CN104078012A - Brightness adjustment circuit based on Raspberry Pi - Google Patents
Brightness adjustment circuit based on Raspberry Pi Download PDFInfo
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- CN104078012A CN104078012A CN201410360666.8A CN201410360666A CN104078012A CN 104078012 A CN104078012 A CN 104078012A CN 201410360666 A CN201410360666 A CN 201410360666A CN 104078012 A CN104078012 A CN 104078012A
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Abstract
The invention relates to a brightness adjustment circuit based on Raspberry Pi. The brightness adjustment circuit comprises a photometric sensor, an analog-digital converter, a Raspberry Pi computer and a PMW (pulse width modulation) signal output end, wherein the photometric sensor is connected with the Raspberry Pi computer through the analog-digital converter; the Raspberry Pi computer is connected with the PMW signal output end and comprises a central processing unit, a memory, a SD (secure digital) card, an internet access and a USB interface; the memory, the SD card, the internet access and the USB interface are connected with the central processing unit respectively; and the central processing unit is connected with the photometric sensor through the analog-digital converter. Compared with the prior art, the brightness adjustment circuit has the advantages of simple structure, powerful functions, convenience in operation, high safety and the like.
Description
Technical field
The present invention relates to a kind of brightness regulating circuit, especially relate to a kind of brightness regulating circuit based on raspberry group.
Background technology
Be directed in portable equipment, the use of LCDs is more and more extensive.Because LCD self can not be luminous, it needs a powerful light source to provide backlight to it, to clearly show information.But the backlight illumination of most of product is all fixed.Fixing backlight illumination is generally to set for darker external environment, and this backlight illumination is optional and power consumption is larger in the stronger situation of extraneous light intensity.
Summary of the invention
Object of the present invention is exactly to provide a kind of simple in structure, powerful, easy to operate, safe brightness regulating circuit based on raspberry group in order to overcome the defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions:
A kind of brightness regulating circuit based on raspberry group, it is characterized in that, comprise that photometry sensor, analog to digital converter, raspberry send computer and PMW signal output part, described photometry sensor sends computer to be connected by analog to digital converter and raspberry, and described raspberry sends computer to be connected with PMW signal output part; Described raspberry sends computer to comprise central processing unit and the internal memory being connected with central processing unit respectively, SD card, network interface and USB interface, and described central processing unit is connected with photometry sensor by analog to digital converter.
Described raspberry sends computer also to comprise the GPU being connected with central processing unit.
Video output interface and audio output interface that described raspberry sends computer also to comprise to be connected with central processing unit.
Also comprise the radio communication circuit of sending computer to be connected with raspberry.
Described radio communication circuit is wireless radio frequency circuit, Bluetooth circuit or ZIGbee circuit.
Also comprise send with raspberry that computer is connected for showing the oscillograph of PMW signal.
Also comprise the alarm of sending computer to be connected with raspberry.
Compared with prior art, the present invention has the following advantages:
1, simple in structure, powerful, utilize raspberry group as realizing environment, raspberry sends self structure little, functional powerful, utilize its this feature of simulation output, in conjunction with photometry sensor BF1750, exempt and utilized photoresistance to make the complicacy of amplifying circuit, more simplified;
2, easy to operate, there is radio function, can realize short-distance wireless control;
3, safe, by alarm is set, report to the police running under abnormal conditions.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
As shown in Figure 1, a kind of brightness regulating circuit based on raspberry group, comprise that photometry sensor 1, analog to digital converter 2, raspberry send computer 3 and PMW signal output part 4, described photometry sensor 1 sends computer 3 to be connected by analog to digital converter 2 and raspberry, and described raspberry sends computer 3 to be connected with PMW signal output part 4; Described raspberry sends computer 3 to comprise central processing unit 31 and the internal memory 32, SD card 33, network interface 34 and the USB interface 35 that are connected with central processing unit 31 respectively, and described central processing unit is connected with photometry sensor by analog to digital converter.
GPU36, video output interface 37 and audio output interface 38 that described raspberry sends computer 3 also to comprise to be connected with central processing unit 31 respectively.
The present invention also comprises respectively with raspberry sends radio communication circuit 5 that computer is connected, for showing oscillograph 6 and the alarm 7 of PMW signal.Described radio communication circuit 5 is wireless radio frequency circuit, Bluetooth circuit or ZIGbee circuit.
The present invention adopts raspberry to send as a single-chip microcomputer, based on the little functional powerful feature of its structure, can make a lot of inventions.The function that possesses simulation output based on it, can carry out regulation and control to the brightness of display.Consider the convenience of reduction and the use of equipment power dissipation, propose for equipment according to the scheme of extraneous light intensity regulating screen backlight at present, mainly make comparison and feedback by accepting extraneous light intensity Signals & Systems inside exactly, the pwm signal of internal circuit control light source is realized regulatory function with this.
Claims (7)
1. the brightness regulating circuit based on raspberry group, it is characterized in that, comprise that photometry sensor, analog to digital converter, raspberry send computer and PMW signal output part, described photometry sensor sends computer to be connected by analog to digital converter and raspberry, and described raspberry sends computer to be connected with PMW signal output part; Described raspberry sends computer to comprise central processing unit and the internal memory being connected with central processing unit respectively, SD card, network interface and USB interface, and described central processing unit is connected with photometry sensor by analog to digital converter.
2. a kind of brightness regulating circuit based on raspberry group according to claim 1, is characterized in that, described raspberry sends computer also to comprise the GPU being connected with central processing unit.
3. a kind of brightness regulating circuit based on raspberry group according to claim 1, is characterized in that, video output interface and audio output interface that described raspberry sends computer also to comprise to be connected with central processing unit.
4. a kind of brightness regulating circuit based on raspberry group according to claim 1, is characterized in that, also comprises the radio communication circuit of sending computer to be connected with raspberry.
5. a kind of brightness regulating circuit based on raspberry group according to claim 4, is characterized in that, described radio communication circuit is wireless radio frequency circuit, Bluetooth circuit or ZIGbee circuit.
6. a kind of brightness regulating circuit based on raspberry group according to claim 1, is characterized in that, also comprise send with raspberry that computer is connected for showing the oscillograph of PMW signal.
7. a kind of brightness regulating circuit based on raspberry group according to claim 1, is characterized in that, also comprises the alarm of sending computer to be connected with raspberry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410360666.8A CN104078012A (en) | 2014-07-25 | 2014-07-25 | Brightness adjustment circuit based on Raspberry Pi |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410360666.8A CN104078012A (en) | 2014-07-25 | 2014-07-25 | Brightness adjustment circuit based on Raspberry Pi |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104078012A true CN104078012A (en) | 2014-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410360666.8A Pending CN104078012A (en) | 2014-07-25 | 2014-07-25 | Brightness adjustment circuit based on Raspberry Pi |
Country Status (1)
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| CN (1) | CN104078012A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114251092A (en) * | 2021-12-22 | 2022-03-29 | 太原理工大学 | Real-time decision and control method for fully mechanized mining equipment based on laser radar |
Citations (6)
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|---|---|---|---|---|
| CN101042841A (en) * | 2006-03-20 | 2007-09-26 | 广达电脑股份有限公司 | Lighteness adjusting apparatus and method thereof |
| CN201035658Y (en) * | 2006-11-03 | 2008-03-12 | 浙江海康信息技术股份有限公司 | Tax-controlled casher with liquid crystal screen brightness automatic regulation function |
| CN201352430Y (en) * | 2009-02-13 | 2009-11-25 | 苏州双林塑胶电子有限公司 | Energy-saving digital photo frame |
| CN101847380A (en) * | 2009-03-27 | 2010-09-29 | 比亚迪股份有限公司 | Liquid crystal display device for automatically adjusting luminance and display method thereof |
| CN202584696U (en) * | 2012-04-01 | 2012-12-05 | 广州市佳思信息科技有限公司 | Digital photo frame display screen brightness night mode regulation and control system |
| CN204010635U (en) * | 2014-07-25 | 2014-12-10 | 上海工程技术大学 | Based on the brightness regulating circuit of raspberry group |
-
2014
- 2014-07-25 CN CN201410360666.8A patent/CN104078012A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101042841A (en) * | 2006-03-20 | 2007-09-26 | 广达电脑股份有限公司 | Lighteness adjusting apparatus and method thereof |
| CN201035658Y (en) * | 2006-11-03 | 2008-03-12 | 浙江海康信息技术股份有限公司 | Tax-controlled casher with liquid crystal screen brightness automatic regulation function |
| CN201352430Y (en) * | 2009-02-13 | 2009-11-25 | 苏州双林塑胶电子有限公司 | Energy-saving digital photo frame |
| CN101847380A (en) * | 2009-03-27 | 2010-09-29 | 比亚迪股份有限公司 | Liquid crystal display device for automatically adjusting luminance and display method thereof |
| CN202584696U (en) * | 2012-04-01 | 2012-12-05 | 广州市佳思信息科技有限公司 | Digital photo frame display screen brightness night mode regulation and control system |
| CN204010635U (en) * | 2014-07-25 | 2014-12-10 | 上海工程技术大学 | Based on the brightness regulating circuit of raspberry group |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114251092A (en) * | 2021-12-22 | 2022-03-29 | 太原理工大学 | Real-time decision and control method for fully mechanized mining equipment based on laser radar |
| CN114251092B (en) * | 2021-12-22 | 2023-08-25 | 太原理工大学 | Fully mechanized mining equipment real-time decision-making and control method based on laser radar |
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Application publication date: 20141001 |
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| RJ01 | Rejection of invention patent application after publication |