CN102222485B - Voltage stabilizing circuit module with temperature compensation function - Google Patents
Voltage stabilizing circuit module with temperature compensation function Download PDFInfo
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- CN102222485B CN102222485B CN201110144231.6A CN201110144231A CN102222485B CN 102222485 B CN102222485 B CN 102222485B CN 201110144231 A CN201110144231 A CN 201110144231A CN 102222485 B CN102222485 B CN 102222485B
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Abstract
A voltage stabilizing circuit module with temperature compensation comprises a temperature sensing unit, a voltage generating unit and a pixel voltage stabilizing unit. The temperature sensing unit outputs a temperature signal according to the ambient temperature. The voltage generating unit outputs corresponding grid driving voltage and picture reference voltage according to the temperature signal. The pixel voltage stabilizing unit receives the picture reference voltage, limits the level of the picture reference voltage according to a limit voltage, and outputs at least one pixel driving voltage which is not sensitive to temperature.
Description
Technical field
The invention relates to a kind of voltage stabilizing circuit module, especially a kind ofly can export the gate drive voltage with temperature effect simultaneously, and the voltage stabilizing circuit module of temperature independent pixel drive voltage.
Background technology
Along with thin film transistor (TFT) manufacturing technology is progressive fast, the advantages such as liquid crystal display is frivolous owing to having possessed, power saving, radiationless line, are therefore applied in the various electronic products such as notebook computer panel, computer screen, TV, mobile phone in large quantities.Film liquid crystal display (Thin Film Transistor Liquid Crystal Display, TFT-LCD) be to utilize thin film transistor (TFT) (Thin Film Transistor, TFT) a kind of display device being made, its main principle of operation is with galvanism liquid crystal molecule, produces point, line, surface and coordinates back fluorescent tube to form picture.
Specifically, film liquid crystal display is in the middle of two sheet glass substrates, to pour into one deck liquid crystal (Liquid Crystal).The glass substrate on upper strata can be coated with the glass (or claiming colored filter) of intensive alternate red, green, blue three looks, and the glass substrate of lower floor has transistor to be embedded in.After thering is the glass substrate of transistor circuit, separately dispose a backlight.Therefore, when applying voltage drive transistor, electric current produces electric field change by transistor, makes the liquid crystal between two sheet glass substrates start to rotate, and by the rotation of liquid crystal, controls the number of backlight light penetration.When light penetration colored filter (Color Filter), film liquid crystal panel can produce color change and demonstrate image.
In general, in active-matrix liquid crystal display (Active Matrix Liquid Crystal Display), in each pixel (Pixel), all can there is a TFT, its grid (Gate) is connected to horizontal direction sweep trace, drain electrode (Drain) is connected to the data line of vertical direction, and source electrode (Source) is connected to pixel electrode.While applying enough positive voltages on a certain sweep trace in the horizontal direction, can make TFT all on this line open, now the pixel electrode on this line can be connected with the data line of vertical direction, and by the video voltage writing pixel on data line, control by this penetrability of different liquid crystal, and then reach the effect of controlling color.
At present, this kind of driving circuit can pass through array base palte type Driving technique (Gate Driver on Array, GOA), directly gate driver circuit (Gate driver ICs) is produced on array (Array) substrate, with the driving chip that replaces being made by external silicon.The application of this kind of technology can be embodied directly in around panel, reduces production process, and reduces cost of products.Yet, it should be noted that, this technical relation is to the problem of processing procedure aspect, that is to say, when driving circuit is under cold-starting and normal temperature start, the two required gate drive voltage is not identical, if by the driving voltage of grid according to one of them, can cause meaningless power dissipation, or be the problem that transistor cannot drive.
If consider above problem, and while selecting dynamically along with environment temperature modulation grid driving voltage, will have influence in the lump the magnitude of voltage that drives pixel electrode.In the case, when the driving voltage of each pixel is affected and while changing, the angle imbalance that will make liquid crystal rotate, and then cause the distortion of Display panel color.Therefore, in the situation that considering environment temperature, how on gate drive voltage and Display panel color, to obtain a preferably balance, real is those skilled in the art's problems in the urgent need to address at present.
Summary of the invention
In view of more than, the invention relates to a kind of voltage stabilizing circuit module with temperature compensation, when being applied to film liquid crystal display, can take into account " gate drive voltage is along with temperature dynamic changes ", and the demand of " the normal display color of panel ", use the problem that known technology exists that solves.
The invention relates to a kind of voltage stabilizing circuit module with temperature compensation, comprising: a temperature sensing unit, a voltage generation unit and a pixel voltage stabilization element.Temperature sensing unit is exported a temperature signal according to an environment temperature.Voltage generation unit, according to this temperature signal, is exported corresponding a gate drive voltage and a picture reference voltage.Pixel voltage stabilization element receives this picture reference voltage, and according to after the level of this picture reference voltage of spacing limiting voltage, exports at least one pixel drive voltage.
According to one embodiment of the invention, wherein pixel voltage stabilization element comprises a voltage stabilizing separation circuit and a pixel bleeder circuit.Voltage stabilizing separation circuit receives picture reference voltage, and with after spacing voltage pressure limiting, the gamma applied voltage that output one and temperature are noninductive.Pixel bleeder circuit receives gamma applied voltage, and is at least one pixel drive voltage by gamma applied voltage dividing potential drop.
According to one embodiment of the invention, wherein gamma applied voltage and pixel drive voltage are all irrelevant with environment temperature.
According to one embodiment of the invention, wherein voltage generation unit comprises a power chip, a booster circuit and a voltage-multiplying circuit.Power chip is according to the temperature signal of temperature sensing unit output, and parameter is controlled in output one.Booster circuit is controlled parameter according to this, and voltage signal is switched in output one.Voltage-multiplying circuit receives this switched voltage signal, and carries out voltage charging according to this switched voltage signal, to export gate drive voltage.
According to one embodiment of the invention, wherein voltage stabilizing separation circuit can comprise one first electric capacity, one first resistance, one first Zener diode, one second electric capacity and one the 3rd electric capacity.The first end of the first electric capacity connects picture reference voltage, the second end ground connection of the first electric capacity.The first end of the first resistance connects picture reference voltage, and the second end of the first resistance connects gamma applied voltage.The first end of the first Zener diode connects the second end of the first resistance, the second end ground connection of the first Zener diode.The second electric capacity is connected the second end of the first resistance, the second end ground connection of the second electric capacity and the 3rd electric capacity jointly with the first end of the 3rd electric capacity.
According to another embodiment of the present invention, wherein voltage stabilizing separation circuit also can comprise one the 4th electric capacity, one second resistance, one the 3rd resistance, one the 4th resistance and one second Zener diode.The first end of the 4th electric capacity connects picture reference voltage, the second end ground connection of the 4th electric capacity.The first end of the second resistance connects picture reference voltage, and the second end of the second resistance connects gamma applied voltage.The first end of the second Zener diode connects the second end of the second resistance, the second end ground connection of the second Zener diode.The first end of the 3rd resistance connects the second end of the second resistance, and the first end of the 4th resistance connects the second end of the 3rd resistance, the second end ground connection of the 4th resistance.
Therefore the voltage stabilizing circuit module with temperature compensation that the present invention proposes, can be by voltage stabilizing separation circuit, change the picture reference voltage relevant with environment temperature and be the not pixel drive voltage of temperature influence.By this, the voltage stabilizing circuit module that application the present invention has temperature compensation is when film liquid crystal display, although under different environment temperatures, film liquid crystal display all can drive array base palte in the situation that not producing excessive power drain, and the problem of the known color distortion of simultaneously preventing.
Relevant for description of contents of the present invention, be in order to demonstration and explain spirit of the present invention and principle with following embodiment, and provide patent claim of the present invention further to explain above.About feature of the present invention, implementation and effect, hereby coordinate graphicly do preferred embodiment, to be described in detail as follows.
Accompanying drawing explanation
Fig. 1 is for having the circuit block diagram of the voltage stabilizing circuit module of temperature compensation according to the embodiment of the present invention.
Fig. 2 is according to the internal circuit schematic diagram of the voltage generation unit of Fig. 1.
Fig. 3 A is according to the circuit diagram of the voltage stabilizing separation circuit of the embodiment of the present invention.
Fig. 3 B is the circuit diagram of voltage stabilizing separation circuit according to another embodiment of the present invention.
Fig. 4 is for being connected to the circuit block diagram of gain circuitry according to the voltage stabilizing circuit module of the embodiment of the present invention.
Fig. 5 A is according to the circuit diagram of the gain circuitry of the embodiment of the present invention.
Fig. 5 B is the circuit diagram of gain circuitry according to another embodiment of the present invention.
Fig. 6 A is according to the voltage stabilizing circuit module shown in Fig. 2, carries out at normal temperatures the experimental data figure of emulation.
Fig. 6 B is according to the voltage stabilizing circuit module shown in Fig. 2, carries out at low temperatures the experimental data figure of emulation.
[main element label declaration]
100 temperature sensing unit 200 voltage generation units
202 power chip 204 booster circuits
206 voltage-multiplying circuit 300 pixel voltage stabilization elements
302 voltage stabilizing separation circuit 304 pixel bleeder circuits
400 gain circuitries
Embodiment
In embodiment, describe below detailed features of the present invention and advantage in detail, its content is enough to make any those skilled in the art understand technology contents of the present invention and implement according to this, and according to the disclosed content of this instructions, claim and graphic, any those skilled in the art can understand object and the advantage that the present invention is relevant easily.
Fig. 1 is for having the circuit block diagram (circuit block diagram) of the voltage stabilizing circuit module of temperature compensation according to the embodiment of the present invention, this kind of voltage stabilizing circuit module is suitable for driving on (Gate Driver on Array, GOA) substrate and producing at least one and the pixel drive voltage of temperature noninductive (temperature-independent) in array basal plate type.And voltage stabilizing circuit module can be simultaneously along with environment temperature, the gate drive voltage on dynamic modulation substrate, to take into account power consumption and the demand of exporting normal color on panel.Pixel drive voltage in the present embodiment refers in film liquid crystal display, is used for driving pixel electrode, to control the voltage of output color.And noninductive with temperature, what refer to is the absolute voltage value not changing with environment temperature.
As shown in Figure 1, voltage stabilizing circuit module includes a temperature sensing unit 100, a voltage generation unit 200 and a pixel voltage stabilization element 300.Temperature sensing unit 100 is in order to testing environment temperature, and according to different environment temperatures, exports corresponding temperature signal V
t.Voltage generation unit 200 is in order to receive temperature signal V
t, and output is corresponding to temperature signal V
tgate drive voltage V
gwith picture reference voltage AVDD.As can be seen here, the voltage stabilizing circuit module of the present embodiment, can control gate drive voltage V via temperature sensing unit 100 and voltage generation unit 200
gwith the magnitude of voltage of picture reference voltage AVDD, its capable of dynamic is changed along with environment temperature.
Pixel voltage stabilization element 300 is in order to receive picture reference voltage AVDD, and the continuous level that limits picture reference voltage AVDD with a spacing voltage (being detailed later), after being locked with the voltage level at picture reference voltage AVDD, be output as at least one pixel drive voltage V
gAMMA.In one embodiment, 300 output pixel driving voltage V of pixel voltage stabilization element
gAMMAnumber can be one or more voltage, need be depending on the pixel transistor number having in film liquid crystal display, not in order to limit invention scope of the present invention.
Fig. 2 is according to the internal circuit schematic diagram of the voltage generation unit of Fig. 1, as seen from Figure 2, voltage generation unit 200 comprises a power chip (Power IC) 202, one booster circuit (Boost Circuit) 204 and one voltage-multiplying circuit (Charge Pumper) 206.Wherein, power chip 202 receives the temperature signal V of temperature sensing unit 100 outputs
t, and export a control V parameter
x, to determine the control radix (radix) of booster circuit 204.Booster circuit 204 is according to controlling V parameter
xwith a voltage source V
in, voltage signal V is switched in output one
s.According to one embodiment of the invention, this switching voltage signal V
sbe one to there is the switching signal (switching signal) of switch conduction cycle (duty ratio).Therefore, when voltage-multiplying circuit 206 receives switched voltage signal V
safter, voltage-multiplying circuit 206 can be according to switched voltage signal V
sswitch periods, carry out discharging and recharging of voltage, to export the final gate drive voltage V driving for transistor gate
g.By this, the voltage generation unit 200 that the present invention proposes utilizes the dynamic change of temperature sensing unit 100 detection ambient temperatures, the switched voltage signal V being exported for control radix and the booster circuit 204 of booster circuit 204 to change power chip 202
s, and then reach gate drive voltage V
gthe object that can dynamically adjust along with ambient temperature.
Say further, suppose that voltage generation unit 200 for example, when environment temperature is a preset temperature (being set as 25 degree), the gate drive voltage V that can export
git is a default gate drive voltage.So, when temperature sensing unit 100 senses environment temperature and drops to lower than this preset temperature, power chip 202 can start to reduce the control V parameter of booster circuit 204
x, to improve the switched voltage signal V of booster circuit 204 outputs
s, by this, voltage-multiplying circuit 206 exportable is higher than the gate drive voltage signal V of this default gate drive voltage
g; On the contrary, the environment temperature sensing when temperature sensing unit 100 is during higher than this preset temperature, and 202 of power chips can improve the control V parameter of booster circuit 204
x, to reduce the switched voltage signal V of booster circuit 204 outputs
s, by this, voltage-multiplying circuit 206 exportable is lower than the gate drive voltage signal V of this default gate drive voltage
g.By this kind of framework, the voltage generation unit 200 that the present invention proposes can not increase under the prerequisite of circuit complexity (complexity), reaches along with environment temperature dynamic modulation gate drive voltage signal V
gobject.
Then, below for elaborating the present invention, how the picture reference voltage AVDD relevant with environment temperature is converted to the pixel drive voltage V irrelevant with environment temperature
gAMMA, please also refer to Fig. 1, Fig. 3 A and Fig. 3 B.As shown in fig. 1, pixel voltage stabilization element 300 comprises a voltage stabilizing separation circuit 302 and a pixel bleeder circuit 304.Wherein, voltage stabilizing separation circuit 302 is in order to receive this picture reference voltage AVDD relevant with environment temperature, and with after its level of spacing limiting voltage, is converted to a gamma applied voltage AVDD_0, and gamma applied voltage AVDD_0 and environment temperature irrelevant.The internal circuit schematic diagram of relevant this voltage stabilizing separation circuit 302, asks for an interview Fig. 3 A and Fig. 3 B, is respectively two kinds of enforcement aspects of the voltage stabilizing separation circuit 302 proposing according to the present invention.
First, as shown in Figure 3A, voltage stabilizing separation circuit 302 can comprise one first capacitor C 1, one second capacitor C 2, one the 3rd capacitor C 3, one first resistance R 1 and one first Zener diode D1.Wherein, the first end of the first capacitor C 1 connects picture reference voltage AVDD, the second end ground connection of the first capacitor C 1.The first end of the first resistance R 1 connects picture reference voltage AVDD, and the second end of the first resistance R 1 connects the first end of the first Zener diode D1, the second end ground connection of the first Zener diode D1.The second capacitor C 2 and the 3rd capacitor C 3 are parallel with one another, and its first end connects gamma applied voltage AVDD_0, its second end common ground jointly.Therefore, voltage stabilizing separation circuit 302 passes through the Zener voltage (Zener Voltage) of the first Zener diode D1 as the spacing voltage of picture reference voltage AVDD, makes voltage stabilizing separation circuit 302 have autoregulation.In other words, when picture reference voltage AVDD dynamically changes along with environment temperature, deviser only needs suitably to mate the resistance of the first resistance R 1, can make gamma applied voltage AVDD_0 remain unchanged (meaning do not change with environment temperature, and only relevant with the Zener voltage of the first Zener diode D1).
Similarly, Fig. 3 B implements aspect according to the another kind of the voltage stabilizing separation circuit of the embodiment of the present invention, and voltage stabilizing separation circuit 302 can comprise one the 4th capacitor C 4, one second resistance R 2, one the 3rd resistance R 3, one the 4th resistance R 4 and one second Zener diode D2.Wherein, the first end of the 4th capacitor C 4 connects picture reference voltage AVDD, the second end ground connection of the 4th capacitor C 4.The first end of the second resistance R 2 connects picture reference voltage AVDD, and the second end of the second resistance R 2 connects the first end of the second Zener diode D2, the second end ground connection of the second Zener diode D2.The first end of the 3rd resistance R 3 connects the second end of gamma applied voltage AVDD_0 and the second resistance R 2, and the second end of the 3rd resistance R 3 connects the first end of the 4th resistance R 4, and the second end ground connection of the 4th resistance R 4.By this, voltage stabilizing separation circuit 302 can pass through the Zener voltage (Zener Voltage) of the second Zener diode D2 equally as the spacing voltage of picture reference voltage AVDD, makes voltage stabilizing separation circuit 302 have autoregulation.In other words, when picture reference voltage AVDD dynamically changes along with environment temperature, deviser only needs suitably to mate the resistance of the second resistance R 2, can make gamma applied voltage AVDD_0 remain unchanged (meaning do not change with environment temperature, and only relevant with the Zener voltage of the second Zener diode D2).
Therefore, the voltage stabilizing separation circuit 302 proposing according to the present invention, can utilize the Zener voltage of Zener diode, as the spacing voltage of restriction picture reference voltage AVDD level, with when environment temperature changes, still produce the gamma applied voltage AVDD_0 noninductive with temperature.Afterwards, pixel bleeder circuit 304 can receive this gamma applied voltage AVDD_0, and is one or more pixel drive voltage V by gamma applied voltage AVDD_0 dividing potential drop
gAMMA.By this, pixel drive voltage V
gAMMAalso irrelevant with environment temperature.In one embodiment, pixel bleeder circuit 304 can be for example resistance or capacitive bleeder circuit, so that gamma applied voltage AVDD_0 is assigned on the driving voltage that in film liquid crystal display, each pixel electrode can be used further.Therefore, the pixel drive voltage V of each pixel electrode on panel
gAMMAwhen all temperature independent, film liquid crystal display is temperature influence not naturally, and still has normal color output picture.
Secondly, refer to Fig. 4, the voltage stabilizing circuit module that the present invention proposes separately can be connected to a gain circuitry 400, and gain circuitry 400 receives picture reference voltage AVDD, and picture reference voltage AVDD is amplified and is output as a upper plate reference voltage V
cOM.In simple terms, upper plate reference voltage V
cOMmainly can be used as exporting the applied voltages such as picture load on film liquid crystal display, therefore can there is certain tolerance value (tolerance) along with temperature transition.Fig. 5 A and Fig. 5 B implement aspect according to two of the gain circuitry of the embodiment of the present invention kinds, yet the embodiment of gain circuitry 400 is not limited with this two diagram.Component number or kind that the present invention does not use in limiting gain circuit 400, those skilled in the art when designed, designed optionally it, therefore do not repeat at this.Wherein, the component symbol R1 to R10 in icon represents resistance, and C1 to C4 represents electric capacity, and COM1 to COM3 represents comparer.
Then, the present invention also proposes the analysis of experimental data figure of actual emulation, as the following description.Fig. 6 A and Fig. 6 B are according to the voltage stabilizing circuit module shown in Fig. 2, respectively the experimental data figure of emulation under normal temperature and low temperature.From Fig. 6 A, if at normal temperatures, gamma applied voltage AVDD_0 is 6.8 volts (Voltage, V) and voltage-multiplying circuit 206 while having basic superposition voltage 2.5V, the control V parameter of booster circuit 204
x=8V, picture reference voltage AVDD=7.4V, and gate drive voltage signal V
g=18V.And when environment temperature decline, as shown in Figure 6B, visible gamma applied voltage AVDD_0 still remains unchanged as 6.8V, be not subject to the impact of temperature.When voltage-multiplying circuit 206 has basic superposition voltage 2.5V, the control V parameter of booster circuit 204 now
xrise to 11V, picture reference voltage AVDD=10.4V, and gate drive voltage signal V
grise to 24V.
Be with, in sum, the voltage stabilizing circuit module that the present invention proposes, not only can be by temperature sensing unit and voltage generation unit, output can, along with the dynamic gate drive voltage of adjusting of environment temperature, also can be exported pixel drive voltage not influenced by ambient temperature by pixel voltage stabilization element simultaneously.By this, when the voltage stabilizing circuit module of the present invention's proposition is applied in film liquid crystal display, liquid crystal panel still can normally start at low temperatures.And, to consider under temperature effect, voltage stabilizing circuit module can be exported the gate drive voltage relevant with temperature simultaneously, and temperature independent pixel drive voltage, to take into account film liquid crystal display in power consumption and the balance of exporting on normal color.
Although the present invention discloses as above with aforesaid preferred embodiment; so it is not in order to limit the present invention; any those skilled in the art; within not departing from spirit of the present invention and scope; when doing a little change and retouching, therefore scope of patent protection of the present invention must be as the criterion depending on the appended claim scope person of defining of this instructions.
Claims (7)
1. a voltage stabilizing circuit module with temperature compensation, comprising:
Temperature sensing unit, according to environment temperature output temperature signal;
Voltage generation unit, according to this temperature signal, exports corresponding gate drive voltage and picture reference voltage; And
Pixel voltage stabilization element, receives this picture reference voltage, after the level of this pixel voltage stabilization element according to this picture reference voltage of spacing limiting voltage, exports at least one pixel drive voltage,
Wherein this pixel drive voltage and environment temperature are irrelevant,
Wherein this pixel voltage stabilization element comprises:
Voltage stabilizing separation circuit, receives this picture reference voltage, and with after this spacing voltage pressure limiting, output gamma applied voltage; And
Pixel bleeder circuit, receives this gamma applied voltage, and is this pixel drive voltage by this gamma applied voltage dividing potential drop,
Wherein this voltage generation unit comprises:
Power chip, according to this temperature signal, parameter is controlled in output;
Booster circuit, controls parameter, output switching voltage signal according to this; And
Voltage-multiplying circuit, receives this switched voltage signal, and this voltage-multiplying circuit carries out voltage charging according to this switched voltage signal, to export this gate drive voltage.
