CN103780854A - Display device standby realizing method, device and circuit and liquid crystal television - Google Patents
Display device standby realizing method, device and circuit and liquid crystal television Download PDFInfo
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- CN103780854A CN103780854A CN201410004800.0A CN201410004800A CN103780854A CN 103780854 A CN103780854 A CN 103780854A CN 201410004800 A CN201410004800 A CN 201410004800A CN 103780854 A CN103780854 A CN 103780854A
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Abstract
The embodiment of the invention provides a display device standby realizing circuit, method and device and a liquid crystal television. The problem that a display device is not able to start a standby state is solved, wherein the problem is caused due to the fact that when the existing display device receives a standby signal and if powering an external load is still carried out, a circuit which powers the external load in a main circuit of a power supply board of the display device does not switch off, and after the external load no longer needs power supply, the part of circuit cannot switch off. The circuit comprises a voltage output circuit which is used for outputting a voltage signal to a first comparison circuit according to current output by a first power supply, and the first comparison circuit which is used for comparing voltage received from the voltage output circuit with first preset voltage set by a setting circuit, instructing a motherboard to switch off the first power supply, and instructing the motherboard to use a second power supply to carry out power supply when the voltage received from the voltage output circuit is less than the first preset voltage, so that the display device is standby.
Description
Technical field
The present invention relates to display device technology field, relate in particular to a kind of display device and realize the method for standby, device, circuit and LCD TV.
Background technology
Concerning all LCD TV, all must realize idle function, domestic standard requires under city's electrical testing, LCD TV standby power is less than 0.5W, current solution is all on master control borad, to increase separately standby MCU, in the time that standby MCU detects remote control standby modulating signal, sends control signal, close mainboard output and the output of power panel main circuit, realize standby power requirement.
The main circuit of the power panel of LCD TV provides two-way output, and a road is output as the LED lamp bar power supply in the LCD TV under normal operating conditions, and another road is output as mainboard and the loud speaker power supply of the LCD TV under normal operating conditions; The main board power supply that one tunnel is output as the LCD TV under holding state is also provided in the power panel of LCD TV, and (this road power output is lower, can meet the requirement of standby power), mainboard can, in the time receiving the signal of end standby, be controlled LCD TV and enter normal operating conditions from holding state.Therefore, LCD TV, in the time receiving standby signal, is understood the output of powered-down plate main circuit, the main board power supply that the circuit that in employing power panel is the main board power supply of the LCD TV under holding state is LCD TV.
Along with the continuous increase of LCD TV function, a lot of LCD TV are all supported plug-in USB load, and the power supply of powering for mainboard and the loud speaker of the LCD TV under normal operating conditions is also plug-in USB load supplying simultaneously.In the time that the standby MCU in LCD TV detects remote control standby modulating signal, if LCD TV is being plug-in USB load supplying, standby MCU can close the output of mainboard so, and the output of partial circuit in the main circuit of powered-down plate, as in power panel being the output of circuit of LED lamp bar part in LCD TV power supply, and be left the output of the circuit of plug-in USB load supplying, but now, the power of LCD TV can not be less than 0.5W conventionally, that is to say, although, LCD TV has been received standby signal, but LCD TV does not enter holding state, now, if plug-in USB load no longer needs power supply, for example, pull out load, or load has been charged, so, circuit for plug-in USB load supplying in the main circuit of power panel also can not be closed, device in this circuit still can power consumption, make the power of LCD TV can not be as much as possible little.
In sum, in the time receiving standby signal, if display device is also being external load power supply, the circuit of powering for external load in the main circuit of the power panel of display device so can not be closed, and no longer need after power supply at external load, this partial circuit can not be closed, and this can cause display device can not enter into holding state.
Summary of the invention
Circuit, method, device and LCD TV that the embodiment of the present invention provides a kind of display device to realize standby, in order to solve existing display device in the time receiving standby signal, if be also external load power supply, the circuit of powering for external load in the main circuit of the power panel of display device so can not be closed, and no longer need after power supply at external load, this partial circuit can not be closed, and this can cause display device can not enter into the problem of holding state.
Based on the problems referred to above, a kind of display device that the embodiment of the present invention provides is realized the circuit of standby, comprises voltage follower circuit, the first comparison circuit and circuit is set;
Described voltage follower circuit, for according to the electric current of the first power supply output to the first comparison circuit output voltage signal; It in the main circuit of the power panel that described the first power supply is display device, is the circuit of the mainboard of this display device under normal operating conditions and the power supply of the external load of this display device; Described voltage signal is proportional to the electric current of described the first power supply output;
Described the first comparison circuit, for by the voltage receiving from described voltage follower circuit, compares with the first predeterminated voltage that circuit setting is set; And in the time that the voltage receiving from described voltage follower circuit is less than the first predeterminated voltage, indicate described mainboard to close described the first power supply, and indicate described mainboard to adopt second source power supply, thus realize the standby of described display device; Described second source is the circuit for the main board power supply of this display device under holding state in the power panel of display device; The electric current that described the first predeterminated voltage is less than described external load need to power time and the resistance of described voltage follower circuit are long-pending, are greater than the electric current of described second source output and the resistance of described voltage follower circuit is amasss.
A kind of display device that the embodiment of the present invention provides is realized the method for standby, comprising:
Determine voltage follower circuit according to the electric current of the first power supply output to the first comparison circuit output voltage signal, being less than the first predeterminated voltage that circuit arranges is set, is the circuit of the mainboard of this display device under normal operating conditions and the power supply of the external load of this display device in the main circuit of the power panel that described the first power supply is display device; Described voltage signal is proportional to the electric current of described the first power supply output; The electric current that described the first predeterminated voltage is less than described external load need to power time and the resistance of described voltage follower circuit are long-pending, are greater than the electric current of second source output and the resistance of described voltage follower circuit is amasss; Described second source is the circuit for the main board power supply of this display device under holding state in the power panel of display device;
Control described mainboard and close described the first power supply, and control described mainboard and adopt the power supply of described second source, thereby realize the standby of described display device.
A kind of display device that the embodiment of the present invention provides is realized the device of standby, comprising:
Determination module, for determining that voltage follower circuit is less than the first predeterminated voltage that circuit arranges is set to the first comparison circuit output voltage signal according to the electric current of the first power supply output, it in the main circuit of the power panel that described the first power supply is display device, is the circuit of the mainboard of this display device under normal operating conditions and the power supply of the external load of this display device; Described voltage signal is proportional to the electric current of described the first power supply output; The electric current that described the first predeterminated voltage is less than described external load need to power time and the resistance of described voltage follower circuit are long-pending, are greater than the electric current of second source output and the resistance of described voltage follower circuit is amasss; Described second source is the circuit for the main board power supply of this display device under holding state in the power panel of display device;
Control module, closes described the first power supply for controlling described mainboard, and controls described mainboard and adopt the power supply of described second source, thereby realizes the standby of described display device.
The LCD TV that the embodiment of the present invention provides, comprises that display device that the embodiment of the present invention provides realizes the circuit of standby.
The beneficial effect of the embodiment of the present invention comprises:
A kind of display device that the embodiment of the present invention provides is realized the circuit of standby, method, device and LCD TV, in the time that display device receives standby signal, close the circuit for display section power supply in the output of mainboard of display device and the power panel of display device, if display device is also being external load power supply, the amassing of first electric current of power supply output and the resistance of voltage follower circuit is to be greater than the first predeterminated voltage that circuit arranges is set so, therefore, the circuit of powering for external load in the power panel of this display device can not be closed, wherein, the first power supply is the circuit for the mainboard of this display device under normal operating conditions and the power supply of the external load of this display device in the main circuit of power panel of this display device, the electric current that the first predeterminated voltage is less than external load need to power time and the resistance of described voltage follower circuit are long-pending, and no longer need after power supply at external load, for example, pull out after load or charging complete, because the electric current of the first power supply output is decreased to the required electric current of mainboard of this display device under holding state, it is the electric current of second source output, long-pending first predeterminated voltage that is less than of resistance of this electric current and voltage follower circuit, therefore, the first comparison circuit indicates the mainboard of this display device to cut out the first power supply, and indicate this mainboard to adopt second source power supply, wherein, second source is the circuit for the main board power supply of this display device under holding state in the power panel of this display device, thereby the main circuit output in the power panel of display device is closed completely, realize the standby of this display device.
Accompanying drawing explanation
The display device that Fig. 1 provides for the embodiment of the present invention is realized one of schematic diagram of the circuit of standby;
The display device that Fig. 2 provides for the embodiment of the present invention realize the circuit of standby schematic diagram two;
The display device that Fig. 3 provides for the embodiment of the present invention realize the circuit of standby schematic diagram three;
The display device that Fig. 4 provides for the embodiment of the present invention is realized one of flow chart of the method for standby;
The display device that Fig. 5 provides for the embodiment of the present invention realize the method for standby flow chart two;
The display device that Fig. 6 provides for the embodiment of the present invention realize the method for standby flow chart three;
The flow chart when method that the display device that Fig. 7 provides for the embodiment of the present invention is realized standby is applied in practice;
The display device that Fig. 8 provides for the embodiment of the present invention is realized the structure chart of the device of standby.
Embodiment
A kind of display device that the embodiment of the present invention provides is realized circuit, method, device and the LCD TV of standby, the electric current of exporting at the first power supply and the resistance of voltage follower circuit are to be amassed while being less than the first predeterminated voltage, the mainboard of indicated number equipment is closed described the first power supply, and indicate this mainboard to adopt second source power supply, thereby realize the standby of described display device, wherein, the first power supply is the circuit for the mainboard of this display device under normal operating conditions and the power supply of the external load of this display device in the main circuit of power panel of display device; Second source is the circuit for the main board power supply of this display device under holding state in the power panel of display device; The electric current when external load that the first predeterminated voltage is less than display device need to be powered and the resistance of voltage follower circuit are long-pending, are greater than the electric current of second source output and the resistance of voltage follower circuit is amasss.
Below in conjunction with Figure of description, the embodiment that a kind of display device that the embodiment of the present invention is provided is realized circuit, method, device and the LCD TV of standby describes.
The display device that the embodiment of the present invention provides is realized the circuit of standby, as shown in Figure 1, comprises voltage follower circuit 11, the first comparison circuit 13 and circuit 12 is set;
The first comparison circuit 13, for by the voltage receiving from voltage follower circuit 11, and arranges the first predeterminated voltage that circuit 12 arranges and compares; And in the time that the voltage receiving from voltage follower circuit 11 is less than the first predeterminated voltage, indicate this mainboard to close the first power supply, and indicate this mainboard to adopt second source power supply, thus realize the standby of this display device; Wherein, second source is the circuit for the main board power supply of this display device under holding state in the power panel of this display device, the electric current when external load that the first predeterminated voltage is less than display device need to be powered and the resistance of voltage follower circuit 11 are long-pending, are greater than the electric current of second source output and the resistance of voltage follower circuit 11 is amasss.
When display device receives after standby signal, if display device is also being external load power supply, the circuit of powering for the display section in display device in the main circuit of the power panel of display device is so closed, the first power supply will be also the external load power supply of display device, therefore, the first power supply can not be closed, and because the mainboard output of display device is closed, therefore, the electric current of the first power supply output can reduce, when the external load of display device no longer needs after power supply, the electric current of the first power supply output can further reduce, make the voltage of voltage follower circuit output be less than the first predeterminated voltage, the display device that adopts the embodiment of the present invention to provide is realized the circuit of standby, the mainboard of meeting indicated number equipment is closed the first power supply, and indicate this mainboard to adopt second source power supply, make display device enter holding state, external load can be the load that is articulated in USB interface.
Preferably, it is long-pending that the first predeterminated voltage is less than the resistance of the required electric current of mainboard this mainboard in the time of normal operating conditions of display device and voltage follower circuit.If display device is in normal operating conditions, the first power supply need to be the main board power supply in the display device under normal operating conditions, to make this mainboard can be by the signal resolution receiving as picture-and-sound, the electric current that the mainboard that is less than this display device due to the first predeterminated voltage this mainboard in the time of normal operating conditions is required and the resistance of voltage follower circuit are long-pending, therefore, even if external load does not need power supply, voltage follower circuit can not be less than the first predeterminated voltage according to the electric current of the first power supply output to the voltage of the first comparison circuit output yet, that is to say, if display device is in running order, even if external load does not need power supply, the display device that adopts the embodiment of the present invention to provide is realized the method for standby, can not close the first power supply yet, can not make display device enter holding state.
Further, the first comparison circuit 13, also for: in the time that the voltage receiving from voltage follower circuit 11 is less than the first predeterminated voltage, if the output of the mainboard of display device is not closed, indicate this mainboard to close the output of self, if the output of the main circuit of the power panel of display device is not closed, close the output of this main circuit, and control the mainboard employing second source power supply of display device; It is long-pending that the first predeterminated voltage is less than the resistance of the required electric current of mainboard this mainboard in the time of normal operating conditions of display device and voltage follower circuit 11.
