CN105654912B - A kind of screen backlight control circuit and display device - Google Patents
A kind of screen backlight control circuit and display device Download PDFInfo
- Publication number
- CN105654912B CN105654912B CN201610148951.2A CN201610148951A CN105654912B CN 105654912 B CN105654912 B CN 105654912B CN 201610148951 A CN201610148951 A CN 201610148951A CN 105654912 B CN105654912 B CN 105654912B
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- China
- Prior art keywords
- screen
- control circuit
- driving chip
- photoelectrical coupler
- infrared
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/027—Arrangements or methods related to powering off a display
Abstract
A kind of screen backlight control circuit and display device, circuit include: infrared emission end, the front of the screen of display device are set to, for emitting infrared ray；Infrared receiver end is set to the front of the screen, for receiving the infrared ray being reflected back through the object before the screen, and output drive signal；Control circuit receives the backlight line work that the driving signal controls the screen, lights the lamp bar of the screen.By the shutdown for controlling the backlight circuit of power supply in complete machine with infrared induction mode, by the variation for detecting the infrared spectroscopy of human body, turn on automatically load, user is without departing from induction range, it will be continuously turned on, and after people leaves, turn off backlight route, the problem of screen for solving display device will not actively close when leaving unused, lead to energy waste.
Description
Technical field
The present invention relates to field of display, more particularly to a kind of screen backlight control circuit and display device.
Background technique
Liquid crystal display or the main power consuming portions of LCD TV complete machine are exactly screen article lamp at present, that is, light the line of lamp bar
Road be it is electrical in backlight drive route.When before user frameing out, will not usually actively close screen, the backlight of screen according to
It is old to light, larger waste can be generated, the requirement of environmental protection and energy saving is not met.
Summary of the invention
It is an object of that present invention to provide a kind of screen backlight control circuits, it is intended to solve display device screen it is idle when not
The problem of actively closing, lead to energy waste.
The present invention provides a kind of screen backlight control circuits, comprising:
Infrared emission end is set to the front of the screen of display device, for emitting infrared ray；
Infrared receiver end is set to the front of the screen, for receiving the institute being reflected back through the object before the screen
State infrared ray, and output drive signal；
Control circuit receives the backlight line work that the driving signal controls the screen, lights the lamp of the screen
Item.
Preferably, the infrared emission end is set to the positive frame of the screen.
Preferably, the infrared receiver end is set to the positive frame of the screen.
Preferably, the infrared receiver end included filter and CCD detector, and the filter of crossing is being set to the screen just
The surface of the frame in face, the CCD detector be set in the frame it is opposite with the mistake filter, and with the control circuit
Connection.
Preferably, the control circuit includes a photoelectrical coupler, a voltage regulation unit and a driving chip, in which:
The light emitting source input terminal of the photoelectrical coupler and the output end of the CCD detector, receive the driving signal,
The luminous source output terminal of the photoelectrical coupler is grounded by first resistor, the input termination of the light-receiving device of the photoelectrical coupler
One control level signal, the output end of the light-receiving device of the photoelectrical coupler is grounded by second resistance, and passes through 3rd resistor
Meet the first input end of the driving chip, the second input termination pwm signal of the driving chip, the driving chip and institute
State backlight connection；
The first input end for stating driving chip and the second input terminal are grounded by the voltage regulation unit.
The present invention also provides a kind of display device, including screen and screen backlight control circuit, the screen back are light-operated
Circuit processed includes:
Infrared emission end is set to the front of the screen of display device, for emitting infrared ray；
Infrared receiver end is set to the front of the screen, for receiving the institute being reflected back through the object before the screen
State infrared ray, and output drive signal；
Control circuit receives the backlight line work that the driving signal controls the screen, lights the lamp of the screen
Item.
Preferably, the infrared emission end is set to the positive frame of the screen.
Preferably, the infrared receiver end is set to the positive frame of the screen.
Preferably, the infrared receiver end included filter and CCD detector, and the filter of crossing is being set to the screen just
The surface of the frame in face, the CCD detector be set in the frame it is opposite with the mistake filter, and with the control circuit
Connection.
Preferably, the control circuit includes a photoelectrical coupler, a voltage regulation unit and a driving chip, in which:
The light emitting source input terminal of the photoelectrical coupler and the output end of the CCD detector, receive the driving signal,
The luminous source output terminal of the photoelectrical coupler is grounded by first resistor, the input termination of the light-receiving device of the photoelectrical coupler
One control level signal, the output end of the light-receiving device of the photoelectrical coupler is grounded by second resistance, and passes through 3rd resistor
Meet the first input end of the driving chip, the second input termination pwm signal of the driving chip, the driving chip and institute
State backlight connection；
The first input end for stating driving chip and the second input terminal are grounded by the voltage regulation unit.
Above-mentioned screen backlight control circuit and display device can be electric in complete machine by being controlled with infrared induction mode
The shutdown of the backlight circuit in source, the variation of the infrared spectroscopy by detecting human body, turn on automatically load, user is without departing from induction
Range will be continuously turned on, and after people leaves, turn off backlight route, and the screen for solving display device will not actively close when leaving unused,
The problem of leading to energy waste.
Detailed description of the invention
Fig. 1 is screen backlight control circuit module schematic diagram in present pre-ferred embodiments；
Fig. 2 is the screen construction schematic diagram of display device in present pre-ferred embodiments；
Fig. 3 is the structural schematic diagram of infrared ray transmitting and receiving part in screen backlight control circuit shown in Fig. 1；
Fig. 4 is the circuit diagram of control circuit in screen backlight control circuit shown in Fig. 1.
Specific embodiment
In order to which technical problems, technical solutions and advantageous effects to be solved by the present invention are more clearly understood, below in conjunction with
Accompanying drawings and embodiments, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
Fig. 1, Fig. 2 and Fig. 3 are please referred to, screen backlight control circuit includes infrared emission end in present pre-ferred embodiments
11, infrared receiver end 12 and control circuit 13.
Infrared emission end 11 is set to the front of the screen 20 of display device, for emitting infrared ray 112；Infrared receiver end
12 are set to the front of the screen 20, for receiving the infrared ray 112 being reflected back through the object 30 before the screen 20,
And output drive signal (referring to Fig. 3)；Control circuit 13 receives the backlight route 21 that the driving signal controls the screen 20
Work, lights the lamp bar of the screen 20.
Preferably, Fig. 2 and Fig. 3 are please referred to, the infrared emission end 11 is set to the positive frame 22 of the screen 20.Institute
It states infrared receiver end 12 and is set to the positive frame 22 of the screen 20.Specifically, infrared emission end 11 and infrared receiver end 12
Direction and screen 20 towards identical.
Preferably, the infrared receiver end 12 included filter 122 and CCD detector 124, and the filter 122 of crossing is arranged
In the surface of the positive frame 22 of the screen 20, the CCD detector 124 is set in the frame 22 and crosses filter with described
122 is opposite, and connect with the control circuit 13.
Preferably, referring to Fig. 4, the control circuit 13 includes a photoelectrical coupler 131, a voltage regulation unit 132 and one
Driving chip 133.
The output end of the light emitting source input terminal of the photoelectrical coupler 131 and the CCD detector 124, receives the drive
Dynamic signal, the luminous source output terminal of the photoelectrical coupler 131 are grounded by first resistor R1, the photoelectrical coupler 131
The one control level signal PSON of input termination of light-receiving device, the output end of the light-receiving device of the photoelectrical coupler 131 pass through second
Resistance R2 ground connection, and connect by 3rd resistor R3 the first input end of the driving chip 133, the of the driving chip 133
Two input termination pwm signals, the driving chip 133 are connect with the backlight route 21；It is described to state the first of driving chip 133
Input terminal and the second input terminal are grounded by the voltage regulation unit 132.
When object is near infrared region, the transmitting light of infrared ray transmitting terminal 11 detects object, then reflection light
It is emitted in CCD detector 124 (integrated circuit processor) by filter 122, signal after treatment, emits a signal and arrives
13 receiving end of control circuit, receiving end receive order and export the foot that a voltage is given to optocoupler 131 by amplification treatment circuit,
1.2 foot induction of signal of optocoupler 131 are turned it on to 3.4 foot of optocoupler, and 3 foot of optocoupler is connection control level signal PSON signal
(high level), after conducting high level voltage flow to 4 foot of optocoupler by first resistor R1 to driving chip 133 first input end,
Because receiving pwm signal always before the second input termination pwm signal of driving chip 133, present first input end is being added
It is high level, backlight route 21 is started to work, and lamp bar is lighted, i.e. backlight is bright, otherwise backlight is extinguished.
In the present embodiment, driving chip 133 can be constant-current driven chip, and first input end can be triggering end, when connecing
When receiving the trigger signal of high level, driving chip 133 drives backlight route 21 to work.
Above-mentioned screen backlight control circuit can by controlled with infrared induction mode power supply in complete machine backlight electricity
The shutdown on road, the variation of the infrared spectroscopy by detecting human body, turn on automatically load, user will hold without departing from induction range
Continued access is logical, after people leaves, turns off backlight route, and the screen for solving display device will not actively close when leaving unused, and leads to the energy
The problem of waste.
In addition, please refer to Fig. 1-4, also disclosing a kind of display device includes 20 backlight control circuit of screen 20 and screen
13,20 backlight control circuit 13 of screen includes:
Infrared emission end 11 is set to the front of the screen 20 of display device, for emitting infrared ray 112；
Infrared receiver end 12 is set to the front of the screen 20, for receiving through the object reflection before the screen 20
The infrared ray 112 returned, and output drive signal；
Control circuit 13 receives the work of backlight route 21 that the driving signal controls the screen 20, lights the screen
The lamp bar of curtain 20.
Preferably, the infrared emission end 11 is set to the positive frame 22 of the screen 20.
Preferably, the infrared receiver end 12 is set to the positive frame 22 of the screen 20.
Preferably, the infrared receiver end 12 included filter 122 and CCD detector 124, and the filter 122 of crossing is arranged
In the surface of the positive frame 22 of the screen 20, the CCD detector 124 is set in the frame 22 and crosses filter with described
122 is opposite, and connect with the control circuit 13.
Preferably, the control circuit 13 includes a photoelectrical coupler 131, a voltage regulation unit 132 and a driving chip
133。
The output end of the light emitting source input terminal of the photoelectrical coupler 131 and the CCD detector 124, receives the drive
Dynamic signal, the luminous source output terminal of the photoelectrical coupler 131 are grounded by first resistor R1, the photoelectrical coupler 131
The one control level signal PSON of input termination of light-receiving device, the output end of the light-receiving device of the photoelectrical coupler 131 pass through second
Resistance R2 ground connection, and connect by 3rd resistor R3 the first input end of the driving chip 133, the of the driving chip 133
Two input termination pwm signals, the driving chip 133 are connect with the backlight route 21；It is described to state the first of driving chip 133
Input terminal and the second input terminal are grounded by the voltage regulation unit 132.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (6)
1. a kind of screen backlight control circuit characterized by comprising
Infrared emission end is set to the front of the screen of display device, for emitting infrared ray；
Infrared receiver end is set to the front of the screen, for receive be reflected back through the object before the screen it is described red
Outside line, and output drive signal；
Control circuit receives the backlight line work that the driving signal controls the screen, lights the lamp bar of the screen；
The infrared receiver end included filter and CCD detector, and the filter of crossing is set to the positive frame of the screen
Surface, it is interior opposite with the filter excessively that the CCD detector is set to the frame, and connect with the control circuit；
The control circuit includes a photoelectrical coupler, a voltage regulation unit and a driving chip, in which:
The light emitting source input terminal of the photoelectrical coupler and the output end of the CCD detector, receive the driving signal, described
The luminous source output terminal of photoelectrical coupler is grounded by first resistor, one control of input termination of the light-receiving device of the photoelectrical coupler
The output end of level signal processed, the light-receiving device of the photoelectrical coupler is grounded by second resistance, and meets institute by 3rd resistor
State the first input end of driving chip, the second input termination pwm signal of the driving chip, the driving chip and the back
Optical link connection；
The first input end for stating driving chip and the second input terminal are grounded by the voltage regulation unit.
2. screen backlight control circuit as described in claim 1, which is characterized in that the infrared emission end is set to the screen
The positive frame of curtain.
3. screen backlight control circuit as described in claim 1, which is characterized in that the infrared receiver end is set to the screen
The positive frame of curtain.
4. a kind of display device, including screen, which is characterized in that further include screen backlight control circuit, the screen back is light-operated
Circuit processed includes:
Infrared emission end is set to the front of the screen of display device, for emitting infrared ray；
Infrared receiver end is set to the front of the screen, for receive be reflected back through the object before the screen it is described red
Outside line, and output drive signal；
Control circuit receives the backlight line work that the driving signal controls the screen, lights the lamp bar of the screen；
The infrared receiver end included filter and CCD detector, and the filter of crossing is set to the positive frame of the screen
Surface, it is interior opposite with the filter excessively that the CCD detector is set to the frame, and connect with the control circuit；
The control circuit includes a photoelectrical coupler, a voltage regulation unit and a driving chip, in which:
The light emitting source input terminal of the photoelectrical coupler and the output end of the CCD detector, receive the driving signal, described
The luminous source output terminal of photoelectrical coupler is grounded by first resistor, one control of input termination of the light-receiving device of the photoelectrical coupler
The output end of level signal processed, the light-receiving device of the photoelectrical coupler is grounded by second resistance, and meets institute by 3rd resistor
State the first input end of driving chip, the second input termination pwm signal of the driving chip, the driving chip and the back
Optical link connection；
The first input end for stating driving chip and the second input terminal are grounded by the voltage regulation unit.
5. display device as claimed in claim 4, which is characterized in that it is positive that the infrared emission end is set to the screen
Frame.
6. display device as claimed in claim 4, which is characterized in that it is positive that the infrared receiver end is set to the screen
Frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610148951.2A CN105654912B (en) | 2016-03-16 | 2016-03-16 | A kind of screen backlight control circuit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610148951.2A CN105654912B (en) | 2016-03-16 | 2016-03-16 | A kind of screen backlight control circuit and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105654912A CN105654912A (en) | 2016-06-08 |
| CN105654912B true CN105654912B (en) | 2019-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610148951.2A Active CN105654912B (en) | 2016-03-16 | 2016-03-16 | A kind of screen backlight control circuit and display device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106371548B (en) * | 2016-08-31 | 2019-03-05 | 深圳市创凯智能股份有限公司 | Display screen energy-saving control method and device |
| CN107507592B (en) * | 2017-09-06 | 2020-01-07 | 京东方科技集团股份有限公司 | Display device and control method thereof |
| CN107770466B (en) * | 2017-11-06 | 2019-12-17 | 青岛海信激光显示股份有限公司 | Laser television |
| CN108766371A (en) * | 2018-07-04 | 2018-11-06 | 惠州市德赛西威汽车电子股份有限公司 | A kind of the intelligent backlight control system and its method of touch panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101515195A (en) * | 2009-03-09 | 2009-08-26 | 深圳华为通信技术有限公司 | Method for controlling shutting of display device backlight and device thereof |
| CN102038470A (en) * | 2009-10-09 | 2011-05-04 | 泰怡凯电器(苏州)有限公司 | Automatic-moving ground treatment robot and ground-abutting treatment control method thereof |
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| CN105654912A (en) | 2016-06-08 |
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