CN1866705B - Apparatus for supplying power source - Google Patents
Apparatus for supplying power source Download PDFInfo
- Publication number
- CN1866705B CN1866705B CN2006100803941A CN200610080394A CN1866705B CN 1866705 B CN1866705 B CN 1866705B CN 2006100803941 A CN2006100803941 A CN 2006100803941A CN 200610080394 A CN200610080394 A CN 200610080394A CN 1866705 B CN1866705 B CN 1866705B
- Authority
- CN
- China
- Prior art keywords
- voltage
- display device
- switch
- circuit
- resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3258—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Dc-Dc Converters (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of El Displays (AREA)
Abstract
The present invention relates to an apparatus for supplying power source for providing certain voltage to a first display device and a second display device. The apparatus for supplying power source includes a boosting circuit, a boosted voltage detecting circuit and an output selecting circuit. The boosting circuit boosts a battery voltage. The boosted voltage detecting circuit detects the boosted battery voltage, and transmits the detection result to the boosting circuit. The output selecting circuit is coupled to the boosting circuit and the boosted voltage detecting circuit, and provides selectively the boosted battery voltage to a first display device and a second display device. The apparatus provides certain voltages which are different with each other to a first display device and/or a second display device, and thus the size of a dual panel apparatus employing the display devices may be reduced.
Description
Technical field
The present invention relates to be used for the device of power supply.More specifically, the present invention relates to be used for the device of power supply, to first display unit and the second display unit power supply.
Background technology
The device that is used for power supply points to the device that the display device supply drives the required power supply of this display device.
Fig. 1 is the view that expression is used for the common apparatus of power supply.
In Fig. 1, the device that is used for power supply comprises booster circuit 106 and boosts testing circuit 108.
Booster circuit 106 comprises the integrated chip 110 that boosts, inductance L and diode D.
The integrated chip 110 that boosts makes from the voltage of battery 102 outputs, and for example the voltage of 3.7V is promoted to predetermined voltage, for example 18V.Therefore, first node N1 has the voltage that is promoted by booster circuit 106, and the voltage of first node N1 is provided to display device 104.
The testing circuit 108 of boosting detects the cell voltage that is promoted by booster circuit 106, the voltage of the voltage of first node N1 and Section Point N2 for example, and subsequently the voltage of Section Point N2 is provided to the feedback terminal FB of the integrated chip 110 that boosts.This testing circuit 106 that boosts (should be " 108 ") comprises resistor R 1 and R2 and capacitor C1 and C2.
Capacitor C1 and C2 make the voltage that provides to the first node N1 of display unit 104 become stable.
Integrated chip 110 its step-up ratio of voltage adjustment according to the Section Point N2 that provides from the testing circuit 108 that boosts boosts
In brief, the device 100 that is used for power supply only provides predetermined voltage to a display device 104.
Yet recently, such as two display unit of dual panel apparatus employing of portable terminal and kneetop computer, thereby and should comprise the device of two power supplies, to drive these display devices.Therefore, the size of this dual panel apparatus is increased.
Summary of the invention
Characteristic of the present invention provides a kind of power supply device that is used for providing to a plurality of display devices power supply.
A kind of device that is used for power supply comprises booster circuit, testing circuit and output select circuit boost.The boosting circuit boosts cell voltage.The testing circuit that boosts detects the cell voltage that promotes, and sends testing result to this booster circuit.Output select circuit is connected to the booster circuit and the testing circuit that boosts, and selectively the cell voltage of lifting is provided to first display device and second display device.This booster circuit comprises the first node and first signal terminal, wherein exports the cell voltage that promotes by first node, and imports first control signal by first signal terminal.The said testing circuit that boosts comprise the Section Point that is connected to first node, to the booster circuit transmission by the 3rd node, first resistor, first capacitor of the detected testing result of testing circuit of boosting, be connected second resistor, the 3rd resistor, first switch between the 3rd node and the ground and be connected Section Point and ground between second capacitor; Wherein first resistor and first capacitor are connected in parallel with each other between Section Point and the 3rd node, and the 3rd resistor and first switch are one another in series and are connected between the 3rd node and the ground.Said output select circuit comprises: be connected the second switch between the Section Point and second display device, be connected to the 3rd switch and inverter between the Section Point and first display device; First switch and second switch are by second control signal control from the secondary signal terminal, and said inverter provides the inversion signal of second control signal to the 3rd switch; Second switch is identical N-MOS transistor with the 3rd switch.
A kind of power supply device according to another embodiment of the present invention comprises booster circuit, voltage-regulating circuit and output circuit.The boosting circuit boosts cell voltage; Said booster circuit comprises: the first node of the cell voltage that output promotes; Input has first signal terminal of first control signal; Be configured to promote the integrated chip that boosts of said cell voltage, be connected to the inductance of the said integrated chip that boosts, and the diode (D1) that is connected to said inductance.Voltage-regulating circuit control booster circuit; Make this booster circuit that cell voltage is promoted to first voltage or second voltage, said voltage-regulating circuit comprises: be connected to the end that the Section Point of first node, second resistor (R2) that is connected the end that first resistor (R1) between the feedback terminal (FB) of Section Point and the said integrated chip that boosts, feedback terminal (FB) that an end is connected to the said integrated chip that boosts and the other end be connected to first switch, feedback terminal (FB) that an end is connected to the said integrated chip that boosts and the other end be connected to second switch the 3rd resistor (R3), be configured to said first switch that switch is connected between the said other end of second resistor (R2) and ground and be configured to the said second switch that switch connects between the said other end of the 3rd resistor (R3) and a said end that the said other end with second resistor (R2) of first switch is connected.Output circuit provides first voltage to first display device, is reduced to second voltage, and second voltage that will reduce provides to second display device, and wherein said second voltage has the size that is different from said first voltage.
As stated, this power supply device provides specific voltage to first display unit and/or second display unit, thereby and can reduce the size of the dual panel apparatus that adopts these display unit.
Description of drawings
When combining accompanying drawing to consider, through with reference to following detailed description, become obvious with further feature with naming a person for a particular job above of the present invention, wherein:
Fig. 1 is the view that expression is used for the common apparatus of power supply;
Fig. 2 representes the block diagram of power supply device according to an embodiment of the invention;
Fig. 3 is the view of circuit of the power supply device of presentation graphs 2;
Fig. 4 representes the block diagram of power supply device according to another embodiment of the present invention;
Fig. 5 representes the view of the circuit of the power supply device of Fig. 4 according to an embodiment of the invention.
Embodiment
Explain the preferred embodiments of the present invention in further detail below with reference to accompanying drawing.
Fig. 2 representes the block diagram of power supply device according to an embodiment of the invention.
In Fig. 2, power supply device 200 of the present invention comprises booster circuit 208, testing circuit 210 and output select circuit 212 boost.
In one embodiment of the invention, first display device 204 is LCDs, and second display device 206 is organic electroluminescent devices.
In another embodiment of the present invention, each in the display device 204 and 206 is organic electroluminescent device.
In another embodiment of the present invention, display device 204 and 206 can be used as the display part of portable terminal.
The testing circuit 210 that boosts detects the cell voltage that is promoted by booster circuit 208, and testing result is sent to booster circuit 208.Booster circuit 208 is analyzed the testing result of sending from the testing circuit 210 that boosts, and analyzes adjustment its step-up ratio, for example duty ratio according to these.
For example, with providing voltage to be preset as 18V to first display device 204.
Therefore, booster circuit 208 detects cell voltage through the testing result of sending from the testing circuit 210 that boosts and is promoted to 17.5V, and increases its step-up ratio, so that cell voltage is promoted to 18V.For example, if booster circuit 208 through utilize comprising the ON/OFF ratio of switch (not shown), promptly duty ratio promotes this cell voltage, then booster circuit 208 promotes its duty ratio according to the testing result of sending from the testing circuit 210 that boosts.In other words, booster circuit 208 is promoted to 18V through adjusting its duty ratio with cell voltage.
Device of the present invention 200 is promoted to desired voltage through said process with cell voltage.
Output select circuit 212 is connected to booster circuit 208 and boosts testing circuit 210, and to first display device 204 and second display device 206 cell voltage that is promoted by booster circuit 208 is provided.
After this, will specify the operation of output select circuit 212 with reference to portable terminal.
This portable terminal uses first display device 204 as main display part, and uses second display device 206 as secondary display part.
At portable terminal is under renovating of folder-type terminal and this portable terminal situation about opening, and first display device 204 is connected, and second display device 206 breaks off.In this case, the output select circuit 212 of device 200 of the present invention provides the cell voltage that is promoted by booster circuit 208 to first display device 204.
Renovate the following time of condition of closing and operate in it at this portable terminal, first display device 204 breaks off, and second display device 206 is connected.In this case, output select circuit 212 provides the cell voltage that is promoted by booster circuit 208 to second display device 206.
On the other hand, the lifting degree of cell voltage is confirmed by the booster circuit 208 and the testing circuit 210 that boosts.This will explain with reference to accompanying drawing in further detail.
In brief, power supply device 200 of the present invention provides power supply to first display device 204 or second display device 206, is unlike in the power supply device described in the background technology.Therefore, under the situation of dual panel apparatus, for example use the portable terminal of device 200 of the present invention, device 200 can be to first display device 204 and second display device, 206 power supplies.As a result, can reduce the size of this dual panel apparatus.
Fig. 3 representes the view of the circuit of the power supply device of Fig. 2 according to an embodiment of the invention.
In Fig. 3, booster circuit 208 comprises the integrated chip 220 that boosts, inductance L and the diode D that activates according to the control signal that provides from first signal terminal.
The testing circuit 210 that boosts is connected to booster circuit 208, and comprises first resistor R 1, the second and the 3rd resistor R 2 and R3, the first switch T1 and capacitor C1 and C2.Wherein, resistor R 2 is connected to first resistor R 1 with R3, and is connected in parallel to each other.
Output select circuit 212 comprises second switch T2 and is connected to the inverter of the first switch T1, and the 3rd switch T3 that connects with this inverter.
Specify the operation of device 200 of the present invention below.Wherein, the first switch T1 is the P-MOS transistor, and second switch T2 and T3 are the N-MOS transistor.In addition, the voltage of 20V is provided to first display device 204, and the voltage of 18V is provided to second display device 206.
At first, first switch turn-offs according to the control signal that provides from secondary signal terminal S2.In this case, second switch T2 conducting, and the 3rd switch T3 turn-offs.In addition, the testing circuit 210 that boosts is made up of with R2 the resistor R 1 of series connection.
When booster circuit 208 promoted cell voltage, the testing circuit 210 that boosts detected the voltage of the 3rd node N3.For example, when the voltage of Section Point N2 was 18V, the voltage of supposing the 3rd node N3 was 1.5V.
The testing circuit 210 that boosts detects the voltage of the 3rd node N3, for example, detects the 1.3V voltage of the 3rd node N3, and it is corresponding to the 16V voltage of Section Point N2.
Next, the testing circuit 210 that boosts provides the 1.3V voltage of the 3rd node N3 to the FB of the integrated chip 220 that boosts.As a result, the integrated chip 220 that boosts detects cell voltage and is not promoted to predetermined voltage (18V), and therefore improves its step-up ratio.
Through said process, Section Point has the voltage of 18V, and the voltage of Section Point N2 is provided to second display device 206.
Secondly, in the first switch T1 conducting, under the situation of second switch T2 shutoff and the 3rd switch T3 conducting.Thereby parallel resistor device R2 and R3 are connected to first resistor R 1.
Here, because the second and the 3rd resistor R 2 and R3 parallel connection, the resistance that is therefore formed by resistor R 2 and R3 is less than the resistance of second resistor R 2.As a result, the voltage of the 3rd node N3 when the 3rd resistor R 3 is connected to second resistor R 2 is less than the voltage of the 3rd node N3 when the 3rd resistor R 3 is not connected to second resistor R 2.For example, have at Section Point N2 under the situation of 16V, the voltage of the 3rd node N3 is not 1.3V when the 3rd resistor R 3 is connected to second resistor R 2.Yet the voltage of the 3rd node N3 is 1.2V when the 3rd resistor R 3 is connected to second resistor R 2.Therefore, when the 3rd resistor R 3 was connected to second resistor R 2, the integrated chip 220 that boosts improved its step-up ratio and is higher than the step-up ratio when the 3rd resistance R 3 is not connected to second resistor R 2, and therefore Section Point N2 has the 20V that is higher than 18V.This 20V voltage is provided to first display device 204.
In brief, device 200 of the present invention provides the voltage with different sizes to first display device 204 and second display device 206 through utilizing the first switch T1 and resistor R 2 with R3 selectively.
Installing according to another embodiment of the present invention in 200, the testing circuit 210 that boosts can comprise at least three resistors that are connected to first resistor R 1, and these resistors are connected in parallel to each other.
Fig. 4 representes the block diagram of power supply device according to another embodiment of the present invention.
In Fig. 4, power supply device 400 of the present invention comprises booster circuit 410, voltage-regulating circuit 412 and output circuit 414.
Output circuit 414 provides the voltage that is promoted by booster circuit 410 to first display device 404 and/or second display device 406, and has switching circuit 416 and reduction voltage circuit 418.
Fig. 5 representes the view of the circuit of the power supply device of Fig. 4 according to an embodiment of the invention.
In Fig. 5, booster circuit 410 is made up of the integrated chip 500 that boosts, inductance L and the first diode D1.
Be described below, the integrated chip 500 of boosting utilize comprising the switch (not shown) promote from the cell voltage of battery 402 outputs.
At first, switch turn-offs, and therefore cell voltage is stored in the inductance L.
Next, switch conduction, and charge into the electric charge of inductance L so exported to first node N1.
Then, switch turn-offs, and therefore cell voltage is stored in the inductance L.
Next, switch conduction, and charge into the electric charge of inductance L so exported to first node N1.
In other words, repeat conducting/stopcock, and therefore promote cell voltage.As a result, first node N1 has the cell voltage of lifting.Here, the on/off of switch ratio refers to duty ratio.
Then, when the cell voltage that promotes was higher than the threshold voltage of the first diode D1, the circuit of exporting from inductance L was provided to Section Point N2 through the first diode D1.As a result, Section Point N2 has the cell voltage that is promoted by booster circuit 410.
To specify each element of device 400 below continuously.
Voltage-regulating circuit 412 comprises the first capacitor C1, the second diode D2, first resistor R 1, second resistor R 2, the 3rd resistor R 3, the first switch T1, second switch T2, the second capacitor C2 and the 3rd capacitor C3.
The first capacitor C1 is connected to booster circuit 410, and the second diode D2 is connected to the first capacitor C1 and boosts integrated chip 500.The first capacitor C1 and the second diode D2 make the voltage to the FB of the integrated chip 500 that boosts input, and promptly the voltage of the 3rd node N3 becomes stable.
When according to from control signal conducting second switch T2 that the 3rd signal terminal S3 provides the time, the 3rd resistance R 3 is parallelly connected with second resistor R 2.In other words, the 3rd resistor R 3 is the resistors that are used to adjust booster circuit 410 step-up ratios.
Installing according to another embodiment of the present invention in 400, each switch T1 and T2 are MOS transistors, are preferably the N-MOS transistor.
Installing according to another embodiment of the present invention in 400, can between the gate terminal of the first transistor T1 and ground, be connected the 4th resistor R 4, with protection the first transistor T1.In addition, can between the gate terminal of transistor seconds T2 and ground, be connected the 5th resistor R 5, with protection transistor seconds T2.
The second and the 3rd capacitor C2 and C3 make the voltage that provides to display device 404 and 406, and promptly the voltage of Section Point N2 becomes stable.
In addition, reduction voltage circuit 418 can further comprise the 6th resistor R 6 and the 4th capacitor C4.
The 6th resistor R 6 as high-fall piezoresistance device is connected between the EN and earth terminal GND of LDO pressurizer 502, and makes the digital signal of the earth terminal GND that inputs to LDO pressurizer 502 stable.
The 4th capacitor C4 makes from the output of LDO pressurizer and provides stable to the voltage of second display device 406.
Specify the operation of device 400 of the present invention below.
In first embodiment, switching circuit 416 conductings, and LDO pressurizer 502 does not activate according to the control signal of sending from the 5th Signal Terminal S5.In addition, work as cell voltage, when for example the voltage of 3.7V is promoted to 20V, suppose that the 3rd node N3 has 9V.
In this case, the first switch T1 and second switch T2 conducting.Here, be under the situation of 16V at the cell voltage that promotes by booster circuit 410, voltage-regulating circuit 412 is 7V according to the voltage that the distribution of resistor R 1 to R3 detects the 3rd node N3.
Next, voltage-regulating circuit 412 provides the voltage of the 3rd node N3 of detection to the integrated chip 500 that boosts.
In this case, the detection voltage detecting of integrated chip 500 through the 3rd node N3 that provides from voltage-regulating circuit 412 of boosting is not promoted to desired voltage (20V) to cell voltage.Therefore, the integrated chip 500 that boosts is promoted to desired voltage (20V) through adjusting its duty ratio with cell voltage.Here, through switching circuit 416 the 20V voltage that promotes is provided to first display device 404.
In a second embodiment, switching circuit 416 turn-offs, and activates LDO pressurizer 502 according to the control signal of sending from the 5th signal terminal S5.In addition, work as cell voltage, when for example the voltage of 3.7V is promoted to 18V, suppose that the 3rd node N3 has 9V.
In this case, the first switch T1 conducting, and second switch T2 turn-offs.Here, be under the situation of 16V at the cell voltage that promotes by booster circuit 410, voltage-regulating circuit 412 is 8V according to the voltage that the distribution of resistor R 1 and R2 detects the 3rd node N3.
Next, voltage-regulating circuit 412 provides the detection voltage of the 3rd node N3 to the FB of the integrated chip 500 that boosts.
In this case, the voltage detecting of integrated chip 500 through the 3rd node N3 that provides from voltage-regulating circuit 412 of boosting is not promoted to desired voltage (18V) to cell voltage.Therefore, the integrated chip 500 that boosts is promoted to desired voltage (18V) through adjusting its duty ratio with cell voltage.Here, reduce the 18V cell voltage that promotes through reduction voltage circuit 418, and then the voltage that reduces is provided to second display device 406.
Relatively method among first embodiment and the method among second embodiment below.
In first embodiment, because first and second switch T1 and T2 conducting, so resistor R 2 is connected in parallel to each other with R3.Yet, in a second embodiment,, therefore only activate second resistor R 2 of resistor R 2 and R3 because the first switch T1 conducting and second switch T2 turn-off.Therefore, when the cell voltage that is promoted by booster circuit 410 was 16V, the 3rd node N3 had 7V in first embodiment, but has 8V in a second embodiment.As a result, the cell voltage that in first embodiment, is promoted by booster circuit 410 is 20V, and is 18V in a second embodiment.Therefore, the 20V voltage that promotes is provided to first display device 404.In addition, the 18V voltage of lifting is reduced by reduction voltage circuit 418, and the voltage that will reduce then provides to second display device 406.
In a second embodiment, if second switch T2 conducting as first embodiment, the cell voltage of this lifting is 20V so.So, the 20V cell voltage of this lifting is reduced by voltage-regulating circuit 418, and the voltage that will reduce provides to second display device 406.
Therefore, in a second embodiment, but the power consumption of device 400 is higher than the power consumption of device 400 when second switch T2 turn-offs during second switch T2 conducting.Therefore, in a second embodiment, second switch T2 turn-offs, and therefore can reduce the power consumption of device 400.
In brief, and the device 400 of invention reduce its power consumption through suitably merging resistor R 1 to R3.For example, when first display device, under the situation of the main display part of dual panel apparatus, first voltage is provided to first display device 400.Yet, when second display device 406, under the situation of the secondary display part of this dual panel apparatus, reduce second voltage less than first voltage, with the power consumption of intensifier 400, and the voltage that will reduce then provides to second display device 406.
In the 3rd embodiment, switching circuit 416 conductings, and according to the control signal activation LDO pressurizer 502 that sends from the 5th signal terminal S5.
In this case, will be by the cell voltage of booster circuit 410 liftings, for example 20V voltage provides to first display device 404.In addition, reduce the 20V cell voltage that promotes by reduction voltage circuit 418, and the voltage that will reduce then provides to second display device 406.
In brief, power supply device 400 of the present invention can provide corresponding power supply to first display device 404 and/or second display device 406 of dual panel apparatus.
Through the preferred embodiments of the present invention, notice according to above-mentioned aim and can make amendment and be out of shape by those skilled in the art.Therefore it should be understood that and in scope of the present invention that is defined by the following claims and spirit, can change specific embodiment of the present invention.
Claims (14)
1. device that is used for power supply comprises:
Be configured to promote the booster circuit of cell voltage, this booster circuit comprises the first node and first signal terminal, wherein exports the cell voltage that promotes by first node, and imports first control signal by first signal terminal;
Be configured to detect the cell voltage of lifting, and send the testing circuit that boosts of said testing result to said booster circuit; And
Be connected to the output select circuit of said booster circuit and the said testing circuit that boosts, dispose it and cell voltage of lifting optionally is provided to first display device and second display device,
Wherein, The said testing circuit that boosts comprises the Section Point that is connected to first node; To three node of booster circuit transmission by the detected testing result of testing circuit of boosting; First resistor; First capacitor; Be connected second resistor between the 3rd node and the ground; The 3rd resistor; First switch and be connected Section Point and ground between second capacitor; Wherein first resistor and first capacitor are connected in parallel with each other between Section Point and the 3rd node; The 3rd resistor and first switch are one another in series and are connected between the 3rd node and the ground
Wherein, said output select circuit comprises: be connected the second switch between the Section Point and second display device, be connected to the 3rd switch between the Section Point and first display device, and inverter; First switch and second switch are by second control signal control from the secondary signal terminal, and said inverter provides the inversion signal of second control signal to the 3rd switch; And
Wherein, second switch is identical N-MOS transistor with the 3rd switch.
2. the described device of claim 1, wherein said first switch is the P-MOS transistor.
3. the described device of claim 1, wherein said first display device is first display part of dual panel apparatus, and second display device is second display part of said dual panel apparatus.
4. the described device of claim 3, wherein said first display device is a LCD, and said second display device is an organic electroluminescent device.
5. device that is used for power supply comprises:
Be configured to promote the booster circuit of cell voltage; Said booster circuit comprises: the first node of the cell voltage that output promotes; Input has first signal terminal of first control signal; Be configured to promote the integrated chip that boosts of said cell voltage, be connected to the inductance of the said integrated chip that boosts, and the diode (D1) that is connected to said inductance;
Be configured to control the voltage-regulating circuit of said booster circuit; Make said booster circuit that said cell voltage is promoted to first voltage or second voltage, said voltage-regulating circuit comprises: be connected to the 3rd resistor (R3) of the end that the Section Point of first node, second resistor (R2) that is connected the end that first resistor (R1) between the feedback terminal (FB) of Section Point and the said integrated chip that boosts, the feedback terminal (FB) and the other end that an end is connected to the said integrated chip that boosts be connected to first switch, feedback terminal (FB) that an end is connected to the said integrated chip that boosts and the other end be connected to second switch, the said second switch that is configured to said first switch that switch is connected between the said other end of second resistor (R2) and ground and is configured to switch connection between the said other end of the 3rd resistor (R3) and a said end that the said other end with second resistor (R2) of first switch is connected; And
Output circuit disposes it and to first display device first voltage is provided, and reduces said second voltage, and to second display device second voltage of said reduction is provided,
Wherein said second voltage has the size that is different from said first voltage.
6. the described device of claim 5, wherein said output circuit comprises:
Be configured to the switching circuit that switch is connected between said booster circuit and said first display device; And
Be configured to reduce second voltage, and the reduction voltage circuit of second voltage of said reduction be provided to said second display device from said booster circuit output.
7. the described device of claim 6, wherein said switching circuit comprises MOS transistor.
8. the described device of claim 6, wherein said second voltage is less than said first voltage.
9. the described device of claim 6, wherein said reduction voltage circuit comprises:
The LDO pressurizer that between said booster circuit and said second display device, is connected;
The 6th resistor (R6) that is connected between terminal (EN) of enabling at the earth terminal (GND) of said LDO pressurizer and said LDO pressurizer;
Adjust the 7th resistor (R7) that is connected between terminal (ADJ) at the earth terminal (GND) of said LDO pressurizer and the output voltage of said LDO pressurizer; And
Adjust the resistor (R8) that is connected between terminal (ADJ) at the lead-out terminal (VOUT) of said LDO pressurizer and the output voltage of said LDO pressurizer.
10. the described device of claim 5, wherein said voltage-regulating circuit utilizes a plurality of resistors to control said booster circuit.
11. the described device of claim 5, wherein at least one said switch is processed by MOS transistor.
12. the described device of claim 5 further comprises:
Be configured to provide the battery of said cell voltage to said booster circuit.
13. the described device of claim 5, one or more in wherein said first display device and said second display device are organic electroluminescent devices.
14. the described device of claim 5, wherein said first display device is the main display part of dual panel apparatus, and said second display device is the secondary display part of said dual panel apparatus.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2005-0039599 | 2005-05-12 | ||
| KR1020050039599 | 2005-05-12 | ||
| KR1020050039599A KR100682991B1 (en) | 2005-05-12 | 2005-05-12 | Method of supplying power source and apparatus for performing the same |
| KR10-2005-0086708 | 2005-09-16 | ||
| KR1020050086708 | 2005-09-16 | ||
| KR20050086708 | 2005-09-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1866705A CN1866705A (en) | 2006-11-22 |
| CN1866705B true CN1866705B (en) | 2012-06-13 |
Family