In the time that display device is worked, the electric current of exporting for the power supply of the main board power supply of display device and the power supply of the external load of display device reduces, it may be also the own fault of mainboard due to display device, as cannot be picture-and-sound by the signal resolution receiving, now, the mainboard of display device also can be controlled power panel and light the screen of display device, and the display device that adopts the embodiment of the present invention to provide is realized after the circuit of standby, can reduce at the electric current of the first power supply output, the voltage signal that power output circuit is exported is decreased to and is less than after the first predeterminated voltage (this display device does not have in the situation of external load), if the output of the mainboard of display device is not closed, indicate this mainboard to close the output of self, if the output of the main circuit of the power panel of display device is not closed, indicate mainboard to close the output of the main circuit of this power panel, and indicate this mainboard to adopt second source power supply, close in the main circuit of power panel of the first power supply and display device the circuit for the display section power supply of display device, and close the output of the mainboard of display device, make display device automatically switch to holding state.That is to say, the display device that adopts the embodiment of the present invention to provide is realized the circuit of standby, can, the in the situation that of display device main board failure, automatically display device be switched to holding state.
Further, the first comparison circuit 13 also for: in the time that the voltage receiving from voltage follower circuit 11 is not less than the first predeterminated voltage, the mainboard of indicated number equipment does not change the main circuit output of the power panel of self and this display device; It is long-pending that the first predeterminated voltage is less than the resistance of the required electric current of mainboard this mainboard in the time of normal operating conditions of this display device and voltage follower circuit 11.
Further, the display device that the embodiment of the present invention provides is realized the circuit of standby, as shown in Figure 2, also comprises voltage stabilizing circuit, and this voltage stabilizing circuit comprises the second comparison circuit 21, transmission circuit 22, control circuit 23 and the first power supply 24;
The second comparison circuit 21, for determining the poor of monitoring voltage and described the first predeterminated voltage, and exports to transmission circuit 22, and monitoring voltage is proportional to the voltage into the power supply output of the mainboard of display device and the power supply of the external load of display device;
The circuit that the display device that the embodiment of the present invention provides is realized standby can adopt the connected mode shown in Fig. 3, and in Fig. 3, the first power supply comprises the first transformer T1, the first diode D1, the first inductance L 1, the 3rd capacitor C 3 and the 4th capacitor C 4; The first power supply is converted to power supply signal by the direct voltage receiving under the control of control circuit 23, the signal that Power is ordered, the mainboard that power supply signal is display device and the power supply of the external load of display device.In Fig. 3, circuit is set and comprises the 5th resistance R 5 and the first adjustable voltage stabilizing didoe N1, the 5th resistance R 5 is biasing resistors, a stable bias current is provided to the first adjustable voltage stabilizing didoe N1, a stable reference voltage of the first adjustable voltage stabilizing didoe N1 output, be the voltage that Ref is ordered, the voltage that Ref is ordered is the first predeterminated voltage.Voltage follower circuit can be the resistance unit of a series and parallel, also can be a resistance, in Fig. 3, voltage follower circuit is the first resistance R 1, the voltage of one end that the first resistance R 1 is connected with the 3rd capacitor C 3, be the voltage signal of voltage follower circuit as the first comparison circuit output, the voltage that Out is ordered is negative pressure for reference ground.
In Fig. 3, the first comparison circuit comprises the first operational amplifier A 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4 and the first capacitor C 1, the electric current of ordering as Power is less, be that the required electric current of the mainboard of display device and the external load of display device is less, while causing voltage that Out orders to be less than divided by the resistance of the second resistance R 2 voltage that Ref orders divided by the resistance of the 3rd resistance R 3, the voltage of the inverting input of the first operational amplifier A 1 is for just, the first operational amplifier A 1 output low level signal, the mainboard of this low level signal indicated number equipment is closed the first power supply, and indicate this mainboard to adopt second source power supply, thereby realize the standby of this display device, if now, the output of this mainboard is not also closed, and so also needs to close the output of mainboard, the electric current of ordering as Power is larger, be that the required electric current of the mainboard of display device and the external load of display device is larger, while causing voltage that Out orders to be greater than divided by the resistance of the second resistance R 2 voltage that Ref orders divided by the resistance of the 3rd resistance R 3, the voltage of the inverting input of the first operational amplifier A 1 is for negative, the first operational amplifier A 1 is exported high level signal, and the mainboard of this high level signal indicated number equipment does not change the output of self and the output of the main circuit of the power panel of display device.Wherein, the 4th resistance R 4 is relevant with the ratio of adjusting feedback, and the 4th resistance R 4 is larger, and resize ratio is larger, and the first capacitor C 1 is less, and feedback speed is faster.
The first comparison circuit in Fig. 3 has adopted the form of adder, and in practice, the first comparator can also adopt comparator, can also adopt Hall switch directly to compare electric current.
In Fig. 3, transmission circuit comprises optical coupler N2 and the tenth resistance R 10.In Fig. 3, the second comparison circuit comprises the second operational amplifier A 2, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9 and the second capacitor C 2, when the voltage of the first power supply output reduces, cause monitoring voltage, be that voltage that Sense is ordered is while reducing, the voltage that the second operational amplifier A 2 is exported reduces, the electric current that flows through the light-emitting diode in optical coupler N2 is reduced, cause the electric current that flows through the phototriode in optical coupler N2 to reduce, therefore, voltage on phototriode in optical coupler N2 reduces, feed back to the feedback voltage of control circuit, be the voltage that Fb is ordered, the voltage that Fb is ordered equals to drive the voltage VCC of the phototriode in optical coupler N2 to deduct the voltage on the phototriode in optical coupler N2, therefore, the voltage that Fb is ordered increases, the difference of the second predeterminated voltage of the voltage that Fb is ordered and control circuit 23 inside increases, the duty ratio of the control signal that control circuit 23 is exported can increase, thereby the voltage of controlling the first power supply output increases.When the voltage of the first power supply output increases, cause monitoring voltage, be that the Sense voltage of ordering is while increasing, the voltage that the second operational amplifier A 2 is exported increases, the electric current that flows through the light-emitting diode in optical coupler N2 is increased, cause the electric current that flows through the phototriode in optical coupler N2 to increase, therefore, voltage on phototriode in optical coupler N2 increases, feed back to the feedback voltage of control circuit, be that the voltage that Fb is ordered equals to drive the voltage VCC of the phototriode in optical coupler N2 to deduct the voltage on the phototriode in optical coupler N2, therefore, the voltage that Fb is ordered reduces, the difference of the second predeterminated voltage of the voltage that Fb is ordered and control circuit 23 inside reduces, the duty ratio of the control signal of control circuit output can reduce, thereby the voltage of controlling the first power supply output reduces.
The second comparison circuit 21, transmission circuit 22 and control circuit 23 in Fig. 2 can together with control the first power supply stable output voltage, this can substitute the voltage stabilizing circuit of the adjustable voltage stabilizing didoe of employing in existing LCD TV, owing to can comprising two operational amplifiers in a common integrated circuit (IC) chip, therefore, adopt the voltage stabilizing circuit shown in Fig. 3, can save device and design space.
The method that a kind of display device that the embodiment of the present invention provides is realized standby is the display device that provides take the embodiment of the present invention circuit of realizing standby as basis, and as shown in Figure 4, the method specifically comprises the following steps:
S401, determine voltage follower circuit according to the electric current of the first power supply output to the first comparison circuit output voltage signal, be less than the first predeterminated voltage that circuit arranges is set, wherein, the first power supply is the circuit for the mainboard of this display device under normal operating conditions and the power supply of the external load of this display device in the main circuit of power panel of display device; The voltage signal of voltage follower circuit output is proportional to the electric current of the first power supply output; The electric current when external load that the first predeterminated voltage is less than this display device need to be powered and the resistance of voltage follower circuit are long-pending, are greater than the electric current of second source output and the resistance of voltage follower circuit is amasss; Second source is the circuit for the main board power supply of this display device under holding state in the power panel of display device;
S402, the mainboard of controlling this display device are closed the first power supply, and control this mainboard and adopt second source power supply, thereby realize the standby of this display device.
In the time that display device receives standby signal, the mainboard of display device can close self output and the power panel of display device in be the circuit of display section power supply, if display device is also being external load power supply, the first power supply can not be closed so, because display device is also being external load power supply, therefore, the amassing of first electric current of power supply output and the resistance of voltage follower circuit is to be greater than the first predeterminated voltage that circuit arranges is set, therefore, mainboard can not closed the first power supply, wherein, the first power supply is the circuit for the mainboard of this display device under normal operating conditions and the power supply of the external load of this display device in the main circuit of power panel of this display device, the electric current that the first predeterminated voltage is less than external load need to power time and the resistance of described voltage follower circuit are long-pending, and no longer need after power supply at external load, for example, pull out after load or charging complete, because the electric current of the first power supply output is decreased to the required electric current of mainboard of this display device under holding state, it is the electric current of second source output, long-pending first predeterminated voltage that is less than of resistance of this electric current and voltage follower circuit, therefore, the method that adopts the display device that provides of the embodiment of the present invention to realize standby can be controlled mainboard and close the first power supply, and to adopt second source be its power supply, wherein, second source is the circuit for the main board power supply of this display device under holding state in the power panel of this display device, thereby the main circuit output in the power panel of display device is closed completely, realize the standby of this display device.
