CN209265997U - A kind of width viewing angle control signal generating circuit and display device - Google Patents
A kind of width viewing angle control signal generating circuit and display device Download PDFInfo
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- CN209265997U CN209265997U CN201822016337.8U CN201822016337U CN209265997U CN 209265997 U CN209265997 U CN 209265997U CN 201822016337 U CN201822016337 U CN 201822016337U CN 209265997 U CN209265997 U CN 209265997U
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Abstract
The utility model relates to width viewing angle control signal generating circuits, it include: comparator, including receiving the first input end of width view angle switch signal, the second input terminal for receiving benchmark voltage, comparison signal output end, the first feeder ear for receiving the first power supply signal；The comparison signal output end of controller, including input/output terminal, power supply receiving end, input/output terminal and comparator connects；Power supply provides module, and power supply provides module when providing second source signal to the controller of O volt, provides the first power supply signal of O volt to comparator.Width viewing angle control signal generating circuit provided by the utility model and display device are avoided that when controller is without operating voltage, the leakage current that width view angle switch signal generates makes controller endophyte diode current flow, controller power source receiving end is caused to there is electric leakage, thus the problem of influencing the stability of controller output, therefore the stability of circuit can be improved.
Description
Technical field
The utility model relates to field of display technology more particularly to a kind of width viewing angle control signal generating circuit and displays
Device.
Background technique
Since liquid crystal display device has many advantages, such as frivolous, energy saving, Low emissivity, do not flash, it is now widely used for
The electronic equipments such as TV, computer, mobile phone, digital camera.Liquid crystal display device is broadly divided into three types on mainstream market at present:
Twisted-nematic (Twisted Nematic, TN) type or super twisted nematic (Super Twisted Nematic, STN) type, plane
(In-Plane Switching, the IPS) type of conversion and vertical orientation (Vertical Alignment, VA) type.Mix visual angle
(Hybrid Viewing Angle) type is that a kind of liquid crystal display device of processing is improved on the basis of IPS type.HVA type liquid crystal
Showing device is to control the rotation of the liquid crystal molecule of liquid crystal layer by increasing electric field in the color membrane substrates side (CF, Color Filter)
Turn, to realize that the image of high quality is shown.HVA type liquid crystal display device is divided into wide viewing angle (WideViewing Angle, WVA)
Display pattern and narrow viewing angle (Narrow Viewing Angle, NVA) display pattern.
Fig. 1 shows the structural schematic diagram of the display device using width view angle switch circuit of the prior art.Due to existing rank
The HVA technology of section, Gamma, AC-VCOM waveform under narrow viewing angle etc. is different from wide viewing angle, in order to realize width view effect
Switching, as shown in Figure 1, the display device using width viewing angle control signal generating circuit of the prior art include system end 11 and
Mould group pcb board 12, mould group pcb board 12 include controller 121, AC-VCOM generation circuit 122, Gamma switching circuit 123,
In the design of HVA liquid crystal module pcb board, HVA interlock circuit needs a HVA switching signal from system end (to cut at width visual angle
Change signal), the signal is directly connected to the I/O port of controller at present, but HVA switching used in HVA technology at present
The high level of signal is 3.3V, low level 0V, when HVA liquid crystal module PCB does not power, the HVA switching from system end
When signal is high level, it may appear that when controller is without operating voltage, the I/O port voltage of controller may be 3.3V,
Controller endophyte diode may be switched on and cause the power supply receiving end of controller may be by width view angle switch in this way
Signal instead fills voltage, so that controller generates electric leakage, will affect the service life of microcontroller for a long time, leads to disabling controller
Effect, and it is likely to occur maloperation, such as code change, to influence the stability of circuit.
In view of the above-mentioned problems, Fig. 2 shows the width viewing angle control signal generating circuit structural representations in existing solution
Figure.As shown in Fig. 2, the width viewing angle control signal generating circuit in existing solution includes first resistor R1, second resistance
R2, voltage-stabilizing protection module 21 and switch tube elements T1.The first path terminal P3 of switch tube elements T1 exports the second width visual angle and cuts
Change the I/O port of signal to controller, the power port of supply voltage end P2 access controller, to export supply voltage extremely
Controller, the first width view angle switch signal provided from system end port P1 after voltage-stabilizing protection module 21, open by access
The grid of tube elements T1 is closed, the drain electrode and source electrode that switch tube elements T1 are respectively connected to the supply voltage end P2 and ground of controller, when
When the voltage signal of supply voltage end P2 output is low level, the first width view angle switch signal is high level, tube elements are switched
T1 conducting, so that the second width view angle switch signal for switching the first path terminal P3 output of tube elements is low level；Work as power supply
When the voltage signal of voltage end P2 output is low level, the first width view angle switch signal is low level, switch tube elements T1 is not
Conducting, so that the second width view angle switch signal for switching the first path terminal P3 output of tube elements is low level.Powering
When the voltage signal of voltage end P2 output is low level, no matter the first width view angle switch signal from system end port P1 is
No is high level, and the second width view angle switch signal of all guarantee access controller I/O ports is low level, to prevent
The case where first width view angle switch signal generates that voltage is counter fills to controller, i.e., generates electric leakage to the power port of controller,
Cause controller to fail, maloperation occur, therefore improves the stability of system.
But the component that the circuit in above-mentioned solution uses is more, the area for the pcb board that circuit occupies is larger,
To which integrated level is not high, and the first width view angle switch of the second width view angle switch signal and the system input of reality output
The level logic of signal is opposite, so that the controller in original circuit needs correspondence to be updated, cumbersome.Cause
This, it is necessary to provide improved technical solution so as to overcome the problems existing in the prior art.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of width viewing angle control signal generating circuit and display dresses
Set, can voltage is counter fills solving width view angle switch signal and generate to controller, i.e., width view angle switch signal is to controller
Power port generate leakage current, cause controller to fail, under the premise of there is maloperation, save component usage amount, reduce
The area of pcb board shared by circuit improves the integrated level of circuit.
To achieve the above object, the utility model embodiment first aspect provides a kind of width viewing angle control signal generation electricity
Road, comparator, the second input terminal of first input end, reception benchmark voltage including reception width view angle switch signal,
Comparison signal output end, the first feeder ear for receiving the first power supply signal；Controller, including input/output terminal, the second electricity of reception
The power supply receiving end of source signal, the input/output terminal are connect with the signal output end of the comparator；Power supply provides mould
Block, including exporting the first power supply signal end of first power supply signal and the second source signal of output second source signal
End, first power supply signal end export identical at the time of 0 volt of voltage with the second source signal end.
Further, the first input end is noninverting input, and second input terminal is reverse input end.
Further, the first input end is reverse input end, and second input terminal is noninverting input.
Further, first power supply signal end and the second source signal end are same signal end.
Further, the controller further includes ground terminal, and the comparator further includes the second feeder ear, and described second supplies
The ground terminal connect and ground at electric end and the controller.
Further, it further includes third power supply signal end that the power supply, which provides module, and the comparator further includes the second confession
Electric end, third power supply signal end are connect with second feeder ear, the voltage and institute that first power supply signal end provides
State the offer of third power supply signal end voltage level logic is opposite, voltage value is equal.
Further, the width viewing angle control signal generating circuit further includes connector, the connector and the ratio
It connects compared with the first input end of device to provide the width view angle switch signal, the institute of the connector and the comparator
The connection of the second input terminal is stated to provide the benchmark voltage.
In addition, to achieve the above object, the utility model embodiment second aspect provides a kind of display device, the display
Device includes width viewing angle control signal generating circuit described in first aspect.
Further, the display device further includes AC-VCOM generation circuit and Gamma switching circuit, the controller
It further include control signal output, the control signal output and the AC-VCOM generation circuit and Gamma switching circuit are equal
It is connected.
Width viewing angle control signal generating circuit provided by the utility model and display device pass through setting comparator, control
Device and power supply processed provide module, can not power in solving display device because of mould group pcb board, i.e., comparator and controller be all
There is no an operating voltage, but when width view angle switch signal is high level, since the I/O port input of controller has high electricity
Ordinary mail number, may generate that voltage is counter fills to controller, i.e., width view angle switch signal generates electric leakage to the power port of controller
Stream saves component usage amount under the premise of causing the change of controller output code to lead to the problem of maloperation, reduces circuit institute
The area for accounting for pcb board improves the integrated level of circuit, therefore, width viewing angle control signal generating circuit provided by the utility model
And display device stability is high and structure is simple.
