CN2627612Y - Equipment for regulating LCD contrast - Google Patents
Equipment for regulating LCD contrast Download PDFInfo
- Publication number
- CN2627612Y CN2627612Y CN 03226384 CN03226384U CN2627612Y CN 2627612 Y CN2627612 Y CN 2627612Y CN 03226384 CN03226384 CN 03226384 CN 03226384 U CN03226384 U CN 03226384U CN 2627612 Y CN2627612 Y CN 2627612Y
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- China
- Prior art keywords
- lcd
- pin
- contrast
- described digital
- regulation resistance
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Abstract
The utility model discloses a LCD contrast adjusting device, aiming to solve the problem with the current adjusting device about inconvenient usage and incorrect adjustment. The utility model includes a digital adjusting circuit (2) connected with a power supply source, a first switch SW1 and a second switch SW2. An output end and an input end of the digital adjusting circuit are connected with a contrast adjusting end (11) and a ground terminal (12) of the LCD. A plus count input end (21) and a down count input end (22) of the digital adjusting circuit are connected with the first switch SW1 and the second switch SW2 respectively. By adopting the digital adjusting circuit, the utility model can more conveniently set up the first switch SW1 and the second switch SW2 of contrast adjustment on the front side of the LCD or other convenient position in operator's opinion. The utility model has advantages of correct and convenient operation and wider application range and is applicable to most LCDs.
Description
Technical field
The utility model relates to a kind of display contrast's regulating device, especially in the injection machine control display device, to the regulating device of the demonstration contrast of LCD.
Background technology
In the injection machine industry, the display device of traditional controller of plastic injection molding is a CRT monitor, after carrying out the transition to liquid crystal display displays, need to regulate the demonstration contrast, existing demonstration contrast mode generally adopts analog regulation, promptly by regulating the contrast that analog adjustable potentiometer (VR) is regulated display, owing to be subjected to the restriction of adjustable potentiometer self structure, its adjustable end generally all is installed in the back side of LCD, when regulating adjustable potentiometer VR, need the operator when display is charged, its analog regulation part is regulated in winding by hand to the behind of display, even also to use adjustment means such as screwdriver, use very inconvenient.
Summary of the invention
Technical problem to be solved in the utility model is intended to propose a kind of regulating device of LCD contrast easy to use.
According to the utility model, a kind of regulating device of LCD contrast, described LCD comprises an adjustable end of contrast, earth terminal, it is characterized in that: the regulating device of described LCD contrast comprises a digital regulated circuit that joins with power supply, first switch SW 1 and second switch SW2, the output terminal of described digital regulated circuit, input low side join with the adjustable end of the contrast of described LCD, earth terminal respectively; Described digital regulated circuit comprise a digital regulation resistance U1 and its auxiliary circuit, the plus coujnt input end of described digital regulation resistance U1, subtraction counting input end join with described first switch SW 1, second switch SW2 respectively, the equal ground connection of an other end of described first switch SW 1 and second switch SW2.
Because the utility model adopts digital regulated mode to replace original analog regulation mode, contrast to LCD is adjusted, positive or other operators that can be easily first switch SW 1, the second switch SW2 that adjusts contrast be arranged on LCD think position comparatively easily, thereby it was both accurate to operate, convenient again.
The purpose of this utility model, feature and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
Description of drawings
Fig. 1 is the circuit block diagram of the regulating device of the utility model LCD contrast;
Fig. 2 is the circuit block diagram of first kind of embodiment of regulating device of the utility model LCD contrast;
Fig. 3 is the circuit theory diagrams of first kind of embodiment of regulating device of the utility model LCD contrast;
Fig. 4 is the circuit theory diagrams of second kind of embodiment of regulating device of the utility model LCD contrast;
Fig. 5 is the circuit theory diagrams of the third embodiment of regulating device of the utility model LCD contrast;
Fig. 6 is the circuit theory diagrams of the 4th kind of embodiment of regulating device of the utility model LCD contrast.
Concrete embodiment
With reference to Fig. 1, a kind of regulating device of LCD contrast, described LCD 1 comprises an adjustable end 11 of contrast, earth terminal 12, the regulating device of described LCD contrast comprises a digital regulated circuit 2 that joins with power supply, first switch SW 1 and second switch SW2, the output terminal of described digital regulated circuit, input low side join with the adjustable end 11 of the contrast of described LCD, earth terminal 12 respectively; The plus coujnt input end 21 of described digital regulated circuit, subtraction counting input end 22 join with described first switch SW 1, second switch SW2 respectively, the equal ground connection of an other end of described first switch SW 1 and second switch SW2.
Refer again to the circuit block diagram of first kind of embodiment of the present utility model, be Fig. 2, shown LCD is the LCD that carries positive voltage output, its positive voltage output end 13 is as the power supply of described digital regulated circuit, it is digital regulation resistance U2 and the auxiliary circuit thereof of X9511 that described digital regulated circuit adopts model, as shown in Figure 3, the PU pin of described digital regulation resistance U2, PD pin are respectively as plus coujnt input end 21, the subtraction counting input end 22 of digital regulated circuit.The VH pin of described digital regulation resistance U2, VCC pin join through the positive voltage output end 13 of first resistance R 1, second resistance R 2 and described LCD respectively, be that LCD carries malleation and (carries negative pressure, reason is the same), just can be on the output voltage of LCD direct dividing potential drop; The VW pin of described digital regulation resistance U2 joins as the output terminal of described digital regulated circuit and the adjustable end 11 of contrast of described LCD, and the VL pin of described digital regulation resistance U2, ASE pin, GND pin join as the input low side of described digital regulated circuit and the earth terminal 12 of described LCD.Contrast by the first push switch SW1, the second push switch SW2 adjustable liquid crystal display.
In the actual production, some LCD self output not with voltage needs outer voltage supplied.
As in the schematic diagram of second kind of embodiment of the present utility model shown in Figure 4, described LCD is the single adjustable LCD of just powering, digital regulated circuit need comprise that one can produce the voltage generation circuit of positive voltage output, the input end and the power supply of described voltage generation circuit join, the adjustable end 11 of the output terminal of voltage generation circuit and the contrast of LCD joins, and the VH pin of described digital regulation resistance U2, VCC pin join through the adjustable end 11 of contrast of first resistance R 1, second resistance R 2 and described LCD respectively; The VL pin of described digital regulation resistance U2 is put sky, its ASE pin and GND pin join as the input low side of described digital regulated circuit and the earth terminal 12 of described LCD, voltage generation circuit shown in the figure comprises that a model produces chip U3 and auxiliary circuit thereof for MC34063 voltage, cooperation can produce a positive adjustable output voltage with digital regulation resistance U2, the VF pin that the VW pin of described digital regulation resistance U2 and described voltage produce chip U3 joins, by the contrast backlight of the first push switch SW1, the second push switch SW2 adjustable liquid crystal display.
MC34063 is a voltage transitions chip, and can boost (low to high), step-down (high to low), back-pressure voltage transitions such as (just arriving negative) in different voltage transitions, only need the connection of different auxiliary circuits to realize.
In the schematic diagram of the third embodiment of the present utility model shown in Figure 5, described LCD then is the adjustable LCD of single negative voltage, digital regulated circuit need comprise that one can produce the voltage generation circuit of negative voltage output, the input end and the power supply of voltage generation circuit join, the adjustable end 11 of the output terminal of described voltage generation circuit and the contrast of described LCD joins, the VH pin of described digital regulation resistance U2 joins through the VCC pin of the 3rd resistance R 3 with digital regulation resistance U2, the VCC pin of described digital regulation resistance U2 joins as the input low side of described digital regulated circuit and the earth terminal 12 of described LCD, the ASE pin of described digital regulation resistance U2, the GND pin joins as the output terminal of described digital regulated circuit and the adjustable end 11 of contrast of described LCD; Described switch the one SW1 joins by the PU pin of the first optocoupler U4 and described digital regulation resistance U2, and described second switch SW2 joins by the PD pin of the second optocoupler U5 and described digital regulation resistance U2.Voltage generation circuit shown in the figure comprises that a model produces chip U3 and auxiliary circuit thereof for MC34063 voltage, cooperation can produce a negative adjustable output voltage with digital regulation resistance U2, the VF pin that the VW pin of described digital regulation resistance U2 and described voltage produce chip U3 joins, equally, the contrast backlight by the first push switch SW1, the second push switch SW2 adjustable liquid crystal display.
