CN104932130B - Liquid crystal display device - Google Patents
Liquid crystal display device Download PDFInfo
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- CN104932130B CN104932130B CN201510324661.4A CN201510324661A CN104932130B CN 104932130 B CN104932130 B CN 104932130B CN 201510324661 A CN201510324661 A CN 201510324661A CN 104932130 B CN104932130 B CN 104932130B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 67
- 239000000758 substrate Substances 0.000 claims abstract description 88
- 230000003287 optical effect Effects 0.000 claims abstract description 19
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 239000011159 matrix material Substances 0.000 claims description 9
- 238000002161 passivation Methods 0.000 claims description 6
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 239000012212 insulator Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical group N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 3
- 230000017105 transposition Effects 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 2
- 210000005069 ears Anatomy 0.000 claims 1
- 239000011521 glass Substances 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 5
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005282 brightening Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000012780 transparent material Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- RHZWSUVWRRXEJF-UHFFFAOYSA-N indium tin Chemical compound [In].[Sn] RHZWSUVWRRXEJF-UHFFFAOYSA-N 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- MRNHPUHPBOKKQT-UHFFFAOYSA-N indium;tin;hydrate Chemical compound O.[In].[Sn] MRNHPUHPBOKKQT-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136286—Wiring, e.g. gate line, drain line
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Geometry (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a kind of liquid crystal display device, the liquid crystal display device includes：Colored optical filtering substrates that array substrate and array substrate are oppositely arranged, are set to LED backlight and power supply circuit of the array substrate far from colored optical filtering substrates side at the liquid crystal layer being interposed between array substrate and colored optical filtering substrates, array substrate includes multi-strip scanning line, insulating layer, data line, pixel electrode and public electrode；Public electrode includes first area and second area, and first area is close to LED backlight, and second area is far from LED backlight；Power supply circuit, the first common voltage is provided for the first area to array substrate, provides the second common voltage to the second area of array substrate, and the first common voltage is more than the second common voltage.The present invention can improve the display quality of liquid crystal display device.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of liquid crystal display device.
Background technology
Liquid crystal display device (Liquid Crystal Display, LCD) has good, small, light-weight, the low drive of image quality
Dynamic voltage, low-power consumption, radiationless and relatively low manufacturing cost advantage, occupy an leading position in flat display field at present.Its
Be widely used in desktop computer, palmtop computer, personal digital assistant (Personal Digital Assistant,
PDA), in a variety of office automations such as portable phone, TV box and audio-visual equipment.
Fig. 1 is the cross-sectional view of existing liquid crystal display device.As shown in Figure 1, existing liquid crystal display device
10 include backlight module 3 and liquid crystal display panel 4, and backlight module 3 includes front frame 5, backboard 6, glue frame 7, backlight 15, and under
The supreme reflector plate 120 stacked successively, light guide plate 126 and optical diaphragm group 127, optical diaphragm group 127 include prismatic lens, diffusion
Piece, brightening piece etc..Fig. 2 is the part section structural representation of existing liquid crystal display panel, as shown in Fig. 2, LCD display
Plate 4 includes array substrate 11, colored optical filtering substrates 12, the liquid crystal layer being folded between array substrate 11 and colored optical filtering substrates 12
13.Array substrate 11 is including substrate 101 and is successively set on scanning of the substrate 101 in face of the surface of 12 side of colored optical filtering substrates
Line (not shown), pixel electrode 143 and the second public electrode 134.In general, the LED backlight 15 in backlight module is general
It is all disposed within the side of optical diaphragm group 127, the region of the close backlight 15 of array substrate 11 is first area 115, array
The region of the separate backlight 15 of substrate 11 is second area 116, additionally, due to poor, the LED backlight of liquid crystal display device heat dissipation
Temperature near source 15 is higher than other regions, i.e., in 115 range of first area of the array substrate 11 of LED backlight 15
Temperature is higher than the temperature in 116 range of second area of the array substrate 11 far from LED backlight 15.Near LED backlight 15
When temperature is about 45 DEG C, other regional temperatures are about 25 DEG C.At 25 DEG C, liquid crystal molecules parallel selected by liquid crystal layer 13 in it is vertical
