CN207833373U - The generative circuit and display device of a kind of voltage generation circuit, gamma reference voltage - Google Patents
The generative circuit and display device of a kind of voltage generation circuit, gamma reference voltage Download PDFInfo
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- CN207833373U CN207833373U CN201820308254.3U CN201820308254U CN207833373U CN 207833373 U CN207833373 U CN 207833373U CN 201820308254 U CN201820308254 U CN 201820308254U CN 207833373 U CN207833373 U CN 207833373U
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- 230000005611 electricity Effects 0.000 claims description 11
- 230000006837 decompression Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 11
- 230000003321 amplification Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
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- 239000010409 thin film Substances 0.000 description 2
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- 230000005540 biological transmission Effects 0.000 description 1
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Abstract
The utility model provides the generative circuit and display device of a kind of voltage generation circuit, gamma reference voltage, is related to display technology field, for solving the problem of that gamma electric voltage can change therewith when analog voltage AVDD is adjusted.The voltage generation circuit includes voltage stabilizing division module and operational amplifying module, voltage stabilizing division module connect voltage input end, first voltage end and operational amplifying module input terminal, the output end of operational amplifying module connects voltage output end；Wherein, voltage stabilizing division module is for dividing the input voltage of voltage stabilizing division module to obtain stable first voltage, and first voltage is exported to operational amplifying module；Operational amplifying module exports amplified first voltage to voltage output end for amplifying first voltage.The voltage generation circuit can be used for providing supply voltage to the generation module of gamma reference voltage.
Description
Technical field
The utility model is related to the lifes of display technology field more particularly to a kind of voltage generation circuit, gamma reference voltage
At circuit and display device.
Background technology
Currently, Thin Film Transistor-LCD (Thin Film Transistor-Liquid Crystal
Display, TFT-LCD) product is widely used.As shown in Figure 1, liquid crystal display device includes system interface, voltage
Converter, gamma reference voltage generation unit, sequence controller, data drive circuit and scan drive circuit.
Currently, there are two types of the modes of gamma reference voltage generation unit generation gamma (Gamma) voltage, one kind is such as Fig. 2 institutes
Show, analog voltage AVDD is generated by multiple gamma electric voltages by resistance string partial pressure by ash stage circuit.It is another as shown in figure 3,
It is to be generated with P-Gamma IC (Progress-Gamma Integrated Circuit may be programmed gamma electric voltage integrated circuit)
The supply voltage of multiple gamma electric voltages, P-Gamma IC is also analog voltage AVDD.
Existing gamma reference voltage generation unit the problem is that, once analog voltage AVDD needs to adjust or AVDD
When Ripple (ripple) is excessive, the Gamma voltages generated can be caused also to change, this is not expected to.Especially
Be current TFT-LCD products analog voltage AVDD voltage can be different according to product characteristic and change, so the number adjusted compared with
It is more, and the adjustment of Gamma voltages is also troublesome, after the completion of the adjustment of Gamma voltages, if needing to adjust due to display picture etc.
Whole AVDD, Gamma voltages change therewith at this time, therefore Gamma voltages need to readjust again, lead to repeated work.
Utility model content
The embodiments of the present invention provide a kind of voltage generation circuit, the generative circuit of gamma reference voltage, display dress
It sets, for solving the problem of that gamma electric voltage can change therewith when analog voltage AVDD is adjusted.
In order to achieve the above objectives, the embodiments of the present invention adopt the following technical scheme that：
The embodiments of the present invention in a first aspect, provide a kind of voltage generation circuit, including voltage stabilizing division module and
Operational amplifying module, the voltage stabilizing division module connect the defeated of voltage input end, first voltage end and the operational amplifying module
Enter end, the output end of the operational amplifying module connects voltage output end；Wherein, the voltage stabilizing division module is used for described steady
The input voltage of pressure division module is divided to obtain stable first voltage, and the first voltage is exported to the operation
Amplification module；The operational amplifying module for amplifying the first voltage, and by the amplified first voltage export to
Voltage output end.
Optionally, the voltage stabilizing division module includes first resistor and zener diode；One end of the first resistor connects
The voltage input end is connect, the other end connects the first end of the input terminal and the zener diode of the operational amplifying module,
The second end of the zener diode connects the first voltage end.
Optionally, the operational amplifying module includes operational amplifier, second resistance and 3rd resistor；The operation amplifier
The in-phase end of device connects the output end of the operational amplifier by the 3rd resistor；The in-phase end of the operational amplifier is also
One end of the second resistance is connected, the other end of the second resistance connects the first voltage end, the operational amplifier
Reverse side connect the output end of the voltage stabilizing division module.
Optionally, the voltage generation circuit further includes voltage reduction module, and the voltage input end passes through the voltage reduction module
Connect the voltage stabilizing division module；Wherein, the voltage reduction module is used to the voltage of the voltage input end being reduced to the second electricity
Pressure, and the second voltage is exported to the voltage stabilizing division module.
Further, the voltage reduction module includes low pressure difference linear voltage regulator, the input of the low pressure difference linear voltage regulator
End connects the voltage input end, and output end connects the voltage stabilizing division module.
Optionally, the voltage generation circuit further includes the first filter module；First filter module connects the drop
The output end of die block and the first voltage end, the clutter of the output signal for reducing the voltage reduction module；And/or institute
It further includes the second filter module to state voltage generation circuit；Second filter module connects the output end of the operational amplifying module
With the first voltage end, the clutter of the output signal for reducing the operational amplifying module.
Optionally, first filter module includes the first capacitance；One end of first capacitance connects the decompression mould
The output end of block, the other end connect the first voltage end；And/or second filter module includes the second capacitance；Described
One end of two capacitances connects the output end of the operational amplifying module, and the other end connects the first voltage end.
The second aspect of the utility model provides a kind of generative circuit of gamma reference voltage comprising power supply module and
The generation module of gamma reference voltage, wherein the power supply module is voltage generation circuit as described in relation to the first aspect, the electricity
The voltage output end of pressure generative circuit connects the voltage input end of the generation module.
Optionally, the voltage input end of the voltage generation circuit connects power voltage terminal.
The third aspect of the utility model provides a kind of display device, includes the gamma benchmark electricity as described in second aspect
The generative circuit of pressure.
The embodiments of the present invention provide a kind of voltage generation circuit, the generative circuit of gamma reference voltage, display dress
Set, which includes voltage stabilizing division module and operational amplifying module, voltage stabilizing division module connect voltage input end,
The output end of the input terminal at first voltage end and operational amplifying module, operational amplifying module connects voltage output end.Wherein, voltage stabilizing
Division module is for dividing the input voltage of voltage stabilizing division module and being obtained stable first voltage, and by first voltage
Output to operational amplifying module, operational amplifying module exports amplified first voltage to electricity for amplifying first voltage
Press output end.
Based on this, by a control source to the voltage input end of voltage stabilizing division module, voltage stabilizing division module can be to the electricity
Pressure is divided and is obtained stable first voltage, and first voltage is exported to operational amplifying module；Operational amplifying module can
To amplify first voltage, and amplified first voltage is exported to voltage output end.So, it provides through this embodiment
Voltage generation circuit can obtain stable output voltage, which is not influenced by analog voltage.To which this is defeated
Go out voltage as the supply voltage of the generation module of gamma reference voltage to obtain gamma electric voltage when, can obtain stable and not
The gamma electric voltage that analog voltage can be followed to change.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of block diagram of existing TFT-LCD；
Fig. 2 is a kind of schematic diagram of the generation unit of the gamma reference voltage in TFT-LCD shown in FIG. 1；
Fig. 3 is another schematic diagram of the generation unit of the gamma reference voltage in TFT-LCD shown in FIG. 1；
Fig. 4 is a kind of block diagram for display device that the utility model embodiment provides；
Fig. 5 is the block diagram of the generative circuit of the gamma reference voltage of display device shown in Fig. 4；
Fig. 6 is one kind of the generation module of the gamma reference voltage in the generative circuit of gamma reference voltage shown in fig. 5
Schematic diagram；
Fig. 7 is the another of the generation module of the gamma reference voltage in the generative circuit of gamma reference voltage shown in fig. 5
Kind schematic diagram；
Fig. 8 is a kind of module map for voltage generation circuit that the utility model embodiment provides；
Fig. 9 is the module map for another voltage generation circuit that the utility model embodiment provides；
Figure 10 is the circuit structure diagram of voltage generation circuit shown in Fig. 9.
Reference numeral：
01- system interfaces；02- sequence controllers；03- scan drive circuits；04- data drive circuits；05- voltage transformations
Device；The generative circuit of 06- gamma reference voltages；061- power supply modules；The generation module of 062- gamma reference voltages；10- voltage stabilizings
Division module；20- operational amplifying modules；30- voltage reduction modules；The first filter modules of 40-；The second filter modules of 50-.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Fig. 4 is a kind of block diagram for display device that the utility model embodiment provides, which includes that system connects
Mouth 01, sequence controller 02, scan drive circuit 03, data drive circuit 04, voltage changer 05 and gamma reference voltage
Generative circuit 06.Wherein, system interface 01 can be used for exporting control signal to sequence controller 02, which is used for
Control scan drive circuit 03 and data drive circuit 04；System interface 01 can be also used for voltage changer 05 and gamma base
The 06 output supply voltage VDD of generative circuit of quasi- voltage.
In addition, display device provided in this embodiment can be mobile phone, tablet computer, television set, display, notebook electricity
Any product or component with display function such as brain, Digital Frame, navigator.
Unlike existing TFT-LCD products shown in FIG. 1, the generation electricity of gamma reference voltage provided in this embodiment
The supply voltage on road 06 is not analog voltage AVDD, and can be supply voltage VDD, thus either will be electric by ash stage circuit
Source voltage VDD generates multiple gamma electric voltages by resistance string partial pressure, or using supply voltage VDD as the power supply of P-Gamma IC
Voltage is not influenced, i.e. gamma reference voltage when P-Gamma IC being used in combination to generate multiple gamma electric voltages by analog voltage AVDD
Generative circuit 06 generate gamma electric voltage will not follow analog voltage AVDD change.
Fig. 5 is that the present embodiment provides a kind of block diagrams of the generative circuit 06 of the gamma reference voltage in Fig. 4, wherein gal
The generative circuit 06 of horse reference voltage includes the generation module 062 of power supply module 061 and gamma reference voltage, power supply module 061
Voltage output end connection generation module 062 voltage input end.
It should be noted that the present embodiment does not limit the structure of the generation module 062 of gamma reference voltage.It is exemplary, gal
The generation module 062 of horse reference voltage can be ash stage circuit as shown in FIG. 6, and the supply voltage of the ash stage circuit is power supply mould
The output voltage of block 061, in this case, it is possible to be carried out to the output voltage of above-mentioned power supply module 061 by the ash stage circuit
Electric resistance partial pressure, to obtain multiple gamma electric voltages.Again exemplary, the generation module 062 of gamma reference voltage may be such as Fig. 7 institutes
The supply voltage of the P-Gamma IC shown, the P-Gamma IC are the output voltage of power supply module 061, in this case, it is possible to
Multiple gamma electric voltages are obtained by P-Gamma IC.
Supply voltage by the generation module 062 of gamma reference voltage in this present embodiment is provided by power supply module 061,
And the output voltage of power supply module 061 is not influenced by analog voltage AVDD, is given birth to the generative circuit 06 of gamma reference voltage
At gamma electric voltage will not follow analog voltage AVDD change.
On this basis, in order to enable the output voltage VO UT of voltage generation circuit is more stable, it is preferred that power supply module
061 voltage input end connection power voltage terminal VDD.
Fig. 8 is a kind of block diagram of voltage generation circuit provided in this embodiment, which includes voltage stabilizing point
Die block 10 and operational amplifying module 20, voltage stabilizing division module 10 connect voltage input end VIN, first voltage end VV and operation and put
The input terminal of big module 20, the output end connection voltage output end VOUT of operational amplifying module 20.Wherein, voltage stabilizing division module 10
It is divided for the input voltage to voltage stabilizing division module 10 and obtains stable first voltage V1, and first voltage V1 is defeated
Go out to operational amplifying module 20, operational amplifying module 20 is used to amplify first voltage V1, and amplified first voltage V1 is defeated
Go out to voltage output end VOUT.Optionally, above-mentioned power supply module 061 can be above-mentioned voltage generation circuit.
