CN2679786Y

CN2679786Y - Control chip of LED panel

Info

Publication number: CN2679786Y
Application number: CNU2004200381147U
Authority: CN
Inventors: 温建荣
Original assignee: RONGKE ELECTRONICS CO Ltd YANTAI
Current assignee: RONGKE ELECTRONICS CO Ltd YANTAI
Priority date: 2004-01-13
Filing date: 2004-01-13
Publication date: 2005-02-16
Anticipated expiration: 2014-01-13

Abstract

The control chip of LED panel of the utility model comprises the chip body (1) which is provided with the base pins (2) in the circumference of the chip body and is characterized in that the base pins (2) including the base pins DNI, RSI, GDI, BDI, CKI, CKO, DNO, RSO, GDO, BDO, R 1-R32, G1-G32, B1-B32, SCLR, SCT1-SCT5, VCC, GND, TS and the base pins DNI, RSI, GDI, BDI, CKI, CKO, DNO, RSO, GDO, BDO, R1-R32, G1-G32, B 1-B32, SCLR, SCT1-SCT5 connect with the corresponding modules; the modules comprise a parameter interception module, a cascading output module, bunch movable data modules (A, B, C), a nonlinear parameter interception module, a line count enable module, a step generating module, a column output enabled die block, a nonlinear parameter select module, a brightness adjusting module, a line-scan controlled module, column output modules (A, B, C), the 256*8SRAM, the 8192 non-linear module, the VCC base pin connected with the power source and the GND base pin connected with the earth. The utility model lessens the number of the display screen devices and the connecting pieces, which makes the display screen have the stable performance, intelligible picture pattern, low failure rate and various functions.

Description

The LED display control chip

(1) technical field: the utility model relates to a kind of LED display control chip, belongs to the LED display field.

(2) background technology: in order to improve LED display picture quality, people adopt control chip to set up different brightness and gray scale corresponding relation, make the beholder can obtain to be fit to the optimized image gray-level and the brightness contrast relation of human eye characteristic, present LED display preferably is type products such as the Japanese TB62726 of Toshiba, this series products is to seal in the control mode that spreads out of because of what adopt, thereby retrained the embodiment of the display screen grey grade of made, do not reach desirable refresh rate, and need complicated control system, control panel is various, the plug connector complexity, cause the poor stability of display screen, the failure rate height, and some domestic special integrated circuits such as ZQ9702 also must depend on the like products such as TB62726 of serial.

(3) summary of the invention: the purpose of this utility model is to provide a kind of speed height, and energy true reappearance picture quality reduces display screen components and parts and plug connector quantity, make display screen performance stable, clear picture, failure rate is low, the LED display control chip of diverse in function.

The purpose of this utility model can reach by following measure: the LED display control chip, it comprises chip body 1, be provided with pin two around the chip body 1, it is characterized in that pin two comprises pin DNI, RSI, GDI, BDI, CKI, CKO, DNO, RSO, GDO, BDO, R1-R32, G1-G32, B1-B32, SCLR, SCT1-SCT5, VCC, GND, TS, pin DNI, RSI, GDI, BDI, CKI connects the parameter interception module, the cascade output module, the string shift is according to module (A, B, C), the nonlinear parameter interception module, the parameter interception module connects row count enable module, the step-length generation module, row output enable module, the cascade output module, nonlinear parameter is selected module, the brightness adjusting module, the line scanning control module, row count enable module connects the step-length generation module, the string shift is according to module (A, B, C), row output enable module, the step-length generation module connects row output enable module, the string shift is according to module (A, B, C), row output module (A, B, C), 256*8SRAM, 8192 nonlinear block, the brightness adjusting module, row output enable module, the string shift is according to module (A, B, C), the line scanning control module all connects row output module (A, B, C), the nonlinear parameter interception module connects 256*8SRAM, nonlinear parameter is selected module, nonlinear parameter selects module to connect 256*8SRAM, 8192 nonlinear block, the brightness adjusting module, the cascade output module is taken over pin CKO, DNO, RSO, GDO, BDO, row output module (A, B, C) connect pin R1-R32 respectively, G1-G32, B1-B32, the line scanning control module connects pin SCLR, SCT1-SCT5, the VCC pin connects power supply, GND pin ground connection.

In order further to realize the purpose of this utility model, described step-length generation module comprises step-length counting module and step number counting module, and the step-length counting module links to each other with the step number counting module.

In order further to realize the purpose of this utility model, described pin TS takes over pin GND.

In order to realize that further the purpose of this utility model, control chip adopt 128-PIN QFP packaged type.

The utility model can produce following good effect compared with the prior art: 1, chip is supported cascade, and subtending port is simple, is convenient to system development, provides simple interface to make control system be easy to be grasped and develop by people, helps promoting the use of on a large scale.

2, chip carries out with the parallel way of output the control of luminous point, makes the data-signal of color arrive each luminous point simultaneously.

3, row output high-low level can be selected, and can directly select transistor circuit or all kinds of constant pressure and constant six drives luminotrons for use.

4,96 pigment points of static support, support static to 32 scan modes, support the arbitrary resolution display mode, make the chip cost of indoor display screen (the L ED cell board fabric swatch that this chip adopts 128-PIN QFP to be encapsulated in below the 3.75MM more has superiority) reduce half.

5, support 256 grades of brightness adjustment, do not lose gray scale, the kinematic nonlinearity adjustment is supported in 256 grades of non-linear adjustment of gray scale, can be according to the requirement fine and smooth true to nature on the different fuller realization visual perception of night on daytime and data source.

6, have capable count output signal, need not add counting circuit and just can realize 1/2,1/3,1/4 ... 1/32 display screen complete period scanning, the brightness that under same scan mode, improves display screen.

7, this chip has the kinematic nonlinearity adjustment of 13-16bit gray shade scale, has adopted the scheme of going into earlier and going out, and makes display screen performance stable, clear picture, and failure rate is low, diverse in function.The LED display performance that adopts this chip design to make is more superior.

(4) description of drawings:

Fig. 1 is an appearance assumption diagram of the present utility model;

Fig. 2 is a chip logic block diagram of the present utility model.

(5) embodiment: preferred forms of the present utility model is elaborated below in conjunction with accompanying drawing:

Embodiment: the LED display control chip is (referring to Fig. 1, Fig. 2), it comprises chip body 1, be provided with pin two around the chip body 1, pin two comprises pin DNI, RSI, GDI, BDI, CKI, CKO, DNO, RSO, GDO, BDO, R1-R32, G1-G32, B1-B32, SCLR, SCT1-SCT5, VCC, GND, TS, pin DNI, RSI, GD1, BDI, CKI connects the parameter interception module, the cascade output module, the string shift is according to module (A, B, C), the nonlinear parameter interception module, the parameter interception module connects row count enable module, the step-length counting module, the step number counting module, row output enable module, the cascade output module, nonlinear parameter is selected module, the brightness adjusting module, the line scanning control module, the step-length counting module links to each other with the step number counting module, row count enable module connects the step-length counting module, the step number counting module, the string shift is according to module (A, B, C), row output enable module, the step-length counting module, the step number counting module connects row output enable module respectively, the string shift is according to module (R, G, B), row output module (A, B, C), 256*8SRAM, 8192 nonlinear block, the brightness adjusting module, row output enable module, the string shift is according to module (A, B, C), the line scanning control module all connects row output module (A, B, C), the nonlinear parameter interception module connects 256*8SRAM, nonlinear parameter is selected module, nonlinear parameter selects module to connect 256*8SRAM, 8192 nonlinear block, the brightness adjusting module, the cascade output module is taken over pin CKO, DNO, RSO, GDO, BDO, row output module (A, B, C) connect pin R1-R32 respectively, G1-632, B1-B32, the line scanning control module connects pin SCLR, SCT1-SCT5, the VCC pin connects power supply, GND pin ground connection, pin TS takes over pin GND.Control chip adopts 128-PIN QFP packaged type.

Be explanation below to pin:

CKI chip operation clock input signal, rising edge is effective;

DNI chip line period indication cascade input signal;

RSI is provided with data/A group video data cascade input signal (A group video data can be used as redness (parameter) data and also can be other);

GDI is provided with data/B group video data cascade input signal (B group video data can be used as green (parameter) data and also can be other);

BDI C group video data cascade input signal (C group video data can be used as blueness (parameter) data and also can be other);

R1-R32 A group video data row output signal;

61-632 B group video data row output signal;

B1-B32 C group video data row output signal;

The capable count output signal of SCT1-SCT5;

SCLR horizontal reset signal;

CKO chip cascade clock output signal, rising edge is effective;

DNO chip line period indication cascade output signal;

RSO is provided with data/A group video data cascade output signal;

GDO is provided with data/B group video data cascade output signal;

BDO C group video data cascade output signal;

The VCC chip power;

GND chip ground;

During the TS operate as normal, pin is vacant or meet GND.

Claims

1, the LED display control chip, it comprises chip body (1), be provided with pin (2) around the chip body (1), it is characterized in that pin (2) comprises pin DNI, RSI, GDI, BDI, CKI, CKO, DNO, RSO, GDO, BDO, R1-R32, G1-G32, B1-B32, SCLR, SCT1-SCT5, VCC, GND, TS, pin DNI, RSI, GDI, BDI, CKI connects the parameter interception module, the cascade output module, the string shift is according to module (A, B, C), the nonlinear parameter interception module, the parameter interception module connects row count enable module, the step-length generation module, row output enable module, the cascade output module, nonlinear parameter is selected module, the brightness adjusting module, the line scanning control module, row count enable module connects the step-length generation module, the string shift is according to module (A, B, C), row output enable module, the step-length generation module connects row output enable module, the string shift is according to module (A, B, C), row output module (A, B, C), 256*8SRAM, 8192 nonlinear block, the brightness adjusting module, row output enable module, the string shift is according to module (A, B, C), the line scanning control module all connects row output module (A, B, C), the nonlinear parameter interception module connects 256*8SRAM, nonlinear parameter is selected module, nonlinear parameter selects module to connect 256*8SRAM, 8192 nonlinear block, the brightness adjusting module, the cascade output module is pressed pin CKO, DNO, RSO, GDO, BDO, row output module (A, B, C) connect pin R1-R32 respectively, G1-G32, B1-B32, the line scanning control module connects presses pin SCLR, SCT1-SCT5, the VCC pin connects power supply, the GND pin is by ground.

2, LED display control chip according to claim 1 is characterized in that described step-length generation module comprises step-length counting module and step number counting module, and the step-length counting module links to each other with the step number counting module.

3, LED display control chip according to claim 1 is characterized in that described pin TS takes over pin GND.

4, LED display control chip according to claim 1 is characterized in that control chip adopts 128-PIN QFP packaged type.