CN204991098U - Screen intensity is from adjusting module for electronic blackboard - Google Patents
Screen intensity is from adjusting module for electronic blackboard Download PDFInfo
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- CN204991098U CN204991098U CN201520330212.6U CN201520330212U CN204991098U CN 204991098 U CN204991098 U CN 204991098U CN 201520330212 U CN201520330212 U CN 201520330212U CN 204991098 U CN204991098 U CN 204991098U
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- electronic blackboard
- photoresistance
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- photo resistance
- screen intensity
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- 238000005286 illumination Methods 0.000 abstract 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 230000003287 optical effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The utility model relates to a screen intensity is from adjusting module for electronic blackboard, including the photo resistance array that is used for detecting light, the photo resistance array includes 4 at least photo resistance, meets into bridge circuit between every photo resistance and the three resistance, the reverse proportion operational amplifier's of circuit output termination negative pole input, 4 individual photosensitive resistors's photo resistance array constitutes 4 way light output signal, 4 the incoming signal of way light output signal and voltage acquisition integrated circuit board connects, the output signal and the electronic blackboard LED light source of voltage acquisition card are connected, the utility model discloses the power of utilizing the photo resistance array to detect indoor environment light feeds back to the electronic blackboard to the bright area that detects that has secretly greatly improved of control electronic blackboard LED light source has improved the detection precision, and when having guaranteed simultaneously that the ambient light changes, the self -adaptation of luminance provides good electronic blackboard luminance illumination and experiences.
Description
Technical field
The utility model relates to the display of screen auto brightness field, particularly electronic blackboard screen intensity self-regulation module.
Background technology
Electronic blackboard is as the instrument of teaching field, simultaneously as the direction of modernizing teaching, start in comparatively developed regions to popularize, electronic blackboard decreases traditional blackboard and to impart knowledge to students the consumption brought, the greatly less use of chalk and blackboard eraser, low dirt environment is brought to classroom, then traditional blackboard is due to its fixing installation site, and in order to protect the reasonable daylighting area in classroom, the visible angle of blackboard is limited to the change of ambient light, therefore for student, the student particularly sat in the back row, many times effectively can not watch the font on blackboard, certain puzzlement is caused to study, and existing electronic blackboard, brightness of backlight can not be changed in real time, at indoor environment pipeline too bright or cross dark time, also the brightness display effect of image electronic blackboard not can be caused, for student, when wanting to see content, but find the content that can not see clearly above and cause hebetude.
Therefore in the visual field of electronic blackboard, the change that adaptive optical thread environment makes brightness will bring better experience, and existing light is all based on light sensor from change, light sensor is arranged on a fixing position, light is detected in top as screen, and the distribution in classroom enters from the right and left based on light, therefore existing scheme can not well adapt in the such environment in classroom
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, provides electronic blackboard screen intensity self-regulation module.
Realize the technical measures of above-mentioned purpose:
Electronic blackboard screen intensity self-regulation module, comprise the photoresistance array for detecting light, described photoresistance array comprises at least 4 photoresistance, bridge circuit is connected between each photoresistance and three resistance, circuit output end connects the negative input of reverse proportion operational amplifier, the photoresistance array of described 4 photoresistance composition forms 4 road light output signals, described 4 road light output signals are connected with the input signal of voltage acquisition board, and the output signal of described voltage acquisition card is connected with electronic blackboard LED light source.
Further, described photoresistance and the first resistant series, photoresistance is connected by the link of wire with the second resistance and the 3rd resistance with the link of the first resistance, the other end of described first resistance is connected with the other end of the 3rd resistance and accesses power cathode, and the other end of the second resistance is connected with the other end of photoresistance and accesses positive source.
Further, described photoresistance is connected with the negative input of reverse proportion operational amplifier with the link of the first resistance, and the feedback resistance of reverse proportion operational amplifier is in series with adjustable resistance.
Further, described voltage acquisition board is connected with the pci card groove of electronic blackboard.
The beneficial effects of the utility model: utilize photoresistance array to detect the power of ambient room light, feed back to electronic blackboard, and control the bright area secretly greatly improving detection of electronic blackboard LED light source, improve accuracy of detection, when ensure that ambient light changes simultaneously, the self-adaptation of brightness, provides good electronic blackboard brightness lighting experience.
Accompanying drawing explanation
Fig. 1 is anatomical connectivity schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail, to make advantage of the present utility model and feature can be easier to be readily appreciated by one skilled in the art, thus more explicit defining is made to protection domain of the present utility model.
As shown in Figure 1, photoresistance 1 and the first resistant series 2, photoresistance 1 is connected by the link of wire with the second resistance 3 and the 3rd resistance 4 with the link of the first resistance 2, the other end of described first resistance 2 is connected with the other end of the 3rd resistance 4 and accesses power cathode, and the other end of the second resistance 3 is connected with the other end of photoresistance 1 and accesses positive source.
Photoresistance 1 is connected with the negative input of reverse proportion operational amplifier 5 with the link of the first resistance 2, and the feedback resistance of reverse proportion operational amplifier 5 is in series with adjustable resistance 6.
