CN107340562A - Light guide plate and liquid crystal display - Google Patents
Light guide plate and liquid crystal display Download PDFInfo
- Publication number
- CN107340562A CN107340562A CN201710725800.3A CN201710725800A CN107340562A CN 107340562 A CN107340562 A CN 107340562A CN 201710725800 A CN201710725800 A CN 201710725800A CN 107340562 A CN107340562 A CN 107340562A
- Authority
- CN
- China
- Prior art keywords
- lead electrode
- liquid crystal
- light guide
- guide plate
- shank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0041—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided in the bulk of the light guide
-
- 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
- G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
-
- 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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
Abstract
The present invention provides a kind of light guide plate and liquid crystal display.The light guide plate lays the first lead electrode (13) on light conducting plate body (11) upper surface, and second lead electrode (15) relative with first lead electrode (13), first lead electrode (13) forms electric capacity (C) with the second lead electrode (15), electric current is produced by applying AC signal to first lead electrode (13) and the second lead electrode (15), so that first lead electrode (13) is generated heat with the second lead electrode (15), so light guide plate is integrated with heating function, the light guide plate is applied to liquid crystal display, liquid crystal panel can be heated on the basis of liquid crystal panel display image quality is not influenceed, make liquid crystal panel normal work at low ambient temperatures, and cost is relatively low.
Description
Technical field
The present invention relates to technical field of liquid crystal display, more particularly to a kind of light guide plate and liquid crystal display.
Background technology
Liquid crystal display (Liquid Crystal Display, LCD), have thin fuselage, power saving, radiationless etc. numerous excellent
Point, obtain widely applying, such as:LCD TV, smart mobile phone, digital camera, tablet personal computer, computer screen or notes
This computer screen etc., occupies an leading position in flat display field.
Liquid crystal display on existing market is largely backlight liquid crystal display, including housing, in housing
Liquid crystal panel and the backlight module (Backlight Module) in housing.
The structure of liquid crystal panel is by a colored filter substrate (Color Filter, CF), a thin film transistor (TFT) array
Substrate (Thin Film Transistor Array Substrate, TFT Array Substrate) and one it is configured at two
Liquid crystal layer (Liquid Crystal Layer) between substrate is formed, and its operation principle is by being applied on two panels glass substrate
Add driving voltage to control the rotation of the liquid crystal molecule of liquid crystal layer, the light of backlight module is reflected into generation picture.
Backlight module is divided into two kinds of side entrance back module and down straight aphototropism mode set according to the difference of light source incidence position.
Down straight aphototropism mode set be by illuminating source such as cathode-luminescence fluorescent tube (Cold Cathode Fluorescent Lamp,
CCFL) or light emitting diode (Light Emitting Diode, LED) is arranged on liquid crystal panel rear, directly forms area source
It is supplied to liquid crystal panel;And side entrance back module is that backlight LED lamp bar (Light Bar) is located at into liquid crystal panel side rear
Back plate edges at, light that LED light bar is sent enters from the incidence surface of light guide plate (Light Guide Plate, LGP) side
Light guide plate, projected after reflection and diffusion from light guide plate exiting surface, then via optical diaphragm group, liquid is supplied to form area source
Crystal panel.
Generally, the liquid crystal display used in office space, because environment temperature is substantially stationary, liquid can be met
The temperature requirement (- 20 DEG C~70 DEG C) of crystal display normal work.But used in some industry control industries and other particular places
Liquid crystal display, moved because more a wide range of earthwave can occur for environment temperature, it is possible to do not reach the normal work of liquid crystal display
The temperature requirement of work, such as less than -20 DEG C, cause liquid crystal display cisco unity malfunction because liquid crystal material only -
20 DEG C~70 DEG C of temperature range can just show liquid crystal state, if less than -20 DEG C, liquid crystal state will disappear, and cause liquid crystal
Show device cisco unity malfunction.
To solve the above problems, as shown in figure 1, existing liquid crystal display can be in backlight module 100 and liquid crystal panel 200
Between increase by one layer of heating film 300, for doing temperature-compensating to liquid crystal panel 200 at low temperatures, enable liquid crystal panel
Normal work;Wherein, the backlight module 100 include be cascading from bottom to top bottom reflector plate 101, light guide plate 102,
And optical diaphragm group 103.Although the function of temperature of the heating film 300 with compensation liquid crystal panel 200, cost is higher,
And display image quality can be had a certain impact.
The content of the invention
It is an object of the invention to provide a kind of light guide plate, the light guide plate is integrated with the work(heated to liquid crystal panel
Can, can make liquid crystal panel normal work at low ambient temperatures on the basis of liquid crystal panel display image quality is not influenceed, cost compared with
It is low.
Another object of the present invention is to provide a kind of liquid crystal display, the light guide plate in it is integrated with to be entered to liquid crystal panel
The function of row heating, liquid crystal panel can normal work at low ambient temperatures, image quality is unaffected, whole liquid crystal display into
This is relatively low.
To achieve the above object, present invention firstly provides a kind of light guide plate, including light conducting plate body, it is laid on the leaded light
The first lead electrode on plate body upper surface and it is laid on the light conducting plate body upper surface and first lead electrode
The second relative lead electrode;
First lead electrode and the second lead electrode form electric capacity, by being led to first lead electrode with second
Line electrode applies AC signal and produces electric current so that the first lead electrode and the second lead electrode heating.
First lead electrode and the second lead electrode are in comb shape.
First lead electrode includes several first comb portions of the first shank described in the first shank and vertical connection,
Second lead electrode includes several second comb portions of the second shank described in the second shank and vertical connection;
First shank is oppositely arranged with the second shank, and several first comb portions and several second comb portions are mutual
It is staggered.
The material of first lead electrode and the second lead electrode is one kind in copper, chromium, molybdenum.
Multiple scattering particles are provided with the light conducting plate body.
The present invention also provides a kind of liquid crystal display, including backlight module and the liquid crystal surface that is located on the backlight module
Plate;
The backlight module includes light guide plate, diffusion sheet and the prismatic lens stacked gradually from bottom to top;
The light guide plate include light conducting plate body, be laid on the light conducting plate body upper surface the first lead electrode,
And it is laid on the second lead electrode relative with first lead electrode on the light conducting plate body upper surface;
First lead electrode and the second lead electrode form electric capacity, by being led to first lead electrode with second
Line electrode applies AC signal and produces electric current so that the first lead electrode and the second lead electrode heating, with to the liquid
Crystal panel is heated.
First lead electrode and the second lead electrode are in comb shape.
The backlight module also includes being located at the reflector plate below the light guide plate;It is provided with the light conducting plate body multiple
Scattering particles.
First lead electrode includes several first comb portions of the first shank described in the first shank and vertical connection,
Second lead electrode includes several second comb portions of the second shank described in the second shank and vertical connection;
First shank is oppositely arranged with the second shank, and several first comb portions and several second comb portions are mutual
It is staggered.
The material of first lead electrode and the second lead electrode is one kind in copper, chromium, molybdenum.
Beneficial effects of the present invention:Light guide plate provided by the invention, the first wire is laid on light conducting plate body upper surface
Electrode and second lead electrode relative with first lead electrode, first lead electrode and the second lead electrode shape
Into electric capacity, electric current is produced by applying AC signal to first lead electrode and the second lead electrode so that described first
Lead electrode and the second lead electrode are generated heat, so the light guide plate of the present invention is integrated with heating function, the light guide plate is applied to
Liquid crystal display, liquid crystal panel can be heated on the basis of liquid crystal panel display image quality is not influenceed, make liquid crystal panel low
Normal work under warm environment, and cost is relatively low.Liquid crystal display provided by the invention, leading for heating function is integrated with using above-mentioned
Tabula rasa, liquid crystal panel is heated by the light guide plate, liquid crystal panel normal work at low ambient temperatures, image quality can be made
It is unaffected, and the cost of whole liquid crystal display is relatively low.
Brief description of the drawings
In order to be further understood that the feature of the present invention and technology contents, refer to below in connection with the detailed of the present invention
Illustrate and accompanying drawing, however accompanying drawing only provide with reference to and explanation use, be not used for being any limitation as the present invention.
In accompanying drawing,
Fig. 1 is the cross-sectional view of existing liquid crystal display;
Fig. 2 is the plane schematic top plan view of the light guide plate of the present invention;
Fig. 3 is the equivalent circuit diagram of the light guide plate of the present invention;
Fig. 4 is the cross-sectional view of the liquid crystal display of the present invention.
Embodiment
Further to illustrate the technological means and its effect of the invention taken, below in conjunction with being preferable to carry out for the present invention
Example and its accompanying drawing are described in detail.
Referring to Fig. 2, present invention firstly provides a kind of light guide plate, including light conducting plate body 11, it is laid on the light guide plate
On the upper surface of body 11 in comb shape the first lead electrode 13 and be laid on the upper surface of light conducting plate body 11 with it is described
Relative the second lead electrode 15 in comb shape of first lead electrode 13.
Specifically, the light conducting plate body 11 is equal to light guide plate of the prior art, is provided with the light conducting plate body 11
Multiple scattering particles 111, for the backlight (such as LED light bar) of line style to be scattering into area source.Further, the light guide plate
Body 11 is close to the side of backlight because light energy is larger, and the negligible amounts of the scattering particles 111 of setting, particle diameter is smaller;And
Because light energy is smaller, the quantity of the scattering particles 111 of setting is more for side of the light conducting plate body 11 away from backlight, particle diameter compared with
Greatly.
Specifically, first lead electrode 13 is preferable with copper (Cu), chromium (Cr), molybdenum (Mo) or other electric conductivities
Metal is material, includes several first comb portions 132 of the first shank 131 described in the first shank 131 and vertical connection;It is described
Second lead electrode 15 also using the preferable metal of Cu, Cr, Mo or other electric conductivity as material, including the second shank 151 and
Several second comb portions 152 of second shank 151 described in vertical connection;First shank 131 is set relatively with the second shank 151
Put, several first comb portions 132 and several second comb portion, 152 interlaced settings, i.e., two neighboring first comb portion
One the second comb portion 152 is set between 132, first comb portion 132 is set between two neighboring second comb portion 152.
Further, the manufacturing process of first lead electrode 13 and the second lead electrode 15 is:First pass through film forming work
Skill, such as chemical vapor deposition (Chemical Vapor Deposition, CVD) technique or physical vapour deposition (PVD) (Physical
Vapor Deposition, PVD) technique the upper surface of light conducting plate body 11 formed one layer of preferable metallic film of electric conductivity,
Such as Cu, Cr, Mo, then by patterning process, such as etching technics, patterned process is carried out to metallic film, it is in comb shape to be made
The first lead electrode 13 and the second lead electrode 15 in comb shape.
With reference to Fig. 2 and Fig. 3, the lead electrode 15 of the first lead electrode 13 and second forms electric capacity C, and the two is carried itself
Resistance R, electric current can be produced by applying AC signal to the lead electrode 15 of the first lead electrode 13 and second so that institute
State the first lead electrode 13 to generate heat with the second lead electrode 15, so the light guide plate of the present invention is integrated with heating function.This is sent out
When bright light guide plate is applied to liquid crystal display, liquid crystal panel can be heated, make liquid crystal panel normal work at low ambient temperatures
Make, eliminate the setting of heating film in available liquid crystal display, cost is relatively low.Further, led by adjustment to described first
The frequency and voltage amplitude for the AC signal that the lead electrode 15 of line electrode 13 and second is applied, just can control and flow through resistance R
Electric current, so as to control the light guide plate of the present invention to the efficiency of heating surface of liquid crystal panel.In addition, the light guide plate of the present invention is applied to
During liquid crystal display, diffusion sheet and prismatic lens can be set on the light guide plate, due to the modulation of diffusion sheet and prismatic lens to light
The Morie fringe that the first lead electrode 13 and the adstante febre of the second lead electrode 15 are formed can also be eliminated, does not interfere with liquid crystal panel
Display image quality.
Referring to Fig. 4, with reference to Fig. 2 and Fig. 3, based on same inventive concept, the present invention also provides a kind of liquid crystal display, wraps
Include the backlight module BM and liquid crystal panel P being located on the backlight module BM.
Wherein, the backlight module BM includes light guide plate 1, diffusion sheet 2 and the prismatic lens 3 stacked gradually from bottom to top, is
The utilization rate of light is improved, reflector plate 5 can be set with the lower section of light guide plate 1.
As shown in Fig. 2 the light guide plate 1 includes light conducting plate body 11, is laid on the upper surface of light conducting plate body 11
The first lead electrode 13 and be laid on relative with first lead electrode 13 on the upper surface of light conducting plate body 11
Two lead electrodes 15.The lead electrode 15 of first lead electrode 13 and second is in comb shape.
Specifically, the light conducting plate body 11 is equal to light guide plate of the prior art, is provided with the light conducting plate body 11
Multiple scattering particles 111, for the backlight (such as LED light bar) of line style to be scattering into area source.Further, the light guide plate
Body 11 is close to the side of backlight because light energy is larger, and the negligible amounts of the scattering particles 111 of setting, particle diameter is smaller;And
Because light energy is smaller, the quantity of the scattering particles 111 of setting is more for side of the light conducting plate body 11 away from backlight, particle diameter compared with
Greatly.
Specifically, first lead electrode 13 is using the preferable metal of Cu, Cr, Mo or other electric conductivity as material, bag
Include several first comb portions 132 of the first shank 131 described in the first shank 131 and vertical connection;Second lead electrode 15
Also using the preferable metal of Cu, Cr, Mo or other electric conductivity as material, including described in the second shank 151 and vertical connection
Several second comb portions 152 of two shanks 151;First shank 131 is oppositely arranged with the second shank 151, and described several
One comb portion 132 and several second comb portion, 152 interlaced settings, i.e., one is set between two neighboring first comb portion 132
Individual second comb portion 152, first comb portion 132 is set between two neighboring second comb portion 152.
Further, the manufacturing process of first lead electrode 13 and the second lead electrode 15 is:First pass through film forming work
Skill, as CVD techniques or PVD in the upper surface of light conducting plate body 11 form one layer of preferable metallic film of electric conductivity, such as
Cu, Cr, Mo etc., then by patterning process, such as etching technics, patterned process is carried out to metallic film, is made in comb shape
First lead electrode 13 and the second lead electrode 15 in comb shape.
With reference to Fig. 2 and Fig. 3, the lead electrode 15 of the first lead electrode 13 and second forms electric capacity C, and the two is carried itself
Resistance R, electric current can be produced by applying AC signal to the lead electrode 15 of the first lead electrode 13 and second so that institute
The first lead electrode 13 is stated to generate heat with the second lead electrode 15, so the light guide plate 1 is integrated with heating function, can be to liquid crystal
Panel P is heated, and is made liquid crystal panel P normal works at low ambient temperatures, is eliminated the setting of heating film in available liquid crystal display,
Cost is relatively low.Further, letter is exchanged with what the second lead electrode 15 was applied to first lead electrode 13 by adjustment
Number frequency and voltage amplitude, the electric current for flowing through resistance R just can be controlled, so as to control heating of the light guide plate 1 to liquid crystal panel P
Efficiency.Further, since the modulation of diffusion sheet 2 and prismatic lens 3 to light can also eliminate the first lead electrode 13 and the second wire
The Morie fringe that the adstante febre of electrode 15 is formed, liquid crystal panel P display image quality is not interfered with.
In summary, light guide plate of the invention, laid on light conducting plate body upper surface the first lead electrode and with it is described
The second relative lead electrode of first lead electrode, first lead electrode and the second lead electrode form electric capacity, by right
First lead electrode and the second lead electrode apply AC signal and produce electric current so that first lead electrode and second
Lead electrode is generated heat, so the light guide plate of the present invention is integrated with heating function, the light guide plate is applied into liquid crystal display, can
Liquid crystal panel is heated on the basis of liquid crystal panel display image quality is not influenceed, makes liquid crystal panel normal work at low ambient temperatures
Make, and cost is relatively low.The liquid crystal display of the present invention, using the above-mentioned light guide plate for being integrated with heating function, passes through the leaded light
Plate heats to liquid crystal panel, can make liquid crystal panel normal work at low ambient temperatures, and image quality is unaffected, and whole liquid
The cost of crystal display is relatively low.
It is described above, for the person of ordinary skill of the art, can be with technique according to the invention scheme and technology
Other various corresponding changes and deformation are made in design, and all these changes and deformation should all belong to the claim of the present invention
Protection domain.
Claims (10)
1. a kind of light guide plate, it is characterised in that including light conducting plate body (11), be laid on the light conducting plate body (11) upper surface
On the first lead electrode (13) and be laid on the light conducting plate body (11) upper surface and first lead electrode (13)
Relative the second lead electrode (15);
First lead electrode (13) forms electric capacity (C) with the second lead electrode (15), by first lead electrode
(13) apply AC signal with the second lead electrode (15) and produce electric current so that first lead electrode (13) and the second wire
Electrode (15) generates heat.
2. light guide plate as claimed in claim 1, it is characterised in that first lead electrode (13) and the second lead electrode
(15) it is in comb shape.
3. light guide plate as claimed in claim 2, it is characterised in that first lead electrode (13) includes the first shank
(131) and the first shank (131) described in vertical connection several first comb portions (132), second lead electrode (15) bag
Include several second comb portions (152) of the second shank (151) described in the second shank (151) and vertical connection;
First shank (131) is oppositely arranged with the second shank (151), several first comb portions (132) and several the
Two comb portions (152) interlaced setting.
4. light guide plate as claimed in claim 1, it is characterised in that first lead electrode (13) and the second lead electrode
(15) material is one kind in copper, chromium, molybdenum.
5. light guide plate as claimed in claim 1, it is characterised in that be provided with multiple scattering particles in the light conducting plate body (11)
(111)。
6. a kind of liquid crystal display, it is characterised in that including backlight module (BM) and the liquid being located on the backlight module (BM)
Crystal panel (P);
The backlight module (BM) includes light guide plate (1), diffusion sheet (2) and the prismatic lens (3) stacked gradually from bottom to top;
The light guide plate (1) includes light conducting plate body (11), first be laid on the light conducting plate body (11) upper surface is led
Line electrode (13) and second relative with first lead electrode (13) is laid on the light conducting plate body (11) upper surface
Lead electrode (15);
First lead electrode (13) forms electric capacity (C) with the second lead electrode (15), by first lead electrode
(13) apply AC signal with the second lead electrode (15) and produce electric current so that first lead electrode (13) and the second wire
Electrode (15) generates heat, to be heated to the liquid crystal panel (P).
7. liquid crystal display as claimed in claim 6, it is characterised in that first lead electrode (13) and the second wire electricity
Pole (15) is in comb shape.
8. liquid crystal display as claimed in claim 6, it is characterised in that the backlight module (BM) also includes being located at described lead
Reflector plate (5) below tabula rasa (1);Multiple scattering particles (111) are provided with the light conducting plate body (11).
9. liquid crystal display as claimed in claim 7, it is characterised in that first lead electrode (13) includes the first shank
(131) and the first shank (131) described in vertical connection several first comb portions (132), second lead electrode (15) bag
Include several second comb portions (152) of the second shank (151) described in the second shank (151) and vertical connection;
First shank (131) is oppositely arranged with the second shank (151), several first comb portions (132) and several the
Two comb portions (152) interlaced setting.
10. liquid crystal display as claimed in claim 6, it is characterised in that first lead electrode (13) and the second wire
The material of electrode (15) is one kind in copper, chromium, molybdenum.
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CN108646450A (en) * | 2018-04-23 | 2018-10-12 | 深圳市华星光电半导体显示技术有限公司 | A kind of heating system and heating means of display panel |
CN111752026A (en) * | 2020-06-30 | 2020-10-09 | 广州同华实业有限公司 | Liquid crystal display temperature compensation device and liquid crystal display |
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