CN101710483A - Display adjusting brightness according to display distance - Google Patents
Display adjusting brightness according to display distance Download PDFInfo
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- CN101710483A CN101710483A CN200910221051A CN200910221051A CN101710483A CN 101710483 A CN101710483 A CN 101710483A CN 200910221051 A CN200910221051 A CN 200910221051A CN 200910221051 A CN200910221051 A CN 200910221051A CN 101710483 A CN101710483 A CN 101710483A
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Abstract
The invention discloses a display adjusting the brightness according to a display distance, which comprises a liquid crystal module, a sensor, a switch gain circuitry, a microcontroller and a brightness controller, wherein the liquid crystal module comprises a display panel and a backlight module and the display panel is used for displaying images according to the light of the backlight module; the sensor is arranged on one side of the liquid crystal module and is used for generating a sense signal according to the distance between the backlight module and a user; the switch gain circuitry is coupled with the sensor and is used for comparing the sense signal with a plurality of gain values so as to output a measuring voltage; the microcontroller is coupled with the switch gain circuitry and is used for determining the distance between the liquid crystal module and the user according to the measuring voltage; and the brightness controller is coupled with the microcontroller and the liquid crystal module and is used for adjusting the brightness of the display panel according to the distance, which is determined by the microcontroller, between the liquid crystal module and the user,. Because the display of the invention can automatically detect the relative distance between a relatively distant moving object and the liquid crystal module, the display has the characteristic which is not possessed by the traditional liquid crystal module using a sensing element.
Description
Technical field
The present invention relates to a kind of flat-panel screens of brightness-adjusting, relate in particular to a kind of flat-panel screens of adjusting brightness according to range of a signal.
Background technology
Function advanced person's display gradually becomes the valuable feature of consumption electronic product now, and wherein LCD has been various electronic equipments such as TV, mobile phone, PDA(Personal Digital Assistant), digital camera, computer screen or the widespread use of notebook computer screen institute gradually.
Yet be applied to the large scale liquid crystal module of LCD TV, computer screen or notebook computer screen, its power consumption can along with the increase of Liquid Crystal Module size or brightness increases and power consumption is obviously increased, and the increase of power consumption simultaneously can derive more thermal energy.Have the problem of image retention when in addition, Liquid Crystal Module is presented at same picture for a long time.Above problem mainly all follows the backlight of large scale liquid crystal module that sizable relation is arranged, and will be an important problem so control adjustment brightness backlight.
In the present display, it mainly is the distance of utilizing Photosensing Units sensing user distance display curtain, or after utilizing the distance of digital camera module analysis user distance display curtain, adjust backlight illumination again, for example No. the 271686th, TaiWan, China patent announcement is with shown in No. 273818 patent.But concerning using Photosensing Units as the display of sensor, once the distance of user's distance display curtain is far away, then the error of sensing effect also can increase.Concerning using digital camera module as the display of sensor, the sensing of relative distance comparatively complexity and cost is higher.Therefore neither be fit to solve the relevant issues that the large scale liquid crystal module is run into.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of display of adjusting brightness according to range of a signal, it utilizes sensor and collocation to be used for detecting automatically the relative position algorithm of moving article apart from Liquid Crystal Module, can detect the relative position of moving article far away automatically, to solve prior art problems apart from Liquid Crystal Module.
According to the present invention, a kind of display according to range of a signal adjustment brightness, it comprises Liquid Crystal Module, sensor, turn off gain circuit, microcontroller and brightness controller.This Liquid Crystal Module comprises display panel and backlight module, and this display panel is used for according to the light display image of this backlight module.This sensor is installed on a side of this display panel, is used for producing sensing signal according to this Liquid Crystal Module and user's distance.This turn off gain circuit is coupled to this sensor, is used for this sensing signal and a plurality of yield value are compared with the output measuring voltage.This microcontroller couples this turn off gain circuit, is used for determining according to this measuring voltage this Liquid Crystal Module and user's distance.This brightness controller is coupled to this microcontroller and this Liquid Crystal Module, is used for the Liquid Crystal Module that determines according to this microcontroller and user's distance to adjust the brightness of display panel.
According to the present invention, this brightness controller comprises a plurality of brightness adjusted values, the corresponding yield value of each brightness adjusted value, when this microcontroller judged that this Liquid Crystal Module and user's distance meets wherein a yield value, then this brightness controller was adjusted the brightness of this Liquid Crystal Module according to the brightness adjusted value of correspondence.
According to the present invention, display comprises a level translation circuit in addition, is coupled between this turn off gain circuit and this sensor, is used for promoting the voltage level of this sensing signal.
According to the present invention, this sensor is a microwave sensing device, an infrared sensor or a ultrasonic sensing method.
According to the present invention, this turn off gain circuit comprises operational amplifier and commutation circuit.This operational amplifier comprises an input end and an output terminal, is used for when this sensing signal of this input end meets a yield value of described a plurality of yield values, meets the measuring voltage of this yield value in this output terminal output.This commutation circuit is coupled to this output terminal of this operational amplifier, is used for adjusting according to the measuring voltage of this output terminal a yield value of described a plurality of yield values.When the level of this sensing signal surpasses a yield value, this commutation circuit improves the yield value of choosing.When the level of this sensing signal is lower than a yield value, this commutation circuit reduces the yield value of choosing.
Display of the present invention utilizes sensor to detect dynamically moving of user, and utilizes the turn off gain circuit to cooperate microcontroller to calculate the distance of user with respect to Liquid Crystal Module, dynamically adjusts the brightness that Liquid Crystal Module shows according to this.Thus, the user can obtain one and more comfortable view and admire brightness, and Liquid Crystal Module also can be realized purpose of energy saving by adjusting brightness.In addition, machine dims brightness a bit in due course, and power consumption is a little less, and the problem that then increases unnecessary heat energy just can be alleviated, and by this protection mechanism, can reach the effect of protection Liquid Crystal Module.More because the problem of heat energy obtains to alleviate, then the problem of image retention also can be improved.Another benefit of the present invention is and can adjusts different display frame by the situation of user apart from the Liquid Crystal Module different distance that then the problem of image retention also can be improved.Because display of the present invention utilizes sensor and detects the relative position algorithm of moving article apart from Liquid Crystal Module automatically, especially can detect the relative position of moving article far away automatically, therefore have the unexistent characteristics of Liquid Crystal Module that tradition is used sensing element apart from Liquid Crystal Module.
For foregoing of the present invention can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 is the functional-block diagram of display of the present invention.
Fig. 2 is the circuit diagram of the turn off gain circuit of Fig. 1.
Fig. 3 is the example of brightness value, yield value and user's distance.
Description of reference numerals in the above-mentioned accompanying drawing is as follows:
10 displays, 12 Liquid Crystal Modules
14 sensors, 16 turn off gain circuit
18 microcontrollers, 20 brightness controllers
22 level translation circuit, 162 operational amplifiers
164 commutation circuits, 122 display panels
124 backlight modules
Embodiment
See also Fig. 1, Fig. 1 is the functional-block diagram of display 10 of the present invention.Display 10 comprises a Liquid Crystal Module 12, a sensor 14, a turn off gain circuit 16, a level translation circuit 22, a microcontroller 18 and a brightness controller 20.Liquid Crystal Module 12 comprises display panels 122 and backlight module 124, and display panels 122 is used for the light display image that sends according to backlight module 124.Sensor 14 is installed on a side of Liquid Crystal Module 12, and it can be microwave sensing device, infrared sensor or ultrasonic sensing method.The transmitting terminal of sensor 14 can be towards Liquid Crystal Module 12 towards the user direction launched microwave, infrared ray or Boeing ripple, behind the microwave that emits, infrared ray or Boeing ripple contact object, promptly can reflect and receive by the receiving end of sensor 14.The receiving end of sensor 14 will produce a sensing signal according to microwave, infrared ray or the Boeing ripple of reflection.Level translation circuit 22 is coupled between turn off gain circuit 16 and the sensor 14, is used for promoting and strengthening the voltage level of this sensing signal.Turn off gain circuit 16 is used for this sensing signal and a plurality of yield value are compared to export a measuring voltage.Microcontroller 18 couples turn off gain circuit 16, is used for according to the distance of this measuring voltage decision Liquid Crystal Module 12 with the user.Microcontroller 18 can be one 8 bit microprocessor or simple arithmetic operation unit.Brightness controller 20 is coupled to microcontroller 18 and Liquid Crystal Module 12, is used for the Liquid Crystal Module 12 that determined according to microcontroller 18 and user's distance to adjust the brightness of Liquid Crystal Module 12.And can utilize between brightness controller 20 and the microcontroller 18 transmission interface commonly used such as RS-232, I2C, GPRS and network with main system (for example: the PID system) link.
See also Fig. 2, Fig. 2 is the circuit diagram of the turn off gain circuit 16 of Fig. 1.Turn off gain circuit 16 comprises an operational amplifier 162 and and switches circuit 164.Operational amplifier 162 comprises an input end VIN and an output terminal VOUT, is used for when this sensing signal of this input end VIN meets a yield value of described a plurality of yield values, meets the measuring voltage of this yield value in this output terminal VOUT output.Microcontroller 18 is coupled to commutation circuit 164, and microcontroller 18 is used for according to a yield value of the described a plurality of yield values of measuring voltage control commutation circuit 164 adjustment of this output terminal VOUT.When the level of this sensing signal surpasses a yield value, commutation circuit 164 improves the yield value of choosing; Otherwise when the level of this sensing signal is lower than a yield value, commutation circuit 164 reduces the yield value of choosing.Brightness controller 20 is then stored a plurality of brightness adjusted values, the corresponding yield value of each brightness adjusted value, when microcontroller 18 judged that Liquid Crystal Modules 12 and user's distance meets wherein a yield value, then brightness controller 20 can give backlight module 124 with the brightness adjusted value output of correspondence according to the yield value that meets.Finally, backlight module 124 is exactly the brightness of adjusting Liquid Crystal Module 12 according to the brightness adjusted value.
See also Fig. 3, Fig. 3 is the example of brightness value, yield value and user's distance.In order to be described in more detail operation of the present invention, below will illustrate, but as understanding those of ordinary skills, can adjust according to deviser's demand about the numerical value change of user's distance and corresponding brightness value, the numerical value with present embodiment does not exceed.The default light luminance value of backlight module 124 emissions at the beginning is 100%.When the distance of user's distance display panel 122 in 5 meters, sensor 14 receiving ends receive reflection from user's microwave, infrared ray or Boeing ripple and produce a sensing signal.The operational amplifier 162 of turn off gain circuit 16 can compare the level and first yield value of this sensing signal.Because this moment, the sensing signal level can be lower than first yield value (because of first yield value corresponds to brightness value 100%), so the measuring voltage that commutation circuit 164 is understood according to the output terminal VOUT of operational amplifier 162 will be adjusted to second yield value (second yield value corresponds to brightness value 80%) under the yield value.But the sensing signal level still is lower than second yield value, so commutation circuit 164 can be adjusted to the 3rd yield value (the 3rd yield value corresponds to brightness value 70%) under the measuring voltage according to output terminal VOUT.At this moment, operational amplifier 162 can judge that the sensing signal level conforms to the 3rd yield value, is 70% so brightness controller 20 can be adjusted its brightness value according to measuring voltage, and this brightness value is delivered to backlight module 164.And backlight module 164 will be adjusted downward to 70% by default 100% with the light luminance of emission.If next the user steps back distance display panel 12 22 meters distant arranged, then turn off gain circuit 16 can be according to above-mentioned pattern, judging the sensing signal level in the mode of poll (polling) conforms to the 4th yield value, so it is 0% that brightness controller 20 can be adjusted its brightness value according to measuring voltage, and this brightness value is delivered to backlight module 164.And backlight module 164 will be adjusted downward to 0% by 70% with the light luminance of emission.By such mechanism, the distance of user's distance display panel 12 is near more, and then the light luminance that provided of backlight module 164 is less on the contrary, and does not need to keep normal 100% brightness value always.But hypertelorism when user's distance display panel 12, expression does not have the user using display 10, so backlight module 164 meetings time-out earlier provide light and present complete black picture with the saving power loss, or present full picture in vain to attract and to remind the user to note.In brief, display 10 of the present invention can be designed to make apart from the distance of Liquid Crystal Module according to the audience brightness of image of Liquid Crystal Module 12 automatic switchover demonstrations in order to attract audience's sight.
Note that sensor 14 meetings signals such as launched microwave, infrared ray or Boeing ripple regularly are to detect user's distance.Turn off gain circuit 16, level translation circuit 22, microcontroller 18 and brightness controller 20 then are just operations when sensor 14 has operation, to save the consume of electric power.
Compared to prior art, display of the present invention utilizes sensor to detect dynamically moving of user, and utilizes the turn off gain circuit to cooperate microcontroller to calculate the distance of user with respect to Liquid Crystal Module, dynamically adjusts the brightness that Liquid Crystal Module shows according to this.Thus, the user can obtain one and more comfortable view and admire brightness, and Liquid Crystal Module also can be realized purpose of energy saving by adjusting brightness.In addition, machine dims brightness a bit in due course, and power consumption is a little less, and the problem that then increases unnecessary heat energy just can be alleviated, and by this protection mechanism, can reach the effect of protection Liquid Crystal Module.More because the problem of heat energy obtains to alleviate, then the problem of image retention also can be improved.Another benefit of the present invention is and can adjusts different display frame by the situation of user apart from the Liquid Crystal Module different distance that then the problem of image retention also can be improved.Because display of the present invention utilizes sensor and detects the relative position algorithm of moving article apart from Liquid Crystal Module automatically, especially can detect the relative position of moving article far away automatically, therefore have the unexistent characteristics of Liquid Crystal Module that tradition is used sensing element apart from Liquid Crystal Module.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any those of ordinary skills; without departing from the spirit and scope of the present invention; when can doing various changes and modification, so protection scope of the present invention is as the criterion when looking appended the scope that claim defined.
Claims (9)
1. adjust the display of brightness according to range of a signal for one kind, it comprises:
One Liquid Crystal Module comprises a display panel and a backlight module, and this display panel is used for according to the light display image of this backlight module;
One sensor is installed on a side of this display panel, is used for producing a sensing signal according to this display panel and a user's distance;
One turn off gain circuit is coupled to this sensor, is used for this sensing signal and a plurality of yield value are compared to export a measuring voltage;
One microcontroller couples this turn off gain circuit, is used for determining according to this measuring voltage this display panel and this user's distance; And
One brightness controller is coupled to this microcontroller and this Liquid Crystal Module, and this display panel that is used for determining according to this microcontroller and this user's distance is adjusted the brightness of this display panel.
2. display as claimed in claim 1, wherein this brightness controller comprises a plurality of brightness adjusted values, the corresponding yield value of each brightness adjusted value, when this microcontroller judged that this Liquid Crystal Module and user's distance meets wherein a yield value, then this brightness controller was adjusted the brightness of this Liquid Crystal Module according to the brightness adjusted value of correspondence.
3. display as claimed in claim 1, it comprises a level translation circuit in addition, is coupled between this turn off gain circuit and this sensor, is used for promoting the voltage level of this sensing signal.
4. display as claimed in claim 1, wherein this sensor is a microwave sensing device, an infrared sensor or a ultrasonic sensing method.
5. display as claimed in claim 1, wherein this turn off gain circuit comprises:
One operational amplifier, it comprises an input end and an output terminal, is used for when this sensing signal of this input end meets a yield value of described a plurality of yield values, meets the measuring voltage of this yield value in this output terminal output; And
One switches circuit, is coupled to this output terminal of this operational amplifier, is used for adjusting according to the measuring voltage of this output terminal a yield value of described a plurality of yield values.
6. display as claimed in claim 5, wherein the level when this sensing signal surpasses a yield value, and this commutation circuit improves the yield value of choosing.
7. display as claimed in claim 5, wherein the level when this sensing signal is lower than a yield value, and this commutation circuit reduces the yield value of choosing.
8. display as claimed in claim 1, wherein this display panel shows a complete white picture during greater than a preset value in this display panel that this microcontroller determined and this user's distance.
9. display as claimed in claim 1, wherein this display panel shows a complete black picture during greater than a preset value in this display panel that this microcontroller determined and this user's distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910221051A CN101710483A (en) | 2009-11-09 | 2009-11-09 | Display adjusting brightness according to display distance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910221051A CN101710483A (en) | 2009-11-09 | 2009-11-09 | Display adjusting brightness according to display distance |
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| CN101710483A true CN101710483A (en) | 2010-05-19 |
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| CN200910221051A Pending CN101710483A (en) | 2009-11-09 | 2009-11-09 | Display adjusting brightness according to display distance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106131311A (en) * | 2016-06-21 | 2016-11-16 | 广东欧珀移动通信有限公司 | Adjust the method for screen backlight brightness, device and the mobile terminal of mobile terminal |
| CN111198470A (en) * | 2018-10-30 | 2020-05-26 | 中强光电股份有限公司 | Projection system, driving device and driving method |
-
2009
- 2009-11-09 CN CN200910221051A patent/CN101710483A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106131311A (en) * | 2016-06-21 | 2016-11-16 | 广东欧珀移动通信有限公司 | Adjust the method for screen backlight brightness, device and the mobile terminal of mobile terminal |
| CN106131311B (en) * | 2016-06-21 | 2017-08-25 | 广东欧珀移动通信有限公司 | Adjust the method, device and mobile terminal of the screen backlight brightness of mobile terminal |
| CN111198470A (en) * | 2018-10-30 | 2020-05-26 | 中强光电股份有限公司 | Projection system, driving device and driving method |
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Application publication date: 20100519 |