CN107293261B - A kind of combination brightness uniformity control system and its control method - Google Patents
A kind of combination brightness uniformity control system and its control method Download PDFInfo
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- CN107293261B CN107293261B CN201710639387.9A CN201710639387A CN107293261B CN 107293261 B CN107293261 B CN 107293261B CN 201710639387 A CN201710639387 A CN 201710639387A CN 107293261 B CN107293261 B CN 107293261B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 56
- 230000035807 sensation Effects 0.000 claims abstract description 44
- 230000003287 optical effect Effects 0.000 claims abstract description 29
- 238000011897 real-time detection Methods 0.000 claims abstract description 4
- 235000019615 sensations Nutrition 0.000 claims description 39
- 238000010586 diagram Methods 0.000 description 4
- 230000032683 aging Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003012 network analysis Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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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
-
- 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
- G09G3/3413—Details of control of colour illumination sources
-
- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a kind of combination brightness uniformity control system, including optical inductor, corresponding each detection zone on each display backlight plate, the practical light sensation value of detection zone of the optical inductor for real-time detection corresponding to it；Circuit control system, the optical inductor are connected to the circuit control system；The circuit control system is used to obtain a reference value for the practical light sensation value variation, and the practical light sensation value is obtained from the optical inductor, and a reference value and practical light sensation value, when the absolute value of the difference of the practical light sensation value and a reference value of a certain detection zone exceeds set threshold value, the circuit control system is used to control the drive condition of LED light in backlight, and the brightness of the detection zone and other detection zones is made to keep uniform.The invention also discloses a kind of control methods of combination brightness uniformity control system.
Description
Technical field
The present invention relates to fields such as combinations, specially a kind of combination brightness uniformity control system and its controlling party
Method.
Background technique
With the continuous development of display technology, the application of display is more come mostly extensively.It is used not only for TV, prison
Visual organ, industry display, medical treatment display, are also more and more applied in public display occasion.It is in public display in application, general
It needs display to have biggish display area, is watched at a distance with meeting people, shows etc. and require compared with large information capacity.But just
The current situation of LCD TV display, conventional size is at 32 cun to 55 cun, if the display of this size range is for public
It has been shown that, then need by the way of multi-screen splicing.
Combination is made of the display screen of muti-piece, and usual display screen is with the structures to form of 3X 3 or more, therefore, is occurred
Luminance difference probability between screen is larger.Especially in combination after lighting use for a long time, due in backlight
The decaying of LED luminance, different brightness of display screen attenuation degrees are different, lead to brightness decay degree difference meeting between different display screens
Gradually amplify, or even will appear the unacceptable luminance difference of human eye.
Currently, most of mosaic screen manufacturers mainly concentrate one's energy to put when leaving the factory, by the being consistent property of brightness of display screen,
And less focus on brightness uniformity control of the joined screen system after working long hours.After working long hours, joined screen system
There is the reason of difference following points in brightness.
1) in entire joined screen system, temperature locating for every a piece of mould group is variant, and the heat that mould group generates can be upward
Gather, causes the module temperature being stacked on the upside of combination higher than the module temperature of downside, different operating temperatures will lead to back
The brightness decay difference of LED light on tabula rasa, as shown in Figure 1, LED light is under different operating environment temperature, brightness declining at any time
Subtract curve, it can be seen that have apparent difference.
2) the batch sex differernce of LED light in backlight, different suppliers LED light aging variation, may result in each
The intrinsic brilliance service life of mould group is variant.As shown in Fig. 2, A, B, C respectively represent the LED of 3 supplier's same packages, it is assembled into
It carries out lighting experiment for a long time after backlight., it is apparent that the LED of different suppliers is under same operating condition, brightness
Attenuation degree at any time also has larger difference.
Summary of the invention
The object of the present invention is to provide a kind of combination brightness uniformity control systems, and photoinduction is added in backlight
Device, the illumination of some position of real time monitoring backlight inside, and then feed back and arrive entire circuit control system, pass through circuit control system
The linkage that system carries out the brightness of all mould groups is adjusted, and after working long hours with realization, remains to preferably guarantee different in combination
Brightness homogeneity between mould group.
Realizing the technical solution of above-mentioned purpose is: a kind of combination brightness uniformity control system, including optical inductor, right
Each detection zone being set on each display backlight plate answered, detection zone of the optical inductor for real-time detection corresponding to it
Practical light sensation value；Circuit control system, the optical inductor are connected to the circuit control system；The circuit control system is used
The practical light sensation is obtained in a reference value of the acquisition for the practical light sensation value variation, and from the optical inductor
Value, and a reference value and practical light sensation value, when practical light sensation value and a reference value of a certain detection zone
The absolute value of difference exceeds set threshold value, and the circuit control system is used to control the drive condition of LED light in backlight, makes this
The brightness of detection zone and other detection zones keeps uniform.
In a preferred embodiment of the present invention, the optical inductor is set in each detection zone the position for not influencing backlight taste
It sets.
In a preferred embodiment of the present invention, the optical inductor is set between LED light and/or the side of light guide plate.
In a preferred embodiment of the present invention, the drive condition of the LED light includes driving current, duty ratio.
Another object of the present invention is: providing the controlling party of combination brightness uniformity control system described in one kind
Method.
Realizing the technical solution of above-mentioned purpose is: the controlling party of combination brightness uniformity control system described in one kind
Method, comprising the following steps: step S1) obtain a reference value changed for comparing practical light sensation value；Step S2) obtain each detection zone
Practical light sensation value；Step S3) calculate the practical light sensation value and a reference value difference absolute value；Step S4) judgement
Whether the absolute value exceeds set threshold value, is brightness adjustment area and enters step S5 if so, defining the detection zone)；If it is not, then
Return step S2)；Step S5) drive condition that controls LED light in the brightness adjustment area, make the brightness adjustment area and other detections
The brightness in area keeps uniform.
In a preferred embodiment of the present invention, the step S1) described in a reference value be each detection zone original state
Under light sensation value or the light sensation value that is defined for circuit control system.
In a preferred embodiment of the present invention, the optical inductor is set in each detection zone the position for not influencing backlight taste
It sets.
In a preferred embodiment of the present invention, the optical inductor is set between LED light and/or the side of light guide plate.
In a preferred embodiment of the present invention, the step S5) described in LED light drive condition include driving current,
Duty ratio.
In a preferred embodiment of the present invention, the step S5) the following steps are included: step S51) adjust the brightness adjustment
In area in the driving current of LED light or other detection zones LED light driving current, make the brightness of the detection zone Yu other detection zones
Keep uniform.
The invention has the advantages that combination brightness uniformity control system of the invention and its control method, improve splicing
Wall in use, after working long hours, in different mould groups backlight LED luminance decay difference and cause combination bright
Spend uneven phenomenon.
Detailed description of the invention
The present invention is further explained with reference to the accompanying drawings and examples.
Fig. 1 is the aging variation schematic diagram that LED light works at different ambient temperatures.
Fig. 2 is brightness decay difference schematic diagram after the same money encapsulation LED of different suppliers works long hours.
Fig. 3 is optical path and distribution schematic diagram in optical simulation software analysis backlight.
Fig. 4 is optical inductor distribution schematic diagram.
Fig. 5 is 1 flow chart of steps of embodiment of the method.
Fig. 6 is 2 flow chart of steps of embodiment of the method.
Wherein,
1 optical inductor；3LED lamp；
4 backlights.
Specific embodiment
The explanation of following embodiment is to can be used to the particular implementation of implementation to illustrate the present invention with reference to additional schema
Example.
Embodiment
As shown in figure 4, a kind of combination brightness uniformity control system, including optical inductor 1, circuit control system.Institute
It states optical inductor 1 and is connected to the circuit control system.
In the present embodiment, the corresponding each detection zone on each display backlight plate 4 of the optical inductor 1.
A detection zone or multiple can be set in the backlight 4 of each display screen.
