CN201035658Y - Tax-controlled casher with liquid crystal screen brightness automatic regulation function - Google Patents
Tax-controlled casher with liquid crystal screen brightness automatic regulation function Download PDFInfo
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- CN201035658Y CN201035658Y CNU2006201396914U CN200620139691U CN201035658Y CN 201035658 Y CN201035658 Y CN 201035658Y CN U2006201396914 U CNU2006201396914 U CN U2006201396914U CN 200620139691 U CN200620139691 U CN 200620139691U CN 201035658 Y CN201035658 Y CN 201035658Y
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- liquid crystal
- crystal display
- tax
- brightness
- cash register
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- 239000004973 liquid crystal related substance Substances 0.000 title claims description 43
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 230000003750 conditioning effect Effects 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 230000006870 function Effects 0.000 description 5
- 230000009711 regulatory function Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000006399 behavior Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The utility model discloses a fiscal cash register with LCD screen brightness automatic adjusting function, and comprises a host machine and a LCD screen. The utility model is characterized in that a luminous intensity sensor is arranged on the LCD screen or adjacent area, the host machine also comprises an intensity recognition unit which is utilized to quantize the electrical signal of the luminous intensity sensor and generate adjusting parameter according to the preset data, and an intensity adjusting unit used to decode the adjusting parameter of the adjusting unit and make intensity adjustment to the LCD display. The intensity recognition unit comprises a changeover circuit and a central control unit. An adjusting signal output interface circuit for connecting with the LCD screen is arranged on the intensity adjusting unit. The fiscal cash register of the utility model can be utilized in environment with different luminous intensity, the intensity and the contrast grade of the LCD screen can be automatically adjusted to a present state, and the best display effect is realized.
Description
Technical field
The utility model relates to tax-control cash register, specifically a kind of tax-control cash register with liquid crystal display intensity and the automatic regulatory function of contrast.
Background technology
Tax control products such as electronics tax-control cash register, The Design of Tax Controled Device have the automatic tax calculation function, and can prevent the generation of the behavior of evading the tax, and are subjected to the favor of state tax authority day by day, and are progressively promoted the use of.General liquid crystal display all has the function of intensity and contrast adjustment, and associated adjustment realizes by regulating voltage backlight mostly.Usually come preset voltage by divider resistance, therefore under the situation of different visual light intensity, just can not reach best display effect.Because tax-control cash register need use under different photoenvironments, and existing tax-control cash register product can not be adjusted the intensity and the contrast of liquid crystal display automatically under the environment that illumination changes, read information thereby influence the user from LCDs.
Summary of the invention
To be solved in the utility model is the above-mentioned defective that existing tax-control cash register exists, and aims to provide a kind of tax-control cash register with the automatic regulatory function of LCD screen intensity.
The utility model also will provide a kind of tax-control cash register that has the automatic regulatory function of LCD screen contrast concurrently.
The technical scheme that addresses the above problem employing is: have the tax-control cash register of the automatic regulatory function of liquid crystal display intensity, comprise main frame and liquid crystal display, it is characterized in that on the described liquid crystal display or its near zone is provided with light intensity sensor, also be provided with on the described main frame:
Be used for the electric signal of described light intensity sensor is quantized, and generate the intensity recognition unit of regulating parameter according to initialize data;
Be used to understand the adjusting parameter of described regulon, and liquid crystal display carried out the intensity adjustments unit of intensity adjustments.
According to the utility model, described light intensity sensor is a plurality of, be distributed on described liquid crystal display around; Described light intensity sensor is photodiode, phototriode, the photoresistance any or multiple combination wherein of plain edition or infrared type.
According to the utility model, described intensity recognition unit comprises:
Be used for the electric signal of described light intensity sensor is converted into digital signal conversion circuit;
Be used for the central control unit that numeral is adjusted deviator output is analyzed and produced to electric signal after the conversion and initialize data.
According to the utility model, described change-over circuit is wherein any of A/D converter, V/F converter or voltage comparator.
According to the utility model, described central control unit is wherein any of CPU, MPU or single-chip microcomputer.
According to the utility model, described intensity recognition unit can also be the single-chip microcomputer of a band A/D converter.
According to the utility model, described intensity adjustments unit is understood the adjusting parameter that the intensity recognition unit generates by separating reading circuit, and should to regulate parameter adjustment according to the classification of liquid crystal display be corresponding conditioning signal, and then increase or reduce the intensity that the voltage backlight of liquid crystal display is regulated liquid crystal display; The perhaps intensity of regulating liquid crystal display of the dutycycle by adjusting the PWM conditioning signal.
According to the utility model, described intensity adjustments unit also is provided with the conditioning signal output interface circuit that is connected usefulness with described liquid crystal display.
According to the utility model, described liquid crystal display is wherein any of dot matrix type, gray scale type, STN, TFT.
According to the utility model, described intensity recognition unit generates intensity adjustments parameter and contrast adjustment parameter simultaneously; Described intensity adjustments unit is regulated the intensity and the contrast of liquid crystal display simultaneously.
According to the utility model, described tax-control cash register with the automatic regulatory function of liquid crystal display intensity is characterized in that described intensity recognition unit and intensity adjustments unit are integrated in tax-control cash register inside.
Tax-control cash register of the present utility model by the light intensity of light intensity sensor induction field of employment, and converts ambient light signal to and simulates electric signal and export to the intensity recognition unit; The intensity recognition unit will receive simulates electrical signal conversion and becomes to touch digital electric signal, and this digital electric signal is compared and treated the back and generates and regulate parameter with presetting; The adjusting parameter adjustment that the intensity adjustments unit will receive meets the conditioning signal of liquid crystal display intensity or contrast for its correspondence, as voltage signal, current signal or pulse width signal etc., liquid crystal display intensity or contrast is regulated.Thereby the utility model uses in the environment of different light intensity degree, can automatically the intensity and the contrast of liquid crystal display be adjusted to certain state that presets, thereby reaches best display effect.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the structured flowchart of the utility model tax-control cash register.
Fig. 2 is the circuit block diagram that the utility model is regulated liquid crystal display intensity and contrast part-structure.
Fig. 3 is that the utility model brightness recognition unit is made of voltage comparator circuit and central control unit, and described brightness adjusting unit is by the circuit block diagram of separating the embodiment that reading circuit and interface circuit constitute.
The circuit block diagram of Fig. 4 embodiment that to be the utility model brightness recognition unit be made of the central control unit of band A/D translation function.
Embodiment
With reference to Fig. 1,2, the utility model tax-control cash register, mainboard is provided with CPU, tax-controlling memory, invoice memory, clock, hummer, printer, subscriber card interface, tax-controlling card interface, VFD display board, LCDs, control lock, keyboard, RS232 serial ports and brightness recognition unit, brightness adjusting unit, also is provided with several light intensity sensors on described LCDs.Described brightness recognition unit input end links to each other with the input end of light intensity sensor, and its output terminal links to each other with the input end of brightness adjusting unit.The output terminal of described brightness adjusting unit is connected to LCDs.
With reference to Fig. 3, described brightness recognition unit is made of voltage comparator circuit and central control unit, and described brightness adjusting unit is by separating reading circuit and interface circuit constitutes.
With reference to Fig. 4, another embodiment of the present utility model, described brightness recognition unit is made of the central control unit of band A/D translation function.
What should be understood that is: the foregoing description is just to explanation of the present utility model, rather than to restriction of the present utility model, any innovation and creation that do not exceed in the utility model connotation scope all fall within the protection domain of the present utility model.
Claims (10)
1. the tax-control cash register that has liquid crystal display automatic brightness adjustment function comprises main frame and liquid crystal display, it is characterized in that on the described liquid crystal display or its near zone is provided with light intensity sensor, also is provided with on the described main frame:
Be used for the electric signal of described light intensity sensor is quantized, and generate the brightness recognition unit of regulating parameter according to initialize data;
Be used to understand the adjusting parameter of described regulon, and liquid crystal display carried out the brightness adjusting unit of brightness regulation.
2. the tax-control cash register with liquid crystal display automatic brightness adjustment function as claimed in claim 1 is characterized in that described light intensity sensor is a plurality of, be distributed on described liquid crystal display around; Described light intensity sensor is photodiode, phototriode, the photoresistance any or multiple combination wherein of plain edition or infrared type.
3. the tax-control cash register with liquid crystal display automatic brightness adjustment function as claimed in claim 1 is characterized in that described brightness recognition unit comprises:
Be used for the electric signal of described light intensity sensor is converted into digital signal conversion circuit;
Be used for the central control unit that numeral is adjusted deviator output is analyzed and produced to electric signal after the conversion and initialize data.
4. the tax-control cash register with liquid crystal display automatic brightness adjustment function as claimed in claim 3 is characterized in that described change-over circuit is wherein any of A/D converter, V/F converter or voltage comparator.
5. the tax-control cash register with liquid crystal display automatic brightness adjustment function as claimed in claim 3 is characterized in that described central control unit is wherein any of CPU, MPU or single-chip microcomputer.
6. the tax-control cash register with liquid crystal display automatic brightness adjustment function as claimed in claim 1, it is characterized in that described brightness adjusting unit understands the adjusting parameter that the brightness recognition unit generates by separating reading circuit, and should to regulate parameter adjustment according to the classification of liquid crystal display be corresponding conditioning signal, and then increase or the voltage backlight that reduces liquid crystal display is regulated the brightness of liquid crystal display; The perhaps brightness of regulating liquid crystal display of the dutycycle by adjusting the PWM conditioning signal.
7. the tax-control cash register with liquid crystal display automatic brightness adjustment function as claimed in claim 6 is characterized in that described brightness adjusting unit also is provided with the conditioning signal output interface circuit that is connected usefulness with described liquid crystal display.
8. the tax-control cash register with liquid crystal display automatic brightness adjustment function as claimed in claim 6 is characterized in that described liquid crystal display is wherein any of dot matrix type, gray scale type, STN, TFT.
9. the tax-control cash register with liquid crystal display automatic brightness adjustment function as claimed in claim 1 is characterized in that described brightness recognition unit generates brightness regulation parameter and contrast adjustment parameter simultaneously; Described brightness adjusting unit is regulated the brightness and contrast of liquid crystal display simultaneously.
10. as any one described tax-control cash register of claim 1-9, it is characterized in that described brightness recognition unit and brightness adjusting unit are integrated in tax-control cash register inside with liquid crystal display automatic brightness adjustment function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201396914U CN201035658Y (en) | 2006-11-03 | 2006-11-03 | Tax-controlled casher with liquid crystal screen brightness automatic regulation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201396914U CN201035658Y (en) | 2006-11-03 | 2006-11-03 | Tax-controlled casher with liquid crystal screen brightness automatic regulation function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201035658Y true CN201035658Y (en) | 2008-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201396914U Expired - Fee Related CN201035658Y (en) | 2006-11-03 | 2006-11-03 | Tax-controlled casher with liquid crystal screen brightness automatic regulation function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201035658Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104078012A (en) * | 2014-07-25 | 2014-10-01 | 上海工程技术大学 | Brightness adjustment circuit based on Raspberry Pi |
| CN104715383A (en) * | 2015-03-30 | 2015-06-17 | 无锡市崇安区科技创业服务中心 | Fitting room system based on RFID |
| CN110895916A (en) * | 2018-09-20 | 2020-03-20 | 研祥智能科技股份有限公司 | System for adaptively setting output resolution of LVDS (Low Voltage differential Signaling) interface |
-
2006
- 2006-11-03 CN CNU2006201396914U patent/CN201035658Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104078012A (en) * | 2014-07-25 | 2014-10-01 | 上海工程技术大学 | Brightness adjustment circuit based on Raspberry Pi |
| CN104715383A (en) * | 2015-03-30 | 2015-06-17 | 无锡市崇安区科技创业服务中心 | Fitting room system based on RFID |
| CN110895916A (en) * | 2018-09-20 | 2020-03-20 | 研祥智能科技股份有限公司 | System for adaptively setting output resolution of LVDS (Low Voltage differential Signaling) interface |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG HAIKANG TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ZHEJIANG HAIKANG INFORMATION TECHNOLOGY CO., LTD. Effective date: 20090612 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090612 Address after: 795, bin Kang Road, Binjiang District, Zhejiang, Hangzhou: 310053 Patentee after: Zhejiang Kaikang Technology Co., Ltd. Address before: 795, bin Kang Road, Binjiang District, Zhejiang, Hangzhou: 310053 Patentee before: Zhejiang Haikang Information Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080312 Termination date: 20151103 |
|
| EXPY | Termination of patent right or utility model |