ID=37425613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100803941A Active CN1866705B (en) | 2005-05-12 | 2006-05-12 | Apparatus for supplying power source |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100682991B1 (en) |
| CN (1) | CN1866705B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100696563B1 (en) * | 2005-09-16 | 2007-03-20 | 엘지전자 주식회사 | Apparatus for supplying power source |
| CN104750154A (en) * | 2015-03-31 | 2015-07-01 | 宁波双林汽车部件股份有限公司 | Circuit device of reducing energy consumption of sensor |
| JP2017008834A (en) * | 2015-06-23 | 2017-01-12 | 株式会社東芝 | Electric power source for air current generator and wind power generation apparatus |
| CN118016013B (en) * | 2024-04-08 | 2024-06-18 | 芯北电子科技(南京)有限公司 | Display driving chip for liquid crystal display and driving method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2786973B2 (en) * | 1992-07-31 | 1998-08-13 | アルプス電気株式会社 | Power supply circuit |
| CN1541439A (en) * | 2001-10-31 | 2004-10-27 | ƶ��� | dual input Ac and DC power supply having programmable DC output utilizing secondary buck converter |
| CN1591100A (en) * | 2003-08-29 | 2005-03-09 | 罗姆股份有限公司 | Power supply apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100512637B1 (en) * | 2002-07-06 | 2005-09-02 | 매그나칩 반도체 유한회사 | Apparatus for display |
| KR100976983B1 (en) * | 2003-07-31 | 2010-08-19 | 삼성전자주식회사 | Display apparatus |
-
2005
- 2005-05-12 KR KR1020050039599A patent/KR100682991B1/en active IP Right Grant
-
2006
- 2006-05-12 CN CN2006100803941A patent/CN1866705B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2786973B2 (en) * | 1992-07-31 | 1998-08-13 | アルプス電気株式会社 | Power supply circuit |
| CN1541439A (en) * | 2001-10-31 | 2004-10-27 | ƶ��� | dual input Ac and DC power supply having programmable DC output utilizing secondary buck converter |
| CN1591100A (en) * | 2003-08-29 | 2005-03-09 | 罗姆股份有限公司 | Power supply apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1866705A (en) | 2006-11-22 |
| KR20060116957A (en) | 2006-11-16 |
| KR100682991B1 (en) | 2007-02-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1881760B (en) | Apparatus for supplying power source | |
| US7724219B2 (en) | Circuit and method of effectively enhancing drive control of light-emitting diodes | |
| KR100912414B1 (en) | Step-up/step-down dc-dc converter | |
| CN104218803A (en) | Bootstrap voltage charging circuit and voltage conversion circuit | |
| CN101218734A (en) | Step-up/down switching regulator, its control circuit, and electronic apparatus using same | |
| US20060132194A1 (en) | Power MOSFET driver and method therefor | |
| TWI408542B (en) | Apparatus for supplying power source | |
| US8344714B2 (en) | Linear voltage regulator circuit with power saving capability | |
| CN1866705B (en) | Apparatus for supplying power source | |
| TW201121362A (en) | LED driver and driving method | |
| US20080111807A1 (en) | Multi-output switching power supply having voltage limiting circuit | |
| US20130214754A1 (en) | Power supply device | |
| US20080117654A1 (en) | Multi-output switching power supply having voltage limiting circuit | |
| KR100696563B1 (en) | Apparatus for supplying power source | |
| CN216290861U (en) | Drive circuit and electronic device | |
| CN112133238B (en) | Drive circuit and electronic device | |
| US11190105B1 (en) | Single inductor multiple output regulator | |
| CN114301280A (en) | Drive circuit of NMOS switch and electronic equipment | |
| US8604759B2 (en) | Power regulation circuit and electronic device with the same | |
| CN219287374U (en) | Boost circuit and electronic equipment | |
| CN103731030A (en) | Synchronous rectification buck-boost converter | |
| CN109686322B (en) | Switching circuit and backlight driving circuit | |
| US10897151B2 (en) | Method and apparatus for charge recycling | |
| CN202738189U (en) | LED (Light Emitting Diode) driver and DC/DC (Direct Current to Direct Current) boost converter | |
| CN112737565B (en) | Interface circuit and chip |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: LG DISPLAY CO., LTD. Free format text: FORMER OWNER: LG ELECTRONIC CO., LTD. Effective date: 20080627 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20080627 Address after: Seoul, South Kerean Applicant after: LG Display Co., Ltd. Address before: Seoul, South Kerean Applicant before: LG Electronics Inc. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |