CN104090634A - Shortsightedness preventing device and method for tablet personal computer - Google Patents
Shortsightedness preventing device and method for tablet personal computer Download PDFInfo
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- CN104090634A CN104090634A CN201410348432.1A CN201410348432A CN104090634A CN 104090634 A CN104090634 A CN 104090634A CN 201410348432 A CN201410348432 A CN 201410348432A CN 104090634 A CN104090634 A CN 104090634A
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Abstract
The invention relates to a shortsightedness preventing device and method for a tablet personal compute. The device comprises a starting module, a detection module, a statistical module and a comparison module. The method comprises the steps that an infrared receiving head and an infrared transmission head of the tablet personal compute are started; single-step detection on infrared receiving signal strength is carried out at rated frequency in a detection period, and each infrared receiving signal strength value detected by a single step is stored; the excess frequency that the infrared receiving signal strength values exceed a signal strength rated value is obtained through statistics; whether a reminding signal is sent out or not is determined by comparing the excess frequency with a set threshold value. Only one infrared transmission lamp and one infrared receiving lamp are adopted, the hardware cost is extremely low, the method is low in implementation cost and high in efficiency, electricity consumed by infrared detection is low, efficiency is improved, electricity consumption is lowered, and the cost performance is higher.
Description
Technical field
The present invention relates to panel computer, relate in particular to a kind of panel computer myopia prevention device and method.
Background technology
Along with the development of electronic technology, panel computer, the digital terminals such as e-book are very universal in China, and increasing people's custom is carried out reading electronic book with panel computer, sees video, the activities such as online.Due to the autoluminescence characteristic of the digital product display screens such as panel computer, closely use for a long time panel computer very large to eye injury, can cause eye eyesight to decline.Toward panel computer etc. above digital product integrated myopia prevention function will be a kind of trend.But existing main myopia prevention means are to identify people's face by front-facing camera, the distance of judgement people's face and screen, but it is very complicated that this method realizes, necessary polygamy is for a front-facing camera, and the technology point of scheme is complicated, relate to a plurality of technology points such as image processing, implement more difficult, recognition speed is slow, most importantly camera must be opened in real time, and identifies people's face by complex calculations, and power consumption further aggravates, this is for electric weight digital products such as panel computer with regard to being critical originally, and this is not a kind of good solution.
Summary of the invention
The object of the invention is to for overcoming the defect of prior art, and a kind of panel computer myopia prevention device and method are provided, for panel computer myopia prevention provides a kind of high-level efficiency and has the solution of cost performance.
For achieving the above object, the present invention is by the following technical solutions:
A panel computer myopia prevention device, comprising:
Start module, for opening infrared receiving terminal and the infrared emission head of panel computer;
Detection module, detects for carry out the single step of the infrared received signal strength of specified number of times in a sense cycle, and stores the infrared received signal strength value that single step each time detects;
Statistical module, occurs that for adding up infrared received signal strength value is greater than the number of times that exceeds the quata of the situation of signal intensity ratings;
Comparison module, determines whether to send alerting signal for the magnitude relationship between number of times threshold values that exceeds the quata according to exceed the quata number of times and setting.
Further, this device also comprises that calibration module comprises for calculate the calibration module of signal intensity ratings before dispatching from the factory:
Calibration initial cell, is vertically positioned over the centre of panel computer for the mutatis mutandis baffle plate of high-ranking officers, the vertical range of itself and panel computer screen is nominal distance;
Calibration start unit, for opening infrared emission head;
Calibration detecting unit, detects for carrying out the single step of the infrared received signal strength of stipulated number;
Calibration computing, for calculating the arithmetic mean of the resulting infrared received signal strength value of repeatedly single step detection, is signal intensity ratings.
Further, single step detects to be undertaken by single step detection module, and single step detection module comprises:
Single initial cell of surveying, for close infrared emission head in front 50ms, the level that makes infrared receiving terminal is high level;
Single start unit of surveying, for opening infrared emission head;
Single detecting unit of surveying, for detecting the level of infrared receiving terminal every 1ms;
, for adding up the level of infrared receiving terminal, there is low level number of times, as infrared received signal strength value in single statistic unit of surveying.
Further, comparison module comprises:
Reminding unit, for when the number of times that exceeds the quata is not less than the threshold values of setting, sends alerting signal.
Further, this device also comprises:
Return to module, for closing infrared receiving terminal and the infrared emission head of panel computer, then enter next sense cycle.
A panel computer myopia prevention method, comprises the following steps:
S1, infrared receiving terminal and the infrared emission head of unlatching panel computer;
S2, the single step of carrying out the infrared received signal strength of specified number of times in a sense cycle detects, and stores the infrared received signal strength value that single step each time detects;
S3, statistics occurs that infrared received signal strength value surpasses the number of times that exceeds the quata of the situation of signal intensity ratings;
S4, according to whether the big or small decision of threshold values of exceed the quata number of times and setting is sent to alerting signal.
Further, the method also comprises for calculate the calibration steps of signal intensity ratings before dispatching from the factory:
The mutatis mutandis baffle plate of high-ranking officers is vertically positioned over the centre of panel computer, and the vertical range of itself and panel computer screen is nominal distance;
Open infrared emission head;
The single step of carrying out the infrared received signal strength of stipulated number detects;
Calculate the arithmetic mean that repeatedly single step detects resulting infrared received signal strength value, be signal intensity ratings.
Further, single step detects and comprises the following steps:
In front 50ms, close infrared emission head, the level that makes infrared receiving terminal is high level;
Open infrared emission head;
Every 1ms, detect the level of infrared receiving terminal;
There is low level number of times in the level of statistics infrared receiving terminal, as infrared received signal strength value.
Further, step S4 comprises the following steps:
S4.1, if the number of times that exceeds the quata is not less than the threshold values of setting, sends alerting signal.
Further, further comprising the steps of after step S4:
S5, closes infrared receiving terminal and the infrared emission head of panel computer and returns to step S1, enters next sense cycle.
The present invention's beneficial effect is compared with prior art:
The present invention only adopts an infrared discharge lamps and infrared receiving light, there is extremely low hardware cost, and the cost compare that method realizes is low and efficiency is high, the power consumption of infrared detection is also lower, compare the myopia prevention scheme of camera, the solution of the present invention has improved efficiency and has also improved power consumption performance, and cost performance is higher; The anti-tampering property of the solution of the present invention is strong simultaneously, accuracy of detection is high.
Accompanying drawing explanation
Fig. 1 is the system chart of device of the present invention;
Fig. 2 is the system chart of calibration module of the present invention;
Fig. 3 is the system chart of single step detection module of the present invention;
Fig. 4 is the installation site schematic diagram of infrared receiving terminal of the present invention, infrared emission head;
Fig. 5 is the process flow diagram of method of the present invention;
Fig. 6 is the process flow diagram of calibration steps of the present invention;
Fig. 7 is the process flow diagram that single step of the present invention detects.
Embodiment
In order to more fully understand technology contents of the present invention, below in conjunction with specific embodiment, technical scheme of the present invention is described further and is illustrated.
The first embodiment
The panel computer myopia prevention device of the first embodiment, is specifically shown in Fig. 1 to Fig. 3, comprising:
Start module 11, for opening infrared receiving terminal and the infrared emission head of panel computer; The infrared signal of the infrared emission head transmitting certain frequency of panel computer, runs into barrier and reflects, and is received the infrared signal reflecting by infrared receiving terminal.
Detection module 12, detects for carry out the single step of the infrared received signal strength of specified number of times in a sense cycle, and stores the infrared received signal strength value that single step each time detects; Particularly, in 7 seconds, carry out 14 single steps and detect, draw 14 infrared received signal strength values.
Statistical module 14, occurs that for adding up infrared received signal strength value is greater than the number of times that exceeds the quata of the situation of signal intensity ratings; Particularly, in 14 infrared received signal strength values of gained, find out the number over signal intensity ratings.
Comparison module 15, determines whether to send alerting signal for the magnitude relationship that exceeds the quata between number of times threshold values according to exceed the quata number of times and setting, point out user by eyes away from panel computer.In the present embodiment, if be greater than signal intensity ratings if surpass 10 infrared received signal strength values in 14 infrared received signal strength values of gained, so just point out user by eyes away from panel computer.
In addition, this device also comprises for calculate the calibration module 20 of signal intensity ratings before dispatching from the factory.The signal intensity of the infrared emission head transmitting on every flat board all can be variant, therefore, need to before dispatching from the factory, determine signal intensity ratings.As shown in Figure 2, calibration module 20 comprises:
Calibration initial cell 21, is vertically positioned over the centre of panel computer for the mutatis mutandis baffle plate of high-ranking officers, the vertical range of itself and panel computer screen is nominal distance (30cm);
Calibration start unit 22, for opening infrared emission head;
Calibration detecting unit 23, detects for carrying out the single step of the infrared received signal strength of stipulated number;
Calibration computing 24, detects the arithmetic mean of resulting infrared received signal strength value for calculating repeatedly single step, be signal intensity ratings that should platform panel computer.
The above-mentioned single step of mentioning detects to be undertaken by single step detection module 30, and it is to detect at short notice infrared received signal strength value that single step detects essence, and 30 action cycles of single step detection module are 500ms.As shown in Figure 3, single step detection module 30 comprises:
Single initial cell 31 of surveying, for close infrared emission head in front 50ms, the level that makes infrared receiving terminal is high level;
Single start unit 32 of surveying, for opening infrared emission head;
Single detecting unit 33 of surveying, for detect the level of infrared receiving terminal every 1ms, particularly, This move continues 450ms;
, for adding up the level of infrared receiving terminal, there is low level number of times, as infrared received signal strength value in single statistic unit 34 of surveying.
In the present embodiment, comparison module 15 comprises:
Reminding unit 151, for when the number of times that exceeds the quata is not less than the threshold values of setting, send alerting signal prompting user by eyes away from panel computer.In the present embodiment, prompting user's mode can be vibration, ejection dialog box or touch-screen flicker.If prompt action is dialog box, after pointing out successfully, if user's point touching screen, just dialog box directly exits so.
After comparison module 15, also comprise:
Return to module 16, for closing infrared receiving terminal and the infrared emission head of panel computer, then enter next sense cycle.Reminding unit is just taken over by returning to unit after having moved, or the number of times that exceeds the quata be less than in set threshold values time, be also to move by returning to unit.
Infrared detection ultimate principle:
When people's face from panel computer screen more close to time, the infrared signal that infrared receiving terminal recipient face reflects is more, the signal that infrared receiving terminal receives is just strong.Be reacted on circuit and be exactly when infrared receiving terminal is not received any infrared signal, infrared receiving terminal signal output pin is high level, and when infrared receiving terminal receives infrared signal, infrared receiving terminal signal output pin is low level, and signal is stronger, the low level time of output pin is longer.
As shown in Figure 4, on panel computer, the position of corresponding infrared emission head 42 and infrared receiving terminal 43 is equipped with through hole 41, and infrared emission head 42 and infrared receiving terminal 43 can not be contained in the centre of panel computer touch-screen.So, barrier for fear of touch-screen outside disturbs, infrared emission head 42 and infrared receiving terminal 43 are departed to through hole 41 center certain distance to be installed, this just make to launch infrared or receive infrared be all from through hole 41 wherein a side carry out, avoid the interference of extraneous barrier, improved accuracy of detection.
The second embodiment
The panel computer myopia prevention method of the second embodiment, process flow diagram comprises Fig. 5 to Fig. 7, the method comprises the following steps:
S1, infrared receiving terminal and the infrared emission head of unlatching panel computer; The infrared signal of the infrared emission head transmitting certain frequency of panel computer, runs into barrier and reflects, and is received the infrared signal reflecting by infrared receiving terminal.
S2, the single step of carrying out the infrared received signal strength of specified number of times in a sense cycle detects, and stores the infrared received signal strength value that single step each time detects; In the second embodiment, in 7 seconds, carry out 14 single steps and detect, draw 14 infrared received signal strength values.
