CN1661663A - Brightness and contrast adjustment device and method - Google Patents
Brightness and contrast adjustment device and method Download PDFInfo
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- CN1661663A CN1661663A CN 200410015500 CN200410015500A CN1661663A CN 1661663 A CN1661663 A CN 1661663A CN 200410015500 CN200410015500 CN 200410015500 CN 200410015500 A CN200410015500 A CN 200410015500A CN 1661663 A CN1661663 A CN 1661663A
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Abstract
一种亮度及对比度调整装置及方法，该亮度及对比度调整装置包括：一按键，一单片机、一数模转换器、一信号放大器、一背光控制器、一显示屏幕及一电源。该亮度及对比度调整方法包括如下步骤：接受用户输入一综合亮度；获取该综合亮度并显示于显示屏幕上；从该综合亮度中计算一亮度及一对比度的数值；将该亮度及对比度的数值转化为一亮度及对比度的电压脉冲信号；调整该亮度及对比度的电压脉冲信号；以及显示已调整的亮度及对比度的影像效果。实施本发明，用户仅输入一综合亮度就可达到同时调整亮度及对比度的影像显示效果。
A brightness and contrast adjustment device and method, the brightness and contrast adjustment device includes: a button, a single-chip microcomputer, a digital-to-analog converter, a signal amplifier, a backlight controller, a display screen and a power supply. The brightness and contrast adjustment method includes the following steps: accepting user input of a comprehensive brightness; obtaining the comprehensive brightness and displaying it on the display screen; calculating a brightness and a contrast value from the comprehensive brightness; converting the brightness and contrast values It is a voltage pulse signal of brightness and contrast; adjusts the voltage pulse signal of brightness and contrast; and displays the image effect of adjusted brightness and contrast. By implementing the present invention, the user only needs to input a comprehensive brightness to achieve the image display effect of simultaneously adjusting brightness and contrast.
Description
[technical field]
The present invention relates to a kind of adjustment technology that is applied to brightness and contrast in the display device, particularly about a kind of device and method that is applied to adjust in the single operation mode in the display device brightness and contrast.
[prior art]
Display is as important image output device, just progressively to higher technical development.Present Display Types mainly contains CRT (Cathode-ray Tube) display, LCD (LCD) and plasma scope (PDP) etc.The Presentation Function of display is mainly finished by a light source backlight, the display brightness (Brightness) of this display of brightness decision of this light source; Contrast (Contrast) is meant the measurement of comparison degree of two kinds of color different levels of B﹠W.Theoretically, the brightness of display is high more good more, and contrast reaches at 120: 1 o'clock just can show lively, abundant colors of image, so the adjustment function of the brightness of display and contrast has influence on the effect that image shows to a great extent.General display device is to adopt brightness and the staggered mode of regulating of contrast now, is to finish by the single operation knob yet some products are also arranged.For example the brightness of TDS-7xxD series scope and the adjusting of contrast are to control by a knob, it need be regulated by the brightness on the selection master menu and the regulatory function of contrast, in fact it be equivalent to use two knobs to regulate brightness and contrast, an one knob is used to regulate brightness, one is used to regulate contrast, does not use single mode of operation to regulate the function of brightness and contrast simultaneously and really reach.
Once be exposed in the U.S. the 6th of 03 month 29 days calendar year 2001 bulletin about the adjustment technology of the brightness of display device and contrast, 239, No. 782 patents, its patent name are " using single knob controlling brightness (Single Knob IntensityControl For Use In Digital Test and Measurement Equipment) in digital test and tolerance equipment ".This patent disclosed a kind of be applied to test and tolerance equipment in adjust the device and method of brightness and contrast simultaneously by single knob, this method is used a series of curves that a plurality of pixel values that are used to describe brightness form and is shown control byte, and its mode of operation with single knob controlling brightness is by selecting a particular curve to finish the adjustment function of brightness and contrast.Yet this invention weak point is its pixel number that is used for describing brightness and contrast curves and need be stored in internal memory in advance, and need to compare with a plurality of pixel values of curve from the brilliance control numerical value that the single knob of user reads, thereby increased hardware burden, and implemented comparatively complicated.
For overcoming the deficiency of above-mentioned prior art, a kind of brightness and contrast adjusting gear and method must be provided, it only increases the numerical value that a comprehensive brightness obtains brightness and contrast simultaneously in display device, the user just can adjust brightness and the contrast that image shows easily simultaneously in the single operation mode.
[summary of the invention]
At the deficiency that prior art exists, fundamental purpose of the present invention is to provide a kind of brightness and contrast adjusting gear and method, and it can be applicable to adjust brightness and the contrast that image shows in the single operation mode in the display device.
Another object of the present invention is to provide a kind of brightness and contrast adjusting gear and method, when the user imports a comprehensive brightness and is 0% to 50%, the scope of then adjusting brightness be 0% to 20% and the scope of adjusting contrast be 0% to 80%; When the user imports a comprehensive brightness and is 50% to 100%, the scope of then adjusting brightness be 20% to 100% and the scope of adjusting contrast be 80% to 100%.
For reaching the foregoing invention purpose, the invention provides a kind of brightness and contrast adjusting gear.This brightness and contrast adjusting gear comprise: a button is used to accept the numerical value that the user imports a comprehensive brightness (Luminance), described comprehensive brightness is meant the required final brightness that shows of user on the screen of display device, this button is to be made of left button and right button; One single-chip microcomputer is used to obtain the numerical value from the comprehensive brightness of button input, and calculates the numerical value of a brightness and a contrast from this comprehensive brightness; The numerical value that one digital to analog converter is used for the brightness that will be calculated by described single-chip microcomputer and contrast converts the voltage pulse signal of brightness and contrast to; One signal amplifier is used for the amplitude width of the voltage pulse signal of brightness of changing out from described digital to analog converter and contrast is carried out the convergent-divergent adjustment, and with Low Voltage Differential Signal (Low Voltage Differential Signaling, load mode output brightness LVDS) and the voltage pulse signal of contrast; One backlight controller is used to receive the Low Voltage Differential Signal of this brightness and contrast, and controls the image demonstration of the Low Voltage Differential Signal of this brightness and contrast; One display screen is used to show the image display effect of adjusted brightness and contrast; And one power supply be used for providing needed electric current and voltage to this brightness and contrast adjusting gear.Wherein, described single-chip microcomputer comprises: a comprehensive luminance acquisition module is used to obtain the numerical value from the comprehensive brightness of button input; One brightness calculation module is used for calculating from the numerical value of this comprehensive brightness the numerical value of a brightness; And one the contrast computing module be used for calculating a pair of numerical value than degree from the numerical value of this comprehensive brightness;
The present invention also provides a kind of brightness and contrast method of adjustment.This brightness and contrast method of adjustment comprise: accept the user and import a comprehensive brightness; Obtain described comprehensive brightness and be presented on the display screen; From described comprehensive brightness, calculate the numerical value of a brightness and a contrast; The numerical value of described brightness and contrast is converted into the voltage pulse signal of brightness and contrast; Adjust the voltage pulse signal of described brightness and contrast; And the image display effect that shows adjusted brightness and contrast.
By implementing the present invention, the user only imports once comprehensive brightness in the single operation mode and can reach the image display effect of adjusting brightness and contrast simultaneously in display device.
[description of drawings]
Fig. 1 is the block hardware diagram of brightness of the present invention and contrast adjusting gear.
Fig. 2 is the function broken line graph that calculates brightness and contrast from comprehensive brightness of brightness of the present invention and contrast method of adjustment.
Fig. 3 is the process flow diagram of brightness of the present invention and contrast method of adjustment.
[embodiment]
As shown in Figure 1, be the block hardware diagram of brightness of the present invention and contrast adjusting gear.This brightness and contrast adjusting gear comprise a button (Key) 1, a single-chip microcomputer (MICON) 2, a digital to analog converter (A/D Inverter) 3, one signal amplifier (Signal Scalar) 4, one backlight controller (Back Light Controller) 5, one display screen (Display Screen) 6 and one power supply (Power) 7.Wherein, button 1 is used to accept the numerical value that the user imports a comprehensive brightness, this button 1 is to be made of left button 11 and right button 12, and left button 11 is used to accept the numerical value that the user imports the comprehensive brightness of a minimizing, and right button 12 is used to accept the numerical value that the user imports the comprehensive brightness of an increase.Single-chip microcomputer 2 is used to obtain the numerical value from the comprehensive brightness of button 1 input, and calculates the numerical value of a brightness and a contrast from this comprehensive brightness.This single-chip microcomputer 2 comprises a comprehensive luminance acquisition module 21, a brightness calculation module 22 and a contrast computing module 23.This comprehensive luminance acquisition module 21 is used to obtain the numerical value from a comprehensive brightness of button 1 input; This brightness calculation module 22 is used for calculating from this comprehensive brightness the numerical value of a brightness; And this contrast computing module is used for calculating a pair of numerical value than degree from this comprehensive brightness.The numerical value that digital to analog converter 3 is used for the brightness that will be calculated by single-chip microcomputer 2 and contrast converts the voltage pulse signal of brightness and contrast to.Signal amplifier 4 comprises a pulse-length modulation module (Pulse Width-adjustModule, PWM) 41, it is used for the amplitude width of the voltage pulse signal of brightness of changing out from digital to analog converter 3 and contrast is carried out the convergent-divergent adjustment, and exports the voltage pulse signal of brightness and contrast to backlight controller 5 with the load mode of Low Voltage Differential Signal (LVDS).Backlight controller 5 is used to receive the Low Voltage Differential Signal of brightness and contrast, and controls the image demonstration of the Low Voltage Differential Signal of this brightness and contrast.Display screen 6 is used to show the image display effect of adjusted brightness and contrast.Power supply 7 is used for providing required electric current and voltage to this brightness and contrast adjusting gear.
As shown in Figure 2, be the function broken line graph that from comprehensive brightness, calculates brightness and contrast of brightness of the present invention and contrast method of adjustment.Brightness broken line 201 representatives of this function broken line graph obtain the funtcional relationship of brightness from comprehensive brightness, its horizontal ordinate is represented the numerical value of comprehensive brightness, and its ordinate is represented the numerical value of brightness.After the comprehensive luminance acquisition module 21 of single-chip microcomputer 2 was obtained a comprehensive brightness, brightness calculation module 22 calculated the numerical value of brightness from this comprehensive brightness.Its method of calculating brightness from comprehensive brightness is: when this comprehensive brightness smaller or equal to 50% the time, then brightness=(comprehensive brightness * 2.sup.1)/5; When this comprehensive brightness greater than 50% the time, brightness=20+ ((comprehensive brightness-50) * 2.sup.3)/5 then.Wherein, " .sup. " is the power operation operational character.Contrast broken line 202 representatives of this function broken line graph obtain the funtcional relationship of contrast from comprehensive brightness, its horizontal ordinate is represented the numerical value of comprehensive brightness, and its ordinate is represented the numerical value of contrast.After the comprehensive luminance acquisition module 21 of single-chip microcomputer 2 was obtained comprehensive brightness, contrast computing module 23 calculated the numerical value of contrast from comprehensive brightness.It from the comprehensive brightness method of calculating contrast of falling into a trap is: when this comprehensive brightness smaller or equal to 50% the time, then contrast=(comprehensive brightness * 2.sup.3)/5; When this comprehensive brightness greater than 50% the time, contrast=80+ ((comprehensive brightness-50) * 2.sup.1)/5 then.
From the broken line 201 of Fig. 2 and broken line 202 as can be known: when the numerical value that obtains comprehensive brightness from comprehensive luminance acquisition module 21 is 0% to 50%, then the brightness that calculates by brightness calculation module 22 be 0% to 20% and the contrast that calculates by contrast computing module 23 be 0% to 80%; When the numerical value that obtains comprehensive brightness from comprehensive luminance acquisition module 21 is 50% to 100%, then the brightness that calculates by brightness calculation module 22 be 20% to 100% and the contrast that calculates by contrast computing module 23 be 80% to 100%.Brightness and contrast are calculated in realization from comprehensive brightness virtual code (Pseudo-codes) can be expressed as follows:
If(Luminance＜50){Brightness＝(Luminance＜＜1)/5；Contract＝(Luminance＜＜3)/5；}If(Luminance＞50){Brightness＝20+((Luminance-50)＜＜3)/5；Contract＝80+((Luminance-50)＜＜1)/5；}
Wherein parameter " Luminance " is represented comprehensive brightness, and " Brightness " represents brightness, and " Contract " represents contrast; Operational character "＜＜" represent an operand is done shift right operation n position, be about to an operand and increase 2.sup.n doubly.For example to obtain the numerical value of comprehensive brightness be 25 to the comprehensive luminance acquisition module 21 of single-chip microcomputer 2, and then brightness calculation module 22 is 10 by the numerical value that virtual code " Brightness=(Luminance＜＜1)/5 " can calculate brightness; And contrast computing module 23 is 40 by the numerical value that virtual code " Contract=(Luminance＜＜3)/5 " calculates contrast.In sum, its user is from the numerical value of the comprehensive brightness of button 1 input, and the brightness that calculates by single-chip microcomputer 2 and the numerical value of contrast can be represented by employing table (1):
Comprehensive brightness 06 12 18 25 31 37 43 50 57 65 72 80 85 90 95 100 brightness 0257 10 12 15 17 20 32 44 56 68 76 84 92 100 contrasts 0 10 20 30 40 50 60 70 80 83 86 89 90 92 94 98 100 of table (1)
As shown in Figure 3, be the process flow diagram of brightness of the present invention and contrast method of adjustment.The user realizes by left button 11 or numerical value that reduces or increase comprehensive brightness of selection right button 12 inputs of selection key 1 according to needed image display effect.Judge that the user selects left button 11 or right button 12 (step S1).If the user selects left button 11, then the comprehensive luminance acquisition module 21 of single-chip microcomputer 2 is obtained the user and is imported a numerical value that reduces comprehensive brightness, and is shown in (step S2) on the display screen; If the user selects right button 12, then the comprehensive luminance acquisition module 21 of single-chip microcomputer 2 is obtained the user and is imported a numerical value that increases comprehensive brightness, and is shown in (step S3) on the display screen.The brightness calculation module 22 of single-chip microcomputer 2 goes out the numerical value of corresponding brightness according to the numerical evaluation of this comprehensive brightness, and contrast computing module 23 goes out the numerical value (step S4) of corresponding contrast according to the numerical evaluation of this comprehensive brightness.Digital to analog converter 3 changes into voltage pulse signal (step S5) with the brightness that calculates and the numerical value of contrast.The pulse-length modulation module 41 of signal amplifier 4 is carried out the convergent-divergent adjustment with the amplitude width of the voltage pulse signal of this brightness and contrast, and with the load mode output brightness of Low Voltage Differential Signal (LVDS) and the voltage pulse signal (step S6) of contrast.The Low Voltage Differential Signal of brightness and contrast is accepted and controlled to backlight controller 5, and then the brightness that demonstration is adjusted on display screen 6 and the effect (step S7) of contrast, reaches brightness and contrast on the required display screen of user.
Claims (9)
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100155009A CN100405455C (en) | 2004-02-23 | 2004-02-23 | Brightness and contrast adjustment device and method |
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| CNB2004100155009A CN100405455C (en) | 2004-02-23 | 2004-02-23 | Brightness and contrast adjustment device and method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393727B (en) * | 2007-09-21 | 2011-07-20 | 北京京东方光电科技有限公司 | Highly dynamic contrast processing apparatus and method for LCD device |
| US8629829B2 (en) | 2007-04-24 | 2014-01-14 | Beijing Boe Optoelectronics Technology Co., Ltd. | Processing device and processing method for high dynamic contrast of liquid crystal display device |
| CN105049614A (en) * | 2005-06-09 | 2015-11-11 | 三星电子株式会社 | Portable terminal capable of controlling backlight and corresponding method |
| CN105451406A (en) * | 2014-08-13 | 2016-03-30 | 上海华建电力设备股份有限公司 | Illuminance transmitter circuit |
| CN106713658A (en) * | 2017-01-20 | 2017-05-24 | 北京小米移动软件有限公司 | Light source adjusting method and apparatus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4982287A (en) * | 1989-11-01 | 1991-01-01 | Rca Licensing Corporation | Control of brightness level adapted to control of contrast |
| US6239782B1 (en) * | 1999-01-19 | 2001-05-29 | Tektronix, Inc. | Single knob intensity control for use in digital test and measurement equipment |
| JP3649043B2 (en) * | 1999-06-07 | 2005-05-18 | セイコーエプソン株式会社 | Image display apparatus and method, and image processing apparatus and method |
| JP3927995B2 (en) * | 2001-12-27 | 2007-06-13 | ソニー株式会社 | Image display control apparatus, image display control method, and imaging apparatus |
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2004
- 2004-02-23 CN CNB2004100155009A patent/CN100405455C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105049614A (en) * | 2005-06-09 | 2015-11-11 | 三星电子株式会社 | Portable terminal capable of controlling backlight and corresponding method |
| US10186233B2 (en) | 2005-06-09 | 2019-01-22 | Samsung Electronics Co., Ltd | Portable terminal capable of controlling display brightness and method for controlling display brightness thereof |
| CN105049614B (en) * | 2005-06-09 | 2021-02-26 | 三星电子株式会社 | Portable terminal capable of controlling backlight and method for controlling backlight thereof |
| US10978021B2 (en) | 2005-06-09 | 2021-04-13 | Samsung Electronics Co., Ltd | Portable terminal capable of controlling display brightness and method for controlling display brightness thereof |
| US8629829B2 (en) | 2007-04-24 | 2014-01-14 | Beijing Boe Optoelectronics Technology Co., Ltd. | Processing device and processing method for high dynamic contrast of liquid crystal display device |
| CN101393727B (en) * | 2007-09-21 | 2011-07-20 | 北京京东方光电科技有限公司 | Highly dynamic contrast processing apparatus and method for LCD device |
| US8654060B2 (en) | 2007-09-21 | 2014-02-18 | Beijing Boe Optoelectronics Technology Co., Ltd. | Processing device and processing method of high dynamic contrast for liquid crystal display apparatus |
| CN105451406A (en) * | 2014-08-13 | 2016-03-30 | 上海华建电力设备股份有限公司 | Illuminance transmitter circuit |
| CN106713658A (en) * | 2017-01-20 | 2017-05-24 | 北京小米移动软件有限公司 | Light source adjusting method and apparatus |
| CN106713658B (en) * | 2017-01-20 | 2019-10-11 | 北京小米移动软件有限公司 | Light source adjustment method and device |
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| CN100405455C (en) | 2008-07-23 |
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