In the schematic diagram of the 4th kind of embodiment of the present utility model shown in Figure 6, described LCD is the LCD of a fixed negative voltage and an adjustable negative voltage formula, be that described LCD also has a fixed negative voltage input end 14, digital regulated circuit needs one can produce the voltage generation circuit of fixed negative voltage output, the input end and the power supply of described voltage generation circuit join, the output terminal while of voltage generation circuit and the fixed negative voltage input end 14 of described LCD, the GND pin of described digital regulation resistance U2, the VL pin, the ASE pin joins, be described digital regulation resistance U2 power supply, the VH pin of digital regulation resistance U2 joins through the VCC pin of the 3rd resistance R 3 with digital regulation resistance U2, the VCC pin of described digital regulation resistance U2 joins as the input low side of described digital regulated circuit and the earth terminal 12 of described LCD, and the VW pin of described digital regulation resistance U2 joins as the output terminal of described digital regulated circuit and the adjustable end 11 of contrast of described LCD; Described switch SW 1 is joined by the PU pin of the first optocoupler U4 and described digital regulation resistance U2, described switch SW 2 is joined by the PD pin of the second optocoupler U5 and described digital regulation resistance U2, voltage generation circuit shown in the figure comprises that a model produces chip U3 and auxiliary circuit thereof for MC34063 voltage, can produce a negative fixed voltage, produce the contrast of a negative adjustable voltage regulator solution crystal display again with digital regulation resistance U2, equally, the contrast backlight by the first push switch SW1, the second push switch SW2 adjustable liquid crystal display.
From the above mentioned, in various embodiment of the present utility model, all adopt digital regulated mode to replace original analog regulation mode, contrast to LCD is adjusted, positive or other operators that can be easily first switch SW 1, the second switch SW2 that adjusts contrast be arranged on LCD think position comparatively easily, thereby it was both accurate to operate, and are convenient again, the utility model also has advantages such as range of application is wider, is applicable to most of LCD.
Claims (9)
1. the regulating device of a LCD contrast, described LCD (1) comprises an adjustable end of contrast (11), earth terminal (12), it is characterized in that: the regulating device of described LCD contrast comprises a digital regulated circuit (2) that joins with power supply, first switch SW 1 and second switch SW2, the output terminal of described digital regulated circuit, input low side join with the adjustable end of the contrast of described LCD (11), earth terminal (12) respectively; The plus coujnt input end (21) of described digital regulated circuit, subtraction are counted into end (22) and are joined with described first switch SW 1, second switch SW2 respectively, the equal ground connection of an other end of described first switch SW 1 and second switch SW2.
2. the regulating device of LCD contrast as claimed in claim 1, it is characterized in that: it is digital regulation resistance U2 and the auxiliary circuit thereof of X9511 that described digital regulated circuit adopts model, and the PU pin of described digital regulation resistance U2, PD pin are respectively as plus coujnt input end (21), the subtraction counting input end (22) of digital regulated circuit.
3. the regulating device of LCD contrast as claimed in claim 2 is characterized in that: described LCD is the LCD that carries positive voltage output, and its positive voltage output end (13) is as the power supply of described digital regulated circuit; The VH pin of described digital regulation resistance U2, VCC pin join through the positive voltage output end of first resistance R 1, second resistance R 2 and described LCD respectively; The VW pin of described digital regulation resistance U2 joins as the output terminal of described digital regulated circuit and the adjustable end of contrast () of described LCD, and the VL pin of described digital regulation resistance U2, ASE pin, GND pin join as the input low side of described digital regulated circuit and the earth terminal (12) of described LCD.
4. the regulating device of LCD contrast as claimed in claim 2, it is characterized in that: described LCD is the single adjustable LCD of just powering, described digital regulated circuit comprises that also one can produce the voltage generation circuit of positive voltage output, the input end and the power supply of described voltage generation circuit join, the output terminal of described voltage generation circuit and the adjustable end of the contrast of described LCD (11) join, the VH pin of described digital regulation resistance U2, the VCC pin is respectively through first resistance R 1, the adjustable end of contrast (11) of second resistance R 2 and described LCD joins; The VL pin of described digital regulation resistance U2 is put sky, and its ASE pin and GND pin join as the input low side of described digital regulated circuit and the earth terminal (12) of described LCD.
5. the regulating device of LCD contrast as claimed in claim 4, it is characterized in that: described voltage generation circuit comprises that a model produces chip U3 and auxiliary circuit thereof for MC34063 voltage, and the VF pin that the VW pin of described digital regulation resistance U2 and described voltage produce chip U3 joins.
6. the regulating device of LCD contrast as claimed in claim 2, it is characterized in that: described LCD is the adjustable LCD of single negative voltage, described digital regulated circuit comprises that also one can produce the voltage generation circuit of negative voltage output, the input end and the power supply of described voltage generation circuit join, the output terminal of described voltage generation circuit and the adjustable end of the contrast of described LCD (11) join, the VH pin of described digital regulation resistance U2 joins through the VCC pin of the 3rd resistance R 3 with digital regulation resistance U2, the VCC pin of described digital regulation resistance U2 joins the ASE pin of described digital regulation resistance U2 as the input low side of described digital regulated circuit and the earth terminal (12) of described LCD, the GND pin joins as the output terminal of described digital regulated circuit and the adjustable end of contrast (11) of described LCD; Described first switch SW 1 is joined by the PU pin of the first optocoupler U4 and described digital regulation resistance U2, and described second switch SW2 joins by the PD pin of the second optocoupler U5 and described digital regulation resistance U2.
7. the regulating device of LCD contrast as claimed in claim 6, it is characterized in that: described voltage generation circuit comprises that a model produces chip U3 and auxiliary circuit thereof for MC34063 voltage, and the VF pin that the VW pin of described digital regulation resistance U2 and described voltage produce chip U3 joins.
8. the regulating device of LCD contrast as claimed in claim 2, it is characterized in that: described LCD is the LCD of a fixed negative voltage and an adjustable negative voltage formula, be that described LCD also has a fixed negative voltage input end (14), described digital regulated circuit comprises that also one can produce the voltage generation circuit of fixed negative voltage output, the input end and the power supply of described voltage generation circuit join, the output terminal while of described voltage generation circuit and the fixed negative voltage input end (14) of described LCD, the GND pin of described digital regulation resistance U2, the VL pin, the ASE pin joins, the VH pin of described digital regulation resistance U2 joins through the VCC pin of the 3rd resistance R 3 with digital regulation resistance U2, the VCC pin of described digital regulation resistance U2 joins as the input low side of described digital regulated circuit and the earth terminal (12) of described LCD, and the VW pin of described digital regulation resistance U2 joins as the output terminal of described digital regulated circuit and the adjustable end of contrast (11) of described LCD; Described first switch SW 1 is joined by the PU pin of the first optocoupler U4 and described digital regulation resistance U2, and described second switch SW2 joins by the PD pin of the second optocoupler U5 and described digital regulation resistance U2.
9. the regulating device of LCD contrast as claimed in claim 8 is characterized in that: described voltage generation circuit comprises that a model produces chip U3 and auxiliary circuit thereof for MC34063 voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03226384 CN2627612Y (en) | 2003-05-20 | 2003-05-20 | Equipment for regulating LCD contrast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03226384 CN2627612Y (en) | 2003-05-20 | 2003-05-20 | Equipment for regulating LCD contrast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2627612Y true CN2627612Y (en) | 2004-07-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03226384 Expired - Fee Related CN2627612Y (en) | 2003-05-20 | 2003-05-20 | Equipment for regulating LCD contrast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2627612Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102122495A (en) * | 2010-12-29 | 2011-07-13 | 上海申瑞电力科技股份有限公司 | Contrast regulating circuit for liquid crystal display screen |
| CN102208162A (en) * | 2010-09-30 | 2011-10-05 | 四川虹欧显示器件有限公司 | Picture quality regulating device of plasma displayer and plasma television |
| CN101673516B (en) * | 2008-09-09 | 2012-06-27 | 上海申瑞电力科技股份有限公司 | Liquid crystal screen contrast adjustment circuit for monitoring equipment |
| CN101751878B (en) * | 2008-12-10 | 2012-07-04 | 比亚迪股份有限公司 | Method, device and system for adjusting display contrast of LCD screen |
| CN107612295A (en) * | 2017-10-16 | 2018-01-19 | 淮北市平祥感应炉有限公司 | A kind of button power controller |
-
2003
- 2003-05-20 CN CN 03226384 patent/CN2627612Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101673516B (en) * | 2008-09-09 | 2012-06-27 | 上海申瑞电力科技股份有限公司 | Liquid crystal screen contrast adjustment circuit for monitoring equipment |
| CN101751878B (en) * | 2008-12-10 | 2012-07-04 | 比亚迪股份有限公司 | Method, device and system for adjusting display contrast of LCD screen |
| CN102208162A (en) * | 2010-09-30 | 2011-10-05 | 四川虹欧显示器件有限公司 | Picture quality regulating device of plasma displayer and plasma television |
| CN102208162B (en) * | 2010-09-30 | 2013-11-06 | 四川虹欧显示器件有限公司 | Picture quality regulating device of plasma displayer and plasma television |
| CN102122495A (en) * | 2010-12-29 | 2011-07-13 | 上海申瑞电力科技股份有限公司 | Contrast regulating circuit for liquid crystal display screen |
| CN102122495B (en) * | 2010-12-29 | 2014-09-03 | 上海申瑞继保电气有限公司 | Contrast regulating circuit for liquid crystal display screen |
| CN107612295A (en) * | 2017-10-16 | 2018-01-19 | 淮北市平祥感应炉有限公司 | A kind of button power controller |
| CN107612295B (en) * | 2017-10-16 | 2019-04-19 | 淮北市平祥感应炉有限公司 | A kind of button power controller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |