CN1750722A - Method and device for regulating brightness of image display device - Google Patents
Method and device for regulating brightness of image display device Download PDFInfo
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- CN1750722A CN1750722A CN 200410050407 CN200410050407A CN1750722A CN 1750722 A CN1750722 A CN 1750722A CN 200410050407 CN200410050407 CN 200410050407 CN 200410050407 A CN200410050407 A CN 200410050407A CN 1750722 A CN1750722 A CN 1750722A
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Abstract
This invention relatess to a brightness regulation method for image display equipment with light source, which contains storage part for storing light source voltage control value adapted with the difference of circumference light signal value with preset standard value, detection part for converting circumference light voltage value into digital value, control value, microprocessor for extraction form storage part, light source driving part for supplying light, and power supply part. Said invention can reduce power consumption by regulating voltage.
Description
Affiliated technical field
The magnitude of voltage that the present invention relates to a kind of peripheral brightness that detection is obtained is transformed to digital value, and utilizes the difference of conversion digital value that obtains and the fiducial value of setting in advance, regulates the brightness adjusting method and the device of the image display of lamp source brightness.
Background technology
In recent years, for meeting the arrival in home theater epoch, mainly be in some companies or public building, use the rear-projection TV of 40 inches higher levels very general, in general family, also can be by display device receiving television broadcastings such as rear-projection TVs.
As above-mentioned, usually projecting apparatus and rear-projection TV, in order to increase the brightness and contrast, and the product that uses LCD LCD, in general family, extensively popularize, to these Products Development and large-scale production, formed the trend of advancing.The key element that the brightness of this left and right sides projecting apparatus and rear-projection TV and volume size play a decisive role is exactly a lamp source, also requires to possess the lamp source of high brightness when therefore need carry out miniaturization to lamp source.
In order to regulate lamp source brightness, after usually the background luminance around the TV being detected,, utilize visual characteristic that the brightness and the light and shade of signal are regulated according to background around the TV.
Below, with reference to accompanying drawing, the rear-projection TV of regulating conventional visual brightness is described as follows:
Fig. 1 constitutes schematic block diagram for the rear-projection TV of regulating conventional visual brightness.
With reference to Fig. 1 as seen, the rear-projection TV of adjusting picture brightness is to be made of following part: the tuner 100 that radiofrequency signal RF is transformed to baseband signal; The picture signal handling part 110 that baseband signal is deciphered; To the picture signal after 110 decodings of picture signal handling part, the drive division of exporting 120; Bear the microprocessor 130 of overall control task; Lamp source 140; Power supply unit 150; Periphery brightness test section 160.
Periphery brightness test section 160 is after utilizing detection means such as photoconductive cell CDS to detect peripheral brightness, detected peripheral luminance signal to be sent to picture signal handling part 110.
The image brightness signal that picture signal handling part 110 is deciphered peripheral brightness test section 160 Signal Regulation that adapt with peripheral luminance signal that transmit is exported by drive division 120 then.
But, for using liquid crystal display LCD or large-screen digital-code projector DLP or rear-projection TV TV as above-mentioned conventional lights light source, normally under lamp source brightness stationary state, when reducing the brightness value of peripheral brightness, exist and how much reduce brightness value, what problem is lamp source efficient also reduce.
Summary of the invention
The object of the present invention is to provide a kind ofly when regulating picture brightness, can improve the brightness adjusting method and the device of the image display of lamp source efficient according to background luminance.
The control that another object of the present invention provides by lamp source being permitted voltage improves power-efficient, and can reduce the brightness adjusting method and the device of the image display of power consumption.
In order to achieve the above object, from one aspect of the present invention, the brightness regulating apparatus with image display of lamp source is to be made of following part: the storage part that the controlling value of the lamp source service voltage that the difference of peripheral brightness signal value and the prior fiducial value of setting adapts is stored; The test section that the peripheral luminance voltage value transform that detection is obtained is a digital value; Obtain test section digital value that transmits and the difference of setting fiducial value in advance, and a controlling value of the lamp source service voltage that adapts with the difference information of obtaining, the microprocessor that from storage part, extracts; The voltage that the controlling value of the lamp source service voltage that transmits with microprocessor adapts, supply with the lamp source drive division of lamp source;
Above-mentioned test section is to constitute by the photoconductive cell CDS of the detection that is provided with in image display periphery brightness with by the analog-to-digital converter that the magnitude of voltage that photoconductive cell CDS obtains is transformed to digital value.
On another aspect of the present invention, the brightness adjusting method with image display of storage part and lamp source was made up of the following stage: detection-phase is carried out in brightness to the image display periphery; The magnitude of voltage that brightness is detected is transformed to the digital value stage; Obtain the difference stage of digital value and the fiducial value of setting in advance after the conversion; The controlling value of the lamp source service voltage that will adapt with the difference of calculating gained is carried out the extraction stage from storage part; The voltage that the controlling value of the lamp source service voltage that extracts is adapted offers lamp source, and the adjusting stage is carried out in brightness.
Advantage of the present invention is as follows:
Owing to the voltage that lamp source is permitted is controlled, therefore in the time of the picture deepening, can be improved power work efficient, and can reduce the brightness adjusting method and the device of the image display of power consumption.
And, when regulating picture brightness,, therefore can provide the brightness adjusting method and the device of the image display that improves lamp source efficient because the voltage of lamp source allowance is controlled according to background luminance.
Description of drawings
Fig. 1 is the structure chart of image display of the present invention.
Fig. 2 is the flow chart of method for user interface in an embodiment of the present invention.
Fig. 3～Fig. 5 illustrates the accompanying drawing of picture demonstration example in an embodiment of the present invention.
The symbol description of accompanying drawing major part
100: demultplexer 102: video and audio decoder
104: Video processing portion 106: the video efferent
108: section filter 110: DAP portion
112: storage part 114: microprocessor
116: user interface part
Embodiment
Following with reference to accompanying drawing, exemplary embodiments of the present invention is described in detail as follows:
Fig. 2 is that the rear-projection TV of exemplary embodiments of the present invention constitutes schematic block diagram; Fig. 3 is that the rear-projection TV periphery brightness test section of exemplary embodiments of the present invention constitutes schematic block diagram; Fig. 4 is that the lamp source control part of the rear-projection TV of exemplary embodiments of the present invention constitutes schematic block diagram; Fig. 5 is the lamp source brightness adjusting method flow chart of the rear-projection TV of exemplary embodiments of the present invention.
With reference to Fig. 2 as seen, rear-projection TV is to be made of tuner 200, picture signal handling part 210, drive division 220, microprocessor 230, peripheral brightness test section 240, lamp source drive division 250, lamp source 260, power supply unit 270, storage part 280.
Tuner 200 is sent to image processing part 210 after radio frequency rf signal is transformed to baseband signal.
Image processing part 210 is sent to drive division 220 after the baseband signal that sends from tuner 200 is deciphered.
The picture signal that drive division 220 outputs send from picture signal handling part 210.
The controlling value of the lamp source service voltage that the difference of storage part 280 peripheral brightness signal values of storage and the prior luminance reference value of setting adapts.And, lamp source drive division 250, the magnitude of voltage that the controlling value of lamp source 260 service voltages of storage adapts in utilization and the storage part 280 is regulated.
Periphery brightness test section 160 is after utilizing detection means such as photoconductive cell CDS to detect peripheral brightness, detected peripheral luminance signal to be sent to picture signal handling part 110.
To having peripheral brightness test section 240, be described in more detail as follows with reference to Fig. 3 as above-mentioned effect:
With reference to Fig. 3 as seen, peripheral brightness test section 240 is to be made of photoconductive cell CDS detector 300 and analog digital A/D converter 310.
Photoconductive cell CDS detector 300 will detect the brightness of TV periphery; And the magnitude of voltage that analog digital A/D converter 310 obtains photoconductive cell CDS detector 300 is transformed to digital value, is sent to microprocessor 230 then.
Microprocessor 230 is obtained after the difference of peripheral brightness test section 240 peripheral brightness signal value that sends and the fiducial value of setting in advance by calculating, controlling value with the lamp source service voltage that adapts with difference information that calculates, after storage part 280 extractions, be sent to lamp source drive division 250.
Lamp source drive division 250 offers the voltage that microprocessor 230 controlling values that send and the lamp source service voltage adapt power supply unit 270 and lamp source 260, and the brightness of lamp source is controlled.
To having the lamp source drive division 250 of above-mentioned effect, as follows with reference to Fig. 4 more detailed description:
With reference to Fig. 4 as seen, lamp source drive division 250 is to be made of voltage control signal generating unit 400 and converter 410 and inverter 420.
Voltage control signal generating unit 400 is controlled the power supply that power supply unit 270 is supplied with for the signal that the controlling value of the lamp source service voltage that utilizes microprocessor 230 and transmit adapts, and is sent to converter 410 after producing voltage control signal.In voltage control signal, comprise the controlling value of supplying with lamp source voltage here.
Converter 410 in the voltage control signal scope that voltage control signal generating unit 400 transmits, Signal Regulation power supply unit 270 output voltages of using the controlling value with the lamp source service voltage to adapt.
As above-mentioned, lamp source control part 250 is controlled direct current DC-direct current DC converter 410 stage by stage, and at any time the brightness of lamp source 260 is controlled according to the signal value that microprocessor 230 transmits.
Below action specification to rear-projection TV with above-mentioned formation as follows:
According to the order of user's input, microprocessor 230 is selected broadcasting station channel by the control of tuner 200; And tuner 200 is sent to picture signal handling part 210 with selecteed station channel signal.
Picture signal handling part 210 is transformed to intermediate-freuqncy signal with broadcast singal, and to the intermediate-freuqncy signal after the conversion, exports by drive division 220 through the decoding back.
Periphery brightness test section 240 detects the magnitude of voltage of peripheral brightness, and the magnitude of voltage of the peripheral brightness that will detect is sent to microprocessor 230 after being transformed to digital value then.
At this moment, microprocessor 230 is obtained the difference of peripheral brightness test section 240 digital value that transmits and the fiducial value of setting in advance by calculating.Then, the controlling value of the lamp source service voltage that 230 difference information of obtaining of microprocessor adapt is sent to lamp source drive division 250 after storage part 280 extracts.
The voltage that the controlling value of the lamp source service voltage that lamp source drive division 250 will transmit with microprocessor 230 adapts offers lamp source 260, and 260 brightness are controlled to lamp source.
Fig. 5 is the lamp source brightness adjusting method flow chart of exemplary embodiments rear-projection TV of the present invention.
With reference to Fig. 5 as seen, rear-projection TV will detect the brightness S500 of its all marginal ray, and be digital value S502 with the brightness voltage value transform that detects.
Behind execution phase S502, rear-projection TV will be obtained the difference S504 of magnitude of voltage and the fiducial value of setting in advance after the conversion.
Behind execution phase S504, the controlling value of the lamp source service voltage that rear-projection TV will adapt with the difference information of obtaining, S506 after the memory fetch, the voltage that will adapt with the controlling value of the lamp source service voltage that extracts offers lamp source S508.
Then, provide voltage, S510 is regulated in brightness to lamp source.
The present invention is not subjected to the qualification of the foregoing description, in the technology of the present invention thought range, many changes can be arranged, and it is understandable that the colleague is had the general knowledge people.
Claims (3)
1. brightness regulating apparatus with image display of lamp source is characterized in that being made of following part:
The storage part that the controlling value of the lamp source service voltage that the difference of peripheral brightness signal value and the fiducial value of setting is in advance adapted is stored;
The test section that the peripheral luminance voltage value transform that detection is obtained is a digital value;
Obtain test section digital value that transmits and the difference of setting fiducial value in advance, and a controlling value of the lamp source service voltage that the difference information of obtaining adapts, the microprocessor that from storage part, extracts;
The voltage that the controlling value of the lamp source service voltage that transmits with microprocessor adapts, supply with the lamp source drive division of lamp source;
The power supply unit of the voltage that the controlling value with the lamp source service voltage adapts is provided.
2. the brightness regulating apparatus with image display of lamp source according to claim 1 is characterized in that described test section is to be made of following part:
The photoconductive cell of the detection periphery brightness that in image display, is provided with;
The magnitude of voltage that obtains by photoconductive cell is transformed to the analog-to-digital converter of digital value.
3. the brightness adjusting method that has the image display of storage part and lamp source is characterized in that being made of the following stage:
Detection-phase is carried out in brightness to the image display periphery;
The magnitude of voltage that periphery brightness detects is transformed to the digital value stage;
Obtain the difference stage of digital value and the fiducial value of setting in advance after the conversion;
Will with the controlling value of the corresponding lamp source service voltage of the difference of obtaining, from storage part, carry out the extraction stage;
Voltage the controlling value of extracting with the lamp source service voltage adapts offers lamp source, and the adjusting stage is carried out in brightness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410050407 CN1750722A (en) | 2004-09-14 | 2004-09-14 | Method and device for regulating brightness of image display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410050407 CN1750722A (en) | 2004-09-14 | 2004-09-14 | Method and device for regulating brightness of image display device |
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| CN1750722A true CN1750722A (en) | 2006-03-22 |
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| CN 200410050407 Pending CN1750722A (en) | 2004-09-14 | 2004-09-14 | Method and device for regulating brightness of image display device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011150635A1 (en) * | 2010-06-02 | 2011-12-08 | 英飞特光电（杭州）有限公司 | Light emitting diode dimmer |
| CN104093240A (en) * | 2014-06-30 | 2014-10-08 | 广东九联科技股份有限公司 | System for intelligently adjusting environment light |
| CN109975300A (en) * | 2017-12-27 | 2019-07-05 | 群光电子股份有限公司 | Light emitting source detection system and its detection method |
-
2004
- 2004-09-14 CN CN 200410050407 patent/CN1750722A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011150635A1 (en) * | 2010-06-02 | 2011-12-08 | 英飞特光电（杭州）有限公司 | Light emitting diode dimmer |
| CN104093240A (en) * | 2014-06-30 | 2014-10-08 | 广东九联科技股份有限公司 | System for intelligently adjusting environment light |
| CN104093240B (en) * | 2014-06-30 | 2016-08-24 | 广东九联科技股份有限公司 | A kind of system of Intelligent adjustment environment light |
| CN109975300A (en) * | 2017-12-27 | 2019-07-05 | 群光电子股份有限公司 | Light emitting source detection system and its detection method |
| CN109975300B (en) * | 2017-12-27 | 2021-11-19 | 群光电子股份有限公司 | Luminous source detection system and detection method thereof |
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