CN101630494B - Method for improving dynamic contrast ratio of liquid crystal display - Google Patents
Method for improving dynamic contrast ratio of liquid crystal display Download PDFInfo
- Publication number
- CN101630494B CN101630494B CN200910305810A CN200910305810A CN101630494B CN 101630494 B CN101630494 B CN 101630494B CN 200910305810 A CN200910305810 A CN 200910305810A CN 200910305810 A CN200910305810 A CN 200910305810A CN 101630494 B CN101630494 B CN 101630494B
- Authority
- CN
- China
- Prior art keywords
- picture
- display
- lcd
- background light
- dynamic contrast
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The invention relates to a method for improving dynamic contrast ratio of a liquid crystal display, comprising the following steps: a, outputting images by a display card; b. inputting image signals to a display through an interface; and c. starting the DCR function by the display. The method is characterized in that: the liquid crystal display MCU judges whether the image input to the display isan all-black image or not; if not, the MCU calculates the scale of images of the display and the backlight brightness is adjusted; and if so, the MCU controls closing the backlight at a certain time length.
Description
Technical field:
The object of the present invention is to provide a kind of method that improves the LCD dynamic contrast.
Background technology:
The microcomputer user is a demonstration effect at present; Require increasingly high to LCD dynamic contrast (dynamic contrast=white picture brightness/black picture brightness); But dynamic contrast is not the technical specification of Panel itself, but the technical parameter that exists as this complete machine of display.
Be that [MCU (Micro Controller Unit) Chinese is a multipoint control unit for MCU through display interior in the prior art; Claim one chip microcomputer (Single Chip Microcomputer) again; Be called for short single-chip microcomputer]; The outside input signal of identification is controlled panel backlight bright dark, and (for example: when input was white picture, MCU control was backlight for the brightest; Input is that MCU control is backlight for the darkest when deceiving picture; Other picture calculates white and black ratio fine setting backlight).White picture brightness receives the restriction of the high-high brightness specification of panel own, the space that does not promote again, but black picture minimum brightness can be infinitely near 0; So be the raising dynamic contrast in the prior art, can be with the minimum brightness of deceiving picture infinitely near 0, promptly when deceiving picture; Control backlight for the darkest, but the lamp current that brightness backlight is provided by Power control, panel has the minimum current specification; If the too little backlight lamp tube job insecurity of electric current has the phenomenon that picture dodges, influence display effect; Power may get into protection mechanism because electric current is too little simultaneously, can make backlight can't lighting again.
Summary of the invention:
The object of the present invention is to provide a kind of method that improves the LCD dynamic contrast, when this method improves the LCD dynamic contrast, help guaranteeing the operate as normal of LCD picture.
The present invention realizes through following technical scheme:
The present invention improves the method for LCD dynamic contrast, may further comprise the steps:
A, by video card output picture;
B, picture signal are input to display through interface;
C, display are opened the DCR function;
It is characterized in that:
Whether d, the picture of judging input display through LCD MCU are black picture entirely;
If not black full picture then by the gray scale of MCU calculation display picture, is regulated backlight illumination;
If black full picture, and lasting certain time length are then closed background light by MCU control, this duration is 10 seconds-18 seconds.
The inventive method is through at complete black picture, and during lasting certain time length, closes background light by MCU control, thereby when improving dynamic contrast, can not influence picture display effect because of the generation of phenomenons such as the too little backlight lamp tube job insecurity of electric current again.
Description of drawings:
Fig. 1 is the workflow diagram of the inventive method.(being the present invention's technology among the figure in the frame of broken lines)
Notes 1, MCU (Micro Controller Unit) Chinese are multipoint control unit; Claim one chip microcomputer (Single Chip Microcomputer) again; Be called for short single-chip microcomputer; Be meant appearance and development thereof, with the CPU of computing machine, RAM, ROM, regularly number device and multiple I/O interface are integrated on a slice chip, form the computing machine of chip-scale along with large scale integrated circuit
DCR is beautiful, and special contrast optimisation technique is judged the picture overall brightness automatically, through weakening than dark areas brightness, effectively different color range levels is precisely reduced, and makes picture detail more clear than technology (Dynamic Contrast Ratio), and level is clearly more demarcated.
The LED background light is a light emitting diode.
The CCFL background light is a CCFL.
Embodiment:
The present invention improves the method for LCD dynamic contrast, may further comprise the steps:
A, by video card output picture;
B, picture signal are input to display through interface;
C, display are opened the DCR function;
Then LCD MCU judge input display picture whether for deceiving picture entirely;
If not black full picture then by the gray scale of MCU calculation display picture, is regulated backlight illumination;
If black full picture, and lasting certain time length are then closed background light by MCU control, this duration is 10 seconds-18 seconds, preferably 15 seconds.
When the LCD panel is backlight when being the LED light emitting diode, MCU output backlight illumination control signal is to liquid crystal panel LED-backlit power panel, and perhaps MCU output cut-off signals is given liquid crystal panel LED-backlit power panel, and making the LED electric current is 0, and LED-backlit is promptly closed.
When the LCD panel was CCFL CCFL, MCU output cut-off signals was given the booster power plate, and promptly the booster power plate does not have electric current to output to CCFL, and the electric current of CCFL is 0, and CCFL CCFL is in off state.
Claims (4)
1. method that improves the LCD dynamic contrast may further comprise the steps:
A, by video card output picture;
B, picture signal are input to display through interface;
C, display are opened the DCR function;
It is characterized in that:
Whether d, the picture of judging input display through the LCD multipoint control unit are black picture entirely;
If not black full picture then by the gray scale of multipoint control unit calculation display picture, is regulated background light brightness;
If black full picture, and lasting certain time length are then closed background light by multipoint control unit control, this duration is 10 seconds-18 seconds.
2. the method for raising LCD dynamic contrast according to claim 1; It is characterized in that: when the panel of LCD background light is light emitting diode; Multipoint control unit output background light brightness control signal is to liquid crystal panel background light power panel; Perhaps multipoint control unit output cut-off signals is given liquid crystal panel background light power panel, and making led current is 0, and the light emitting diode background light is promptly closed.
3. the method for raising LCD dynamic contrast according to claim 1; It is characterized in that: when panel of LCD is CCFL; Multipoint control unit output cut-off signals is given the booster power plate; Be that the booster power plate does not have electric current to output to CCFL, the electric current of CCFL is 0, and CCFL is in off state.
4. the method for raising LCD dynamic contrast according to claim 1 is characterized in that: said duration is 15 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910305810A CN101630494B (en) | 2009-08-19 | 2009-08-19 | Method for improving dynamic contrast ratio of liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910305810A CN101630494B (en) | 2009-08-19 | 2009-08-19 | Method for improving dynamic contrast ratio of liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101630494A CN101630494A (en) | 2010-01-20 |
| CN101630494B true CN101630494B (en) | 2012-09-05 |
Family
ID=41575581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910305810A Expired - Fee Related CN101630494B (en) | 2009-08-19 | 2009-08-19 | Method for improving dynamic contrast ratio of liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101630494B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105590588B (en) * | 2015-12-21 | 2018-06-29 | 武汉华星光电技术有限公司 | Backlight adjusting method, liquid crystal display device and electronic equipment |
| CN105513542B (en) * | 2016-01-13 | 2018-07-24 | 昆山龙腾光电有限公司 | A kind of backlight drive device and method of liquid crystal display device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101295467A (en) * | 2007-04-29 | 2008-10-29 | 瑞昱半导体股份有限公司 | Contrast control device and control method thereof |
| US20080266240A1 (en) * | 2007-04-27 | 2008-10-30 | Realtek Semiconductor Corp. | Apparatus and method for contrast control |
-
2009
- 2009-08-19 CN CN200910305810A patent/CN101630494B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080266240A1 (en) * | 2007-04-27 | 2008-10-30 | Realtek Semiconductor Corp. | Apparatus and method for contrast control |
| CN101295467A (en) * | 2007-04-29 | 2008-10-29 | 瑞昱半导体股份有限公司 | Contrast control device and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101630494A (en) | 2010-01-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103077684B (en) | A kind of backlight adjusting method, device and display screen | |
| WO2017088420A1 (en) | Over-driving control method for local dimming and apparatus therefor | |
| CN100367328C (en) | Projection type video display apparatus | |
| CN100516987C (en) | Liquid crystal display and its automatic regulating method | |
| CN101578001B (en) | Method for adjusting direct LED backlight color and adjusting device thereof | |
| CN105976770B (en) | A kind of method, apparatus and system of control dim signal | |
| WO2018133182A1 (en) | Luminance adjusting method for led display screen system | |
| CN109285511A (en) | LCD panel control method and device, storage medium, washing machine and electric appliance | |
| CN102543001A (en) | Backlight source brightness regulation method, system and device | |
| CN201374162Y (en) | Electronic music score display device | |
| WO2022161094A1 (en) | Display device drive method, display device, and computer readable storage medium | |
| CN101630494B (en) | Method for improving dynamic contrast ratio of liquid crystal display | |
| CN102810298A (en) | Method and device for controlling signal-processing of the backlight module of the display device | |
| CN101655210A (en) | Backlight system of liquid crystal display apparatus | |
| CN102176743B (en) | Method for delaying shutdown and television terminal | |
| CN101675376A (en) | Be used to adjust the method and system of backlight illumination | |
| CN101777322A (en) | Liquid crystal display television system | |
| CN206363744U (en) | The adjustable energy-conservation display screen of brightness | |
| CN201868080U (en) | Backlight brightness control device | |
| CN102221768B (en) | Projection machine contrast reinforcing system and reinforcing method thereof | |
| CN201584141U (en) | Device improving dynamic contrast of liquid crystal display | |
| CN201323695Y (en) | Reading lamp automatic light regulating device | |
| CN105321497A (en) | All-in-one machine power-up display LOGO and implementation method for sound and brightness control | |
| CN105609061B (en) | A kind of modulator approach of LCOS liquid crystal device, apparatus and system | |
| CN110286518A (en) | Display module and its control method and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20160819 |