CN110989755A - Power supply control circuit and display device - Google Patents
Power supply control circuit and display device Download PDFInfo
- Publication number
- CN110989755A CN110989755A CN201911173914.7A CN201911173914A CN110989755A CN 110989755 A CN110989755 A CN 110989755A CN 201911173914 A CN201911173914 A CN 201911173914A CN 110989755 A CN110989755 A CN 110989755A
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- adder
- control circuit
- gamma
- 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.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The present disclosure provides a power control circuit and a display device, the power control circuit including: the low dropout linear regulator circuit is used for outputting a gamma voltage; one input end of the first adder is connected with the low dropout linear regulator circuit, and the other input end of the first adder inputs a reserved voltage, and the gamma voltage and the reserved voltage are added and integrated to obtain a reference voltage; and the booster circuit is connected with the output end of the first adder and is used for generating stable working voltage with reserved voltage, when the power supply control circuit generates ripples or generates voltage mutation, enough voltage difference is provided to keep the minimum voltage required by the tail end of the chip on film, the problem of overheating caused by overhigh voltage of the chip on film is avoided, and the normal work of the display device with lower power consumption can be ensured.
Description
Technical Field
The invention relates to the technical field of display, in particular to a power supply control circuit and a display device.
Background
At present, the size of the display panel is becoming larger, and the resolution is becoming higher. Under such conditions, it is also a challenge for the temperature of the flip chip and the voltage range accepted.
The larger the size of the display panel is, the longer the X control panel of the display panel is, the X control panel of the display panel is connected with the chip on film, the chip on film is used for bearing the driving integrated circuit chip, and the signal output by the driving integrated circuit chip is transmitted to the display panel through the signal wire on the chip on film. The power supply control circuit is integrated in the driving integrated circuit chip, and the longer the signal wiring for transmitting the working voltage output by the power supply control circuit in the chip on film is along with the increase of the X control board, the larger the resistance and the line loss of the signal wiring are, so that the chip on film at the tail end of the signal wiring for transmitting the working voltage does not have enough voltage, and the display effect of the display panel is influenced; if the working voltage is set to be larger, the voltage of the flip chip on film located in the middle of the signal trace will be higher, resulting in the overheating problem of the flip chip on film and the source driver.
In summary, the conventional display device has the problems of insufficient voltage at the end of the flip chip and heat generation of the flip chip due to unstable working voltage of the flip chip. Therefore, it is desirable to provide a power control circuit and a display device to improve the defect.
Disclosure of Invention
The embodiment of the disclosure provides a power control circuit and a display device, which are used for solving the problems of insufficient voltage at the tail end of a chip on film and heating of the chip on film caused by unstable working voltage of the chip on film of the conventional display device.
The disclosed embodiment provides a power control circuit, including:
the low dropout linear regulator circuit is used for outputting a gamma voltage;
one input end of the first adder is connected with the low dropout linear regulator circuit, and the other input end of the first adder inputs a reserved voltage, and the gamma voltage and the reserved voltage are added and integrated to obtain a reference voltage; and
and the boosting circuit is connected with the output end of the first adder and is used for generating working voltage.
According to an embodiment of the present disclosure, the value of the working voltage is greater than the value of the gamma voltage.
According to an embodiment of the present disclosure, the boost circuit includes:
a current source circuit including a mirror current source and a first resistor; and
and one input end of the second adder is connected with the output end of the first adder, the other input end of the second adder is connected with the current source circuit, and the second adder obtains the working voltage through addition and integration.
According to an embodiment of the present disclosure, the operating voltage is obtained by:
VAA＝VGM1+V1+Ripple/2+R*I；
wherein VAA is the working voltage, VGM1 is the gamma voltage, V1 is the reserved voltage, Ripple is a Ripple voltage generated by the power control circuit, R is a resistance value of the first resistor, and I is a current of the mirror current source.
According to an embodiment of the present disclosure, the voltage boost circuit further includes a first voltage division circuit, a second voltage division circuit, and an error amplifier, one end of the first voltage division circuit is connected to the output end of the second adder, the other end of the first voltage division circuit is connected to the error amplifier, one end of the second voltage division circuit is connected to a feedback voltage, and the other end of the second voltage division circuit is connected to the error amplifier.
According to an embodiment of the disclosure, the value range of the reserved voltage is 100mv to 500 mv.
According to an embodiment of the present disclosure, the LDO circuit includes a programmable gamma chip for generating the gamma voltage according to a voltage provided by an external power supply module.
According to an embodiment of the present disclosure, the gamma voltage ranges from 14V to 16V.
The embodiment of the present disclosure further provides a display device, which includes a liquid crystal display panel, a chip on film circuit and a power control circuit, wherein the chip on film circuit is respectively connected to the liquid crystal display panel and the power control circuit, and is configured to transmit a control signal generated by the power control circuit to the liquid crystal display panel, and the power control circuit includes:
the low dropout linear regulator circuit is used for outputting a gamma voltage;
one input end of the first adder is connected with the low dropout linear regulator circuit, and the other input end of the first adder inputs a reserved voltage, and the gamma voltage and the reserved voltage are added and integrated to obtain a reference voltage; and
and the boosting circuit is connected with the output end of the first adder and is used for generating working voltage.
According to an embodiment of the present disclosure, the boost circuit includes:
the current source circuit comprises a mirror current source and a first resistor; and
and one input end of the second adder is connected with the output end of the first adder, the other input end of the second adder is connected with the current source circuit, and the second adder obtains the working voltage through addition and integration.
The beneficial effects of the disclosed embodiment are as follows: according to the embodiment of the disclosure, the gamma voltage and the reserved voltage generated by the low dropout linear regulator circuit are integrated by the first adder to obtain the reference voltage, and the reference voltage is input to the booster circuit to generate the stable working voltage with the reserved voltage.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some of the disclosed embodiments, and that other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a schematic structural diagram of a power control circuit according to an embodiment of the disclosure;
fig. 2 is a schematic structural diagram of a display device according to a second embodiment of the disclosure.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the disclosure may be practiced. Directional phrases used in this disclosure, such as [ upper ], [ lower ], [ front ], [ back ], [ left ], [ right ], [ inner ], [ outer ], [ side ], etc., refer only to the directions of the attached drawings. Accordingly, the directional terms used are used for the purpose of illustration and understanding of the present disclosure, and are not used to limit the present disclosure. In the drawings, elements having similar structures are denoted by the same reference numerals.
The disclosure is further described with reference to the following drawings and specific embodiments:
the first embodiment is as follows:
the present disclosure provides a power control circuit, which is described in detail below with reference to fig. 1 to 2.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a power control circuit 100 according to an embodiment of the disclosure, where the power control circuit 100 includes a low dropout linear regulator circuit 110, a first adder OP1 and a voltage boost circuit 120, where the low dropout linear regulator 110 is configured to output a gamma voltage VGM1, an input end of the first adder OP1 is connected to the low dropout linear regulator circuit 110, another input end of the first adder OP1 is input with a reserved voltage V1, the first adder OP1 obtains a reference voltage Vref by adding and integrating the gamma voltage VGM1 and the reserved voltage V1, and the voltage boost circuit 120 is connected to an output end of the first adder OP1 and is configured to generate a working voltage VAA.
In this embodiment, the value of the working voltage VAA is greater than the value of the gamma voltage VGM1, so as to ensure that there is enough voltage difference to maintain the normal operation of the power control circuit 100 when the power control circuit 100 is rippled or has sudden voltage change.
In this embodiment, as shown in fig. 1, the boost circuit 120 includes a current source circuit and a second adder OP2, the current source circuit includes a mirror current source I1 and a first resistor R1, an input terminal of the second adder OP2 is connected to an output terminal of the first adder OP1 for receiving the reference voltage Vref, another input terminal of the second adder OP2 is connected to the current source circuit, and the second adder OP2 obtains the operating voltage VAA by adding and integrating.
