CN2758812Y - Energy-saving controlling circuit for liquid crystal TV set - Google Patents
Energy-saving controlling circuit for liquid crystal TV set Download PDFInfo
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- CN2758812Y CN2758812Y CNU2004200984820U CN200420098482U CN2758812Y CN 2758812 Y CN2758812 Y CN 2758812Y CN U2004200984820 U CNU2004200984820 U CN U2004200984820U CN 200420098482 U CN200420098482 U CN 200420098482U CN 2758812 Y CN2758812 Y CN 2758812Y
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Abstract
The utility model discloses an energy saving controlling circuit for a liquid crystal TV. The utility model comprises a CPU chip and a liquid crystal screen, wherein a light adjusting pin of the liquid crystal screen is connected with the CPU chip. A pulse signal emitted by the CPU chip is inputted into an inverter of the liquid crystal screen, which changes current outputted to a backlight light tube and the duty ratio of the pulse signal can be adjusted. Therefore, the brightness of the liquid crystal screen is changed, the output power is adjusted and unnecessary waste for energy resources is effectively avoided. The controlling circuit has the advantages of simple structure and low cost. The utility model effectively solves the problem that in different watching environment, the brightness of a picture is freely adjusted. The utility model can be used in the existing liquid crystal TV.
Description
Technical field
The utility model relates to a kind of improvement of TV set circuit, specifically, relates to a kind of the realization the energy-conservation control circuit of liquid crystal TV set.
Background technology
At present, existing liquid crystal TV set is generally fixedly backlight illumination, and the power consumption of liquid crystal display immobilizes, and in some liquid crystal TV set, the brightness of its liquid crystal display can be regulated by the brightness that reduces each pixel, and the change of power consumption of this liquid crystal display is also considerably less.Watch LCD TV under some environment, it is unnecessary that fixing picture brightness can seem, and can cause the serious waste of electric power resource.
Summary of the invention
The utility model is in order to solve in the prior art liquid crystal display brightness and to immobilize or changing seldom, the energy dissipation problem that is caused, a kind of novel liquid crystal TV set energy-saving control circuit is provided, this circuit can be under different preference patterns, the different backlight illumination of control LCD TV output, and then realized different electric energy losses.
For solving the problems of the technologies described above, the utility model is achieved by the following technical programs:
A kind of energy-saving control circuit of liquid crystal TV set comprises cpu chip and liquid crystal display, and the light modulation pin of described liquid crystal display receives the pulse-width signal that cpu chip sends, and changes the electric current of input backlight lamp tube through its inner inverter, and then adjusts its brightness.
As a preferred embodiment of the present utility model, between described cpu chip and liquid crystal display, be connected with a NPN type triode, the base stage of described triode links to each other with the pulse-width signal output terminal of CPU, and collector links to each other grounded emitter with the light modulation pin of direct supply and liquid crystal display respectively.
As the further qualification to above-mentioned preferred embodiment, the collector of described triode links to each other with the pulse width signal light modulation pin of liquid crystal display, perhaps links to each other with the simulating signal light modulation pin of liquid crystal display through resistance or RC filtering circuit.
Compared with prior art, advantage of the present utility model and good effect are: the utility model is input in the inverter of liquid crystal display by the pulse signal of EDM Generator of Adjustable Duty Ratio that cpu chip is sent, change the voltage waveform of exporting to backlight lamp tube with this, and then the brightness that makes liquid crystal display obtains changing, output power is adjusted, thereby has effectively avoided the unnecessary waste of the energy.This control circuit is simple in structure, and is with low cost, efficiently solves in difference and watches the freely regulated problem of picture brightness under the environment, has very strong practicality, can be widely used in the present liquid crystal TV set.
Description of drawings
Fig. 1 is the schematic diagram of the utility model liquid crystal TV set energy-saving control circuit.
Embodiment
The utility model is described in more detail below in conjunction with the drawings and specific embodiments.
Energy-saving control circuit can make LCD TV have three kinds of (several or continuously adjustable) different power consumption modes in the utility model: standard, pattern one, pattern two.Under mode standard, the output power of televisor is a rated power, from the mode standard to the pattern one and from pattern one to pattern two power reduction amplitude is not less than 20W, its physical circuit annexation is referring to shown in Figure 1.
Among Fig. 1, the pulse-width signal output terminal C26 of cpu chip N8 links to each other through the base stage of resistance R 88 with NPN type triode V3, its collector links to each other with the 5V direct supply through resistance R 86 respectively, links to each other with the pulse width signal light modulation pin PWMDimmer or the simulating signal light modulation pin Analog Dimmer of liquid crystal display through RC filtering circuit (being made up of resistance R 87, capacitor C 198).When connecting pulse width signal light modulation pin PWMDimmer, resistance R 87 is 0 Europe, and capacitor C 198 is removed; When connection mode analog signal light modulation pin AnalogDimmer, the parameter of resistance R 87 and capacitor C 198 need be according to concrete liquid crystal screen parameter decision.
Energy-saving control function is to realize by software control on the basis of foregoing circuit.The user is by the default energy saver mode in telepilot selected menu the inside, every kind of pairing pulsed frequency of pattern is preestablished according to the liquid crystal display that is adopted, CPU changes the value of corresponding registers according to this pattern, and then change CPU output duty of ratio, the pulse of the inverter INVERTER response input of liquid crystal display, change the electric current of exporting to backlight lamp tube with this, realize the adjustment of liquid crystal display brightness, thereby when environment is watched in adaptation, reach purpose of energy saving.
The utility model circuit structure is simple, and is practical, can be widely used in the present liquid crystal TV set.Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection domain of the present utility model.
Claims (5)
1. the energy-saving control circuit of a liquid crystal TV set, comprise cpu chip and liquid crystal display, it is characterized in that: the light modulation pin of described liquid crystal display receives the pulse-width signal that cpu chip sends, and changes the electric current of input backlight lamp tube through its inner inverter, and then adjusts its brightness.
2. the energy-saving control circuit of liquid crystal TV set according to claim 1, it is characterized in that: between described cpu chip and liquid crystal display, be connected with a NPN type triode (V3), the base stage of described triode (V3) links to each other with the pulse-width signal output terminal of CPU, collector links to each other grounded emitter with the light modulation pin of direct supply and liquid crystal display respectively.
3. the energy-saving control circuit of liquid crystal TV set according to claim 2, it is characterized in that: the collector of described triode (V3) links to each other with the pulse width signal light modulation pin (PWM Dimmer) of liquid crystal display.
4. the energy-saving control circuit of liquid crystal TV set according to claim 2, it is characterized in that: the collector of described triode (V3) links to each other with the simulating signal light modulation pin (AnalogDimmer) of liquid crystal display through a resistance (R87).
5. the energy-saving control circuit of liquid crystal TV set according to claim 2, it is characterized in that: the collector of described triode (V3) links to each other with the simulating signal light modulation pin (Analog Dimmer) of liquid crystal display through a RC filtering circuit (R87, C198).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200984820U CN2758812Y (en) | 2004-11-19 | 2004-11-19 | Energy-saving controlling circuit for liquid crystal TV set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200984820U CN2758812Y (en) | 2004-11-19 | 2004-11-19 | Energy-saving controlling circuit for liquid crystal TV set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2758812Y true CN2758812Y (en) | 2006-02-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004200984820U Expired - Fee Related CN2758812Y (en) | 2004-11-19 | 2004-11-19 | Energy-saving controlling circuit for liquid crystal TV set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2758812Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102078181A (en) * | 2010-12-20 | 2011-06-01 | 樊东泉 | Luminance-adjustable ophthalmoscope dimming circuit |
| CN103869727A (en) * | 2012-12-18 | 2014-06-18 | 苏州工业园区新宏博通讯科技有限公司 | Integrated circuit of single chip microcomputer and digital-to-analog converter |
-
2004
- 2004-11-19 CN CNU2004200984820U patent/CN2758812Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102078181A (en) * | 2010-12-20 | 2011-06-01 | 樊东泉 | Luminance-adjustable ophthalmoscope dimming circuit |
| CN103869727A (en) * | 2012-12-18 | 2014-06-18 | 苏州工业园区新宏博通讯科技有限公司 | Integrated circuit of single chip microcomputer and digital-to-analog converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |