CN105003893A - Self-adaption control method and system of DLED TV backlight - Google Patents
Self-adaption control method and system of DLED TV backlight Download PDFInfo
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- CN105003893A CN105003893A CN201510510744.2A CN201510510744A CN105003893A CN 105003893 A CN105003893 A CN 105003893A CN 201510510744 A CN201510510744 A CN 201510510744A CN 105003893 A CN105003893 A CN 105003893A
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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
-
- 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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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a self-adaption control method and system of a DLED TV backlight. The method comprises the following steps: based on a heat sensor on a diffuser plate, obtaining a first temperature value in a DLED backlight module optical cavity; judging whether the first temperature value is beyond a preset first temperature threshold or not; if the temperature value is beyond the preset first temperature threshold, controlling the color temperature generated from LED array reduction, and controlling interval narrowing among a plurality of brightening pieces. According to the embodiment, when the temperature value surpasses the temperature threshold, LED array reduction is controlled and color temperature emission is reduced, so that continuous temperature increase is reduced; and besides, a series of supplements for an LED array emitting light source can be achieved due to the intervals among the brightening pieces; when the color temperature decreases, the intervals among the brightening pieces are decreased, so that a certain supplement effect for light brightness can be achieved, and color temperature change due to LED array deletion is reduced.
Description
Technical field
The present invention relates to digital television techniques field, particularly relate to a kind of method and television system of Self Adaptive Control DLED TV backlight.
Background technology
According to national broadcast television product quality supervision and inspection center expert introduction, current LED light source technology mainly contains three kinds of modes in the application in LCD TV field: straight-down negative three primary colors RGB-LED light source, straight-down negative White LED light source and side entering type White LED light source, more rich for its Thickness Ratio of side entering type white LED backlight source, price is relatively low; Thicker for straight-down negative White LED (DLED) backlight thickness, can Dynamic controlling backlight, can increase substantially color representation, its design cost is also lower, has the features such as low-power consumption.Existing DLED backlight source module framework is not owing to adopting light guide plate, and have more power saving, heat radiation is simple, picture contrast is better, can accomplish the Micron Technology the same with side-light type simultaneously on product thickness, therefore DLED cost advantage also highlights gradually.
Fig. 1 shows the structural representation of the DLED backlight source module under existing TV, existing DLED backlight source module is primarily of LED array and reflector plate (11), diffuser plate (12), diffusion barrier (13) and blast sheet (14), , blast sheet (15), the assembling components such as blast sheet (16) and housing form, its light source is made up of LED and secondary optical lens, heat dissipation problem is there is in whole backlight source module, the overstocked meeting of the optics cavity of colour temperature below diffuser plate produced due to LED array causes the lifting of temperature, and under LED component is subject to temperatures involved, the malfunctioning of device can be caused or damage, cause the life-span of whole DLED module not long.
Summary of the invention
The technical problem to be solved in the present invention is, cause service life not long for existing excess temperature infringement device, provide a kind of method and television system of Self Adaptive Control DLED TV backlight, by self-adapting detecting variations in temperature, regulate LED colour temperature change in DLED backlight, reduce device loss.
Object of the present invention is achieved through the following technical solutions:
The invention provides a kind of method of Self Adaptive Control DLED TV backlight, comprise the steps:
The first temperature value in DLED backlight source module optics cavity is obtained based on the thermal sensor on diffuser plate;
Judge whether described first temperature value exceedes the first temperature threshold pre-set;
If judge that described temperature value exceedes the first temperature threshold pre-set, then control LED array and reduce the colour temperature sent, and the interval controlled between multiple blast sheet reduces.
Also comprise after interval between the multiple blast sheet of described control reduces:
The second temperature value in DLED backlight source module optics cavity is obtained based on the thermal sensor on diffuser plate;
Judge that whether described second temperature value is lower than the second temperature threshold pre-set;
If judge that described temperature value is lower than the second temperature threshold pre-set, then controlling LED array increases the colour temperature sent.
Described control LED array also comprises after increasing the colour temperature sent:
The interval controlled between multiple blast sheet increases.
Described method also comprises:
Based on the temperature value in the thermal sensor Real-time Obtaining DLED backlight source module optics cavity on diffuser plate;
Or based on the thermal sensor on diffuser plate based on the temperature value in the time interval acquisition DLED backlight source module optics cavity arranged;
Described temperature value comprises the first temperature value and the second temperature value.
Judging that described temperature value also comprises after exceeding the first temperature threshold pre-set:
The heat radiation dynamics in rotating speed increase DLED TV is strengthened based on built-in fan.
Accordingly, present invention also offers a kind of DLED television system, comprising:
Temperature sensor, is arranged on diffuser plate, for obtaining the first temperature value in DLED backlight source module optics cavity;
Threshold value discrimination module, for judging whether described first temperature value exceedes the first temperature threshold pre-set;
Self-adaptive control module, for judging that at threshold value discrimination module described temperature value exceedes the first temperature threshold pre-set, then controls LED array and reduce the colour temperature sent, and the interval controlled between multiple blast sheet reduces.
Described temperature sensor is also for obtaining the second temperature value in DLED backlight source module optics cavity;
Described threshold value discrimination module is also for judging that whether described second temperature value is lower than the second temperature threshold pre-set;
Described self-adaptive control module is also for judging that at threshold value discrimination module described temperature value is lower than the second temperature threshold pre-set, then controlling LED array increases the colour temperature sent.
Described self-adaptive control module also increases for the interval controlled between multiple increment sheet.
Described temperature sensor is used for the temperature value in Real-time Obtaining DLED backlight source module optics cavity, or obtains the temperature value in DLED backlight source module optics cavity based on the time interval arranged; Described temperature value comprises the first temperature value and the second temperature value.
Described DLED television system also comprises a fan control module, for after judging that described temperature value exceedes the first temperature threshold pre-set, strengthens the heat radiation dynamics in rotating speed increase DLED TV based on built-in fan.
Compared with prior art, the embodiment of the present invention by arranging a thermal sensor on the diffuser plate of DLED module, thus the temperature value that can track at any time under DLED module, the particularly temperature value at LED array place in DLED module, thus reach first-hand information for Self Adaptive Control, after acquisition temperature value, judge whether this temperature value state has height with temperature threshold, when exceeding temperature threshold, control LED array minimizing colour temperature to distribute, thus decrease the lasting rising of temperature, in addition due to the gap size between blast sheet, can realize that light source is distributed to LED array and make a series of supplementing, in colour temperature reduction situation, reduce the interval between blast sheet, the supplementary effect certain to brightness can be realized, decrease the colour temperature change because of LED array disappearance.Meanwhile, after judging that temperature value reduces, also can regulate the color temperature value increasing LED array, and regulate the gap size between blast sheet, the interval between blast sheet be tuned up, increases some heat dissipation channels.In specific implementation process, the blower module in DLED television system can be started, ensure the heat radiation dynamics in DLED TV.Based on the temperature value in the thermal sensor Real-time Obtaining DLED backlight source module optics cavity on diffuser plate; Or the temperature value etc. obtained based on the time interval arranged based on the thermal sensor on diffuser plate in DLED backlight source module optics cavity, can real-time tracking to the temperature value in DLED backlight source module optics cavity, thus automated response in time.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of DLED module of the prior art;
Fig. 2 is the method flow diagram of the Self Adaptive Control DLED TV backlight in the embodiment of the present invention;
Fig. 3 is another flow chart of method of the Self Adaptive Control DLED TV backlight in the embodiment of the present invention;
Fig. 4 is the DLED television system structural representation in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
The method of the Self Adaptive Control DLED TV backlight that the embodiment of the present invention provides, mainly obtains the first temperature value in DLED backlight source module optics cavity based on the thermal sensor on diffuser plate; Judge whether described first temperature value exceedes the first temperature threshold pre-set; If judge that described temperature value exceedes the first temperature threshold pre-set, then control LED array and reduce the colour temperature sent, and the interval controlled between multiple blast sheet reduces.
Concrete, Fig. 2 shows the method flow diagram of the Self Adaptive Control DLED TV backlight in the embodiment of the present invention, comprises the steps:
S201, obtain the temperature value in DLED backlight source module optics cavity based on the thermal sensor on diffuser plate;
For the DLED backlight module shown in Fig. 1, in implementation process, a thermal sensor can be set on diffuser plate in advance, thus the temperature value in the optics cavity between diffuser plate and LED array device can be got in time.
In whole implementation process, can based on the temperature value in the thermal sensor Real-time Obtaining DLED backlight source module optics cavity on diffuser plate; Also can based on the thermal sensor on diffuser plate based on the temperature value in the time interval acquisition DLED backlight source module optics cavity arranged.Thus ensure to the real-time obtaining temperature information.The setting in the time interval, can be that equispaced is arranged, also can be irregular setting etc.
S202, judge whether this temperature value exceedes the temperature threshold pre-set, if exceed the temperature threshold pre-set, then enter into S203, otherwise continue S201;
General and the device failure degree of this temperature threshold or the high temperature values damaging device have relation, it is generally about 90 degree, exceed this temperature value comparatively large to device damage ratio, this temperature threshold can be the temperature value of more than 80, and so guarantee adjusts DLED backlight in time.
S203, control LED array reduce the colour temperature sent, and the interval controlled between multiple blast sheet reduces;
When exceeding temperature threshold, control LED array minimizing colour temperature to distribute, thus decrease the lasting rising of temperature, in addition due to the gap size between blast sheet, can realize that light source is distributed to LED array and make a series of supplementing, in colour temperature reduction situation, reduce the interval between blast sheet, the supplementary effect certain to brightness can be realized, decrease the colour temperature change because of LED array disappearance.
S204, to strengthen rotating speed based on built-in fan and increase heat radiation dynamics in DLED TV.
Exceeding in certain temperature threshold situation, can consider that the vibrational power flow employed in television system dispels the heat, comprising and start fan system to increase rotating speed, intrasystem temperature Quick diffusing is gone out.
Accordingly, Fig. 3 shows another flow chart of method of the Self Adaptive Control DLED TV backlight in the embodiment of the present invention, comprises the steps:
After Fig. 2 has implemented, corresponding Self Adaptive Control is completed in DLED television system, one adjustment when it is high for threshold temperature, and after carrying out series and controlling, also overall temperature can be made to weaken to some extent, need the light-source brightness adjusting whole DLED backlight source module to control etc.
S301, obtain the temperature value in DLED backlight source module optics cavity based on the thermal sensor on diffuser plate;
In whole implementation process, can based on the temperature value in the thermal sensor Real-time Obtaining DLED backlight source module optics cavity on diffuser plate; Also can based on the thermal sensor on diffuser plate based on the temperature value in the time interval acquisition DLED backlight source module optics cavity arranged.Thus ensure to the real-time obtaining temperature information.The setting in the time interval, can be that equispaced is arranged, also can be irregular setting etc.
S302, judge that whether described second temperature value is lower than the temperature threshold pre-set, if lower than, enter into S303, otherwise continue S301;
Generally preferably working environment is relevant to device ratio for this temperature threshold, for lower than the environment temperature of less than 90 degree, allow its appropriateness of work concerning DLED backlight source module, its temperature threshold is generally below 90 degree, it can be arrange lower than 90 degree of scopes, and so guarantee adjusts DLED backlight in time.It can span between 70 degree to 90 degree.
It should be noted that, the temperature threshold in Fig. 2 and Fig. 3 can be identical value, also can different value, and the temperature threshold in such as Fig. 2 can value 88 degree, and the temperature threshold in Fig. 3 can value 80 degree; Also identical value 90 degree can be got by the temperature threshold in Fig. 2 and Fig. 3.According to actual motion environment is next actual, required temperature threshold is set.
If S303 judges that described temperature value is lower than the temperature threshold pre-set, then controlling LED array increases the colour temperature sent;
S304, the interval controlled between multiple blast sheet increase.
After judging that temperature value reduces, also can regulate the color temperature value increasing LED array, and regulate the gap size between blast sheet, the interval between blast sheet be tuned up, increases some heat dissipation channels.
Accordingly, Fig. 4 also show the DLED television system structural representation in the embodiment of the present invention, and this system comprises:
Temperature sensor, is arranged on diffuser plate, for obtaining the first temperature value in DLED backlight source module optics cavity;
Threshold value discrimination module, for judging whether described first temperature value exceedes the temperature threshold pre-set;
Self-adaptive control module, for judging that described temperature value exceedes the temperature threshold pre-set at threshold value discrimination module, then controls LED array and reduce the colour temperature sent, and the interval controlled between multiple blast sheet reduces.
It should be noted that, this temperature sensor is also for obtaining the second temperature value in DLED backlight source module optics cavity; This threshold value discrimination module is also for judging that whether described second temperature value is lower than the temperature threshold pre-set; This self-adaptive control module is also for judging that at threshold value discrimination module described temperature value is lower than the temperature threshold pre-set, then controlling LED array increases the colour temperature sent.This self-adaptive control module also increases for the interval controlled between multiple increment sheet.
It should be noted that, this temperature sensor is used for the temperature value in Real-time Obtaining acquisition DLED backlight source module optics cavity, or obtains the temperature value in DLED backlight source module optics cavity based on the time interval arranged; This temperature value comprises the first temperature value and the second temperature value.
It should be noted that, the first temperature threshold here and the second temperature threshold can be identical values, also can different value, and such as the first temperature threshold can value 88 degree, and the second temperature threshold can value 80 degree; Also the first temperature threshold and the second temperature threshold identical value 90 degree can be got.According to actual motion environment is next actual, required temperature threshold is set.
It should be noted that, this DLED television system also comprises a fan control module, for after judging that described temperature value exceedes the first temperature threshold pre-set, strengthens the heat radiation dynamics in rotating speed increase DLED TV based on built-in fan.
Compared with prior art, the embodiment of the present invention by arranging a thermal sensor on the diffuser plate of DLED module, thus the temperature value that can track at any time under DLED module, the particularly temperature value at LED array place in DLED module, thus reach first-hand information for Self Adaptive Control, after acquisition temperature value, judge whether this temperature value state has height with temperature threshold, when exceeding temperature threshold, control LED array minimizing colour temperature to distribute, thus decrease the lasting rising of temperature, in addition due to the gap size between blast sheet, can realize that light source is distributed to LED array and make a series of supplementing, in colour temperature reduction situation, reduce the interval between blast sheet, the supplementary effect certain to brightness can be realized, decrease the colour temperature change because of LED array disappearance.Meanwhile, after judging that temperature value reduces, also can regulate the color temperature value increasing LED array, and regulate the gap size between blast sheet, the interval between blast sheet be tuned up, increases some heat dissipation channels.In specific implementation process, the blower module in DLED television system can be started, ensure the heat radiation dynamics in DLED TV.Based on the temperature value in the thermal sensor Real-time Obtaining DLED backlight source module optics cavity on diffuser plate; Or the temperature value etc. obtained based on the time interval arranged based on the thermal sensor on diffuser plate in DLED backlight source module optics cavity, can real-time tracking to the temperature value in DLED backlight source module optics cavity, thus automated response in time.
Above the method for the Self Adaptive Control DLED TV backlight that the embodiment of the present invention provides and television system are described in detail, apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. a method for Self Adaptive Control DLED TV backlight, is characterized in that, comprises the steps:
The first temperature value in DLED backlight source module optics cavity is obtained based on the thermal sensor on diffuser plate;
Judge whether described first temperature value exceedes the first temperature threshold pre-set;
If judge that described temperature value exceedes the first temperature threshold pre-set, then control LED array and reduce the colour temperature sent, and the interval controlled between multiple blast sheet reduces.
2. the method for Self Adaptive Control DLED TV backlight as claimed in claim 1, is characterized in that, also comprise after the interval between the multiple blast sheet of described control reduces:
The second temperature value in DLED backlight source module optics cavity is obtained based on the thermal sensor on diffuser plate;
Judge that whether described second temperature value is lower than the second temperature threshold pre-set;
If judge that described temperature value is lower than the second temperature threshold pre-set, then controlling LED array increases the colour temperature sent.
3. the method for Self Adaptive Control DLED TV backlight as claimed in claim 2, it is characterized in that, described control LED array also comprises after increasing the colour temperature sent:
The interval controlled between multiple blast sheet increases.
4. the method for the Self Adaptive Control DLED TV backlight as described in any one of claims 1 to 3, it is characterized in that, described method also comprises:
Based on the temperature value in the thermal sensor Real-time Obtaining DLED backlight source module optics cavity on diffuser plate;
Or based on the thermal sensor on diffuser plate based on the temperature value in the time interval acquisition DLED backlight source module optics cavity arranged;
Described temperature value comprises the first temperature value and the second temperature value.
5. the method for Self Adaptive Control DLED TV backlight as claimed in claim 4, is characterized in that, judging that described temperature value also comprises after exceeding the first temperature threshold pre-set:
The heat radiation dynamics in rotating speed increase DLED TV is strengthened based on built-in fan.
6. a DLED television system, is characterized in that, comprising:
Temperature sensor, is arranged on diffuser plate, for obtaining the first temperature value in DLED backlight source module optics cavity;
Threshold value discrimination module, for judging whether described first temperature value exceedes the first temperature threshold pre-set;
Self-adaptive control module, for judging that described temperature value exceedes the temperature threshold pre-set at threshold value discrimination module, then controls LED array and reduce the colour temperature sent, and the interval controlled between multiple blast sheet reduces.
7. DLED television system as claimed in claim 6, is characterized in that,
Described temperature sensor is also for obtaining the second temperature value in DLED backlight source module optics cavity;
Described threshold value discrimination module is also for judging that whether described second temperature value is lower than the second temperature threshold pre-set;
Described self-adaptive control module is also for judging that at threshold value discrimination module described temperature value is lower than the second temperature threshold pre-set, then controlling LED array increases the colour temperature sent.
8. DLED television system as claimed in claim 7, is characterized in that, described self-adaptive control module also increases for the interval controlled between multiple increment sheet.
9. the DLED television system as described in any one of claim 6 to 8, it is characterized in that, described temperature sensor is used for the temperature value in Real-time Obtaining DLED backlight source module optics cavity, or obtains the temperature value in DLED backlight source module optics cavity based on the time interval arranged; Described temperature value comprises the first temperature value and the second temperature value.
10. DLED television system as claimed in claim 9, it is characterized in that, described DLED television system also comprises a fan control module, for after judging that described temperature value exceedes the first temperature threshold pre-set, strengthen the heat radiation dynamics in rotating speed increase DLED TV based on built-in fan.
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| CN201510510744.2A CN105003893B (en) | 2015-08-19 | 2015-08-19 | The method and system of self adaptive control DLED TV backlights |
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| CN201510510744.2A CN105003893B (en) | 2015-08-19 | 2015-08-19 | The method and system of self adaptive control DLED TV backlights |
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| CN105003893B (en) | 2018-06-19 |
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