CN1755782A - Apparatus and method for controlling brightness of display device - Google Patents
Apparatus and method for controlling brightness of display device Download PDFInfo
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- CN1755782A CN1755782A CN 200410050532 CN200410050532A CN1755782A CN 1755782 A CN1755782 A CN 1755782A CN 200410050532 CN200410050532 CN 200410050532 CN 200410050532 A CN200410050532 A CN 200410050532A CN 1755782 A CN1755782 A CN 1755782A
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- brightness
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Abstract
The invention relates to image brightness control device and method while to decrease power consumption for display device. Wherein, the control method comprises following stages: deciding whether user regulates brightness data, if yes, to adapt regulated data, regulating image signal DC level and light source brightness level; according to regulated levels, displaying image signal. This invention can decrease electric consumption at maximum limit.
Description
Technical field
The present invention relates to a kind of display device, relate in particular to a kind of brightness controlling device and method of display device of more effective control picture brightness.
Background technology
In recent years, the restriction of existing television image size has been caused exploitation and appearance to big picture, ultrathin display device made the exploitation of projection display system seem important.Wherein utilize the projector Projector and the popularizing of projection P rojection image display of cathode-ray tube CRT (Cathode Ray Tube), LCD LCD (Liquid Crystal Display), liquid crystal on silicon LCOS (Liquid Crystal on Silicon) or the luminous processing of numeral DLP display devices such as (Digital LightProcessing) to increase sharply.
Here, specific visibility is superior mutually with cathode-ray tube CRT as a kind of liquid crystal display LCD plate of polarized light type display device, not only average power drawn is also lacked than cathode-ray tube CRT simultaneously, and thermal value is also few, therefore with plasma display panel PDP (Plasma Display Panel) or field emission display device FED (Field Emission Display) as cross-centennial display devices such as mobile phone, computer monitor, TV in recent years, be subject to people's attention.
After this LCD LCD is meant that as the projection display apparatus of display device the display device of red with having (Red), green (Green), blue (Blue) three kinds of primary colours is luminous, utilize projecting lens (ProjectionLens) and catoptron, image is carried out projection amplify back final picture system that forms image on screen.
The principle of work of LCD LCD is to inject the intermediate material liquid crystal of solid and liquid in the middle of two thin glass of process special processing, and have the arrangement generation light and shade of the voltage difference conversion liquid crystal molecule of using the lower glass plate upper electrode, and image is shown.Though LCD has above-mentioned principle of work,, therefore, displaying contents needs light source for being discerned with vision because the display board oneself of literal or image can not produce light.
Below, with reference to Fig. 1, the brightness controlling device of the LCD LCD projected image equipment of conventional art is described.
The brightness controlling device of conventional art liquid crystal display is to be made of following structure: the user imports brightness data and the user interface (User Interface) 1 that is provided with; Export the control part 2 that brightness data is provided with by user interface 1; Receive the brightness data of control part 2 outputs, and adjust the image display process portion (Video DisplayProcessor) 3 of picture signal direct current DC output level according to the access of relevant register; According to the direct current DC output level of in image display process portion 3, adjusting, the liquid crystal display LCD plate 4 that picture signal is shown; Light is offered the lamp source 5 of liquid crystal display LCD plate 4.
If the user has adjusted intensity level by user interface 1, then control part 2 is adjusted the brightness of picture signal according to the brightness data of adjusting to the control of image display process portion 3 register values.
That is, come display brightness by the direct current DC output level of adjusting picture signal; Here, direct current DC level is big more, so just exports the brighter image of brightness.
Below, the brightness control method of conventional art liquid crystal display LCD plate projection display apparatus is described in detail.
As shown in Figure 2, at first, judge the user, whether adjust menu brightness has been carried out adjusting (S1) by brightness by user interface 1.
If judged result (S1) is that the user adjusts brightness, then the brightness data of user's adjustment is sent to image display process portion 3 (S2) by IC interior control bus IIC communication.
Then, image display process portion 3 receives from the brightness data of control part 2 inputs, and changes the direct current DC output level (S3-S4) of picture signal by the setting of corresponding registers.
Then, by the brightness of the direct current DC output level that changes, form picture signal (S5) at liquid crystal display LCD plate 4.
Therefore, traditional liquid crystal display LCD plate projection display apparatus normally comes the control chart image brightness by adjusting direct current DC output level.
But, brightness controlling device and method thereof that the Projection Display of conventional art is provided with, the direct current DC output level by enforceable adjustment picture signal comes the control chart image brightness.At this moment, owing to export 100% brightness all the time, consumed power simultaneously is so cause the energy loss of light source as the lamp source of liquid crystal display LCD plate light source.That is,, there is the problem that reduces system effectiveness from the angle of power consumption.
Summary of the invention
The present invention provides a kind of brightness controlling device and method of display device in order to solve the problems of the technologies described above, purpose can reduce the power consumption that is caused by light source when providing more effective control brightness.
The brightness controlling device of display device of the present invention in order to achieve the above object is to be made of following structure in having liquid crystal display LCD plate, display device as the lamp source of liquid crystal display LCD plate light source: for the user adjusts the user interface that brightness data is provided with; According to brightness data, for adjusting the image display process portion that image direct current DC level is provided with; According to brightness data, for adjusting the lamp source drive division that the lamp source intensity level is provided with; If the user has adjusted brightness data by user interface, the picture brightness that adapts with controlled brightness data for output is then controlled and the control part that is provided with image display process portion and drive division.
Above-mentioned lamp source drive division is to be made of following structure: the digital to analog converter that is provided with for the direct supply input that will receive is transformed into the needed AC power of lamp source; According to control part control, the submaster controller that is provided with for the AC power output level of control figure analog converter.
The brightness control method of display device of the present invention in order to achieve the above object, be to be made of the following stage in the display device with liquid crystal display LCD plate, lamp source, image display process portion and lamp source drive division: whether the user adjusts the stage that brightness data is judged; Adjusted brightness data if judged result is the user, then in order to adapt with the brightness data of adjusting, the intensity level to light source when regulating the direct current DC level of picture signal carries out the adjusting stage; According to direct current DC level that is conditioned and light-source brightness level, picture signal is carried out the demonstration stage.
The adjusting stage of above-mentioned picture signal DC level is to receive the input of the brightness data that the user adjusts from image display process portion, and will receive the brightness data of importing set the flat stage of picture signal output DC of adjusting in register.
The above-mentioned lamp source intensity level adjusting stage is to receive with the input of producing the brightness data of adjusting from the lamp source drive division, and for the brightness data with input adapts, changes lamp source voltage and regulate the lamp source intensity level stage.
Advantageous effect of the present invention:
The brightness controlling device of display device of the present invention and method are if want to control picture brightness, then because not only to video level, and the level of lamp source are controlled simultaneously, therefore have and reduce the effect that system power consumes to greatest extent.
Description of drawings
Fig. 1 is the brightness controlling device block diagram of conventional art projected image equipment.
Fig. 2 is the brightness control method process flow diagram of conventional art projected image equipment.
Fig. 3 is the brightness controlling device block diagram of display device of the present invention.
Fig. 4 is the brightness control method process flow diagram of display device of the present invention.
Fig. 5 is that the menu screen presentation graphs is adjusted in brightness.
The major part symbol description of accompanying drawing:
10: user interface; 20: control part; 30: image display process portion; 40: LCD panel; 50: lamp source; 60: the lamp source drive division; 61: submaster controller; 62: digital to analog converter.
Embodiment
Brightness controlling device and method to display device of the present invention are described in detail as follows with reference to accompanying drawing:
At first, describe as follows with reference to Fig. 3 to the brightness controlling device of display device of the present invention:
As shown in Figure 3, the brightness controlling device of display device of the present invention is to be made of following structure in having liquid crystal display LCD plate 40, display device as the lamp source 50 of liquid crystal display LCD plate 40 light sources: for the user adjusts the user interface 10 that brightness data is provided with; According to brightness data, for adjusting the image display process portion 30 that image direct current DC level is provided with; According to brightness data, for adjusting the lamp source drive division 60 that lamp source 50 intensity levels are provided with; If the user has adjusted brightness data by user interface 10, the picture brightness that adapts with controlled brightness data for output is then controlled and the control part 20 that is provided with image display process portion 30 and lamp source drive division 60.
At this moment, lamp source drive division 60 is to be made of following structure: digital simulation (D/A) transducer 62 that is provided with for the direct current DC power supply input that will receive is transformed into lamp source 50 needed interchange AC power supplies; According to control part 20 control, the submaster controller 61 that is provided with for the interchange AC power supplies output level of control figure analog converter 62.
The brightness controlling device of display device of the present invention, if the user adjusts by 10 pairs of brightness datas of user interface, then control part 20 receives the communication of passing through IC interior bus IIC, transmits the brightness data of being adjusted by the user.
Then, control part 20 comes control chart as display process portion 30 and lamp source drive division 60 according to the brightness that is transfused to; At first brightness data is sent to separately image display process portion 30 and lamp source drive division 60 here.
At this moment, lamp source drive division 60 is controlled lamp source 50 according to brightness data by the output voltage of selecting digital to analog converter 62; And image display process portion 30 sets brightness data in corresponding registers, and the brightness of small part is controlled in the variation of the direct current dc voltage level by picture signal.
Below, the brightness control method of the display device of the present invention of above-mentioned formation is elaborated.
As shown in Figure 4, at first, judge whether the user has adjusted brightness (S10) by user interface 10.
At this moment, user interface 10 for example, can be that menu is adjusted in brightness, and brightness is adjusted menu as shown in Figure 5, and pattern is provided on the picture with on-screen display menus (OSD:On Screen Display), thereby the user directly adjusts/imports brightness data.
Adjusted brightness data if judged result (S10) is the user by brightness adjustment menu,, be sent to image display process portion 30 and lamp source drive division 60 (S20) separately then with controlled brightness data.
Then, image display process portion 30 changes the brightness register value according to the brightness data from control part 20 inputs.The submaster controller 61 of lamp source drive division 60 receives the input of brightness data from control part 20 simultaneously, and according to the brightness data that is transfused to, adjusts the interchange AC power supplies output level (S30) of digital to analog converter 62.
For example, suppose that lamp source 50 selects brightness with 5 grades (Grade), then as shown in table 1,5 stage brightness of brightness data and lamp source are complementary into 5 grades.
Table 1
| Brightness data | Lamp source brightness |
| 0-20 | |
| 21-40 | |
| 41-60 | |
| 61-80 | |
| 81-100 | |
Then, submaster controller 61 is controlled the interchange AC level of supplying with lamp source 50 for optionally output and the lamp source brightness that brightness data adapts by control figure analog converter 62.
That is, lamp source 50 will be exported the brightness corresponding to the interchange AC power supplies level of digital to analog converter 62 outputs.
For example, if the supposition user is adjusted into 50 with brightness data, then lamp source 50 is in order to export corresponding to ' the brightness of lamp source 3 ' level, the interchange AC power supplies output level of control figure analog converter 62, in order to have from 40 to 60 intermediate value 50, change the brightness register value of image display process portion 30 simultaneously at the direct current DC of picture signal level.
Then, image display process portion 30 changes the laggard line output of direct current DC level (S40) of picture signal according to brightness data by control brightness register value.
Then, according to the direct current DC output level of oneself variation and the intensity level of lamp source 50, on liquid crystal display LCD plate 40, form picture signal (S50).
Therefore, the present invention is the brightness adjustment according to the user, controls the brightness of lamp source by the direct current DC level that changes picture signal.
Claims (5)
1, have LCD panel, as the brightness controlling device of the display device of the lamp source of LCD panel light source, it is characterized in that it being to constitute by following structure:
For the user adjusts the user interface that brightness data is provided with;
According to brightness data, for adjusting the image display process portion that the image DC level is provided with;
According to brightness data, for adjusting the light source drive part that the light-source brightness level is provided with;
If the user has adjusted brightness data by user interface, the picture brightness that adapts with controlled brightness data for output is then controlled and the control part that is provided with image display process portion and drive division.
2, the brightness controlling device of display device according to claim 1 is characterized in that above-mentioned lamp source drive division is to be made of following structure:
The digital to analog converter that is provided with for the direct supply input that will receive is transformed into the needed AC power of lamp source;
According to control part control, the submaster controller that is provided with for the AC power output level of control figure analog converter.
3, the brightness control method of display device according to claim 1 is characterized in that it being to be made of the following stage:
Whether the user adjusts the stage that brightness data is judged;
Adjusted brightness data if judged result is the user, then in order to adapt with the brightness data of adjusting, the intensity level to lamp source when regulating the DC level of picture signal carries out the adjusting stage;
According to DC level that is conditioned and light-source brightness level, picture signal is carried out the demonstration stage.
4, the brightness control method of display device according to claim 3, the adjusting stage that it is characterized in that the picture signal DC level is to receive the input of the brightness data that the user adjusts from image display process portion, and will receive the brightness data of importing set the flat stage of picture signal output DC of adjusting in register.
5, the brightness control method of display device according to claim 3, it is characterized in that the lamp source intensity level adjusting stage is the input that receives the brightness data of user's adjustment from the lamp source drive division, and, change lamp source voltage and regulate the lamp source intensity level stage for the brightness data with input adapts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410050532 CN1755782A (en) | 2004-09-29 | 2004-09-29 | Apparatus and method for controlling brightness of display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410050532 CN1755782A (en) | 2004-09-29 | 2004-09-29 | Apparatus and method for controlling brightness of display device |
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| CN1755782A true CN1755782A (en) | 2006-04-05 |
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| CN 200410050532 Pending CN1755782A (en) | 2004-09-29 | 2004-09-29 | Apparatus and method for controlling brightness of display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329458B (en) * | 2007-06-20 | 2010-09-22 | 青岛海信电器股份有限公司 | Method and device for adjusting liquid crystal display contrast |
| WO2017185829A1 (en) * | 2016-04-28 | 2017-11-02 | 京东方科技集团股份有限公司 | Display |
-
2004
- 2004-09-29 CN CN 200410050532 patent/CN1755782A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329458B (en) * | 2007-06-20 | 2010-09-22 | 青岛海信电器股份有限公司 | Method and device for adjusting liquid crystal display contrast |
| WO2017185829A1 (en) * | 2016-04-28 | 2017-11-02 | 京东方科技集团股份有限公司 | Display |
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