S3, statistics occurs that infrared received signal strength value surpasses the number of times that exceeds the quata of the situation of signal intensity ratings; Particularly, in 14 infrared received signal strength values of gained, find out the number over signal intensity ratings.
S4, according to whether the big or small decision of threshold values of exceed the quata number of times and setting is sent to alerting signal, prompting user by eyes away from panel computer.In the present embodiment, if be greater than signal intensity ratings if surpass 10 infrared received signal strength values in 14 infrared received signal strength values of gained, so just point out user by eyes away from panel computer.
Further, the method also comprises for calculate the calibration steps of signal intensity ratings before dispatching from the factory.The signal intensity of the infrared emission head transmitting on every flat board all can be variant, therefore, need to before dispatching from the factory, determine signal intensity ratings.As shown in Figure 6, calibration steps comprises the following steps:
The mutatis mutandis baffle plate of high-ranking officers is vertically positioned over the centre of panel computer, and the vertical range of itself and panel computer screen is nominal distance (30cm);
Open infrared emission head;
The single step of carrying out the infrared received signal strength of stipulated number detects;
Calculate the arithmetic mean that repeatedly single step detects resulting infrared received signal strength value, be signal intensity ratings.
It is to detect at short notice infrared received signal strength value that the above-mentioned single step of mentioning detects essence, and the single step detection module action cycle is 500ms.As shown in Figure 7, single step detects and comprises the following steps:
In front 50ms, close infrared emission head, the level that makes infrared receiving terminal is high level;
Open infrared emission head;
The level that detects infrared receiving terminal every 1ms, This move continues 450ms;
There is low level number of times in the level of statistics infrared receiving terminal, as infrared received signal strength value.
Step S4 comprises the following steps:
S4.1, if the number of times that exceeds the quata is not less than the threshold values of setting, sends alerting signal, prompting user by eyes away from panel computer.In the present embodiment, prompting user's mode can be vibration, ejection dialog box or touch-screen flicker.If prompt action is dialog box, after pointing out successfully, if user's point touching screen, just dialog box directly exits so.
Further comprising the steps of after step S4:
S5, closes infrared receiving terminal and the infrared emission head of panel computer and returns to step S1, enters next sense cycle.Reminding unit is just taken over by returning to unit after having moved, or the number of times that exceeds the quata be less than in set threshold values time, be also to move by returning to unit.
Infrared detection ultimate principle:
When people's face from panel computer screen more close to time, the infrared signal that infrared receiving terminal recipient face reflects is more, the signal that infrared receiving terminal receives is just strong.Be reacted on circuit and be exactly when infrared receiving terminal is not received any infrared signal, infrared receiving terminal signal output pin is high level, and when infrared receiving terminal receives infrared signal, infrared receiving terminal signal output pin is low level, and signal is stronger, the low level time of output pin is longer.
More than statement only further illustrates technology contents of the present invention with embodiment, so that reader is easier to understand, but does not represent that embodiments of the present invention only limit to this, and any technology of doing according to the present invention is extended or recreation, is all subject to protection of the present invention.
Claims (10)
1. a panel computer myopia prevention device, is characterized in that, comprising:
Start module, for opening infrared receiving terminal and the infrared emission head of panel computer;
Detection module, detects for carry out the single step of the infrared received signal strength of specified number of times in a sense cycle, and stores the infrared received signal strength value that single step each time detects;
Statistical module, occurs that for adding up infrared received signal strength value is greater than the number of times that exceeds the quata of the situation of signal intensity ratings;
Comparison module, determines whether to send alerting signal for the magnitude relationship between number of times threshold values that exceeds the quata according to exceed the quata number of times and setting.
2. panel computer myopia prevention device as claimed in claim 1, is characterized in that, this device also comprises that calibration module comprises for calculate the calibration module of signal intensity ratings before dispatching from the factory:
Calibration initial cell, is vertically positioned over the centre of panel computer for the mutatis mutandis baffle plate of high-ranking officers, the vertical range of itself and panel computer screen is nominal distance;
Calibration start unit, for opening infrared emission head;
Calibration detecting unit, detects for carrying out the single step of the infrared received signal strength of stipulated number;
Calibration computing, for calculating the arithmetic mean of the resulting infrared received signal strength value of repeatedly single step detection, is signal intensity ratings.
3. panel computer myopia prevention device as claimed in claim 1 or 2, is characterized in that, described single step detects to be undertaken by single step detection module, and single step detection module comprises:
Single initial cell of surveying, for close infrared emission head in front 50ms, the level that makes infrared receiving terminal is high level;
Single start unit of surveying, for opening infrared emission head;
Single detecting unit of surveying, for detecting the level of infrared receiving terminal every 1ms;
, for adding up the level of infrared receiving terminal, there is low level number of times, as infrared received signal strength value in single statistic unit of surveying.
4. panel computer myopia prevention device as claimed in claim 1, is characterized in that, described comparison module comprises:
Reminding unit, for when the number of times that exceeds the quata is not less than the threshold values of setting, sends alerting signal.
5. panel computer myopia prevention device as claimed in claim 4, is characterized in that, this device also comprises:
Return to module, for closing infrared receiving terminal and the infrared emission head of panel computer, then enter next sense cycle.
6. a panel computer myopia prevention method, is characterized in that, comprises the following steps:
S1, infrared receiving terminal and the infrared emission head of unlatching panel computer;
S2, the single step of carrying out the infrared received signal strength of specified number of times in a sense cycle detects, and stores the infrared received signal strength value that single step each time detects;
S3, statistics occurs that infrared received signal strength value surpasses the number of times that exceeds the quata of the situation of signal intensity ratings;
S4, according to whether the big or small decision of threshold values of exceed the quata number of times and setting is sent to alerting signal.
7. panel computer myopia prevention method as claimed in claim 6, is characterized in that, also comprises for calculating the calibration steps of signal intensity ratings before dispatching from the factory before step S1:
The mutatis mutandis baffle plate of high-ranking officers is vertically positioned over the centre of panel computer, and the vertical range of itself and panel computer screen is nominal distance;
Open infrared emission head;
The single step of carrying out the infrared received signal strength of stipulated number detects;
Calculate the arithmetic mean that repeatedly single step detects resulting infrared received signal strength value, be signal intensity ratings.
8. the panel computer myopia prevention method as described in claim 6 or 7, is characterized in that, described single step detects and comprises the following steps:
In front 50ms, close infrared emission head, the level that makes infrared receiving terminal is high level;
Open infrared emission head;
Every 1ms, detect the level of infrared receiving terminal;
There is low level number of times in the level of statistics infrared receiving terminal, as infrared received signal strength value.
9. panel computer myopia prevention method as claimed in claim 6, is characterized in that, described step S4 comprises the following steps:
S4.1, if the number of times that exceeds the quata is not less than the threshold values of setting, sends alerting signal.
10. panel computer myopia prevention method as claimed in claim 1, is characterized in that, further comprising the steps of after described step S4:
S5, closes infrared receiving terminal and the infrared emission head of panel computer and returns to step S1, enters next sense cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410348432.1A CN104090634A (en) | 2014-07-21 | 2014-07-21 | Shortsightedness preventing device and method for tablet personal computer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410348432.1A CN104090634A (en) | 2014-07-21 | 2014-07-21 | Shortsightedness preventing device and method for tablet personal computer |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410348432.1A Pending CN104090634A (en) | 2014-07-21 | 2014-07-21 | Shortsightedness preventing device and method for tablet personal computer |
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| CN104679141A (en) * | 2015-02-10 | 2015-06-03 | 上海果联信息科技有限公司 | Flat computer protection shell with ranging function |
| CN106020486A (en) * | 2016-05-31 | 2016-10-12 | 广东美的制冷设备有限公司 | Control method for infrared gesture recognition device, infrared gesture recognition device and equipment |
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| US20060146031A1 (en) * | 2005-01-05 | 2006-07-06 | Hui-Chen Wang | Wireless touch-control panel and information process system using the same |
| CN201732461U (en) * | 2009-12-11 | 2011-02-02 | 孙移生 | Myopia-preventing alarm for computers |
| CN201774586U (en) * | 2010-06-29 | 2011-03-23 | 孙移生 | Myopia-preventing computer camera |
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