CN1740856A - Electricity-saving device for liquid crystal display and method thereof - Google Patents
Electricity-saving device for liquid crystal display and method thereof Download PDFInfo
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- CN1740856A CN1740856A CN 200510047235 CN200510047235A CN1740856A CN 1740856 A CN1740856 A CN 1740856A CN 200510047235 CN200510047235 CN 200510047235 CN 200510047235 A CN200510047235 A CN 200510047235A CN 1740856 A CN1740856 A CN 1740856A
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Abstract
The electricity-saving device of liquid crystal display device includes the following components: ADC for converting analog image signal into digital signal; pulse counter for displaying data image signal outputted from ADC into picture, forming frame unit and providing it for LCD; backlight source placed on the back surface of the above-mentioned LCD for emitting light according to the acceptable current quantity; and control component for regulating current quantity authorized by backlight source according to the image state of frame unit formed on the above-mentioned pulse counter. Said invention also provides the concrete steps of said electricity-saving method.
Description
Technical field
The present invention relates to a kind of electricity-saving device for liquid crystal display and method thereof.
Background technology
At present, cathode ray tube (CRT), plasma display multiple display elements such as (PDP) are widely used in the device for image such as display or televisor.
CRT is in gray scale and have excellence in price, PDP has gone out a lot of technology at the maximization aspect developing, but compare with CRT and PDP, LCD (LCD) is light weight not only, and can also realize ultra-thinization, while is owing to remarkable high definition display characteristic, so its usable range enlarges gradually.
In addition, compare the very difficult shortcoming that realizes maximizing also because the exploitation of technology constantly overcomes, therefore we can say that its prospect is very very wide with PDP.
But PDP is opposite with it according to the luminous reproducing color therewith of self gas discharge, and LCD then only utilizes light transmission characteristics and multi-color filtrate to come reproducing color therewith, and self is not luminous, therefore must possess the backlight that is located at LCD control panel back side illuminated.
At this moment, backlight is accepted the supply of fixing voltage/current, in the back side illuminated of LCD control panel along with the display of employing LCD or the power supply of televisor are unlocked, therefore be not subjected to the restriction of image states such as gray scale and contrast, only accept fixing electric current and carry out luminous action.
As mentioned above, traditional LCD has following problem.That is, owing to,, therefore bring out unnecessary power consumption, and then improve whole power consumption no matter the state of image how, all continues to accept fixing electric current supply along with the power supply of device is unlocked.
Summary of the invention
The object of the present invention is to provide power consumption saveall and the method thereof of the LCD of economize on electricity.
The objective of the invention is to be achieved through the following technical solutions:
Electricity-saving device for liquid crystal display: the ADC that the analog image conversion of signals is become digital signal;
For the image data signal of exporting from above-mentioned ADC is shown as picture, configuration frame unit is fed to the impulse meter of LCD;
Be located at the back side of above-mentioned LCD, according to the luminous backlight of the magnitude of current of being approved;
Also has the control part of the magnitude of current of being approved according to the above-mentioned backlight of image status adjustment of the frame unit that on above-mentioned impulse meter, constitutes.
Above-mentioned control part is to regulate the magnitude of current that above-mentioned backlight approves according to the gray scale of frame unit's image of constituting on above-mentioned impulse meter.
Above-mentioned control part is the magnitude of current approved according to the above-mentioned backlight of contrast adjustment of frame unit's image of constituting on above-mentioned impulse meter.
Above-mentioned control part is according to the gray scale of frame unit's image of constituting on above-mentioned impulse meter and the magnitude of current that the above-mentioned backlight of contrast adjustment is approved.
In the LCD of the supply of accepting light by backlight, comprise following two steps:
Analysis is fed to the analytical procedure of frame unit's image of LCD;
The regulating step of the magnitude of current of the status adjustment backlight of the image that comes out according to above-mentioned analysis.
The LCD power-saving method: the state of the image that above-mentioned analysis is come out to the feature of the step that the magnitude of current of backlight is regulated is:
The gray scale and the standard value of the image that above-mentioned analysis is come out compare, and the step of the backlight current amount being regulated according to its result.
The state of the image that above-mentioned analysis is come out to the feature of the step that the magnitude of current of backlight is regulated is: the contrast and the standard value of the image that above-mentioned analysis is come out compare, the step of the backlight current amount being regulated according to its result.
The state of the image that above-mentioned analysis is come out to the feature of the step that the magnitude of current of backlight is regulated is: the gray scale of the image that above-mentioned analysis is come out and contrast and each standard value compare, the step of the backlight current amount being regulated according to its result.
The state of the image that above-mentioned analysis is come out to the feature of the step that the magnitude of current of backlight is regulated is: when having at least one to be relevant criterion value when following in the gray scale of the image that above-mentioned analysis is come out and the contrast, reduce the step of backlight current amount.
The step that the state of the image that above-mentioned analysis is come out is regulated the magnitude of current of backlight is sent out feature: when the gray scale of the image that comes out when above-mentioned analysis and contrast are higher than each standard value, the backlight current amount is maintained the step of set value.
Advantage of the present invention and effect are:
LCD power consumption saveall of the present invention and method are according to the state of image promptly, and gray scale and contrast reduce backlight current, thus can prevent unnecessary power consumption, thus reach the effect of saving power consumption.
Description of drawings
Fig. 1 is the block diagram based on LCD power consumption saveall of the present invention;
Fig. 2 is for showing the procedure chart based on LCD power consumption reduction method of the present invention.
The components and parts of accompanying drawing major part
11:ADC (digital converter) 12: impulse meter
13:LCD 14: backlight
15: power control part 16: control part
Embodiment
Below, LCD power consumption saveall of the present invention and the suitable embodiment of method are described in detail as follows with reference to accompanying drawing:
Based on LCD power consumption saveall of the present invention as shown in Figure 1, be to constitute by following components.That is, the analog image conversion of signals is become the ADC (11) of digital signal; The impulse meter (12) that is fed to LCD (13) after the digital image signal configuration frame unit of output from above-mentioned ADC (11); Be arranged on the back side of above-mentioned LCD (13), according to the luminous backlight (14) of the magnitude of current of approval; Control the power control part (15) of the magnitude of current of above-mentioned backlight (14); And the control part (16) of controlling above-mentioned power control part (15).Control part is as follows to the control of power control part.That is, analyze the picture of formation in above-mentioned impulse meter (12), respectively this and relevant criterion value are compared after detecting gray scale and contrast, and regulate the magnitude of current that above-mentioned backlight (14) is approved according to its comparative result.
At this moment, in control part (16), should possess a kind of software or hardware at least with following function.Promptly, average gray and contrast to frame unit's image of formation in impulse meter (12) detect, they are compared with the relevant criterion value respectively, and judge whether to regulate the software or the hardware of backlight (14) magnitude of current according to above-mentioned comparative result.
So the LCD power consumption reduction method of the present invention that constitutes is described as follows with reference to Fig. 1 and Fig. 2:
If supposing the enforcement example of formation of the present invention is the LCD televisor, at first, receives the analog image signal post-processing by tuner and become intermediate frequency.
Afterwards, be input on the impulse meter (12) after the above-mentioned analog image signal that is processed into intermediate frequency converts digital signal to by ADC (11).
Then, above-mentioned impulse meter (12) can be presented on the LCD (13) for the digital image signal that makes output from above-mentioned ADC (11), and configuration frame unit is fed on the LCD (13).
Then, the image of the frame unit of control part (16) pulse count device (12) is analyzed (S21).
Then, control part (16) detects the average gray and the contrast (S22) of the picture image that above-mentioned analysis comes out.
Control part (16) judges that the above-mentioned average gray that detects is whether below the standard grayscale scope (S23) afterwards.
At this moment, standard grayscale has been stored in control part (16) internal storage as the standard grayscale value that reduces backlight (14) electric current.
Prior art is not considered the gray scale of image all the time and is kept fixing backlight current, but in fact, do not watch effect even the electric current of the image minimizing backlight below certain gray scale also can not influence.
Therefore, in the production process, calculate by experiment not think can influence the gray-scale value of watching effect after, this is decided to be standard grayscale is stored on the control part (16).
Then, be standard grayscale when following if the result of above-mentioned judgement (S23) shows detected average gray, control part (16) is then controlled power control part (15), makes it reduce to the setting (S26) that backlight (14) is approved electric current.
At this moment, the minimizing value of electric current depends on the kind and the characteristic of the product that LCD is suitable for.
In addition, not standard grayscale when following if the result of above-mentioned judgement (S23) shows detected average gray, then control part (16) judges whether the contrast of above-mentioned detected picture image is (S24) below the standard contrast.
At this moment, standard contrast has been stored in control part (16) internal storage as the standard contrast value that reduces backlight (14) electric current.
Above-mentioned standard contrast also is to think that in the production process being unlikely influence watches that the contrast value of effect comes out to be stored on the control part (16) by certain experimental calculation.
Then, be standard contrast when following if the result of above-mentioned judgement (S24) shows detected contrast, then control power control part (15), make it reduce to the setting (S26) that backlight (14) is approved electric current.
In addition, not standard contrast when following if the result of above-mentioned judgement (S24) shows the contrast detect, control part (16) then maintains electric current that backlight is approved set value (S25).
That is, as when belonging to the situation that reduces backlight current, then be increased to set value, otherwise it is just passable to keep former state.
Here, the present invention illustrated simultaneously and has been suitable for as the gray scale of the criterion of regulating backlight (14) electric current and the embodiment of contrast, even but be suitable for gray scale and contrast respectively and implement, do not need to append in addition structure and can realize yet.
In addition, the process before the backlight current of the invention described above is regulated is that unit carries out repeatedly with the frame.
Claims (10)
1. electricity-saving device for liquid crystal display is characterized in that the analog image conversion of signals is become the ADC of digital signal;
For the image data signal of exporting from above-mentioned ADC is shown as picture, configuration frame unit is fed to the impulse meter of LCD;
Be located at the back side of above-mentioned LCD, according to the luminous backlight of the magnitude of current of being approved;
Also has the control part of the magnitude of current of being approved according to the above-mentioned backlight of image status adjustment of the frame unit that on above-mentioned impulse meter, constitutes.
2. the described battery saving arrangement of root a tree name claim 1 is characterized in that above-mentioned control part is to regulate the magnitude of current that above-mentioned backlight approves according to the gray scale of the frame unit's image that constitutes on above-mentioned impulse meter.
3. the described battery saving arrangement of root a tree name claim 1 is characterized in that above-mentioned control part is the magnitude of current approved according to the above-mentioned backlight of contrast adjustment of the frame unit's image that constitutes on above-mentioned impulse meter.
4. the described battery saving arrangement of root a tree name claim 1 is characterized in that above-mentioned control part is according to the gray scale of the frame unit's image that constitutes and the magnitude of current that the above-mentioned backlight of contrast adjustment is approved on above-mentioned impulse meter.
5. LCD power-saving method is characterized in that comprising following two steps in the LCD of the supply of accepting light by backlight:
Analysis is fed to the analytical procedure of frame unit's image of LCD;
The regulating step of the magnitude of current of the status adjustment backlight of the image that comes out according to above-mentioned analysis.
6. the described LCD power-saving method of root a tree name claim 5, the state that it is characterized in that the image that above-mentioned analysis is come out to the feature of the step that the magnitude of current of backlight is regulated is:
The gray scale and the standard value of the image that above-mentioned analysis is come out compare, and the step of the backlight current amount being regulated according to its result.
7. the described LCD power-saving method of root a tree name claim 5, the state that it is characterized in that the image that above-mentioned analysis is come out to the feature of the step that the magnitude of current of backlight is regulated is: the contrast and the standard value of the image that above-mentioned analysis is come out compare, the step of the backlight current amount being regulated according to its result.
8. the described LCD power-saving method of root a tree name claim 5, the state that it is characterized in that the image that above-mentioned analysis is come out to the feature of the step that the magnitude of current of backlight is regulated is: the gray scale of the image that above-mentioned analysis is come out and contrast and each standard value compare, the step of the backlight current amount being regulated according to its result.
9. the described LCD power-saving method of root a tree name claim 5, the state that it is characterized in that the image that above-mentioned analysis is come out to the feature of the step that the magnitude of current of backlight is regulated is: when having at least one to be relevant criterion value when following in the gray scale of the image that above-mentioned analysis is come out and the contrast, reduce the step of backlight current amount.
10. the described LCD power-saving method of root a tree name claim 5, it is characterized in that step that the state of the image that above-mentioned analysis is come out is regulated the magnitude of current of backlight sends out feature and be: when the gray scale of the image that comes out when above-mentioned analysis and contrast are higher than each standard value, the backlight current amount is maintained the step of set value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100472357A CN100395595C (en) | 2005-09-20 | 2005-09-20 | Electricity-saving device for liquid crystal display and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100472357A CN100395595C (en) | 2005-09-20 | 2005-09-20 | Electricity-saving device for liquid crystal display and method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN1740856A true CN1740856A (en) | 2006-03-01 |
| CN100395595C CN100395595C (en) | 2008-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100472357A Expired - Fee Related CN100395595C (en) | 2005-09-20 | 2005-09-20 | Electricity-saving device for liquid crystal display and method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568396A (en) * | 2007-03-26 | 2012-07-11 | 日本电气株式会社 | Mobile phone terminal and corresponding method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3591213B2 (en) * | 1997-05-09 | 2004-11-17 | ソニー株式会社 | Liquid crystal display device and adjustment method thereof |
| CN2457695Y (en) * | 2000-12-27 | 2001-10-31 | 天津环球磁卡股份有限公司 | Poor light power saving detection controller of hand held equipment |
| US6762742B2 (en) * | 2000-12-29 | 2004-07-13 | Samsung Electronics Co., Ltd. | Apparatus and method for automatic brightness control for use in liquid crystal display device |
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- 2005-09-20 CN CNB2005100472357A patent/CN100395595C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568396A (en) * | 2007-03-26 | 2012-07-11 | 日本电气株式会社 | Mobile phone terminal and corresponding method thereof |
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| Publication number | Publication date |
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| CN100395595C (en) | 2008-06-18 |
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Owner name: NANJING LG XINGANG DISPLAY CO., LTD. Free format text: FORMER OWNER: LG ELECTRONICS (SHENYANG) CO., LTD. Effective date: 20070511 |
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Effective date of registration: 20070511 Address after: 210038 No. 346 Yao Yao Avenue, Nanjing economic and Technological Development Zone, Jiangsu, China Applicant after: LG Electronics Nanjing Display Co., Ltd. Address before: 110179 35,40, hi tech Development Zone, Liaoning, Shenyang Applicant before: LG Electronic (Shenyang) Co., Ltd. |
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