CN206097872U - Display screen back of body light control system and electronic equipment - Google Patents
Display screen back of body light control system and electronic equipment Download PDFInfo
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- CN206097872U CN206097872U CN201621088361.7U CN201621088361U CN206097872U CN 206097872 U CN206097872 U CN 206097872U CN 201621088361 U CN201621088361 U CN 201621088361U CN 206097872 U CN206097872 U CN 206097872U
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Abstract
The utility model relates to an electronic equipment field especially relates to a display screen back of body light control system and electronic equipment. The display screen is carried on the back light control system and is included backlight driving chip, boost circuit, distance measuring sensor, singlechip and LED circuit, and backlight driving chip includes and be used for controlling messenger's ability pin in a poor light that distance measuring sensor is connected with the singlechip, and singlechip and messenger's ability pin connection, singlechip are used for drawing high or draw the current potential that hangs down messenger's ability pin according to distance measuring sensor's measuring result. Electronic equipment includes above -mentioned display screen back of the body light control system. On the one hand, determine being shaded of display screen according to the actual position of barrier and whether close, need not to wait for one period set time of preset, and then practiced thrift the energy consumption, on the other hand predicts needs in advance according to the actual position of barrier and makes the display screen light, and the user just need not wait for that electronic equipment opens the required time once more like this, facilitates more to the user to save time.
Description
Technical field
This utility model is related to electronic device field, more particularly to a kind of display backlight control system and with the display
The electronic equipment of screen backlight control system.
Background technology
Fig. 1 is the circuit diagram of prior art backlight control circuit, and with reference to Fig. 1, backlight control circuit includes backlight drive core
Piece (by taking RT8532 as an example), booster circuit and LED circuit.Wherein, there is LX pins, OVP pins, multiple in backlight driving chip
LED pipe foot (in this example be six), VIN pins, EN pins (i.e. enable pin), PWM pins, MIX pins, COMP pins,
ISET pins, FREQ pins, AGND pins and PGND pins；Booster circuit is made up of power inductance L1, diode D1；LED is electric
Route multigroup LED compositions in parallel.LX pins are connected with booster circuit, and are connected with LED circuit, to provide stable output electricity
Pressure.LED circuit is connected with LED pipe foot.AGND and PGND ends are grounded.COMP outer meeting resistance RCOMP, electric capacity CCAnd CCOMPThe benefit of composition
Circuit is repaid, when responding for dynamic regulation booster circuit is compensated.ISET pins are via resistance RISETAfter be grounded, for arranging LED
Electric current.FREQ pin Jing resistance RFSWAfter be grounded, for arrange switch frequency.PWM port is received from outside (digital signal)
Pwm signal (PWM Signal), and receive the electric current that can be adjusted to after pwm signal needed for itself.VIN ends and unidirectional current
Pressure VINConnection is with to chip power supply, and Jing electric capacity CINAfter be grounded so that voltage stabilization.OVP pins and resistance ROVP1、ROVP2With
Electric capacity COVPThe overvoltage crowbar connection of composition, plays a part of overvoltage protection.MIX pins are used for the selection of light-modulating mode.Electricity
What the voltage of the enable pin for being opened by control display screen backlight of sub- device display screen was carried out, when drawing high enable pin
During voltage, backlight is bright；When the voltage of enable pin is dragged down, backlight is gone out.
At present, electronic equipment display screen need to after one section of Preset Time could auto sleep, never use dormancy this
The section time can cause the waste of a large amount of electric energy；After electronic equipment dormancy, electronic equipment is reused if desired, then user needs
Switch is reopened, electronic equipment is again turned on needing this period user to wait.
Utility model content
The purpose of this utility model is the display backlight control system and electronic equipment for proposing a kind of energy efficient.
