CN1963912A - Driving control circuit of LCD - Google Patents
Driving control circuit of LCD Download PDFInfo
- Publication number
- CN1963912A CN1963912A CN 200610157049 CN200610157049A CN1963912A CN 1963912 A CN1963912 A CN 1963912A CN 200610157049 CN200610157049 CN 200610157049 CN 200610157049 A CN200610157049 A CN 200610157049A CN 1963912 A CN1963912 A CN 1963912A
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- control circuit
- microprocessor
- driving control
- lcd
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- Liquid Crystal Display Device Control (AREA)
Abstract
This invention discloses one LCD drive control circuit, which comprises technique problem to strengthen level and vertical contract processing image property and to optimization display quality. This invention adopts the following scheme: one LCD display drive control circuit with control circuit to output signal to LCD display and microphone; the said control circuit is of micro processor connected with display card input circuit, digital visual input circuit.
Description
Technical field
The present invention relates to the Drive and Control Circuit of a kind of LCD, particularly a kind of LCD.
Background technology
LCD is through the development of nearly more than ten years, come into common people house, no matter be electronic calculator, mobile phone, still computer, television indicator are seen everywhere, the profile of its high-quality image effect and fashion, be subjected to user's welcome, can think so that demonstration field future will be the world of LCD.The driving control circuit of LCD complex structure of prior art, peripheral cell is more, has increased cost; Can not adapt to the display screen of different size ratio on the market, color is not very gorgeous, clear aspect visual, when input imagery resolution can not be reappeared during greater than the resolution of display screen well, can not online program upgrade, increase secondary processing workload and difficulty, thereby can not satisfy the requirement of liquid crystal display-driving control.
Summary of the invention
The purpose of this invention is to provide a kind of driving control circuit of LCD, the technical matters that solve is the ability that enhanced level and vertically scale are handled image, optimizes the display quality of image.
The present invention is by the following technical solutions: a kind of driving control circuit of LCD, has control circuit, the signal of control circuit output is to LCD and loudspeaker, described control circuit is a microprocessor, and the Low Voltage Differential Signal of microprocessor output passes through the low-voltage differential output interface to LCD.
Microprocessor of the present invention connects video card input circuit, digital video input circuit, note amplifier, EEPROM (Electrically Erasable Programmable Read Only Memo) and keyboard, and described note amplifier connects audio frequency input circuit and audio output circuit.
Driving control circuit of LCD of the present invention has power supply.
Microprocessor of the present invention adopts NT68663-64.
The video card seat of video card input circuit of the present invention adopts 1216-064-15S-AAC, and the 15th, 12 pin connect the 24th, 25 pin of microprocessor, and the Connection Block of digital video input circuit adopts CON-DVI, and the 6th, 7 pin connect the 26th, 27 pin of microprocessor.
Low-voltage differential output interface of the present invention adopts HP2.0-15X2, and the 61st to 81 pin of microprocessor is connected with display screen by the low-voltage differential output interface.
Sound signal of the present invention is divided into left and right two sound channels by audio frequency seat input, through audio signal amplifier to the loudspeaker output audio signal.
EEPROM (Electrically Erasable Programmable Read Only Memo) of the present invention adopts 24LC16B, and 5,6,7 pin connect the 39th, 59,60 pin of microprocessor.
Keyboard of the present invention adopts array button or AD type button, and the 22nd, 23,33,36,44,45 pin of microprocessor connect keyboard.
Power supply direct current jack input 12V direct supply of the present invention, provide 12V power supply through electric power management circuit to note amplifier, provide 3.3V and 1.8V power supply to microprocessor, provide 5V power supply to EEPROM (Electrically Erasable Programmable Read Only Memo), 3.3V, 5V and 12V power supply are provided for the Low Voltage Differential Signal output circuit.
The present invention compared with prior art, control circuit adopts microprocessor, the Low Voltage Differential Signal of microprocessor output passes through the low-voltage differential output interface to LCD, the level and the vertically scale that strengthen control circuit are handled visual ability, optimize the display quality of image, thereby raising driving control circuit of LCD image-capable, can drive the LCD of various levels and vertical scale, support that resolution reaches 1900 * 1200 LCD.
Description of drawings
Fig. 1 is the circuit block diagram of the embodiment of the invention.
Fig. 2 is the circuit theory diagrams of the embodiment of the invention.
Fig. 2-the 1st, the partial enlarged drawing of Fig. 2 ().
Fig. 2-the 2nd, the partial enlarged drawing of Fig. 2 (two).
Fig. 2-the 3rd, the partial enlarged drawing of Fig. 2 (three).
Fig. 2-the 4th, the partial enlarged drawing of Fig. 2 (four).
Fig. 2-the 5th, the partial enlarged drawing of Fig. 2 (five).
Fig. 2-the 6th, the partial enlarged drawing of Fig. 2 (six).
Fig. 2-the 7th, the partial enlarged drawing of Fig. 2 (seven).
Fig. 2-the 8th, the partial enlarged drawing of Fig. 2 (eight).
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail.As shown in Figure 1, driving control circuit of LCD of the present invention has microprocessor MCU, and microprocessor MCU connects video card VGA input circuit, digital video DVI input circuit, note amplifier, EEPROM (Electrically Erasable Programmable Read Only Memo), Low Voltage Differential Signal output circuit and keyboard; Note amplifier connects audio frequency input circuit and audio output circuit; The 12V direct supply provides 12V power supply through electric power management circuit to note amplifier, 3.3V and 1.8V power supply are provided for microprocessor MCU, provide 5V power supply to EEPROM (Electrically Erasable Programmable Read Only Memo), 3.3V, 5V and 12V power supply are provided for the Low Voltage Differential Signal output circuit.
As shown in Figure 2, driving control circuit of LCD of the present invention has two road input signals respectively, and a route 15 pin VGA seats input to microprocessor MCU U100 with simulating signal, and another route 24 pin DVI seats input to microprocessor MCU U100 with digital signal.Microprocessor MCU U100 adopts NT68663-64, after the signal input, handled and changed by microprocessor MCU U100, the 61st to 81 pin is exported low-voltage differential LVDS signal at last, carry connected display screen PANEL by low-voltage differential output interface CN109, thereby image is shown.Sound signal can be divided into left and right two sound channels, and be sent into and carry out processing and amplifying among the audio signal amplifier U300 by audio frequency seat CN301 input, finally exports the sound signal of 2 * 2W, promotes external loudspeaker and makes sound reproduction; 6 pin of audio signal amplifier and 12 pin connect 50 pin and 41 pin of microprocessor.Power supply is partly by direct current DC socket CN500 input 12V DC power supply, after the 500 electrochemical capacitor C500 filtering, one the tunnel is directly exported by socket CN502, be external PANEL hardboard power supply, after another routing power step-down chip U500 AP1509-50 step-down is handled, one+5V of output direct current DC stabilized voltage supply, this 5V power supply one tunnel is directly given storer U10124LC16B power supply, after the secondary route power supply IC Q502 SI9435 control, for display screen PANEL provides stable 5V dc voltage, Third Road is by step-down IC U501, U502 carries out step-down again, and the direct current dc voltage that produces 3.3V and 1.8V respectively provides high-quality power supply for MCU.The program data typing can be imported by the VGA seat, directly call in MCU and the 24C16 storer is stored by burning program, just can tackle the demand of client's difference requirement by VGA seat direct burning without the teardown of engine, when if the client need change software because of temporary changes, can directly change software without the teardown of engine by the VGA seat, make things convenient for factory's pipelining, the trouble of avoiding greatly doing over again and bringing has improved production efficiency.
The stimulus part of driving control circuit of LCD of the present invention, comprise that by computer input rgb signal and DVI digital signal (the one tunnel does the VGA input in two passage three primary colors RGB input, the input of DVI-A is supported on another road), (one is used for the VGA input for input of DVI signal and the input of two Direct Digital control DDC passages, another is used for DVI input) the video card seat of video card input circuit adopts 1216-064-15S-AAC, the 15th of VGA seat, 12 pin meet MCU the 24th, 25 pin, the Connection Block of digital video input circuit adopts CON-DVI, DVI seat 6,7 pin meet MCU the 26th, 27 pin.The signal of VGA and DVI input is by analog to digital converter ADC front end at a high speed, be that microprocessor U100 the 97th, 98,100,101,103,104,106,107,113,116,118 pin are handled, the programmable simulating signal of 500MHz, bandwidth and 8 ADC of obtaining from U100 sample, automatically adjust clock and the phase place that the U100 chip internal is handled the ADC sampling, thereby reach best display effect.Support interlacing and signal line by line simultaneously, microprocessor internal has No. 3 analog to digital converter ADC/ phase-locked loop PLL, and the 500M bandwidth is wider to non-standard level signal adaptability.
The image processing section of driving control circuit of LCD of the present invention, microprocessor has 4 road 7-BIT AD control signal processing poweies, can reach clear bright display effect, microprocessor can convert automatically according to level and vertical scale, therefore have independently convergent-divergent processing, can handle the display mode of VGA to the different resolutions of UXGA; 10 bit width GAMMA treatment for correcting functions of microprocessor, make this circuit have the adjustment Show Color of 10 bit widths and the color distinction GAMMA treatment for correcting of actual output, can Show Color and the gray scale of display screen PANEL be compensated, and have adaptive noise and eliminate ability, the interpolation algorithm function of microprocessor makes image more level and smooth, clear.
The segment signal output of driving control circuit of LCD of the present invention, by the 61st to the 81 pin order passage of microprocessor or the interface of binary channels LVDS type, changing clock spectrum by the update routine control microprocessor launches, can open up control frequently, to obtain preferable anti-electromagnetic interference (EMI) EMI characteristic, the the 61st to 81 pin of microprocessor can change the microprocessor definition of pin position by programmed control, possesses programmable output channel function of exchange, also can change microprocessor the 61st to 81 pin output signal polarity by program, make programmable LVDS output signal positive-negative polarity change function, can tackle different model, the display screen of distinct interface, thereby improved the adaptability of product widely, 3.3V, 5V and the output of 12V three road high stability dc power supplies can adapt to the dissimilar display screen PANEL in market.
The audio-frequency unit of driving control circuit of LCD of the present invention is divided into the stereo input of single channel, stereo amplification output, volume and quietly import by audio frequency seat CN301 by MCU control audio signal, can be divided into left and right two sound channels, and send in audio signal amplifier U300 the 4th, 9 pin and carry out processing and amplifying, by the sound signal of U300 the 14th, 17 pin output 2 * 2W, promote external loudspeaker and make sound reproduction, directly convenient.
The operation of driving control circuit of LCD of the present invention and screen menu type are regulated the OSD part, MCU has 6 I/O input pins as operation-interface: U100 the 22nd, 23,33,36,44,45 pin, be connected to the external key plate, adopt the array button then can connect 9 input buttons, if adopt AD type button, then can surpass the bond number of pressing more than 30.U100 the 22nd, 23,33,36,44,45 pin are connected to the external key plate and support the two paths of LED prompting, because U100 the 46th, 47 pin are connected to the external key plate, can make mode of operation more flexible, adapt to different market.The number of LED display mode, button and the function of button can realize that by the program setting of MCU convenient and swift, adaptability is strong according to the requirements set of using; OSD partly provides the synchronous DRAM SDRAM of 12K word, and maximum can show 2048 characters simultaneously, can show 4 subwindows simultaneously, supports the character of double-colored, 4 looks and 16 looks to show that make the OSD menu beautiful in colour, stereovision is stronger.The shade of OSD menu uniqueness and flange are controlled, translucent display effect is handled and the dynamic effect of support diagonal stretch, have greatly enriched the intension of OSD menu vision, have adapted to the different clients of power that view and admire fully.
Driving control circuit of LCD of the present invention has program and can be imported by the VGA seat, directly call in MCU and the 24C16 storer is stored online programmable I SP function by burning program, even make finished product, under the condition of not dismantling casing, also can finish the renewal of program, bring very big dirigibility for production and manufacturer, improved efficient greatly.
Driving control circuit of LCD wiring of the present invention is reasonable, and element distributes proper, thereby has improved global reliability and security greatly.High integrated single-chip is used, and has reduced peripheral cell, thereby has saved manufacturing cost, has improved efficient.
Claims (10)
1. driving control circuit of LCD, has control circuit, the signal of control circuit output is to LCD and loudspeaker, and it is characterized in that: described control circuit is a microprocessor, and the Low Voltage Differential Signal of microprocessor output passes through the low-voltage differential output interface to LCD.
2. driving control circuit of LCD according to claim 1, it is characterized in that: described microprocessor connects video card input circuit, digital video input circuit, note amplifier, EEPROM (Electrically Erasable Programmable Read Only Memo) and keyboard, and described note amplifier connects audio frequency input circuit and audio output circuit.
3. driving control circuit of LCD according to claim 2 is characterized in that: described driving control circuit of LCD has power supply.
4. driving control circuit of LCD according to claim 3 is characterized in that: described microprocessor adopts NT68663-64.
5. driving control circuit of LCD according to claim 4, it is characterized in that: the video card seat of described video card input circuit adopts 1216-064-15S-AAC, 15th, 12 pin connect the 24th, 25 pin of microprocessor, the Connection Block of digital video input circuit adopts CON-DVI, and the 6th, 7 pin connect the 26th, 27 pin of microprocessor.
6. driving control circuit of LCD according to claim 5 is characterized in that: described low-voltage differential output interface adopts HP2.0-15X2, and the 61st to 81 pin of microprocessor is connected with display screen by the low-voltage differential output interface.
7. driving control circuit of LCD according to claim 6 is characterized in that: described sound signal is divided into left and right two sound channels by audio frequency seat input, through audio signal amplifier to the loudspeaker output audio signal.
8. driving control circuit of LCD according to claim 7 is characterized in that: described EEPROM (Electrically Erasable Programmable Read Only Memo) adopts 24LC16B, and 5,6,7 pin connect the 39th, 59,60 pin of microprocessor.
9. driving control circuit of LCD according to claim 8 is characterized in that: described keyboard adopts array button or AD type button, and the 22nd, 23,33,36,44,45 pin of microprocessor connect keyboard.
10. driving control circuit of LCD according to claim 9, it is characterized in that: described power supply direct current jack input 12V direct supply, provide 12V power supply through electric power management circuit to note amplifier, provide 3.3V and 1.8V power supply to microprocessor, provide 5V power supply to EEPROM (Electrically Erasable Programmable Read Only Memo), 3.3V, 5V and 12V power supply are provided for the Low Voltage Differential Signal output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610157049 CN1963912A (en) | 2006-11-27 | 2006-11-27 | Driving control circuit of LCD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610157049 CN1963912A (en) | 2006-11-27 | 2006-11-27 | Driving control circuit of LCD |
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| CN1963912A true CN1963912A (en) | 2007-05-16 |
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| CN 200610157049 Pending CN1963912A (en) | 2006-11-27 | 2006-11-27 | Driving control circuit of LCD |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106878650A (en) * | 2017-04-13 | 2017-06-20 | 公安部第研究所 | A kind of DVI to VGA video change-over devices and its method |
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2006
- 2006-11-27 CN CN 200610157049 patent/CN1963912A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106878650A (en) * | 2017-04-13 | 2017-06-20 | 公安部第研究所 | A kind of DVI to VGA video change-over devices and its method |
| CN106878650B (en) * | 2017-04-13 | 2023-06-20 | 公安部第一研究所 | DVI to VGA video conversion device and method thereof |
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