CN201594937U - LED backlight adjustment switching circuit and display device - Google Patents
LED backlight adjustment switching circuit and display device Download PDFInfo
- Publication number
- CN201594937U CN201594937U CN2009202604138U CN200920260413U CN201594937U CN 201594937 U CN201594937 U CN 201594937U CN 2009202604138 U CN2009202604138 U CN 2009202604138U CN 200920260413 U CN200920260413 U CN 200920260413U CN 201594937 U CN201594937 U CN 201594937U
- Authority
- CN
- China
- Prior art keywords
- triode
- signal input
- light
- modulating mode
- led
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Led Devices (AREA)
Abstract
The utility model is adaptable to the technical field of backlight adjustment for display equipment, and provides an LED backlight adjustment switching circuit and a display device. The LED backlight adjustment switching circuit comprises a plurality of dimming mode signal input ends, a switching signal input end, a dimming mode signal selecting unit and a dimming unit. The LED backlight adjustment switching circuit is compatible with different dimming modes. By utilizing the circuit to select different dimming modes to adjust LED backlight according to switching signals, the display device can realize switching of dimming modes flexibly.
Description
Technical field
The utility model belongs to the technical field of the adjusting backlight of display device, relates in particular to a kind of LED-backlit and regulates commutation circuit and display device.
Background technology
Under the continuous development of Display Technique in recent years, display devices such as many LCD TV and computer monitor are all towards ultra-thin and energy-conservation aspect development, most of manufacturers are all from traditional CCFL or EEFL is backlight switches to LED-backlit, this has not only realized ultra-thinization of display device, has more embodied its advantages of energy saving and environmental protection.Existing display device light-modulating mode has two kinds of simulation light modulation (Analog Dimming) and digital dimmings (Burst Dimming), in using usually, can select wherein a kind of pattern, and early stage circuit debugging with tend to occur during system cooperates because the interference that certain light-modulating mode brought or because of problems such as the different mainboard light-modulating modes of arranging in pairs or groups are incompatible, at this moment just need to change another light-modulating mode, in order to reach this purpose, often need to change again PCB, like this progress of project and debugging are all brought extremely inconvenience.
The utility model content
The purpose of this utility model is to provide a kind of LED-backlit to regulate commutation circuit, is intended to solve the problem that existing display device can not be realized the switching of light-modulating mode neatly.
The utility model is achieved in that a kind of LED-backlit adjusting commutation circuit, and described LED-backlit is regulated commutation circuit and comprised:
A plurality of light-modulating mode signal input parts;
The switching signal input;
The light-modulating mode signal selected cell that is connected with the switching signal input with described a plurality of light-modulating mode signal input parts respectively, switching signal according to described switching signal input output, allow road light-modulating mode signal in a plurality of light-modulating mode signals of described a plurality of light-modulating mode signal input part output by light-modulating mode signal selected cell, and output; And
The light modulation unit that is connected with described light-modulating mode signal selected cell output is regulated LED-backlit according to the light-modulating mode signal of light-modulating mode signal selected cell output.
In the said structure, described a plurality of light-modulating mode signal input parts comprise direct current signal input and pulse signal input terminal.
In the said structure, described light-modulating mode signal selected cell comprises:
The direct current signal channel module that is connected with the light modulation unit with described direct current signal input respectively, the direct current signal of described direct current signal input output arrives described light modulation unit by the direct current signal channel module;
The direct current signal switch module that is connected with the direct current signal channel module with described switching signal input according to switching signal, is controlled the break-make of described direct current signal channel module respectively;
The pulse signal channel module that is connected with the light modulation unit with described pulse signal input terminal respectively, the pulse signal of described pulse signal input terminal output arrives described light modulation unit by the pulse signal channel module; And
The pulse signal switch module that is connected with the pulse signal channel module with described switching signal input according to switching signal, is controlled the break-make of described pulse signal channel module respectively.
In the said structure, described direct current signal channel module comprises resistance R 3 and resistance R 9, the described direct current signal input of first termination of described resistance R 3, first end of the second terminating resistor R9 of described resistance R 3, the described light modulation of second termination unit of described resistance R 9.
In the said structure, described direct current signal switch module comprises first triode, and the base stage of described first triode connects described switching signal input, and the collector electrode of described first triode connects second end of described resistance R 3, the grounded emitter of described first triode.
In the said structure, described pulse signal channel module comprises the 3rd triode, the 4th triode and diode, the base stage of described the 3rd triode connects described pulse signal input terminal, the collector electrode of described the 3rd triode connects the base stage of the 4th triode, the grounded emitter of described the 3rd triode, the collector electrode of described the 4th triode connects the anode of described diode, and the negative electrode of described diode connects the light modulation unit, the grounded emitter of described the 4th triode.
In the said structure, described pulse signal switch module comprises second triode and the 5th triode, the base stage of described second triode connects described switching signal input, the collector electrode of described second triode connects the base stage of described the 5th triode, the grounded emitter of described second triode, the collector electrode of described the 5th triode connects the anode of described diode, the grounded emitter of described the 5th triode.
In the said structure, described light modulation unit is a LED drive controlling chip, and the light-modulating mode signal input part of described LED drive controlling chip connects second end of described resistance R 9 and the negative electrode of diode respectively.
Another purpose of the present utility model is to provide a kind of display device that comprises above-mentioned LED-backlit adjusting commutation circuit.
In the utility model, this circuit compatibility different light-modulating modes, adopt this circuit according to switching signal, select different light-modulating modes that LED-backlit is regulated, make display device can realize the switching of light-modulating mode neatly.
Description of drawings
Fig. 1 is that the LED-backlit that the utility model embodiment provides is regulated the structure chart of commutation circuit;
Fig. 2 is that the LED-backlit that the utility model embodiment provides is regulated the exemplary circuit figure of commutation circuit.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Fig. 1 shows the structure of the power protecting circuit that the utility model embodiment provides.
LED-backlit is regulated commutation circuit and is comprised a plurality of light-modulating mode signal input parts, switching signal input 200, light-modulating mode signal selected cell 300 and light modulation unit 400.
Light-modulating mode signal selected cell 300 is connected with switching signal input 200 with a plurality of light-modulating mode signal input parts respectively, switching signal according to 200 outputs of switching signal input, allow road light-modulating mode signal in a plurality of light-modulating mode signals of a plurality of light-modulating mode signal input parts output by light-modulating mode signal selected cell 300, and output.
As the utility model one embodiment, a plurality of light-modulating mode signal input parts comprise direct current signal input 101 and pulse signal input terminal 102.
As the utility model one embodiment, light-modulating mode signal selected cell 300 comprises:
The direct current signal channel module 301 that is connected with light modulation unit 400 with direct current signal input 101 respectively, the direct current signal of direct current signal input 101 outputs arrives light modulation unit 400 by direct current signal channel module 301;
The direct current signal switch module 302 that is connected with direct current signal channel module 301 with switching signal input 200 respectively, according to switching signal, the break-make of control direct current signal channel module 301;
The pulse signal channel module 304 that is connected with light modulation unit 400 with pulse signal input terminal 102 respectively, the pulse signal of pulse signal input terminal 102 outputs arrives light modulation unit 400 by pulse signal channel module 304;
The pulse signal switch module 303 that is connected with pulse signal channel module 304 with switching signal input 200 respectively, according to switching signal, the break-make of control wave channel module 304.
The LED-backlit that Fig. 2 shows the utility model embodiment to be provided is regulated the exemplary circuit structure of commutation circuit.
Direct current signal channel module 301 comprises resistance R 3 and resistance R 9, the first termination direct current signal input 101 of resistance R 3, first end of the second terminating resistor R9 of resistance R 3, the second termination light modulation unit 400 of resistance R 9.
Direct current signal switch module 302 comprises the first triode Q1, and the base stage of the first triode Q1 connects second end of the collector electrode connecting resistance R3 of switching signal input 200, the first triode Q1, the grounded emitter of the first triode Q1.
Pulse signal channel module 304 comprises the 3rd triode Q3, the 4th triode Q4 and diode D1, the base stage of the 3rd triode Q3 connects pulse signal input terminal 102, the collector electrode of the 3rd triode Q3 connects the base stage of the 4th triode Q4, the grounded emitter of the 3rd triode Q3, the collector electrode of the 4th triode Q4 connects the anode of diode D1, the negative electrode of diode D1 connects the grounded emitter of light modulation unit 400, the four triode Q4.
Pulse signal switch module 303 comprises the second triode Q2 and the 5th triode Q5, the base stage of the second triode Q2 connects switching signal input 200, the collector electrode of the second triode Q2 connects the base stage of the 5th triode Q5, the grounded emitter of the second triode Q2, the collector electrode of the 5th triode Q5 connects the anode of diode D1, the grounded emitter of the 5th triode Q5.
As the utility model one embodiment, light-modulating mode signal selected cell 300 also comprises resistance R 1, resistance R 2, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 10, resistance R 11, resistance R 12, resistance R 13.Resistance R 1 connects the base stage of the switching signal input 200 and the first triode Q1 respectively, series resistor R2 between the points of common connection of the base stage of the resistance R 1 and the first triode Q1 and the ground, series resistor R4 between second end of resistance R 3 and the ground, the collector electrode of the second triode Q2, the collector electrode of the 3rd triode Q3, the collector electrode of the 4th triode Q4 is respectively by resistance R 5, resistance R 6, resistance R 7 meets the reference voltage terminal REG of LED drive controlling chip U1, series resistor R8 between the reference voltage terminal REG of first end of resistance R 9 and LED drive controlling chip U1, resistance R 10 connects the base stage of the switching signal input 200 and the second triode Q2 respectively, series resistor R11 between the points of common connection of the base stage of the resistance R 10 and the second triode Q2 and the ground, resistance R 12 connects the base stage of pulse signal input terminal 200 and the 3rd triode Q3 respectively, series resistor R13 between the points of common connection of the base stage of resistance R 12 and the 3rd triode Q3 and the ground.
The operation principle that LED-backlit is regulated commutation circuit is:
1, direct current signal light-modulating mode: this moment, switching signal was a low level, the first triode Q1, the second triode Q2 end, the 5th triode Q5 provides the bigoted voltage of base stage and conducting by reference voltage terminal REG (reference signal 5V) through resistance R 5, this moment diode D1 anode thereby be pulled to low level, pulse signal can't arrive the light-modulating mode signal input part BURST of LED drive controlling chip U1, and direct current signal is by the light-modulating mode signal input part BURST of resistance R 3 and resistance R 9 arrival LED drive controlling chip U1, so pattern is the direct current signal light-modulating mode.
2, pulse signal light-modulating mode: this moment, switching signal was a high level, the first triode Q1, the second triode Q2 conducting, because the second triode Q2 conducting, the base stage of the 5th triode Q5 is dragged down is low level, so this moment, the 5th triode Q5 ended.Pulse signal is passed to diode D1 through the 3rd triode Q3, the 4th triode Q4, is passed to the light-modulating mode signal input part BURST of LED drive controlling chip U1 again by diode D1, finishes the pulse signal light-modulating mode.And the direct current signal of this moment is pulled to low level owing to the conducting of the first triode Q1, can not play the brightness adjustment control effect.
The utility model embodiment also provides a kind of display device, and display device comprises above-mentioned LED-backlit adjusting commutation circuit.
In the utility model embodiment, this circuit compatibility different light-modulating modes, adopt this circuit according to switching signal, select different light-modulating modes that LED-backlit is regulated, make display device can realize the switching of light-modulating mode neatly.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (9)
1. a LED-backlit is regulated commutation circuit, it is characterized in that, described LED-backlit is regulated commutation circuit and comprised:
A plurality of light-modulating mode signal input parts;
The switching signal input;
The light-modulating mode signal selected cell that is connected with the switching signal input with described a plurality of light-modulating mode signal input parts respectively, switching signal according to described switching signal input output, allow road light-modulating mode signal in a plurality of light-modulating mode signals of described a plurality of light-modulating mode signal input part output by light-modulating mode signal selected cell, and output; And
The light modulation unit that is connected with described light-modulating mode signal selected cell output is regulated LED-backlit according to the light-modulating mode signal of light-modulating mode signal selected cell output.
2. LED-backlit as claimed in claim 1 is regulated commutation circuit, it is characterized in that described a plurality of light-modulating mode signal input parts comprise direct current signal input and pulse signal input terminal.
3. LED-backlit as claimed in claim 2 is regulated commutation circuit, it is characterized in that described light-modulating mode signal selected cell comprises:
The direct current signal channel module that is connected with the light modulation unit with described direct current signal input respectively, the direct current signal of described direct current signal input output arrives described light modulation unit by the direct current signal channel module;
The direct current signal switch module that is connected with the direct current signal channel module with described switching signal input according to switching signal, is controlled the break-make of described direct current signal channel module respectively;
The pulse signal channel module that is connected with the light modulation unit with described pulse signal input terminal respectively, the pulse signal of described pulse signal input terminal output arrives described light modulation unit by the pulse signal channel module; And
The pulse signal switch module that is connected with the pulse signal channel module with described switching signal input according to switching signal, is controlled the break-make of described pulse signal channel module respectively.
4. LED-backlit as claimed in claim 3 is regulated commutation circuit, it is characterized in that, described direct current signal channel module comprises resistance R 3 and resistance R 9, the described direct current signal input of first termination of described resistance R 3, first end of the second terminating resistor R9 of described resistance R 3, the described light modulation of second termination unit of described resistance R 9.
5. LED-backlit as claimed in claim 4 is regulated commutation circuit, it is characterized in that, described direct current signal switch module comprises first triode, the base stage of described first triode connects described switching signal input, the collector electrode of described first triode connects second end of described resistance R 3, the grounded emitter of described first triode.
6. LED-backlit as claimed in claim 5 is regulated commutation circuit, it is characterized in that, described pulse signal channel module comprises the 3rd triode, the 4th triode and diode, the base stage of described the 3rd triode connects described pulse signal input terminal, the collector electrode of described the 3rd triode connects the base stage of the 4th triode, the grounded emitter of described the 3rd triode, the collector electrode of described the 4th triode connects the anode of described diode, the negative electrode of described diode connects the light modulation unit, the grounded emitter of described the 4th triode.
7. LED-backlit as claimed in claim 6 is regulated commutation circuit, it is characterized in that, described pulse signal switch module comprises second triode and the 5th triode, the base stage of described second triode connects described switching signal input, the collector electrode of described second triode connects the base stage of described the 5th triode, the grounded emitter of described second triode, the collector electrode of described the 5th triode connects the anode of described diode, the grounded emitter of described the 5th triode.
8. LED-backlit as claimed in claim 7 is regulated commutation circuit, it is characterized in that described light modulation unit is a LED drive controlling chip, and the light-modulating mode signal input part of described LED drive controlling chip connects second end of described resistance R 9 and the negative electrode of diode respectively.
9. a display device is characterized in that, described display device comprises as each described LED-backlit of claim 1-8 regulates commutation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202604138U CN201594937U (en) | 2009-11-13 | 2009-11-13 | LED backlight adjustment switching circuit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202604138U CN201594937U (en) | 2009-11-13 | 2009-11-13 | LED backlight adjustment switching circuit and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201594937U true CN201594937U (en) | 2010-09-29 |
Family
ID=42777004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202604138U Expired - Lifetime CN201594937U (en) | 2009-11-13 | 2009-11-13 | LED backlight adjustment switching circuit and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201594937U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104994630A (en) * | 2015-06-19 | 2015-10-21 | 伊博电源（杭州）有限公司 | LED drive control method integrating multiple dimming modes |
| CN106376131A (en) * | 2016-10-14 | 2017-02-01 | 上海晶丰明源半导体有限公司 | Light-emitting circuit, controller applying same and control method |
-
2009
- 2009-11-13 CN CN2009202604138U patent/CN201594937U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104994630A (en) * | 2015-06-19 | 2015-10-21 | 伊博电源（杭州）有限公司 | LED drive control method integrating multiple dimming modes |
| CN106376131A (en) * | 2016-10-14 | 2017-02-01 | 上海晶丰明源半导体有限公司 | Light-emitting circuit, controller applying same and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102842893B (en) | Short-circuit protection and control circuit for LED (Lighnt emitting Diode) strip lamp | |
| CN111415626A (en) | Mini-L ED light source and driving circuit and driving method thereof | |
| CN201917839U (en) | Automatic maintaining voltage adjusting circuit for PDP (Plasma Display Panel) display screen | |
| CN201594937U (en) | LED backlight adjustment switching circuit and display device | |
| CN202856317U (en) | LED light bar short circuit protection control circuit | |
| CN206099771U (en) | Signal output unit | |
| CN105099567B (en) | A kind of emitter of the visible light communication system based on white light LEDs | |
| CN201365366Y (en) | Backlight driving circuit and television with same | |
| CN208724068U (en) | Back-light starting circuit | |
| CN201622822U (en) | Backlight regulating circuit | |
| CN201583940U (en) | Device for indicating running state of network and network terminal | |
| CN203279267U (en) | AC (alternating current) driving LED luminance stabilizing apparatus | |
| CN205194297U (en) | AC detection circuitry and LED power supply unit | |
| CN206601919U (en) | A kind of LED display for eliminating caterpillar phenomenon | |
| CN205946251U (en) | Back of body light adjustment circuit and TV set | |
| CN201378416Y (en) | Backlight control circuit and TV set provided with the same | |
| CN103713769A (en) | Touch screen control transmission device | |
| CN202025518U (en) | Liquid crystal screen backlight control circuit and computer | |
| CN103280192A (en) | LED (light-emitting diode) backlight driving circuit, LCD (liquid crystal display) device and driving method | |
| CN201413625Y (en) | Back light modulation circuit and TV set with the same | |
| CN207678051U (en) | A kind of constant-current dimming protection circuit, constant current driving device and television set | |
| CN202583796U (en) | Hot-pluggable multichannel analogue output module | |
| CN207897185U (en) | A kind of pure LED light load for LED driver test | |
| CN207440481U (en) | The liquid crystal display device of intelligent dimming | |
| CN204190988U (en) | Be applied to the constant-current control circuit structure of high power LED device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100929 |