On this basis, when by the voltage input end VIN of a control source to voltage stabilizing division module 10, voltage stabilizing division module
10 can divide the voltage and be obtained stable first voltage V1, and first voltage V1 is exported to operational amplifying module
20；Operational amplifying module 20 can amplify first voltage V1, and amplified first voltage V1 is exported to voltage output end
VOUT.So, the voltage generation circuit provided through this embodiment can obtain stable output voltage VO UT, the output
Voltage VOUT is not influenced by analog voltage AVDD.To using output voltage VO UT as the generation module of gamma reference voltage
When 062 supply voltage is to obtain gamma electric voltage, gamma stable and that analog voltage AVDD will not be followed to change can be obtained
Voltage.
On this basis, in order to enable the output voltage VO UT of voltage generation circuit is more stable, optionally, voltage stabilizing partial pressure
The voltage input end connection power voltage terminal VDD of module 10.
The circuit structure of voltage generation circuit shown in Fig. 8 is specifically illustrated below in conjunction with Figure 10.
Specifically, as shown in Figure 10, voltage stabilizing division module 10 includes first resistor R1 and zener diode D.Wherein, first
One end of resistance R1 connects voltage input end VIN, and the other end connects the input terminal and zener diode D of operational amplifying module 20
First end, the second end connection first voltage end VV of zener diode D.In the present embodiment, first voltage end VV can be grounded, i.e.,
The second end connection ground terminal GND of zener diode D.
Operational amplifying module 20 includes operational amplifier Q, second resistance R2 and 3rd resistor R3.Operational amplifier Q's is same
The output end that phase end passes through 3rd resistor R3 connection operational amplifiers Q；The in-phase end of operational amplifier Q is also connected with second resistance R2
One end, the reverse side of the other end connection first voltage end VV, operational amplifier Q of second resistance R2 connects voltage stabilizing division module
10 output end, the i.e. first end of zener diode D.
It should be noted that the connection type phase of the feeder ear of operational amplifier Q and ground terminal and existing operational amplifier Q
Together, i.e. feeder ear connecting analog voltage end AVDD, ground terminal connect ground terminal GND.Those skilled in the art are it is known that operational amplifier Q
The size of size and feeder ear transmission of electricity pressure of output voltage it is unrelated, therefore when analog voltage AVDD adjustment, operational amplifier Q's
Output voltage will not follow its variation；And AVDD ripple will not influence the output voltage of operational amplifier Q.
On this basis, for the ease of the selection of zener diode D, optionally, as shown in Figure 10, voltage generation circuit is also
Including voltage reduction module 30, voltage input end VIN connects voltage stabilizing division module 10 by voltage reduction module 30, specifically, voltage reduction module
30 input terminal connects voltage input end VIN, and output end connects voltage stabilizing division module 10.Wherein, voltage reduction module 30 is for will be electric
The voltage of pressure input terminal VIN is reduced to second voltage V2, and second voltage V2 is exported to voltage stabilizing division module 10.
In view of low pressure difference linear voltage regulator (full name in English：Low Dropout Regulator, English abbreviation：LDO) have
There is the characteristics of output voltage stabilization, output ripple and low, low noise, it is preferred that as shown in figure 9, the voltage reduction module in the present embodiment
30 include low pressure difference linear voltage regulator, and the input terminal of low pressure difference linear voltage regulator connects voltage input end VIN, and output end connection is steady
Press division module 10.
On this basis, in order to further increase voltage generation circuit provided in this embodiment output voltage stabilization
Property, optionally, as shown in figure 9, voltage generation circuit further includes the first filter module 40, the first filter module 40 connection decompression mould
The output end and first voltage end VV of block 30, the output signal for reducing voltage reduction module 30, the i.e. clutter of second voltage.
Optionally, as shown in figure 9, voltage generation circuit further includes the second filter module 50, the connection of the second filter module 50
The output end and first voltage end VV of operational amplifying module 20, the clutter of the output signal for operational amplifying module 20.
Again optional, voltage generation circuit may include the first filter module 40 and the second filter module 50, the first filtering
As hereinbefore, details are not described herein again for the effect of module 40 and the second filter module 50.
The structure of the first filter module 40 and the second filter module 50 is illustrated below.As shown in Figure 10,
One filter module 40 may include that one end of the first capacitance C1, the first capacitance C1 connects voltage reduction module 30, the i.e. output end of LDO,
The other end connects first voltage end VV.
Second filter module 50 may include one end connection operational amplifying module 20 of the second capacitance C2, the second capacitance C2,
That is the output end of the Q of operational amplifier, the other end connect first voltage end VV.
It should be noted that the first capacitance C1 of the present embodiment does not refer to a capacitance, but reduction decompression can be played
The general name of the capacitance of the clutter of the output signal of module 30, the present embodiment do not limit the capacitance number for constituting the first capacitance.Example
, the first filter module 40 may include a capacitance, can also be as shown in Figure 10, including two capacitances in parallel.Second electricity
The definition for holding C2 is identical as the principle of the first capacitance C1, and details are not described herein again.
Hereinafter, in conjunction with circuit structure as shown in Figure 10, the course of work of the voltage generation circuit of the present embodiment is carried out
It illustrates.
Specifically, first, input voltage VIN obtains the second piezoelectricity V2 by low pressure difference linear voltage regulator LDO, exemplary,
V2=2.5V, at this time the second piezoelectricity V2 easily changed with input voltage VIN, stability is slightly poor.Then by first resistor R1 and surely
Pressure diode D carries out stablizing partial pressure, obtains first voltage V1, exemplary, V1=1.2V.Next, by operational amplifier Q,
Second resistance R2,3rd resistor R3 double first voltage V1 to obtain output voltage VO UT, specifically, by adjusting
The size of two resistance R2 and 3rd resistor R3 adjusts amplification factor, you can obtains the output voltage VO UT of actual demand.
On this basis, as shown in figure 5, using the output voltage VO UT of voltage generation circuit, that is, power supply module 061 as gal
The supply voltage of the generation module 062 of horse reference voltage can obtain the stable gal that analog voltage AVDD will not be followed to change
Horse voltage.
Only specific embodiment of the present utility model, but protection scope of the utility model is not limited thereto, any
Those familiar with the art within the technical scope disclosed by the utility model, can easily think of the change or the replacement, all
It should cover and be within the protection scope of the utility model.Therefore, the scope of protection of the utility model should be with the claim
Subject to protection domain.
Claims (10)
1. a kind of voltage generation circuit, which is characterized in that including voltage stabilizing division module and operational amplifying module, the voltage stabilizing partial pressure
Module connect voltage input end, first voltage end and the operational amplifying module input terminal, the operational amplifying module it is defeated
Outlet connects voltage output end；
Wherein, the voltage stabilizing division module is used to be divided to obtain stable the to the input voltage of the voltage stabilizing division module
One voltage, and the first voltage is exported to the operational amplifying module；The operational amplifying module is for amplifying described the
One voltage, and the amplified first voltage is exported to voltage output end.
2. voltage generation circuit according to claim 1, which is characterized in that the voltage stabilizing division module includes first resistor
And zener diode；
One end of the first resistor connects the voltage input end, the other end connect the operational amplifying module input terminal and
The second end of the first end of the zener diode, the zener diode connects the first voltage end.
3. voltage generation circuit according to claim 1, which is characterized in that the operational amplifying module includes operation amplifier
Device, second resistance and 3rd resistor；
The in-phase end of the operational amplifier connects the output end of the operational amplifier by the 3rd resistor；The operation
The in-phase end of amplifier is also connected with one end of the second resistance, and the other end of the second resistance connects the first voltage
End, the reverse side of the operational amplifier connect the output end of the voltage stabilizing division module.
4. voltage generation circuit according to claim 1, which is characterized in that the voltage generation circuit further includes decompression mould
Block, the voltage input end connect the voltage stabilizing division module by the voltage reduction module；Wherein, the voltage reduction module is used to incite somebody to action
The voltage of the voltage input end is reduced to second voltage, and the second voltage is exported to the voltage stabilizing division module.
5. voltage generation circuit according to claim 4, which is characterized in that the voltage reduction module includes that low pressure difference linearity is steady
The input terminal of depressor, the low pressure difference linear voltage regulator connects the voltage input end, and output end connects the voltage stabilizing and divides mould
Block.
6. voltage generation circuit according to claim 4, which is characterized in that
The voltage generation circuit further includes the first filter module；First filter module connects the output of the voltage reduction module
End and the first voltage end, the clutter of the output signal for reducing the voltage reduction module；
And/or the voltage generation circuit further includes the second filter module；Second filter module connects the operation amplifier
The output end of module and the first voltage end, the clutter of the output signal for reducing the operational amplifying module.
7. voltage generation circuit according to claim 6, which is characterized in that
First filter module includes the first capacitance；One end of first capacitance connects the output end of the voltage reduction module,
The other end connects the first voltage end；
And/or second filter module includes the second capacitance；One end of second capacitance connects the operational amplifying module
Output end, the other end connects the first voltage end.
8. a kind of generative circuit of gamma reference voltage, which is characterized in that the generation including power supply module and gamma reference voltage
Module, wherein the power supply module is such as claim 1-7 any one of them voltage generation circuits, the voltage generation electricity
The voltage output end on road connects the voltage input end of the generation module.
9. the generative circuit of gamma reference voltage according to claim 8, which is characterized in that the voltage generation circuit
Voltage input end connects power voltage terminal.
10. a kind of display device, which is characterized in that the generation electricity including gamma reference voltage as claimed in claim 8 or 9
Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820308254.3U CN207833373U (en) | 2018-03-06 | 2018-03-06 | The generative circuit and display device of a kind of voltage generation circuit, gamma reference voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820308254.3U CN207833373U (en) | 2018-03-06 | 2018-03-06 | The generative circuit and display device of a kind of voltage generation circuit, gamma reference voltage |
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| Publication Number | Publication Date |
|---|---|
| CN207833373U true CN207833373U (en) | 2018-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820308254.3U Expired - Fee Related CN207833373U (en) | 2018-03-06 | 2018-03-06 | The generative circuit and display device of a kind of voltage generation circuit, gamma reference voltage |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109256104A (en) * | 2018-11-22 | 2019-01-22 | 惠科股份有限公司 | Display device, display panel voltage source system and its circuit |
| CN110989755A (en) * | 2019-11-26 | 2020-04-10 | Tcl华星光电技术有限公司 | Power supply control circuit and display device |
| CN110992870A (en) * | 2019-12-24 | 2020-04-10 | 昆山国显光电有限公司 | Drive chip and display device |
| WO2020103231A1 (en) * | 2018-11-22 | 2020-05-28 | 惠科股份有限公司 | Display device, and display panel power source system and circuit |
| CN112951157A (en) * | 2021-02-08 | 2021-06-11 | 京东方科技集团股份有限公司 | Gamma standard voltage and gamma driving voltage generating circuit and display device |
| CN114610105A (en) * | 2022-04-21 | 2022-06-10 | 绵阳惠科光电科技有限公司 | Reference voltage circuit, gamma voltage circuit and display device |
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2018
- 2018-03-06 CN CN201820308254.3U patent/CN207833373U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109256104A (en) * | 2018-11-22 | 2019-01-22 | 惠科股份有限公司 | Display device, display panel voltage source system and its circuit |
| WO2020103231A1 (en) * | 2018-11-22 | 2020-05-28 | 惠科股份有限公司 | Display device, and display panel power source system and circuit |
| CN109256104B (en) * | 2018-11-22 | 2024-04-12 | 惠科股份有限公司 | Display device, display panel power supply system and circuit thereof |
| CN110989755A (en) * | 2019-11-26 | 2020-04-10 | Tcl华星光电技术有限公司 | Power supply control circuit and display device |
| CN110989755B (en) * | 2019-11-26 | 2021-08-24 | Tcl华星光电技术有限公司 | Power supply control circuit and display device |
| CN110992870A (en) * | 2019-12-24 | 2020-04-10 | 昆山国显光电有限公司 | Drive chip and display device |
| WO2021129025A1 (en) * | 2019-12-24 | 2021-07-01 | 昆山国显光电有限公司 | Driving chip and display apparatus |
| US11776455B2 (en) | 2019-12-24 | 2023-10-03 | Kunshan Go-Visionox Opto-Electronics Co., Ltd | Driving chip and display apparatus |
| CN112951157A (en) * | 2021-02-08 | 2021-06-11 | 京东方科技集团股份有限公司 | Gamma standard voltage and gamma driving voltage generating circuit and display device |
| US11955068B2 (en) | 2021-02-08 | 2024-04-09 | Boe Technology Group Co., Ltd. | Gamma standard voltage generating circuit, gamma driving voltage generating circuit and display device |
| CN114610105A (en) * | 2022-04-21 | 2022-06-10 | 绵阳惠科光电科技有限公司 | Reference voltage circuit, gamma voltage circuit and display device |
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