Detailed description of the invention
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.
Fig. 1 shows the structural schematic diagram of the display device using width view angle switch circuit of the prior art.
Fig. 2 shows the width viewing angle control signal generating circuit structural schematic diagrams in existing solution.
Fig. 3 shows the structural schematic diagram of the width viewing angle control signal generating circuit of the utility model.
Fig. 4 shows the structural schematic diagram of the display device using width viewing angle control signal generating circuit shown in Fig. 3.
Specific embodiment
Hereinafter reference will be made to the drawings is more fully described the utility model.In various figures, identical element is using similar
Appended drawing reference indicate.For the sake of clarity, the various pieces in attached drawing are not necessarily to scale.In addition, may in figure
Certain well known parts are not shown.
Many specific details of the utility model, such as the structure of component, material, size, place are described hereinafter
Science and engineering skill and technology, to be more clearly understood that the utility model.But just as the skilled person will understand,
The utility model can not be realized according to these specific details.
Fig. 3 shows the structural schematic diagram of the width viewing angle control signal generating circuit of the utility model.
As shown in figure 3, the width viewing angle control signal generating circuit of the utility model first embodiment includes controller
320, comparator 321, power supply provide module 322.Comparator 321 includes the first input for receiving width view angle switch signal HVA
End, the second input terminal for receiving benchmark voltage DC, comparison signal output end vo ut, the first confession for receiving the first power supply signal
Electric end VS+.Controller 320 includes input/output terminal P4, power supply receiving end P5, the ratio of input/output terminal P4 and comparator 321
Compared with signal output end Vout connection.Power supply provide module 322 include output the first power supply signal the first power supply signal end V1 and
Export second source the signal end V2, second source signal end V2 of second source signal and the power supply receiving end P5 of controller 320
Connection, the first power supply signal end V1 export identical at the time of 0 volt of voltage with second source signal end V2, that is to say, that first
When power supply signal end V1 exports the voltage of 0V, second source signal end V2 also exports the voltage of 0V.
Specifically, in the present embodiment, the first power supply signal end V1 and second source signal end V2 is same signal end,
The operating voltage that can preferably guarantee comparator 321 and controller 320 in this way is 0V simultaneously.
In the present embodiment, controller 320 further includes ground terminal GND, and comparator 321 further includes the second feeder ear VS-,
The ground terminal GND connect and ground of second feeder ear VS- and controller 320.
It further includes third power supply signal end that power supply, which provides module 322, in another embodiment, and comparator 321 further includes the
Two feeder ear VS-, third power supply signal end are connect with the second feeder ear VS-, the voltage and that the first power supply signal end V1 is provided
The polarity of voltage that three power supply signal ends provide is opposite, voltage value is equal.
In the present embodiment, first input end is noninverting input, and the second input terminal is reverse input end.
In another embodiment, first input end is reverse input end, and the second input terminal is noninverting input.
It is below reverse input end by noninverting input, the second input terminal of first input end, the second of comparator 321 supplies
Illustrate the working principle of width view angle switch control signal generating circuit for electric end VS- ground connection:
Specifically, when comparator 321 and controller 320 can work normally, such as when power supply provides the of module 322
One power supply signal end V1 exports the first power supply signal of 3.3V, and the second source signal end V1 that power supply provides module 322 is also exported
When the second source signal of 3.3V, if width view angle switch signal HVA is high level, for example, 3.3V, benchmark voltage DC
Its voltage value is, for example, 1.8V, and the comparison signal output end vo ut of comparator 321 exports high level signal, thus controller 320
Export the first width viewing angle control signal；When width view angle switch signal HVA is converted to low level by high level and is, for example, 0V,
The comparison signal output end vo ut of comparator 321 exports low level signal, so that controller 320 exports the second width viewing angle control
Signal.Additionally due to the second feeder ear VS- of comparator 321 is grounded, and therefore, the comparison signal output end vo ut of comparator 321
The the second width view angle switch signal and the received first width view angle switch signal HVA of 321 first input end of comparator of output
Level logic it is identical, therefore the present embodiment width view angle switch control signal generating circuit in controller it is relatively existing
Controller 320 operates simpler without being updated.
Specifically, when comparator 321 and controller 320 all without operating voltage when, i.e., when power supply provide module 322 first
Power supply signal end V1 exports the first power supply signal of 0V, and the second source signal end V1 that power supply provides module 322 also exports 0V's
When second source signal, the reverse input end of comparator 321 has constant benchmark voltage DC (1.8V) at this time, compares at this time
Width view angle switch signal the HVA either high level or low level of the noninverting input of device 321, comparison signal output end
The voltage of Vout output can all be less than the conducting voltage of semiconductor element in controller 320 (being silicon diode in this example) for example
0.7V avoids width view angle switch signal HVA in this way and generates the power supply receiving end P5 that electric leakage flow to controller, damage control
Device leads to the waveform change of the width viewing angle control signal of output in turn and leads to the problem of maloperation.
It should be noted that the internal structure of controller illustrate only element relevant to leakage current, and its in Fig. 3
In related elements be also possible to other kinds of semiconductor element, corresponding electric conduction is determined according to the type of semiconductor element
Pressure.
In one embodiment, width view angle switch circuit further includes connector 323, connector 323 and comparator 321
First input end is connected to provide width view angle switch signal HVA, and connector 323 is connect with the second input terminal of comparator 321
To provide the benchmark voltage DC.
Width viewing angle control signal generating circuit provided by the embodiment of the utility model passes through setting comparator 321, control
Device 320 and power supply provide module 322, can solve mould group pcb board in a display device and do not power, i.e. comparator 321 and control
Device 320 processed all without operating voltage, but the width view angle switch signal HVA from system end be high level when, controller 320
I/O port P4 input have high level signal, leakage current is generated to controller 320, damage and then causes to control controller
Under the premise of the change of 320 output code of device leads to the problem of maloperation, component usage amount is saved, reduces pcb board shared by circuit
Area, improve the integrated level of circuit, and width view angle switch signal, that is, comparison signal output end vo ut of reality output is defeated
The level logic of comparison signal out may be controlled to, therefore the width of the present embodiment identical as width view angle switch signal HVA
The relatively existing controller of controller in view angle switch control signal generating circuit operates simpler without being updated.
Display device using width viewing angle control signal generating circuit shown in Fig. 3 is please shown referring next to Fig. 4, Fig. 4
Structural schematic diagram.
In the present embodiment, the present utility model application provides a kind of display device, and display device includes above-mentioned embodiment party
Width viewing angle control signal generating circuit in formula.
Furthermore, display device further includes AC-VCOM generation circuit 324 and Gamma switching circuit 325, controller
320 further include control signal output, control signal output and AC-VCOM generation circuit 324 and Gamma switching circuit 325
It is connected, for exporting width viewing angle control signal to AC-VCOM generation circuit 324 and Gamma switching circuit 325.
Specifically, the switching at width visual angle includes the gamma electric voltage (Gamma) under wide viewing angle and narrow viewing angle, adaptive color
Coloured silk control (Adaptive Color Control, Acc), the frequent rate control (Frame Rate Control, FRC) of vibration, movement
Estimation and motion compensation (Motion Estimate And Motion Compensation, MEMC), spread-spectrum control
(Spread Spectrum Control, SSC), dynamic backlight control (Dynamic Backlight Control, DBC), black
Frame is inserted into (Black Frame Insertion, BFI), unlimited dye technology (Infinity Color Technology, ICT)
Etc. data transformation, controller 320 export width view angle switch control signal waveform signal control above-mentioned all data
Convert the switching to realize width visual angle.
The utility model embodiment provides display device and provides module by setting comparator 321, controller 320 and power supply
322, it can solve mould group pcb board in a display device and do not power, i.e., comparator 321 and controller 320 are all without work electricity
Pressure, but the width view angle switch signal HVA from system end be high level when, controller 320 I/O port P4 input
There is high level signal, leakage current is generated to controller 320, the change of 320 output code of controller is caused to lead to the problem of maloperation
Under the premise of, component usage amount is saved, the area of pcb board shared by circuit is reduced, improves the integrated level of circuit, and practical defeated
The level logic of the comparison signal of width view angle switch signal out, that is, comparison signal output end vo ut output may be controlled to
Width view angle switch signal HVA is identical, therefore the controller in the width view angle switch control signal generating circuit of the present embodiment
Relatively existing controller operates simpler without being updated.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
It is as described above according to the embodiments of the present invention, these embodiments details all there is no detailed descriptionthe,
Also not limiting the utility model is only the specific embodiment.Obviously, as described above, many modification and change can be made
Change.These embodiments are chosen and specifically described to this specification, is in order to preferably explain the principles of the present invention and actually to answer
With so that skilled artisan be enable to utilize the utility model and repairing on the basis of the utility model well
Change use.
Claims (9)
1. a kind of width viewing angle control signal generating circuit characterized by comprising
Comparator, the second input terminal of first input end, reception benchmark voltage including reception width view angle switch signal,
Comparison signal output end, the first feeder ear for receiving the first power supply signal；
Controller, including input/output terminal, receive second source signal power supply receiving end, the input/output terminal with it is described
The signal output end of comparator connects；
Power supply provides module, including exporting the first power supply signal end of first power supply signal and exporting second source signal
Second source signal end, first power supply signal end export identical at the time of 0 volt of voltage with the second source signal end.
2. width viewing angle control signal generating circuit according to claim 1, which is characterized in that the first input end is
Noninverting input, second input terminal are reverse input end.
3. width viewing angle control signal generating circuit according to claim 1, which is characterized in that the first input end is
Reverse input end, second input terminal are noninverting input.
4. width viewing angle control signal generating circuit according to claim 1, which is characterized in that first power supply signal
End is same signal end with the second source signal end.
5. width viewing angle control signal generating circuit according to claim 4, which is characterized in that the controller further includes
Ground terminal, the comparator further include the second feeder ear, and second feeder ear is connect with the ground terminal of the controller
And it is grounded.
6. width viewing angle control signal generating circuit according to claim 1, which is characterized in that the power supply provides module
It further include third power supply signal end, the comparator further includes the second feeder ear, third power supply signal end and described second
Feeder ear connection, the polarity of voltage phase that the voltage that first power supply signal end provides is provided with third power supply signal end
Instead, voltage value is equal.
7. width viewing angle control signal generating circuit according to claim 1, which is characterized in that it further include connector, institute
Connector is stated to be connect with the first input end of the comparator to provide the width view angle switch signal, the connector
It connect with second input terminal of the comparator to provide the benchmark voltage.
8. a kind of display device, which is characterized in that produced including the described in any item width viewing angle control signals of such as claim 1-7
Raw circuit.
9. display device according to claim 8, which is characterized in that further include AC-VCOM generation circuit and Gamma switching
Circuit, the controller further include control signal output, the control signal output and the AC-VCOM generation circuit and
Gamma switching circuit is connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822016337.8U CN209265997U (en) | 2018-12-03 | 2018-12-03 | A kind of width viewing angle control signal generating circuit and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822016337.8U CN209265997U (en) | 2018-12-03 | 2018-12-03 | A kind of width viewing angle control signal generating circuit and display device |
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| CN209265997U true CN209265997U (en) | 2019-08-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110767193A (en) * | 2019-11-11 | 2020-02-07 | 昆山龙腾光电股份有限公司 | Alternating-current public voltage generating circuit and method and display device |
-
2018
- 2018-12-03 CN CN201822016337.8U patent/CN209265997U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110767193A (en) * | 2019-11-11 | 2020-02-07 | 昆山龙腾光电股份有限公司 | Alternating-current public voltage generating circuit and method and display device |
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Address after: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Patentee after: Kunshan Longteng Au Optronics Co Address before: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Patentee before: Kunshan Longteng Optronics Co., Ltd. |