Permittivity ε in long axis of liquid crystal molecule direction is 3.77 and 7.3 respectively, and at 45 DEG C, selected liquid crystal molecules parallel in
Permittivity ε perpendicular to long axis of liquid crystal molecule direction is 3.8 and 6.7 respectively.And temperature is different in array substrate 11 first
Region 115 and second area 116, the difference of the permittivity ε of liquid crystal molecule can cause the difference of the liquid crystal capacitance of pixel, in turn
The drop-out value Δ Vp values of 143 voltage of pixel electrode are different, 116 face of first area 115 and second area when scan line is closed
The common voltage that pixel needs also differs.Wherein, the drop-out value of 143 voltage of pixel electrode and first area when scan line is closed
The relationship of difference is between 115 and the common voltage of second area 116：Δ Vcom=Δs (Δ Vp), ε ≈ (ε 1+ ε 2)/2；Clc
∞ε；Δ Vp=Cgs* (Vgh-Vgl)/(Cgs+Clc+Cst)；Wherein, Δ Vcom is first area 115 and second area 116
Difference between common voltage, Δ Vp are the drop-out value of 143 voltage of pixel electrode when scan line is closed, and ε 1, ε 2 are liquid crystal point respectively
Son parallel and perpendicular to long axis of liquid crystal molecule direction dielectric constant, ε be liquid crystal molecule average dielectric constant, Cgs, Clc,
Cst is capacitance, liquid crystal capacitance and the storage capacitance between scan line and thin film transistor (TFT) drain electrode respectively, and Vgh, Vgl are swept respectively
The minimum and maximum voltage value provided on line is retouched, from above-mentioned formula as can be seen that the firstth different area of temperature in array substrate 11
The difference of domain 115 and second area 116, the permittivity ε of liquid crystal molecule causes the liquid crystal capacitance difference of pixel, and then scan line
The drop-out value Δ Vp values of 143 voltage of pixel electrode are different when closing, to the picture of 116 face of first area 115 and second area
The required common voltage of element also differs.And the first area 115 of usual second public electrode 134 and second area 116 are only
A kind of common voltage is provided, therefore when the common voltage provided to 15 side second area 116 of separate LED backlight is optimum value
When, then the common voltage provided to the first area 115 of 15 side of the higher close LED backlight of temperature can deviate from most preferably
Value.And the common voltage off-target common voltage actually provided can cause DC offset voltage, to which liquid crystal display can be caused
The generation of 115 image retention of device first area so that liquid crystal display device occurs showing bad phenomenon.
Invention content
The present invention provides a kind of liquid crystal display device, solves above-mentioned liquid crystal display device and the problems such as image retention occurs.
The technical solution is as follows：
An embodiment of the present invention provides a kind of liquid crystal display device, the liquid crystal display device, including：Array substrate, with
Colored optical filtering substrates that array substrate is oppositely arranged, the liquid crystal layer being interposed between array substrate and colored optical filtering substrates, setting
In LED backlight and power supply circuit of the array substrate far from colored optical filtering substrates side, array substrate includes multi-strip scanning line,
It is covered in the insulating layer on scan line surface, is arranged in surface of insulating layer and the data line that is arranged with scan line transposition insulator, setting
In surface of insulating layer and in the pixel electrode of matrix distribution, it is covered in the passivation layer of pixel electrode surface and data line surface, is covered
Cover the public electrode in passivation layer surface；Public electrode includes first area and second area, and first area and LED backlight are just
To setting, second area is far from LED backlight；Power supply circuit provides the first common electrical for the first area to array substrate
Pressure provides the second common voltage to the second area of array substrate, and the first common voltage is more than the second common voltage.
In one embodiment of the invention, which includes the first feeder ear, the second feeder ear, third power supply
End, the 4th feeder ear, first resistor, second resistance, 3rd resistor, the 4th resistance, first feeder ear and second feeder ear
The tertiary voltage input terminal and the 4th voltage input end of the array substrate second area is electrically connected, the third feeder ear is logical
Cross the first voltage input terminal that 3rd resistor is electrically connected the array substrate first area, the first of the array substrate first area
Voltage input end is also electrically connected one end of the 4th resistance, the other end ground connection of the 4th resistance, and the 4th feeder ear passes through
The first resistor is electrically connected the second voltage input terminal of the array substrate first area, and the second of the array substrate first area
Voltage input end is also electrically connected one end of the second resistance, the other end ground connection of the second resistance.
In one embodiment of the invention, the first common voltage, should between -0.843 volt to -0.837 volt
Second common voltage is between -0.783 volt to -0.777 volt.
In one embodiment of the invention, the first feeder ear, the second feeder ear, third feeder ear, the 4th feeder ear carry
The voltage of confession is between -0.843 volt to -0.837 volt.
In one embodiment of the invention, the material of insulating layer is silicon nitride.
In one embodiment of the invention, public electrode and pixel electrode are electrically conducting transparent material.
In one embodiment of the invention, second area also has the 5th voltage input end and the 6th voltage input end,
Power supply circuit further includes the 5th feeder ear and the 6th feeder ear, and array base is electrically connected in the 5th feeder ear and the 6th feeder ear
5th voltage input end of plate second area and the 6th voltage input end.
In one embodiment of the invention, the voltage that the 5th feeder ear, the 6th feeder ear provide is between -0.843 volt
Between to -0.837 volt.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：
Public electrode region in array substrate is divided into first area and according to the difference of backlight source position
Two regions, first area is close to LED backlight, and second area is far from LED backlight；And by power supply circuit to array substrate
First area provides the first common voltage, and the second common voltage, and the first common voltage are provided to the second area of array substrate
More than the second common voltage, carried on the back far from LED when the temperature within the scope of the first area of the array substrate of LED backlight is higher than
When temperature within the scope of the second area of the array substrate of light source, this makes it possible to ensure to the far from LED backlight side
Second common voltage of two regions offer and the first common voltage provided to the first area close to LED backlight side are
Optimum value will not so cause DC offset voltage, so as to avoid the generation of liquid crystal display device image retention, improve liquid crystal
The display quality of showing device.
Above description is only the general introduction of technical solution of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, and in order to allow the above and other objects, features and advantages of the present invention can
It is clearer and more comprehensible, it is special below to lift preferred embodiment, and coordinate attached drawing, detailed description are as follows.
Description of the drawings
Fig. 1 is the part section structural representation of existing liquid crystal display device；
Fig. 2 is the part section structural representation of existing liquid crystal display panel；
Fig. 3 is the part section structural representation of the liquid crystal display device of first embodiment of the invention；
Fig. 4 is the liquid crystal display panel part section structural representation of first embodiment of the invention；
Fig. 5 is the physical circuit figure of the power supply circuit of the liquid crystal display device of Fig. 3；
Fig. 6 is the physical circuit figure of the power supply circuit for the liquid crystal display device that second embodiment of the invention provides.
Specific implementation mode
It is of the invention to reach the technological means and effect that predetermined goal of the invention is taken further to illustrate, below in conjunction with
Attached drawing and preferred embodiment, to the liquid crystal display device that proposes according to the present invention and preparation method thereof its specific implementation mode, knot
Structure, feature and effect are described in detail as after.
For the present invention aforementioned and other technology contents, feature and effect, in following cooperation with reference to the preferable reality of schema
Applying during example is described in detail clearly to be presented.By the explanation of specific implementation mode, when predetermined mesh can be reached to the present invention
The technological means taken and effect be able to more deeply and it is specific understand, however institute's accompanying drawings are only to provide with reference to and say
It is bright to be used, it is not intended to limit the present invention.
First embodiment
Fig. 3 is the part section structural representation of the liquid crystal display device of first embodiment of the invention, as shown in figure 3, should
Liquid crystal display device includes backlight module 30 and display panel 40, and backlight module 30 includes front frame 25, backboard 26, glue frame 27, the back of the body
Light source 215, and the reflector plate 220, light guide plate 226 and the optical diaphragm group 227 that stack successively from bottom to up, optical diaphragm group 227
Including prismatic lens, diffusion sheet, brightening piece etc..
Fig. 4 is the liquid crystal display panel part section structural representation of first embodiment of the invention, referring to FIG. 4, this reality
The liquid crystal display panel 40 for applying example includes：Array substrate 301, the colored optical filtering substrates 303 being oppositely arranged with array substrate 301,
It is interposed in the liquid crystal layer 305 between array substrate 301 and colored optical filtering substrates 303, is set to array substrate 301 far from colored filter
The LED backlight module 306 and power supply circuit 401 of 303 side of photopolymer substrate.
