CN207663771U - Circuit occurs for common voltage - Google Patents
Circuit occurs for common voltage Download PDFInfo
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- CN207663771U CN207663771U CN201721101502.9U CN201721101502U CN207663771U CN 207663771 U CN207663771 U CN 207663771U CN 201721101502 U CN201721101502 U CN 201721101502U CN 207663771 U CN207663771 U CN 207663771U
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- circuit occurs
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- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
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Abstract
A kind of common voltage generation circuit is disclosed, including：Master controller, for providing control signal；Digital analog converter is connected with master controller, for generating analog voltage according to control signal；Circuit occurs for the first common voltage, is connected with digital analog converter, for analog voltage to be converted into identical first common voltage of amplitude；Circuit occurs for the second common voltage, is connected with digital analog converter, for analog voltage to be converted into identical second common voltage of amplitude；Wherein, the first common voltage is to exchange common voltage, and amplitude is identical, opposite in phase with the second common voltage.Circuit occurs for common voltage provided by the utility model, common voltage is generated by main controller controls digital analog converter, and generate identical amplitude, the first common voltage of opposite in phase and the second common voltage, then it is amplified and loads DC component treatment, reach the voltage volt value needed for liquid crystal deflection, to meet the needs of HVA display devices are to common voltage.
Description
Technical field
The utility model is related to display technology fields, and circuit occurs more particularly, to a kind of common voltage.
Background technology
Liquid crystal display (Liquid Crystal Display, LCD) has many advantages, such as frivolous, energy saving, radiationless,
Therefore traditional cathode-ray tube (CRT) display has been gradually replaced.Liquid crystal display is widely used in high definition at present
The electronics such as clear DTV, desktop computer, personal digital assistant (PDA), laptop, mobile phone, digital camera are set
In standby.
Currently, wide viewing angle belongs to the mainstream development direction of liquid crystal display.For example, using laptop, individual digital
The portable electronic device etc. of the wide viewing angles such as assistant, tablet computer, mobile phone is all made of wide viewing angle technology so that people from
Complete and distortionless picture is can see when the display of different direction viewing wide viewing angles.But it is personal hidden when being related to
When private and important information, the use of the display of wide viewing angle in some cases can also make people feel inconvenient, for example, in vehicle
Stand etc. vehicles when, the people at beside user and rear very likely gets a glimpse of the screen of the portable electronic device of the wide viewing angle of user
Content on curtain.
Therefore, other than the demand of wide viewing angle, under the occasion for needing peep-proof, display can be switched or be adjusted
Display to narrow viewing angle pattern also has gradually developed.The display has mixing visual angle (Hybird Viewing
Angle), may be implemented between wide viewing angle (Wide Viewing Angle) and narrow viewing angle (Narrow Viewing Angle)
Switching.
As shown in Figure 1, it includes master controller 11, digital analog converter 12 and amplification electricity that circuit, which occurs, for existing common voltage
Road 13, wherein master controller 11 provides clock signal and voltage signal to digital analog converter 12, and digital analog converter 12 is according to sequential
Voltage signal is converted into an analog voltage signal by signal, which is amplified and provide one directly by amplifying circuit 13
Flow component generates the common voltage needed for liquid crystal display device.
Liquid crystal display device common voltage required under wide viewing angle pattern and common voltage required under narrow viewing angle pattern
It is different.Circuit, which occurs, for existing common voltage can only export a kind of common voltage, cannot meet the requirement of liquid crystal display device.
Invention content
In view of the above problems, the purpose of this utility model is to provide a kind of common voltages, and circuit occurs, and can give display
Device provides the first common voltage and the second common voltage that reverse phase synchronizes.
It is according to the present utility model in a first aspect, providing a kind of common voltage occurs circuit, including：Master controller is used for
Control signal is provided；Digital analog converter is connected with the master controller, for generating analog voltage according to the control signal；
Circuit occurs for the first common voltage, is connected with the digital analog converter, for the analog voltage to be converted into the first common electrical
Pressure；Circuit occurs for the second common voltage, is connected with the digital analog converter, public for the analog voltage to be converted into second
Voltage；Wherein, first common voltage is to exchange common voltage, and amplitude is identical, phase phase with second common voltage
Instead.
Preferably, the master controller is connected with the digital analog converter via I2C buses.
Preferably, the control signal includes clock signal and voltage signal.