Further, a kind of display device that the embodiment of the present invention provides is realized the method for standby, as shown in Figure 5, also comprises:
S501, determine voltage follower circuit according to the electric current of the first power supply output to the first comparison circuit output voltage signal, be less than the first predeterminated voltage that circuit arranges is set, wherein, the electric current when external load that the first predeterminated voltage is less than this display device need to be powered and the resistance of voltage follower circuit are long-pending, the resistance that is less than the required electric current of mainboard this mainboard in the time of normal operating conditions of display device and voltage follower circuit is long-pending, is greater than the electric current of second source output and the resistance of voltage follower circuit is amasss;
S502, in the time that the output of the mainboard of display device is not closed, close the output of this mainboard, if the output of the main circuit of the power panel of display device do not close, the output of this main circuit, and control this mainboard employing second source power supply, thereby realize the standby of this display device.
In the time that display device is worked, for the power supply of the main board power supply of display device and the power supply of the external load of display device, the electric current of the first power supply output reduces, it may be also the own fault of mainboard due to display device, as cannot be picture-and-sound by the signal resolution receiving, now, the mainboard of display device also can be controlled power panel and light the screen of display device, and the display device that adopts the embodiment of the present invention to provide is realized after the method for standby, can reduce at the electric current of the first power supply output, the voltage signal that power output circuit is exported is decreased to and is less than after the first predeterminated voltage (this display device does not have in the situation of external load), if the output of the mainboard of display device is not closed, close the output of this mainboard, if the output of the main circuit of the power panel of display device is not closed, close the output of the main circuit of this power panel, and control this mainboard employing second source and power, close in the main circuit of power panel of the first power supply and display device the circuit for the display section power supply of display device, and close the output of the mainboard of display device, make display device automatically switch to holding state.That is to say, the display device that adopts the embodiment of the present invention to provide is realized the method for standby, can, the in the situation that of display device main board failure, automatically display device be switched to holding state.
Further, the display device that the embodiment of the present invention provides is realized the method for standby, as shown in Figure 6, also comprises:
S601, determine voltage follower circuit according to the electric current of the first power supply output to the first comparison circuit output voltage signal, be not less than the first predeterminated voltage that circuit arranges is set, wherein, the electric current when external load that the first predeterminated voltage is less than this display device need to be powered and the resistance of voltage follower circuit are long-pending, the resistance that is less than the required electric current of mainboard this mainboard in the time of normal operating conditions of display device and voltage follower circuit is long-pending, is greater than the electric current of second source output and the resistance of voltage follower circuit is amasss;
S602, do not change the output of the main circuit of power panel and the mainboard of this display device of display device.
When the electric current of the first power supply output and the resistance of voltage follower circuit is amasss while being not less than the first predeterminated voltage, if display device receives standby signal, and display device is also being external load power supply, so, until external load does not need power supply, display device just can be switched to holding state; If display device is in normal operating conditions, display device normally shows so.
For the display device that further illustrates the embodiment of the present invention and provide is realized the method for standby, apply process in practice take the method below and describe as example.The method that the display device that the embodiment of the present invention provides is realized standby is applied flow process in practice as shown in Figure 7, comprising:
S701, judge whether voltage follower circuit is less than the first predeterminated voltage according to the electric current of the first power supply output to the voltage signal of comparison circuit output, if so, carries out S702, otherwise, S703 carried out;
In practice, the mainboard of display device required electric current in the time of holding state, be external load that second source output current the is less than display device electric current need to power time, the mainboard that the electric current when external load of display device need to be powered is less than display device required electric current in the time of normal operating conditions.Therefore, the electric current when external load that the first predeterminated voltage is less than display device need to be powered and the resistance of voltage follower circuit are long-pending, are greater than the electric current of second source output and the resistance of voltage follower circuit is amasss.
If the main circuit in the power panel of S702 display device is not closed, control the main circuit of the power panel of display device and close, and in the time that the output of the mainboard of display device is not closed, close the output of this mainboard, and control this mainboard and adopt second source power supply;
S703, do not change the output of the main circuit of power panel and the mainboard of this display device of display device.
Based on same inventive concept, the embodiment of the present invention also provides a kind of display device to realize the device of standby, the method that the principle of dealing with problems due to this device realizes standby to aforementioned display device is similar, therefore the enforcement of this device can be referring to the enforcement of preceding method, repeats part and repeat no more.
The display device that the embodiment of the present invention provides is realized the device of standby, as shown in Figure 8, comprising:
Further, the electric current that the mainboard that control module 82 is also less than display device for: the first predeterminated voltage this mainboard in the time of normal operating conditions is required and the resistance of voltage follower circuit are long-pending, the electric current of exporting according to the first power supply at definite voltage follower circuit is after the first comparison circuit output voltage signal is less than the first predeterminated voltage, if the output of this mainboard is not closed, close the output of this mainboard, if the output of the main circuit of the power panel of display device is not closed, close the output of this main circuit, and control the mainboard employing second source power supply of display device.
Further, determination module 81 also for: determine that voltage follower circuit is not less than described the first predeterminated voltage according to the electric current of the first power supply output to the first comparison circuit output voltage signal, the first predeterminated voltage is less than the amassing of resistance of the required electric current of mainboard this mainboard in the time of normal operating conditions of described display device and described voltage follower circuit;
A kind of LCD TV that the embodiment of the present invention provides comprises that display device that the embodiment of the present invention provides realizes the circuit of standby.
Through the above description of the embodiments, those skilled in the art can be well understood to the embodiment of the present invention and can realize by hardware, and the mode that also can add necessary general hardware platform by software realizes.Based on such understanding, the technical scheme of the embodiment of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise that some instructions are in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) carry out the method described in each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device in embodiment can be distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from the present embodiment.The module of above-described embodiment can be merged into a module, also can further split into multiple submodules.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (11)
1. display device is realized a circuit for standby, it is characterized in that, comprises voltage follower circuit, the first comparison circuit and circuit is set;
Described voltage follower circuit, for according to the electric current of the first power supply output to the first comparison circuit output voltage signal; It in the main circuit of the power panel that described the first power supply is display device, is the circuit of the mainboard of this display device under normal operating conditions and the power supply of the external load of this display device; Described voltage signal is proportional to the electric current of described the first power supply output;
Described the first comparison circuit, for by the voltage receiving from described voltage follower circuit, compares with the first predeterminated voltage that circuit setting is set; And in the time that the voltage receiving from described voltage follower circuit is less than the first predeterminated voltage, indicate described mainboard to close described the first power supply, and indicate described mainboard to adopt second source power supply, thus realize the standby of described display device; Described second source is the circuit for the main board power supply of this display device under holding state in the power panel of display device; The electric current that described the first predeterminated voltage is less than described external load need to power time and the resistance of described voltage follower circuit are long-pending, are greater than the electric current of described second source output and the resistance of described voltage follower circuit is amasss.
2. circuit as claimed in claim 1, it is characterized in that, described the first comparison circuit also for: in the time that the voltage receiving from voltage follower circuit is less than the first predeterminated voltage, if the output of described mainboard is not closed, indicate described mainboard to close the output of self, if the output of the main circuit of the power panel of display device is not closed, close the output of this main circuit, and control the mainboard employing second source power supply of display device; The mainboard that described the first predeterminated voltage is less than described display device in the time of normal operating conditions described in the resistance of the required electric current of mainboard and described voltage follower circuit long-pending.
3. circuit as claimed in claim 1, is characterized in that, described the first comparison circuit also for:
In the time that the voltage receiving from voltage follower circuit is not less than the first predeterminated voltage, indicate described mainboard not change the main circuit output of the power panel of self and display device; The mainboard that described the first predeterminated voltage is less than described display device in the time of normal operating conditions described in the resistance of the required electric current of mainboard and described voltage follower circuit long-pending.
4. circuit as claimed in claim 1, is characterized in that, also comprises voltage stabilizing circuit, and described voltage stabilizing circuit comprises the second comparison circuit, transmission circuit, control circuit and the first power supply;
Described the second comparison circuit, for determining the poor of monitoring voltage and described the first predeterminated voltage, and exports to described transmission circuit, and described monitoring voltage is proportional to the voltage of described power supply output;
Described transmission circuit, for determining the poor of the definite voltage difference of the second predeterminated voltage and described the second comparison circuit, and exports to control circuit;
Described control circuit, for in the time that the voltage difference of described transmission circuit output is less than the second predeterminated voltage, control the voltage that the first power supply increases output signal, and in the time that the voltage difference of described transmission circuit output is greater than the second predeterminated voltage, control the voltage that the first power supply reduces output signal, and in the time that the voltage difference of described transmission circuit output equals the second predeterminated voltage, control the first power supply does not change the voltage of output signal.
5. display device is realized a method for standby, it is characterized in that, comprising:
Determine voltage follower circuit according to the electric current of the first power supply output to the first comparison circuit output voltage signal, being less than the first predeterminated voltage that circuit arranges is set, is the circuit of the mainboard of this display device under normal operating conditions and the power supply of the external load of this display device in the main circuit of the power panel that described the first power supply is display device; Described voltage signal is proportional to the electric current of described the first power supply output; The electric current that described the first predeterminated voltage is less than described external load need to power time and the resistance of described voltage follower circuit are long-pending, are greater than the electric current of second source output and the resistance of described voltage follower circuit is amasss; Described second source is the circuit for the main board power supply of this display device under holding state in the power panel of display device;
Control described mainboard and close described the first power supply, and control described mainboard and adopt the power supply of described second source, thereby realize the standby of described display device.
6. method as claimed in claim 5, it is characterized in that, the mainboard that described the first predeterminated voltage is less than described display device in the time of normal operating conditions described in the resistance of the required electric current of mainboard and described voltage follower circuit long-pending, the electric current of exporting according to the first power supply at definite voltage follower circuit is after the first comparison circuit output voltage signal is less than described the first predeterminated voltage, and described method also comprises:
If the output of described mainboard is not closed, close the output of described mainboard, if the output of the main circuit of the power panel of display device is not closed, close the output of this main circuit, and control the mainboard employing second source power supply of display device.
7. method as claimed in claim 6, is characterized in that, described method also comprises:
Determine that voltage follower circuit is not less than described the first predeterminated voltage according to the electric current of the first power supply output to the first comparison circuit output voltage signal; The mainboard that described the first predeterminated voltage is less than described display device in the time of normal operating conditions described in the resistance of the required electric current of mainboard and described voltage follower circuit long-pending;
Do not change the output of main circuit and the described mainboard of described power panel.
8. display device is realized a device for standby, it is characterized in that, also comprises:
Determination module, for determining that voltage follower circuit is less than the first predeterminated voltage that circuit arranges is set to the first comparison circuit output voltage signal according to the electric current of the first power supply output, it in the main circuit of the power panel that described the first power supply is display device, is the circuit of the mainboard of this display device under normal operating conditions and the power supply of the external load of this display device; Described voltage signal is proportional to the electric current of described the first power supply output; The electric current that described the first predeterminated voltage is less than described external load need to power time and the resistance of described voltage follower circuit are long-pending, are greater than the electric current of second source output and the resistance of described voltage follower circuit is amasss; Described second source is the circuit for the main board power supply of this display device under holding state in the power panel of display device;
Control module, closes described the first power supply for controlling described mainboard, and controls described mainboard and adopt the power supply of described second source, thereby realizes the standby of described display device.
9. device as claimed in claim 8, is characterized in that, described control module also for:
The mainboard that described the first predeterminated voltage is less than described display device in the time of normal operating conditions described in the resistance of the required electric current of mainboard and described voltage follower circuit long-pending, the electric current of exporting according to the first power supply at definite voltage follower circuit is after the first comparison circuit output voltage signal is less than described the first predeterminated voltage, if the output of described mainboard is not closed, close the output of described mainboard, if the output of the main circuit of the power panel of display device is not closed, close the output of this main circuit, and control the mainboard employing second source power supply of display device.
10. device as claimed in claim 8, is characterized in that, described determination module also for:
Determine that voltage follower circuit is not less than described the first predeterminated voltage according to the electric current of described the first power supply output to the first comparison circuit output voltage signal, the mainboard that described the first predeterminated voltage is less than described display device in the time of normal operating conditions described in the amassing of resistance of the required electric current of mainboard and described voltage follower circuit;
Described control module also for:
Do not change the output of main circuit and the described mainboard of described power panel.
11. 1 kinds of LCD TV, is characterized in that, comprise that the display device as described in claim 1-4 any one realizes the circuit of standby.
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| CN201410004800.0A CN103780854B (en) | 2014-01-06 | 2014-01-06 | Display device standby realizing method, device and circuit and liquid crystal television |
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| CN103780854B (en) | 2017-01-25 |
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Address after: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee after: Hisense Video Technology Co.,Ltd. Address before: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee before: HISENSE ELECTRIC Co.,Ltd. |
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