CN201726327U - Power-supply control circuit for large-size liquid crystal display - Google Patents
Power-supply control circuit for large-size liquid crystal display Download PDFInfo
- Publication number
- CN201726327U CN201726327U CN2010201832996U CN201020183299U CN201726327U CN 201726327 U CN201726327 U CN 201726327U CN 2010201832996 U CN2010201832996 U CN 2010201832996U CN 201020183299 U CN201020183299 U CN 201020183299U CN 201726327 U CN201726327 U CN 201726327U
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- Prior art keywords
- main power
- control circuit
- liquid crystal
- crystal display
- connects
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- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The utility model relates to the technical field of electronic components, in particular to a power-supply control circuit for a large-size liquid crystal display, comprising a PWM control part, and an AC input part, a rectification filtering part, a B+ voltage part, a main power switch part and a main power output part which are sequentially connected, wherein the B+ voltage part is connected with an auxiliary power supply part which is connected with an auxiliary voltage output part; and the PWM control part is connected with the main power output part. In the control circuit, the main power switch part is additionally arranged between the B+ voltage part and the main power output part, thus being capable of realizing that standby power consumption is lower than 0.1W, and enabling the control to be simpler.
Description
Technical field
The utility model relates to display screen stand-by circuit technical field, refers in particular to a kind of large-sized liquid crystal display power control circuit.
Background technology
Existing large-sized liquid crystal display power control circuit, as shown in Figure 1, it comprises AC importation, rectifying and wave-filtering part, B+ voltage segment, the main power source output that connects successively, the B+ voltage segment connects the accessory power supply part, accessory power supply partly connects the boost voltage output, PWM (Pulse Width Modulation, pulse-width modulation) control section control main power source output, the accessory power supply part provides VCC voltage for the PWM control section, and the main power source output provides power supply for display screen; This circuit is when the display screen standby, and stand-by power consumption is bigger, if reduce whole stand-by power consumption, makes stand-by power consumption less than 0.1W, and existing scheme is not realized.
Therefore, based on the defective of above-mentioned existing large-sized liquid crystal display power control circuit, need improve existing large-sized liquid crystal display power control circuit.
The utility model content
The purpose of this utility model is to provide a kind of large-sized liquid crystal display power control circuit at the deficiencies in the prior art, and this large-sized liquid crystal display power control circuit can realize that stand-by power consumption is less than 0.1W.
For achieving the above object, the utility model is achieved through the following technical solutions:
It comprises AC importation, rectifying and wave-filtering part, B+ voltage segment, main power switch part, the main power source output of PWM control section and connection successively, the B+ voltage segment connects the accessory power supply part, accessory power supply partly connects the boost voltage output, and the PWM control section connects the main power source output.
Described boost voltage output connects main power switch.
The beneficial effects of the utility model are: increased the main power switch part between B+ voltage segment and the main power source output, during standby, the main power switch part can stop main power source output out-put supply, thereby can realize stand-by power consumption less than 0.1W, controls simpler.
Description of drawings
Fig. 1 is the square frame principle schematic diagram of existing display screen power control circuit;
Fig. 2 is the square frame principle schematic diagram of power control circuit of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
See Fig. 2, the utility model large-sized liquid crystal display power control circuit comprises: PWM control section and the AC importation that connects successively, rectifying and wave-filtering part, B+ voltage segment, main power switch part, main power source output, the B+ voltage segment connects the accessory power supply part, accessory power supply partly connects the boost voltage output, and the PWM control section connects the main power source output; Described boost voltage output connects main power switch.
Increased the main power switch part between B+ voltage segment of the present utility model and the main power source output, accessory power supply partly connects the boost voltage output, the boost voltage output connects main power switch, during standby, the main power switch part can stop main power source output out-put supply, stand-by power consumption is met the requirements, and make control simpler, stand-by power consumption is less than 0.1W.
Certainly, the embodiment of the above, it is preferred embodiments of the present utility model, and unrestricted the utility model practical range, so all equivalences of doing according to the described structure of the utility model claim, feature and principle change or modify, and all should be included in the utility model claim.
Claims (2)
1. large-sized liquid crystal display power control circuit, it is characterized in that: it comprises AC importation, rectifying and wave-filtering part, B+ voltage segment, main power switch part, the main power source output of PWM control section and connection successively, the B+ voltage segment connects the accessory power supply part, accessory power supply partly connects the boost voltage output, and the PWM control section connects the main power source output.
2. large-sized liquid crystal display power control circuit according to claim 1 is characterized in that: described boost voltage output connects main power switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201832996U CN201726327U (en) | 2010-04-30 | 2010-04-30 | Power-supply control circuit for large-size liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201832996U CN201726327U (en) | 2010-04-30 | 2010-04-30 | Power-supply control circuit for large-size liquid crystal display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201726327U true CN201726327U (en) | 2011-01-26 |
Family
ID=43494680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201832996U Expired - Fee Related CN201726327U (en) | 2010-04-30 | 2010-04-30 | Power-supply control circuit for large-size liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201726327U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102404625A (en) * | 2011-11-09 | 2012-04-04 | 北京赛科世纪数码科技有限公司 | Set-top box and standby control method thereof |
-
2010
- 2010-04-30 CN CN2010201832996U patent/CN201726327U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102404625A (en) * | 2011-11-09 | 2012-04-04 | 北京赛科世纪数码科技有限公司 | Set-top box and standby control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110126 Termination date: 20150430 |
|
| EXPY | Termination of patent right or utility model |