Preferably, it includes inverter circuit that circuit, which occurs, for first common voltage, for generating and the analog voltage
First common voltage of opposite in phase.
Preferably, the inverter circuit includes the first operational amplifier, first resistor and the first feedback resistance；Wherein,
First operational amplifier includes normal phase input end, inverting input and output end, positive input end grounding, inverting input warp
It is connected with digital analog converter by first resistor, the first feedback resistance is connected between inverting input and output end.
Preferably, it includes follower circuit that circuit, which occurs, for second common voltage, for generating and the analog voltage
Identical second common voltage of phase.
Preferably, the follower circuit includes second operational amplifier, second resistance and the second feedback resistance；Wherein,
Second operational amplifier includes normal phase input end, inverting input and output end, and normal phase input end is via second resistance and number
Mode converter is connected；Second feedback resistance is connected between inverting input and output end.
Preferably, it further includes the first amplifying circuit that circuit, which occurs, for first common voltage, for public by described first
Voltage amplification and to amplified first common voltage provide DC voltage component.
Preferably, it further includes the second amplifying circuit that circuit, which occurs, for second common voltage, for public by described second
Voltage amplification and to amplified second common voltage provide DC voltage component.
Preferably, the amplification factor of first amplifying circuit and the second amplifying circuit is identical, and the DC voltage provided
Component is identical.
Circuit occurs for common voltage provided by the utility model, and common electrical is generated by main controller controls digital analog converter
Pressure, and by the common voltage respectively via inverter circuit and follower circuit with generate amplitude it is identical, opposite in phase first
Common voltage and the second common voltage, meet the needs of HVA display devices are to common voltage.
Description of the drawings
By referring to the drawings to the description of the utility model embodiment, above-mentioned and other mesh of the utility model
, feature and advantage will be apparent from, in the accompanying drawings：
Fig. 1 shows the circuit diagram of common voltage generation circuit in the prior art；
Fig. 2 shows the circuit diagrams that circuit occurs according to the common voltage that one embodiment of the utility model provides.
Specific implementation mode
Hereinafter reference will be made to the drawings is more fully described the various embodiments of the utility model.In various figures, identical
Element is indicated using same or similar reference numeral.For the sake of clarity, the various pieces in attached drawing are not drawn to paint
System.
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.
Fig. 2 shows the circuit diagrams that circuit occurs according to the common voltage that one embodiment of the utility model provides.Such as Fig. 2 institutes
Show, it includes that circuit 13 and the occur for master controller 11, digital analog converter 12, the first common voltage that circuit, which occurs, for the common voltage
Circuit 14 occurs for two common voltages.
Wherein, master controller 11 is for providing control signal.
In the present embodiment, the master controller 11 is connected with the digital analog converter 12 via I2C buses, is used for institute
It states digital analog converter 12 and control signal is provided, wherein the control signal includes clock signal and voltage signal.Master controller 11
For microprocessing unit (Microcontroller Unit, MCU), including clock end SCL and data terminal SDA.Wherein, the clock
SCL is held to be used for tranmitting data register signal；Data terminal SDA is for sending voltage signal.I2C buses are developed by PHILIPS companies
Twin wire universal serial bus, including clock end SCL and data terminal SDA, to realize synchronous data communication.
Digital analog converter 12 is connected with the master controller 11, for generating analog voltage according to the control signal.
In the present embodiment, digital analog converter 12 generates analog voltage Vcom according to clock signal and voltage signal.
First common voltage occurs circuit 13 and is connected with the digital analog converter 12, for the analog voltage to be converted into
First common voltage Vcom1.
In the present embodiment, it includes inverter circuit 131 that circuit 13, which occurs, for first common voltage, for generation and institute
State the first common voltage Vcom1 of analog voltage Vcom opposite in phase.
The inverter circuit 131 includes the first operational amplifier U1, first resistor R1 and the first feedback resistance Rref1.
Wherein, the first operational amplifier U1 includes normal phase input end, inverting input and output end, and the first amplifier amplifier U1 is just
Phase input end grounding, inverting input are connected via first resistor R1 with digital analog converter 12, the first feedback resistance Rref1 connections
Between inverting input and output end.Wherein, the resistance value of first resistor R1 and the first feedback resistance Rref1 are identical.
Second common voltage occurs circuit 14 and is connected with the digital analog converter 12, for turning the analog voltage Vcom
Change the second common voltage Vcom2 into.
In the present embodiment, it includes follower circuit 141 that circuit 14, which occurs, for second common voltage, for generation and institute
State the identical second common voltage Vcom2 of analog voltage Vcom phases.
The follower circuit 141 includes second operational amplifier U2, second resistance R2 and the second feedback resistance Rref2；
Wherein, second operational amplifier U2 includes normal phase input end, inverting input and output end, and second operational amplifier U2 is just
Phase input terminal is connected via second resistance R2 with digital analog converter 12；Second feedback resistance Rref2 be connected to inverting input with
Between output end.
In a preferred embodiment, it further includes the first amplifying circuit 132 that circuit 13, which occurs, for first common voltage,
For the first common voltage Vcom1 to be amplified and provides DC voltage point to amplified first common voltage Vcom1
Amount.
In a preferred embodiment, it further includes the second amplifying circuit 142 that circuit 14, which occurs, for second common voltage,
For the second common voltage Vcom2 to be amplified and provides DC voltage point to amplified second common voltage Vcom2
Amount.
In the present embodiment, first amplifying circuit 141 is identical with the amplification factor of the second amplifying circuit 142, and carries
The DC voltage component of confession is identical.
Wherein, the first common voltage Vcom1 is synchronous with the second common voltage Vcom2 but opposite in phase.
Circuit occurs for common voltage provided by the utility model, and common electrical is generated by main controller controls digital analog converter
Pressure, and by the common voltage respectively via inverter circuit and follower circuit with generate amplitude it is identical, opposite in phase first
Common voltage and the second common voltage and the first common voltage and the second common voltage pass through the first amplifying circuit and the respectively
Two amplifying circuits amplify, and load DC voltage component respectively in the first common voltage and the second common voltage, reach liquid crystal
Voltage volt value needed for deflection, meets the needs of HVA display devices are to common voltage.
It is as described above according to the embodiments of the present invention, these embodiments there is no all details of detailed descriptionthe,
The specific embodiment that the invention is only described is not limited yet.Obviously, as described above, can make many modifications and variations.This
These embodiments are chosen and specifically described to specification, be in order to preferably explain the principles of the present invention and practical application, from
And skilled artisan is enable to make well using the utility model and modification on the basis of the utility model
With.The utility model is limited only by the claims and their full scope and equivalents.
Claims (10)
1. circuit occurs for a kind of common voltage, which is characterized in that including：
Master controller, for providing control signal；
Digital analog converter is connected with the master controller, for generating analog voltage according to the control signal；
Circuit occurs for the first common voltage, is connected with the digital analog converter, for the analog voltage to be converted into the first public affairs
Common voltage；
Circuit occurs for the second common voltage, is connected with the digital analog converter, for the analog voltage to be converted into amplitude phase
With the second common voltage；
Wherein, first common voltage is to exchange common voltage, and amplitude is identical, phase phase with second common voltage
Instead.
2. circuit occurs for common voltage according to claim 1, which is characterized in that the master controller turns with the digital-to-analogue
Parallel operation is connected via I2C buses.
3. circuit occurs for common voltage according to claim 2, which is characterized in that the control signal includes clock signal
And voltage signal.
4. circuit occurs for common voltage according to claim 3, which is characterized in that circuit occurs for first common voltage
Including inverter circuit, for generating and the first common voltage of the analog voltage opposite in phase.
5. circuit occurs for common voltage according to claim 4, which is characterized in that the inverter circuit includes the first fortune
Calculate amplifier, first resistor and the first feedback resistance；
Wherein, the first operational amplifier includes normal phase input end, inverting input and output end,
Positive input end grounding, inverting input are connected via first resistor with digital analog converter,
First feedback resistance is connected between inverting input and output end.
6. circuit occurs for common voltage according to claim 4, which is characterized in that circuit occurs for second common voltage
Including follower circuit, for generating the second common voltage identical with the analog voltage phase.
7. circuit occurs for common voltage according to claim 6, which is characterized in that the follower circuit includes the second fortune
Calculate amplifier, second resistance and the second feedback resistance；
Wherein, second operational amplifier includes normal phase input end, inverting input and output end,
Normal phase input end is connected via second resistance with digital analog converter；
Second feedback resistance is connected between inverting input and output end.
8. circuit occurs for common voltage according to claim 6, which is characterized in that circuit occurs for first common voltage
Further include the first amplifying circuit, for amplifying first common voltage and being provided directly to amplified first common voltage
Flow component of voltage.
9. circuit occurs for common voltage according to claim 8, which is characterized in that circuit occurs for second common voltage
Further include the second amplifying circuit, for amplifying second common voltage and being provided directly to amplified second common voltage
Flow component of voltage.
10. circuit occurs for common voltage according to claim 9, which is characterized in that first amplifying circuit and second
The amplification factor of amplifying circuit is identical, and the DC voltage component provided is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721101502.9U CN207663771U (en) | 2017-08-30 | 2017-08-30 | Circuit occurs for common voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721101502.9U CN207663771U (en) | 2017-08-30 | 2017-08-30 | Circuit occurs for common voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207663771U true CN207663771U (en) | 2018-07-27 |
Family
ID=62935847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721101502.9U Active CN207663771U (en) | 2017-08-30 | 2017-08-30 | Circuit occurs for common voltage |
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| CN (1) | CN207663771U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109166540A (en) * | 2018-09-11 | 2019-01-08 | 昆山龙腾光电有限公司 | A kind of exchange public voltage generating circuit and liquid crystal display device |
| CN109509447A (en) * | 2018-12-19 | 2019-03-22 | 惠科股份有限公司 | Common voltage integrated circuit and display device |
| CN109523973A (en) * | 2018-12-25 | 2019-03-26 | 惠科股份有限公司 | Common voltage generating circuit and display panel |
| CN110148386A (en) * | 2019-05-08 | 2019-08-20 | 深圳市华星光电技术有限公司 | Common voltage provides circuit and display panel |
| CN110675796A (en) * | 2019-09-25 | 2020-01-10 | 昆山龙腾光电股份有限公司 | Wide-narrow viewing angle switching circuit, display device and viewing angle control method |
| CN111640404A (en) * | 2020-06-10 | 2020-09-08 | 昆山龙腾光电股份有限公司 | Wide-narrow viewing angle switching circuit and display device thereof |
| CN112382248A (en) * | 2020-11-06 | 2021-02-19 | 昆山龙腾光电股份有限公司 | Drive circuit and display device |
| CN114023280A (en) * | 2021-11-18 | 2022-02-08 | 深圳市华星光电半导体显示技术有限公司 | Voltage control circuit and display panel |
-
2017
- 2017-08-30 CN CN201721101502.9U patent/CN207663771U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109166540A (en) * | 2018-09-11 | 2019-01-08 | 昆山龙腾光电有限公司 | A kind of exchange public voltage generating circuit and liquid crystal display device |
| CN109166540B (en) * | 2018-09-11 | 2020-11-24 | 昆山龙腾光电股份有限公司 | Alternating current public voltage generating circuit and liquid crystal display device |
| CN109509447A (en) * | 2018-12-19 | 2019-03-22 | 惠科股份有限公司 | Common voltage integrated circuit and display device |
| CN109509447B (en) * | 2018-12-19 | 2020-08-04 | 惠科股份有限公司 | Common voltage integrated circuit and display device |
| CN109523973A (en) * | 2018-12-25 | 2019-03-26 | 惠科股份有限公司 | Common voltage generating circuit and display panel |
| CN110148386A (en) * | 2019-05-08 | 2019-08-20 | 深圳市华星光电技术有限公司 | Common voltage provides circuit and display panel |
| CN110675796A (en) * | 2019-09-25 | 2020-01-10 | 昆山龙腾光电股份有限公司 | Wide-narrow viewing angle switching circuit, display device and viewing angle control method |
| CN111640404A (en) * | 2020-06-10 | 2020-09-08 | 昆山龙腾光电股份有限公司 | Wide-narrow viewing angle switching circuit and display device thereof |
| CN112382248A (en) * | 2020-11-06 | 2021-02-19 | 昆山龙腾光电股份有限公司 | Drive circuit and display device |
| CN112382248B (en) * | 2020-11-06 | 2022-02-15 | 昆山龙腾光电股份有限公司 | Drive circuit and display device |
| CN114023280A (en) * | 2021-11-18 | 2022-02-08 | 深圳市华星光电半导体显示技术有限公司 | Voltage control circuit and display panel |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Patentee after: InfoVision Optoelectronics(Kunshan)Co.,Ltd. Address before: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Patentee before: INFOVISION OPTOELECTRONICS (KUNSHAN) Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |