CN208707782U - A kind of conversion circuit that HDMI signal is converted to rgb signal - Google Patents
A kind of conversion circuit that HDMI signal is converted to rgb signal Download PDFInfo
- Publication number
- CN208707782U CN208707782U CN201821560460.XU CN201821560460U CN208707782U CN 208707782 U CN208707782 U CN 208707782U CN 201821560460 U CN201821560460 U CN 201821560460U CN 208707782 U CN208707782 U CN 208707782U
- Authority
- CN
- China
- Prior art keywords
- capacitor
- signal
- unit
- hdmi
- supply voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
The utility model provides a kind of conversion circuit that HDMI signal is converted to rgb signal, including signal conversion unit, crystal oscillator unit, several filter units, reset unit, HDMI analog module supply voltage VCC1V8, terminals POWER voltage VCC3V3, number I/O supply voltage VDD3V3, digital core supply voltage VDD1V8, HDMI signal input unit, rgb video output unit, audio output unit and control module unit；The HDMI signal input unit include RXA_0- /+(TMDS Data 0- /+), RXA_1- /+(TMDS Data 1- /+), RXA_2- /+(TMDS Data 2- /+), RXA_C- /+(TMDS Clock- /+) signal end and HDCP slave serial clock terminal DDCA_SCL, HDCP slave serial clock terminal DDCA_SDA and HDMI Port detecting end RXA_5V, the conversion communication from HDMI signal to rgb signal can be achieved, and then replacement liquid crystal display die set or system board are not had to, simple and convenient and integrated level is high, and there is broad applicability (driving rgb interface display module, and system PC output end is HD MI or DVI signal).
Description
[technical field]
The utility model relates to signal conversion circuit technical field, more particularly to a kind of simple and convenient and integrated level is high, has
The conversion circuit that HDMI signal is converted to rgb signal of broad applicability.
[background technique]
The general outputting data signals of mainstream PC Peripheral Interface are HDMI or DVI signal at present, such as host PC passes through
TMDSData0- /+, TMDSData1- /+, TMDSData2- /+, TMDSClock- /+interface export HDMI or DVI signal, and show
Show that mould group is rgb interface (R0-R7, G0-G7, B0-B7 and DEN, HSYNC, VSYNC, PCLK), i.e. display module needs to input
Data-signal is rgb signal.The input signal required due to host PC output signal (HDMI or DVI signal) and display module
(rgb signal) is inconsistent, causes not can be carried out efficient communication between host PC and advanced liquid crystal display module, can not put up
Imitate reliable and secure system.
In addition HDMI signal or DVI signal strong antijamming capability, and be standard interface, it is suitble to long distance transmission；And number
It is few (8 signal wires, and rgb signal at least needs 28 signal wires) according to line.
For the above status, most manufacturers can select to update mainboard CPU or replace liquid crystal display die set, still, if more
New mainboard CPU will will increase the debugging verifying cost and bigger time cost that new CPU is imported；If replacing liquid crystal display mode
Group will to reduce product competitiveness, be unfavorable for manufacturer's development.
[utility model content]
To overcome the problems of prior art, it is high that the utility model provides a kind of simple and convenient and integrated level, has wide
The conversion circuit that HDMI signal is converted to rgb signal of general applicability.
The scheme that the utility model solves technical problem is to provide a kind of conversion electricity that HDMI signal is converted to rgb signal
Road, including signal conversion unit, crystal oscillator unit, several filter units, reset unit, HDMI analog module supply voltage
VCC1V8, terminals POWER voltage VCC3V3, number I/O supply voltage VDD3V3, digital core supply voltage VDD1V8, HDMI letter
Number input unit, rgb video output unit, audio output unit and control module unit；The HDMI signal input unit
Including RXA_0- /+(TMDSData0- /+), RXA_1- /+(TMDSData1- /+), RXA_2- /+(TMDSData2- /+), RXA_
C- /+(TMDSClock- /+) signal end and HDCP slave serial clock terminal DDCA_SCL, HDCP slave serial clock terminal
DDCA_SDA and HDMI Port detecting end RXA_5V；The crystal oscillator unit includes first capacitor C1, the second capacitor C2 and crystal oscillator
Y1, and the both ends of crystal oscillator Y1 are separately connected the input terminal of first capacitor C1, the second capacitor C2, the electricity of the first capacitor C1 and second
Hold C2 relative to crystal oscillator Y1 another termination publicly；The signal conversion unit includes signal processing module U1, HDMI signal
Receiving end, rgb video signal output end, audio signal output end and control signal receiving end；The filter unit include by
The end HDMI analog module supply voltage VCC1V8, third capacitor C3, the 4th capacitor C4, the 5th capacitor C5, the 6th capacitor C6 composition
The first filter unit and by the end terminals POWER voltage VCC3V3, the 8th capacitor C8, the 9th capacitor C9, the tenth capacitor C10,
Second filter unit of 11 capacitor C11 composition and by the end digital core supply voltage VDD1V8, the 12nd capacitor C12, the
13 capacitor C13, the 14th capacitor C14, the third filter unit of the 15th capacitor C15 composition and by digital I/O power supply electricity
Press the 4th that the end VDD3V3, the 16th capacitor C16, the 17th capacitor C17, the 18th capacitor C18, the 19th capacitor C19 are formed
Filter unit；The reset unit includes first resistor R1, the 7th capacitor C7, the digital core end supply voltage VDD1V8 and answers
Position signal end RSTN；The rgb video output unit include rgb signal line R0-R7, G0-G7, B0-B7, DEN, HSYNC,
VSYNC, PCLK and signal conversion unit video signal output；The audio output unit includes audio signal audio_S/
PDIF, audio_SCLK, audio_LRCLK, audio_MCLK and signal conversion unit Digital audio output port S/PDIF, audio
Serial clock output end SCLK, audio left/right output terminal of clock LRCLK and audio host clock output end MCLK；The control
Molding module unit includes serial clock control terminal SCL, serial data control terminal SDA, interrupts control terminal INT, digital control channel
CEC and hot plug signal detection end HPA_A.
Preferably, each third capacitor C3 in first filter unit, the 4th capacitor C4, the 5th capacitor C5, the 6th electricity
Hold C6 to be connected in parallel, and each third capacitor C3, the 4th capacitor C4, the 5th capacitor C5, the 6th one end capacitor C6 and HDMI simulate mould
The block end supply voltage VCC1V8 is connected, and another termination is publicly.
Preferably, each 8th capacitor C8 in second filter unit, the 9th capacitor C9, the tenth capacitor C10, the 11st
Capacitor C11 is connected in parallel, and each 8th capacitor C8, the 9th capacitor C9, the tenth capacitor C10, the 11st one end capacitor C11 and terminal
The end supply voltage VCC3V3 is connected, and another termination is publicly.
Preferably, each 12nd capacitor C12 in the third filter unit, the 13rd capacitor C13, the 14th capacitor
C14, the 15th capacitor C15 are connected in parallel, and each 12nd capacitor C12, the 13rd capacitor C13, the 14th capacitor C14, the tenth
Five one end capacitor C15 are connected with the end digital core supply voltage VDD1V8, and another termination is publicly.
Preferably, each 16th capacitor C16 in the 4th filter unit, the 17th capacitor C17, the 18th capacitor
C18, the 19th capacitor C19 are connected in parallel, and each 16th capacitor C16, the 17th capacitor C17, the 18th capacitor C18, the tenth
Nine one end capacitor C19 are connected with the end number I/O supply voltage VDD3V3, and another termination is publicly.
Compared with prior art, a kind of conversion circuit that HDMI signal is converted to rgb signal of the utility model passes through same
When setting signal converting unit, crystal oscillator unit, several filter units, reset unit, HDMI analog module supply voltage
VCC1V8, terminals POWER voltage VCC3V3, number I/O supply voltage VDD3V3, digital core supply voltage VDD1V8, HDMI letter
Number input unit, rgb video output unit, audio output unit and control module unit, each crystal oscillator unit, several filtering
Unit, reset unit, HDMI analog module supply voltage VCC1V8, terminals POWER voltage VCC3V3, number I/O supply voltage
VDD3V3, digital core supply voltage VDD1V8, HDMI signal input unit, rgb video output unit, audio output unit with
And control module unit is connected with each connectivity port signal processing module U1 of signal conversion unit, it can be achieved that from HDMI signal
Conversion to rgb signal communicates, and then does not have to replacement liquid crystal display die set or system board, and simple and convenient and integrated level is high, with
And have broad applicability (driving rgb interface display module, and system PC output end be HDMI or DVI signal.)
[Detailed description of the invention]
Fig. 1 is a kind of circuit connection diagram for the conversion circuit that HDMI signal is converted to rgb signal of the utility model.
Fig. 2 to Fig. 5 is followed successively by the electricity of the first filter unit, the second filter unit, third filter unit, the 4th filter unit
Road connection schematic diagram.
Fig. 6 is the circuit connection diagram of reset unit.
[specific embodiment]
To make the purpose of this utility model, technical solution and advantage are more clearly understood, with reference to the accompanying drawings and embodiments,
The present invention will be further described in detail.It should be appreciated that specific embodiment described herein is used only for explaining this
Utility model is not used to limit this utility model.
Fig. 1 to Fig. 6 is please referred to, a kind of conversion circuit 1 that HDMI signal is converted to rgb signal of the utility model includes letter
Number converting unit, crystal oscillator unit, several filter units, reset unit, HDMI analog module supply voltage VCC1V8, terminal electricity
Source voltage VCC3V3, number I/O supply voltage VDD3V3, digital core supply voltage VDD1V8, HDMI signal input unit,
Rgb video output unit, audio output unit and control module unit；The HDMI signal input unit include RXA_0- /+
(TMDSData0-/+)、RXA_1-/+(TMDSData1-/+)、RXA_2-/+(TMDSData2-/+)、RXA_C-/+
(TMDSClock- /+) signal end and HDCP slave serial clock terminal DDCA_SCL, HDCP slave serial clock terminal DDCA_SDA
And HDMI Port detecting end RXA_5V；The crystal oscillator unit includes first capacitor C1, the second capacitor C2 and crystal oscillator Y1, and crystal oscillator
The both ends of Y1 are separately connected the input terminal of first capacitor C1, the second capacitor C2, and the first capacitor C1 and the second capacitor C2 are opposite
In crystal oscillator Y1 another termination publicly；The signal conversion unit include signal processing module U1, HDMI signal receiving end,
Rgb video signal output end, audio signal output end and control signal receiving end；The filter unit includes being simulated by HDMI
First filter at the end modular power source voltage VCC1V8, third capacitor C3, the 4th capacitor C4, the 5th capacitor C5, the 6th capacitor C6 composition
Wave unit and by the end terminals POWER voltage VCC3V3, the 8th capacitor C8, the 9th capacitor C9, the tenth capacitor C10, the 11st capacitor
C11 composition the second filter unit and by the end digital core supply voltage VDD1V8, the 12nd capacitor C12, the 13rd capacitor
C13, the 14th capacitor C14, the 15th capacitor C15 composition third filter unit and by digital I/O supply voltage VDD3V3
The 4th filter unit that end, the 16th capacitor C16, the 17th capacitor C17, the 18th capacitor C18, the 19th capacitor C19 are formed；
The reset unit includes first resistor R1, the 7th capacitor C7, the digital core end supply voltage VDD1V8 and reset signal end
RSTN；The rgb video output unit include rgb signal line R0-R7, G0-G7, B0-B7, DEN, HSYNC, VSYNC, PCLK with
Signal conversion unit video signal output；The audio output unit includes audio signal audio_S/PDIF, audio_
SCLK, audio_LRCLK, audio_MCLK and signal conversion unit Digital audio output port S/PDIF, audio serial clock are defeated
Outlet SCLK, audio left/right output terminal of clock LRCLK and audio host clock output end MCLK；The control module unit
It is inserted including serial clock control terminal SCL, serial data control terminal SDA, interruption control terminal INT, digital control channel C EC and heat
Pull out signal detection end HPA_A.
The application passes through setting signal converting unit, crystal oscillator unit, several filter units, reset unit, HDMI simultaneously
Analog module supply voltage VCC1V8, terminals POWER voltage VCC3V3, number I/O supply voltage VDD3V3, digital core power supply
Voltage VDD1V8, HDMI signal input unit, rgb video output unit, audio output unit and control module unit, each crystalline substance
Shake unit, several filter units, reset unit, HDMI analog module supply voltage VCC1V8, terminals POWER voltage VCC3V3,
Digital I/O supply voltage VDD3V3, digital core supply voltage VDD1V8, HDMI signal input unit, rgb video output are single
Member, audio output unit and control module unit are connected with each connectivity port signal processing module U1 of signal conversion unit
It connects, it can be achieved that the conversion from HDMI signal to rgb signal communicates, and then does not have to replace liquid crystal display die set or system board, letter
Single convenient and integrated level is high, and have broad applicability (driving rgb interface display module, and system PC output end be HDMI or
DVI signal.)
Preferably, each third capacitor C3 in first filter unit, the 4th capacitor C4, the 5th capacitor C5, the 6th electricity
Hold C6 to be connected in parallel, and each third capacitor C3, the 4th capacitor C4, the 5th capacitor C5, the 6th one end capacitor C6 and HDMI simulate mould
The block end supply voltage VCC1V8 is connected, and another termination is publicly.
Preferably, each 8th capacitor C8 in second filter unit, the 9th capacitor C9, the tenth capacitor C10, the 11st
Capacitor C11 is connected in parallel, and each 8th capacitor C8, the 9th capacitor C9, the tenth capacitor C10, the 11st one end capacitor C11 and terminal
The end supply voltage VCC3V3 is connected, and another termination is publicly.
Preferably, each 12nd capacitor C12 in the third filter unit, the 13rd capacitor C13, the 14th capacitor
C14, the 15th capacitor C15 are connected in parallel, and each 12nd capacitor C12, the 13rd capacitor C13, the 14th capacitor C14, the tenth
Five one end capacitor C15 are connected with the end digital core supply voltage VDD1V8, and another termination is publicly.
Preferably, each 16th capacitor C16 in the 4th filter unit, the 17th capacitor C17, the 18th capacitor
C18, the 19th capacitor C19 are connected in parallel, and each 16th capacitor C16, the 17th capacitor C17, the 18th capacitor C18, the tenth
Nine one end capacitor C19 are connected with the end number I/O supply voltage VDD3V3, and another termination is publicly.
Compared with prior art, a kind of conversion circuit 1 that HDMI signal is converted to rgb signal of the utility model passes through same
When setting signal converting unit, crystal oscillator unit, several filter units, reset unit, HDMI analog module supply voltage
VCC1V8, terminals POWER voltage VCC3V3, number I/O supply voltage VDD3V3, digital core supply voltage VDD1V8, HDMI letter
Number input unit, rgb video output unit, audio output unit and control module unit, each crystal oscillator unit, several filtering
Unit, reset unit, HDMI analog module supply voltage VCC1V8, terminals POWER voltage VCC3V3, number I/O supply voltage
VDD3V3, digital core supply voltage VDD1V8, HDMI signal input unit, rgb video output unit, audio output unit with
And control module unit is connected with each connectivity port signal processing module U1 of signal conversion unit, it can be achieved that from HDMI signal
Conversion to rgb signal communicates, and then does not have to replacement liquid crystal display die set or system board, and simple and convenient and integrated level is high, with
And have broad applicability (driving rgb interface display module, and system PC output end be HDMI or DVI signal.)
Above-described the utility model embodiment, does not constitute the restriction to scope of protection of the utility model.It is any
Modifications, equivalent substitutions and improvements made within spirit of the present utility model and principle etc., should be included in the utility model
Claims within.
Claims (5)
1. a kind of conversion circuit that HDMI signal is converted to rgb signal, it is characterised in that: including signal conversion unit, crystal oscillator
Unit, several filter units, reset unit, HDMI analog module supply voltage VCC1V8, terminals POWER voltage VCC3V3, number
Word I/O supply voltage VDD3V3, digital core supply voltage VDD1V8, HDMI signal input unit, rgb video output unit,
Audio output unit and control module unit；The HDMI signal input unit include RXA_0- /+(TMDS Data 0-/
+)、RXA_1-/+(TMDS Data 1-/+)、RXA_2-/+(TMDS Data 2-/+)、RXA_C-/+(TMDS Clock-/+)
Signal end and the inspection of slave serial clock terminal DDCA_SCL, HDCP slave port serial clock terminal DDCA_SDA and HDMI HDCP
Survey end RXA_5V；The crystal oscillator unit includes first capacitor C1, the second capacitor C2 and crystal oscillator Y1, and the both ends of crystal oscillator Y1 connect respectively
The input terminal of first capacitor C1, the second capacitor C2 are connect, the first capacitor C1 and the second capacitor C2 are relative to the another of crystal oscillator Y1
Termination is publicly；The signal conversion unit includes signal processing module U1, HDMI signal receiving end, rgb video signal output
End, audio signal output end and control signal receiving end；The filter unit includes by HDMI analog module supply voltage
The end VCC1V8, third capacitor C3, the 4th capacitor C4, the 5th capacitor C5, the 6th capacitor C6 composition the first filter unit and by
The end terminals POWER voltage VCC3V3, the 8th capacitor C8, the 9th capacitor C9, the tenth capacitor C10, the 11st capacitor C11 composition the
Two filter units and by the end digital core supply voltage VDD1V8, the 12nd capacitor C12, the 13rd capacitor C13, the 14th electricity
Hold the third filter unit of C14, the 15th capacitor C15 composition and by the digital end I/O supply voltage VDD3V3, the 16th capacitor
The 4th filter unit that C16, the 17th capacitor C17, the 18th capacitor C18, the 19th capacitor C19 are formed；The reset unit
Including first resistor R1, the 7th capacitor C7, the digital core end supply voltage VDD1V8 and reset signal end RSTN；The RGB
Video output unit includes rgb signal line R0-R7, G0-G7, B0-B7, DEN, HSYNC, VSYNC, PCLK and signal conversion unit
Video signal output；The audio output unit includes audio signal audio_S/PDIF, audio_SCLK, audio_
LRCLK, audio_MCLK and signal conversion unit Digital audio output port S/PDIF, audio serial output terminal of clock SCLK, sound
Frequency left/right output terminal of clock LRCLK and audio host clock output end MCLK；The control module unit includes serial clock
Control terminal SCL, serial data control terminal SDA, control terminal INT, digital control channel C EC and hot plug signal detection end are interrupted
HPA_A。
2. a kind of conversion circuit that HDMI signal is converted to rgb signal as described in claim 1, it is characterised in that: described
Each third capacitor C3, the 4th capacitor C4, the 5th capacitor C5, the 6th capacitor C6 in first filter unit are connected in parallel, and each
Three capacitor C3, the 4th capacitor C4, the 5th capacitor C5, the 6th one end capacitor C6 and the end HDMI analog module supply voltage VCC1V8 phase
Even, another to terminate publicly.
3. a kind of conversion circuit that HDMI signal is converted to rgb signal as described in claim 1, it is characterised in that: described
Each 8th capacitor C8, the 9th capacitor C9, the tenth capacitor C10, the 11st capacitor C11 in second filter unit are connected in parallel, and
Each 8th capacitor C8, the 9th capacitor C9, the tenth capacitor C10, the 11st one end capacitor C11 and the end terminals POWER voltage VCC3V3 phase
Even, another to terminate publicly.
4. a kind of conversion circuit that HDMI signal is converted to rgb signal as described in claim 1, it is characterised in that: described
Each 12nd capacitor C12, the 13rd capacitor C13, the 14th capacitor C14, the 15th capacitor C15 in third filter unit is in parallel
Connection, and in each 12nd capacitor C12, the 13rd capacitor C13, the 14th capacitor C14, the 15th one end capacitor C15 and number
The nuclear-electric power supply end voltage VDD1V8 is connected, and another termination is publicly.
5. a kind of conversion circuit that HDMI signal is converted to rgb signal as described in claim 1, it is characterised in that: described
Each 16th capacitor C16, the 17th capacitor C17, the 18th capacitor C18, the 19th capacitor C19 in 4th filter unit is in parallel
Connection, and each 16th capacitor C16, the 17th capacitor C17, the 18th capacitor C18, the 19th one end capacitor C19 and number I/O
The end supply voltage VDD3V3 is connected, and another termination is publicly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821560460.XU CN208707782U (en) | 2018-09-25 | 2018-09-25 | A kind of conversion circuit that HDMI signal is converted to rgb signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821560460.XU CN208707782U (en) | 2018-09-25 | 2018-09-25 | A kind of conversion circuit that HDMI signal is converted to rgb signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208707782U true CN208707782U (en) | 2019-04-05 |
Family
ID=65947251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821560460.XU Active CN208707782U (en) | 2018-09-25 | 2018-09-25 | A kind of conversion circuit that HDMI signal is converted to rgb signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208707782U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110459154A (en) * | 2019-07-31 | 2019-11-15 | 深圳康佳电子科技有限公司 | A kind of display screen interface signal conversion circuit, device and method |
-
2018
- 2018-09-25 CN CN201821560460.XU patent/CN208707782U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110459154A (en) * | 2019-07-31 | 2019-11-15 | 深圳康佳电子科技有限公司 | A kind of display screen interface signal conversion circuit, device and method |
| CN110459154B (en) * | 2019-07-31 | 2022-12-20 | 深圳康佳电子科技有限公司 | Display screen interface signal conversion circuit, device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205232386U (en) | An apparatus for detecting an audio return function of a HDMI interface | |
| US10339090B2 (en) | System for implementing MXM on a PCI card | |
| US10866915B2 (en) | Method for increasing the compatibility of displayport | |
| CN105491421B (en) | A kind of Wireless TV based on Type-C interfaces | |
| CN102664873A (en) | Method for realization of KVM-OVER-IP of domestic Loongson CPU server with BMC | |
| CN106686332A (en) | Video display control method and EDID management method | |
| CN104967806B (en) | Switching circuit based on HDMI | |
| CN204539303U (en) | HDMI (High Definition Multimedia Interface) with multiplexing function and television set | |
| CN208707782U (en) | A kind of conversion circuit that HDMI signal is converted to rgb signal | |
| CN201583942U (en) | Device for online writing EDID by USB | |
| CN201655249U (en) | Integrated audio/video controller for LED display | |
| CN205265858U (en) | TV set of configuration USB interface adapter | |
| CN202677260U (en) | Computer and display card and mainboard thereof | |
| CN206274660U (en) | A kind of processing system for video | |
| CN209071781U (en) | Display screen connecting line, display screen and computer equipment | |
| CN203457237U (en) | HDMI-based signal distributor | |
| CN202041946U (en) | Display circuit module | |
| CN203104645U (en) | Converter for converting VGA (Video Graphics Array) signal into HDMI (High Definition Multimedia Interface) signal | |
| CN213582143U (en) | USB external display card | |
| CN201045695Y (en) | Signal processing circuit for VGA interface and television set equipped with the same | |
| CN201845537U (en) | Video interface format conversion equipment | |
| CN201887276U (en) | HDMI high definition digital network cable transmission extender | |
| CN202583953U (en) | Industrial control mainboard with multiple display interface | |
| CN104346245A (en) | Color testing system | |
| CN202798972U (en) | HDMI (high-definition multimedia interface) recognition circuit and television |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |