CN203276791U

CN203276791U - Brightness and chrominance correction system of LED display screen

Info

Publication number: CN203276791U
Application number: CN2013202863815U
Authority: CN
Inventors: 何海燕
Original assignee: Wuxi Chongan District Technology Innovation Service Center
Current assignee: Wuxi Chongan District Technology Innovation Service Center
Priority date: 2013-05-23
Filing date: 2013-05-23
Publication date: 2013-11-06
Anticipated expiration: 2023-05-23

Abstract

The utility model discloses a brightness and chrominance correction system of an LED display screen. The brightness and chrominance correction system comprises an LED controller, an LED display screen, a data acquisition module, a PC, a data transmission module, a point-by-point correction module and an alarm module. The data acquisition module transmits acquired original pixel parameters of a working menu of the LED display screen to the PC, and the PC transmits the original pixel parameters to the point-by-point correction module through the transmission module. The original pixel parameters are corrected by the point-by-point correction module and then are transmitted to the LED controller. The corrected data are processed by the LED controller and then are transmitted to the LED display screen to be displayed, and the processed result information is transmitted to the PC to be displayed at the same time. When the LED controller fails, alarm information is sent out through the alarm module. The system can be applied to brightness and chrominance correction of a low-level IC display screen, and has the advantages of good versatility and high reliability.

Description

A kind of LED display YC corrective system

Technical field

The utility model relates to LED to be used and control field, is specifically related to a kind of LED display YC corrective system.

Background technology

LED display is comprised of a large amount of light emitting LED lamp, and these LED lamps are in manufacturing process, and the consistance of YC is restive, causes LED display in production and use procedure, the phenomenon of color and brightness irregularities can occur.Along with the prolongation of service time, its performance is also constantly changing, and the visual effect of LED display becomes very poor.In addition, in the working service process, need to change malfunctioning module, because the LED lamp YC of different batches also exists larger difference, therefore, the inconsistent phenomenon of display screen color and brightness can occur.domestic many companies have also released pointwise correction brightness system and have solved this problem, yet these systems design for the state-of-the art high-side driver IC that controls with PWM, the display screen of controlling for the common drive IC of consumption maximum on market, the domestic system that still there is no to support low side IC pointwise correction brightness simultaneously and colourity, only has at present the external point-to-point correction system of minority, can accomplish simultaneously the pointwise correction of brightness and colourity, and the price of this cover system own is high, utilize the each required expense of this system compensation also very high, limited widely its application.

Summary of the invention

Technical problem to be solved in the utility model is: a kind of LED display YC corrective system is provided, the common IC that supports high-side driver IC display screen and market to use in a large number drives the pointwise correction of display screen, native system efficiently solves the problem of LED display YC inequality, greatly reduce and produce and maintenance cost, satisfy numerous LED screen user's demand, promote the development of industry, greatly improve industry level and Chinese LED display in the competitive power of international market.

The utility model adopts following technical scheme for solving the problems of the technologies described above:

A kind of LED display YC corrective system comprises LED controller, LED display, data acquisition module, PC, data transmission module, pointwise correction module, alarm module; Wherein, data acquisition module comprises camera, the YC tester that is connected with PC respectively; The camera lens of described camera, the relative LED display setting respectively of YC tester; Described PC is connected with data transmission module, LED controller respectively; Described pointwise correction module is connected with data transmission module, LED controller respectively; Described LED controller is connected with LED display, alarm module respectively.

Described pointwise correction module comprises FPGA, Video Decoder, video encoder, memory module; Wherein FPGA is connected with Video Decoder, video encoder, memory module respectively; Described Video Decoder, video encoder are connected with described data transmission module by DVI, HDMI data line; Described FPGA is connected with described data transmission module by the usb data line.

Described YC tester comprises optical sensor, color temperature sensor.

Described camera is the technical grade mm professional camera special.

Compared with prior art, the beneficial effect that has of the utility model is:

The utility model corrective system, do not rely on the LED controller hardware system, support the conversion of several data form, complete the YC of the LED display of utilizing general purpose I C driving and proofread and correct, the product maintenance that the product that is applicable to manufacture is proofreaied and correct and used for a long time.

Native system is proofreaied and correct the LED display individual element, and efficient is high, the brightness of display screen colourity high conformity after correction, and the correction data real-time storage, reliability is high.

Description of drawings

Fig. 1 is the utility model block diagram of system.

Embodiment

Be elaborated below in conjunction with the technical scheme of drawings and Examples to utility model:

As shown in Figure 1, the utility model comprises LED controller, LED display, data acquisition module, PC, data transmission module, pointwise correction module, alarm module; Wherein, data acquisition module comprises camera, the YC tester that is connected with PC respectively; The camera lens of described camera, the relative LED display setting respectively of YC tester; Described PC is sent to LED display with original video information by controller and shows, described camera, YC tester gather the original pixels parameter of LED display work picture, and the original pixels parameter that collects is transferred to PC, described PC is vision signal, YC parameter, order data with the original pixels parameter decomposition, and transfers to the pointwise correction module by transport module; Described vision signal is transmitted by DVI, HDMI data line; Described chroma luminance parameter, order data transmit by the usb data line; After described pointwise correction module is processed the original pixels parameter, the data after being proofreaied and correct, and the data after proofreading and correct are sent to LED controller; Described LED controller is to original video data and after the data after proofreading and correct process, data after processing are sent to LED display to be shown, simultaneously processing result information is sent to PC and shows, LED controller breaks down, and sends warning message by alarm module.

Described pointwise correction module comprises FPGA, Video Decoder, video encoder, memory module; Wherein FPGA is connected with Video Decoder, video encoder, memory module respectively; Described Video Decoder receiving video signals, be that binary code inputs to FPGA with video signal decompression, FPGA carries out individual element according to the YC parameter of receiving, order data to the vision signal after decompressing and proofreaies and correct, then the data after proofreading and correct transfer to LED controller after by video encoder encodes, the data after storage is proofreaied and correct simultaneously.

Described YC tester comprises optical sensor, color temperature sensor; Wherein optical sensor is used for the brightness of test LED display, and color temperature sensor is used for the colourity of test LED display.

Principle of work of the present utility model and process are as follows:

Adopt technical grade high-performance professional camera and YC tester as colourity and brightness acquisition hardware, gather screen body raw data, keep camera to be positioned at the dead ahead of screen, regulate camera heights, make camera aim at screen center.Guarantee that the YC data that collect are undistorted.

The raw data that collects is sent to PC, PC is processed raw data, use level and smooth iteration recursive algorithm, the computing correction coefficient, form the brightness correction parameter of each point of LED display, each point brightness is substantially equal to evenly, and the correction parameter table of each point is deposited in the storer of point-to-point correction system.

Video data transmitting is delivered in the storer of point-to-point correction system, compared with photo after proofreading and correct, adopt sliding window recursive algorithm, level and smooth iteration recursive algorithm operational data obtains more excellent calibration result, forms the screen body and shows in real time data.

Screen body after proofreading and correct is shown that in real time data send to controller and send card, realize that finally the display screen point by point YC proofreaies and correct this function.

Each module concrete function principle of the utility model is as follows:

Main control module: manage other modules, various data sources are carried out dispatch deal.

The data operation module: the control information that the image information in the DVI reception buffer and host computer were processed compares computing, and YC is compensated, and obtains desirable data, then data is sent to DVI and sends buffer zone.

The DVI receiver module: the video data that sends according to the standard time sequence receiver, video decoding chip of digital video source, and data are put into the DVI reception buffer zone.

DVI sending module: the data of DVI buffer zone are sent to video coding chip according to the standard time sequence of digital video source.

Usb communication module: host computer order control data and correction data are received and dispatched and resolved.

SPI access module: SPI Fflash data are read and write control, deposit order data and correction data in flash and carry out power down protection.

SDRAM data access module: when system normally moves, be used for the access correction data, call at any time in order to the data operation module, accelerate data operation speed.

Alarm module: LED controller or LED display break down, and LED controller sends warning message, send sound and light alarm by alarm module.

Claims

1. a LED display YC corrective system, is characterized in that: comprise LED controller, LED display, data acquisition module, PC, data transmission module, pointwise correction module, alarm module; Wherein, data acquisition module comprises camera, the YC tester that is connected with PC respectively; The camera lens of described camera, the relative LED display setting respectively of YC tester; Described PC is connected with data transmission module, LED controller respectively; Described pointwise correction module is connected with data transmission module, LED controller respectively; Described LED controller is connected with LED display, alarm module respectively.

2. LED display YC corrective system according to claim 1, it is characterized in that: described pointwise correction module comprises FPGA, Video Decoder, video encoder, memory module; Wherein FPGA is connected with Video Decoder, video encoder, memory module respectively; Described Video Decoder, video encoder are connected with described data transmission module by DVI, HDMI data line; Described FPGA is connected with described data transmission module by the usb data line.

3. LED display YC corrective system according to claim 1, it is characterized in that: described YC tester comprises optical sensor, color temperature sensor.

4. LED display YC corrective system according to claim 1, it is characterized in that: described camera is the technical grade mm professional camera special.