In this embodiment, the operating voltage VAA is obtained by the following equation:
VAA＝VGM1+V1+Ripple/2+R*I；
wherein VAA is the working voltage, VGM1 is the gamma voltage, V1 is the reserved voltage, Ripple is a Ripple voltage generated by the power control circuit 100, R is a resistance value of the first resistor R1, and I is a current of the mirror current source I1.
In this embodiment, the value range of the reserved voltage V1 is 100mv to 500 mv. Because the VAA is obtained by integrating the reserved voltage of the adder, the gamma voltage, and the voltage of the current Source circuit, the larger the value of the reserved voltage V1 is, the larger the voltage value of the working voltage VAA is, which results in the larger power consumption of the working circuit, thereby causing the problem that the chip on film (flip chip) and the Source Driver (Source Driver) connected to the power management circuit are overheated. Therefore, the value range of the reserved voltage is 100 mv-500 mv. Preferably, the value of the reserved voltage V1 is 100 mv.
In this embodiment, as shown in fig. 1, the low dropout linear regulator circuit 110 includes a programmable gamma chip (not shown in the figure), and the operating voltage VAA is input into the low dropout linear regulator circuit 110, processed by an analog-to-digital conversion module (ADC) inside the programmable gamma chip, generates a Code (Code) to be processed by a digital-to-analog conversion module (DAC) inside the programmable gamma chip, and outputs the gamma voltage VGM 1.
Preferably, the gamma voltage VGM1 is mainly determined by the transmittance of the panel, and therefore, the gamma voltage VGM1 ranges from 14V to 16V.
As shown in fig. 1, in the present embodiment, the voltage boost circuit 120 further includes a first voltage divider circuit 121, a second voltage divider circuit 122, and an error amplifier 123, wherein one end of the first voltage divider circuit 121 is connected to the output end of the second adder OP2, the other end of the first voltage divider circuit 121 is connected to the error amplifier 123, one end of the second voltage divider circuit 122 is connected to the feedback voltage VAA _ FB, the other end of the second voltage divider circuit 122 is connected to the error amplifier 123, and the output end of the error amplifier 123 is connected to the Gate drive Gate of the voltage boost circuit 120. The error amplifier 123 is configured to compare the working voltage VAA divided by the first voltage dividing circuit 121 and the second voltage dividing circuit 122 with the feedback voltage VAA _ FB, amplify a difference signal, generate a corresponding control voltage signal, and output the control voltage signal to the Gate driving Gate.
The embodiment of the disclosure obtains the reference voltage Vref by adding and integrating the gamma voltage VGM1 and the reserved voltage V1 generated by the low dropout linear regulator circuit 110 through the first adder OP1, and inputs the reference voltage Vref to the voltage boost circuit 120 to generate the stable working voltage VAA with the reserved voltage, and when the power control circuit 100 generates ripples or generates voltage sudden changes, there is enough voltage difference to maintain the minimum voltage required by the normal operation of the power control circuit.
Example two:
the present disclosure provides a display device, which is described in detail below with reference to fig. 1 to 2.
As shown in fig. 2, fig. 2 is a schematic structural diagram of a display device 200 according to an embodiment of the disclosure, where the display device 200 includes a liquid crystal display panel 210, a chip on film 220, and a power control circuit 100100, where the chip on film 220 is respectively connected to the liquid crystal display panel 210 and the power control circuit 100, and the power control circuit is configured to generate a control signal and transmit the control signal to the liquid crystal display panel 210 through signal traces of the chip on film 220.
Specifically, the power control circuit 100 is integrated into a driving ic chip (not shown), the driving ic chip is bound and connected to the chip on film 220, and the chip on film 220 is connected to the X control board of the liquid crystal display panel 210.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a power control circuit 100 according to an embodiment of the disclosure, where the power control circuit 100 includes: the low dropout regulator 110, the first adder OP1 and the boost circuit 120 are connected, wherein the low dropout regulator 110 is configured to output a gamma voltage VGM1, an input end of the first adder OP1 is connected to the low dropout regulator 110, a reserved voltage V1 is input to another input end of the first adder OP1, the first adder OP1 obtains a reference voltage Vref by adding and integrating the gamma voltage VGM1 and the reserved voltage V1, and the boost circuit 120 is connected to an output end of the first adder OP1 and configured to generate a working voltage VAA. The working voltage VAA is converted into a VGH voltage signal or a VGL voltage signal in the driving integrated circuit chip through a direct current-direct current converter (DC-DC) for controlling the on and off of a thin film transistor in the liquid crystal display panel 210, and also the working voltage VAA may obtain a gray scale control signal through a voltage dividing circuit for controlling the conversion of pixel gray scales in the liquid crystal display panel 210, and the VGH voltage signal, the VGL voltage signal, and the gray scale control signal are all transmitted to the liquid crystal display panel 210 through a flip chip film 220.
In this embodiment, the value of the working voltage VAA is greater than the value of the gamma voltage VGM1, so as to ensure that there is enough voltage difference to maintain the normal operation of the power control circuit 100 when the power control circuit 100 is rippled or has sudden voltage change.
In this embodiment, as shown in fig. 1, the boost circuit 120 includes a current source circuit and a second adder OP2, the current source circuit includes a mirror current source I1 and a first resistor R1, an input terminal of the second adder OP2 is connected to an output terminal of the first adder OP1 for receiving the reference voltage Vref, another input terminal of the second adder OP2 is connected to the current source circuit, and the second adder OP2 obtains the operating voltage VAA by adding and integrating.
In this embodiment, the operating voltage VAA is obtained by the following equation:
VAA＝VGM1+V1+Ripple/2+R*I；
wherein VAA is the working voltage, VGM1 is the gamma voltage, V1 is the reserved voltage, Ripple is a Ripple voltage generated by the power control circuit 100, R is a resistance value of the first resistor R1, and I is a current of the mirror current source I1.
In this embodiment, the value range of the reserved voltage V1 is 100mv to 500 mv. Since the VAA is obtained by integrating the reserved voltage of the adder, the gamma voltage and the voltage of the current Source circuit, the larger the value of the reserved voltage V1 is, the larger the voltage value of the working voltage VAA is, which results in the larger power consumption of the working circuit, thereby causing the problem that the chip on film 200 and the Source Driver (not shown in the figure) connected to the power management circuit are overheated. Therefore, the value range of the reserved voltage is 100 mv-500 mv. Preferably, the value of the reserved voltage V1 is 100 mv.
In this embodiment, as shown in fig. 1, the low dropout linear regulator circuit 100 includes a programmable gamma chip (not shown in the figure), and the operating voltage VAA is input into the low dropout linear regulator circuit 100, processed by an analog-to-digital conversion module (ADC) inside the programmable gamma chip, generates a Code (Code) to be processed by a digital-to-analog conversion module (DAC) inside the programmable gamma chip, and outputs the gamma voltage VGM 1.
Preferably, the gamma voltage VGM1 is mainly determined by the transmittance of the panel, and therefore, the gamma voltage VGM1 ranges from 14V to 16V.
As shown in fig. 1, in the present embodiment, the voltage boost circuit 120 further includes a first voltage divider circuit 121, a second voltage divider circuit 122, and an error amplifier 123, one end of the first voltage divider circuit 121121 is connected to the output end of the second adder OP2, the other end of the first voltage divider circuit 121 is connected to the error amplifier 123, one end of the second voltage divider circuit 122 is connected to the feedback voltage VAA _ FB, the other end of the second voltage divider circuit 121 is connected to the error amplifier 123, and the output end of the error amplifier 123 is connected to the Gate drive Gate of the voltage boost circuit 120. The error amplifier 123 is configured to compare the working voltage VAA divided by the first voltage dividing circuit 121 and the second voltage dividing circuit 122 with the feedback voltage VAA _ FB, amplify a difference signal, generate a corresponding control voltage signal, and output the control voltage signal to the Gate driving Gate.
In the embodiment of the disclosure, the gamma voltage VGM1 and the reserved voltage V1 generated by the low dropout linear regulator circuit 100 are added and integrated by the first adder OP1 to obtain the reference voltage Vref, and the reference voltage Vref is input to the boost circuit 100 to generate the working voltage VAA, when the power control circuit 100 generates ripples or voltage sudden change, sufficient voltage difference is provided to maintain the minimum voltage required by the normal operation of the end of the flip chip film 220, and meanwhile, the problem of overheating caused by the overhigh voltage of the flip chip film 220 is not caused, and the display device 200 can be ensured to normally operate with lower power consumption.
In summary, although the present disclosure has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present disclosure, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, so that the scope of the present disclosure is defined by the appended claims.
Claims (10)
1. A power control circuit, comprising:
the low dropout linear regulator circuit is used for outputting a gamma voltage;
one input end of the first adder is connected with the low dropout linear regulator circuit, and the other input end of the first adder inputs a reserved voltage, and the gamma voltage and the reserved voltage are added and integrated to obtain a reference voltage; and
and the boosting circuit is connected with the output end of the first adder and is used for generating working voltage.
2. The power supply control circuit of claim 1, wherein the operating voltage has a value greater than a value of the gamma voltage.
3. The power supply control circuit of claim 1, wherein the boost circuit comprises:
a current source circuit including a mirror current source and a first resistor;
and one input end of the second adder is connected with the output end of the first adder, the other input end of the second adder is connected with the current source circuit, and the second adder obtains the working voltage through addition and integration.
4. The power control circuit of claim 3, wherein the operating voltage is obtained by:
VAA＝VGM1+V1+Ripple/2+R*I；
wherein VAA is the working voltage, VGM1 is the gamma voltage, V1 is the reserved voltage, Ripple is a Ripple voltage generated by the power control circuit, R is a resistance value of the first resistor, and I is a current of the mirror current source.
5. The power supply control circuit according to claim 3, wherein the voltage boost circuit further includes a first voltage division circuit, a second voltage division circuit, and an error amplifier, one end of the first voltage division circuit is connected to the output terminal of the second adder, the other end of the first voltage division circuit is connected to the error amplifier, one end of the second voltage division circuit is connected to a feedback voltage, and the other end of the second voltage division circuit is connected to the error amplifier.
6. The power control circuit of claim 1, wherein the reserve voltage has a value in a range of 100mv to 500 mv.
7. The power control circuit of claim 1, wherein the LDO circuit comprises a programmable gamma chip for generating the gamma voltage according to a voltage provided by an external power supply module.
8. The power control circuit of claim 1, wherein the gamma voltage ranges from 14V to 16V.
9. A display device is characterized by comprising a liquid crystal display panel, a chip on film and a power supply control circuit, wherein the chip on film is respectively connected with the liquid crystal display panel and the power supply control circuit and is used for transmitting a control signal generated by the power supply control circuit to the liquid crystal display panel, and the power supply control circuit comprises:
the low dropout linear regulator circuit is used for outputting a gamma voltage;
one input end of the first adder is connected with the low dropout linear regulator circuit, and the other input end of the first adder inputs a reserved voltage, and the gamma voltage and the reserved voltage are added and integrated to obtain a reference voltage; and
and the boosting circuit is connected with the output end of the first adder and is used for generating the working voltage.
10. The display device according to claim 9, wherein the boosting circuit comprises:
the current source circuit comprises a mirror current source and a first resistor;
and one input end of the second adder is connected with the output end of the first adder, the other input end of the second adder is connected with the current source circuit, and the second adder obtains the working voltage through addition and integration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911173914.7A CN110989755B (en) | 2019-11-26 | 2019-11-26 | Power supply control circuit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911173914.7A CN110989755B (en) | 2019-11-26 | 2019-11-26 | Power supply control circuit and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110989755A true CN110989755A (en) | 2020-04-10 |
| CN110989755B CN110989755B (en) | 2021-08-24 |
Family
ID=70087125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911173914.7A Active CN110989755B (en) | 2019-11-26 | 2019-11-26 | Power supply control circuit and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110989755B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113012611A (en) * | 2021-02-26 | 2021-06-22 | 深圳市华星光电半导体显示技术有限公司 | Voltage detection circuit, display device and display driving method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101510406A (en) * | 2009-03-17 | 2009-08-19 | 上海广电光电子有限公司 | Drive method for main voltage of liquid crystal display |
| US8018176B1 (en) * | 2007-06-28 | 2011-09-13 | National Semiconductor Corporation | Selectable power FET control for display power converter |
| CN107256698A (en) * | 2013-12-06 | 2017-10-17 | 矽创电子股份有限公司 | The drive circuit and its drive module of display panel and display device and manufacture method |
| CN207833373U (en) * | 2018-03-06 | 2018-09-07 | 北京京东方显示技术有限公司 | The generative circuit and display device of a kind of voltage generation circuit, gamma reference voltage |
| CN108809086A (en) * | 2018-06-29 | 2018-11-13 | 深圳市华星光电半导体显示技术有限公司 | Voltage generation circuit |
-
2019
- 2019-11-26 CN CN201911173914.7A patent/CN110989755B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8018176B1 (en) * | 2007-06-28 | 2011-09-13 | National Semiconductor Corporation | Selectable power FET control for display power converter |
| CN101510406A (en) * | 2009-03-17 | 2009-08-19 | 上海广电光电子有限公司 | Drive method for main voltage of liquid crystal display |
| CN107256698A (en) * | 2013-12-06 | 2017-10-17 | 矽创电子股份有限公司 | The drive circuit and its drive module of display panel and display device and manufacture method |
| CN207833373U (en) * | 2018-03-06 | 2018-09-07 | 北京京东方显示技术有限公司 | The generative circuit and display device of a kind of voltage generation circuit, gamma reference voltage |
| CN108809086A (en) * | 2018-06-29 | 2018-11-13 | 深圳市华星光电半导体显示技术有限公司 | Voltage generation circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113012611A (en) * | 2021-02-26 | 2021-06-22 | 深圳市华星光电半导体显示技术有限公司 | Voltage detection circuit, display device and display driving method thereof |
| CN113012611B (en) * | 2021-02-26 | 2022-10-04 | 深圳市华星光电半导体显示技术有限公司 | Voltage detection circuit, display device and display driving method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110989755B (en) | 2021-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9072143B2 (en) | Liquid crystal display device | |
| US7274251B2 (en) | Apparatus and method of current sharing | |
| US20060261790A1 (en) | Direct current voltage boosting/bucking device | |
| US8686701B2 (en) | Active wire compensation circuit and controller with the same | |
| TW200921597A (en) | Display device and driving voltage compensation device for backlight module | |
| US20210343225A1 (en) | Display panel | |
| US8633708B2 (en) | Current calibration method and associated circuit | |
| US7405545B2 (en) | Voltage-regulator and power supply having current sharing circuit | |
| US20190302821A1 (en) | Semiconductor apparatus for power supply control and output voltage variable power supply apparatus | |
| US10680504B2 (en) | Bandgap reference circuit and DCDC converter having the same | |
| KR20110084677A (en) | Power source circuit and liquid crystal display having the same | |
| TWI595468B (en) | Oled panel and associated power driving system | |
| CN110989755B (en) | Power supply control circuit and display device | |
| JP2008309834A (en) | Semiconductor integrated circuit, power source system interface and electronic equipment | |
| CN109256104B (en) | Display device, display panel power supply system and circuit thereof | |
| JP5837110B2 (en) | Display panel driving circuit and driving module thereof, display device and manufacturing method thereof | |
| KR20000012003A (en) | Power supply circuit for liquid crystal display | |
| CN110007707A (en) | Low pressure difference linear voltage regulator and system | |
| EP2624248A1 (en) | Gradation voltage generating circuit and liquid crystal display device | |
| CN106910476B (en) | Backlight driving circuit, driving method, backlight system and display device | |
| CN210325164U (en) | Logic voltage compensation circuit and display module driving system | |
| US9448572B2 (en) | Voltage adjusting circuit and all-in-one computer including the same | |
| US10097087B2 (en) | Power conversion including sensing a load current and adapting output voltage based on the load current | |
| CN114207698B (en) | Power management device and display device | |
| JP4650947B2 (en) | Electronic device, control method thereof, and optical semiconductor module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |