CN111045281A - Brightness attenuation compensation method, device, laser projector and storage medium - Google Patents
Brightness attenuation compensation method, device, laser projector and storage medium Download PDFInfo
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- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
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- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
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Abstract
The invention provides a brightness attenuation compensation method, a brightness attenuation compensation device, a laser projector and a storage medium. The invention can reasonably and conveniently keep the projector with ideal brightness for a long time, improve the projection effect and reduce the maintenance and debugging cost.
Description
Technical Field
The present invention relates to a projection technology method, and more particularly, to a method and an apparatus for compensating for luminance attenuation, a laser projector, and a storage medium.
Background
For the laser projector, the conversion efficiency of the light source is in a bottleneck state at present, and the stream brightness of the laser projector can only be solved by increasing the number of the light sources. Under the condition that the number of the light sources is increased and the conversion efficiency is not remarkably improved, the brightness attenuation speed is higher, and the requirement on the heat dissipation performance of the machine is higher. Therefore, in a high lumen laser projector, after a certain period of use, some maintenance treatments such as dust removal and adjustment of light source parts are required for the projector. If according to scheme before, the inside dust of simple clearance board, though can effectively improve luminance, loaded down with trivial details clearance process, complicated dismouting machine step consume a large amount of manpower and materials to can make user experience extremely bad, even be unacceptable in some complicated installation environment, directly influence laser projector's marketing.
At present, a common method for improving the conversion efficiency of a light source is to control the output of a laser by adjusting the PWM in a main controller and adjust the brightness and color output of a laser projector according to different use conditions to achieve the best effect, but this method usually needs to periodically send special personnel for maintenance and needs professional personnel to investigate the actual use environment, so that the technical requirements on installation and debugging personnel are high, and a large amount of manpower and material resources are consumed.
Therefore, there is a need for a laser projector that can improve the conversion efficiency of the light source in an accurate and convenient manner and ensure that the laser projector can maintain a desired brightness after a long period of use.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a method and an apparatus for compensating brightness attenuation, a laser projector and a storage medium, which are used to solve the problem that the conventional laser projector cannot accurately and conveniently maintain the brightness or conversion efficiency of the light source after long-term use.
To achieve the above and other related objects, the present invention provides a brightness attenuation compensation method for a laser projection apparatus, including: acquiring the accumulated use time of the equipment and the use time of the equipment; obtaining a reference PWM value according to the use time of the previous time; and adjusting the reference PWM value according to the current service time to obtain a real-time PWM value so as to control the real-time output brightness of the equipment.
In an embodiment of the invention, the method for obtaining the reference PWM value by using the historical time includes: carrying out time judgment operation on a preset initial output current value to obtain a plurality of output current values and service time sections matched with the output current values one by one; and converting the initial output current value into a corresponding initial PWM value, and performing PWM current control operation on the initial PWM value to obtain the reference PWM values corresponding to the use time sections one to one.
In an embodiment of the present invention, the time determination method includes: y ═ x (1+ n%); wherein y is the output current value, x is the initial output current value, and n is an operation coefficient corresponding to different use time sections; presetting a plurality of sequentially increasing service time nodes, forming a service time section by two adjacent service time nodes, and enabling each service time section to correspond to the output current value one by one; and adjusting the use time sections according to the brightness attenuation characteristic of the equipment, so that the output current value matched with each use time section after adjustment meets the actual current output requirement.
In an embodiment of the invention, the output current value is a root mean square value of the output current.
In an embodiment of the present invention, the PWM current control operation is: y is X- (1024-X) n%; wherein Y is the reference PWM value, X is the initial PWM value, and n is an operation coefficient corresponding to different use time sections; and obtaining the reference PWM value corresponding to each use time section one to one according to each use time section.
In one embodiment of the present invention, the PWM values are a set of PWM signal values comprising R, G, B and Y four color correspondences.
In an embodiment of the present invention, the method for adjusting the reference PWM value according to the current usage time to obtain the real-time PWM value includes: presetting a time threshold and comparing the time threshold with the current use time; when the current using time is smaller than the time threshold, the real-time PWM value is decreased progressively along with the increase of time according to a certain linear relation on the basis of the reference PWM value until the current using time is equal to the time threshold; and when the current using time is more than or equal to the time threshold, the real-time PWM value is constantly reduced by a fixed value on the basis of the reference PWM value.
To achieve the above and other related objects, the present invention provides a luminance degradation compensation apparatus, comprising: the timing module is used for acquiring the accumulated use time of the equipment and the use time of the equipment; and the processing module is used for obtaining a reference PWM value according to the previous service time and adjusting the reference PWM value according to the current service time to obtain a real-time PWM value so as to control the real-time output brightness of the equipment.
To achieve the above and other related objects, the present invention provides a laser projector, comprising: a processor, and a memory; the memory is used for storing a computer program, and the processor is used for implementing the brightness attenuation compensation method when executing the computer program stored in the memory.
To achieve the above and other related objects, the present invention provides a computer-readable storage medium having stored thereon a computer program, which, when executed by a processor, implements the brightness decay compensation method described above.
As described above, according to the brightness attenuation compensation method, the brightness attenuation compensation device, the laser projector, and the storage medium of the present invention, the real-time PWM value is obtained by obtaining the previous use time and the current use time accumulated by the device, obtaining the reference PWM value according to the previous use time and adjusting the reference PWM value according to the current use time, so as to control the real-time output brightness of the device. The following beneficial effects are achieved:
the projector can accurately and conveniently keep ideal brightness for a long time, the projection effect is improved, and the maintenance and debugging cost is reduced.
Drawings
Fig. 1 is a schematic flow chart of a luminance degradation compensation method according to an embodiment of the present invention;
FIG. 2 is a block diagram of a luminance degradation compensation apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a laser projector according to an embodiment of the present invention;
description of the element reference numerals
Method steps S101 to S103
201 timing module
202 processing module
301 processor
302 memory
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
As shown in fig. 1, a flow chart of a luminance degradation compensation method in an embodiment of the present invention is shown, where the method includes:
step S101: and acquiring the accumulated use time of the equipment and the use time of the equipment.
In an embodiment of the present invention, the previous usage time and the current usage time may be obtained by a software or hardware timer. The previous use time refers to the time from the time when the equipment is used from factory to the present time, and the present use time refers to the present use time.
Step S102: and obtaining a reference PWM value according to the historical use time.
In an embodiment of the present invention, the method for obtaining the reference PWM value by using the historical time includes two steps, a first step: and carrying out time judgment operation on the preset initial output current value to obtain a plurality of output current values and service time sections matched with the output current values one by one.
In an embodiment of the invention, the initial output current value is an output current used by the apparatus for the first time.
In an embodiment of the present invention, the time determination method includes: y ═ x (1+ n%); wherein y is the output current value, x is the initial output current value, and n is an operation coefficient corresponding to different use time sections; presetting a plurality of sequentially increasing service time nodes, forming a service time section by two adjacent service time nodes, and enabling each service time section to correspond to the output current value one by one; and adjusting the use time sections according to the brightness attenuation characteristic of the equipment, so that the output current value matched with each use time section after adjustment meets the actual current output requirement.
First, an initial output current value is preset, and a plurality of output current values in a linear relationship are obtained through a formula y ═ x (1+ n%). Wherein n is more than or equal to 0 and is an integer.
For example, an initial output current value is preset to be 3A, and n is set to 0 by default; when the next output current value n is 1, the next output current value is 3.03A, and a plurality of values which belong to the range of normal output current such as 3.06A, 3.09A, 3.12A, 3.15A, 3.18A, 3.21A and the like are obtained respectively by the analogy.
In an embodiment of the present invention, the values of the output current values of the plurality of linear relationships may be obtained by combining experience of professional adjustment of the luminance and color output of the projector, or by calculating an output current required for commonly adjusting luminance according to luminance attenuation characteristics of the device, and matching a certain range of usage time by spacing a certain value.
Secondly, a plurality of using time nodes are preset, and two adjacent using time nodes form the using time section.
Similarly, the setting of the plurality of usage time nodes may also be combined with experience of professional adjustment of the luminance and color output of the projector, or may have a preliminary output current value to give a usage time interval in an approximate range according to the luminance attenuation characteristic of the device.
For example, the default T1-T7 use time nodes as: 1000H, 1100H, 1200H, 1300H, 1400H, 15001600H, H being expressed as hours.
The selection of the use time node can be preliminarily set through experimental data, use experience or product brightness attenuation characteristics. For example, when the device usage time reaches 1000 hours, the brightness decay starts to increase significantly, the projection effect starts to decrease significantly, and the like.
By presetting a plurality of usage time nodes, a plurality of usage time segments are formed. Such as 0-T1, T1-T2, T2-T3, T3-T4, T4-T5, T5-T6, T6-T7.
And thirdly, corresponding each use time section to the output current value one by one.
In an embodiment of the present invention, the matching is performed according to the sequentially increasing feature. In combination with the above example, then 3A may correspond to 0-T1,3.06A may correspond to T1-T2, 3.09A may correspond to T2-T3, and so on.
And finally, adjusting the use time sections according to the brightness attenuation characteristic of the equipment, so that the output current value matched with each use time section after adjustment meets the actual current output requirement.
In an embodiment of the present invention, after obtaining a matching relationship between a preliminary output current value and a usage time segment, a time node is fine-tuned through multiple aging experiments and by combining with a luminance attenuation characteristic of a device, so that the output current value matched with each of the usage time segments after adjustment meets an actual current output requirement.
For example, the trimmed T1-T7 are: 1020H, 1130H, 1240H, 1390H, 1570H, 1780H, 1950H.
In an embodiment of the invention, the output current value is a root mean square value of the output current. The rms value of the output current is also called the effective value and is calculated by first squaring, then averaging, and then squaring. Because the output voltage is controlled by adopting a PWM (pulse width modulation) mode, the actual output voltage in a period has a certain duty ratio, and therefore, the effective output voltage or the effective output current can be calculated by using a root mean square calculation mode.
In an embodiment of the invention, the range of the initial output current value and the range of the plurality of output current values are within a normal range.
In an embodiment of the present invention, the first step process mainly obtains a plurality of usage time segments through a plurality of typical output current values, and aims to achieve reasonable and scientific brightness adjustment of the device by respectively processing usage time of different times and tightly according to the relevant brightness attenuation characteristics of the device.
The second step is that: and converting the initial output current value into a corresponding initial PWM value, and performing PWM current control operation on the initial PWM value to obtain the reference PWM values corresponding to the use time sections one to one.
In an embodiment of the present invention, the PWM values are a set of PWM signal values corresponding to R, G, B and Y four colors.
In an embodiment of the invention, the laser projector mainly mixes the colors of the light after the light is rotated at a high speed by the color wheel. And finally transmitted out through the prism to form the desired imaging effect. The PWM signal values corresponding to R, G, B and the four Y colors are obtained by adjusting the proportional relationship between R, G, B and the four Y colors in the color wheel to achieve brightness compensation and ensure the projection effect.
In an embodiment of the invention, when the initial output current value is converted into the corresponding initial PWM value, and the associated PWM value of the image at the time is recorded, if the PWM value includes R, G, B and the PWM signal values corresponding to the four colors Y, the initial output current is 3A, and the corresponding PWM value is (740610580650).
In an embodiment of the present invention, the PWM current control operation is: y is X- (1024-X) n%; wherein Y is the reference PWM value, X is the initial PWM value, and n is an operation coefficient corresponding to different use time sections; and obtaining the reference PWM value corresponding to each use time section one to one according to each use time section.
In an embodiment of the present invention, the formula Y ═ X- (1024-X) × n%, where n is greater than or equal to 0, n is an integer, and X is only an initial PWM value, and the output current values of other service times are not subjected to the processing of PWM value conversion. I.e. Y is independent of other output current values and only dependent on different time segments of use.
In an embodiment of the invention, the reference PWM values corresponding to the respective active time segments one to one can be obtained by setting an operation coefficient n.
For example, when the usage time period is 0-T1, n is 0 by default, Y ═ X, i.e., the reference PWM value is the initial PWM value; when the usage time zone is T1-T2, n is 1, Y is X- (1024-X) × 1%, and so on.
According to the usage time zones composed of T1-T7, the usage time is longer and shorter, and the reference PWM values corresponding to the usage time zones are calculated to be smaller and smaller.
In an embodiment of the invention, the inverter is adopted to adjust the relationship between the PWM value and the output current value, and the PWM value and the output current value are in inverse proportion, namely, when the PWM value is smaller, the output current is larger, and the projection brightness is higher, so that more reasonable and convenient brightness compensation is realized.
Step S103: and adjusting the reference PWM value according to the current service time to obtain a real-time PWM value so as to control the real-time output brightness of the equipment.
In an embodiment of the present invention, step S102 mainly performs relatively long-term and macroscopic adjustment on the previous usage time, and step S103 mainly performs relatively short-term and microscopic adjustment on the current usage time, so as to implement more comprehensive and scientific brightness compensation on the device.
In an embodiment of the present invention, the method for adjusting the reference PWM value according to the current usage time to obtain the real-time PWM value includes: presetting a time threshold and comparing the time threshold with the current use time; when the current using time is smaller than the time threshold, the real-time PWM value is decreased progressively along with the increase of time according to a certain linear relation on the basis of the reference PWM value until the current using time is equal to the time threshold; and when the current using time is more than or equal to the time threshold, the real-time PWM value is constantly reduced by a fixed value on the basis of the reference PWM value.
In an embodiment of the invention, the real-time PWM value is obtained by adjusting the reference PWM value according to the current usage time, and the adjusting method in this step is calculated mainly according to brightness attenuation characteristics of the device in a short time and temperature influence of the device due to heat generation.
For example, if the time threshold is 30 minutes and the fixed value is 10, the real-time PWM value is:
t<30min，Y＝Y1–t/3；
t>＝30min，Y＝Y1-10；
wherein, Y1 is the reference PWM value, and Y is the real-time PWM value.
By converting the method for adjusting the reference PWM value according to the current use time into a formula, we can see that if the time threshold is 30 minutes, the real-time PWM value is continuously reduced on the basis of the reference PWM value within the current use time of 30 minutes, so that the output current is continuously increased to improve the brightness.
When the time exceeds 30 minutes, the brightness attenuation curve is slowly reduced in a relatively long period of time according to the brightness attenuation characteristic of the equipment, so that the real-time PWM value is kept unchanged on the current basis.
In summary, the brightness attenuation compensation method of the present invention strictly depends on the brightness attenuation characteristics, and provides the specific brightness compensation for the device in consideration of long-term and short-term comprehensive consideration, so as to ensure that the projector keeps high brightness operation for a longer time, so as to improve the projection effect, and reduce the maintenance and debugging cost.
Fig. 2 is a block diagram of a luminance degradation compensation apparatus according to an embodiment of the present invention. The device comprises: a timing module 201 and a processing module 202.
The timing module 201 is configured to obtain the previous usage time accumulated by the device and the current usage time.
In an embodiment of the present invention, the timing module 201 may be a timer, and the timer may be implemented by software, such as a timing function, or a hardware timer.
And the processing module 202 is configured to obtain a reference PWM value according to the previous usage time, and adjust the reference PWM value according to the current usage time to obtain a real-time PWM value, so as to control the real-time output brightness of the device.
In an embodiment of the present invention, the PWM values are a set of PWM signal values corresponding to R, G, B and Y four colors.
In an embodiment of the invention, the laser projector mainly mixes the colors of the light after the light is rotated at a high speed by the color wheel. And finally transmitted out through the prism to form the desired imaging effect. The PWM signal values corresponding to R, G, B and the four Y colors are obtained by adjusting the proportional relationship between R, G, B and the four Y colors in the color wheel to achieve brightness compensation and ensure the projection effect.
It should be noted that the division of the modules of the above apparatus is only a logical division, and the actual implementation may be wholly or partially integrated into one physical entity, or may be physically separated. And these modules can be realized in the form of software called by processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of calling software by the processing element, and part of the modules can be realized in the form of hardware. For example, the processing module 202 may be a separate processing element, or may be integrated into a chip of the apparatus, or may be stored in a memory of the apparatus in the form of program code, and a processing element of the apparatus calls and executes the functions of the processing module 202. Other modules are implemented similarly. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.
For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), among others. For another example, when one of the above modules is implemented in the form of a Processing element scheduler code, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
As shown in fig. 3, a schematic structural diagram of a laser projector in the embodiment of the present invention is shown, including: a processor 301, and a memory 302; the memory is used for storing a computer program, and the processor is used for implementing the brightness attenuation compensation method as shown in fig. 1 when the computer program stored in the memory is executed.
The Processor 301 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component.
The Memory 302 may include a Random Access Memory (RAM), and may further include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory.
In an embodiment of the present invention, a computer-readable storage medium is provided, on which a computer program is stored, which when executed by a processor implements the brightness decay compensation method as described in fig. 1.
The computer-readable storage medium, as will be appreciated by one of ordinary skill in the art: all or part of the steps for implementing the above method embodiments may be performed by hardware associated with a computer program. The aforementioned computer program may be stored in a computer readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A brightness attenuation compensation method is applied to a laser projection device and comprises the following steps:
acquiring the accumulated use time of the equipment and the use time of the equipment;
obtaining a reference PWM value according to the use time of the previous time;
and adjusting the reference PWM value according to the current service time to obtain a real-time PWM value so as to control the real-time output brightness of the equipment.
2. The brightness decay compensation method according to claim 1, wherein the method for obtaining the reference PWM value using the historical usage time comprises:
carrying out time judgment operation on a preset initial output current value to obtain a plurality of output current values and service time sections matched with the output current values one by one;
and converting the initial output current value into a corresponding initial PWM value, and performing PWM current control operation on the initial PWM value to obtain the reference PWM values corresponding to the use time sections one to one.
3. The luminance fading compensation method as claimed in claim 2, wherein the time judgment operation method comprises:
y＝x*(1+n％)；
wherein y is the output current value, x is the initial output current value, and n is an operation coefficient corresponding to different use time sections;
presetting a plurality of sequentially increasing service time nodes, forming a service time section by two adjacent service time nodes, and enabling each service time section to correspond to the output current value one by one;
and adjusting the use time sections according to the brightness attenuation characteristic of the equipment, so that the output current value matched with each use time section after adjustment meets the actual current output requirement.
4. The luminance decay compensation method according to claim 2 or 3, wherein the output current value is a root mean square value of the output current.
5. The brightness decay compensation method according to claim 2, wherein the PWM current control operation is:
Y＝X-(1024-X)*n％；
wherein Y is the reference PWM value, X is the initial PWM value, and n is an operation coefficient corresponding to different use time sections;
and obtaining the reference PWM value corresponding to each use time section one to one according to each use time section.
6. The method of claim 2 or 5, wherein the PWM values are a set of PWM signal values comprising R, G, B and Y four color correspondences.
7. The brightness decay compensation method according to claim 1, wherein the method for adjusting the reference PWM value to obtain the real-time PWM value according to the current usage time comprises:
presetting a time threshold and comparing the time threshold with the current use time;
when the current using time is smaller than the time threshold, the real-time PWM value is decreased progressively along with the increase of time according to a certain linear relation on the basis of the reference PWM value until the current using time is equal to the time threshold;
and when the current using time is more than or equal to the time threshold, the real-time PWM value is constantly reduced by a fixed value on the basis of the reference PWM value.
8. A luminance degradation compensation apparatus, comprising:
the timing module is used for acquiring the accumulated use time of the equipment and the use time of the equipment;
and the processing module is used for obtaining a reference PWM value according to the previous service time and adjusting the reference PWM value according to the current service time to obtain a real-time PWM value so as to control the real-time output brightness of the equipment.
9. A laser projector, comprising: a processor, and a memory;
the memory is used for storing a computer program, and the processor is used for implementing the brightness attenuation compensation method of any one of claims 1 to 7 when executing the computer program stored in the memory.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the brightness decay compensation method of any one of claims 1 to 7.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110050110A1 (en) * | 2009-09-01 | 2011-03-03 | Hee-Seok Han | Apparatus and method of driving led, system for driving led using the same, and liquid crystal display apparatus including the system |
| US20110068700A1 (en) * | 2009-09-21 | 2011-03-24 | Suntec Enterprises | Method and apparatus for driving multiple LED devices |
| CN105895056A (en) * | 2016-06-17 | 2016-08-24 | 京东方科技集团股份有限公司 | Method for establishing luminance compensation model and screen luminance compensation method and screen luminance compensation device |
| CN106793329A (en) * | 2017-01-06 | 2017-05-31 | 广东德洛斯照明工业有限公司 | A kind of automatic light-supplementing method based on RGBW |
| CN107027213A (en) * | 2017-03-06 | 2017-08-08 | 广东德洛斯照明工业有限公司 | A kind of intelligent constant luminance output control method |
| CN107103885A (en) * | 2017-04-27 | 2017-08-29 | 四川长虹电器股份有限公司 | The TV picture processing method of LED liquid crystal television |
| CN107613602A (en) * | 2017-08-09 | 2018-01-19 | 惠州市华阳光电技术有限公司 | A kind of LED drive power power regulating system and its method |
-
2018
- 2018-10-12 CN CN201811189572.3A patent/CN111045281B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110050110A1 (en) * | 2009-09-01 | 2011-03-03 | Hee-Seok Han | Apparatus and method of driving led, system for driving led using the same, and liquid crystal display apparatus including the system |
| US20110068700A1 (en) * | 2009-09-21 | 2011-03-24 | Suntec Enterprises | Method and apparatus for driving multiple LED devices |
| CN105895056A (en) * | 2016-06-17 | 2016-08-24 | 京东方科技集团股份有限公司 | Method for establishing luminance compensation model and screen luminance compensation method and screen luminance compensation device |
| CN106793329A (en) * | 2017-01-06 | 2017-05-31 | 广东德洛斯照明工业有限公司 | A kind of automatic light-supplementing method based on RGBW |
| CN107027213A (en) * | 2017-03-06 | 2017-08-08 | 广东德洛斯照明工业有限公司 | A kind of intelligent constant luminance output control method |
| CN107103885A (en) * | 2017-04-27 | 2017-08-29 | 四川长虹电器股份有限公司 | The TV picture processing method of LED liquid crystal television |
| CN107613602A (en) * | 2017-08-09 | 2018-01-19 | 惠州市华阳光电技术有限公司 | A kind of LED drive power power regulating system and its method |
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