CN2590112Y

CN2590112Y - Multifunctional LVDS interface module of digital display equipment

Info

Publication number: CN2590112Y
Application number: CN 02255362
Authority: CN
Inventors: 高兆峰; 王继东; 阎荣
Original assignee: Qingdao Hisense Electronics Co Ltd
Current assignee: Qingdao Hisense Electronics Co Ltd
Priority date: 2002-11-19
Filing date: 2002-11-19
Publication date: 2003-12-03
Anticipated expiration: 2012-11-19

Abstract

The utility model relates to a multifunctional LVDS interface module of digital display equipment, which belongs to the technical field of digital display. The utility model is composed of a printed circuit board and an electronic circuit. The electronic circuit is composed of two TTL/LVDS conversion integrated circuits N001 and N002, a pin socket XP002 connected with the N001, a pin socket XP003 connected with the N002, a pin socket XP004 connected with the N001 and the N002, and a DC-DC conversion integrated circuit connected with the devices above. The DC-DC conversion integrated circuit is also connected with the pin socket XP001. The integrated circuits N001 and N002 are both DS90C383A shape. The utility model can convert TTL level format into LVDS signals so as to cause the display device to display pictures with high definition completely and veritably. The utility model can realize serial data transmission as high as billions. The utility model has the advantages of high transmission rate, large transmission range and high anti-interference capability. The utility model can be used for various LCD and PDP numerical display devices.

Description

The multi-functional LVDS interface module of digital distance scope

Technical field

The utility model belongs to the digital distance scope technical field, more particularly relates to the improvement of the data transmission circuit of digital distance scope.

Background technology

Raising along with the resolution of LCD (LCD), PDP advanced digital distance scopes such as (plasma displays), between display screen and wiring board, adopt traditional TTL display interface to transmit high speed image data stream, to inevitably produce the decay and the interference of signal, be difficult to complete, true reappearance high-definition screen.LVDS (Low Voltage Differential Signaling) is a kind of low voltage differential high-speed transfer standard, can realize the serial data transmission up to gigabit, and it has the transfer rate height, long transmission distance, characteristics such as antijamming capability is strong.Present many LCD, PDP display screen have all adopted the interface of LVDS as video data.Yet, the output of all at present image processing ics all be the digital rgb signal of Transistor-Transistor Logic level form, this just needs a LVDS interface module is the LVDS signal with the digital rgb conversion of signals of Transistor-Transistor Logic level form.

The purpose of this utility model is, for addressing the above problem, provides a kind of multi-functional LVDS interface module, and its circuit part has adopted two LVDS coding integrated circuit DS90C383A, the power supply integrated regulator CM1117 of a slice 3.3V.

Summary of the invention

In order to achieve the above object, the utility model is made up of printed circuit board (PCB) and the electronic circuit that is installed on the printed circuit board (PCB).The pin type socket XP004 that electronic circuit is connected with N002 by two TTL/LVDS converter ic N001 and N002, the pin type socket XP002 that is connected with integrated circuit N001, the pin type socket XP003 that is connected with integrated circuit N002, with integrated circuit N001 and be connected to the DC-DC of its power supply conversion integrated circuit N003 with above-mentioned device is formed.DC-DC conversion integrated circuit N003 also is connected with pin type socket XP001.TTL/LVDS converter ic N001 and N002 are the DS90C383A type.

For achieving the above object, the utility model is work like this: from digital rgb signal, row field signal, clock signal, enable signal to two DS90C383A of picture processing chip output Transistor-Transistor Logic level form, portion is to deliver to display panel behind the LVDS signal with the TTL conversion of signals within it, is converted into the digital signal rear drive panel display image of Transistor-Transistor Logic level form again by the LVDS decoding integrated circuit of display panel inside.It is the 3.3V DC voltage that CM1117 is used for the 5V dc voltage conversion, is used for being the DS90C383A power supply.

Advantage of the present utility model and good effect are: circuit is simple and reliable, interference and attenuation problem in the high-definition picture signals transmission have been solved with low-down cost, improved image display effect, had bigger Practical significance in digital flat panel demonstration field.

Description of drawings

Fig. 1 is an electronic circuit schematic diagram of the present utility model.

Shown in Figure 1, the pin type socket XP004 that electronic circuit of the present utility model is connected with N002 by two TTL/LVDS converter ic N001 and N002, the pin type socket XP002 that is connected with integrated circuit N001, the pin type socket XP003 that is connected with integrated circuit N002, with integrated circuit N001 and be connected to the DC-DC of its power supply conversion integrated circuit N003 with above-mentioned device is formed.DC-DC conversion integrated circuit N003 also is connected with pin type socket XP001.TTL/LVDS converter ic N001 and N002 are the DS90C383A type.

Embodiment

Embodiment 1.A kind of multi-functional LVDS interface module of digital distance scope.Shown in pattern.Pin type socket XP004 that its electronic circuit is connected with N002 by two TTL/LVDS converter ic N001 and N002, the pin type socket XP002 that is connected with N001, the pin type socket XP003 that is connected with N002, with N001 and the DC-DC conversion integrated circuit N003 that is connected power supply with above-mentioned device form.DC-DC conversion integrated circuit N003 also is connected with pin type socket XP001.Integrated circuit N001 and N002 are the DS90C383A type.

Two integrated circuit of N001, N002 (DS90C383A) are used for RGB digital signal, row, field sync signal, enable signal, the clock signal with the Transistor-Transistor Logic level form of picture processing chip output, and wherein each chip can be handled the rgb signal of 24bit and the clock control signal of 4bit (row, field sync signal, enable signal, clock signal).When the image output format is single pixel format (24bit RGB), use any a slice wherein can finish the conversion process of TTL to LVDS.When the image output format is the plain form of double image (48bit RGB), then need to use two DS90C383A to carry out the conversion process of TTL to LVDS, at this moment N001 is used for handling the picture signal of even field, and N002 is used for handling the picture signal of odd field.Its #51, #52, #54, #55, #56, #3, #50, #2, #4, #6, #7, #11, #12, #14, #8, #10, #15, #19, #20, #22, #23, #24, #16, #18 connect 24bit digital rgb signal (TTL).#27, #28, #30, #31 connect row, field sync signal, enable signal, clock signal respectively.#1, #9, #26 are power pin, connect the 3.3V DC voltage.#32 is the Energy Saving Control pin, is high level during operate as normal, and when it becomes low level, chip will enter holding state to reduce power consumption, and this pin connects the 3.3V DC voltage in the present embodiment.#44, #34 are respectively the power supply power pin of the output of LVDS signal, phaselocked loop part, all connect the 3.3V DC voltage.#17 is used for being provided with trigger mode, is that rising edge clock triggers during high level, and for the clock negative edge triggers, the switching of high-low level can be made up by open circuit, the short circuit of resistance R 1, R2, R3, R4 and be realized during low level.When R1, R3 short circuit, the #17 of N001, N002 all connects the 3.3V DC voltage during R2, R4 open circuit, and be the rising edge trigger mode this moment.When R2, R4 short circuit, during R1, R3 open circuit, the equal ground connection of the #17 of N001, N002, be the negative edge trigger mode this moment.N003 (CM1117) is the conversion integrated circuit of DC-DC, its effect be with the 5V dc voltage conversion for the 3.3V DC voltage be N001, N002 the power supply.The #1 of XP001 directly links to each other with #27, the #28 of XP004, and working is to be the liquid crystal display power supply, and its voltage is determined according to the parameter of liquid crystal display.Capacitor C 1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13 are power filtering capacitor, play the effect of disturbing of eliminating.

Embodiment 1 can be the LVDS signal with the Transistor-Transistor Logic level format conversion, makes that display device is complete, the true reappearance high-definition screen.Can realize serial data transmission up to gigabit, the transfer rate height, transmission range is big, and antijamming capability is strong.Can be widely used in various LCD, the PDP digital distance scope.

Claims

1. the multi-functional LVDS interface module of a digital distance scope, it is made up of printed circuit board (PCB) and the electronic circuit that is installed on the printed circuit board (PCB), it is characterized in that said electronic circuit is by two TTL/LVDS converter ic N001 and N002, the pin type socket XP002 that is connected with integrated circuit N001, the pin type socket XP003 that is connected with integrated circuit N002, the pin type socket XP004 that is connected with N002 with integrated circuit N001 and be connected to the DC-DC of its power supply conversion integrated circuit N003 with above-mentioned device forms, and the DC-DC conversion integrated circuit also is connected with pin type socket XP001.

2. according to the multi-functional LVDS interface module of the described digital distance scope of claim 1, it is characterized in that said TTL/LVDS converter ic N001 and N002 are the DS90C383A type.