CN110361918A - A kind of automatic light control system and the projector with it - Google Patents
A kind of automatic light control system and the projector with it Download PDFInfo
- Publication number
- CN110361918A CN110361918A CN201910613582.3A CN201910613582A CN110361918A CN 110361918 A CN110361918 A CN 110361918A CN 201910613582 A CN201910613582 A CN 201910613582A CN 110361918 A CN110361918 A CN 110361918A
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- 238000001514 detection method Methods 0.000 claims abstract description 24
- 230000001419 dependent effect Effects 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 230000003287 optical effect Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 239000004065 semiconductor Substances 0.000 description 16
- 101100191136 Arabidopsis thaliana PCMP-A2 gene Proteins 0.000 description 4
- 101100048260 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) UBX2 gene Proteins 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 101001020552 Rattus norvegicus LIM/homeobox protein Lhx1 Proteins 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 206010011878 Deafness Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- 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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2053—Intensity control of illuminating light
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a kind of automatic light control system and with its projector, it is related to light regulating technology field.System includes sequentially connected ambient light detection module, main control module, drive module and light source module.The present invention passes through ambient light detection module automatic sensing environment light conditions, and it converts optical signals to electric signal and is sent to main control module, main control module issues the output of corresponding control signal adjustment drive module according to the bright dark degree of environment, to realize the variation of LED light source module brightness, overcome the relatively more fixed the technical issues of being unable to adjust automatically of light source of projector luminance patterns in the prior art, the automatic light control system, which compares traditional manual light modulation, has simplicity, it is easy-to-use, the advantages that practical, maximum value is virtually to save electric energy for user, the call of active response national energy conservation and emission reduction, with good economic and social benefit.
Description
Technical field
The present invention relates to light regulating technology field more particularly to a kind of automatic light control system and with its projector.
Background technique
With the development of network technology, shadow casting technique is more and more mature, and the application of projector is also more and more extensive.Existing skill
In art, conventional light source of projector luminance patterns are relatively more fixed, and usually by the several grades of software set, user of service is as needed
Manually adjust light-source brightness, but actual conditions are projector's works always due to many reasons such as user does not know about or forgets
Make to be completely unnecessary in the environment of night or dark in high brightness mode, it is not intended in cause the wave of electric energy
Take.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
One purpose is to provide a kind of automatic light control system and the projector with it, can automatically adjust light source according to environmental light brightness
Electric energy is greatly saved in brightness.
The technical scheme adopted by the invention is that: a kind of automatic light control system, comprising: ambient light detection module, master control mould
Block, drive module and light source module, the output end of the ambient light detection module are connect with the input terminal of the main control module, institute
The output end for stating main control module is connect with the input terminal of the drive module, the output end of the drive module and the light source die
The input terminal of block connects；
The ambient light detection module is for detecting ambient light signal and the ambient light signal being converted to electric signal hair
It send to the main control module；
The main control module controls the output of the drive module for output control signal according to the electric signal；
The drive module is used to drive the light source module and adjusts the brightness of the light source module.
Further, the ambient light detection module includes photosensitive sensor, current-frequency converter, counter, ADC
Converter, IIC buffer and time control unit, the input terminal of the output end of the photosensitive sensor and the I^2F converter
Connection, the output end of the I^2F converter connect with the input terminal of the counter, the output end of the counter with it is described
The input terminal of ADC converter connects, and the output end of the ADC converter is connect with the input terminal of the IIC buffer, the meter
Number device is connect with the IIC buffer, and the output end of the IIC buffer is connect with the input terminal of the time control unit,
The output end of the time control unit is connect with the input terminal of the counter.
Further, the model ALS-PDIC17-57B of the photosensitive sensor.
Further, the drive module includes light source control chip and BUCK reduction voltage circuit, the main control module it is defeated
Outlet is connect with the input terminal of the light source control chip, the output end of the light source control chip and the BUCK reduction voltage circuit
Input terminal connection, the output end of the BUCK reduction voltage circuit connect with the input terminal of the light source module.
Further, the model DLPA3000 or DLPA3005 of the light source control chip.
Further, the main control module includes main control chip.
Further, it is connected between the ambient light detection module and the main control chip by IIC interface, the environment
Light detection module, which detects ambient light signal and the ambient light signal is converted to electric signal, is sent to institute by the IIC interface
State main control chip.
Further, the main control chip is connect with the drive module by SPI interface, and the main control chip passes through institute
It states SPI interface and outputs control signals to the drive module.
A kind of projector, including a kind of above-mentioned automatic light control system.
Further, the light source module is the projection source of projector.
The beneficial effects of the present invention are:
The present invention converts optical signals to telecommunications by ambient light detection module automatic sensing environment light conditions
It number is sent to main control module, main control module issues the defeated of corresponding control signal adjustment drive module according to the bright dark degree of environment
Out, to realize the variation of LED light source module brightness, the relatively more fixed nothing of light source of projector luminance patterns in the prior art is overcome
Method automatically adjust the technical issues of, the automatic light control system comparison traditional manual light modulation have many advantages, such as it is easy, easy-to-use, practical,
Maximum value is virtually to save electric energy for user, and the call of active response national energy conservation and emission reduction has good economy
And social benefit.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of an embodiment of automatic light control system in the present invention；
Fig. 2 is the structural schematic diagram of an embodiment of ambient light detection module of the present invention；
Fig. 3 is the circuit diagram of an embodiment of drive module in the present invention.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
Embodiment 1
A kind of automatic light control system is present embodiments provided, as shown in Figure 1, being the knot of automatic light control system in the present embodiment
Structure schematic diagram, comprising: ambient light detection module, main control module, drive module and light source module.Wherein, ambient light detection module
Output end and the input terminal of main control module connect, the input terminal of the output end of main control module and drive module connects, and drives mould
The output end of block and the input terminal of light source module connect.
Ambient light detection module is sent to master control for detecting ambient light signal and ambient light signal being converted to electric signal
Module；
Main control module is used to export control signal according to electric signal to control the output of drive module；
Drive module is used to drive light source module and adjusts the brightness of light source module.
The automatic light control system of light source of projector brightness manual adjustment mode compared to the prior art, the present embodiment increases
After ambient light detection module can automatic sensing environment light conditions, and convert optical signals to electric signal and be sent to master control
Module, main control module issues the output of corresponding control signal adjustment drive module according to the bright dark degree of environment, to realize LED
The variation of light source module brightness.The automatic light control system comparison traditional manual light modulation have many advantages, such as it is easy, easy-to-use, practical, most
Big value is virtually to save electric energy, the call of active response national energy conservation and emission reduction for user.
In the present embodiment, main control module includes main control chip.It is connect between ambient light detection module and main control chip by IIC
Mouth connection, ambient light detection module detect ambient light signal and ambient light signal are converted to electric signal and sent by IIC interface
To main control chip.Main control chip is connect with drive module by SPI interface, and main control chip exports control signal by SPI interface
To drive module.Specifically, IIC communications protocol: ambient light detection module detects amount of ambient light variation, and analog quantity is converted to
Digital signal passes to main control chip by IIC interface；SPI communications protocol: main control chip analyzes the IIC data received, and
Dimmer command parameter value is passed into drive module by SPI interface according to sets requirement；Drive module is according to the SPI received
Order parameter adjusts output voltage size, reaches light modulation purpose so as to adjust the size variation of electric current.
In the present embodiment, as shown in Fig. 2, ambient light detection module mainly includes photosensitive sensor, current-frequency conversion
Device, counter, ADC converter, IIC buffer and time control unit.Wherein, the output end of photosensitive sensor and electric current-frequency
The input terminal of rate converter connects, and the output end of current-frequency converter and the input terminal of counter connect, the output of counter
End connect with the input terminal of ADC converter, the output end of ADC converter is connect with the input terminal of IIC buffer, counter and
The connection of IIC buffer, the output end of IIC buffer and the input terminal of time control unit connect, the output of time control unit
End is connect with the input terminal of counter.
Wherein, the model ALS-PDIC17-57B of photosensitive sensor.Specifically, when environment light (such as daylight) is irradiated to light
When dependent sensor, photoelectric current will be generated in the loop, and photoelectric current is converted to frequency by ratio and conveyed by current-frequency converter
To counter, frequency translation is that analog signal transmission gives ADC converter (analog-digital converter) according to preset rules by counter,
ADC converter carries out sampling to analog signal to convert digital signal for analog signal, and refreshes the value of IIC buffer,
Main control chip is by reading the value of IIC buffer, to know corresponding data, and then requires adjustment light source bright according to presetting
Degree.Wherein, time control unit is used to limit the illumination range for the environment light that photosensitive sensor can incude within a certain period of time.
In the present embodiment, drive module includes light source control chip and BUCK reduction voltage circuit.Wherein, the output of main control module
End is connect with the input terminal of light source control chip, and the output end of light source control chip is connect with the input terminal of BUCK reduction voltage circuit,
The output end of BUCK reduction voltage circuit and the input terminal of light source module connect.As shown in figure 3, BUCK reduction voltage circuit by upper metal-oxide-semiconductor Q1,
Lower metal-oxide-semiconductor Q2, inductance L, capacitor C1 and capacitor C2 composition, output voltage VLED are output to the voltage value of light source module
For VLED.Light source control chip controls the height of output voltage VLED by adjusting the switch time of upper metal-oxide-semiconductor Q1, lower metal-oxide-semiconductor Q2
Low variation, the height variation of output voltage VLED determines to flow through the variation of light source module electric current, and then realizes automatic adjustment light source
Brightness.
In the present embodiment, the model DLPA3000 or DLPA3005 of light source control chip.Light source module is R, G, B tri-
Great power LED.Resistance Rlim is current-limiting resistance, and VRlim is the sampled voltage of current-limiting resistance Rlim over the ground, and sampled voltage is anti-deaf to be given
Light source control chip.Referring to Fig. 3, metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4, metal-oxide-semiconductor Q5 control the opening and closing of tri- LED of R, G, B respectively.
Level height (high level 1, the low level 0) combination of two control lines SEL0 and SEL1 determine metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4,
Metal-oxide-semiconductor Q5's is turned on and off, and corresponding relationship is as shown in table 1:
1 SEL0, SEL1 level of table is high/low to be turned on/off corresponding table with metal-oxide-semiconductor Q3, Q4, Q5
| SEL0 | SEL1 | Metal-oxide-semiconductor Q3 | Metal-oxide-semiconductor Q4 | Metal-oxide-semiconductor Q5 |
| 0 | 0 | Conducting | Conducting | Conducting |
| 1 | 0 | It closes | Conducting | Conducting |
| 0 | 1 | Conducting | It closes | Conducting |
| 1 | 1 | Conducting | Conducting | It closes |
It should be noted that above-mentioned corresponding relationship be it is pre-set, can also reset according to actual needs.
Specific dimming process is as follows:
Photosensitive sensor detects the illumination in environment, generates photoelectric current；Current-frequency converter presses ratio for photoelectric current
It is converted to frequency and is conveyed to counter；Counter transmits a signal to ADC converter (analog-to-digital conversion according to certain rule
Device)；The analog signal of acquisition is converted digital signal by ADC converter, and refreshes the value of IIC buffer；Main control chip passes through
The value that IIC interface reads IIC buffer knows corresponding data, and dimmer command parameter value is passed through SPI interface according to sets requirement
Pass to the light source control chip of drive module；Light source control chip is controlled according to the level height of two control lines SEL0 and SEL1
The opening and closing of tri- LED of R, G, B processed；When tri- LED of R, G, B is opened, light source control chip is by adjusting upper metal-oxide-semiconductor
The switch time of Q1, lower metal-oxide-semiconductor Q2, the height of output voltage VLED is controlled, R, G, B are flowed through in the height decision of output voltage VLED
The size of three LED electric currents, electric current is bigger, and light is brighter, and the smaller light of electric current is darker, to realize purpose with an automatic light meter.
Embodiment 2
A kind of projector is present embodiments provided, including the automatic light control system in embodiment 1.
In the present embodiment, above-mentioned light source module is the projection source of projector.By the automatic light control system in embodiment 1
It being set in projector, the projection source of projector can automatically adjust the brightness of projection according to the light and shade of environment light, so that
The image brilliance and environment light projected on curtain more cooperates, and improves user's viewing experience.In addition, night or light compared with
Under dark environment, the projection source brightness of projector also dims automatically, and electric energy is greatly saved.
It is to be illustrated to preferable implementation of the invention, but the invention is not limited to the implementation above
Example, those skilled in the art can also make various equivalent variations on the premise of without prejudice to spirit of the invention or replace
It changes, these equivalent deformations or replacement are all included in the scope defined by the claims of the present application.
Claims (10)
1. a kind of automatic light control system characterized by comprising ambient light detection module, main control module, drive module and light source
Module, the output end of the ambient light detection module are connect with the input terminal of the main control module, the output of the main control module
End is connect with the input terminal of the drive module, and the output end of the drive module is connect with the input terminal of the light source module；
The ambient light detection module is sent to for detecting ambient light signal and the ambient light signal being converted to electric signal
The main control module；
The main control module controls the output of the drive module for output control signal according to the electric signal；
The drive module is used to drive the light source module and adjusts the brightness of the light source module.
2. a kind of automatic light control system according to claim 1, which is characterized in that the ambient light detection module includes light
Dependent sensor, current-frequency converter, counter, ADC converter, IIC buffer and time control unit, the photosensitive biography
The output end of sensor is connect with the input terminal of the I^2F converter, output end and the counter of the I^2F converter
Input terminal connection, the output end of the counter are connect with the input terminal of the ADC converter, the output of the ADC converter
End connect with the input terminal of the IIC buffer, the counter is connect with the IIC buffer, the IIC buffer it is defeated
Outlet is connect with the input terminal of the time control unit, the input of the output end of the time control unit and the counter
End connection.
3. a kind of automatic light control system according to claim 2, which is characterized in that the model of the photosensitive sensor
ALS-PDIC17-57B。
4. a kind of automatic light control system according to claim 1, which is characterized in that the drive module includes light source control
Chip and BUCK reduction voltage circuit, the output end of the main control module are connect with the input terminal of the light source control chip, the light
The output end of source control chip is connect with the input terminal of the BUCK reduction voltage circuit, the output end of the BUCK reduction voltage circuit and institute
State the input terminal connection of light source module.
5. a kind of automatic light control system according to claim 4, which is characterized in that the model of the light source control chip
DLPA3000 or DLPA3005.
6. a kind of automatic light control system according to claim 1, which is characterized in that the main control module includes master control core
Piece.
7. a kind of automatic light control system according to claim 6, which is characterized in that the ambient light detection module with it is described
It is connected between main control chip by IIC interface, the ambient light detection module detects ambient light signal and believes the environment light
Number being converted to electric signal is sent to the main control chip by the IIC interface.
8. a kind of automatic light control system according to claim 6, which is characterized in that the main control chip and the driving mould
Block is connected by SPI interface, and the main control chip outputs control signals to the drive module by the SPI interface.
9. a kind of projector, which is characterized in that including a kind of automatic light control system as claimed in any one of claims 1 to 8.
10. a kind of projector according to claim 9, which is characterized in that the light source module is the projection light of projector
Source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910613582.3A CN110361918B (en) | 2019-07-09 | 2019-07-09 | Automatic dimming system and projector with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910613582.3A CN110361918B (en) | 2019-07-09 | 2019-07-09 | Automatic dimming system and projector with same |
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| Publication Number | Publication Date |
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| CN110361918A true CN110361918A (en) | 2019-10-22 |
| CN110361918B CN110361918B (en) | 2024-05-28 |
Family
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| CN201910613582.3A Active CN110361918B (en) | 2019-07-09 | 2019-07-09 | Automatic dimming system and projector with same |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110361918B (en) | 2024-05-28 |
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