CN202838923U - Minitype near-eye display connector drive and control circuit structure - Google Patents
Minitype near-eye display connector drive and control circuit structure Download PDFInfo
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- CN202838923U CN202838923U CN 201220527437 CN201220527437U CN202838923U CN 202838923 U CN202838923 U CN 202838923U CN 201220527437 CN201220527437 CN 201220527437 CN 201220527437 U CN201220527437 U CN 201220527437U CN 202838923 U CN202838923 U CN 202838923U
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Abstract
A minitype near-eye display connector drive and control circuit structure comprises a red-green-blue (RGB) analog signal processing circuit module, a digital signal processing circuit module and a multi-potential output voltage source circuit module. The RGB analog signal processing circuit module comprises a video graphics array (VGA) interface connector and three analog video processing circuits with the same structure, wherein the three channel analog video processing circuits can be controlled to achieve amplification of analog signals and enhancement of drive capability. The digital signal processing circuit module comprises a complex programmable logic device (CPLD) and a crystal oscillator. According to the minitype near-eye display connector drive and control circuit structure, expensive and special chips used in a regular control-driven circuit, such as a picture decoding chip and a single chip microcomputer system chip, are eliminated, and therefore production cost is greatly reduced. Due to the fact that the CPLD is adopted as the core of the digital signal processing circuit module, the code of the CPLD can be amended appropriately to adapt to the resolution ratio of the digital signal processing circuit module, and generality of the minitype near-eye display connector drive and control circuit structure is improved.
Description
Technical field
The utility model belongs to a kind of miniature near-to-eye interface driver control circuit applied technical field, particularly relate to a kind of level of integrated system height of can accomplishing and to satisfy again integrality and the stability requirement of demonstration, because avoiding using the special-purpose decoding integrated circuit of video, reduce a kind of miniature near-to-eye interface driver control circuit structure of Overall Power Consumption again.
Background technology
The portable mobile communication that emerges rapidly in recent years and Wireless Display product increase increasingly to the demand of color near-eye display system, and the intrinsic advantage of color near-eye display system has determined the development prospect of mobile display product.Wherein the driving circuit of color near-eye display and control display method thereof are key point, the display driver circuit of existing simulating color near-eye LCD is in order to realize more various and gorgeous function, adopted the IC chip of polytype function, mainly contain the image decoding chip, the display drive signals control chip, the configuration singlechip chip, display driver power amplifier amplifier module, multi-power module, passive configuration electronic devices and components etc., circuit structure is comparatively complicated, cause thus system's complete machine high cost, system power dissipation is higher, complete machine bulk is huge, thereby has weakened the near-to-eye low-power consumption, small size, portable advantage.
Therefore how to simplify the display driver circuit of analogue type color near-eye display, the advantage of giving full play to near-to-eye low-power consumption, small size, portability is the important subject of present nearly eye display technique.
Summary of the invention
The purpose of this utility model is to solve comparatively complexity of existing simulating color near-eye LCD circuit structure, cause thus system's complete machine high cost, system power dissipation is higher, complete machine bulk is huge problem, provide a kind of level of integrated system height of can accomplishing to satisfy again integrality and the stability requirement of demonstration, because avoiding using the special-purpose decoding integrated circuit of video, reduce a kind of miniature near-to-eye interface driver control circuit structure of Overall Power Consumption again.
The miniature near-to-eye interface driver control circuit structure that the utility model provides comprises: RGB analog signal processing circuit module, enable the digital signal processing circuit module that the useful signal line links to each other with RGB analog signal processing circuit module by amplifier, and link to each other with the digital signal processing circuit module with RGB analog signal processing circuit module respectively and required many current potentials output voltage source chip of current potential more than 2 kinds is provided.
Described RGB analog signal processing circuit module comprises: the VGA interface connector that directly links to each other with the RGB output interface of computing machine, the output terminal of VGA interface connector is respectively arranged with red primary analog output signal line, green primary analog output signal line, blue primary analog output signal line, and initial row synchronizing signal output line, initial fields synchronizing signal output line; 3 identical analog video treatment circuits of structure are connected respectively to red primary analog output signal line, green primary analog output signal line or blue primary analog output signal line.3 tunnels analogy video processing circuitss can controlledly be finished amplification and the driving force enhancing function of simulating signal.
Described analog video treatment circuit includes: be arranged at least 1 operational amplifier on the same chip, and the enable port of at least 1 operational amplifier enables the useful signal line with described amplifier and is connected.
Described many current potentials output voltage source chip is supplied with, electric energy is provided, electric energy is provided, provides stable drive current by the constant current output drive wire for the led light source of simulating color near-eye LCD to RGB analog signal processing circuit module by the 10V power lead to CPLD by the 3.3V power lead by 4.5V DC voltage input line external power supply respectively.
Described digital signal processing circuit module includes CPLD and crystal oscillator, and described crystal oscillator is connected to CPLD by the crystal oscillator output line.Described CPLD by field sync signal output line, line synchronizing signal output line be connected with RGB analog signal processing circuit module, by described amplifier enable the useful signal line respectively the analog video treatment circuit identical with 3 structures link to each other, link to each other with the VGA interface connector with initial fields synchronizing signal output line by initial row synchronizing signal output line.
Advantage of the present utility model and beneficial effect:
(1) reduced production cost from two aspects: abandoned on the one hand the expensive special chips such as the image decoding chip that uses the conventional control driving circuit, display drive signals control chip, singlechip chip, the pcb board for preparing on the other hand control driving circuit described in the utility model can reduce to 4 laminates from 6 laminates, thereby has significantly saved production cost;
(2) minimizing of the minimizing of quantity of integrated circuit chips and the pcb board number of plies has reduced weight and the spatial volume of controlling driving circuit;
(3) owing to having adopted and made digital signal processing module take CPLD as core, so just can be different according to the resolution of simulating color near-eye LCD, code by suitable modification CPLD adapts to its resolution, thereby has strengthened versatility of the present utility model.
Description of drawings
Fig. 1 is the block diagram of a kind of miniature near-to-eye interface driver control circuit structure of the present utility model;
Wherein:
1:CPLD 2: initial row synchronizing signal output line
3: crystal oscillator 4: initial fields synchronizing signal output line
5: blue primary analog output signal line 6:VGA interface connector
7: red primary analog output signal line 8: green primary analog output signal line
9:10V/3.3V dual power supply chip 10: voltage source configuration circuit
11: many current potentials output voltage source chip 12: dividing potential drop configuration circuit
13:4.5V DC voltage input line 14:3.3V pressure-wire
15: constant current output drive wire 16:5V pressure-wire
17:10V pressure-wire 18: analog video operational amplification circuit
20: red primary driver output line 22: green primary driver output line
24: blue primary driver output line 25:RGB analog signal processing circuit module
26: field sync signal output line 27: the line synchronizing signal output line
28: pixel clock signal output line 29: amplifier enables the useful signal line
31: crystal oscillator output line 32: the digital signal processing circuit module.
Embodiment
For further understanding summary of the invention of the present utility model, Characteristic, hereby enumerate following examples, and cooperate accompanying drawing to describe the miniature near-to-eye interface driver control circuit structure that the utility model provides in detail.
As shown in Figure 1, miniature near-to-eye interface driver control circuit structure of the present utility model, include RGB analog signal processing circuit module 25, enable the digital signal processing circuit module 32 that useful signal line 29 links to each other with RGB analog signal processing circuit module 25 by amplifier, and be connected to it with RGB analog signal processing circuit module 25 and digital signal processing circuit module 32 respectively required many current potentials output voltage source chip 11 of current potential, at least a kind of steady current more than 2 kinds is provided.
Described RGB analog signal processing circuit module 25 comprises: the VGA interface connector 6 that directly links to each other with the RGB output interface of computing machine, the analog video treatment circuit 18 that 3 structures that link to each other with VGA interface connector 6 respectively are identical.3 tunnels analogy video processing circuitss 18 can controlledly be finished amplification and the driving force enhancing function of simulating signal.
Described VGA interface connector 6 directly accesses the RGB output interface of computing machine; The output terminal of described VGA interface connector 6 is provided with red primary analog output signal line 7, green primary analog output signal line 8, the blue primary analog output signal line 5 that is connected respectively on identical analog video treatment circuit 18 passages of 3 structures, and the initial row synchronizing signal output line 2, the initial fields synchronizing signal output line 4 that are connected to simultaneously CPLD 1.
Described analog video treatment circuit 18 includes at least 1 operational amplifier that is arranged on the same chip, and the enable port of at least 1 operational amplifier enables useful signal line 29 with described amplifier and is connected.
