WO2015085607A1

WO2015085607A1 - Display apparatus

Info

Publication number: WO2015085607A1
Application number: PCT/CN2013/089727
Authority: WO
Inventors: 谭小平; 陈宥烨; 田夏
Original assignee: 深圳市华星光电技术有限公司
Priority date: 2013-12-11
Filing date: 2013-12-17
Publication date: 2015-06-18
Also published as: CN103680446A

Abstract

A display apparatus. The display apparatus is provided with a first printed circuit board and a second printed circuit board. The first circuit board is provided with a storage unit used for storing a parameter needed by a display panel drive signal. The second circuit board is provided with a time sequence controller and a programmable gamma circuit used for receiving a parameter stored by the storage unit. In production, the display panel is bonded with the first printed circuit board first, and then the parameter is written into the storage unit in advance and is set into the first printed circuit board, and then the display panel and the first printed circuit board are connected to the second printed circuit board, and the connection is usually manually implemented. Therefore, by means of the display apparatus, a matching error when the display panel is assembled with the storage unit can be solved.

Description

Display device

Technical field

The present invention provides a display device, and more particularly to a display device that can prevent a display panel from being mismatched with a printed circuit board (PCB) during assembly.

Background technique

In recent years, there has been an increasing demand for large-sized liquid crystal display panels on the market, and the manufacture of liquid crystal display panels has also progressed toward a large size. As the production of the display device is changed from a small size to a large size, the architecture of the display device is also changed. As shown in FIG. 1, the conventional large-size display device 100 has a display panel 110 and a horizontally disposed circuit board that is separately disposed. X-board (hereinafter referred to as first printed circuit board) 130 and control circuit board (C/B) or system control board (SOC) (hereinafter referred to as a second printed circuit board) 140. In production, the display panel 110 is first bonded together by the flexible printed circuit board 180 and the first printed circuit board 130, after which the display panel 110 and the first printed circuit board 130 pass through the serial data line (SDA). A patch (not shown) of a string clock line (SCL) is connected to the second printed circuit board 140, which is typically done manually.

In the existing large-sized display device, the second printed circuit board 140 is usually configured with a programmable gamma circuit (Programmable) Gamma IC) 160, timing controller (Timing Controller 170 and storage unit 151/152. The programmable gamma circuit 160 is for adjusting the gamma (GAMMA) parameters passed to the drive circuit 120, and the gamma parameters are stored in the memory unit 151 within the programmable gamma circuit 160 (eg, EEPROM); the timing controller 170 is for processing control of the timing of the driving signals delivered to the driving circuit 120, and the timing controller 170 is for processing the display panel 110 according to the parameters related to the optical characteristics specific to each of the display panels 110. Control, the related parameters include an over-driver table, a chromaticity table, and a grayscale adjustment (de-mura) table, and the above parameters are stored in a storage unit 152 (such as an EEPROM).

The above parameters may be slightly different in optical characteristics and precision of each display panel 110. Therefore, each display panel 110 has its corresponding corresponding parameter table, and the parameter table is stored in the programmable gamma. The memory unit 151 in the circuit 160 and the memory unit 152 corresponding to the timing controller 170 are inside.

First printed circuit board The function of 130 is to transfer the signal of the second printed circuit board 140 to the inside of the drive circuit 120. The driving circuit 120 is generally disposed at a boundary between the display panel 110 and the first printed circuit board 130.

In the manufacturing process of the large-sized display device 100, after the display panel 110 is combined with the driving circuit 120, the driving circuit 120 is combined with the first printed circuit board 130, and then the above-described storage is performed in the storage unit 151. The parameters in /152, and the relevant parameters obtained by the test are written in advance to the corresponding second printed circuit board 140.

Each display panel 110 has its second matching printed circuit board 140, but as the division of production and manufacturing becomes more and more refined, the display panel 110 and the second printed circuit board 140 may be produced and manufactured in different places. , so the relevant parameters are written to the storage unit 151 of the second printed circuit board 140 / In the case of 152, the second printed circuit board 140 needs to be labeled and matched with the corresponding display panel 110. Then, when assembling, the corresponding second printed circuit board 140 and the display panel 110 need to be matched and assembled according to the indication, but Once the assembly error occurs, the display effect of the liquid crystal panel 110 may be greatly deviated, so it is necessary to propose a solution to improve the display effect caused by the above assembly error.

technical problem

A main object of the present invention is to provide a display device that stores a memory cell in which an optical characteristic related parameter table corresponding to a display panel is stored on a first printed circuit board connected to a driving circuit, and a second printing The circuit board is only used to receive parameters in the storage unit to solve the problem that the second printed circuit board and the first printed circuit board and the display panel are assembled incorrectly, resulting in poor display performance.

Technical solution

The technical solution of the present invention is as follows:

A display device, comprising: a display panel having a plurality of pixels; a driving circuit for generating a plurality of driving signals to drive a plurality of pixels in the display panel; a circuit board, the first circuit board is electrically connected to the driving circuit, and the first circuit board has a storage unit for storing parameters required for driving a plurality of pixels in the display panel; a second circuit board electrically connected to the first circuit board for receiving parameters stored by the storage unit, and the second circuit board having a programmable gamma circuit and a timing a controller and an internal integrated circuit, wherein the timing controller is coupled between the memory unit and the programmable gamma circuit, the timing controller receives parameters of a portion of the memory unit, and the programmable The gamma circuit receives parameters of another portion of the memory cell through the timing controller; the programmable gamma circuit passes a portion of the memory cell through the internal integrated circuit Receiving gamma parameters to the programmable circuit; and the internal integrated circuit is provided inside the programmable gamma circuit.

Another object of the present invention is to provide a display device, comprising: a display panel having a plurality of pixels; and a driving circuit for generating a plurality of driving signals for driving the display panel a plurality of pixels; a first circuit board, the first circuit board is electrically connected to the driving circuit, the first circuit board has a storage unit for storing and driving a plurality of pixels in the display panel a required parameter; and a second circuit board electrically connected to the first circuit board for receiving parameters stored by the storage unit.

According to an aspect of the invention, the second circuit board has a programmable gamma circuit coupled to the memory unit for receiving a parameter of a portion of the memory unit for providing The drive circuit generates a drive signal.

According to another aspect of the present invention, the second circuit board has a programmable gamma circuit and a timing controller, wherein the programmable gamma circuit is coupled to the memory unit for receiving the memory unit a portion of the parameters; and the timing controller is coupled to the storage unit for receiving parameters of another portion of the storage unit.

In the above display device, the second circuit board has an internal integrated circuit, and the programmable gamma circuit receives a parameter of a part of the memory unit to the programmable gamma through the internal integrated circuit Circuit.

In the above display device, the internal integrated circuit is disposed inside the programmable gamma circuit.

According to another aspect of the invention, the second circuit board has a timing controller coupled to the memory unit for receiving parameters of a portion of the memory unit for providing the drive circuit to generate a drive signal.

According to another aspect of the present invention, the second circuit board has a programmable gamma circuit and a timing controller, wherein the timing controller is connected between the memory unit and the programmable gamma circuit, The timing controller receives a parameter of a portion of the memory unit, and the programmable gamma circuit receives a parameter of another portion of the memory unit through the timing controller.

According to another aspect of the present invention, the parameter stored by the storage unit includes at least one of a gamma table, an overdrive table, a chromaticity table, and a grayscale adjustment table.

Beneficial effect

It is an object of the present invention to provide a display device that can solve the assembly mismatch between the display panel and the second printed circuit board. Compared with the prior art, the present invention sets a storage unit storing an optical characteristic related parameter table corresponding to a display panel on a first printed circuit board connected to a driving circuit, and the second printed circuit board is only used to receive the storage. The parameters in the unit thus solve the problem that the second printed circuit board and the display panel are mismatched during assembly.