Multiplely above connect to form photoresistance array, comprise at least 4 photoresistance and oppositely proportion operational amplifier 5 form, bridge circuit is formed between each photoresistance 1 and three resistance, the photoresistance array of described 4 photoresistance composition forms 4 road light output signal (IN1, IN2, IN3 and IN4), described 4 road light output signals are connected with the input signal of voltage acquisition board 7, the output signal of described voltage acquisition card 7 is connected with electronic blackboard LED light source 8, voltage acquisition board 7 is plugged in the pci card groove of electronic blackboard, electronic blackboard is by reading the voltage of voltage acquisition board 7, judge indoor light environment, brightness is regulated with the size of current of control output end access electronic blackboard LED light source 8.
When photoresistance array is installed, the Acquisition Circuit that 4 photoresistance are formed is arranged on respectively four limits of screen, by judging the power of light source to the four direction of screen.
The foregoing is only the preferred embodiment of utility model, the utility model includes but not limited to this example, and the utility model can have various modifications and variations.Within all spirit in utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (4)
1. electronic blackboard screen intensity self-regulation module, it is characterized in that: comprise the photoresistance array for detecting light, described photoresistance array comprises at least 4 photoresistance, bridge circuit is connected between each photoresistance and three resistance, circuit output end connects the negative input of reverse proportion operational amplifier, the photoresistance array of described 4 photoresistance composition forms 4 road light output signals, described 4 road light output signals are connected with the input signal of voltage acquisition board, and the output signal of described voltage acquisition card is connected with electronic blackboard LED light source.
2. electronic blackboard screen intensity self-regulation module as claimed in claim 1, it is characterized in that: described photoresistance and the first resistant series, photoresistance is connected by the link of wire with the second resistance and the 3rd resistance with the link of the first resistance, the other end of described first resistance is connected with the other end of the 3rd resistance and accesses power cathode, and the other end of the second resistance is connected with the other end of photoresistance and accesses positive source.
3. electronic blackboard screen intensity self-regulation module as claimed in claim 1, it is characterized in that: described photoresistance is connected with the negative input of reverse proportion operational amplifier with the link of the first resistance, and the feedback resistance of reverse proportion operational amplifier is in series with adjustable resistance.
4. electronic blackboard screen intensity self-regulation module as claimed in claim 1, is characterized in that: described voltage acquisition board is connected with the pci card groove of electronic blackboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520330212.6U CN204991098U (en) | 2015-05-16 | 2015-05-16 | Screen intensity is from adjusting module for electronic blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520330212.6U CN204991098U (en) | 2015-05-16 | 2015-05-16 | Screen intensity is from adjusting module for electronic blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204991098U true CN204991098U (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520330212.6U Active CN204991098U (en) | 2015-05-16 | 2015-05-16 | Screen intensity is from adjusting module for electronic blackboard |
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| Country | Link |
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| CN (1) | CN204991098U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108735167A (en) * | 2018-05-18 | 2018-11-02 | 苏州泛普科技股份有限公司 | Interactive touch-control blackboard |
| CN108766375A (en) * | 2018-05-18 | 2018-11-06 | 苏州泛普科技股份有限公司 | Tunable optical touch-control blackboard |
| CN111419003A (en) * | 2020-06-05 | 2020-07-17 | 杭州依玲凌科技有限公司 | Desk is used in computer software development based on resistance adjustment |
| CN112799433A (en) * | 2021-01-20 | 2021-05-14 | 深圳市达特文化科技股份有限公司 | Character display system based on point light source |
-
2015
- 2015-05-16 CN CN201520330212.6U patent/CN204991098U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108735167A (en) * | 2018-05-18 | 2018-11-02 | 苏州泛普科技股份有限公司 | Interactive touch-control blackboard |
| CN108766375A (en) * | 2018-05-18 | 2018-11-06 | 苏州泛普科技股份有限公司 | Tunable optical touch-control blackboard |
| CN108735167B (en) * | 2018-05-18 | 2020-06-16 | 苏州泛普科技股份有限公司 | Interactive touch blackboard |
| CN111419003A (en) * | 2020-06-05 | 2020-07-17 | 杭州依玲凌科技有限公司 | Desk is used in computer software development based on resistance adjustment |
| CN112799433A (en) * | 2021-01-20 | 2021-05-14 | 深圳市达特文化科技股份有限公司 | Character display system based on point light source |
| CN112799433B (en) * | 2021-01-20 | 2022-08-12 | 深圳市达特文化科技股份有限公司 | Character display system based on point light source |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 266000 Minghui International B Block 27, Wenling Road and Shiling Road Intersection, Laoshan District, Qingdao City, Shandong Province Patentee after: Qingdao Creative Education Information Technology Co.,Ltd. Address before: 266000 Minghui International B Block 27, Wenling Road and Shiling Road Intersection, Laoshan District, Qingdao City, Shandong Province Patentee before: QINGDAO KUNXIAN ELECTRONIC Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Screen intensity is from adjusting module for electronic blackboard Effective date of registration: 20190812 Granted publication date: 20160120 Pledgee: Qingdao Zhongyuan buy Kun financing Company limited by guarantee Pledgor: Qingdao Creative Education Information Technology Co.,Ltd. Registration number: Y2019370010004 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20160120 Pledgee: Qingdao Zhongyuan buy Kun financing Company limited by guarantee Pledgor: Qingdao Creative Education Information Technology Co.,Ltd. Registration number: Y2019370010004 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |