CN210042020U

CN210042020U - Video signal conversion device and display apparatus

Info

Publication number: CN210042020U
Application number: CN201921007836.9U
Authority: CN
Inventors: 李斌
Original assignee: Jia Shenzhen City Li Dazhuanxian Science And Technology Ltd
Current assignee: Jia Shenzhen City Li Dazhuanxian Science And Technology Ltd
Priority date: 2019-07-01
Filing date: 2019-07-01
Publication date: 2020-02-07
Anticipated expiration: 2029-07-01

Abstract

The utility model discloses a video signal conversion device and a display device, wherein the video signal conversion device comprises a driving board card and a signal conversion module, and the driving board card is provided with a main chip for processing low-frequency video signals; the signal conversion module is electrically connected with the main chip, the driving board card receives an external input signal and outputs a first LVDS signal, and the signal conversion module comprises a first conversion unit and a second conversion unit. The utility model provides a video signal conversion equipment and display device, through first converting unit and second converting unit with the LVDS of the 75MHz of double-circuit that the drive integrated circuit board exported convert the LVDS of 150MHz of one way back, reconversion 150MHz into LVDS of one way, accomplish data bit number conversion and rate conversion, can be applicable to the display screen of 150 MHz's of one way LVDS data format then.

Description

Video signal conversion device and display apparatus

Technical Field

The utility model relates to a display technical field especially relates to video signal conversion equipment and display device.

Background

Low Voltage Differential Signaling (LVDS) (lowvoltagedientsignal) is an international standard for high-speed signal transmission, and is widely used in the field of liquid crystal display and data conversion, where a problem is encountered that there is a difference in data formats of input and output device ends, and a driving scheme supported by a device terminal (liquid crystal panel) needs to be selected in general according to the data format of the device terminal.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides video signal conversion equipment and display device, can realize from 75 MHz's LVDS signal of double-circuit to 150 MHz's of single-circuit TTL signal at the conversion to 150 MHz's of single-circuit LVDS signal of single-circuit through the cooperation of two chips, increased LCD screen drive signal's selection, also make the data format of sending terminal can suit with receiving terminal data format.

In order to achieve the above object, the utility model provides a video signal conversion device, which comprises a driving board card and a signal conversion module, wherein the driving board card is provided with a main chip for processing low-frequency video signals; the signal conversion module is electrically connected with the main chip, the main chip receives an external input signal and outputs a first LVDS signal, the signal conversion module comprises a first conversion unit and a second conversion unit, the first conversion unit converts the first LVDS signal into a first TTL signal, and the second conversion unit converts the first TTL signal into a second LVDS signal.

As an improvement, the first LVDS signal is a dual LVDS signal, the first TTL signal is a single TTL signal, and the second LVDS signal is a single LVDS signal.

As an improvement, the dual-channel LVDS signals are dual-channel 75MHz LVDS signals, the single-channel TTL signals are single-channel 150MHz TTL signals, and the single-channel LVDS signals are single-channel 150MHz LVDS signals.

As an improvement, the external input signal is one of VGA, RGB, EDP, MIPI, TTL, DP and HDMI.

A display device comprises a video signal conversion device and a liquid crystal display screen, wherein the video signal conversion device is electrically connected with the liquid crystal display screen, and the video signal conversion device is the video signal conversion device.

As an improvement, the driving board card comprises a control key and a constant current board driving circuit, the control key is electrically connected with the driving board card and used for adjusting the working mode of the driving board card, the driving board card is electrically connected with an external power supply and then provides electric energy for the constant current board driving circuit, and the constant current board driving circuit provides electric energy for the liquid crystal display screen.

The utility model provides a video signal conversion equipment and display device, through first converting unit and second converting unit with the LVDS of the 75MHz of double-circuit that the drive integrated circuit board exported convert the LVDS of 150MHz of one way back, reconversion 150MHz into LVDS of one way, accomplish data bit number conversion and rate conversion, can be applicable to the display screen of 150 MHz's of one way LVDS data format then.

Drawings

Fig. 1 is an overall system block diagram of a display device according to an embodiment of the present invention.

Fig. 2 is a block diagram of the system of fig. 1.

Fig. 3 is a detailed block diagram of the first conversion unit in fig. 2.

Fig. 4 is a detailed block diagram of the second conversion unit in fig. 2.

In the figure: 1. driving the board card; 11. a control key; 12. a constant current plate drive circuit; 2. a signal conversion module; 21. a first conversion unit; 22. a second conversion unit; 3. and a liquid crystal display screen.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, an embodiment of the present invention provides a video signal conversion apparatus, which includes a driving board 1 and a signal conversion module 2 electrically connected in sequence, wherein the driving board 1 is provided with a main chip for processing low-frequency video signals, and in this embodiment, the main chip is electrically connected to an external input device, receives an external input signal, and outputs a first LVDS signal; preferably, the first LVDS signal is a dual LVDS signal; further, the frequency of the dual LVDS signal is 75 MHz; it should be noted that the external input signal may be one of VGA, RGB, EDP, MIPI, TTL, DP, HDMI. In one embodiment, when the external input signal is a VGA signal, the main chip receives the VGA signal and outputs a first LVDS signal; the main chip sends the two paths of 75MHz LVDS signals to the signal conversion module 2, and the signal conversion module 2 converts the first LVDS signal into a single path of second LVDS signal through two steps, and then transmits the second LVDS signal to the liquid crystal display 3.

Referring to fig. 2, the driving board 1 is electrically connected to a control button 11 and a constant current board driving circuit 12, the driving board 1 is further connected to a power supply, the control button 11 is electrically connected to the driving board 1 and is used for adjusting the working mode of the driving board 1, and electric energy of the power supply supplies power to the liquid crystal display 3 after passing through the driving board 1 and the constant current board driving circuit 12; the following describes in detail a process of the signal conversion module 2 converting the first LVDS signal into the second LVDS signal in two steps: the signal conversion module 2 comprises a first conversion unit 21 electrically connected with a main chip and a second conversion unit 22 electrically connected with the first conversion unit 21, the second conversion unit 22 is electrically connected with the liquid crystal display 3, the first conversion unit 21 receives a first LVDS signal output by the driving board 1 and outputs a first TTL signal, and the second conversion unit 22 receives the first TTL signal and outputs a second LVDS signal chip; preferably, the first TTL signal is a one-way TTL signal; further, the frequency of the single TTL signal is 150 MHz; preferably, the second LVDS signal is a one-way LVDS signal; further, the frequency of the single LVDS signal is 150 MHz; it should be noted that, in the conventional signal conversion device, the driving board 1 is directly and electrically connected to the liquid crystal display 3, and the frequency of data is not changed, that is, the driving board is connected to the liquid crystal display 3 and is displayed through the liquid crystal display 3; according to the scheme, the first conversion unit 21 and the second conversion unit 22 are added between the driving board card 1 and the liquid crystal display 3, the data digit and the rate of the two-way 75MHz LVDS output by the driving board card 1 are converted into the one-way 150MHz TTL signal through the first conversion unit 21 and the second conversion unit 22, then the one-way 150MHz TTL signal is converted into the one-way 150MHz LVDS signal, under the condition that the existing driving scheme is not changed, the data formats of input and output equipment ends are kept consistent, data transmission and display are achieved, the cost of the one-way 150MHz LVDS signal driving scheme is higher, and the cost can be saved by using the signal conversion device.

Referring to fig. 3, in this embodiment, the first conversion unit 21 converts the dual-channel 75MHz LVDS signal into the single-channel 150MHz TTL signal and then sends the converted signal to the second conversion unit 22; the first conversion unit 21 is a chip of, but not limited to, the THC63LVD1022 type, and other chips having this function can also be applied to the present embodiment; it should be noted that the LVDs-INPUT terminal of the THC63LVD1022 chip is electrically connected to the corresponding interface of the main chip, the LVDs-INPUT terminal of the chip receives the dual-channel 75MHz LVDs signal OUTPUT by the driving chip 1, and the LVCMOS-OUTPUT terminal of the chip OUTPUTs the single-channel 150MHz TTL signal and then sends the single TTL signal to the second conversion unit 22.

Referring to fig. 4, in this embodiment, the second converting unit 22 receives a single 150MHz TTL signal and then converts the single 150MHz TTL signal into a single 150MHz LVDS signal, it should be noted that, in this embodiment, the second converting unit 22 is, but not limited to, a chip with a model number of THC63LVDM87, and other chips with this function can also be applied to this embodiment; it should be noted that, the TTL-INPUTS end of the THC63LVDM87 chip is electrically connected to the corresponding interface of the first conversion unit 21, the TTL-INPUTS end of the chip receives the single 150MHz TTL signal output by the first conversion unit 21, and the LVDS-OUTPUTS end of the chip OUTPUTS the single 150MHz LVDS signal and then sends the single 150MHz LVDS signal to the liquid crystal display 3; the LVDS-OUTPUTS end of the chip is connected with the liquid crystal display 3 through a flat cable to display video signals.

The above are only embodiments of the present invention, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims

1. A video signal conversion device comprises a driving board card and a signal conversion module, wherein a main chip for processing a low-frequency video signal is arranged on the driving board card; the method is characterized in that: the signal conversion module is electrically connected with the main chip, the main chip receives an external input signal and outputs a first LVDS signal, the signal conversion module comprises a first conversion unit and a second conversion unit, the first conversion unit converts the first LVDS signal into a first TTL signal, and the second conversion unit converts the first TTL signal into a second LVDS signal.

2. The video signal conversion device according to claim 1, wherein the first LVDS signal is a dual LVDS signal, the first TTL signal is a single TTL signal, and the second LVDS signal is a single LVDS signal.

3. The video signal conversion device according to claim 2, wherein the dual LVDS signals are dual 75MHz LVDS signals, the single TTL signal is a single 150MHz TTL signal, and the single LVDS signal is a single 150MHz LVDS signal.

4. The video signal conversion device of claim 1, wherein the external input signal is one of VGA, RGB, EDP, MIPI, TTL, DP, HDMI.

5. A display apparatus comprising a video signal conversion device and a liquid crystal display, said video signal conversion device being electrically connected to said liquid crystal display, said video signal conversion device being the video signal conversion device according to any one of claims 1 to 4.

6. The display device as claimed in claim 5, wherein the driving board card comprises a control button and a constant current board driving circuit, the control button is electrically connected with the driving board card for adjusting the operating mode of the driving board card, the driving board card is electrically connected with an external power supply for supplying power to the constant current board driving circuit, and the constant current board driving circuit supplies power to the liquid crystal display screen.