CN102903347B - Method and system for effectively solving problem of unclear display of liquid crystal display screen under sunshine - Google Patents
Method and system for effectively solving problem of unclear display of liquid crystal display screen under sunshine Download PDFInfo
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Abstract
The invention discloses a system for effectively solving the problem of unclear display of a liquid crystal display screen under the sunshine. The system comprises a photosensitive sensor, a central processor and a liquid crystal display module which are connected in sequence, wherein the photosensitive sensor is used for recognizing the light intensity of the external environment; the central processor is used for analyzing and processing the light brightness data of the environment and data to be displayed; the liquid crystal display module is used for finishing image display. A method disclosed by the invention comprises the following steps of: utilizing the photosensitive sensor to recognize the light intensity of the external environment accurately, recognizing the contrast of the current original image by the processor, processing the display data of the original image according to the light intensity of the external environment, and changing the gray value of the original image so as to increase the contrast and the definition of the original image. The invention has the advantages that the problem of unclear display of the liquid crystal display screen under the sunshine is solved by a data processing algorithm, serious distortion of the image can not be caused, the backlight brightness is adjusted by combining the environmental light and the image data, the power is saved compared with the mode of singly combining the environmental light to adjust the backlight brightness, and the purpose of furthest saving power under the premise of meeting the visual condition can be realized.
Description
Technical field
Unsharp method and system are shown under the present invention relates to a kind of effectively solution LCDs sunlight.
Background technology
At present, the LCDs of traditional mobile hand-held equipment is mainly divided into liquid crystal display and the large class of OLED two, because its display module self maximum luminousing brightness is limited, the demand of outdoor browse displays content under generally can not meeting user's high light, in order to can screen display content be seen clearly, the method generally taked sacrifices power consumption to improve screen intensity, and the consequence that the increase of power consumption brings is exactly the shortening of service time.
Publication number is the patent of CN102201217A is a kind of method eliminating liquid crystal display ghost and flicker, the common electric voltage of the method adjustable liquid crystal display display screen is to the intermediate value in video voltage value interval, the video voltage that drive unit exports on each pixel alternately changes around common electric voltage value, and described alternately change refers to that the video voltage mean value exported in continuous print two two field picture equals common electric voltage value.This method eliminates that liquid crystal display is aging, the problem of image residue and flicker, the display of TFT-LCD can be made to fix on black and white lattice field after one to two hours, there is not afterimage and film flicker when being switched to other signal fields again, and can not image to liquid crystal deflecting element scope.But documents 1 is only the problem solving liquid crystal display ghost and flicker.
Publication number is that the patent of CN1375732 relates to a kind of liquid crystal display method with backlight, backlight is close to the below being arranged on LCDs, the liquid crystal driver module being cured to liquid crystal chip controls com port and the existing pattern displaying of SEG cause for gossip of liquid crystal, the driver module of backlight is driven by stabilized voltage supply or constant current, the present invention adopts LCDs and the white light-emitting diode backlight array mode of transparent blueness, makes the pattern of display screen bright clear.But documents 2 is only solve the problem improving liquid crystal display sharpness under ordinary light source.
So above-mentioned documents and prior art all do not solve LCDs show unsharp technical matters in the sun.
Summary of the invention
The object of the present invention is to provide a kind of can overcome effective solution LCDs sunlight of above-mentioned technical matters under show unsharp method and system.
Showing unsharp method under a kind of effective solution LCDs sunlight of the present invention is the light intensity utilizing light sensor accurately to identify external environment condition, and send environment bright degrees of data to processor, the contrast of the current original image to be shown of processor identification, and the display data of original image are processed according to the light intensity of described external environment condition, the gray-scale value of change original image is to improve contrast and the sharpness of original image.
One of the present invention shows unsharp method and specifically comprises the following steps under effectively solving LCDs sunlight:
1. light sensor environment-identification light intensity, and the environmental light intensity degrees of data gathered is transmitted to central processing unit;
2. the ambient brightness data that light sensor sends analyzed by central processing unit, judge the light intensity of the surround lighting of current residing environment;
3. current data to be displayed gray-scale distribution analyzed by central processing unit, determines the maximum setting range of GTG;
4. and then to data to be displayed carry out data processing, and determine backlight setting range;
5. the data to be displayed after transmission processing to LCD MODULE (LCM) completes image display.
Show under a kind of effective solution LCDs sunlight of the present invention light sensor that unsharp system comprises the light intensity for identifying external environment condition connected successively, send for analyzing and processing light sensor environment bright degrees of data central processing unit, for completing the LCD MODULE of image display.
The present invention effectively utilizes the existing light sensor resource of mobile hand-held equipment can respond to external environment light power and identify the scenes such as dark surrounds at night, indoor general brightness environment, outdoor strong light environment, under solving sunlight by data processing algorithm, LCDs shows unsharp problem and effectively improves LCDs identifiability in the sun, and can not cause image serious distortion.Automatically switch normal displaying mode under non-strong light environment, need not take cpu resource for a long time.Combining environmental light and view data adjust backlight illumination, adjust backlight illumination want power saving than single combining environmental light, can realize meeting power saving object to greatest extent under visual condition.
Accompanying drawing explanation
Fig. 1 is the structural representation showing unsharp system under a kind of effective solution LCDs sunlight of the present invention;
Fig. 2 is the pixel brightness value of the original image of the method for the invention and the graph of relation of image pixel intensity value outputting to LCDs.
Embodiment
Describe the present invention below in conjunction with drawings and Examples.As shown in Figure 1, the light sensor that unsharp system comprises the light intensity for identifying external environment condition connected successively is shown under a kind of effective solution LCDs sunlight of the present invention
The central processing unit 2 of the environment bright degrees of data 1, sent for analyzing and processing light sensor, for completing the LCD MODULE 3 of image display.
One of the present invention shows unsharp method and specifically comprises the following steps under effectively solving LCDs sunlight:
1. light sensor 1 environment-identification light intensity, and the environment bright degrees of data gathered is transmitted to central processing unit 2.
2. the environment bright degrees of data that light sensor 1 sends analyzed by central processing unit 2, judges the light intensity of the surround lighting of current residing environment.
3. the environment bright degrees of data gray-scale distribution of current system analyzed by central processing unit 2, determines the maximum setting range of GTG.
4. and then to data to be displayed carry out data processing, and determine backlight setting range.
5. the data to be displayed after transmission processing to LCD MODULE 3 completes image display.
In above-mentioned step 4, because liquid-crystalline glasses and touch screen glass have certain reflectivity, therefore under comparatively strong sunlight environment, even if luminance factor is lower, the light luminance after reflection still has light (light after the liquid crystal display backlight permeate crystal glass) brightness that may emit with liquid crystal display itself suitable.When the image that liquid crystal display GTG is lower, the light that LCD screen emits is just likely more weak than the light of reflection, and the low image section naked eyes of GTG will be caused this time to see.
Therefore, in the sun by the color data of amendment original image, the pixel of low GTG is carried out larger proportion and highlights, the pixel of high gray is carried out highlighting compared with small scale, thus increase the visual effect of picture in its entirety under Yanguan Pass, and don't image can be made to produce serious distortion.
The specific implementation step of described step 4 is:
1, the environmental light brightness threshold values Lth of this function is opened in setting, the time T value of timing ambient light;
2, analyze the photosensitive ambient light data recorded, when environmental light brightness is less than threshold values Lth, directly raw image data is outputted to display screen; When environmental light brightness is greater than threshold values Lth, environmentally luminance brightness scope, determines the grade L value that brightness is strengthened;
3, carry out brightness (or lightness) according to each pixel RGB color value of original image to calculate, calculate the brightness B value of its correspondence;
4, the L value drawn according to above-mentioned two steps and B value, what calculate this pixel according to certain algorithm highlights coefficient A value, wherein, A value should be greater than 1, and B value is larger, and A value should be less, such vast scale that could realize improves low gray-scale intensity, and comparatively small scale improves high gray brightness; L value is larger, and A value should be larger;
5, according to the coefficient A value calculated, calculating conversion is carried out to the RGB color value of each pixel of original image, as: the pixel R color value after conversion=A* original pixels R color value; The pixel brightness value after conversion is made to be more than or equal to original pixel brightness value;
6, analyze the gray-scale distribution of a whole frame image data, in conjunction with the grade L value that brightness is strengthened, suitably strengthen the brightness of backlight.
The pixel brightness value of the original image of the method for the invention with output to LCDs image pixel intensity value relation curve as shown in Figure 2; In figure, a is original image pixel brightness value under strong light environment and the pixel intensity corresponding relation curve outputting to display screen; B is original image pixel brightness value under low light environment and the pixel intensity corresponding relation curve outputting to display screen.
The present invention non-linearly changes the contrast of image by software algorithm, by analyzing the brightness of the grey exponent part changing image and being changed the brightness of pixel by the color value changing rgb pixel, greatly strengthens image visual effect in the sun.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in scope disclosed by the invention; the change that can expect easily or replacement, all should be encompassed in the protection domain of the claims in the present invention.
Claims (1)
1. show a unsharp method under effectively solving LCDs sunlight, it is characterized in that, utilize light sensor
The light intensity of accurate identification external environment condition, the contrast of current original image is identified by CPU, and process according to the display data of light intensity to original image of described external environment condition, the gray-scale value of change original image is to improve contrast and the sharpness of original image, wherein, light sensor environment-identification light intensity, and the environment bright degrees of data gathered is transmitted to central processing unit; The environment bright degrees of data that light sensor sends analyzed by central processing unit, judges the light intensity of the surround lighting of current residing environment; Current data to be displayed gray-scale distribution analyzed by central processing unit, determines the maximum setting range of GTG; And then data processing is carried out to data to be displayed, and determine backlight setting range; Data to be displayed after transmission processing to LCD MODULE completes image display;
Described carries out data processing to data to be displayed, and determines that the specific implementation step of backlight setting range is:
(1) the environmental light brightness threshold values Lth of this function is opened in setting, the time T value of timing ambient light;
(2) analyze the ambient light data that light sensor records, when environmental light brightness is less than threshold values Lth, directly raw image data is outputted to display screen; When environmental light brightness is greater than threshold values Lth, environmentally luminance brightness scope, determines the grade L value that brightness is strengthened;
(3) carry out brightness calculation according to each pixel RGB color value of original image, calculate the brightness B value of its correspondence;
(4) the L value drawn according to above-mentioned steps (2), (3) and B value, what calculate this pixel according to certain algorithm highlights coefficient A value, wherein, A value is greater than 1, and B value is larger, A value is less, could realize vast scale like this and improve low gray-scale intensity, and comparatively small scale improves high gray brightness; L value is larger, and A value should be larger;
(5) according to the coefficient A value calculated, calculating conversion is carried out to the RGB color value of each pixel of original image, the pixel R color value after conversion=A* original pixels R color value; The pixel brightness value after conversion is made to be more than or equal to original pixel brightness value;
(6) analyze the gray-scale distribution of a whole frame image data, in conjunction with the grade L value that brightness is strengthened, suitably strengthen the brightness of backlight.
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| DE112013004068B4 (en) * | 2012-08-16 | 2018-02-15 | Fujifilm Corporation | Image file creation device and display device |
| CN104376834B (en) * | 2013-08-12 | 2017-06-27 | 联想(北京)有限公司 | A kind of luminance regulating method and electronic equipment |
| TWI514369B (en) * | 2014-05-29 | 2015-12-21 | Au Optronics Corp | Signal conversion method for display image |
| CN107978264B (en) * | 2014-12-26 | 2021-06-08 | 小米科技有限责任公司 | Display brightness adjusting method and device |
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| CN105469775A (en) * | 2016-01-29 | 2016-04-06 | 广东欧珀移动通信有限公司 | Method for adjusting brightness of display screen and terminal equipment |
| CN105681728B (en) * | 2016-02-19 | 2019-12-17 | 华为技术有限公司 | Video processing method and device |
| CN105719611B (en) * | 2016-03-30 | 2018-08-07 | 青岛海信电器股份有限公司 | The show uniformity method of adjustment and device of liquid crystal display |
| CN105632447B (en) * | 2016-03-31 | 2018-05-18 | 青岛海信移动通信技术股份有限公司 | The display brightness method of adjustment and device of a kind of liquid crystal display |
| CN106406796A (en) * | 2016-09-26 | 2017-02-15 | 宇龙计算机通信科技(深圳)有限公司 | An LCD display method and device and a terminal |
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| CN107742496B (en) * | 2017-10-31 | 2020-06-05 | 武汉华星光电技术有限公司 | Method and system for improving speckle phenomenon of display picture |
| CN108711402A (en) * | 2018-05-07 | 2018-10-26 | Oppo广东移动通信有限公司 | Brightness of display screen method of adjustment and Related product |
| CN108877738A (en) * | 2018-06-20 | 2018-11-23 | 广东美的环境电器制造有限公司 | Display panel luminance control method and circuit, heater |
| CN109272917B (en) * | 2018-10-25 | 2021-09-28 | Oppo广东移动通信有限公司 | Screen brightness adjusting method and device, storage medium and electronic equipment |
| CN109616047B (en) * | 2019-01-28 | 2020-12-08 | 深圳市华星光电半导体显示技术有限公司 | Mobile equipment, display and method for eliminating ghost shadow of display |
| CN111667800B (en) * | 2020-06-16 | 2021-11-23 | 广州视源电子科技股份有限公司 | Image display parameter adjusting method and device, storage medium and terminal |
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| CN115691432B (en) * | 2022-09-16 | 2023-09-29 | 荣耀终端有限公司 | Electronic equipment, backlight module and liquid crystal display |
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Effective date of registration: 20160323 Address after: 283 No. 523000 Guangdong province Dongguan city Changan town usha BBK Avenue Patentee after: VIVO MOBILE COMMUNICATION CO., LTD. Address before: 126 No. 523860 Guangdong province Dongguan city Changan town usha BBK Avenue Patentee before: Guangdong Bubugao Electronic Industry Co., Ltd. |