DRAWINGS

Figure 1 is a prior art display device;

Figure 2 is a first embodiment of the present invention;

Figure 3 is a second embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

In the present specification, the use of the terms "a", "an", etc. does not denote a limitation of the quantity,

2 is a display device 200 according to an embodiment of the invention. The display device 200 includes a display panel 210, a first printed circuit board 230, and a second printed circuit board 240. The first printed circuit board 230 A memory unit 250 is disposed on the second printed circuit board 240, and a programmable gamma circuit 260, a timing controller 270, and an internal integrated circuit 261 are disposed. The display panel 210 is bonded by a flexible printed circuit board 280 and a first printed circuit board 230, after which the display panel 210 and the first printed circuit board 230 pass through a serial data line (SDA) and a string. A wiring (not shown) of a clocked line (SCL) is connected to the second printed circuit board 240. This connection is usually done manually. The flexible printed circuit board 280 is provided with a driving circuit 220 for providing driving signal transmission. To a plurality of signal lines (not shown) in the display panel 210.

Since each display panel has some differences in optical characteristics and precision, each display panel has its own corresponding parameter table, such as: gamma table, overdrive table, chromaticity table, grayscale adjustment table, etc. And the parameter table is stored in the above-mentioned storage unit 250. In general, the parameter table is pre-written in the memory unit 250, and then the memory unit 250 is disposed on the first printed circuit board 230, and the programmable gamma circuit 260 and the timing controller are 270 is disposed on the second printed circuit board 240. At the time of manufacture, the display panel 210 is combined with the first printed circuit board 230 by the flexible printed circuit board 280, and then the memory unit 250 is pre-written with parameters and disposed on the first printed circuit board 230, and then the display panel 210 The first printed circuit board 230 is further coupled to the second printed circuit board 240 via a patch cord (not shown) of the serial data line and the serial clock line. This connection is typically done manually. According to the configuration of the present invention, the memory unit 250 in which parameters are written in advance is disposed on the first printed circuit board 230, and therefore, the problem that the second printed circuit board 240 and the display panel 210 are mismatched does not occur at the time of assembly.

According to the above, the driving process of the display panel 110 is such that the internal integrated circuit 261 in the second printed circuit board 240 receives the parameters of a part of the memory unit 250 through a set of serial data lines and serial clock lines 291. The programmable gamma circuit 260, and the timing controller 270 receives parameters of another portion of the memory unit 250 through another set of serial data lines and serial clock lines 292. The programmable gamma circuit 260 and the timing controller 270 adjust respective received parameters. After adjusting the parameters, the second printed circuit board 240 transmits a signal to the first printed circuit board 230. The first printed circuit board 230 The signal received from the second printed circuit board 240 is transferred to the inside of the driving circuit 220. Then, the driving circuit 220 supplies driving signals to a plurality of signal lines (not shown) in the display panel 210 to drive the display panel 210. The pixels are displayed.

According to an embodiment of the present invention, it can be understood that the display device extended according to special needs, for example, only the timing controller 270 or the programmable gamma circuit 260 on the second printed circuit board 240, similarly, such The display device is equally applicable to the technical method of the present invention.

The display device 300 of the second embodiment of the present invention is substantially similar to the first embodiment. As shown in FIG. 3, the second printed circuit board 340 is provided with a programmable gamma circuit 360, a timing controller 370, and an internal integration. Circuit 361, wherein timing controller 370 is coupled between memory unit 350 and programmable gamma circuit 360. The timing controller 370 receives parameters of a portion of the memory unit 350 through a set of serial data lines and a serial clock line 391 to an internal integration circuit 361, which in turn passes another set of string data. Line and string clock lines 392 receive parameters passed via the timing controller 370 to the programmable gamma circuit 360. According to the above, the programmable gamma circuit 360 obtains the desired parameters, and the timing controller 370 can read the programmable gamma circuit 360 and the timing controller from the storage unit 350 at one time. 370 required parameters, the timing controller 370 then actively sends parameters to the programmable gamma circuit 360; or, when the programmable gamma circuit 360 requests to obtain parameters, the timing control The controller 370 reads the parameters of a portion of the memory unit 350 separately, and the timing controller 370 sends the parameters to the programmable gamma circuit 360. After the timing controller 370 and the programmable gamma circuit 360 receive the parameters of the storage unit 350, the subsequent process of driving the display panel 310 is as in the above embodiment.

Although the exemplary embodiments of the present invention have been described, it is understood that the invention is not limited to these exemplary embodiments, and any modifications made by those skilled in the art are within the spirit and scope of the present invention. And equivalent replacements, improvements, etc., are intended to be included within the scope of the appended claims.

Embodiments of the invention

Industrial applicability

Sequence table free content

Claims

A display device, characterized in that the display device comprises:

a display panel having a plurality of pixels;

a driving circuit for generating a plurality of driving signals to drive a plurality of pixels in the display panel;

a first circuit board, the first circuit board is electrically connected to the driving circuit, and the first circuit board has a storage unit for storing parameters required for driving a plurality of pixels in the display panel; as well as

a second circuit board electrically connected to the first circuit board for receiving parameters stored by the storage unit, and the second circuit board having a programmable gamma circuit, a timing controller and an internal integrated circuit, wherein

The timing controller is coupled between the memory unit and the programmable gamma circuit, the timing controller receives a parameter of a portion of the memory unit, and the programmable gamma circuit passes the timing controller Receiving parameters of another portion of the storage unit;

The programmable gamma circuit receives a parameter of a portion of the memory cell to the programmable gamma circuit through the internal integrated circuit;

The internal integrated circuit is disposed inside the programmable gamma circuit.
A display device, characterized in that the display device comprises:

a display panel having a plurality of pixels;

a driving circuit for generating a plurality of driving signals to drive a plurality of pixels in the display panel;

a first circuit board, the first circuit board is electrically connected to the driving circuit, and the first circuit board has a storage unit for storing parameters required for driving a plurality of pixels in the display panel; as well as

a second circuit board electrically connected to the first circuit board for receiving parameters stored by the storage unit.
The display device according to claim 2, wherein said second circuit board has a programmable gamma circuit, said programmable gamma circuit being coupled to said memory unit for receiving said memory unit A portion of the parameters are used to provide the drive circuit to generate a drive signal.
The display device according to claim 2, wherein said second circuit board has a programmable gamma circuit and a timing controller, wherein said programmable gamma circuit is coupled to said memory unit for Receiving a parameter of a portion of the storage unit; and the timing controller is coupled to the storage unit for receiving a parameter of another portion of the storage unit.
The display device according to claim 4, wherein said second circuit board has an internal integrated circuit, and said programmable gamma circuit passes a parameter of a part of said memory unit through said internal integrated circuit Received to the programmable gamma circuit.
The display device according to claim 5, wherein said internal integrated circuit is disposed inside said programmable gamma circuit.
The display device according to claim 2, wherein said second circuit board has a timing controller coupled to said memory unit for receiving a parameter of a portion of said memory unit for providing said driving circuit Generate a drive signal.
The display device according to claim 2, wherein said second circuit board has a programmable gamma circuit and a timing controller, wherein said timing controller is coupled to said memory unit and said programmable Between the gamma circuits, the timing controller receives parameters of a portion of the memory unit, and the programmable gamma circuit receives parameters of another portion of the memory unit through the timing controller.
The display device according to claim 8, wherein said second circuit board has an internal integrated circuit, and said programmable gamma circuit passes a parameter of a part of said memory unit through said internal integrated circuit Received to the programmable gamma circuit.
The display device according to claim 9, wherein said internal integrated circuit is disposed inside said programmable gamma circuit.
The display device according to claim 2, wherein the parameter stored in the storage unit comprises at least one of a gamma table, an overdrive table, a chromaticity table, and a grayscale adjustment table.