Described many current potentials output voltage source chip 11 is supplied with, electric energy is provided, electric energy is provided, provides stable drive current by constant current output drive wire 15 for the led light source of simulating color near-eye LCD to RGB analog signal processing circuit module 25 by 10V power lead 17 to CPLD 1 by 3.3V power lead 14 by 4.5V DC voltage input line 13 external power supplys respectively.
Described digital signal processing circuit module 32 includes CPLD(Complex Programmable Logic Device, CPLD) 1 and crystal oscillator 3, described crystal oscillator 3 is connected to CPLD 1 by crystal oscillator output line 31.Described CPLD 1 has and is no less than 34 effective incoming/outgoing legs, is no less than 72 macroelements, the chip system frequency of operation can reach that 150MHz is above, chip power voltage 3.3V.
Described CPLD 1 by field sync signal output line 26, line synchronizing signal output line 27 be connected with RGB analog signal processing circuit module 25, by described amplifier enable useful signal line 29 respectively the analog video treatment circuit 18 identical with 3 structures link to each other, link to each other with VGA interface connector 6 with initial fields synchronizing signal output line 4 by initial row synchronizing signal output line 2.
Claims (5)
1. miniature near-to-eye interface driver control circuit structure, it is characterized in that described circuit structure comprises: RGB analog signal processing circuit module, enable the digital signal processing circuit module that the useful signal line links to each other with RGB analog signal processing circuit module by amplifier, and link to each other with the digital signal processing circuit module with RGB analog signal processing circuit module respectively and required many current potentials output voltage source chip of current potential more than 2 kinds is provided.
2. circuit structure according to claim 1, it is characterized in that described RGB analog signal processing circuit module comprises: the VGA interface connector that directly links to each other with the RGB output interface of computing machine, the output terminal of VGA interface connector is respectively arranged with red primary analog output signal line, green primary analog output signal line, blue primary analog output signal line, and initial row synchronizing signal output line, initial fields synchronizing signal output line; 3 identical analog video treatment circuits of structure are connected respectively to red primary analog output signal line, green primary analog output signal line or blue primary analog output signal line.
3. circuit structure according to claim 2, it is characterized in that described analog video treatment circuit includes: be arranged at least 1 operational amplifier on the same chip, and the enable port of at least 1 operational amplifier enables the useful signal line with described amplifier and is connected.
4. circuit structure according to claim 1 is characterized in that described digital signal processing circuit module includes CPLD and crystal oscillator, and described crystal oscillator is connected to CPLD by the crystal oscillator output line; Described CPLD by field sync signal output line, line synchronizing signal output line be connected with RGB analog signal processing circuit module, by described amplifier enable the useful signal line respectively the analog video treatment circuit identical with 3 structures link to each other, link to each other with the VGA interface connector with initial fields synchronizing signal output line by initial row synchronizing signal output line.
5. circuit structure according to claim 1 is characterized in that described many current potentials output voltage source chip supplies with, electric energy is provided, electric energy is provided, provides stable drive current by the constant current output drive wire for the led light source of simulating color near-eye LCD to RGB analog signal processing circuit module by the 10V power lead to CPLD by the 3.3V power lead by 4.5V DC voltage input line external power supply respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220527437 CN202838923U (en) | 2012-10-16 | 2012-10-16 | Minitype near-eye display connector drive and control circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220527437 CN202838923U (en) | 2012-10-16 | 2012-10-16 | Minitype near-eye display connector drive and control circuit structure |
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| Publication Number | Publication Date |
|---|---|
| CN202838923U true CN202838923U (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220527437 Expired - Fee Related CN202838923U (en) | 2012-10-16 | 2012-10-16 | Minitype near-eye display connector drive and control circuit structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103854625A (en) * | 2014-03-28 | 2014-06-11 | 江苏理工学院 | liquid crystal display device based on CPLD and display method thereof |
| CN109714500A (en) * | 2019-01-17 | 2019-05-03 | 中孚信息股份有限公司 | A kind of VGA video unidirectional transmission method and device |
-
2012
- 2012-10-16 CN CN 201220527437 patent/CN202838923U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103854625A (en) * | 2014-03-28 | 2014-06-11 | 江苏理工学院 | liquid crystal display device based on CPLD and display method thereof |
| CN103854625B (en) * | 2014-03-28 | 2016-03-30 | 江苏理工学院 | liquid crystal display device based on CPLD and display method thereof |
| CN109714500A (en) * | 2019-01-17 | 2019-05-03 | 中孚信息股份有限公司 | A kind of VGA video unidirectional transmission method and device |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20131016 |