It is that, up to this purpose, this utility model is employed the following technical solutions：
On the one hand this utility model provides a kind of display backlight control system, including backlight driving chip, booster circuit
And LED circuit, the backlight driving chip includes enable pin, distance measuring sensor and the single-chip microcomputer for controlling backlight, institute
State distance measuring sensor to be connected with the single-chip microcomputer, the single-chip microcomputer is connected with the enable pin, the single-chip microcomputer is used for basis
The measurement result of the distance measuring sensor is drawing high or drag down the current potential of the enable pin.
Preferably, the distance measuring sensor is infrared distance sensor.
Preferably, the infrared distance sensor includes for launching ultrared infrared transmitting tube, being hindered for receiving
Hinder ultrared position sensitive detectors that thing reflects and for calculating the distance of the barrier and to be converted to magnitude of voltage defeated
The counting circuit for going out：The infrared transmitting tube and the position sensitive detectors are electrically connected with the counting circuit.
Preferably, the driving pin of the backlight driving chip is connected with the booster circuit, the booster circuit and institute
State LED circuit connection, the single-chip microcomputer arranges predeterminated voltage, when the magnitude of voltage be all higher than in the first Preset Time it is described pre-
If during voltage, the current potential of the enable pin is high level, turn on the LED circuit, when the magnitude of voltage is preset second
When being respectively less than the predeterminated voltage in the time, the current potential of the enable pin is low level, disconnects the LED circuit.
Preferably, the distance measuring sensor has the signal transmitting terminal for output voltage signal；The single-chip microcomputer includes
Analog-digital converter, the signal that the analog-digital converter has the voltage signal for receiving the distance measuring sensor output is received
End, the signal receiving end is connected with the signal transmitting terminal.
On the other hand this utility model also provides a kind of electronic equipment, including display screen and above-mentioned display backlight control
System, the display screen controls backlight by the display backlight control system.
Preferably, the display screen is coated on the display screen housing of periphery, and the display screen housing offers direction
Through hole in front of the display screen, the distance measuring sensor prevents the distance measuring sensor to be blocked towards the through hole.
Preferably, the end face of the through hole is provided with transparent coating.
Preferably, the electronic equipment is computer, TV or mobile phone.
Above-mentioned technical proposal of the present utility model has the advantage that：
Display backlight control system of the present utility model, including backlight driving chip, booster circuit, distance measuring sensor,
Single-chip microcomputer and LED circuit, the backlight driving chip includes the enable pin for controlling backlight, the distance measuring sensor and institute
Single-chip microcomputer connection is stated, the single-chip microcomputer is connected with the enable pin, and the single-chip microcomputer is used for according to the distance measuring sensor
Measurement result is drawing high or drag down the current potential of the enable pin.After barrier (human body) is away from display screen certain distance, show
Display screen backlight can be automatically switched off；After barrier (human body) is close to apart from display screen certain distance, display backlight can be automatic
Light.Thus, on the one hand, whether the backlight that display screen is judged according to the physical location of barrier (human body) closes, without the need for etc.
Treat the time set in advance, and then power consumption is reduced；On the other hand, predicted in advance according to the physical location of barrier (human body)
To needing to light display screen, such user is just again turned on the required time without waiting for electronic equipment (such as computer), right
Save time in user's more facility.Meanwhile, the electronic equipment with above-mentioned display backlight control system of the present utility model, the electricity
Sub- equipment being capable of energy efficient.
Description of the drawings
Fig. 1 is the circuit diagram of prior art backlight control circuit；
Fig. 2 is the structural representation using one embodiment of display backlight control system of the present utility model；
Fig. 3 is the structural representation of the GP2D12 infrared distance sensors of Japanese SHARP companies production；
Fig. 4 is output voltage and obstacle distance relation schematic diagram；
Fig. 5 is the schematic diagram that the single-chip microcomputer of the display backlight control system in Fig. 2 compares output voltage and predeterminated voltage,
Illustrated therein is the situation for needing to close display backlight；
Fig. 6 is the schematic diagram that the single-chip microcomputer of the display backlight control system in Fig. 2 compares output voltage and predeterminated voltage,
Illustrated therein is the situation for needing to open display backlight.
In figure：
1：Backlight driving chip；11：Enable pin；2：Distance measuring sensor；3：Single-chip microcomputer；ΔT1：First Preset Time；Δ
T2：Second Preset Time；Vout：The output voltage of infrared distance sensor；L：Barrier is with a distance from infrared distance sensor；
V0：Predeterminated voltage.
Specific embodiment
Further illustrate the technical solution of the utility model below in conjunction with the accompanying drawings and by specific embodiment.
Embodiment one
Fig. 2 is the structural representation using one embodiment of display backlight control system of the present utility model, specifically
Ground, with reference to Fig. 2, in this example it is shown that screen backlight control system include backlight driving chip 1, booster circuit, LED circuit,
Distance measuring sensor 2 and single-chip microcomputer 3.The driving pin of backlight driving chip 1 is connected with booster circuit, booster circuit and LED circuit
Connection, backlight driving chip 1 includes enable pin 11, and enable pin 11 is used to control the closing and unlatching of backlight, manages when enabling
When the current potential of foot 11 is driven high, LED circuit conducting, backlight are bright；When the current potential of enable pin 11 is pulled low, LED circuit shut-off,
Backlight is gone out.Wherein, distance measuring sensor 2 is connected with single-chip microcomputer 3, and single-chip microcomputer 3 is connected with enable pin 11.
After barrier (human body) is away from display screen certain distance, display backlight can be automatically switched off；As barrier (people
Body) close to after display screen certain distance, display backlight can be lighted automatically.Thus, on the one hand, according to barrier (people
Body) physical location whether close the backlight that judges display screen, without waiting for one section of set time set in advance, Jin Erjie
About energy consumption；On the other hand, being predicted in advance according to the physical location of barrier (human body) needs to light display screen, so uses
Family is just again turned on the required time without waiting for electronic equipment (such as computer), for user's more facility saves time.
Specifically, distance measuring sensor 2 is converted to for measuring barrier (human body) to the distance of display screen and by the distance
Magnitude of voltage is exported.In the present embodiment, distance measuring sensor 2 is infrared distance sensor 2, and the distance measuring sensor 2 includes infrared
Pipe, position sensitive detectors (PSD) and counting circuit are penetrated, infrared transmitting tube is used to launch infrared ray, and position sensitive detectors are used
In receiving by the infrared ray of barrier (human body) reflection, counting circuit calculates barrier (human body) according to the infrared ray of reflection
The distance is simultaneously converted to magnitude of voltage by distance.Infrared transmitting tube and position sensitive detectors are electrically connected with counting circuit.Range finding
Sensor 2 is installed on a display screen, and then can accurately measure the distance of barrier to display screen.
With reference to Fig. 3, the distance measuring sensor 2 of the present embodiment is passed using the GP2D12 infrared distance measurements of SHARP companies of Japan production
Sensor, counting circuit includes signal processing circuit, voltage regulator, oscillating circuit, output circuit and range-measuring circuit etc..Drive electricity
Road provides the driving voltage of infrared ray lampet (LED), and the infrared ray that PSD ends gather is carried out data processing simultaneously by signal processing circuit
Switch to voltage；Oscillating circuit produces the waveform needed for the element (such as square wave, triangular wave)；Output circuit is by prime and rear fraction
Open, make output impedance diminish, or the level range by required voltage amplification to needed for oneself, the electricity of output circuit final output
Pressure value is the magnitude of voltage of counting circuit output.
Specifically, it is the output voltage V of infrared distance sensor with reference to Fig. 4outWith barrier from infrared distance sensor
The relation apart from L.By taking computer display screen as an example, distance measuring sensor 2 is arranged on the display screen of computer.In general, with
When family uses computer, human body apart from computer display screen about 50cm, when after user stands up to leave to apart from computer display screen 60cm,
Output voltage is 0.5V.In the present embodiment, it is provided with predeterminated voltage V in single-chip microcomputer 30, single-chip microcomputer 3 is according to distance measuring sensor 2
Measurement result (magnitude of voltage for conveying) and predeterminated voltage comparative result drawing high or drag down the current potential of enable pin 11.Ginseng
According to Fig. 4, can be by the predeterminated voltage V in single-chip microcomputer 30It is set to 0.5V.
Specifically, in the present embodiment, with reference to Fig. 5, output voltage V of the single-chip microcomputer 3 in infrared distance sensoroutGreatly
In predeterminated voltage V0(0.5V) time continues to the first Preset Time Δ T1Afterwards, single-chip microcomputer 3 will draw high the electricity of enable pin 11
Position so that LED circuit is turned on, display backlight is bright；With reference to Fig. 6, output voltage V of the single-chip microcomputer 3 in infrared distance sensorout
Less than predeterminated voltage V0(0.5V) time continues to the second Preset Time Δ T2Afterwards, single-chip microcomputer 3 will drag down the electricity of enable pin 11
Position.First Preset Time Δ T1With the second Preset Time Δ T2Can be with equal, it is also possible to unequal, can be set according to practical situation
Fixed different value.
First Preset Time Δ T1With the second Preset Time Δ T2Can set to be prevented effectively from misrecognition, for example, first be preset
Time Δ T1With the second Preset Time Δ T2The several seconds is arranged on to several minutes, the use that will be passed by from before display screen can be effectively prevented
Family is identified as needing to open backlight, or is to need to close backlight by the user's identification for only leaving the water of falling cup before display screen.
Distance measuring sensor 2 has signal transmitting terminal, and the signal transmitting terminal is used for output voltage signal, and single-chip microcomputer 3 includes mould
Number converter, analog-digital converter has signal receiving end, and the signal receiving end is used to receive the voltage letter of the output of distance measuring sensor 2
Number, signal receiving end is connected with signal transmitting terminal, and then realizes the connection of distance measuring sensor 2 and single-chip microcomputer 3.Wherein, the connection
Can be wireless connection or wired connection.Distance measuring sensor 2 is also not limited to infrared distance sensor, can also be ultrasonic ranging
Sensor etc., as long as the distance measuring sensor with preferable precision can be with the range of several centimetres to several meters in measuring distance.
Embodiment two
The present embodiment provides a kind of electronic equipment of the display backlight control system with embodiment one, and electronic equipment can
Think computer, TV or mobile phone etc..The electronic equipment includes the display backlight control system of display screen and embodiment 1, shows
Shield and backlight is controlled by above-mentioned display backlight control system, can in time close display, energy efficient can also be in time
Opening display, saves the time, simplifies user operation.
Display screen is coated on the display screen housing of periphery, and display screen housing was offered towards leading in front of display screen
Hole, distance measuring sensor prevents distance measuring sensor to be blocked towards through hole.Through hole can be circular hole or other shapes, according to reality
Situation is arranged.When distance measuring sensor is infrared distance sensor, the end face of through hole can arrange transparent coating, such as transparent
Thin film or transparent plastic casing etc., neither stop infrared ray, do not affect range finding, can also protect infrared distance sensor,
In order to avoid affecting range accuracy, coating to try one's best thin and high transparency.
Know-why of the present utility model is described above in association with specific embodiment.These descriptions are intended merely to explain this reality
With new principle, and can not by any way be construed to the restriction to this utility model protection domain.Based on explanation herein,
Those skilled in the art associates other specific embodiments of the present utility model by need not paying performing creative labour,
These modes are fallen within protection domain of the present utility model.
Claims (9)
1. a kind of display backlight control system, including backlight driving chip (1), booster circuit and LED circuit, the backlight is driven
Dynamic chip (1) includes the enable pin (11) for controlling backlight, it is characterised in that also include：
Distance measuring sensor (2) and single-chip microcomputer (3), the distance measuring sensor (2) is connected with the single-chip microcomputer (3), the monolithic
Machine (3) is connected with the enable pin (11),
The single-chip microcomputer (3) according to the measurement result of the distance measuring sensor (2) for drawing high or drag down the enable pin
(11) current potential.
2. display backlight control system according to claim 1, it is characterised in that
The distance measuring sensor (2) is infrared distance sensor.
3. display backlight control system according to claim 2, it is characterised in that
The infrared distance sensor is included for launching ultrared infrared transmitting tube, for receiving by the red of barrier reflection
The position sensitive detectors of outside line and calculate the barrier distance and be converted to magnitude of voltage output counting circuit；It is described
Infrared transmitting tube and the position sensitive detectors are electrically connected with the counting circuit.
4. display backlight control system according to claim 3, it is characterised in that
The driving pin of the backlight driving chip (1) is connected with the booster circuit, the booster circuit and the LED circuit
Connection, the single-chip microcomputer (3) arranges predeterminated voltage, when the magnitude of voltage is all higher than the predeterminated voltage in the first Preset Time
When, the current potential of the enable pin (11) is high level, turns on the LED circuit, when the magnitude of voltage is when second is default
During the interior respectively less than predeterminated voltage, the current potential of the enable pin (11) is low level, turns off the LED circuit.
5. display backlight control system according to claim 4, it is characterised in that
The distance measuring sensor (2) is with the signal transmitting terminal for output voltage signal；
The single-chip microcomputer (3) includes analog-digital converter, and the analog-digital converter has reception distance measuring sensor (2) output
The signal receiving end of the voltage signal, the signal receiving end is connected with the signal transmitting terminal.
6. a kind of electronic equipment, it is characterised in that including the display backlight any one of display screen and claim 1-5
Control system, the display screen controls backlight by the display backlight control system.
7. electronic equipment according to claim 6, it is characterised in that the display screen is coated on the display screen of periphery
Housing, the display screen housing is offered towards the through hole in front of the display screen, the distance measuring sensor towards the through hole,
The distance measuring sensor is prevented to be blocked.
8. electronic equipment according to claim 7, it is characterised in that the end face of the through hole is provided with transparent covering
Layer.
9. the electronic equipment according to any one of claim 6-8, it is characterised in that the electronic equipment is computer, TV
Or mobile phone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621088361.7U CN206097872U (en) | 2016-09-28 | 2016-09-28 | Display screen back of body light control system and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621088361.7U CN206097872U (en) | 2016-09-28 | 2016-09-28 | Display screen back of body light control system and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206097872U true CN206097872U (en) | 2017-04-12 |
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ID=58481462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621088361.7U Active CN206097872U (en) | 2016-09-28 | 2016-09-28 | Display screen back of body light control system and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206097872U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107273829A (en) * | 2017-06-02 | 2017-10-20 | 云丁网络技术(北京)有限公司 | A kind of intelligent peephole gesture identification method and system |
| CN110136655A (en) * | 2019-04-08 | 2019-08-16 | 昆山龙腾光电有限公司 | Backlight driving system and display device |
-
2016
- 2016-09-28 CN CN201621088361.7U patent/CN206097872U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107273829A (en) * | 2017-06-02 | 2017-10-20 | 云丁网络技术(北京)有限公司 | A kind of intelligent peephole gesture identification method and system |
| CN110136655A (en) * | 2019-04-08 | 2019-08-16 | 昆山龙腾光电有限公司 | Backlight driving system and display device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215301 No. 1, Longteng Road, Kunshan Development Zone, Jiangsu, Suzhou Patentee after: Kunshan Longteng Au Optronics Co Address before: 215301 No. 1, Longteng Road, Kunshan Development Zone, Jiangsu, Suzhou Patentee before: Kunshan Longteng Optronics Co., Ltd. |