CN1831639A - Brigtness regulating system for projection lamp and its method - Google Patents
Brigtness regulating system for projection lamp and its method Download PDFInfo
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- CN1831639A CN1831639A CN 200510121314 CN200510121314A CN1831639A CN 1831639 A CN1831639 A CN 1831639A CN 200510121314 CN200510121314 CN 200510121314 CN 200510121314 A CN200510121314 A CN 200510121314A CN 1831639 A CN1831639 A CN 1831639A
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Abstract
A method for automatically regulating brightness of projection lamp includes using conversion switch to call out and to operate automatic regulation subprogram of projection lamp brightness, using brightness transducer to collect information of indoor light illumination and converting said information to be digital signal by A / D converter, sending digital information to CPU for comparing it with standard data then issuing command code to digital power regulator for carrying out automatic regulation on brightness of projection lamp. The system for realizing said method is also disclosed.
Description
Technical field
The present invention relates to improvement, specifically to the improvement of projection lamp brightness regulation technology in the projector equipment to existing projector equipment.
Background technology
Along with the progress of society, work, the improving constantly of living standard, the use of equipment such as rear-projection TV, projector is promoted constantly obtaining.Because the power of projection lamp is bigger in the projector equipment, the luminance brightness scope that is produced is also bigger.People are not considering the comfortableness of human eye to luminance brightness in the switch ambient light at ordinary times.If it is improper that luminance brightness is regulated, make that the people works before display device, be easy to fatigue during amusement.The problem of exist actually is, everyone is inequality to the adaptability of luminance brightness, interior lighting system is exchanged domain border intensity of illumination also can produce very big influence, and the luminance brightness adjustment that the projector equipment that enters duty is carried out projection lamp almost is frequent with necessary.Now along with work the improving constantly of living standard, the use of projector equipment is promoted constantly obtaining, but the puzzlement people's is: the serviceable life of projection bulb is short, the use cost height.From the angle projection lamp automatic brightness adjustment technology of saving also is to be badly in need of solving.Prior art is to adjust ambient lighting intensity with the switch interior lighting system mostly, or the brightness of manual adjustments display device.
Summary of the invention
The objective of the invention is to design extremely projection lamp automatic brightness adjustment method of a Brigtness regulating system for projection lamp, to adapt to projector equipment, further realize adaptability and the purpose that reaches the prolongation projection lamp life-span to the different user vision to the frequent needs of regulating of projection lamp.
Concrete technical scheme of the present invention is at first to set up a Brigtness regulating system for projection lamp.Comprise the central control unit (CPU) in the projector equipment in the system, store primary control program and projection lamp automatic brightness adjustment subroutine EEPROM, key is also to be provided with in the system luminance brightness sensor, the voltage signal that spreads out of from the luminance brightness sensor is connected to A/D converter, be converted into digital signal is delivered to central control unit (CPU) again through intermediate store D_BUS input port from A/D converter, luminance brightness digital controlled signal after CPU handles is drawn from the I/O output port of central control unit (CPU), deliver to the digital power regulator through another intermediate store) control end, the digital power regulator) voltage output end connects the load projection lamp, and the I/O input port of central control unit (CPU) connects a pulse digital signal generation circuit by the automatic/hand switch.
The method of the realization projection lamp automatic brightness adjustment of the supporting design of the present invention, this method is by means of the central control unit (CPU) in the existing projector equipment and be stored in a main mouth control program among the EEPROM, and its key is to carry out according to following step:
1. according to the said system of claim 1 original projector equipment is improved, the luminance brightness sensor is set, the voltage signal that spreads out of from the luminance brightness sensor is connected to A/D converter, be converted into digital signal is delivered to central control unit (CPU) again through intermediate store D_BUS input port from A/D converter, luminance brightness digital controlled signal after CPU handles is drawn from the I/O output port of central control unit (CPU), deliver to the control end of digital power regulator through another intermediate store, the voltage output end of digital power regulator connects the load projection lamp, the I/O input port of central control unit (CPU) connects a pulse digital signal generation circuit by the automatic/hand switch, feels the pairing normal data of comfortable luminance brightness comprising storage projection lamp automatic brightness adjustment subroutine in EEPROM and with people's vision.
2. access out and move projection lamp automatic brightness adjustment subroutine, change projection lamp automatic brightness adjustment pattern over to the primary control program request of sending by the automatic/hand switch,
3. by the indoor illuminance information of luminance brightness sensor acquisition, be converted into voltage signal and deliver to A/D converter and be converted into digital signal, again through the D_BUS input port of delivering to central control unit (CPU) of intermediate store,
Indoor illuminance numerical information that 4. will collect under the support of projection lamp automatic brightness adjustment subroutine and people's vision feel that the pairing normal data of comfortable luminance brightness compares, and calculate the command code that influences the digital power regulator,
5. command code is delivered to the digital power regulator through intermediate store, finishes automatic adjusting to projection lamp brightness by the digital power regulator,
6. repeat above step and feel that until illuminance numerical information and people's vision difference that the pairing normal data of comfortable luminance brightness compares is less than the error amount of setting.
Good effect of the present invention is that native system can be finished the projection lamp automatic brightness adjustment quickly and efficiently under particular environment, can become the relation of logarithm automatically real-time display device output intensity of illumination to be carried out the adjustment of hommization with light output brightness according to the individual subscriber visual experience, reach the intensity of illumination of human eye the most comfortable; Can make full use of ambient light output is reduced, cause projection bulb can increase substantially serviceable life, reduce the light output of display device as far as possible, also can energy savings, improve comfort level, prolong the serviceable life of bulb.
Further specify below in conjunction with accompanying drawing that the object of the present invention is achieved like this.
Description of drawings
Fig. 1 is the system architecture diagram among the present invention.
Fig. 2 is embodiment electrical schematic diagram of luminance brightness sensor.
Fig. 3 is a projection lamp automatic brightness adjustment subroutine logic diagram.
Wherein 1 represent the luminance brightness sensor, 2 represent A/D converter, and 3 represent intermediate store, CPU represents the central control unit in the projector equipment, and 4 represent intermediate store, and 5 represent the digital power regulator chip, 6 represent projection lamp, and 7 represent pulse digital signal generation circuit.K represents manual adjusting switch, and R* represents photoresistance, and R1-R4 is a conventional, electric-resistance, and C1, C2 are electric capacity, and G is a triode.
Embodiment
With reference to Fig. 1 can be fully aware of understanding the present invention in the structure of Brigtness regulating system for projection lamp comprise central control unit (CPU) in the projector equipment, store the scratch pad memory EEPROM of primary control program and projection lamp automatic brightness adjustment subroutine, key Design is also to be provided with luminance brightness sensor 1 in the system, the voltage signal that spreads out of from luminance brightness sensor 1 is connected to A/D converter 2, be converted into digital signal is delivered to central control unit CPU again through intermediate store 3 D_BUS input port from A/D converter 2, luminance brightness digital controlled signal after CPU handles is drawn from the I/O output port of central control unit CPU, deliver to the control end of digital power regulator 5 through intermediate store 4, the voltage output end of digital power regulator 5 connects load projection lamp 6, and the I/O input port of central control unit CPU is by automatic/hand switch K.
Fig. 2 is an embodiment of the luminance brightness sensor (1) that provides, the voltage amplifier circuit that the extremely peripheral Resistor-Capacitor Unit of triode G that it is a base electrode bias resistance by a photoresistance R* is formed, the voltage signal after the amplification is delivered to the input port of A/D converter 2 by the output terminal of triode G.Different luminance brightness is returned and is made the resistance of photoresistance R* produce the variation of response, thereby the base stage bias current of triode is changed thereupon, and the voltage that causes the output terminal of triode G to deliver to the input port of A/D converter 2 then is converted into the digital signal that corresponding luminance brightness changes after producing relative variation .A/D converter.
Intermediate store (3) can adopt the chip of 74LS series, and intermediate store (4) and digital power regulator (5) specifically adopt the PHILLPS lamp controller, and model is EUC120P.
Referring to Fig. 1, the method for the realization projection lamp automatic brightness adjustment of the clearer understanding the present invention design of Fig. 2 and Fig. 3 projection lamp automatic brightness adjustment subroutine logic diagram energy.
Realize the method for projection lamp automatic brightness adjustment, this method is by means of the central control unit (CPU) in the existing projector equipment and be stored in a main mouth control program among the EEPROM, carry out according to following step: 1. original projector equipment is improved according to the said system of claim 1, luminance brightness sensor 1 is set, the voltage signal that spreads out of from luminance brightness sensor 1 is connected to A/D converter 2, be converted into digital signal is delivered to central control unit CPU again through intermediate store (3) D_BUS input port from A/D converter 2, luminance brightness digital controlled signal after CPU handles is drawn from the I/O output port of central control unit CPU, deliver to the control end of digital power regulator 5 through intermediate store 4, the voltage output end of digital power regulator 5 connects load projection lamp 6, the I/O input port of central control unit CPU connects a pulse digital signal generation circuit 7 by automatic/hand switch K, feels the pairing normal data of comfortable luminance brightness comprising storage projection lamp automatic brightness adjustment subroutine in EEPROM and with people's vision.
2. access out and move projection lamp automatic brightness adjustment subroutine, change projection lamp automatic brightness adjustment pattern over to the primary control program request of sending by automatic/hand switch K,
3. gather indoor illuminance information by luminance brightness sensor 1, be converted into voltage signal and deliver to A/D converter 2 and be converted into digital signal, deliver to the D_BUS input port of central control unit CPU again through intermediate store 3,
Indoor illuminance numerical information that 4. will collect under the support of projection lamp automatic brightness adjustment subroutine and people's vision feel that the pairing normal data of comfortable luminance brightness compares, and calculate the command code that influences digital power regulator 5,
5. command code is delivered to digital power regulator 5 through intermediate store 4, finishes automatic adjusting to projection lamp brightness by digital power regulator 5,
6. repeat above step and feel that until illuminance numerical information and people's vision difference that the pairing normal data of comfortable luminance brightness compares is less than the error amount of setting.
The present invention has also further designed the method that further realizes the projection lamp automatic brightness adjustment according to user's visual experience:
Also comprise in the concrete steps of the method for realization projection lamp automatic brightness adjustment:
1. after the automatic adjusting of finishing projection lamp brightness, on projection screen, show below information: " your be satisfied with brightness of present projection lamp? ", " revising normal brightness? ", provide the expression of positive or negative,
2. after obtaining affirmative acknowledgement (ACK) that the user revises normal brightness, provide corresponding existing brightness icon, the operation steps of normal data is revised in prompting, and repeats above step once more after the brightness according to amended normal data adjustment projection lamp, provide satisfied answer until the user
3. after the user provides satisfied answer, provide following information indicating: " needing to preserve luminance standard? ", obtain depositing amended data in particular address after the positive reply, obtain still preserving primary standard data behind the negative reply.
Claims (5)
1, Brigtness regulating system for projection lamp, comprise the central control unit (CPU) in the projector equipment in the system, store primary control program and projection lamp automatic brightness adjustment subroutine EEPROM, it is characterized in that also being provided with in the system luminance brightness sensor (1), the voltage signal that spreads out of from luminance brightness sensor (1) is connected to A/D converter (2) after amplifying pre-service, be converted into digital signal is delivered to central control unit (CPU) again through intermediate store (3) D_BUS input port from A/D converter (2), luminance brightness digital controlled signal after CPU handles is drawn from the I/O output port of central control unit (CPU), deliver to the control end of digital power regulator (5) through intermediate store (4), the voltage output end of digital power regulator (5) connects load projection lamp (6), and the I/O input port of central control unit (CPU) connects a pulse digital signal generation circuit (7) by automatic/hand switch (K).
2,, it is characterized in that luminance brightness sensor (1) is by a photoresistance (R according to the said Brigtness regulating system for projection lamp of claim 1
*) be a voltage amplifier circuit of the extremely peripheral Resistor-Capacitor Unit composition of triode (G) of base electrode bias resistance, the voltage signal after the amplification is delivered to the input port of A/D converter (2) by the output terminal of triode (G).
3, according to the said Brigtness regulating system for projection lamp of claim 1, it is characterized in that: intermediate store (4) and digital power regulator (5) specifically adopt the PHILLPS lamp controller, and model is EUC120P.
4, a kind of method that realizes the projection lamp automatic brightness adjustment, this method is by means of the central control unit (CPU) in the existing projector equipment and be stored in primary control program among the EEPROM, it is characterized in that carrying out according to following step:
1. according to the said system of claim 1 original projector equipment is improved, luminance brightness sensor (1) is set, the voltage signal that spreads out of from luminance brightness sensor (1) is connected to A/D converter (2), be converted into digital signal is delivered to central control unit (CPU) again through intermediate store (3) D_BUS input port from A/D converter (2), luminance brightness digital controlled signal after CPU handles is drawn from the D_BUS output port of central control unit (CPU), deliver to the control end of digital power regulator (5) through intermediate store (4), the voltage output end of digital power regulator (5) connects load projection lamp (6), the D_BUS input port of central control unit (CPU) connects a pulse digital signal generation circuit (7) by automatic/hand switch (K), feel the pairing normal data of comfortable luminance brightness comprising storage projection lamp automatic brightness adjustment subroutine in EEPROM and with people's vision
2. access and move projection lamp automatic brightness adjustment subroutine, change projection lamp automatic brightness adjustment pattern over to the primary control program request of sending by automatic/hand switch (K),
3. gather indoor illuminance information by luminance brightness sensor (1), be converted into voltage signal and deliver to A/D converter (2) and be converted into digital signal, deliver to the D_BUS input port of central control unit (CPU) again through intermediate store (3),
Indoor illuminance numerical information that 4. will collect under the support of projection lamp automatic brightness adjustment subroutine and people's vision feel that the pairing normal data of comfortable luminance brightness compares, and calculating influences the digital power regulator) command code of (5),
5. command code is delivered to digital power regulator (5) through intermediate store (4), finishes automatic adjusting to projection lamp brightness by digital power regulator (5),
6. repeat above step and feel that until illuminance numerical information and people's vision difference that the pairing normal data of comfortable luminance brightness compares is less than the error amount of setting.
5,, it is characterized in that realizing also comprising in the concrete steps of method of projection lamp automatic brightness adjustment according to the method for the said realization projection lamp of claim 4 automatic brightness adjustment:
1. after the automatic adjusting of finishing projection lamp brightness, on projection screen, show below information: " your be satisfied with brightness of present projection lamp? ", " revising normal brightness? ", provide the expression of positive or negative,
2. after obtaining affirmative acknowledgement (ACK) that the user revises normal brightness, provide corresponding existing brightness icon, the operation steps of normal data is revised in prompting, and repeats above step once more after the brightness according to amended normal data adjustment projection lamp, provide satisfied answer until the user
3. after the user provides satisfied answer, provide following information indicating: " needing to preserve luminance standard? ", obtain depositing amended data in particular address after the positive reply, obtain still preserving primary standard data behind the negative reply.
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| CN 200510121314 CN1831639A (en) | 2005-12-26 | 2005-12-26 | Brigtness regulating system for projection lamp and its method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510121314 CN1831639A (en) | 2005-12-26 | 2005-12-26 | Brigtness regulating system for projection lamp and its method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102088630A (en) * | 2011-01-20 | 2011-06-08 | 中山大学 | System and method for changing visual effect of digital television |
| CN102905421A (en) * | 2012-09-14 | 2013-01-30 | 东莞中山大学研究院 | Method and device for realizing automatic adjustment of LED (light-emitting diode) lamps |
| CN103176339A (en) * | 2012-08-23 | 2013-06-26 | 深圳市金立通信设备有限公司 | System and method for automatically adjusting projection brightness |
| CN104640325A (en) * | 2015-02-16 | 2015-05-20 | 中国标准化研究院 | System and method for designing and evaluating inner space illumination comfort |
| CN105700277A (en) * | 2014-11-26 | 2016-06-22 | 中兴通讯股份有限公司 | Projection brightness adjusting method and projection brightness adjusting device |
-
2005
- 2005-12-26 CN CN 200510121314 patent/CN1831639A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102088630A (en) * | 2011-01-20 | 2011-06-08 | 中山大学 | System and method for changing visual effect of digital television |
| CN103176339A (en) * | 2012-08-23 | 2013-06-26 | 深圳市金立通信设备有限公司 | System and method for automatically adjusting projection brightness |
| CN103176339B (en) * | 2012-08-23 | 2015-09-09 | 深圳市金立通信设备有限公司 | A kind of projection brightness varitrol and method |
| CN102905421A (en) * | 2012-09-14 | 2013-01-30 | 东莞中山大学研究院 | Method and device for realizing automatic adjustment of LED (light-emitting diode) lamps |
| CN105700277A (en) * | 2014-11-26 | 2016-06-22 | 中兴通讯股份有限公司 | Projection brightness adjusting method and projection brightness adjusting device |
| CN105700277B (en) * | 2014-11-26 | 2020-12-22 | 中兴通讯股份有限公司 | Projection brightness adjusting method and device |
| CN104640325A (en) * | 2015-02-16 | 2015-05-20 | 中国标准化研究院 | System and method for designing and evaluating inner space illumination comfort |
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Open date: 20060913 |