CN201904071U - Separated display apparatus brightness adjusting device based on environmental light - Google Patents
Separated display apparatus brightness adjusting device based on environmental light Download PDFInfo
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- CN201904071U CN201904071U CN2010205138759U CN201020513875U CN201904071U CN 201904071 U CN201904071 U CN 201904071U CN 2010205138759 U CN2010205138759 U CN 2010205138759U CN 201020513875 U CN201020513875 U CN 201020513875U CN 201904071 U CN201904071 U CN 201904071U
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- surround lighting
- circuit
- brightness
- display apparatus
- regulating apparatus
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Abstract
The utility model relates to a separated display apparatus brightness adjusting device based on environmental light, which is characterized in that the separated display apparatus brightness adjusting device comprises an environmental light sensing circuit, a main control circuit and a backlight control circuit for controlling the brightness of a display apparatus; the main control circuit receives an output signal of the environmental light sensing circuit to drive the backlight control circuit, and at least part of the adjusting device and the display apparatus are arranged separately. The separated display apparatus brightness adjustor senses the environmental light through a photoelectric sensor and controls the current of a backlight tube in the display apparatus according to the sensing result, thereby automatically adjusting the brightness of the display apparatus according to the environmental light, optimizing the actual display effect of the display apparatus in different illumination environments, effectively reducing the unnecessary energy waste and prolonging the service life of the display apparatus.
Description
Technical field
The utility model relates to a kind of display device brightness regulating apparatus based on surround lighting, particularly a kind of separate type, based on the display device brightness regulating apparatus of surround lighting.
Background technology
Along with the develop rapidly of lcd technology, (Liquid CrystalDisplay, LCD) application in daily life more and more widely for liquid crystal display device.Traditional display mode such as CRT crt display and LED display board etc. all are limited by factors such as the excessive or power consumption of volume is big, can't satisfy consumer's actual demand.And the development of liquid crystal display device just in time suits the trend of present information products, no matter is that the right angle shows, low-power consumption, or advantages such as volume is little, zero radiation, can both allow the user enjoy best visual effect.
The user can carry out freely setting to the screen intensity of liquid crystal display device, but this adjusting often is designed to constant luminance, that is to say after the user is transferred to some values with screen intensity, this liquid crystal display device just shows with a certain constant luminance corresponding with this setting value, and irrelevant with the surrounding environment luminance brightness.The screen intensity default value of liquid crystal display device normally is optimized design with reference to indoor normal illumination state, this will cause in dark surrounds screen intensity relatively too high and relatively too low in the brightness of highlighted environment sub-screen, thereby has influence on the actual displayed effect.And, because the demonstration of this constant luminance when using liquid crystal display device for a long time in dark surrounds, if manually do not go to reduce the brightness of screen, will cause the serviceable life of unnecessary energy resource consumption and shortening liquid crystal display device.
In the current liquid crystal display device, the detecting and the response mechanism of surround lighting is based upon the panel end usually, is integrated in the active-matrix device array effectively detecting and incides illuminance size on the device screen thereby also be about to photoelectric sensor.The shortcoming of this method has been to strengthen the technology difficulty of panel matrix section processing procedure, and causes unnecessary cost to promote greatly owing to component number and device size become.
Summary of the invention
The purpose of this utility model provide a kind of be independent of display device, that antijamming capability is strong, as initiatively to detect surrounding environment light brightness and regulate automatically in view of the above display device screen intensity, can effectively reduce energy dissipation and prolong the display device separable display spare brightness regulating apparatus in serviceable life.
For solving the problems of the technologies described above, the utility model is taked following technical scheme: a kind of separable display spare brightness regulating apparatus based on surround lighting is characterized in that: comprise surround lighting circuit for detecting, governor circuit and be used to control the backlight control circuit of described display device brightness; Described governor circuit receives the output signal of described surround lighting circuit for detecting to drive described backlight control circuit; At least a portion in the described regulating device and described display device are provided with mutually discretely.
Described surround lighting circuit for detecting is integrated in video control panel or power board or button control panel or remote control dash receiver.
Described surround lighting circuit for detecting comprises photoelectric sensor and the sample resistance that is connected in series between power supply and reference voltage.
Described sample resistance is adjustable resistance.
The output signal of described surround lighting circuit for detecting is transfused to described governor circuit after by low-pass filter.
Described governor circuit comprises analog to digital conversion circuit, look-up table, D/A converting circuit and the comparer that is electrically connected successively.
The output of described comparer is pwm signal.
Described output signal is electrically connected with dc bias circuit.
The backlight lamp tube of described display device is cathode fluorescent tube or LED-backlit fluorescent tube.
Described separable display spare brightness regulating apparatus in the utility model is detected surround lighting by photoelectric sensor, and control the size of the electric current of the backlight lamp tube in the display device according to the result of detecting, thereby realize automatically adjusting according to the brightness of surround lighting to display device, to optimize the actual displayed effect of the display device in different illumination environment, effectively reduce unnecessary energy dissipation and prolong serviceable life of display device.
Description of drawings
Fig. 1 is the synoptic diagram based on the separable display spare brightness regulating apparatus of surround lighting in the utility model.
Fig. 2 is the synoptic diagram of an embodiment of surround lighting circuit for detecting among Fig. 1.
Fig. 3 is the synoptic diagram of another embodiment of surround lighting circuit for detecting among Fig. 1.
Fig. 4 is the synoptic diagram of governor circuit among Fig. 1.
Embodiment
Below in conjunction with accompanying drawing the technical solution of the utility model is elaborated.
As shown in Figure 1, described separable display spare brightness regulating apparatus in the utility model comprises surround lighting circuit for detecting 100 and master control borad 200, described master control borad 200 comprises governor circuit 210 and backlight control circuit 230, wherein, the output terminal of described surround lighting circuit for detecting 100 is electrically connected with described governor circuit 210, and described governor circuit 210 is electrically connected with described backlight control circuit 230, changes with the brightness of controlling described backlight control circuit 230 driving liquid crystal panels 300.Preferably, surround lighting circuit for detecting 100 is integrated in video control panel or power board or button control panel or remote control dash receiver.
Fig. 2 shows an embodiment of described surround lighting circuit for detecting 100.As shown in Figure 2, described surround lighting circuit for detecting 100 comprises photoelectric sensor PD, sample resistance R0 and filter capacitor C1; The end of described photoelectric sensor PD is connected with power vd D, its other end is electrically connected with the end of described sample resistance R0, another termination reference voltage V SS of sample resistance R0, the described other end by photoelectric sensor PD is electrically connected a sampling voltage output signal 110, and described sampling voltage output signal 110 is input to described governor circuit 210 as the output of described surround lighting circuit for detecting 100.Preferably, described sampling voltage output signal 100 before being electrically connected to described governor circuit 210 also by described filter capacitor C1 and filtered.Its principle of work is: when the deepening of surrounding environment luminance brightness, the electric current of the photoelectric sensor PD that flows through reduces, and the sampling voltage that this moment, sample resistance R0 upward obtained that is the voltage at node N1 place reduce; When the surrounding environment luminance brightness brightens, the electric current of photoelectric sensor PD of flowing through increases, the sampling voltage that this moment, sample resistance R0 upward obtained that is the voltage at node N1 place become big, thereby can obtain the described sampling voltage output signal 110 of different voltage outputs according to the variation of surrounding environment luminance brightness.
Fig. 3 shows another embodiment of described surround lighting circuit for detecting.As shown in Figure 3, the difference of embodiment among described surround lighting circuit for detecting 101 and Fig. 2 is, in the described embodiment of Fig. 3, on the described sampling voltage output signal 110 between the described other end of described filter capacitor C1 and photoelectric sensor PD, also be in series with a resistance R 1, thereby make described filter capacitor C1 and resistance R 1 constitute a low-pass filter circuit, so that described sampling voltage output signal 110 is carried out filtering, thereby make surround lighting circuit for detecting 101 have the better resisting interference ability.In addition, it is pointed out that in the described circuit of Fig. 1, can replace the surround lighting circuit for detecting of Fig. 2 fully with surround lighting circuit for detecting shown in Figure 3.
Fig. 4 is the synoptic diagram of governor circuit among Fig. 1.As shown in Figure 4, described governor circuit 210 comprises analog to digital conversion circuit 211, look-up table 213, D/A converting circuit 215 and the comparer 218 that is electrically connected successively.Wherein analog to digital conversion circuit 211 is connected with described sampling voltage output signal 110, thereby converts sampling voltage output signal 110 to digital level 212; Then, by searching described look-up table 213, obtain responding digital level 214 corresponding to this input digit level 121; Then, described D/A converting circuit 215 converts this responding digital level 214 to analog level 216, and this analog level 216 and datum 217 are exported corresponding drive signal 220 after described comparer 218 compares, preferably, described drive signal is a pwm signal.
Below described look-up table 213 is elaborated.When the surrounding environment luminance brightness was lower than certain threshold value TH1, photoelectric sensor PD can't correctly detect corresponding brightness to be changed, and described separable display spare brightness regulating apparatus will keep previous state constant and can not change along with the variation of environmental light brightness; In like manner, when the surrounding environment luminance brightness is higher than certain threshold value TH2, described separable display spare brightness regulating apparatus also will keep previous state constant.As seen, the scope of application of this separable display spare brightness regulating apparatus depends in part on the physical characteristics of the photoelectric sensor PD that is adopted.Preferably, described threshold value TH1 is the minimum brightness that photoelectric sensor PD can detect, and described threshold value TH2 is the high-high brightness that photoelectric sensor PD can detect.In the detecting process of photoelectric sensor PD to the surround lighting variation, when environmental light brightness changes between described threshold value TH1 and TH2, the size of current of photoelectric sensor PD of flowing through is the approximate height that is proportional to environmental light brightness, the sampling voltage output signal 110 of surround lighting circuit for detecting 101 outputs this moment also changes along with the variation of surround lighting is linear, thereby causes also linear change thereupon of screen display brightness.But, can cause a kind of adverse consequences like this, promptly when surrounding environment luminance brightness generation slight change, when passing through from the liquid crystal display device front such as the people, the display brightness of liquid crystal display device also can change at once, and this runs counter to the design original intention.For avoiding taking place above-mentioned situation, must set the parameter of governor circuit 210, make and have only when the brightness of surround lighting changes the threshold value that reaches certain, governor circuit 210 just changes the dutycycle of the pwm signal 220 of its output accordingly, thereby the expection according to us is adjusted accordingly to the display brightness of screen, and Here it is the main effect of described look-up table 213 is set.
Preferably, as shown in Figure 1, described sampling voltage output signal 110 also is connected with a dc bias circuit that is made of resistance R 2, to be used for providing a dc offset voltage to described sampling voltage output signal 110, make described sampling voltage output signal 110 a little away from described reference voltage V SS, to promote governor circuit 210 accuracy of actions.
Preferably, the backlight lamp tube 310 among Fig. 1 can be common cathode fluorescent tube, also can be the LED-backlit fluorescent tube.
Further, can set the response accuracy that described separable display spare brightness regulating apparatus changes surround lighting by the parameter of adjusting governor circuit 210.Its principle of work is as follows: in constant light illumination environment, the electric current of photoelectric sensor PD of flowing through also is constant, and when changing the value of sample resistance R0, sampling voltage output signal 110 also changes thereupon, as seen, the value of adjustment sample resistance R0 also can change the response accuracy that surround lighting is changed.
Principle of work below in conjunction with Fig. 1-4 pair of described separable display spare brightness regulating apparatus further specifies.In Fig. 1, when the deepening of surrounding environment luminance brightness, the sampling voltage output signal 110 of surround lighting circuit for detecting 101 outputs diminishes, described sampling voltage output signal 110 is sent to described governor circuit 210 and handles, the dutycycle of first drive signal 220 of governor circuit 210 outputs diminishes, the fluorescent tube drive current 240 that this moment, described backlight control circuit 230 offered described liquid crystal panel 300 diminishes, thereby the luminosity that causes being attached at the backlight lamp tube 310 at liquid crystal panel 300 backs reduces to reduce the display brightness of LCD screen.Otherwise, when the surrounding environment luminance brightness brightens, the sampling voltage output signal 110 of surround lighting circuit for detecting 101 outputs becomes big, this sampling voltage output signal 110 is sent to governor circuit 210 and handles, the dutycycle of first drive signal 220 of governor circuit 210 outputs becomes big, the fluorescent tube drive current 240 that this moment, described backlight control circuit 230 offered described liquid crystal panel 300 becomes big, thereby the luminosity that causes being attached at the backlight lamp tube 310 at described liquid crystal panel 300 backs rises to promote the display brightness of LCD screen.
Described separable display spare brightness regulating apparatus in the utility model is detected surround lighting by photoelectric sensor, and control the size of the electric current of the backlight lamp tube in the display device according to the result of detecting, thereby realize automatically adjusting according to the brightness of surround lighting to display device, to optimize the actual displayed effect of the display device in different illumination environment, effectively reduce unnecessary energy dissipation and prolong serviceable life of display device.
Claims (9)
1. separable display spare brightness regulating apparatus based on surround lighting is characterized in that: comprise surround lighting circuit for detecting, governor circuit and be used to control the backlight control circuit of described display device brightness; Described governor circuit receives the output signal of described surround lighting circuit for detecting to drive described backlight control circuit; At least a portion in the described regulating device and described display device are provided with mutually discretely.
2. the separable display spare brightness regulating apparatus based on surround lighting as claimed in claim 1 is characterized in that: described surround lighting circuit for detecting is integrated in video control panel or power board or button control panel or remote control dash receiver.
3. the separable display spare brightness regulating apparatus based on surround lighting as claimed in claim 1 is characterized in that: described surround lighting circuit for detecting comprises photoelectric sensor and the sample resistance that is connected in series between power supply and reference voltage.
4. the separable display spare brightness regulating apparatus based on surround lighting as claimed in claim 3 is characterized in that: described sample resistance is adjustable resistance.
5. as each described separable display spare brightness regulating apparatus based on surround lighting of claim 1-4, it is characterized in that: the output signal of described surround lighting circuit for detecting is transfused to described governor circuit after by low-pass filter.
6. the separable display spare brightness regulating apparatus based on surround lighting as claimed in claim 5 is characterized in that: described governor circuit comprises analog to digital conversion circuit, look-up table, D/A converting circuit and the comparer that is electrically connected successively.
7. the separable display spare brightness regulating apparatus based on surround lighting as claimed in claim 6, it is characterized in that: the output of described comparer is pwm signal.
8. as claim 1-4, each described separable display spare brightness regulating apparatus of 6-7 based on surround lighting, it is characterized in that: described output signal is electrically connected with dc bias circuit.
9. the separable display spare brightness regulating apparatus based on surround lighting as claimed in claim 8 is characterized in that: the backlight lamp tube of described display device is cathode fluorescent tube or LED-backlit fluorescent tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205138759U CN201904071U (en) | 2010-09-02 | 2010-09-02 | Separated display apparatus brightness adjusting device based on environmental light |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205138759U CN201904071U (en) | 2010-09-02 | 2010-09-02 | Separated display apparatus brightness adjusting device based on environmental light |
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| CN201904071U true CN201904071U (en) | 2011-07-20 |
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| CN2010205138759U Expired - Fee Related CN201904071U (en) | 2010-09-02 | 2010-09-02 | Separated display apparatus brightness adjusting device based on environmental light |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954836A (en) * | 2012-10-26 | 2013-03-06 | 京东方科技集团股份有限公司 | Ambient light sensor, user applying device and display device |
| CN103077686A (en) * | 2013-01-28 | 2013-05-01 | 东莞宇龙通信科技有限公司 | Electronic device and method for regulating screen brightness |
| CN103336664A (en) * | 2013-06-05 | 2013-10-02 | 南京熊猫电子股份有限公司 | Device and method for achieving control of display backlight with soft keyboard |
| WO2014075345A1 (en) * | 2012-11-15 | 2014-05-22 | 创天昱科技(深圳)有限公司 | Pwm light source interference-resistant illumination intensity detection method, apparatus and light source adjusting method |
| CN108231012A (en) * | 2018-01-18 | 2018-06-29 | 青岛海信日立空调系统有限公司 | A kind of adjusting method and device of the backlight illumination of segment encode liquid crystal display |
| CN112750404A (en) * | 2019-10-30 | 2021-05-04 | 深圳Tcl数字技术有限公司 | Brightness adjusting circuit, method and display device of indicator light and backlight |
-
2010
- 2010-09-02 CN CN2010205138759U patent/CN201904071U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954836A (en) * | 2012-10-26 | 2013-03-06 | 京东方科技集团股份有限公司 | Ambient light sensor, user applying device and display device |
| CN102954836B (en) * | 2012-10-26 | 2015-04-15 | 京东方科技集团股份有限公司 | Ambient light sensor, user applying device and display device |
| WO2014075345A1 (en) * | 2012-11-15 | 2014-05-22 | 创天昱科技(深圳)有限公司 | Pwm light source interference-resistant illumination intensity detection method, apparatus and light source adjusting method |
| CN103077686A (en) * | 2013-01-28 | 2013-05-01 | 东莞宇龙通信科技有限公司 | Electronic device and method for regulating screen brightness |
| CN103077686B (en) * | 2013-01-28 | 2016-03-09 | 东莞宇龙通信科技有限公司 | The electronic equipment of adjusting screen brightness and method |
| CN103336664A (en) * | 2013-06-05 | 2013-10-02 | 南京熊猫电子股份有限公司 | Device and method for achieving control of display backlight with soft keyboard |
| CN103336664B (en) * | 2013-06-05 | 2016-10-05 | 南京熊猫电子股份有限公司 | A kind of device and method realizing control of display backlight with soft keyboard |
| CN108231012A (en) * | 2018-01-18 | 2018-06-29 | 青岛海信日立空调系统有限公司 | A kind of adjusting method and device of the backlight illumination of segment encode liquid crystal display |
| CN112750404A (en) * | 2019-10-30 | 2021-05-04 | 深圳Tcl数字技术有限公司 | Brightness adjusting circuit, method and display device of indicator light and backlight |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110720 Termination date: 20130902 |