CN1886777A - 用于背光显示器中图像优化的方法和装置 - Google Patents
用于背光显示器中图像优化的方法和装置 Download PDFInfo
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- CN1886777A CN1886777A CNA2004800347609A CN200480034760A CN1886777A CN 1886777 A CN1886777 A CN 1886777A CN A2004800347609 A CNA2004800347609 A CN A2004800347609A CN 200480034760 A CN200480034760 A CN 200480034760A CN 1886777 A CN1886777 A CN 1886777A
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- display
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- image
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/20—Controlling the colour of the light
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
- G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
Description
void ScalePixels( unsigned int width, unsigned int height, unsigned char *pixelBuffer, unsigned char *ScaleTable, unsigned short *PixelScaleTable, unsigned int pixelLimit) { enum primarycolor{mred,mgreen,mblue); unsigned char red,green,blue,max; unsigned int p; unsigned short pixelScaleFactor; primarycolor maxc; for (p=O; p<PIXEL_BUFFER_SIZE;p=p+4){ red = pixelBuffer[p]; green = pixelBuffer[p+1]; blue = pixelBuffer[p+2]; // 计算最大像素设定 if(red>green) {max=red;maxc=mred;}else{max=green;maxc =mgreen;}; if(blue>max) {max=blue;maxc=mblue ;}; //确定最大像素设定是否超过限值 if(max>pixelLimit){ switch(maxc){ pixelScaleFactor=PixelScaleTable[max]; // (255*256)/ max case mred: // 设置最大值设定(对于本例,是255) // 通过低像素限值,其可设置得较低 pixelBuffer[p] = 255; // 增加像素设定 pixelBuffer[p+1]=(unsigned char)(green * pixelScaleFactor)>>8 ; // 增加像素设定 pixelBuffer[p+2]=(unsi9ned char)(blue * pixelScaleFactor)>>8 ; break; case mgreen: // 设置最大值设定(对于本例,是255) // 通过低像素限值,其可设置得较低 pixelBuffer[p+1] =255; // 增加像素设定 pixelBuffer[p] = (unsigned char)(red * pixelScaleFactor)>>8; // 增加像素设定 pixelBuffer[p+2]=(unsigned char)(blue * pixelScaleFactor)>>8; break; case mblue: // 设置最大值设定(对于本例,是255) //通过低像素限值,其可设置得较低 <dp n="d12"/> pixelBuffer[p+2]=255; //增加像素设定 pixelBuffer[p] = (unsigned char)(red * pixelScaleFactor)>>8; //增加像素设定 pixelBuffer[p+1]=(unsigned char)(green * pixelScaleFactor)>>8; break; } }else{ pixelBuffer[p]=ScaleTable [red]; pixelBuffer[p+1]=ScaleTable[green]; pixelBuffer[p+2]=ScaleTable[blue]; } } }
unsigned short *ComputePixelScaleTable() { unsigned short *PixelScaleTable; unsigned int i; PixelScaleTable=(unsigned short *)malloc(256*sizeof(unsignedshort)); PixelScaleTable[0]=0; for(i=1;i<256;i++){ PixelScaleTable[i]=(unsigned short)((255 * 256)/i); } return PixelScaleTable; }
unsigned char *ComputeScaleTable( double globalScaleFactor) { unsigned char *ScaleTable; double brightnessScaleFactor; unsigned int i,tmp; brightnessScaleFactor=1/globalScaleFactor; ScaleTable=(unsigned char *)malloc(256*sizeof(unsigned char)); for(i=0;i<256;i++){ tmp=(unsigned char)(i*brightnessScaleFactor); if(tmp>255){ ScaleTable[i]=255; }else{ ScaleTable[i]=tmp; } return ScaleTable; } void ScalePixelRectangle( unsigned int col, unsigned int row, unsigned int width, unsigned int height, unsigned char *pixelBuffer, unsigned char *ScaleTable, unsigned short *PixelScaleTable, unsigned int pixelLimit){ glReadPixels(col,row,width,height,GL_RGBA,GL_UNSIGNED_BYTE,pixelB uffer); ScalePixels(width,height,pixelBuffer,ScaleTable,PixelScaleTable,p ixelLimit); glRasterPos2i(col,row); glDrawPixels(width,height,GL_RGBA,GL_UNSIGNED_BYTE,pixelBuffer); } <dp n="d14"/> void ImageEnhance( HDC hdc, unsigned int imageWidth, unsigned int imageHeight, double globalScaleFactor) { unsigned int pixelLimit;//从globalScaleFactor计算 unsigned int row,col; unsigned char *pixelBuffer; unsigned char *ScaleTable; unsigned short *PixelScaleTable; glEnable(GL_BLEND); glBlendFunc(GL_ONE,GL_ZERO); pixelBuffer=(unsigned char *) malloc(PIXEL_BUFFER_SIZE*sizeof(unsigned char)); pixelLimit =(unsigned int)floor(globalScaleFactor*255); ScaleTable=ComputeScaleTable(globalScaleFactor); PixelScaleTable=ComputePixelScaleTable(); for(row=0;row<imageHeight;row=row+PIXEL_RECT_HEIGHT){ for(col=0;col<imageWidth-PIXEL_RECT_WIDTH; col=col+PIXEL_RECT_WIDTH){ if(row>imageHeight-PIXEL_RECT_HEIGHT){ ScalePixelRectangle(col,row,PIXEL_RECT_WIDTH,imageHeight-row,pixelBuf fer,ScaleTable,PixelScaleTable,pixelLimit); //短全矩形 }else{ ScalePixelRectangle(col,row,PIXEL_RECT_WIDTH,PIXEL_RECT_HEIGHT,pixelB uffer,ScaleTable,PixelScaleTable,pixelLimit);//正常全矩形 } } if(col>imageWidth-PIXEL_RECT_WIDTH){ if(row>imageHeight-PIXEL_RECT_HEIGHT){ ScalePixelRectangle(col,row,imageWidth-col,imageHeight-row,pixelBuffe r,ScaleTable,PixelScaleTable,pixelLimit); //短细右上角 }else{ ScalePixelRectangle(col,row,imageWidth-col,PIXEL_RECT_HEIGHT,pixelBuf fer,ScaleTable,PixelScaleTable,pixelLimit); //细端矩形 } } }
Claims (20)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US10/721,988 US7154468B2 (en) | 2003-11-25 | 2003-11-25 | Method and apparatus for image optimization in backlit displays |
US10/721,988 | 2003-11-25 | ||
PCT/US2004/041168 WO2005052907A1 (en) | 2003-11-25 | 2004-11-18 | Method and apparatus for image optimization in backlight displays |
Publications (2)
Publication Number | Publication Date |
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CN1886777A true CN1886777A (zh) | 2006-12-27 |
CN1886777B CN1886777B (zh) | 2012-01-25 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN2004800347609A Active CN1886777B (zh) | 2003-11-25 | 2004-11-18 | 用于背光显示器中图像优化的方法和装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7154468B2 (zh) |
KR (1) | KR101158588B1 (zh) |
CN (1) | CN1886777B (zh) |
WO (1) | WO2005052907A1 (zh) |
Cited By (6)
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WO2010066134A1 (zh) * | 2008-12-09 | 2010-06-17 | 光远科技股份有限公司 | 具有非均匀背光板液晶显示器均匀度补偿方法及该显示器 |
CN101419778B (zh) * | 2007-10-26 | 2011-11-09 | Lg电子株式会社 | 用于节省电力的显示装置及其控制方法 |
CN101779230B (zh) * | 2007-06-26 | 2013-01-23 | 苹果公司 | 动态背光适配 |
CN107527051A (zh) * | 2016-06-21 | 2017-12-29 | 四川大学 | 一种感知图像内容的oled低功耗显示方法 |
CN109637406A (zh) * | 2019-01-04 | 2019-04-16 | 京东方科技集团股份有限公司 | 一种显示装置的显示方法、显示装置以及可读存储介质 |
CN110599965A (zh) * | 2019-08-09 | 2019-12-20 | 深圳市美芒科技有限公司 | 图像显示方法、图像显示装置、终端设备及可读存储介质 |
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JP3927995B2 (ja) * | 2001-12-27 | 2007-06-13 | ソニー株式会社 | 画像表示制御装置と画像表示制御方法及び撮像装置 |
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2003
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-
2004
- 2004-11-18 KR KR1020067010088A patent/KR101158588B1/ko not_active IP Right Cessation
- 2004-11-18 CN CN2004800347609A patent/CN1886777B/zh active Active
- 2004-11-18 WO PCT/US2004/041168 patent/WO2005052907A1/en active Application Filing
Cited By (8)
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CN101779230B (zh) * | 2007-06-26 | 2013-01-23 | 苹果公司 | 动态背光适配 |
CN101419778B (zh) * | 2007-10-26 | 2011-11-09 | Lg电子株式会社 | 用于节省电力的显示装置及其控制方法 |
US8368724B2 (en) | 2007-10-26 | 2013-02-05 | Lg Electronics Inc. | Display apparatus and control method thereof for saving power |
WO2010066134A1 (zh) * | 2008-12-09 | 2010-06-17 | 光远科技股份有限公司 | 具有非均匀背光板液晶显示器均匀度补偿方法及该显示器 |
CN107527051A (zh) * | 2016-06-21 | 2017-12-29 | 四川大学 | 一种感知图像内容的oled低功耗显示方法 |
CN107527051B (zh) * | 2016-06-21 | 2020-05-15 | 四川大学 | 一种感知图像内容的oled低功耗显示方法 |
CN109637406A (zh) * | 2019-01-04 | 2019-04-16 | 京东方科技集团股份有限公司 | 一种显示装置的显示方法、显示装置以及可读存储介质 |
CN110599965A (zh) * | 2019-08-09 | 2019-12-20 | 深圳市美芒科技有限公司 | 图像显示方法、图像显示装置、终端设备及可读存储介质 |
Also Published As
Publication number | Publication date |
---|---|
US7154468B2 (en) | 2006-12-26 |
WO2005052907A1 (en) | 2005-06-09 |
KR20060120673A (ko) | 2006-11-27 |
US20050110740A1 (en) | 2005-05-26 |
KR101158588B1 (ko) | 2012-06-22 |
CN1886777B (zh) | 2012-01-25 |
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