CN203968287U - A kind ofly can carry out according to ambient light intensity the Set Top Box of display properties adjustment - Google Patents
A kind ofly can carry out according to ambient light intensity the Set Top Box of display properties adjustment Download PDFInfo
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- CN203968287U CN203968287U CN201420351075.XU CN201420351075U CN203968287U CN 203968287 U CN203968287 U CN 203968287U CN 201420351075 U CN201420351075 U CN 201420351075U CN 203968287 U CN203968287 U CN 203968287U
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- top box
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Abstract
The utility model provides a kind of can carry out the Set Top Box of display properties adjustment according to ambient light intensity, this Set Top Box comprises master chip, and described master chip is provided with signal input IO mouth, and this Set Top Box also comprises optical inductor and analog to digital conversion circuit; Described optical inductor is connected with analog to digital conversion circuit, and the light intensity signal of collection is sent to analog to digital conversion circuit; Analog-digital conversion circuit as described is connected with described signal input IO mouth, converts light intensity signal to corresponding digital signals and sends to signal input IO mouth.The utility model Set Top Box can be adjusted automatically according to environmental change the brightness and contrast of TV display frame, and then can protect human eye.
Description
Technical field
The utility model relates to a kind of Set Top Box, especially relates to a kind ofly carrying out according to ambient light intensity the Set Top Box of display properties adjustment.
Background technology
In recent years, the process of television digitization is obviously accelerated, and analog signal is in full swing to the transition of digital signal, and Set Top Box is just becoming more and more requisite housed devices of user.Increase along with life stress, people's free life is fewer and feweri, be all to sit to see TV at home free time mostly, now, if the brightness and contrast of television image can not follow the variation of environment and adaptation, when user for a long time in this light difference when seeing TV under larger environment, can cause great infringement to human eye, heavy cause blind.At present, a lot of digital TV set-top box can be carried out display properties adjusting, can regulate display properties such as the output brightness of Set Top Box, colourity, contrasts, yet most of user is not very familiar to these functions of Set Top Box, seldom has user can go to use these functions yet.Visible, find and a kind ofly can automatically adjust according to environmental change the brightness and contrast's of TV display frame device, and then reach the object of protection human eye, be a problem demanding prompt solution.
Summary of the invention
The purpose of this utility model is: the problem existing for prior art, providing a kind of can carry out the Set Top Box of display properties adjustment according to ambient light intensity, solved the problem that can not automatically adjust the brightness and contrast of TV display frame by Set Top Box.
The purpose of this utility model is achieved through the following technical solutions:
Can according to ambient light intensity, carry out a Set Top Box for display properties adjustment, this Set Top Box comprises master chip, and described master chip is provided with signal input IO mouth, it is characterized in that, this Set Top Box also comprises optical inductor and analog to digital conversion circuit; Described optical inductor is connected with analog to digital conversion circuit, and the light intensity signal of collection is sent to analog to digital conversion circuit; Analog-digital conversion circuit as described is connected with described signal input IO mouth, converts light intensity signal to corresponding digital signals and sends to signal input IO mouth.
Preferably, described optical inductor is photodiode.
Preferably, analog-digital conversion circuit as described comprises amplifier and gating circuit, and one end of described amplifier connects optical inductor, the other end connects gating circuit, and the described gating circuit other end connects described signal input IO mouth.
Preferably, described signal input IO mouth is provided with three, and described gating circuit is provided with three outputs that match with three signal input IO mouths.
Preferably, output conducting when electric current is 0.5 ~ 1A of described gating circuit, the conducting when electric current is 0.8 ~ 1.5A of another output, the 3rd output conducting when electric current is 1.3 ~ 1.8A.
Compared with prior art, the utlity model has following advantage:
1, by outer setting optical inductor and analog to digital conversion circuit; binary digital signal corresponding to the environmental light intensity signal of collection convert to; and send to signal corresponding on master chip to input IO mouth; master chip arrives the corresponding set point of this signal value according to the signal value receiving by the output brightness of Set Top Box and contrast adjustment; like this; Set Top Box just can be adjusted according to environmental change the brightness and contrast of TV display frame automatically, and then has protected human eye.
2, by being set, analog to digital conversion circuit converted the environmental light intensity in the difference interval being divided into different binary number cleverly, and each binary number is to having an output brightness and contrast adjustment set point, thereby facilitate master chip to identify, greatly improved treatment effeciency and processed accuracy.
Accompanying drawing explanation
Fig. 1 is the system block diagram of the utility model Set Top Box;
Fig. 2 is the circuit connection structure schematic diagram of the utility model Set Top Box.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
embodiment
As shown in Figure 1 and Figure 2, the utility model is a kind of can carry out according to ambient light intensity the Set Top Box of display properties adjustment, it is in tradition, on the basis with the digital TV set-top box of the display properties regulatory functions such as output brightness, colourity, contrast, to improve and form, this kind of Set Top Box hereinafter referred conventional set-top box.Conventional set-top box, with master chip, is equipped with signal input IO mouth 3, PIO1 as shown in Figure 2, PIO2 and PIO3 on its master chip.The utility model has increased optical inductor 1 and analog to digital conversion circuit 2 on the mainboard of conventional set-top box.Optical inductor 1 can adopt commercially available photodiode.Analog to digital conversion circuit 2 is mainly comprised of amplifier and gating circuit.Gating circuit has three outputs that match with PIO1, PIO2 and PIO3 mouth, the conducting when electric current is 0.5 ~ 1A of one of them output, the conducting when electric current is 0.8 ~ 1.5A of another output, the 3rd output conducting when electric current is 1.3 ~ 1.8A.
The output of optical inductor 1 connects the amplifier of analog to digital conversion circuit 2, and the other end of amplifier connects gating circuit, and three ports of gating circuit connect respectively PIO1, PIO2 and the PIO3 mouth of master chip.Optical inductor 1 is used for responding to external optical signals, and the light intensity signal of collection is sent to analog to digital conversion circuit 2, and the amplifier of analog to digital conversion circuit 2 amplifies signal code, is convenient to gating circuit identification.Gating circuit carries out gating according to the current value after amplifying, and draw high the magnitude of voltage of corresponding PIO1, PIO2 and PIO3 mouth, can produce thus binary digit 001,010,011,100,101,110 and 111, different binary digits has represented the environmental light intensity that is positioned at different light intensity value interval.For different interval environmental light intensities, all preset a corresponding Set Top Box output brightness and contrast adjustment set point, and this regulates set point pre-stored in master chip.
When Set Top Box powers on after start; optical inductor 1 induction external optical signals; analog to digital conversion circuit 2 is exported corresponding binary digit according to light signal; Set Top Box master chip reads after this binary digit; immediately the output brightness of Set Top Box and contrast adjustment are arrived to the corresponding adjusting set point of this binary digit; like this, Set Top Box just can be adjusted according to environmental change the brightness and contrast of TV display frame automatically, and then has protected human eye.
In addition, a timer and comparator also can be set, make Set Top Box at the state value (being binary digit) that reads master chip I/O PIO1, a PIO2 and PIO3 pin every about 5 seconds, and the state value of current pin and last pin status value are compared, if changed, immediately by the output brightness of Set Top Box and contrast adjustment to the corresponding adjusting set point of current pin status value.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; it should be pointed out that all any modifications of doing within spirit of the present utility model and principle, be equal to replacement and improvement etc., within all should being included in protection range of the present utility model.
Claims (5)
1. energy carries out a Set Top Box for display properties adjustment according to ambient light intensity, and this Set Top Box comprises master chip, and described master chip is provided with signal input IO mouth, it is characterized in that, this Set Top Box also comprises optical inductor and analog to digital conversion circuit; Described optical inductor is connected with analog to digital conversion circuit, and the light intensity signal of collection is sent to analog to digital conversion circuit; Analog-digital conversion circuit as described is connected with described signal input IO mouth, converts light intensity signal to corresponding digital signals and sends to signal input IO mouth.
2. according to claim 1ly a kind ofly can according to ambient light intensity, carry out the Set Top Box of display properties adjustment, it is characterized in that, described optical inductor is photodiode.
3. according to claim 1ly a kind ofly can carry out according to ambient light intensity the Set Top Box of display properties adjustment, it is characterized in that, analog-digital conversion circuit as described comprises amplifier and gating circuit, one end of described amplifier connects optical inductor, the other end connects gating circuit, and the described gating circuit other end connects described signal input IO mouth.
4. according to claim 3ly a kind ofly can according to ambient light intensity, carry out the Set Top Box of display properties adjustment, it is characterized in that, described signal input IO mouth is provided with three, and described gating circuit is provided with three outputs that match with three signals input IO mouths.
5. according to claim 4ly a kind ofly can carry out according to ambient light intensity the Set Top Box of display properties adjustment, it is characterized in that, output conducting when electric current is 0.5 ~ 1A of described gating circuit, the conducting when electric current is 0.8 ~ 1.5A of another output, the 3rd output conducting when electric current is 1.3 ~ 1.8A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420351075.XU CN203968287U (en) | 2014-06-27 | 2014-06-27 | A kind ofly can carry out according to ambient light intensity the Set Top Box of display properties adjustment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420351075.XU CN203968287U (en) | 2014-06-27 | 2014-06-27 | A kind ofly can carry out according to ambient light intensity the Set Top Box of display properties adjustment |
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| Publication Number | Publication Date |
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| CN203968287U true CN203968287U (en) | 2014-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420351075.XU Active CN203968287U (en) | 2014-06-27 | 2014-06-27 | A kind ofly can carry out according to ambient light intensity the Set Top Box of display properties adjustment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105979311A (en) * | 2016-06-16 | 2016-09-28 | 乐视控股（北京）有限公司 | Method and device for adjusting brightness of television, and terminal |
| WO2024022408A1 (en) * | 2022-07-28 | 2024-02-01 | 京东方科技集团股份有限公司 | Ambient-light detection circuit and detection method, and display apparatus |
-
2014
- 2014-06-27 CN CN201420351075.XU patent/CN203968287U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105979311A (en) * | 2016-06-16 | 2016-09-28 | 乐视控股（北京）有限公司 | Method and device for adjusting brightness of television, and terminal |
| WO2024022408A1 (en) * | 2022-07-28 | 2024-02-01 | 京东方科技集团股份有限公司 | Ambient-light detection circuit and detection method, and display apparatus |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |