CN201556159U - Low-power consumption standby circuit and liquid crystal display device with same - Google Patents
Low-power consumption standby circuit and liquid crystal display device with same Download PDFInfo
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- CN201556159U CN201556159U CN2009200429740U CN200920042974U CN201556159U CN 201556159 U CN201556159 U CN 201556159U CN 2009200429740 U CN2009200429740 U CN 2009200429740U CN 200920042974 U CN200920042974 U CN 200920042974U CN 201556159 U CN201556159 U CN 201556159U
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Abstract
The utility model provides a low-power consumption standby circuit of a liquid crystal product. The standby circuit comprises a low-power consumption standby chip, a standby power source and a power supply switch, wherein the low-power consumption standby chip is supplied with power independently by the standby power source, receives input control signals, receives standby signals from a main control chip of the liquid crystal product and outputs controls signals to the power supply switch so as to switch on or off the power supply switch, and the power supply switch turns on or off the power supply circuit of the main control chip. The standby circuit utilizes the low-power consumption chip, can reduce standby power consumption of liquid crystal products in small sizes such as 19 inches or 22 inches, and supports energy-saving requirements of 1W low-power consumption standby.
Description
Technical field
The utility model relates to LCD product, more specifically, relates to a kind of low-power consumption standby circuit of LCD product and uses the liquid-crystal apparatus of this stand-by circuit.
Background technology
For present LCD product, the important indicator that for example LCD, LCD TV etc., the power consumption under its holding state are products aspect energy-conservation.In general, require LCD product should support the low-power consumption standby of 1W.
In large-sized LCD product, lcd power source output+the 5V supply voltage is divided into+5V master's supply voltage and+two kinds of 5V standby supply voltages.When operate as normal, the output of+5V master supply voltage is for main control chip and other parts of LCD product are powered; When power supply receives standby signal, just to liquid crystal display power supply+12V voltage and above-mentioned+5V master's supply voltage break output+5V standby supply voltage.Under holding state, only to the main control chip power supply, other parts for LCD product do not provide electric energy to+5V standby supply voltage.Thereby the efficiency ratio of power supply this moment under low loading condition is higher, generally can reach the low-power consumption standby of 1W.
Yet, in the small size LCD product power panel of at present traditional 19 cun or 22 cun, feed circuit are output as fixing+12V voltage.To the main control chip of this LCD product power+5V voltage, need with the DC-DC converter with feed circuit output+12V is transformed into+5V, again to main control chip output+5V supply voltage.Should+the 5V supply voltage do not have+5V master's supply voltage and+branch of 5V standby supply voltage.So, when standby, in order to make main control chip maintenance work, so that receive starting-up signal at any time, power panel still needs to export+supply voltage of 12V, so that can keep power supply, make product respond starting-up signal at any time and recover normal duty the LCD product main control chip.This causes the power supplying efficiency of lcd power source plate under holding state on the low side, generally has only between 20% to 40%.So existing liquid crystal small size power panel is when being in holding state, its stand-by power consumption does not generally reach the energy-conservation requirement of 1W.
Therefore, the subject matter that small size lcd power source plate of the prior art exists is: owing to need receive and respond starting-up signal at any time, keep the work of main control chip when standby, the power consumption when this causes holding state is too high, can not reach energy-conservation requirement.Thereby, need a kind of improved low power consumption liquid crystal stand-by circuit, when this circuit application being supported small size LCD product such as 19 cun of the 1W low-power consumption standby or 22 cun in needs, can reduce its stand-by power consumption effectively, reach energy-conservation requirement.
The utility model content
In order to solve the problems of the technologies described above, the utility model provides a kind of low-power consumption standby circuit, can reduce the stand-by power consumption of small size LCD products such as 19 cun or 22 cun, supports the energy-conservation requirement of 1W low-power consumption standby.
Described low power consumption liquid crystal stand-by circuit comprises: low-power consumption standby chip, standby power and power switch, and main control chip; Wherein, the low-power consumption standby chip is powered separately by standby power, receives the control signal of input, and receives standby signal from the main control chip of LCD product; Described low-power consumption standby chip is exported control signal to power switch, opens or close power switch; Described power switch opens or closes the feed circuit of described main control chip.
After described low-power consumption standby chip is received standby signal from main control chip, send control signal and close described power switch.
Described low-power consumption standby chip sends control signal and opens described power switch after receiving the described control signal of indication start.
Described control signal is the remote signal from the telepilot input, and perhaps described control signal is the push button signalling from the key panel input of LCD product shell.
Wherein, the power consumption of described low-power consumption standby chip is lower than 1W.Because under holding state, the feed circuit of main control chip cut off and quit work, have only this low-power consumption standby chip to keep duty.
Described power switch is a CMOS type triode, and described control signal is connected to the base stage of described CMOS type triode.
The utility model also provides a kind of liquid-crystal apparatus of low-power consumption, comprising: main control chip receives the control signal of input and liquid-crystal apparatus is controlled; The main control chip power supply is powered to main control chip.Described liquid-crystal apparatus also comprises low-power consumption standby chip, standby power and power switch.Wherein, the low-power consumption standby chip is powered separately by standby power, receives described control signal, and receives standby signal from the main control chip of LCD product; Described low-power consumption standby chip is exported control signal to power switch, opens or close power switch; Described power switch opens or closes the feed circuit of described main control chip.
Wherein, after described main control chip receives the described control signal of indication standby, carry out standby and prepare and send described standby signal; Described low-power consumption standby chip sends control signal and closes described power switch after receiving described standby signal from main control chip.
Wherein, described low-power consumption standby chip sends control signal and opens described power switch after receiving the described control signal of indication start.
In stand-by circuit of the present utility model and liquid-crystal apparatus, the low-power consumption standby chip by this increase can effectively reduce the power consumption under the holding state, reaches the energy-conservation requirement that is lower than 1W.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the principle schematic of the low-power consumption standby circuit of the utility model embodiment.
Fig. 2 is the circuit theory diagrams of the low-power consumption standby chip of the utility model embodiment.
Fig. 3 is the circuit theory diagrams of the power switch of the utility model embodiment.
Fig. 4 is the workflow diagram of the low-power consumption standby circuit of the utility model embodiment.
Embodiment
In order to make those skilled in the art person understand the utility model scheme better, and above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, the utility model is described in further detail below in conjunction with embodiment and embodiment accompanying drawing.
Fig. 1 is the principle schematic of the low power consumption liquid crystal stand-by circuit that increases of the utility model.As shown in fig. 1, low power consumption liquid crystal stand-by circuit of the present utility model has increased low-power consumption standby chip 101, standby power 102 and power switch 103 in existing liquid crystal circuit.
Comprise main control chip 105 in the LCD product, in normal operation, this main control chip 105 is responsible for receiving various input signals and LCD product is carried out every control, and main control chip 105 is powered by the main control chip power supply 104 of+5V.In order to reach the purpose that the utility model reduces the power consumption under the holding state, be provided with the stand-by circuit of forming by low-power consumption standby chip 101, standby power 102 and power switch 103.Wherein, low-power consumption standby chip 101 adopts independent+5V standby power 102 to power.Compare with main control chip 105, these low-power consumption standby chip 101 power consumptions are very low, far below 1W.Low-power consumption standby chip 101 and main control chip 105 multiplexing remote control circuit and key circuits, in normal operation promptly, low-power consumption standby chip 101 and main control chip 105 can receive simultaneously from the remote signal 106 of telepilot input and the push button signalling of importing from the key panel of LCD product shell 107.Low-power consumption chip 103 receives standby signal 108 from main control chip 105, and to power switch 103 output control signal POWER_SB, thereby by being switched, this control signal POWER_SB opens or closes power switch 103 between high level and low level.Power switch 103 connects the power supply 104 of main control chip, opens or close the feed circuit of main control chip.As seen, low-power consumption chip 101 can come main control chip 105 is powered by control power switch 103, or cuts off the power supply to main control chip 105.
Fig. 2 is the circuit theory diagrams of low-power consumption standby chip 101 of the present utility model.As shown in the figure, this circuit comprises: low-power consumption standby chip N25, comprise GND, VCC and GP0-GP5 respective pin, and input or output KEY respectively, LED_R, IR_CPU, CPU_I/O, POWER_SB, signals such as KEY_POWER; Described stand-by circuit also comprises R307, R310, R305, R306, R309, R314, R388, R398, C233, C108 constant resistance or electric capacity; The power supply input pin Vcc of low-power consumption standby chip N25 connects independent power supply 5V_CPU, and its GP4 pin is exported above-mentioned control signal POWER_SB to power switch 103, the conducting of control power switch 103 or end.This low-power consumption standby chip N25 can adopt the control chip with low-power consumption function and relatively low cost.For example, the low-power consumption standby chip can adopt the PIC12F series CMOS single-chip microcomputer of MICROCHIP company exploitation.Every cost of this series monolithic only is about ternary, promptly can simply realize being lower than the low-power consumption standby needs of 1W.
Fig. 3 is the circuit theory diagrams of power switch 103 of the present utility model.Power switch adopts simple CMOS triode switch.Be connected to the base stage of CMOS type triode V37 from the described control signal POWER_SB of low-power consumption standby chip N25 shown in Figure 2 output by resistance R 311, thereby utilize low-power consumption standby chip N25 to control the conducting of this triode V37 and end.Triode also connects+5V_in power supply and resistance L52; Obviously, when triode V37 conducting, to main control chip provide power supply+the 5V_IN supply voltage inserts main control chip.Otherwise when triode V37 ended, the power supply of main control chip was cut off, and the also corresponding disappearance of the power consumption of main control chip.
Below in conjunction with accompanying drawing, introduce the course of work of low-power consumption standby circuit of the present utility model:
To enter standby/normal operating conditions by remote control switchable liquid crystal product is example, and the course of work as shown in Figure 4.Normal operating conditions 401 times, main control chip 105 and the low-power consumption standby chip 101 common remote signals 106 that receive; After the 106 indication LCD product shutdown of remote signal in the step 402 entered holding state, shown in step 403, main control chip 105 carries out standby to be prepared, and sends a standby signal 108 to low-power consumption standby chip 101; Step 404 after low-power consumption standby chip 101 receives standby signal 108, is sent control signal POWER_SB to power switch 103 and is closed this switch, promptly cuts off the power supply of other chip that comprises main control chip 105; At this moment LCD product enters holding state, and main control chip 105 is owing to outage quits work, and its power consumption disappears, and only low-power consumption standby chip 101 keeps duty, therefore can reach the economize on electricity standard that is lower than 1W under holding state; If from the holding state remote-controlled start-up, remote signal 106 indication liquid crystal device power-up in the step 405; Low-power consumption standby chip 101 is received starting-up signal and the power switch 103 of main control chip 105 is opened that main control chip begins operate as normal, and liquid crystal apparatus is returned to normal operating conditions.
Obviously, the user also can finish standby/open state by the button on the control panel that is positioned at the LCD product shell switches, at this moment the course of work of stand-by circuit and remote control standby/start process basically identical shown in Figure 4, difference only is therefore not give unnecessary details by push button signalling 107 indication LCD product standby/starts.
The above only is an embodiment of the present utility model, and the utility model can also be applied in other opertaing device.Protection domain of the present utility model is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the utility model discloses, and the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain that claim was defined.
Claims (10)
1. low-power consumption standby circuit is characterized in that: comprise low-power consumption standby chip, standby power and power switch, and main control chip; Wherein, described low-power consumption standby chip is powered separately by standby power, receives the control signal of input, and receives standby signal from main control chip; Power switch is opened or closed to described low-power consumption standby chip to described power switch output control signal; Described power switch opens or closes the feed circuit of described main control chip.
2. low-power consumption standby circuit according to claim 1 is characterized in that: after described low-power consumption standby chip is received standby signal from main control chip, send control signal and close described power switch.
3. low-power consumption standby circuit according to claim 1 is characterized in that: described low-power consumption standby chip sends control signal and opens described power switch after receiving the described control signal of indication start.
4. low-power consumption standby circuit according to claim 3 is characterized in that: described control signal is the remote signal from the telepilot input.
5. low-power consumption standby circuit according to claim 3 is characterized in that: described control signal is the push button signalling from the key panel input of LCD product shell.
6. according to each described low-power consumption standby circuit in the claim 1 to 5, it is characterized in that: the power consumption of described low-power consumption standby chip is lower than 1W.
7. according to each described low-power consumption standby circuit in the claim 1 to 5, it is characterized in that: described power switch is a CMOS type triode, and described control signal is connected to the base stage of described CMOS type triode.
8. a liquid crystal indicator comprises main control chip, receives and exports control signal liquid-crystal apparatus is controlled; The main control chip power supply is powered to main control chip; It is characterized in that:
Described liquid-crystal apparatus also comprises low-power consumption standby chip, standby power and power switch; Wherein, described low-power consumption standby chip is powered separately by standby power, receives the control signal of described input, and receives standby signal from described main control chip; Described low-power consumption standby chip is exported control signal to power switch, opens or close power switch; Described power switch opens or closes the feed circuit of described main control chip.
9. liquid crystal indicator according to claim 8 is characterized in that: after described main control chip receives the described control signal of indication standby, carry out standby and prepare and send described standby signal; Described low-power consumption standby chip sends control signal and closes described power switch after receiving described standby signal from main control chip.
10. liquid crystal indicator according to claim 8 is characterized in that: described low-power consumption standby chip sends control signal and opens described power switch after receiving the described control signal of indication start.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200429740U CN201556159U (en) | 2009-06-30 | 2009-06-30 | Low-power consumption standby circuit and liquid crystal display device with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200429740U CN201556159U (en) | 2009-06-30 | 2009-06-30 | Low-power consumption standby circuit and liquid crystal display device with same |
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| CN201556159U true CN201556159U (en) | 2010-08-18 |
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| CN2009200429740U Expired - Fee Related CN201556159U (en) | 2009-06-30 | 2009-06-30 | Low-power consumption standby circuit and liquid crystal display device with same |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103348304A (en) * | 2011-02-07 | 2013-10-09 | 晶像股份有限公司 | Mechanism for low power standby mode control circuit |
| CN103354085A (en) * | 2013-08-05 | 2013-10-16 | 国家电网公司 | Displaying control apparatus of liquid crystal display screen |
| CN104252840A (en) * | 2014-09-11 | 2014-12-31 | 天津三星电子有限公司 | Driving circuit |
| CN105823182A (en) * | 2016-04-18 | 2016-08-03 | 海信（山东）空调有限公司 | Standby control circuit and air conditioner |
| CN106648028A (en) * | 2016-12-22 | 2017-05-10 | 珠海市魅族科技有限公司 | Wearable intelligent terminal power source management method and device |
| CN109546843A (en) * | 2018-11-20 | 2019-03-29 | 广东长虹电子有限公司 | A kind of ultralow standby energy consumption power module |
| US10713987B2 (en) | 2017-10-25 | 2020-07-14 | Shanghai Avic Opto Electronics Co., Ltd. | Display panel and display device |
| CN112083794A (en) * | 2020-09-11 | 2020-12-15 | 深圳市当智科技有限公司 | Power management circuit, electronic product and control method |
| CN112255940A (en) * | 2020-09-25 | 2021-01-22 | 深圳市当智科技有限公司 | Control circuit, electrical equipment and control method in standby mode |
| CN112735327A (en) * | 2020-12-31 | 2021-04-30 | 威创集团股份有限公司 | Power supply control circuit of LED all-in-one machine and LED all-in-one machine |
| CN114610137A (en) * | 2022-03-11 | 2022-06-10 | 冠捷电子科技(福建)有限公司 | Energy-saving control method and energy-saving framework of display |
| CN114827770A (en) * | 2022-04-02 | 2022-07-29 | 哈工(青岛)交通智能装备科技有限公司 | Wireless sensor low-power consumption processing method based on co-processing chip |
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2009
- 2009-06-30 CN CN2009200429740U patent/CN201556159U/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103348304B (en) * | 2011-02-07 | 2016-12-21 | 美国莱迪思半导体公司 | Mechanism for low power standby mode control circuit |
| CN103348304A (en) * | 2011-02-07 | 2013-10-09 | 晶像股份有限公司 | Mechanism for low power standby mode control circuit |
| CN103354085A (en) * | 2013-08-05 | 2013-10-16 | 国家电网公司 | Displaying control apparatus of liquid crystal display screen |
| CN104252840A (en) * | 2014-09-11 | 2014-12-31 | 天津三星电子有限公司 | Driving circuit |
| CN105823182A (en) * | 2016-04-18 | 2016-08-03 | 海信（山东）空调有限公司 | Standby control circuit and air conditioner |
| CN106648028A (en) * | 2016-12-22 | 2017-05-10 | 珠海市魅族科技有限公司 | Wearable intelligent terminal power source management method and device |
| US10713987B2 (en) | 2017-10-25 | 2020-07-14 | Shanghai Avic Opto Electronics Co., Ltd. | Display panel and display device |
| CN109546843A (en) * | 2018-11-20 | 2019-03-29 | 广东长虹电子有限公司 | A kind of ultralow standby energy consumption power module |
| CN112083794A (en) * | 2020-09-11 | 2020-12-15 | 深圳市当智科技有限公司 | Power management circuit, electronic product and control method |
| CN112083794B (en) * | 2020-09-11 | 2022-07-08 | 深圳市当智科技有限公司 | Power management circuit, electronic product and control method |
| CN112255940A (en) * | 2020-09-25 | 2021-01-22 | 深圳市当智科技有限公司 | Control circuit, electrical equipment and control method in standby mode |
| CN112735327A (en) * | 2020-12-31 | 2021-04-30 | 威创集团股份有限公司 | Power supply control circuit of LED all-in-one machine and LED all-in-one machine |
| CN114610137A (en) * | 2022-03-11 | 2022-06-10 | 冠捷电子科技(福建)有限公司 | Energy-saving control method and energy-saving framework of display |
| CN114827770A (en) * | 2022-04-02 | 2022-07-29 | 哈工(青岛)交通智能装备科技有限公司 | Wireless sensor low-power consumption processing method based on co-processing chip |
| CN114827770B (en) * | 2022-04-02 | 2022-11-25 | 哈工(青岛)交通智能装备科技有限公司 | Wireless sensor low-power consumption processing method based on co-processing chip |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100818 Termination date: 20130630 |