WO2008154790A1

WO2008154790A1 - Assembled circuit module of a lcd large- screen and control method thereof

Info

Publication number: WO2008154790A1
Application number: PCT/CN2008/000556
Authority: WO
Inventors: Peng Wang; Guoquan Zhang
Original assignee: Shanghai Goodview Electronic Co., Ltd.
Priority date: 2007-06-20
Filing date: 2008-03-20
Publication date: 2008-12-24
Also published as: CN101329841A

Abstract

An assembled circuit module of a LCD large- screen is provided. The circuit module comprises at least one signal input terminal and S blocks. The S blocks are divided into N transverse blocks and M longitudinal blocks. Each of the blocks comprises a main control SCALER module with scaling function. The signal is input to the main control SCALER of a first block. Then, the signal is transferred to a second block in transverse direction, the last block in transverse direction, a second block in longitudinal direction and the last block in order from the main control SCALER of the first block.

Description

Splicing circuit module in LCD large screen and control method thereof

The invention relates to an LCD large screen, in particular to the LCD large screen splicing circuit module and a control method thereof. Background technique

In the LCD large screen splicing, the splicing system is mainly composed of three parts, a large screen projection wall, a projector array, and a control system. The control system is the core.

At present, there are three types of splicing control systems popular in the world, such as hardware splicing system, software splicing system, and splicing system combining software and hardware.

The hardware splicing system is: Displaying an independent picture with any screen. Because the hardware splicing image processing is completely real-time dynamic display installation, the operation is simple; but the disadvantage is that the splicing scale is small, and it is not suitable for multi-screen splicing, and the opened window is fixed. For a screen size.

The software splicing system is: The multi-screen display card is a special display card, also known as a large-screen splicing card; it can realize multiple screens to display one large-screen multi-screen display card, which can enable one PC to support multiple displays/ TV; display different screens on different screens, several monitors/TVs can be combined to form one large screen; in addition, multiple cards can be installed simultaneously on one computer, the number of screens can be arbitrarily selected, and the screen mode can be arranged arbitrarily However, this method must be supported by a PC; and there are restrictions on the source of the program; to achieve image segmentation is expensive, complicated, and has a lot of wiring. Each display and PC is directly connected to the display wall controller in addition to the standard graphics workstation CPU, memory, input and output interface and operating system, but also has multiple video, RGB input and output interface, can be a variety of external video After the RGB analog signal is digitized, it is imaged in the imaging device, and then converted into a single analog signal output to the large screen, and can be freely moved, enlarged and reduced on the large screen to realize seamless stitching of any size across the screen and multiple windows, like It is as flexible and convenient to operate in a large window. This process is also called soft stitching. The display wall controller is also called a soft stitch controller. This kind of special equipment is expensive.

The splicing system combining software and hardware can combine the above two methods to overcome its shortcomings.

It can be seen from Fig. 1: The circuit module of each block is composed of a dedicated map processor; the external video signal is first input to the image control system, and the matrix of the image control system is switched, and the required video signal is output, and then enters each The dedicated image processor of the display cuts the image (the software is written in advance and the display is placed in position).

The dedicated graphics processor has two problems: The first is dedicated equipment, which is more expensive to repair and cost. The second is that if the small window is opened in the middle of the big screen, it must be realized by the image control system, which leads to high price, which is not conducive to large The promotion of the screen. Summary of the invention

The technical problem to be solved by the present invention is to provide a splicing circuit module in an LCD large screen, which aims to solve the above problems;

The invention also provides a splicing method of the above circuit module;

In order to solve the above technical problem, the present invention is achieved by the following technical solutions:

The splicing circuit module of the present invention comprises: at least one signal input, S blocks; the S blocks can be divided into N horizontal direction blocks and M vertical direction blocks; each of the blocks includes a zoom The function of the master SCALER module (LCD driver board); the signal is input to the master SCALER module in the first block; the master SCALER module in the first block is passed to the second block in the horizontal direction, the horizontal end One block is then input to the second block in the vertical direction; it is connected to the last block in turn.

The method of the present invention is achieved by the following steps:

The input signal enters the SCALER of the main control board, and the input signal is selected by the remote controller;

The input image is extracted by sampling according to the set requirements and placed in the image buffer;

The driving screen is driven by the image processing including the image quality processing, the format conversion, the size scaling, and the timing conversion. Compared with the prior art, the beneficial effects of the present invention are: Fully utilizing the timing separation technology of the LCD main control board SCALER to implement the image The segmentation, and into a large screen, has the advantage of not increasing the cost on the basis of the display, is the lowest cost in the wall, and flexible operation, can be installed first, then combined.

DRAWINGS

1 is a circuit block diagram of each block in a large LCD screen in the prior art:

Figure 2 is a circuit block diagram of each block in the present invention;

Figure 3 is a diagram of the main control SCALER module in Figure 2;

Figure 4 is a schematic view of the processing method of the present invention;

detailed description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

2, the splicing circuit module of the present invention includes: at least one signal input, S blocks; the S blocks can be divided into N horizontal direction blocks and M vertical direction blocks; The block includes a master SCALER module with a zoom function (LCD driver board); the signal is input to the master SCALER module in the first block; the master SCALER module in the first block is passed to the second horizontal field The last block of the block and the horizontal direction is input to the second block in the vertical direction; the last block is connected in turn;

It can be seen from Figure 3: The signal input in the master SCALER module is first sampled by the LCD driver board. The image 1/MXN to be displayed is extracted and put into the SDRAM, and processed by SCALER; the at least one signal input may be one or more of VGA, HDMI, and YpbPr.

It can be seen from FIG. 4 that the method of the present invention is implemented by the following steps: the input signal enters the SCALER of the main control board, and the input signal is selected by the remote controller;

The driving screen is driven by a sequence processing including image quality processing, format conversion, size scaling, timing conversion, etc.; the signal selected by the remote controller is: VGA YPbPr HDMI;

Set the number of screens in the menu;

X/Y sets the number of screens to be multiplied, up to 10 X 10;

Enter the location of the current screen to display in the entire image.

The input image is sampled and processed in the image processor (mainly including image quality processing, format conversion, size scaling, timing transformation, etc.). After a series of internal processing, the digital video signal is converted to match the data format and timing of the LCD panel display, driving the LCD display.

Claims

Rights request

1 . A splicing circuit module in an LCD large screen, comprising: at least one signal input, S blocks; the S blocks can be divided into N horizontal direction blocks and M vertical direction blocks; and the feature is: Each block includes a master SCALER module with a zoom function; a signal is input to the master SCALER module in the first block; the master SCALER module in the first block is passed to the second block in the horizontal direction The last block in the horizontal direction is input to the second block in the vertical direction; it is connected to the last block in turn.

2 . The splicing circuit module of the LCD large screen according to claim 1 , wherein the signal input in the main control SCALER module is first sampled by the liquid crystal panel driving board, and the image to be displayed is extracted by 1/MXN as required. Come out, put it in SDRAM, and process it through SCALER.

The splicing circuit module for an LCD large screen according to claim 1 or 2, wherein: the at least one signal input may be one or more of VGA, HDMI, and YpbPr.

4. A control method for the splicing circuit in the LCD large screen is realized by the following steps:

The driving screen is driven by sequential processing including image quality processing, format conversion, size scaling, and timing conversion.

5. The control method of the splicing circuit in the large screen of the LCD according to claim 4, wherein in the step of "selecting the input signal by the remote controller": the signal selected by the remote controller can be: VGA YPbPr HDMI; in the menu Set the number of screens;

X/Y sets the number of screens to be multiplied, up to 10 X 10;

Enter the location of the current screen to display in the entire image.