2. the voltage stabilizing circuit module with temperature compensation according to claim 1, wherein this gamma applied voltage and this environment temperature are irrelevant.
3. the voltage stabilizing circuit module with temperature compensation according to claim 1, wherein this voltage stabilizing separation circuit comprises:
The first electric capacity, the first end of this first electric capacity connects this picture reference voltage, the second end ground connection of this first electric capacity;
The first resistance, the first end of this first resistance connects this picture reference voltage, and the second end of this first resistance connects this gamma applied voltage;
The first Zener diode, the first end of this first Zener diode connects the second end of this first resistance, the second end ground connection of this first Zener diode;
The second electric capacity, the first end of this second electric capacity connects the second end of this first resistance, the second end ground connection of this second electric capacity; And
The 3rd electric capacity, the first end of the 3rd electric capacity connects the second end of this first resistance, the second end ground connection of the 3rd electric capacity.
4. the voltage stabilizing circuit module with temperature compensation according to claim 1, wherein this voltage stabilizing separation circuit comprises:
The 4th electric capacity, the first end of the 4th electric capacity connects this picture reference voltage, the second end ground connection of the 4th electric capacity;
The second resistance, the first end of this second resistance connects this picture reference voltage, and the second end of this second resistance connects this gamma applied voltage;
The second Zener diode, the first end of this second Zener diode connects the second end of this second resistance, the second end ground connection of this second Zener diode;
The 3rd resistance, the first end of the 3rd resistance connects the second end of this second resistance; And
The 4th resistance, the first end of the 4th resistance connects the second end of the 3rd resistance, the second end ground connection of the 4th resistance.
5. the voltage stabilizing circuit module with temperature compensation according to claim 1, also comprises gain circuitry, and this gain circuitry receives this picture reference voltage, so that this picture reference voltage is amplified and is output as upper plate reference voltage.
6. the voltage stabilizing circuit module with temperature compensation according to claim 1, when wherein this environment temperature is preset temperature, this gate drive voltage of this voltage generation unit output is default gate drive voltage, when this environment temperature is during lower than this preset temperature, this voltage generation unit output is higher than this gate drive voltage signal of this default gate drive voltage.
7. the voltage stabilizing circuit module with temperature compensation according to claim 1, when wherein this environment temperature is preset temperature, this gate drive voltage of this voltage generation unit output is default gate drive voltage, when this environment temperature is during higher than this preset temperature, this voltage generation unit output is lower than this gate drive voltage signal of this default gate drive voltage.
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| TW100111132A TWI549430B (en) | 2011-03-30 | 2011-03-30 | Constant voltage regulator with temperature compensation |
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| CN104280911B (en) | 2014-09-26 | 2017-04-05 | 京东方科技集团股份有限公司 | A kind of array base palte, display panels and display device |
| CN107195273A (en) * | 2016-03-14 | 2017-09-22 | 上海和辉光电有限公司 | A kind of OLED display device and the method for improving display device display performance |
| CN106531100B (en) * | 2016-12-15 | 2019-04-02 | 昆山龙腾光电有限公司 | Display device and driving method |
| CN107610662B (en) * | 2017-09-22 | 2019-11-05 | 南京熊猫电子制造有限公司 | A kind of liquid crystal display |
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2011
- 2011-03-30 TW TW100111132A patent/TWI549430B/en not_active IP Right Cessation
- 2011-05-31 CN CN201110144231.6A patent/CN102222485B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1912695A (en) * | 2005-08-09 | 2007-02-14 | 三星电子株式会社 | Voltage converting unit and display device having the same |
| CN101105923A (en) * | 2006-07-13 | 2008-01-16 | 三星电子株式会社 | Voltage generator for the gate driver, driving device and display apparatus comprising the same |
| CN200972758Y (en) * | 2006-09-29 | 2007-11-07 | 天津光电新亚电子通信技术有限公司 | Testing device for LCD screen |
| CN101221730A (en) * | 2006-11-28 | 2008-07-16 | 三星电子株式会社 | Liquid crystal display |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI549430B (en) | 2016-09-11 |
| TW201240346A (en) | 2012-10-01 |
| CN102222485A (en) | 2011-10-19 |
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