CN104143323A - Micro-power-consumption energy-saving displaying method - Google Patents
Micro-power-consumption energy-saving displaying method Download PDFInfo
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- CN104143323A CN104143323A CN201410351148.XA CN201410351148A CN104143323A CN 104143323 A CN104143323 A CN 104143323A CN 201410351148 A CN201410351148 A CN 201410351148A CN 104143323 A CN104143323 A CN 104143323A
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Abstract
The invention discloses a micro-power-consumption energy-saving displaying method in the technical field of energy-saving displaying. The micro-power-consumption energy-saving displaying method includes the steps that the light transmitting characteristic and the light shading characteristic of a liquid crystal display are controlled according to the environment illumination to form a shade stroke display mode and a light stroke display mode respectively, it is guaranteed that contrast which can be distinguished by the eyes exists between display content and the background, and needed information is read out. According to the micro-power-consumption energy-saving displaying method, energy-saving displaying is achieved through the light-shade contrast, the information can be displayed only by correspondingly selecting light strokes and shade strokes, consumption of electric energy is reduced, and the micro-power-consumption energy-saving displaying method can be applied to the technical fields such as perpetual calendars, exchange rate display screens of banks and domestic digital meters.
Description
Technical field
The invention belongs to energy-conservation display technique field, particularly a kind of micro-power consumption energy-saving displaying method.
Background technology
Display screen is certain e-file to be shown to a kind of show tools that reflexes to again human eye on screen by specific transmission equipment.Its application is very extensive, arrives greatly satellite monitoring, little of mobile phone, PAD demonstration.In the process that he issues in information, occupy critical role, can say that, in modern society, its figure is ubiquitous.
And for the display screen such as exchange rate display screen, household digital table as perpetual calendar, bank, for existing LED and LCD display, it is not enough, and main manifestations is that LED and LCD utilize electric energy, produces the light of certain brightness.LED is that LCD is that shading and the light transmission features of controlling screen show with the directly demonstration of this light.In the time that the illumination producing is greater than the illumination of surrounding environment, form comparison of light and shade, information can be captured by human eye.And display screen present position difference, in different time sections, the illumination of surrounding environment is also not quite similar.Ensure that display screen can use, the bright intensity that must will produce is greater than the maximum intensity of surrounding environment.When surrounding environment illumination is larger, only have the high-brightness light of generation to produce contrast with environment bright; And when environment is darker around, there is no need to produce the light of high brightness, and so just caused energy dissipation, and the high-brightness light producing is more dazzling, easily eye is damaged.
In order to respond the call of national energy-saving and emission-reduction policy, a lot of patents have all been done suitable improvement to display screen.
Chinese patent 201120482767 (on 08 01st, 2012 day for announcing) relates to display technology field, it comprises housing, LCDs and spontaneous tabula rasa, LCDs is fixed on the leading section of housing, the side opening of described housing is useful on the mounting hole that inserts spontaneous tabula rasa, and spontaneous tabula rasa is plugged in the rearward end of housing by mounting hole.Spontaneous tabula rasa can absorb after natural light luminous under darker environment, be used for providing area source to LCDs, therefore before using, spontaneous tabula rasa is placed under natural light and irradiates a period of time, the mounting hole of the side by housing inserts and is socketed in housing again, just can provide area source for LCDs.
Chinese patent 201010101892 (on 06 16th, 2010 day for announcing) discloses a kind of energy-efficient display, control loop microprocessor, voltage adjuster are increased, can control mainboard work, thereby can make display under off-mode, automatically reach the object that reduces energy consumption.
Chinese patent 201210566083 (on 04 03rd, 2013 day for announcing) relates to a kind of saving energy of screen display packing and device.Described method comprises the steps: to gather surround lighting light intensity, and is carried out pre-service and be converted to digital signal; Judge the surround lighting light intensity interval under surround lighting light intensity by digital signal; The surround lighting light intensity interval setting in advance according to affiliated surround lighting light intensity interval query and the corresponding table of pulse-width signal, determine the pulse-width signal of exporting; By the brightness output of pulse-width signal control screen.
Chinese patent 201220073902 (Dec 05 2012 day for announcing) discloses the energy-conservation display screen of a kind of LED, display unit plate adopts 3.3V, 5V power supply, TTL is independent separately, adopt lamp to drive and separate the mode separating with lamp lamp, actual conducting operating voltage red, green light pipe adopts different voltage, and LED chip has mode of operation, sleep pattern and zero data form; Select the drive IC of low power consuming, again optimize driving power rectification circuit, use different Power supplies, can entirety reduce the power consumption of 35% left and right.
Chinese patent 201010101892 (on 04 11st, 2012 day for announcing) discloses a kind of energy-efficient display, it is characterized in that: if display is in running order, voltage adjuster is to mainboard output voltage, and mainboard is started working, as the energy-conservation 0.5W that is less than of display after shutdown; If display is in off position, voltage adjuster is not given mainboard output voltage, and mainboard is not also worked, and at this moment display is still in power save mode, the now energy-conservation 0.5W that is less than.
The technology that described patent is used above has all reached energy-conservation object, realizes energy-conservation demonstration but all do not mention application light and shade contrast.Meanwhile, for picture perpetual calendar, the exchange rate display screen of bank, the display screens such as household digital table, the patented technology that above these technology have can not be applied, and some considerations are thorough not, some energy-saving effects are good not, the large-scale popularization in this class display screen of all having no idea.
Summary of the invention
The object of this invention is to provide a kind of micro-power consumption energy-saving displaying method, it is characterized in that, described method is the size according to ambient light illumination, Control Component or MCU control printing opacity and the shading characteristic of LCDs, form respectively dark stroke and bright stroke display mode, ensure that displaying contents and background have the discernmible contrast of human eye.Concrete grammar comprises the steps:
Step 1: according to the corresponding relation of the resistance of selected photoresistance and ambient light illumination, obtain the ambient light illumination L of surrounding environment.
Step 2: the cut off value L that ambient light illumination is set
0, by the ambient light illumination L obtaining and cut off value L
0relatively, when ambient light illumination L is more than or equal to cut off value L
0time, adopt dark stroke display mode, do not select bright source, be that Control Component or MCU control on display screen and need the electric field of the pixel of the content showing to be set to 0, represent low level or without level, now Liquid Crystal Molecules Alignment confusion, stop extraneous natural light light to pass through, realize shading characteristic; Rest of pixels point electric field location is set to 1, represents high level, and now ordered liquid crystal molecule is arranged, and is beneficial to extraneous natural light light and passes through, thereby realize light transmission features.Displaying contents and background are by shading like this
Form light and shade contrast with printing opacity, human eye just can be observed; When ambient light illumination, L is less than L
0, adopt bright stroke display mode.Described bright stroke pattern and dark stroke pattern are specifically realized controlling by Control Component or MCU programming and are shown, dark stroke pattern does not need bright source, and bright stroke pattern needs bright source, and fluorescence is selected in this light source first.
In step 1, the concrete grammar that obtains ambient light illumination L is: by photoresistance R
1with determine resistance resistance R
2be connected on voltage source U.Can obtain according to Ohm law:
U
2＝IR
2 (2)
U
L＝U-U
2 (3)
Can find out according to formula (1), (2), (3), in the time that ambient light illumination changes, the resistance R of photoresistance
1also change voltage U and resistance R thereupon
2constant, the electric current I at the photoresistance two ends of flowing through changes, thereby changes the poor U in fixed value resistance two ends
2, finally change the poor U of photoresistance both end voltage
l.
By the voltage difference U at photoresistance two ends
lthe A/D (analog to digital conversion) of Access Control assembly or MCU mouthful, can obtain the poor U of both end voltage
lnumerical value.Can be obtained the resistance R of photoresistance by formula (4)
1.
According to the corresponding relation of the resistance of selected photoresistance and ambient light illumination, can obtain the ambient light illumination L of surrounding environment.
In step 2, according to ambient light illumination and cut off value L
0between magnitude relationship, when ambient light illumination, L is less than L
0time, the process that builds bright stroke display model is:
Step 201: select fluorescence as bright source, when surrounding environment illumination is less than L
0time, Control Component or MCU control display screen, by in LCDs, the electric field of the pixel in the content that needs to show is set to 1, represents high level, now ordered liquid crystal molecule is arranged, be beneficial to fluorescent light and pass through, realize light transmission features, rest of pixels point position is set to shading status, displaying contents and background form light and shade contrast by printing opacity and shading like this, and human eye just can be observed;
Step 202: when surrounding environment illumination is less than L
0and when fluorescence does not discharge, select LED lamp or incandescent lamp as bright source, Control Component or MCU control display screen, by LCDs, the electric field of the pixel in the content that needs to show is set to 1, represent high level, now ordered liquid crystal molecule arrangement, is beneficial to LED lamp or incandescent lamp light passes through, realize light transmission features, rest of pixels point position is set to shading status, and displaying contents and background form light and shade contrast by printing opacity and shading like this, and human eye just can be observed.
After described LCDs, place appropriate fluorescent material and absorb light in the time of dark stroke, in the time of bright stroke, discharge light.
LED lamp or incandescent lamp that described LCDs is placed below, in the time that fluorescence does not discharge, LED lamp or incandescent lamp can be used as bright source, also can be fluorescence and supplement light.
Described photoresistance can real-time monitor surrounding environment illumination intensity signal, according to the display mode of this signal deciding LCDs.
Beneficial effect of the present invention compared with prior art tool has the following advantages:
(1) the present invention adopts light and shade contrast to realize energy-conservation demonstration, only needs the corresponding bright stroke of selection and dark stroke, can show information, in dark stroke pattern, do not adopt bright source, in bright stroke pattern, first adopt fluorescence radiation, reduced the consumption of electric energy.
(2) the inventive method can be applied to picture perpetual calendar, the exchange rate display screen of bank, household digital table.
Brief description of the drawings
Fig. 1 photoresistance connection layout; R1 is photoresistance, and R2 is fixed value resistance, and U is voltage source, and S is switch.
Fig. 2 photoresistance resistance and ambient light illumination L graph of a relation;
Fig. 3 is control procedure flow chart of the present invention;
Fig. 4 is the dark stroke display mode of surrounding environment when brighter;
Fig. 5 is the bright stroke fluorescence display pattern of surrounding environment when darker;
Fig. 6 is bright stroke LED lamp or the incandescent lamp luminescence display pattern of surrounding environment when darker;
Embodiment:
The invention provides a kind of micro-energy consumption display method, be explained below in conjunction with accompanying drawing.
Shown in Fig. 1, by photoresistance R
1with determine resistance resistance R
2be connected on voltage source U.Photoresistance is the resistor that utilizes a kind of resistance value that semi-conductive photoelectric effect is made to change with the power of incident light; Incident light is stronger, and resistance is less, and incident light is more weak, and resistance is larger.When ambient light illumination changes, the resistance R of photoresistance
1also change voltage U and resistance R thereupon
2constant, the electric current I at the photosensitive two ends of flowing through changes, thereby changes the poor U in fixed value resistance two ends
2, finally change photoresistance two ends pressure reduction U
l.By the voltage difference U at photoresistance two ends
lthe A/D (analog to digital conversion) of Access Control assembly or MCU mouthful, can obtain the poor U of both end voltage
lnumerical value.Can be obtained the resistance R of photoresistance by formula (4)
1.According to the corresponding relation of the resistance of selected photoresistance and ambient light illumination (as shown in Figure 2), can obtain the ambient light illumination L (unit is lx) of surrounding environment.The present invention is the cut off value L with dark stroke by bright stroke
0tentatively be decided to be 1lx.When ambient light illumination, L is more than or equal to L
0time, adopt dark stroke display mode; If be less than L
0, adopt bright stroke display mode.And in the time of actual fabrication product, should set as the case may be this cut off value.
Figure 2 shows that photoresistance resistance and ambient light illumination L graph of a relation, can find out the inversely proportional relation of photoresistance resistance and ambient light illumination, between the photoresistance of unlike material and ambient light illumination, have different function curves.
Figure 3 shows that control procedure flow chart of the present invention.First selected Control Component or MCU are carried out to initialization, and think and set boundary parameter L according to extraneous illumination situation
0.MCU is as controlling display module.If select MCU, less demanding to it, mainly contain following some: pin number, more than 20, carries A/D and serial port function, and storage space is more than 8K, the Mega series of recommendation Atmel, the STC12 series of macrocrystalline and the STM32 series of ARM etc.Then according to the size of ambient light illumination, select bright stroke or dark stroke.The physical characteristics of liquid crystal is: Liquid Crystal Molecules Alignment confusion while not adding electric field, stops light to pass through; Add after electric field, it is orderly that Liquid Crystal Molecules Alignment becomes, and light is easily passed through.Therefore electric field can allow liquid crystal as intercepted or allow light penetration as gate.Liquid crystal display has certain resolution, and taking LCD12864 as example, its resolution is 128*64, i.e. its always total 128*64 pixel, and each pixel position can putting in order by electric field controls liquid crystal molecule.When the electric field of a pixel is set to 0 when (low level or without level), the Liquid Crystal Molecules Alignment confusion of this position, stops light to pass through, and realizes shading characteristic; While being set to 1 (high level), ordered liquid crystal molecule is arranged, and is beneficial to light and passes through, and realizes light transmission features.Control Component or MCU can control the electric field of whole LCDs, and it can control shading and the light transmission features of the each pixel of LCDs position.If screen will show date and the time, when dark stroke display mode, select fluorescence or LED lamp or incandescent lamp as bright source, the screen pixels point position at the date Hour Minute Second place of demonstration is simultaneously set to light transmission state, and rest of pixels point position is set to shading status; Bright stroke display mode does not use bright source, and displaying contents pixel position is set to shading status, and rest of pixels point position is set to light transmission state.
Figure 4 shows that dark stroke display mode when surrounding environment is brighter, it is mainly made up of Control Component or MCU, LCDs and photoresistance, alternative serial ports (as RS232, RS485 etc.) and host computer (as computer etc.) or the entering apparatus (as hand-held instrument etc.) of adding, host computer or entering apparatus are linked Control Component by serial ports, by the voltage difference U at photoresistance two ends
lthe A/D (analog to digital conversion) of Access Control assembly or MCU mouthful, can obtain the poor U of both end voltage
lnumerical value.Can be obtained the resistance R of photoresistance by formula (4)
1.According to the corresponding relation of the resistance of selected photoresistance and ambient light illumination, can obtain the ambient light illumination L (unit is lx) of surrounding environment, then with cut off value L
0relatively, be more than or equal to L when record surrounding environment illumination by photoresistance
0time, Control Component or MCU control display screen and open dark stroke pattern.Under this pattern, the present invention does not use bright source, and displaying contents pixel position is set to shading status, and rest of pixels point position is set to light transmission state, and displaying contents position is relatively dark, has formed like this light and shade contrast, and human eye can observe displaying contents.
Shown in Fig. 5, be depicted as the bright stroke display mode of surrounding environment when darker, it is mainly made up of Control Component or MCU, LCDs and photoresistance, alternative serial ports (as RS232, RS485 etc.) and host computer (as computer etc.) or the entering apparatus (as hand-held instrument etc.) of adding, host computer or entering apparatus are linked Control Component by serial ports, by the voltage difference U at photoresistance two ends
lthe A/D (analog to digital conversion) of Access Control assembly or MCU mouthful, can obtain the poor U of both end voltage
lnumerical value.Can be obtained the resistance R of photoresistance by formula (4)
1.According to the corresponding relation of the resistance of selected photoresistance and ambient light illumination, can obtain the ambient light illumination L (unit is lx) of surrounding environment, then with cut off value L
0relatively, be less than L when record surrounding environment illumination by photoresistance
0time, Control Component or MCU control display screen and open bright stroke display mode.Under this pattern, select fluorescence as bright source, displaying contents pixel position is set to light transmission state simultaneously, and rest of pixels point position is set to shading status, and displaying contents position is relatively bright like this, and light and shade presents a contrast, and human eye just can be observed.
Figure 6 shows that the bright stroke display mode for subsequent use when surrounding environment is darker, when surrounding environment illumination is less than L
0and fluorescence do not discharge or discharge bright undercapacity with allow human eye find time, can enable LED lamp or incandescent lamp, it both can be used as the bright source of LCDs, can be again that fluorescent material supplements bright intensity, increase accommodation of the present invention, opened up extensively application.
Claims (6)
1. a micro-power consumption energy-saving displaying method, it is characterized in that, described method is the size according to ambient light illumination, Control Component or MCU control printing opacity and the shading characteristic of LCDs, form respectively dark stroke and bright stroke display mode, ensure that displaying contents and background have the discernmible contrast of human eye, specifically comprise the steps:
Step 1: according to the corresponding relation of the resistance of selected photoresistance and ambient light illumination, obtain the ambient light illumination L of surrounding environment;
Step 2: the cut off value L that ambient light illumination is set
0, by the ambient light illumination L obtaining and cut off value L
0relatively, when ambient light illumination L is more than or equal to cut off value L
0time, adopt dark stroke display mode, do not select bright source; Be to need the electric field of the pixel of the content showing to be set to 0 on Control Component or MCU control display screen, represent low level or without level, now Liquid Crystal Molecules Alignment confusion, stop extraneous natural light light to pass through, realize shading characteristic, rest of pixels point electric field location is set to 1, represents high level, now ordered liquid crystal molecule is arranged, and is beneficial to extraneous natural light light and passes through; Thereby realize light transmission features, displaying contents and background form light and shade contrast by shading and printing opacity like this, and human eye just can be observed; When ambient light illumination, L is less than L
0, adopt bright stroke display mode; Described bright stroke pattern and dark stroke pattern are specifically realized controlling by Control Component or MCU programming and are shown, dark stroke pattern does not need bright source, and bright stroke pattern needs bright source, and fluorescence is selected in this light source first.
2. the micro-power consumption energy-saving displaying method of one according to claim 1, is characterized in that, in described step 1, the concrete grammar that obtains ambient light illumination L is: by photoresistance R
1with determine resistance resistance R
2be connected on voltage source U upper, can obtain according to Ohm law:
U
2＝IR
2 (2)
U
L＝U-U
2 (3)
Can find out according to formula (1), (2), (3), in the time that ambient light illumination L changes, the resistance R of photoresistance
1also change voltage U and resistance R thereupon
2constant, the electric current I at the photoresistance two ends of flowing through changes, thereby changes the poor U in fixed value resistance two ends
2, finally change the poor U of photoresistance both end voltage
l;
By the voltage difference U at photoresistance two ends
lthe A/D analog to digital conversion mouth of Access Control assembly or MCU, can obtain the poor U of both end voltage
lnumerical value; Can be obtained the resistance R of photoresistance by formula (4)
1,
According to the corresponding relation of the resistance of selected photoresistance and ambient light illumination, can obtain the ambient light illumination L of surrounding environment.
3. the micro-power consumption energy-saving displaying method of one according to claim 1, is characterized in that, in described step 2, according to ambient light illumination L and cut off value L
0between magnitude relationship, when ambient light illumination, L is less than L
0time, the process that builds bright stroke display model is:
Step 201: select fluorescence as bright source, when surrounding environment illumination is less than L
0time, Control Component or MCU control display screen, by in LCDs, the electric field of the pixel in the content that needs to show is set to 1, represents high level, now ordered liquid crystal molecule is arranged, be beneficial to fluorescent light and pass through, realize light transmission features, rest of pixels point position is set to shading status, displaying contents and background form light and shade contrast by printing opacity and shading like this, and human eye just can be observed;
Step 202: when surrounding environment illumination is less than L
0and when fluorescence does not discharge, select LED lamp or incandescent lamp as bright source, Control Component or MCU control display screen, by LCDs, the electric field of the pixel in the content that needs to show is set to 1, represent high level, now ordered liquid crystal molecule arrangement, is beneficial to LED lamp or incandescent lamp light passes through, realize light transmission features, rest of pixels point position is set to shading status, and displaying contents and background form light and shade contrast by printing opacity and shading like this, and human eye just can be observed.
4. the micro-power consumption energy-saving displaying method of one according to claim 1, is characterized in that, places appropriate fluorescent material after described LCDs and absorb light in the time of dark stroke, discharges light in bright stroke.
5. the micro-power consumption energy-saving displaying method of one according to claim 3, is characterized in that, LED lamp or incandescent lamp that described LCDs is placed below, and in the time that fluorescent material does not discharge, LED lamp or incandescent lamp be as bright source, or supplement light as fluorescence.
6. the micro-power consumption energy-saving displaying method of one according to claim 1, is characterized in that, described photoresistance can real-time monitor surrounding environment illumination intensity signal, according to the display mode of this signal deciding LCDs.
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| CN201410351148.XA CN104143323B (en) | 2014-07-22 | 2014-07-22 | A kind of Micro Energy Lose energy-saving displaying method |
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| CN201410351148.XA CN104143323B (en) | 2014-07-22 | 2014-07-22 | A kind of Micro Energy Lose energy-saving displaying method |
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| CN104143323B CN104143323B (en) | 2016-04-20 |
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| CN102236207A (en) * | 2010-04-27 | 2011-11-09 | 于小林 | Liquid crystal display (LCD) system, light emitting diode zone and method applied to electronic window |
| JP4819353B2 (en) * | 2004-12-20 | 2011-11-24 | Ｎｅｃディスプレイソリューションズ株式会社 | Display device |
| CN102591076A (en) * | 2012-03-06 | 2012-07-18 | 复旦大学 | Transflective LCD (liquid crystal display) with transmission-assisted reflection |
| CN102737612A (en) * | 2011-04-08 | 2012-10-17 | 广达电脑股份有限公司 | Multi-mode display device and power saving method thereof |
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2014
- 2014-07-22 CN CN201410351148.XA patent/CN104143323B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4819353B2 (en) * | 2004-12-20 | 2011-11-24 | Ｎｅｃディスプレイソリューションズ株式会社 | Display device |
| CN101751870A (en) * | 2008-12-03 | 2010-06-23 | 精联电子股份有限公司 | Delayed backlight adjusting method of portable electronic device |
| CN201387449Y (en) * | 2009-03-20 | 2010-01-20 | 威胜集团有限公司 | Automatic backlight circuit for electronic electric watt-hour meter |
| CN102236207A (en) * | 2010-04-27 | 2011-11-09 | 于小林 | Liquid crystal display (LCD) system, light emitting diode zone and method applied to electronic window |
| CN102737612A (en) * | 2011-04-08 | 2012-10-17 | 广达电脑股份有限公司 | Multi-mode display device and power saving method thereof |
| CN102591076A (en) * | 2012-03-06 | 2012-07-18 | 复旦大学 | Transflective LCD (liquid crystal display) with transmission-assisted reflection |
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