CN216700192U

CN216700192U - HDMI signal conversion circuit applied to LED display screen

Info

Publication number: CN216700192U
Application number: CN202220118497.7U
Authority: CN
Inventors: 林小峰; 杨剑君; 李伍
Original assignee: Shenzhen Wharton Technology Co ltd
Current assignee: Shenzhen Wharton Technology Co ltd
Priority date: 2022-01-15
Filing date: 2022-01-15
Publication date: 2022-06-07
Anticipated expiration: 2032-01-15

Abstract

The application relates to a be applied to HDMI signal conversion circuit of LED display screen relates to the LED display screen field, includes at least: the signal input end of the signal conversion module is connected with the HDMI line and used for receiving the HDMI signal, and the output end of the signal conversion module is connected with the driving chip of the lamp panel; and the power supply module is connected with the power supply end of the signal conversion module. Converting the common HDMI signals into RGB data group signals which can be received and used by an LED display screen driving chip through a signal conversion module; and the signal conversion module can be built in the LED display screen, so that the LED display screen can be directly connected with the HDMI signal to receive the image signal and display the image signal, and the overall universality is improved.

Description

HDMI signal conversion circuit applied to LED display screen

Technical Field

The application relates to the field of LED display screens, in particular to an HDMI signal conversion circuit applied to an LED display screen.

Background

The existing LED display screen generally adopts a network cable as a channel for transmitting image data. If the screen body adopts an RJ45 interface, one network cable can realize image data transmission of 65 ten thousand points at most. Referring to fig. 1, the image data is encoded and outputted by the LED transmitting card 600, and is connected to the adapter board 510 in the panel body 500 through the network cable, and the adapter board 510 is installed with the LED receiving card 520, the LED receiving card 520 is responsible for receiving the image data transmitted from the network cable, and is decoded by the FPGA chip on the LED receiving card 520 and converted into RGB packet data (including row and column addresses, RGB data, clock signals, etc.), and these data are transmitted to the driving chip 410 of the lamp panel 400 through the adapter board 510, so as to drive the lamp panel 400 to light up and display the image.

The prior art adopts the image data coding, transmission, receiving and decoding which are carried out by adopting the respective private coding protocol and data transmission protocol of a control system manufacturer, adopts a non-standardized data protocol and adopts a physical interface of an Ethernet cable, and has poor universality.

Disclosure of Invention

The purpose of this application is to provide the HDMI signal conversion circuit who is applied to the LED display screen, can receive general HDMI signal and convert the required RGB grouping data of LED display screen display into, the commonality is stronger.

The application provides a be applied to HDMI signal conversion circuit of LED display screen adopts following technical scheme:

an HDMI signal conversion circuit applied to an LED display screen at least comprises:

the signal input end of the signal conversion module is connected with the HDMI line and used for receiving the HDMI signal, and the output end of the signal conversion module is connected with the driving chip of the lamp panel;

and the power supply module is connected with the power supply end of the signal conversion module.

By adopting the technical scheme, the universal HDMI line is utilized for signal transmission, and then the HDMI signal is converted into RGB grouped data required by the display of the LED display screen through the signal conversion module, so that the universality is strong.

Furthermore, the signal conversion module includes at least one signal conversion chip, and one of them signal conversion chip is connected with the HDMI line, and all the other signal conversion chips are connected with the signal sending terminal of preceding signal conversion chip in proper order, the signal conversion chip all is connected with the driver chip of lamp plate.

Through adopting above-mentioned technical scheme, the setting of a plurality of signal conversion chips for the HDMI signal can carry out the secondary and forwardedly, transmits between different LED box, with the concatenation combination display function that realizes the LED display screen.

Furthermore, the conversion circuit further comprises a signal indicator light module, and the signal conversion module and/or the power supply module are connected with the signal indicator light module.

Through adopting above-mentioned technical scheme, utilize the setting of signal indication lamp module, can remind operator power module or signal conversion module whether normal operating, do benefit to the troubleshooting.

Further, the signal indicator light module comprises a power indicator light sub-circuit and a signal light sub-circuit; the number of the signal lamp sub-circuits is consistent with that of the signal conversion chips, and the signal lamp sub-circuits are connected in a one-to-one correspondence mode.

By adopting the technical scheme, each signal conversion chip is provided with the signal lamp sub-circuit for matching and reminding, so that troubleshooting and maintenance are facilitated.

Furthermore, the power indicator sub-circuit and the signal lamp sub-circuit both comprise light emitting diodes, the anodes of the light emitting diodes are connected to the signal output end, and the cathodes of the light emitting diodes are grounded.

Further, the signal conversion chip adopts ICND 6602.

In summary, the present application includes at least one of the following beneficial technical effects:

1. converting the common HDMI signals into RGB data group signals which can be received and used by an LED display screen driving chip through a signal conversion module; and the signal conversion module can be built in the LED display screen, so that the LED display screen can be directly connected with the HDMI signal to receive the image signal and display the image signal.

2. The HDMI signal can carry out the secondary and forwardedly, transmits between different LED box to realize the concatenation combination display function of LED display screen.

Drawings

FIG. 1 is a schematic diagram of the principle in the background of the present application;

FIG. 2 is a schematic block diagram of an embodiment of the present application;

FIG. 3 is a first functional block diagram of an embodiment of the present application;

FIG. 4 is a functional block diagram II of an embodiment of the present application;

fig. 5 is a schematic diagram of a signal conversion chip and a signal lamp sub-circuit according to an embodiment of the present application.

In the figure, 100, a signal conversion module; 110. a signal conversion chip; 200. a power supply module; 300. a signal indicator light module; 310. a power indicator sub-circuit; 320. a signal lamp sub-circuit; 400. a lamp panel; 410. a driving chip; 500. a screen body; 510. an adapter plate; 520. an LED receiving card; 600. the LED sends the card.

Detailed Description

The present application is described in further detail below with reference to fig. 1-5.

Based on the problem that the physical interface of the Ethernet cable is adopted in the prior art, and a non-standardized data protocol is adopted, and the universality is poor, the HDMI signal conversion circuit applied to the LED display screen is provided, referring to FIG. 2, the universal HDMI signal is converted into RGB grouped data required by the LED display screen through the signal conversion circuit, and the universality is improved.

Referring to fig. 3, the signal conversion circuit includes a signal conversion module 100, a power module 200, and a signal indicator light module 300, wherein a signal input terminal of the signal conversion module 100 is connected to an HDMI line for receiving an HDMI signal, and a signal output terminal of the signal conversion module 100 is connected to a driver chip 410 of the lamp panel 400. The signal conversion module 100 and/or the power supply module 200 are connected to a signal indicator light module 300, and the signal indicator light module 300 is used for troubleshooting the signal conversion module 100 and/or the power supply module 200. The power module 200 is connected to the power terminals of the signal conversion module 100 and the signal indicating lamp module 300, and is used for supplying power to the signal conversion module 100 and the signal indicating lamp module 300.

Referring to fig. 4, the signal conversion module 100 includes at least one signal conversion chip 110, for example, N signal conversion chips 110, which are sequentially a first signal conversion chip 110, a second signal conversion chip 110, and an nth signal conversion chip 110, where N is an integer greater than or equal to 1. The first signal conversion chip 110 is connected to the HDMI cable, the second signal conversion chip 110 to the nth signal conversion chip 110 are sequentially connected to the signal transmitting terminal of the previous signal conversion chip 110, and the signal conversion chips 110 are all connected to the driving chip 410 of the lamp panel 400. The HDMI signal can carry out the secondary and forwardedly, transmits between different LED box to realize the concatenation combination display function of LED display screen. Preferably, the signal conversion chip 110 in the present application employs the ICND 6602.

In conjunction with fig. 4 and 5, the signal indicator light module 300 includes a power indicator light sub-circuit 310 and a signal light sub-circuit 320. The number of the signal lamp sub-circuits 320 is the same as the number of the signal conversion chips 110, and the signal lamp sub-circuits are connected in a one-to-one correspondence manner; the power indicator sub-circuit 310 is coupled to the power module 200. And the power indicator sub-circuit 310 and the signal lamp sub-circuit 320 both include light emitting diodes, the anodes of the light emitting diodes are connected to the signal output end of the power module 200 or the signal output end of the signal conversion chip 110, and the cathodes of the light emitting diodes are grounded. Taking one of the signaling light sub-circuits 320 as an example, referring to fig. 5, the anode of the led D2 is connected to the port 78 of the icld 6602 signal conversion chip 110, and the cathode of the led D2 is grounded through the series resistor R7.

The implementation principle of the embodiment of the application is as follows:

through the signal conversion module 100, converting the common HDMI signal into an RGB data set signal that can be received and used by the LED display screen driving chip 410; and the signal conversion module 100 may be built in the LED display screen, so that the LED display screen may be directly connected to the HDMI signal to receive the image signal and perform displaying. Moreover, the HDMI signals can be transmitted for the second time among different LED boxes, so that the splicing combination display function of the LED display screen is realized.

The embodiments of the present invention are preferred embodiments of the present application, and the protection scope of the present application is not limited thereby, wherein like parts are denoted by like reference numerals. Therefore, the method comprises the following steps: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a be applied to HDMI signal conversion circuit of LED display screen which characterized in that includes at least:

the signal conversion module (100) is connected with the HDMI line at a signal input end and used for receiving HDMI signals, and the signal output end is connected with a driving chip (410) of the lamp panel (400);

and the power supply module (200) is connected with the power supply end of the signal conversion module (100).

2. The HDMI signal conversion circuit applied to the LED display screen according to claim 1, wherein the signal conversion module (100) comprises at least one signal conversion chip (110), one signal conversion chip (110) is connected with the HDMI line, the other signal conversion chips (110) are sequentially connected with a signal transmitting end of the previous signal conversion chip (110), and the signal conversion chips (110) are connected with a driving chip (410) of the lamp panel (400).

3. The HDMI signal conversion circuit applied to the LED display screen according to claim 2, wherein the conversion circuit further comprises a signal indicator light module (300), and the signal conversion module (100) and/or the power supply module (200) is connected with the signal indicator light module (300).

4. The HDMI signal conversion circuit applied to the LED display screen according to claim 3, wherein the signal indicator light module (300) comprises a power indicator light sub-circuit (310) and a signal light sub-circuit (320); the number of the signal lamp sub-circuits (320) is consistent with that of the signal conversion chips (110), and the signal lamp sub-circuits are connected in a one-to-one correspondence manner.

5. The HDMI signal conversion circuit applied to the LED display screen according to claim 4, wherein the power indicator sub-circuit (310) and the signal sub-circuit (320) each comprise a light emitting diode, an anode of the light emitting diode is connected to the signal output end, and a cathode of the light emitting diode is grounded.

6. The HDMI signal conversion circuit applied to the LED display screen according to claim 4, wherein the signal conversion chip (110) adopts ICND 6602.