so that the different protocol Tconless display screens can be supported, the Tconless mainboard with the built-in T-con chip does not need to repeatedly modify the Tconless display screens with different protocols, the universality is strong, and when the different protocol Tconless display screens are matched, the hardware version of the Tconless mainboard can be reduced, the standardization is achieved, and the research and development cost is reduced.

Drawings

The accompanying drawings, which are described herein to provide a further understanding of the application, are included in the following description:

FIG. 1 is a block diagram of the system of the present invention;

fig. 2 is a schematic diagram of the system of the present invention.

Detailed Description

Referring to fig. 1 and fig. 2, a driving apparatus for a Tconless display screen according to an embodiment includes a Tconless main board and a patch board, where the Tconless main board inputs a signal to the patch board and then provides the signal to a Source board to drive the Tconless display screen, the Tconless main board includes an SOC chip with a built-in T-con function, and the patch board includes a PM chip, a GAMMA chip, and a Level Shift chip; the BT output P2P video differential signal is directly provided to a Source board through a patch panel; the Tconless mainboard outputs a control signal and a power supply signal to the PM chip, the PM chip generates VCOM voltage, VGH voltage, VGL voltage, AVDD voltage and HAVDD voltage, and the GAMMA chip generates GAMMA voltage under the action of the AVDD voltage and supplies the GAMMA voltage to the Source board; the Tconless mainboard outputs Timing driving signals, Level shifting is achieved through a Level Shift chip, and the Timing driving signals are provided for the Source board.

Further, the patch panel communicates with the motherboard via an I2C bus.

Further, the P2P video differential signal is in a CEDS data format.

Further, the SOC chip is an NT72690 chip.

The working principle of the invention is as follows: PM chips, Gamma chips and Level Shifter chips on a Tconless mainboard are removed and are provided through independent adapter plates, a Tconless display produces Tconless display screens matched with different protocols, the Tconless mainboard does not need to be modified, and matching of the Tconless display screens with different protocols can be achieved only by changing the adapter plates.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A driving device of a Tconless display screen comprises a Tconless main board and a switching board, wherein the Tconless main board inputs signals to the switching board and then provides the signals to a Source board to drive the Tconless display screen; the P2P video differential signal output by the Tconless mainboard is directly provided to the Source board through the adapter board; the Tconless mainboard outputs a control signal and a power supply signal to the PM chip, the PM chip generates VCOM voltage, VGH voltage, VGL voltage, AVDD voltage and HAVDD voltage, and the GAMMA chip generates GAMMA voltage under the action of the AVDD voltage and supplies the GAMMA voltage to the Source board; the Tconless mainboard outputs Timing driving signals, Level shifting is achieved through a Level Shift chip, and the Timing driving signals are provided for the Source board.

2. The device of claim 1, wherein the switch board communicates with the motherboard via an I2C bus.

3. The device for driving a Tconless display screen according to claim 1, wherein the Source boards include a left Source board and a right Source board.

4. The driving apparatus for a Tconless display screen according to claim 3, wherein said Tconless motherboard outputs Demura SPI signal directly to the left Source board and the right Source board via the adapter board.

5. A drive for a Tconless display screen as claimed in claim 1 wherein said P2P video difference signal is in the CEDS data format.