CN105003893B - The method and system of self adaptive control DLED TV backlights - Google Patents
The method and system of self adaptive control DLED TV backlights Download PDFInfo
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- CN105003893B CN105003893B CN201510510744.2A CN201510510744A CN105003893B CN 105003893 B CN105003893 B CN 105003893B CN 201510510744 A CN201510510744 A CN 201510510744A CN 105003893 B CN105003893 B CN 105003893B
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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
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
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- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The present invention discloses a kind of method and system of self adaptive control DLED TV backlights, and method includes：The first temperature value in DLED backlight source module optics cavities is obtained based on the thermal sensor on diffuser plate；Judge whether first temperature value is more than pre-set first temperature threshold；If it is determined that the temperature value is more than pre-set first temperature threshold, then LED array is controlled to reduce sent out colour temperature, and the interval between multiple blast pieces is controlled to reduce.The embodiment of the present invention is when more than temperature threshold, control LED array reduces colour temperature and distributes, so as to reduce the lasting rising of temperature, additionally, due to the gap size between blast piece, it can realize that light source is distributed to LED array makes a series of supplement, reduces in colour temperature, reduces the interval between blast piece, it can realize the supplement effect certain to brightness, reduce the colour temperature variation lacked by LED array.
Description
Technical field
The present invention relates to digital TV technology more particularly to a kind of methods of self adaptive control DLED TV backlights
And television system.
Background technology
According to national broadcast television product quality supervision and inspection center expert introduction, LED light source technology is in LCD TV at present
There are mainly three types of modes for the application in field：Straight-down negative three primary colors RGB-LED light sources, straight-down negative White LED light source and side entering type are white
Color LED light source, relatively more rich for its thickness of side entering type white LED backlight source, price is relatively low；For straight-down negative White LED
(DLED) backlight thickness is thicker, can dynamic control backlight, can increase substantially color representation, design cost also compared with
It is low, there is low-power consumption.Existing DLED backlight source modules framework has more power saving, dissipates due to not having using light guide plate
Heat is simple, picture contrast is more preferable while can accomplish the Micron Technology as side-light type on product thickness, therefore DLED costs
Advantage also highlights gradually.
Fig. 1 shows the structure diagram of the DLED backlight source modules under existing TV, existing DLED backlight source modules
Mainly by LED array and reflector plate (11), diffuser plate (12), diffusion barrier (13) and blast piece (14), blast piece (15), increase
The components such as paillette (16) and outline border assemble, and light source is made of LED and secondary optical lens, is deposited in entire backlight source module
In heat dissipation problem, due to the overstocked promotion that can lead to temperature of optics cavity of the colour temperature caused by LED array below diffuser plate,
And under the influence of LED component is by high temperature, failure or the damage of device can be caused, the service life of entire DLED modules is caused not grown.
Invention content
The technical problem to be solved by the present invention is to cause service life not grown, provide for existing excess temperature damage device
A kind of method and television system of self adaptive control DLED TV backlights by self-adapting detecting temperature change, adjust DLED
LED colour temperatures change in backlight, reduce device loss.
The purpose of the present invention is achieved through the following technical solutions：
The present invention provides a kind of methods of self adaptive control DLED TV backlights, include the following steps：
The first temperature value in DLED backlight source module optics cavities is obtained based on the thermal sensor on diffuser plate；
Judge whether first temperature value is more than pre-set first temperature threshold；
If it is determined that the temperature value is more than pre-set first temperature threshold, then LED array reduction is controlled to be sent out
Colour temperature, and the interval between multiple blast pieces is controlled to reduce.
Interval between the multiple blast pieces of control further includes after reducing：
Second temperature value in DLED backlight source module optics cavities is obtained based on the thermal sensor on diffuser plate；
Judge the second temperature value whether less than pre-set second temperature threshold value；
If it is determined that the temperature value is less than pre-set second temperature threshold value, then LED array increase is controlled to be sent out
Colour temperature.
The control LED array further includes after increasing sent out colour temperature：
The interval between multiple blast pieces is controlled to increase.
The method further includes：
Temperature value in DLED backlight source module optics cavities is obtained based on the thermal sensor on diffuser plate in real time；
Or the time interval based on setting obtains DLED backlight source module optics cavities based on the thermal sensor on diffuser plate
In temperature value；
The temperature value includes the first temperature value and second temperature value.
It is further included after judging that the temperature value is more than pre-set first temperature threshold：
Heat dissipation dynamics in rotating speed increase DLED TVs is increased based on built-in fan.
Correspondingly, the present invention also provides a kind of DLED television systems, including：
Temperature sensor is set on diffuser plate, for obtaining the first temperature value in DLED backlight source module optics cavities；
Threshold value discrimination module, for judging whether first temperature value is more than pre-set first temperature threshold；
Self-adaptive control module, for judging that the temperature value is more than pre-set first temperature in threshold value discrimination module
Threshold value then controls LED array to reduce sent out colour temperature, and the interval between multiple blast pieces is controlled to reduce.
The temperature sensor is additionally operable to obtain the second temperature value in DLED backlight source module optics cavities；
Whether the threshold value discrimination module is additionally operable to judge the second temperature value less than pre-set second temperature threshold
Value；
The self-adaptive control module is additionally operable to judge the temperature value less than pre-set the in threshold value discrimination module
Two temperature thresholds then control LED array to increase sent out colour temperature.
The self-adaptive control module is additionally operable to control the interval between multiple increment pieces to increase.
The temperature sensor is for the temperature value in acquisition DLED backlight source module optics cavities in real time or based on setting
Time interval obtain DLED backlight source module optics cavities in temperature value；The temperature value includes the first temperature value and the second temperature
Angle value.
The DLED television systems further include a fan control module, for judging that the temperature value is more than to pre-set
The first temperature threshold after, increasing rotating speed based on built-in fan increases heat dissipation dynamics in DLED TVs.
Compared with prior art, the embodiment of the present invention is on the diffuser plate of DLED modules by setting a thermal sensor, from
And the temperature value under DLED modules can be tracked at any time, the particularly temperature value in DLED modules where LED array, so as to for
Self adaptive control reaches first-hand information, after temperature value is obtained, judges whether the temperature state of value with temperature threshold has height
Low, when more than temperature threshold, control LED array reduces colour temperature and distributes, so as to reduce the lasting rising of temperature, additionally, due to
Gap size between blast piece can realize that light source is distributed to LED array makes a series of supplement, be reduced in colour temperature,
The interval between blast piece is reduced, can realize the supplement effect certain to brightness, reduces the colour temperature lacked by LED array and becomes
Change.Meanwhile after judging that temperature value reduces, it can also adjust between the color temperature value for increasing LED array and adjusting blast piece
Gap size tunes up the interval between blast piece, increases some heat dissipation channels.In specific implementation process, DLED can be started
Blower module in television system ensures the heat dissipation dynamics in DLED TVs.It is obtained in real time based on the thermal sensor on diffuser plate
Temperature value in DLED backlight source module optics cavities；Or the time interval based on setting obtains based on the thermal sensor on diffuser plate
Take temperature value in DLED backlight source module optics cavities etc., can real-time tracking to the temperature in DLED backlight source module optics cavities
Angle value, so as to timely automated response.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structure diagram of DLED modules of the prior art；
Fig. 2 is the method flow diagram of the self adaptive control DLED TV backlights in the embodiment of the present invention；
Fig. 3 is another flow chart of method of the self adaptive control DLED TV backlights in the embodiment of the present invention；
Fig. 4 is the DLED television system structure diagrams in the embodiment of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained all other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
The method of self adaptive control DLED TV backlights that the embodiment of the present invention is provided, is based primarily upon on diffuser plate
Thermal sensor obtains the first temperature value in DLED backlight source module optics cavities；Judge whether first temperature value is more than advance
First temperature threshold of setting；If it is determined that the temperature value is more than pre-set first temperature threshold, then LED array is controlled
Sent out colour temperature is reduced, and the interval between multiple blast pieces is controlled to reduce.
Specifically, Fig. 2 shows the method flow diagram of the self adaptive control DLED TV backlights in the embodiment of the present invention,
Include the following steps：
S201, the temperature value in DLED backlight source module optics cavities is obtained based on the thermal sensor on diffuser plate；
For the DLED backlight modules shown in Fig. 1, in implementation process, it can be set on diffuser plate in advance
One thermal sensor, so as to get the temperature value in the optics cavity between diffuser plate and LED array device in time.
In entire implementation process, DLED backlight source module optics can be obtained in real time based on the thermal sensor on diffuser plate
Temperature value in chamber；Can also DLED backlight source modules be obtained based on time interval of the thermal sensor on diffuser plate based on setting
Temperature value in optics cavity.So as to ensure the real-time for obtaining temperature information.The setting of time interval can be equispaced
Setting or irregular setting etc..
S202, judge whether the temperature value is more than pre-set temperature threshold, if it exceeds pre-set temperature threshold
Value, then enter S203, otherwise continue S201；
The temperature threshold generally has relationship, usually 90 degree or so with device failure degree or the high temperature values for damaging device,
Bigger to device damage more than this temperature value, which can be more than 80 temperature value, so to ensure in time
Adjust DLED backlights.
S203, control LED array reduce sent out colour temperature, and the interval between multiple blast pieces is controlled to reduce；
When more than temperature threshold, control LED array reduces colour temperature and distributes, so as to reduce the lasting rising of temperature, separately
It outside due to the gap size between blast piece, can realize that light source is distributed to LED array makes a series of supplement, feelings are reduced in colour temperature
Under condition, the interval between blast piece is reduced, the supplement effect certain to brightness can be realized, reduce what is lacked by LED array
Colour temperature changes.
S204, rotating speed is increased based on built-in fan increase heat dissipation dynamics in DLED TVs.
In the case that more than certain temperature threshold, it may be considered that employ the structure setting in television system to be dissipated
Heat increases rotating speed including starting fan system, the temperature Quick diffusing in system is made to go out.
Correspondingly, Fig. 3 shows another stream of method of the self adaptive control DLED TV backlights in the embodiment of the present invention
Cheng Tu includes the following steps：
After the completion of Fig. 2 implementations, corresponding self adaptive control is completed in DLED television systems, is for threshold value temperature
A kind of adjustment in the case that degree is high, and after serial control is carried out, it can also be weakened whole temperature, need to adjust
Light-source brightness control of whole DLED backlight source module etc..
S301, the temperature value in DLED backlight source module optics cavities is obtained based on the thermal sensor on diffuser plate；
In entire implementation process, DLED backlight source module optics can be obtained in real time based on the thermal sensor on diffuser plate
Temperature value in chamber；Can also DLED backlight source modules be obtained based on time interval of the thermal sensor on diffuser plate based on setting
Temperature value in optics cavity.So as to ensure the real-time for obtaining temperature information.The setting of time interval can be equispaced
Setting or irregular setting etc..
S302, whether the second temperature value is judged less than pre-set temperature threshold, if below entering
Otherwise S303 continues S301；
The temperature threshold is generally more related than preferable working environment to device, and the environment temperature for being less than less than 90 degree is come
It says, is allowed for the work appropriateness of DLED backlight source modules, temperature threshold is generally at 90 degree hereinafter, it can be
Less than 90 degree ranges are set, so guarantee adjustment DLED backlights in time.It can with value range 70 degree to 90 degree it
Between.
It should be noted that the temperature threshold in Fig. 2 and Fig. 3 can be identical value, can also be different in value, such as Fig. 2
Temperature threshold can be 88 degree with value, the temperature threshold in Fig. 3 can be 80 degree with value；Temperature threshold that can also be in Fig. 2 and Fig. 3
90 degree of identical value can be taken.Temperature threshold according to needed for actual motion environment come actual setting.
S303, if it is determined that the temperature value be less than pre-set temperature threshold, then control LED array increase sent out
Colour temperature；
Interval increase between S304, the multiple blast pieces of control.
After judging that temperature value reduces, it can also adjust between the color temperature value for increasing LED array and adjusting blast piece
Gap size tunes up the interval between blast piece, increases some heat dissipation channels.
Correspondingly, Fig. 4 also shows the DLED television system structure diagrams in the embodiment of the present invention, which includes：
Temperature sensor is set on diffuser plate, for obtaining the first temperature value in DLED backlight source module optics cavities；
Threshold value discrimination module, for judging whether first temperature value is more than pre-set temperature threshold；
Self-adaptive control module, for judging that the temperature value is more than pre-set temperature threshold in threshold value discrimination module
Value then controls LED array to reduce sent out colour temperature, and the interval between multiple blast pieces is controlled to reduce.
It should be noted that the temperature sensor is additionally operable to obtain the second temperature in DLED backlight source module optics cavities
Value；Whether the threshold value discrimination module is additionally operable to judge the second temperature value less than pre-set temperature threshold；This is adaptive
Control module is additionally operable to judge that the temperature value less than pre-set temperature threshold, then controls LED times in threshold value discrimination module
Row increase sent out colour temperature.The self-adaptive control module is additionally operable to control the interval between multiple increment pieces to increase.
It should be noted that the temperature sensor obtains the temperature in DLED backlight source module optics cavities for acquisition in real time
Value or time interval based on setting obtain the temperature value in DLED backlight source module optics cavities；The temperature value includes first
Temperature value and second temperature value.
It should be noted that the first temperature threshold and second temperature threshold value here can be identical value, can also be different
Value, for example the first temperature threshold can be 88 degree with value, second temperature threshold value can be 80 degree with value；Can also the first temperature threshold and
Second temperature threshold value takes 90 degree of identical value.Temperature threshold according to needed for actual motion environment come actual setting.
It should be noted that the DLED television systems further include a fan control module, for judging the temperature value
After pre-set first temperature threshold, the heat dissipation power in rotating speed increase DLED TVs is increased based on built-in fan
Degree.
Compared with prior art, the embodiment of the present invention is on the diffuser plate of DLED modules by setting a thermal sensor, from
And the temperature value under DLED modules can be tracked at any time, the particularly temperature value in DLED modules where LED array, so as to for
Self adaptive control reaches first-hand information, after temperature value is obtained, judges whether the temperature state of value with temperature threshold has height
Low, when more than temperature threshold, control LED array reduces colour temperature and distributes, so as to reduce the lasting rising of temperature, additionally, due to
Gap size between blast piece can realize that light source is distributed to LED array makes a series of supplement, be reduced in colour temperature,
The interval between blast piece is reduced, can realize the supplement effect certain to brightness, reduces the colour temperature lacked by LED array and becomes
Change.Meanwhile after judging that temperature value reduces, it can also adjust between the color temperature value for increasing LED array and adjusting blast piece
Gap size tunes up the interval between blast piece, increases some heat dissipation channels.In specific implementation process, DLED can be started
Blower module in television system ensures the heat dissipation dynamics in DLED TVs.It is obtained in real time based on the thermal sensor on diffuser plate
Temperature value in DLED backlight source module optics cavities；Or the time interval based on setting obtains based on the thermal sensor on diffuser plate
Take temperature value in DLED backlight source module optics cavities etc., can real-time tracking to the temperature in DLED backlight source module optics cavities
Angle value, so as to timely automated response.
The method and television system of the self adaptive control DLED TV backlights provided above the embodiment of the present invention into
It has gone and has been discussed in detail, specific case used herein is expounded the principle of the present invention and embodiment, implements above
The explanation of example is merely used to help understand the method and its core concept of the present invention；Meanwhile for the general technology people of this field
Member, thought according to the present invention, there will be changes in specific embodiments and applications, in conclusion this explanation
Book content should not be construed as limiting the invention.
Claims (8)
- A kind of 1. method of self adaptive control DLED TV backlights, which is characterized in that include the following steps：The first temperature value in DLED backlight source module optics cavities is obtained based on the thermal sensor on diffuser plate；Judge whether first temperature value is more than pre-set first temperature threshold；If it is determined that the temperature value is more than pre-set first temperature threshold, then LED array is controlled to reduce sent out color Temperature, and the interval between multiple blast pieces is controlled to reduce；Interval between the multiple blast pieces of control further includes after reducing：Second temperature value in DLED backlight source module optics cavities is obtained based on the thermal sensor on diffuser plate；Judge the second temperature value whether less than pre-set second temperature threshold value；If it is determined that the temperature value is less than pre-set second temperature threshold value, then LED array is controlled to increase sent out color Temperature.
- 2. the method for self adaptive control DLED TV backlights as described in claim 1, which is characterized in that the control LED Array further includes after increasing sent out colour temperature：The interval between multiple blast pieces is controlled to increase.
- 3. the method for self adaptive control DLED TV backlights as described in claim 1 or 2, which is characterized in that the side Method further includes：Temperature value in DLED backlight source module optics cavities is obtained based on the thermal sensor on diffuser plate in real time；Or the time interval based on setting is obtained in DLED backlight source module optics cavities based on the thermal sensor on diffuser plate Temperature value；The temperature value includes the first temperature value and second temperature value.
- 4. the method for self adaptive control DLED TV backlights as claimed in claim 3, which is characterized in that judging the temperature Angle value is more than that pre-set first temperature threshold further includes later：Heat dissipation dynamics in rotating speed increase DLED TVs is increased based on built-in fan.
- 5. a kind of DLED television systems, which is characterized in that including：Temperature sensor is set on diffuser plate, for obtaining the first temperature value in DLED backlight source module optics cavities；Threshold value discrimination module, for judging whether first temperature value is more than pre-set first temperature threshold；Self-adaptive control module, for judging that the temperature value is more than pre-set temperature threshold in threshold value discrimination module, then LED array is controlled to reduce sent out colour temperature, and the interval between multiple blast pieces is controlled to reduce；The temperature sensor is additionally operable to obtain the second temperature value in DLED backlight source module optics cavities；Whether the threshold value discrimination module is additionally operable to judge the second temperature value less than pre-set second temperature threshold value；The self-adaptive control module is additionally operable to judge the temperature value less than the pre-set second temperature in threshold value discrimination module Threshold value is spent, then LED array is controlled to increase sent out colour temperature.
- 6. DLED television systems as claimed in claim 5, which is characterized in that it is more that the self-adaptive control module is additionally operable to control Interval increase between a increment piece.
- 7. the DLED television systems as described in claim 5 or 6, which is characterized in that the temperature sensor is used to obtain in real time The temperature value in DLED backlight source module optics cavities or the time interval based on setting is taken to obtain DLED backlight source module optics Temperature value in chamber；The temperature value includes the first temperature value and second temperature value.
- 8. DLED television systems as claimed in claim 7, which is characterized in that the DLED television systems further include a fan control Molding block, for after judging that the temperature value is more than pre-set first temperature threshold, being increased based on built-in fan Rotating speed increases the heat dissipation dynamics in DLED TVs.
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| CN108646445B (en) * | 2018-05-03 | 2021-03-16 | 武汉精测电子集团股份有限公司 | Defect detection device that self-adaptation is shaded |
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| CN1421727A (en) * | 2001-11-30 | 2003-06-04 | 奇美电子股份有限公司 | Multiple-angle reflecting plate for back lighting module |
| JP2004288570A (en) * | 2003-03-25 | 2004-10-14 | Toshiba Corp | Backlight and liquid crystal display device using the same |
| CN101278214A (en) * | 2005-10-04 | 2008-10-01 | 古河电气工业株式会社 | Light reflector and planar light source |
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