CN203858849U - Backlight adjusting device, backlight module group, and display device - Google Patents
Backlight adjusting device, backlight module group, and display device Download PDFInfo
- Publication number
- CN203858849U CN203858849U CN201420247914.3U CN201420247914U CN203858849U CN 203858849 U CN203858849 U CN 203858849U CN 201420247914 U CN201420247914 U CN 201420247914U CN 203858849 U CN203858849 U CN 203858849U
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- CN
- China
- Prior art keywords
- backlight
- preset value
- electric signal
- storage unit
- regulating device
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- Expired - Fee Related
Links
- 230000001105 regulatory effect Effects 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 230000032683 aging Effects 0.000 abstract description 4
- 238000005286 illumination Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
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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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
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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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model provides a backlight adjusting device, a backlight module group, and a display device. The backlight adjusting device comprises a light-sensitive element, a preset value storage unit, a comparator, and a backlight driving circuit, wherein the light-sensitive element and the preset value storage unit are respectively connected with an input terminal of the comparator; the light-sensitive element is used for detecting the backlight intensity, and converting a light signal to a backlight intensity electric signal for outputting; the preset value storage unit is used for outputting a preset value electric signal representing a preset value; an output terminal of the comparator is connected with the backlight driving circuit, and the comparator is used for comparing the backlight intensity electric signal and the preset value electric signal, and outputting an obtained difference value to the backlight driving circuit. The backlight driving circuit is used for carrying out backlight driving according to the difference value. The backlight adjusting device is capable of keeping the backlight intensity at an ideal constant value, so that the problem of gradually darkening caused by the aging of a light emitting diode is solved.
Description
Technical field
The utility model relates to display technique, relates in particular to a kind of regulating device backlight, backlight module and display device.
Background technology
In liquid crystal display, generally adopt LED (light emitting diode) backlight module to be used as light source.Along with the increase of service time, the luminosity of LED can decline gradually.
Therefore, the liquid crystal display of selling on the market now, while just bringing into use, backlight illumination is high, and it is dazzling that user can feel.And use after a period of time, because LED is aging, backlight illumination declines, and user can think that again picture is too dark.
Common LCD brightness can manually be adjusted or by DDC/CI (Display Data Channel Command Interface, DDC command interface) software adjustment, just be fixed on a state after having adjusted always at present.Owing to lacking the mode of automatic adjusting backlight luminance, a lot of users just adjust in the situation that cannot standing luminance state.
Utility model content
(1) technical matters that will solve
The purpose of this utility model is to provide a kind of regulating device backlight, makes the backlight illumination of display device keep constant.
(2) utility model content
For achieving the above object, according to first aspect of the present utility model, provide a kind of regulating device backlight, comprise light activated element, preset value storage unit, comparer and backlight drive circuit;
Described light activated element and described preset value storage unit are connected to respectively two input ends of comparer;
Described light activated element, for detection of backlight intensity, is converted to the output of backlight intensity electric signal by light signal;
Described preset value storage unit is for exporting the preset value electric signal that represents preset value;
The output terminal of described comparer is connected to described backlight drive circuit, for backlight intensity electric signal and preset value electric signal are compared, obtains difference electric signal and exports to described backlight drive circuit.
Described backlight drive circuit is for carrying out backlight drive according to described difference electric signal.
Preferably, described light activated element is multiple, the mean value of the output electrical signals that described backlight intensity electric signal is multiple light activated elements.
Preferably, described preset value storage unit comprises connected flash element and digital-to-analog conversion element.
Preferably, described preset value storage unit comprises connected voltage source and rheostat.
Preferably, also comprise pulse-duration modulation signal generator, the output terminal of described comparer is connected to the input end of described pulse-duration modulation signal generator, and the output terminal of described pulse-duration modulation signal generator is connected to described backlight drive circuit.
According to second aspect of the present utility model, a kind of backlight module is provided, comprise above-mentioned regulating device backlight.
Preferably, described backlight module comprises backlight, and described light activated element is arranged in described backlight.
Preferably, described backlight module comprises light emitting diode.
According to second aspect of the present utility model, provide a kind of display device according to of the present utility model, comprised above-mentioned regulating device backlight or comprise above-mentioned backlight module.
Preferably, described backlight module is arranged in display device housing.
(3) beneficial effect
The regulating device backlight that the utility model embodiment provides, measure backlight illumination by light activated element, by comparing and obtain difference with default brightness value, backlight drive circuit carries out backlight drive according to this difference, backlight intensity can be remained on to a desirable steady state value, effectively having solved cause because light emitting diode is aging backlight, darkness deepens makes user experience the problem of decline.
Brief description of the drawings
Fig. 1 is according to the schematic diagram of the regulating device backlight of the utility model the first embodiment.
Fig. 2 is according to the schematic diagram of the regulating device backlight of the utility model the second embodiment.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are only for the utility model is described, and can not be used for limiting scope of the present utility model.
Fig. 1 is according to the schematic diagram of the regulating device backlight of the utility model the first embodiment, as seen from Figure 1, regulating device backlight comprises light activated element 1, and preset value storage unit 2, comparer 3 and backlight drive circuit 4 light activated elements 1 and preset value storage unit 2 are connected respectively to two input ends of comparer 3; Light activated element 1, for detection of backlight intensity, is converted to the output of backlight intensity electric signal by light signal; Preset value storage unit 2 is for exporting the preset value electric signal that represents preset value; The output terminal of comparer 3 is connected to backlight drive circuit 4, for backlight intensity electric signal and preset value electric signal are compared, the difference electric signal obtaining is exported to backlight drive circuit 4.
Principle of the present utility model is: the preset value that preset value storage unit 2 is stored is the backlight intensity electric signal obtaining under suitable backlight intensity through measuring, therefore when the actual backlight intensity electric signal recording and preset value are when unequal, just illustrate that backlight intensity, in improper interval, need to regulate.Generally speaking, if be less than preset value, illustrate that backlight illumination is inadequate, just need to promote back facet current, thereby strengthen brightness output backlight, otherwise illustrate that backlight illumination is excessive, need to reduce back facet current, thereby reduce brightness output backlight.
For the result that makes to record is more accurate, light activated element 1 can be set to multiplely, backlight intensity electric signal is the mean value of the output electrical signals of multiple light activated elements 1.
Preset value storage unit 2 can be connected flash element and digital-to-analog conversion element, or is connected voltage source and rheostat, certainly, can be also other form, as long as the electric signal of setting value output expression setting value can be set.
Comparer 3 can be realized by various circuit components, and the general knowledge that this belongs to electronic technology, does not repeat them here.
Backlight drive circuit 4 carries out backlight drive for the difference electric signal of exporting according to comparer 3, for example, when difference electric signal is, while just representing that the actual backlight intensity electric signal recording is less than preset value, to increase gradually backlight drive electric current, until difference electric signal is zero; Otherwise reduce gradually backlight drive electric current, until difference electric signal is zero.
Fig. 2 is according to the schematic diagram of the regulating device backlight of the utility model the second embodiment, be with the difference of the first embodiment, the regulating device backlight of this embodiment also comprises pulse-width signal (PWM) generator 5, the output terminal of comparer 3 is connected to the input end of pulse-duration modulation signal generator 5, and the output terminal of pulse-duration modulation signal generator 5 is connected to backlight drive circuit 4.
Thereby for example when difference electric signal is while just representing that the actual backlight intensity electric signal recording is less than preset value, the backlight drive ON time of backlight drive circuit 4 is increased, until difference electric signal is zero; Otherwise reduce gradually backlight drive ON time, until difference electric signal is zero.
The 3rd embodiment of the present utility model provides a kind of backlight module, comprises tune experiment regulating device backlight of the present utility model.Further, backlight module comprises backlight, and light activated element 1 is arranged in described backlight, to detect backlight illumination nearby, reduces error.Generally speaking, backlight module comprises light emitting diode, uses light emitting diode as light source, can certainly adopt other forms of light source.
The 4th embodiment of the present utility model provides a kind of display device, comprises backlight module of the present utility model.Further, backlight module is arranged in display device housing, the interference of backlight illumination being measured to get rid of environment.Touch control display apparatus can be for example: any product or parts with Presentation Function such as Electronic Paper, mobile phone, panel computer, televisor, display, notebook computer, digital album (digital photo frame), navigating instrument.
The regulating device backlight that the utility model embodiment provides, measure backlight illumination by light activated element, by comparing and obtain difference with default brightness value, backlight drive circuit carries out backlight drive according to this difference, backlight intensity can be remained on to a desirable steady state value, effectively having solved cause because light emitting diode is aging backlight, darkness deepens makes user experience the problem of decline.
Above embodiment is only for the utility model is described, but not to restriction of the present utility model.Although the utility model is had been described in detail with reference to embodiment; but those of ordinary skill in the art is to be understood that; the technical solution of the utility model is carried out to various combinations, revises or is equal to replacement; it does not depart from principle of the present utility model and spirit, within all should be encompassed in the protection domain of the utility model claim.
Claims (10)
1. a regulating device backlight, is characterized in that, comprises light activated element, preset value storage unit, comparer and backlight drive circuit;
Described light activated element and described preset value storage unit are connected to respectively two input ends of comparer;
Described light activated element, for detection of backlight intensity, is converted to the output of backlight intensity electric signal by light signal;
Described preset value storage unit is for exporting the preset value electric signal that represents preset value;
The output terminal of described comparer is connected to described backlight drive circuit, for backlight intensity electric signal and preset value electric signal are compared, obtains difference electric signal and exports to described backlight drive circuit;
Described backlight drive circuit is for carrying out backlight drive according to described difference electric signal.
2. regulating device backlight according to claim 1, is characterized in that, described light activated element is multiple, the mean value of the output electrical signals that described backlight intensity electric signal is multiple light activated elements.
3. regulating device backlight according to claim 1, is characterized in that, described preset value storage unit comprises connected flash element and digital-to-analog conversion element.
4. regulating device backlight according to claim 1, is characterized in that, described preset value storage unit comprises connected voltage source and rheostat.
5. according to the regulating device backlight described in claim 1-4 any one, it is characterized in that, also comprise pulse-duration modulation signal generator, the output terminal of described comparer is connected to the input end of described pulse-duration modulation signal generator, and the output terminal of described pulse-duration modulation signal generator is connected to described backlight drive circuit.
6. a backlight module, is characterized in that, comprises the regulating device backlight described in claim 1-5 any one.
7. backlight module according to claim 1, is characterized in that, described backlight module comprises backlight, and described light activated element is arranged in described backlight.
8. according to the backlight module described in claim 6 or 7, it is characterized in that, described backlight module comprises light emitting diode.
9. a display device, is characterized in that, comprises that right wants the regulating device backlight described in any one in 1-5; Or, comprise the backlight module described in any one in claim 6-8.
10. display device according to claim 9, is characterized in that, described backlight module is arranged in display device housing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420247914.3U CN203858849U (en) | 2014-05-15 | 2014-05-15 | Backlight adjusting device, backlight module group, and display device |
| PCT/CN2014/090511 WO2015172535A1 (en) | 2014-05-15 | 2014-11-06 | Backlight adjustment device, backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420247914.3U CN203858849U (en) | 2014-05-15 | 2014-05-15 | Backlight adjusting device, backlight module group, and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203858849U true CN203858849U (en) | 2014-10-01 |
Family
ID=51608691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420247914.3U Expired - Fee Related CN203858849U (en) | 2014-05-15 | 2014-05-15 | Backlight adjusting device, backlight module group, and display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN203858849U (en) |
| WO (1) | WO2015172535A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104955230A (en) * | 2015-06-12 | 2015-09-30 | 来安县新元机电设备设计有限公司 | Backlight source control circuit and display terminal |
| WO2015172535A1 (en) * | 2014-05-15 | 2015-11-19 | 京东方科技集团股份有限公司 | Backlight adjustment device, backlight module and display device |
| CN110136656A (en) * | 2019-04-24 | 2019-08-16 | 昆山龙腾光电有限公司 | Backlight module and liquid crystal display device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111562702A (en) * | 2020-06-10 | 2020-08-21 | 江苏跃马建工集团有限公司 | Backlight source with automatic backlight intensity adjustment function for display |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101399009B (en) * | 2007-09-30 | 2010-08-18 | 宇威光电股份有限公司 | Illuminating device and control method thereof |
| KR101193305B1 (en) * | 2011-08-02 | 2012-10-19 | 삼성전기주식회사 | Dimming control device, apparatus for driving led, and dimming control method |
| KR101941286B1 (en) * | 2011-12-07 | 2019-01-23 | 매그나칩 반도체 유한회사 | Led driver apparatus |
| CN103280190B (en) * | 2013-05-20 | 2015-11-25 | 深圳市华星光电技术有限公司 | A kind of backlight drive circuit, liquid crystal indicator and backlight driving method |
| CN103672538B (en) * | 2013-12-19 | 2016-07-06 | 深圳市华星光电技术有限公司 | Backlight regulating circuit and electronic installation |
| CN203858849U (en) * | 2014-05-15 | 2014-10-01 | 高创(苏州)电子有限公司 | Backlight adjusting device, backlight module group, and display device |
-
2014
- 2014-05-15 CN CN201420247914.3U patent/CN203858849U/en not_active Expired - Fee Related
- 2014-11-06 WO PCT/CN2014/090511 patent/WO2015172535A1/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015172535A1 (en) * | 2014-05-15 | 2015-11-19 | 京东方科技集团股份有限公司 | Backlight adjustment device, backlight module and display device |
| CN104955230A (en) * | 2015-06-12 | 2015-09-30 | 来安县新元机电设备设计有限公司 | Backlight source control circuit and display terminal |
| CN110136656A (en) * | 2019-04-24 | 2019-08-16 | 昆山龙腾光电有限公司 | Backlight module and liquid crystal display device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015172535A1 (en) | 2015-11-19 |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141001 |
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| CF01 | Termination of patent right due to non-payment of annual fee |