Wherein, colored filter substrate 303 includes substrate of glass 311, the black matrix on 311 surface of substrate of glass is arranged
312, setting substrate of glass 311 and with 312 spaced color blocking layer 313 of black matrix, be covered in color blocking layer 313 and black matrix
First public electrode 316 on 312 surfaces and the flatness layer (Over Coat) 318 for being covered in 316 surface of the first public electrode, that is,
First public electrode 316 is disposed on the side of the separate liquid crystal layer of flatness layer 318, and specifically, which sets
It is placed among color blocking layer 313 and flatness layer 318, however, it is not limited to this, in other embodiments, first public electrode 316
It can also be set between first substrate of glass 311 and black matrix 312 and color blocking layer 313, in addition, first public electrode
316 can also be set between color blocking layer 313 and black matrix 312 and the first substrate of glass 311.Black matrix 312 can be by resin
Material is formed, and flatness layer 318 can be formed by organic insulating material.First public electrode 316 is electrically conducting transparent material, such as is aoxidized
Indium tin etc...
Array substrate 301 (is not shown including substrate of glass 330, the multi-strip scanning line being arranged on 330 surface of substrate of glass in figure
Go out), the insulating layer 341 that is covered in scan line surface, be arranged in 341 surface of insulating layer and the number that is arranged with scan line transposition insulator
According to line 345, be arranged 341 surface of insulating layer and in matrix distribution pixel electrode 343, be covered in 343 surface of pixel electrode and
The passivation layer 336 on 345 surface of data line, the second public electrode 334 for being covered in 336 surface of passivation layer.In the present embodiment, as
Plain electrode 343 and the second public electrode 334 are transparent conductive material, such as tin indium oxide (Indium Tin Oxide, ITO)
Deng.Insulating layer 341 can be formed by inorganic insulating material, such as silicon nitride etc..Second public electrode 334 of array substrate 301 wraps
First area 361 and second area 363 are included, first area 361 is arranged close to LED backlight 307, i.e. LED backlight 307 in battle array
Within the scope of 361 side of close first area of row substrate 301.Second area 363 is far from LED backlight 307.
Fig. 5 is the physical circuit figure of the power supply circuit of the liquid crystal display device of Fig. 3.Referring to FIG. 5, power supply circuit 401, is used
The first common voltage is provided in the first area 361 to array substrate 301, the is provided to the second area 363 of array substrate 301
Two common voltages, and the first common voltage is more than the second common voltage.First area 361 has first voltage input terminal e and the
Two voltage input end f.And second area 363 has tertiary voltage input terminal c and the 4th voltage input end d.
Further, in this embodiment power supply circuit 401 includes the first feeder ear V3, the second feeder ear V4, third power supply
V5, the 4th feeder ear V6, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4 are held, specifically, the first power supply
The electricity of tertiary voltage input terminal c and the 4th of 301 second area 361 of array substrate is electrically connected in end V3 and the second feeder ear V4
Input terminal d, third feeder ear V5 is pressed to be electrically connected the first voltage of 301 first area 361 of array substrate by 3rd resistor R3
The first voltage input terminal e of input terminal e, 301 first area 361 of array substrate are also electrically connected one end of the 4th resistance R4, the
The other end of four resistance R4 is grounded, and the 4th feeder ear V6 is electrically connected array substrate first area 361 by first resistor R1
The second voltage input terminal f of second voltage input terminal f, array substrate first area 361 are also electrically connected the one of second resistance R2
End, the other end ground connection of second resistance R2.
In the present embodiment, the first feeder ear V3, the second feeder ear V4, third feeder ear V5, the 4th feeder ear V6 are provided
Voltage is between -0.843 volt to -0.837 volt, preferably -0.84 volt, then first resistor R1,3rd resistor R3
Resistance value is preferably 1 ohm, second resistance R2, the 4th resistance R4 resistance value be preferably 13 ohm.In this way, far from LED backlight 307
Voltage between the tertiary voltage input terminal c and the 4th voltage input end d of the second area 363 of side is between -0.843 volt
Between to -0.837 volt, preferably -0.84 volt, i.e., to the second common voltage of the offer of second area 363 between -0.843
Volt is between -0.837 volt, preferably -0.84 volt.First close to the first area 361 of 307 side of LED backlight
Voltage between voltage input end e and second voltage input terminal f between -0.783 volt to -0.777 volt, preferably -
0.78 volt, i.e., to the first common voltage of the offer of first area 361 between -0.783 volt to -0.777 volt, preferably
It is -0.78 volt.When the temperature in 361 range of first area close to the array substrate 301 of LED backlight 307 is higher than separate
When temperature in 363 range of second area of the array substrate 301 of LED backlight 307, by the second public electrode 334
First area 361 and second area 363 provide required best common voltage, and this makes it possible to ensure to far from LED backlight
The second common voltage and carried to the first area 361 close to 307 side of LED backlight that the second area 363 of 307 sides provides
The first common voltage supplied is optimum value, will not so cause DC offset voltage, so as to avoid liquid crystal display device the
The generation of one region, 361 image retention, improves the display quality of liquid crystal display device.In other embodiments of the present invention, first to
The resistance value of 4th resistance R1, R2, R3, R4 and the first feeder ear V3, the second feeder ear V4, third feeder ear V5, the 4th feeder ear
The voltage that V6 is provided can also be accordingly arranged according to the common voltage difference needed for array substrate 301, as long as it can be protected
It demonstrate,proves to the second common voltage of the offer of second area 363 far from 307 side of LED backlight and to close to LED backlight 307 1
The first common voltage that the first area 361 of side provides is optimum value.
In conclusion liquid crystal display device provided in this embodiment, by battle array by the difference according to 307 position of backlight
334 region of public electrode is divided into first area 361 and second area 363 on row substrate 301, and first area 361 is close
LED backlight, second area 363 is far from LED backlight 307；And the firstth area of array substrate 301 is given by power supply circuit 401
Domain 361 provides the first common voltage, and the second common voltage, and the first common electrical are provided to the second area 363 of array substrate 301
Pressure is more than the second common voltage, when the temperature in 361 range of first area close to the array substrate 301 of LED backlight 307 is high
When temperature in 363 range of second area of the array substrate 301 far from LED backlight 307, this makes it possible to ensure to remote
The second common voltage that second area 363 from 307 side of LED backlight provides and to close to the of 307 side of LED backlight
The first common voltage that one region 361 provides is optimum value, will not so cause DC offset voltage, so as to avoid liquid crystal
The generation of display device image retention improves the display quality of liquid crystal display device.
Second embodiment
Fig. 6 is the physical circuit figure of the power supply circuit for the liquid crystal display device that second embodiment of the invention provides.It please refers to
Fig. 6, unlike Fig. 5, second area 363 also has the 5th voltage input end a and the 6th voltage input end b, power supply circuit
401 further include the 5th feeder ear V1 and the 6th feeder ear V2, wherein the 5th feeder ear V1 and the 6th feeder ear V2 electrically connect respectively
Meet the 5th voltage input end a and the 6th voltage input end b of 301 second area 363 of array substrate.In the present embodiment, the 5th supplies
The voltage that electric end V1 and the 6th feeder ear V2 are provided is between -0.843 volt to -0.837 volt, preferably -0.84 volt.
In this way, also passing through the 5th voltage input end a and the 6th control source to the second area 363 far from 307 side of LED backlight
It holds the voltage between b between -0.843 volt to -0.837 volt, preferably -0.84 volt, that is, is further ensured that the
The second common voltage that two regions 363 provide is between -0.843 volt to -0.837 volt, preferably -0.84 volt, this
The 5th feeder ear V1 and the 6th feeder ear V2 in embodiment can make near the 5th voltage input end a and the 6th voltage input end b
The first common voltage more stablize.In other embodiments of the present invention, the 5th feeder ear V1 and the 6th feeder ear V2 is provided
Voltage can also be accordingly arranged according to the common voltage difference needed for array substrate 301, as long as it can guarantee the 5th confession
The second common voltage that electric end V1 and the 6th feeder ear V2 gives the second area 363 far from 307 side of LED backlight to provide is most
Good value.
In conclusion liquid crystal display device provided in this embodiment, also passes through the 5th feeder ear V1 and the 6th feeder ear V2
It is electrically connected the 5th voltage input end a and the 6th voltage input end b of 301 second area 363 of array substrate so that far from LED
Voltage between the 5th voltage input end a and the 6th voltage input end b of the second area 363 of 307 side of backlight is best
Value can make the near the 5th voltage input end a and the 6th voltage input end b to the 5th feeder ear V1 and the 6th feeder ear V2
One common voltage keeps more stablizing, it is ensured that the display quality of liquid crystal display device.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
For the equivalent embodiment of equivalent variations, as long as be without departing from technical solution of the present invention content, it is right according to the technical essence of the invention
Any simple modification, equivalent change and modification made by above example, belong in the range of technical solution of the present invention.
Claims (7)
1. a kind of liquid crystal display device, including：It is array substrate, the colored optical filtering substrates being oppositely arranged with the array substrate, sandwiched
Liquid crystal layer between the array substrate and the colored optical filtering substrates is set to the array substrate far from the colored optical filtering substrates one
The LED backlight and power supply circuit of side,
The array substrate includes multi-strip scanning line, is covered in the insulating layer on the scan line surface, setting in the surface of insulating layer and
With the data line of scan line transposition insulator setting, it is arranged in the surface of insulating layer and in the pixel electrode of matrix distribution, covering
In the passivation layer of the pixel electrode surface and the data line surface, it is covered in the public electrode of the passivation layer surface；The common electrical
Pole includes first area and second area, and the first area is close to the LED backlight, and the second area is far from the LED backlight；
Power supply circuit provides the second common voltage for providing the first common voltage to the first area to the second area, and
First common voltage is more than second common voltage；
Wherein, the power supply circuit include the first feeder ear, the second feeder ear, third feeder ear, the 4th feeder ear, first resistor,
The second area is electrically connected in second resistance, 3rd resistor, the 4th resistance, first feeder ear and second feeder ear
Tertiary voltage input terminal and the 4th voltage input end, the third feeder ear are electrically connected the of the first area by 3rd resistor
One voltage input end, the first voltage input terminal of the first area are also electrically connected one end of the 4th resistance, the 4th resistance
Other end ground connection, the 4th feeder ear is electrically connected the second voltage input terminal of the first area by the first resistor, should
The second voltage input terminal of first area is also electrically connected one end of the second resistance, the other end ground connection of the second resistance.
2. liquid crystal display device according to claim 1, which is characterized in that first common voltage is between -0.843 volt
Between to -0.837 volt, second common voltage is between -0.783 volt to -0.777 volt.
3. liquid crystal display device according to claim 2, which is characterized in that first feeder ear, the second feeder ear, third
The voltage that feeder ear, the 4th feeder ear provide is between -0.843 volt to -0.837 volt.
4. liquid crystal display device according to claim 1, which is characterized in that the material of the insulating layer is silicon nitride.
5. liquid crystal display device according to claim 1, which is characterized in that the public electrode and the pixel electrode are transparent
Conductive material.
6. liquid crystal display device according to claim 1, which is characterized in that the second area also has the 5th control source
End and the 6th voltage input end, the power supply circuit further include the 5th feeder ear and the 6th feeder ear, the 5th feeder ear and this
The 5th voltage input end and the 6th voltage input end of the second area is electrically connected in six feeder ears.
7. liquid crystal display device according to claim 6, which is characterized in that the 5th feeder ear, the 6th feeder ear provide
Voltage between -0.843 volt to -0.837 volt.
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| CN1652001A (en) * | 2004-02-04 | 2005-08-10 | 京东方显示器科技公司 | Liquid crystal display |
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| CN101542581A (en) * | 2006-12-01 | 2009-09-23 | Nec显示器解决方案株式会社 | Liquid crystal display apparatus and liquid crystal panel driving method |
| CN104216178A (en) * | 2014-09-09 | 2014-12-17 | 京东方科技集团股份有限公司 | Array substrate and liquid crystal display device |
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| JP2000035564A (en) * | 1998-07-17 | 2000-02-02 | Maspro Denkoh Corp | Brightness correction device of liquid crystal display |
| JP2005003898A (en) * | 2003-06-11 | 2005-01-06 | Funai Electric Co Ltd | Liquid crystal module, backlight control device, and method for controlling backlight |
| CN1652001A (en) * | 2004-02-04 | 2005-08-10 | 京东方显示器科技公司 | Liquid crystal display |
| CN1655031A (en) * | 2004-02-13 | 2005-08-17 | 三星电子株式会社 | Planar light source device and liquid crystal display apparatus having the same |
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Address after: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Patentee after: InfoVision Optoelectronics(Kunshan)Co.,Ltd. Address before: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Patentee before: INFOVISION OPTOELECTRONICS (KUNSHAN) Co.,Ltd. |