It should be noted that as shown in figure 3, inside conventional backlight framework, it is found that the illuminance of certain positions
It is only related with the luminous intensity of LED light 3.By can see in the true software in optics side, after optics framework determines, LED light 3
Although the light of sending is turned back by diffuser plate, the multiple of reflector plate, the illuminance of different specific locations can be variant on reflector plate,
But for each fixed position (such as A, B, C), illuminance is constant.Therefore, optical inductor 1 can be arranged some
The position of backlight taste is not influenced.In direct-light type LED backlight framework, can by optical inductor 1 be arranged two LED light 3 it
Between.Such as side entrance back, optical inductor 1 be can be set between LED light 3, also can be set on each side of light guide plate.
Specifically, the practical light sensation value of detection zone of the optical inductor 1 for real-time detection corresponding to it.The circuit
Control system is used to obtain a reference value for the practical light sensation value variation, and obtains institute from the optical inductor 1
Practical light sensation value, and a reference value and practical light sensation value are stated, when the practical light sensation value of a certain detection zone and institute
The absolute value of the difference of a reference value is stated beyond set threshold value, the circuit control system is for controlling LED light 3 in backlight 4
Drive condition makes the brightness of the detection zone and other detection zones keep uniform.The drive condition of the LED light 3 includes driving electricity
Stream, duty ratio.
In the present embodiment, a reference value can choose a value setting from practical light sensation value, or by circuit control
It is set after network analysis processed.It, preferably can be by display screen original state if choosing a value setting from practical light sensation value
Under practical light sensation value as a reference value.
The control method realized based on above-mentioned combination brightness uniformity control system is as follows.
Embodiment of the method
As shown in figure 5, the control method of combination brightness uniformity control system described in one kind, includes the following steps.
Step S1) obtain a reference value changed for comparing practical light sensation value；The step S1) in, a reference value is
Light sensation value under each detection zone original state.
Step S2) obtain the practical light sensation value of each detection zone.
Step S3) calculate the practical light sensation value and a reference value difference absolute value: i.e. by each detection zone
Practical light sensation value and a reference value of the detection zone are calculated and are compared, and going on business for the practical light sensation value and a reference value is obtained
The absolute value of value.
Step S4) judge whether the absolute value exceeds set threshold value, if so, define the detection zone be brightness adjustment area simultaneously
Enter step S5)；If it is not, then return step S2).
Step S5) drive condition that controls LED light 3 in the brightness adjustment area, make the brightness adjustment area and other detection zones
Brightness keep it is uniform.In the step S5) the following steps are included: step S51) adjust the driving of LED light 3 in the brightness adjustment area
The driving current of LED light 3 in electric current or other detection zones makes the brightness of the detection zone and other detection zones keep uniform.
Embodiment of the method 2
As shown in fig. 6, the control method of combination brightness uniformity control system described in one kind, includes the following steps.
Step S1) obtain a reference value changed for comparing practical light sensation value；The step S1) in, a reference value is
The light sensation value that circuit control system defines.
Step S2) obtain the practical light sensation value of each detection zone.
Step S3) calculate the practical light sensation value and a reference value difference absolute value: i.e. by each detection zone
Practical light sensation value and a reference value of the detection zone are calculated and are compared, and going on business for the practical light sensation value and a reference value is obtained
The absolute value of value.
Step S4) judge whether the absolute value exceeds set threshold value, if so, define the detection zone be brightness adjustment area simultaneously
Enter step S5)；If it is not, then return step S2).
Step S5) drive condition that controls LED light 3 in the brightness adjustment area, make the brightness adjustment area and other detection zones
Brightness keep it is uniform.In the step S5) the following steps are included: step S51) adjust the driving of LED light 3 in the brightness adjustment area
The driving current of LED light 3 in electric current or other detection zones makes the brightness of the detection zone and other detection zones keep uniform.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.
Claims (9)
1. a kind of combination brightness uniformity control system, which is characterized in that including
Optical inductor, corresponding each detection zone on each display backlight plate, the optical inductor for real-time detection its
The practical light sensation value of corresponding detection zone；
Circuit control system, the optical inductor are connected to the circuit control system；
The circuit control system is used for
Obtain a reference value, the variation for the practical light sensation value；The a reference value is each display screen original state
Under each detection zone practical light sensation value or the light sensation value that defines of the circuit control system；
The practical light sensation value is obtained from the optical inductor in real time, and
Compare a reference value and practical light sensation value, when the difference of practical the light sensation value and a reference value of a certain detection zone
Absolute value exceed set threshold value, the circuit control system is used to control the drive condition of LED light in backlight, makes the detection
The brightness of area and other detection zones keeps uniform.
2. combination brightness uniformity control system according to claim 1, which is characterized in that the optical inductor setting
The position of backlight taste is not influenced in each detection zone.
3. combination brightness uniformity control system according to claim 2, which is characterized in that the optical inductor setting
Between LED light and/or the side of light guide plate.
4. combination brightness uniformity control system according to claim 1, which is characterized in that the driving of the LED light
Condition includes driving current, duty ratio.
5. the control method of combination brightness uniformity control system according to claim 1, which is characterized in that including with
Lower step:
Step S1) obtain a reference value；
Step S2) the practical light sensation value of each detection zone is obtained in real time；
Step S3) calculate the practical light sensation value and a reference value difference absolute value；
Step S4) judge whether the absolute value exceeds set threshold value, it is brightness adjustment area and enters if so, defines the detection zone
Step S5)；If it is not, then return step S2)；
Step S5) drive condition that controls LED light in the brightness adjustment area, make the brightness in the brightness adjustment area and other detection zones
Keep uniform.
6. the control method of combination brightness uniformity control system according to claim 5, which is characterized in that the light
Inductor is set in each detection zone the position for not influencing backlight taste.
7. the control method of combination brightness uniformity control system according to claim 5, which is characterized in that the light
Inductor is set between LED light and/or the side of light guide plate.
8. the control method of combination brightness uniformity control system according to claim 5, which is characterized in that the step
Rapid S5) described in the drive condition of LED light include driving current, duty ratio.
9. the control method of combination brightness uniformity control system according to claim 8, which is characterized in that the step
Rapid S5) the following steps are included:
Step S51) driving current that adjusts LED light in the driving current of LED light in the brightness adjustment area or other detection zones, make
The brightness of the detection zone and other detection zones keeps uniform.
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| CN201710639387.9A CN107293261B (en) | 2017-07-31 | 2017-07-31 | A kind of combination brightness uniformity control system and its control method |
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| CN107293261B true CN107293261B (en) | 2019-08-13 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110702376B (en) * | 2018-10-12 | 2021-06-01 | 浙江宇视科技有限公司 | Display module troubleshooting method and device |
| CN109238459A (en) * | 2018-11-13 | 2019-01-18 | 惠州西电仲恺人工智能联合创新实验室有限公司 | The online vision detection system of LED luminance |
| CN109637459A (en) * | 2018-11-26 | 2019-04-16 | 惠州市华星光电技术有限公司 | A kind of backlight back light brightness regulating method |
| CN113261046A (en) * | 2019-03-07 | 2021-08-13 | 深圳市柔宇科技股份有限公司 | Display control method, display device and electronic device |
| CN109935219B (en) * | 2019-04-09 | 2020-08-11 | 惠州市华星光电技术有限公司 | Display method of spliced panel |
| CN111128027A (en) * | 2019-12-30 | 2020-05-08 | 上海天马微电子有限公司 | Display module and backlight brightness monitoring method |
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| CN102026003A (en) * | 2010-12-24 | 2011-04-20 | 广东威创视讯科技股份有限公司 | Method and device for correcting colors of multi-screen splicing wall |
| CN102282603A (en) * | 2009-01-20 | 2011-12-14 | 松下电器产业株式会社 | Display apparatus and display control method |
| CN102750931A (en) * | 2012-07-25 | 2012-10-24 | 广东威创视讯科技股份有限公司 | Method and device for adjusting conformity of spliced wall |
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2017
- 2017-07-31 CN CN201710639387.9A patent/CN107293261B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102282603A (en) * | 2009-01-20 | 2011-12-14 | 松下电器产业株式会社 | Display apparatus and display control method |
| CN102026003A (en) * | 2010-12-24 | 2011-04-20 | 广东威创视讯科技股份有限公司 | Method and device for correcting colors of multi-screen splicing wall |
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Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee after: TCL China Star Optoelectronics Technology Co.,Ltd. Address before: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee before: Shenzhen China Star Optoelectronics Technology Co.,Ltd. |