CN106531059B - Display screen driving circuit and electronic equipment - Google Patents
Display screen driving circuit and electronic equipment Download PDFInfo
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- CN106531059B CN106531059B CN201610921738.0A CN201610921738A CN106531059B CN 106531059 B CN106531059 B CN 106531059B CN 201610921738 A CN201610921738 A CN 201610921738A CN 106531059 B CN106531059 B CN 106531059B
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- 238000001914 filtration Methods 0.000 claims abstract description 27
- 239000003990 capacitor Substances 0.000 claims description 33
- 238000007599 discharging Methods 0.000 claims description 10
- 238000004146 energy storage Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000007488 abnormal function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Classifications
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- 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]
Abstract
The invention discloses a display screen driving circuit and an electronic device, wherein the circuit comprises: an input branch, a boost branch and an output branch; the input branch circuit is used for receiving an input power supply signal, filtering interference of the input power supply signal and transmitting the interference to the boost branch circuit; the boost branch is used for receiving a boost adjusting signal sent by the main board, a partial pressure feedback signal of the output branch and an input power supply signal of the input branch; boosting the input power supply signal according to the boosting regulation signal and the partial pressure feedback signal of the output branch; and the output branch circuit is used for filtering the input power supply signal after the boosting treatment and outputting the signal, dividing the filtered output signal and feeding the divided output signal back to the boosting branch circuit. According to the technical scheme, the output voltage can be regulated according to the boost regulating signal sent by the main board, so that the actual requirements of users are met, and the user experience is improved.
Description
Technical Field
The invention relates to the technical field of driving circuits, in particular to a display screen driving circuit and electronic equipment.
Background
At present, an OLED (Organic Light Emitting Display, organic light emitting diode display) display screen is widely applied to intelligent wearable equipment with particularly high power consumption requirements due to the advantages of low power consumption, high contrast, flexibility and the like. The OLED display screen is composed of an organic light emitting diode array, the brightness of the OLED display screen is in a proportional relation with the driving voltage, and the higher the driving voltage is, the higher the screen brightness is, but the larger the power consumption is. In practical application, the stronger the ambient light is, the larger the screen brightness is, otherwise, the user can not see the content of the screen clearly; accordingly, if the ambient light is weak, the screen brightness is lower to reduce power consumption and prevent user glare. In the prior art, the OLED screen driving voltage is generally high, and can reach 16V. For a device powered by a battery, if the OLED screen is used for display, a boost circuit is required to drive the OLED screen.
However, in the design process of the driving circuit for implementing the OLED screen, the inventor has found that at least the following problems exist in the prior art:
the output voltage of a booster circuit in a driving circuit of the OLED screen is usually a fixed value, and cannot be flexibly adjusted according to the requirement of an actual circuit.
Disclosure of Invention
The invention provides a display screen driving circuit and electronic equipment, and aims to solve the problem that the output voltage of a boost circuit in the driving circuit of an OLED screen is usually a fixed value and cannot be flexibly adjusted according to the requirement of an actual circuit.
According to an aspect of the present invention, there is provided a display screen driving circuit, the circuit comprising: an input branch, a boost branch and an output branch;
the input branch circuit is used for receiving an input power supply signal, filtering interference of the input power supply signal and transmitting the interference to the boost branch circuit;
the boost branch is used for receiving a boost adjusting signal sent by the main board, a partial pressure feedback signal of the output branch and an input power supply signal of the input branch; boosting the input power supply signal according to the boosting regulation signal and the partial pressure feedback signal of the output branch;
and the output branch circuit is used for filtering the input power supply signal after the boosting treatment and outputting the signal, dividing the filtered output signal and feeding the divided output signal back to the boosting branch circuit.
According to still another aspect of the present invention, there is provided an electronic device including: a display screen driving circuit according to another aspect of the present invention.
The beneficial effects of the invention are as follows: according to the display screen driving circuit and the electronic equipment, the boosting branch is used for boosting the input power supply signal according to the boosting regulation signal sent by the main board and the partial pressure feedback signal of the output branch. Firstly, the display screen driving circuit can realize flexible adjustment of output voltage by adjusting the boost adjusting signal sent by the main board and the voltage division feedback signal of the output branch, thereby meeting the requirements of different output voltages. And secondly, the display screen driving circuit also carries out interference filtering on the input power supply signal through the input branch circuit, so that the input signal interference in the boost branch circuit is reduced. In addition, the display screen driving circuit also carries out filtering processing on the output signals through the output branches, so that the interference of the output signals is reduced, the accuracy of feedback signals after voltage division processing is improved, and the output accuracy of the display screen driving circuit is improved.
Drawings
FIG. 1 is a block diagram of a display screen driving circuit according to one embodiment of the present invention;
FIG. 2 is a block diagram of a display driving circuit according to another embodiment of the present invention;
FIG. 3 is a circuit diagram of a display screen driving circuit according to one embodiment of the present invention;
fig. 4 is a block diagram of an electronic device according to an embodiment of the invention.
Detailed Description
The driving circuit of the existing OLED screen needs to drive the OLED screen through a booster circuit, and the output voltage of the booster circuit in the prior art is usually a fixed value. The current driving circuit of the OLED screen can only drive the OLED screen by a fixed value voltage output by the voltage boosting circuit.
The design concept of the invention is as follows: aiming at the problem that the output voltage of a boost circuit in the existing drive circuit of the OLED screen is usually a fixed value and cannot be flexibly adjusted according to the requirements of an actual circuit, the boost branch circuit can realize flexible adjustment of the output voltage through adjusting the boost adjusting signal sent by the main board and the voltage division feedback signal of the output branch circuit, so that the requirements of different output voltages can be met.
Example 1
Fig. 1 is a block diagram of a display driving circuit according to an embodiment of the present invention, and referring to fig. 1, the display driving circuit includes: an input branch 11, a boost branch 12 and an output branch 13;
the input branch 11 is configured to receive an input power signal, filter interference of the input power signal, and transmit the filtered interference to the boost branch 12;
the boost branch 12 is configured to receive a boost adjustment signal sent by the motherboard, a voltage division feedback signal of the output branch, and an input power signal of the input branch 11; boosting the input power supply signal according to the boosting regulation signal and the partial pressure feedback signal of the output branch 13;
the output branch 13 is configured to output the boosted input power signal after filtering, and to divide the filtered output signal and feed the divided output signal back to the boost branch 12.
The beneficial effects of the invention are as follows: according to the display screen driving circuit, the boosting branch is used for boosting the input power supply signal according to the boosting regulation signal sent by the main board and the partial pressure feedback signal of the output branch. Firstly, the display screen driving circuit can realize flexible adjustment of output voltage by adjusting the boost adjusting signal sent by the main board and the voltage division feedback signal of the output branch, thereby meeting the requirements of different output voltages. And secondly, the display screen driving circuit also carries out interference filtering on the input power supply signal through the input branch circuit, so that the input signal interference in the boost branch circuit is reduced. In addition, the display screen driving circuit also carries out filtering processing on the output signals through the output branches, so that the interference of the output signals is reduced, the accuracy of feedback signals after voltage division processing is improved, and the output accuracy of the display screen driving circuit is improved.
Example two
Based on the first embodiment, fig. 2 is a block diagram showing a specific implementation structure of a display screen driving circuit according to another embodiment of the present invention, referring to fig. 2, the display screen driving circuit includes: an input branch 11, a boost branch 12, an output branch 13 and a discharge branch 14;
the functions of the input branch 11, the boost branch 12 and the output branch 13 are the same as those of the first embodiment, and will not be described again here.
The discharging branch 14 is configured to receive a control signal sent by the motherboard; and releasing the output charge after the filtering processing according to the control signal.
The output branch 13 includes: the device comprises a filtering unit and a feedback unit; the filtering unit is used for filtering the boosted input power supply signal to filter interference signals in the output signal; the feedback unit is used for carrying out partial pressure processing on the output signal after the filtering processing and feeding back the partial pressure signal to the boost branch.
The beneficial effects of the invention are as follows: the display screen driving circuit is further provided with the discharging branch, and charges accumulated on the output voltage end can be rapidly released through the discharging branch when the boosting chip stops outputting voltage, so that time sequence errors caused by long power-down time of the screen driving voltage can be avoided, and system function abnormality or damage can be avoided.
Example III
Based on the above second embodiment, fig. 3 is a circuit diagram of a specific implementation of a display screen driving circuit according to an embodiment of the present invention, and referring to fig. 3, the display screen driving circuit includes: an input branch 11, a boost branch 12, an output branch 13 and a discharge branch 14;
wherein the input branch 11 comprises: a filter capacitor C1 is input;
one end of the input filter capacitor C1 is connected with the connection end of the input power supply and the boost branch, and the other end of the input filter capacitor C is connected with the ground;
the feedback unit includes: a first voltage dividing resistor R1 and a second voltage dividing resistor R2; the filtering unit includes: an output filter capacitor C3;
the first voltage dividing resistor R1 and the second voltage dividing resistor R2 are connected in series, and the series connection of the first voltage dividing resistor R1 and the second voltage dividing resistor R2 is connected with the feedback end of the boosting branch; the other end of the first voltage dividing resistor R1 is connected with the output end of the output branch; the other end of the second voltage dividing resistor R2 is grounded;
one end of the output filter capacitor C3 is connected with the output end of the output branch circuit, and the other end of the output filter capacitor C is grounded.
The output branch 13 further comprises: a feedforward capacitor C4;
one end of the feedforward capacitor C4 is connected with the output end of the output branch, and the other end of the feedforward capacitor C is connected with the serial connection end of the first voltage dividing resistor R1 and the second voltage dividing resistor R2.
The boost branch circuit includes: the device comprises a boost chip U1, an energy storage inductor L1, a bootstrap capacitor C2 and a frequency setting resistor R4;
the connection end of the input end and the enabling end of the boost chip U1 is connected with one end of the energy storage inductor L1; the other end of the energy storage inductor L1 is connected with the connection end of the pin SW of the boost chip U1 and the bootstrap capacitor C2; the other end of the bootstrap capacitor C2 is connected with a bootstrap pin of the boost chip U1; the pin FB of the boost chip U1 is connected with the serial connection end of the first voltage dividing resistor R1 and the second voltage dividing resistor R2; the pin SCL and the pin SDA of the boosting chip U1 are connected with the main board;
one end of the frequency setting resistor R4 is connected with the switching frequency setting pin of the boost chip U1, and the other end of the frequency setting resistor R is grounded.
The discharge branch 14 comprises: a first switching tube Q1 and a current limiting resistor R3;
one end of the current limiting resistor R3 is connected with the output end of the output branch, and the other end of the current limiting resistor R3 is connected with the drain electrode of the first switching tube Q1.
The source electrode of the first switching tube Q1 is grounded, and the grid electrode of the first switching tube Q1 is connected with the main board.
Note that, the boost chip may be of a chip type MP3309C.
Based on the above embodiments, the principle of the technical scheme of the present invention is described in detail below by specific examples; let the boost chip be MP3309C. According to the display screen driving circuit, the flexible adjustment of the output voltage can be realized by adjusting the boost adjusting signal sent by the main board and the partial pressure feedback signal of the output branch, and the highest output voltage can reach 36V, so that the requirements of automatically adjusting the screen brightness in different use environments are met. In addition, the technical scheme of the invention also adds a discharge branch, so that the abnormal or damaged function caused by the time sequence error due to long power-down time of the screen driving voltage can be avoided.
As shown in fig. 3, the circuit includes a boost chip MP3309C, an input filter capacitor C1, an energy storage inductor L1, a bootstrap capacitor C2, a switching frequency setting resistor R4, feedback resistors R1 and R2, a feedforward capacitor C4, an output filter capacitor C3, a first switching tube Q1, and a discharge resistor R3. The first switching tube Q1 may be a discharge NMOS tube.
The main function of the boost chip MP3309C is to boost the boost value of the input power supply voltage to a set voltage; the VIN pin of the boost chip MP3309C, namely pin 2 is a voltage input pin; the SDA pin, namely the pin 1 is an I2C protocol data input/output pin, the SCL pin, namely the pin 10 is an I2C protocol clock input pin, the output voltage can be set by modifying the internal register of the MP3309C through the pins SDA/SCL, namely the boost regulating signal sent by the main board is sent to the pins SDA/SCL, so that the output voltage of the MP3309C can be set; the EN/PWM pin, pin 3, is used to enable the chip; the RFEQ pin, namely pin 4, is mainly used for setting the MP3309C chip switching frequency; GND pin, namely pin 6 is the power ground pin of the chip; SW is the drain electrode of a low-side MOSFET (low-voltage side MOS switch tube) in the chip, a BST pin, namely a pin 9 is a bootstrap pin, and a capacitor is added between the SW and the BST pin and used for driving the MOS switch tube in the chip; the VOUT pin, pin 8, is used to output voltage; the FB pin is an output voltage feedback pin, and is mainly used for the MP3309C to obtain the output voltage. The filter capacitor C1 is configured to filter interference in an input power signal. The bootstrap capacitor C2 is used for driving a switching tube MOSFET inside the chip. The filter capacitor C3 is used for filtering interference on the output power supply. The feedforward capacitor C4 is used for improving the dynamic response speed of the chip. The energy storage inductor L1 is used for storing electric energy and is an essential component of the boost branch. The frequency setting resistor R4 is used for setting the switching frequency of the MP3309C chip. After the voltage dividing resistors R1 and R2 divide the output voltage VOUT, the voltage is fed back to the FB pin of the MP3309C chip, and the MP3309C chip obtains the difference between the output voltage VOUT and a set value, so as to adjust the output voltage.
The switching tube Q1 and the current limiting resistor R3 form a discharge circuit; the switching tube Q1 is an N-channel switching tube MOSFET; the N-channel switching tube MOSFET can be replaced by a PNP triode to be used as a switch of a discharging passage; the current limiting resistor R3 is used for limiting current and preventing overlarge current during discharging; when the electric charge accumulated on the output voltage VOUT needs to be released, the main board sets the transmission signal CONTROL pin CONTROL to a high level, so that the electric charge accumulated on the output voltage VOUT can be released rapidly.
For example: according to the technical scheme, through the I2C interface of the booster chip MP3309C, namely the SDA pin and the SCL pin, the FB pin voltage VFB can be set between 0 and 200mV, and then the output voltage VOUT is as follows:
VOUT＝VFB*(R1+R2)/R2
setting: vfb=200 mV
R1＝800K
R2＝10K
The output voltage vout=16.2v
In addition to the screen driving power supply, the OLED screen usually has a digital circuit power supply, and in order to avoid damage or abnormal functions, when the screen display is turned off, the screen driving power supply must be reduced to 0 first, and then the digital circuit power supply is turned off. In order to meet the time sequence requirement, the invention increases the discharging branch of the output voltage VOUT composed of the switching tube Q1 and the current limiting resistor R3 to avoid slow voltage drop caused by the lack of a discharging path of the output voltage VOUT. Normally, the main board sets the pin CONTROL to be low level, the switching tube Q1 is not conducted, and the output voltage VOUT is normally output. When the output voltage VOUT needs to be turned off, the input voltage VIN of the MP3309C is first turned off, then the pin CONTROL is set to high level, and the switching tube Q1 is turned on, so that the output voltage VOUT can be rapidly pulled down to 0V.
Example IV
Fig. 4 is a block diagram of an electronic device according to an embodiment of the present invention, and referring to fig. 4, the electronic device 40 includes: a display screen driving circuit 41. The implementation principle and operation of the display driving circuit 41 can be referred to in the first to third embodiments, and the detailed description of the display driving circuit is omitted here.
The beneficial effects of the invention are as follows: according to the display screen driving circuit and the electronic equipment, the boosting branch is used for boosting the input power supply signal according to the boosting regulation signal sent by the main board and the partial pressure feedback signal of the output branch. Firstly, the display screen driving circuit can realize flexible adjustment of output voltage by adjusting the boost adjusting signal sent by the main board and the voltage division feedback signal of the output branch, thereby meeting the requirements of different output voltages. And secondly, the display screen driving circuit also carries out interference filtering on the input power supply signal through the input branch circuit, so that the input signal interference in the boost branch circuit is reduced. In addition, the display screen driving circuit also carries out filtering processing on the output signals through the output branches, so that the interference of the output signals is reduced, the accuracy of feedback signals after voltage division processing is improved, and the output accuracy of the display screen driving circuit is improved. In addition, a discharging branch is further added in the technical scheme, and when the boosting chip stops outputting voltage, the discharging branch can rapidly release charges accumulated on the output voltage end, so that time sequence errors caused by long power-down time of screen driving voltage can be avoided, and system function abnormality or damage can be avoided.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (7)
1. A display screen driving circuit, the circuit comprising: an input branch, a boost branch and an output branch;
the input branch circuit is used for receiving an input power supply signal, filtering interference of the input power supply signal and transmitting the interference to the boost branch circuit;
the boost branch is used for receiving a boost adjusting signal sent by the main board, a partial pressure feedback signal of the output branch and an input power supply signal of the input branch; boosting the input power supply signal according to the boosting regulation signal and the partial pressure feedback signal of the output branch;
the output branch is used for filtering the input power supply signal after the boosting treatment and outputting the output power supply signal, dividing the output signal after the filtering treatment and feeding the output signal back to the boosting branch; the output branch includes: the device comprises a filtering unit and a feedback unit; the filtering unit is used for filtering the boosted input power supply signal to filter interference signals in the output signal; the feedback unit is used for carrying out partial pressure processing on the output signal after the filtering processing and feeding back the partial pressure signal to the boost branch; the feedback unit includes: a first voltage dividing resistor R1 and a second voltage dividing resistor R2; the first voltage dividing resistor R1 and the second voltage dividing resistor R2 are connected in series, and the series connection of the first voltage dividing resistor R1 and the second voltage dividing resistor R2 is connected with the feedback end of the boosting branch; the other end of the first voltage dividing resistor R1 is connected with the output end of the output branch; the other end of the second voltage dividing resistor R2 is grounded;
the boost branch circuit includes: boost chip U1, energy storage inductance L1;
the connection end of the input end and the enabling end of the boost chip U1 is connected with one end of the energy storage inductor L1; the other end of the energy storage inductor L1 is connected with a pin SW of the boost chip U1; the pin FB of the boost chip U1 is connected with the serial connection end of the first voltage dividing resistor R1 and the second voltage dividing resistor R2; the pin SCL and the pin SDA of the boosting chip U1 are connected with the main board;
the circuit further includes: a discharge branch;
the discharging branch is used for receiving the control signal sent by the main board; releasing the output charge after the filtering treatment according to the control signal; the discharge branch includes: a first switching tube Q1 and a current limiting resistor R3; one end of the current limiting resistor R3 is connected with the output end of the output branch, and the other end of the current limiting resistor R3 is connected with the drain electrode of the first switching tube Q1; the source electrode of the first switching tube Q1 is grounded, and the grid electrode of the first switching tube Q1 is connected with the main board.
2. The circuit of claim 1, wherein the input branch comprises: a filter capacitor C1 is input;
one end of the input filter capacitor C1 is connected with the connection end of the input power supply and the boost branch, and the other end of the input filter capacitor C1 is connected with the ground.
3. The circuit of claim 2, wherein the filtering unit comprises: an output filter capacitor C3;
one end of the output filter capacitor C3 is connected with the output end of the output branch circuit, and the other end of the output filter capacitor C is grounded.
4. A circuit according to claim 3, wherein the output branch further comprises: a feedforward capacitor C4;
one end of the feedforward capacitor C4 is connected with the output end of the output branch, and the other end of the feedforward capacitor C is connected with the serial connection end of the first voltage dividing resistor R1 and the second voltage dividing resistor R2.
5. The circuit of claim 4, wherein the boost branch further comprises: a bootstrap capacitor C2 and a frequency setting resistor R4;
the pin SW of the boost chip U1 is connected with one end of the bootstrap capacitor C2, and the other end of the bootstrap capacitor C2 is connected with the bootstrap pin of the boost chip U1; one end of the frequency setting resistor R4 is connected with the switching frequency setting pin of the boost chip U1, and the other end of the frequency setting resistor R is grounded.
6. The circuit of claim 5, wherein the boost chip is model MP3309C.
7. An electronic device, comprising: a display screen driving circuit as claimed in any one of claims 1 to 6.
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| CN201610921738.0A CN106531059B (en) | 2016-10-21 | 2016-10-21 | Display screen driving circuit and electronic equipment |
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| CN201610921738.0A CN106531059B (en) | 2016-10-21 | 2016-10-21 | Display screen driving circuit and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107680539A (en) * | 2017-09-30 | 2018-02-09 | 深圳市艾特智能科技有限公司 | The anti-lightning road of backlight |
| CN108831375B (en) * | 2018-07-26 | 2020-06-05 | 京东方科技集团股份有限公司 | Pixel circuit, driving method thereof and display device |
| CN109343636A (en) * | 2018-11-19 | 2019-02-15 | 威创集团股份有限公司 | Dual output circuit and chip |
| CN111554235A (en) * | 2020-05-28 | 2020-08-18 | 广东美的厨房电器制造有限公司 | Boost circuit, display device and household appliance |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001028194A (en) * | 1999-07-14 | 2001-01-30 | Matsushita Electric Ind Co Ltd | Internal power circuit and non-volatile semiconductor memory device |
| KR20010073251A (en) * | 2000-01-13 | 2001-08-01 | 윤종용 | A circuit for autometically controlling a high-voltage in a video display system |
| CN102761250A (en) * | 2012-04-28 | 2012-10-31 | 中国矿业大学(北京) | Medium-and-high-frequency voltage conversion device for geologic radar |
| CN102842292A (en) * | 2011-06-24 | 2012-12-26 | 鸿富锦精密工业（深圳）有限公司 | Power supply management circuit and display device using same |
| CN105450207A (en) * | 2015-11-19 | 2016-03-30 | 中国航天时代电子公司 | Bootstrap driving circuit |
| CN206236402U (en) * | 2016-10-21 | 2017-06-09 | 歌尔科技有限公司 | A kind of display drive circuit and electronic equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI279970B (en) * | 2005-07-20 | 2007-04-21 | Delta Electronics Inc | Configuration and controlling method of boost circuit having pulse-width modulation limiting controller |
-
2016
- 2016-10-21 CN CN201610921738.0A patent/CN106531059B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001028194A (en) * | 1999-07-14 | 2001-01-30 | Matsushita Electric Ind Co Ltd | Internal power circuit and non-volatile semiconductor memory device |
| KR20010073251A (en) * | 2000-01-13 | 2001-08-01 | 윤종용 | A circuit for autometically controlling a high-voltage in a video display system |
| CN102842292A (en) * | 2011-06-24 | 2012-12-26 | 鸿富锦精密工业（深圳）有限公司 | Power supply management circuit and display device using same |
| CN102761250A (en) * | 2012-04-28 | 2012-10-31 | 中国矿业大学(北京) | Medium-and-high-frequency voltage conversion device for geologic radar |
| CN105450207A (en) * | 2015-11-19 | 2016-03-30 | 中国航天时代电子公司 | Bootstrap driving circuit |
| CN206236402U (en) * | 2016-10-21 | 2017-06-09 | 歌尔科技有限公司 | A kind of display drive circuit and electronic equipment |
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