A kind of Polarizer of liquid crystal display
Technical field the present invention relates to a kind of assembly of LCD, relates in particular to a kind of Polarizer and the liquid crystal display that uses this Polarizer.
Background technology polaroid (polarizer) is one of significant components of liquid crystal indicator (LCD), and it is a kind of optical thin film with generation polarized light function that is composited by the layer high molecule material.As shown in Figure 1, polaroid is fitted in the two sides of liquid crystal cell 4, is referred to as polaroid 01 (or claiming the transmission sheet) and following polaroid 02 (or claiming reflector plate) respectively, and its function is the polarization of lightization with backlight.Liquid crystal indicator is through changing the electric signal of liquid crystal layer in the liquid crystal cell; Make the liquid crystal molecule of liquid crystal layer produce the optical channel that twisted arrangement formation has certain windup-degree; When polarized light passed through optical channel, its conducting amount and the amount of ending were controlled, thereby demonstrate painted picture.
General last polaroid structure is a sandwich structure at present, and is as shown in Figure 1, is made up of two- layer protection tunic 04,05 and middle one deck light polarizing film 03.Wherein, light polarizing film 03 is processed for polyvinyl alcohol material stretches through dyeing, and its performance has determined polarizing properties, the transmitance of polaroid, also is to influence polaroid color harmony optical durability simultaneously.The light polarizing film of processing owing to polyvinyl alcohol (PVA) 03 is prone to suction, fades and lose polarizing properties; Therefore need respectively use one deck optical homogeneity and transparent excellent protection tunic 04,05 to completely cut off moisture and air and protect light polarizing film on its both sides, described protection tunic 04,05 general cellulose triacetate (TAC) film that uses.If adopt protection tunic to can be made into anti-ultraviolet type polaroid and anti-dazzle type polaroid with ultraviolet isolation (UV CUT) and anti-dazzle (Anti-Glare) function.Polaroid is fitted on the glass of liquid crystal cell 4 41 and has just formed LCD device.
Along with various liquid crystal indicators; Particularly the utilization of large-screen liquid crystal display television more and more widely; People to liquid crystal display increasingly high technical requirement has been proposed, visual sense of beauty requires and cost requirement, for example ultra-thinization of outward appearance aspect claimed structure, no frameization, the magnificent light of panel; Aspect practicality, require anti-humidity and shock resistance; Aspect optical characteristics, require to improve contrast, reduce the luminous flux loss; Along with the utilization of 3-D technology on the liquid crystal indicator, liquid crystal display also needs to show the degree of depth level effect of image frame; On the other hand, people require the manufacturing cost of liquid crystal display more and more lower.Polaroid is especially gone up the correlated performance that polaroid is directly connected to liquid crystal display as ingredient important in the liquid crystal display.Polaroid of the prior art can not satisfy these technical requirements fully, is embodied in:
1, if with the polaroid of cellulose triacetate film as the protection tunic, (permeability is about 300g/m because the protection tunic still has certain moisture permeability
2/ day), its protective capability is slightly not enough under hot and humid situation;
2, the surperficial scratch resistance ability of protection tunic is after being coated with one deck scratch resistance coating (hard coat layer); Can reach the highest 3H in theory; But because polaroid is a flexible material; Thickness is generally about 300 μ, directly is attached on the glass of fragile liquid crystal cell, and polaroid does not have enough rigidity to realize the scratch resistance requirement that intensity is higher;
3, because polaroid is made up of flexible material, do not protect the function of liquid crystal cell, when liquid crystal display receives external force collision or pressurized when excessive, liquid crystal cell very easily damages;
4, as shown in Figure 2, disturb in order to prevent ambient light, the exiting surface of the protection tunic 04 of polaroid adopts pitted skin to handle to reach antiglare effect (Anti-Glare) usually.This pitted skin is handled has dual character, though reached the purpose of disperseing external interference light, the light that also liquid crystal cell is sent has simultaneously produced peptizaiton, has reduced the contrast performance of liquid crystal display.
Had at present to display appearance structure and security aspect improved " hard screen " technology to begin utilization, realized not having characteristics such as frame, magnificent and shock resistance such as display surface.As shown in Figure 3; Only just on original liquid crystal display, increased by a floor height passes through hard material 06 to this hard screen 09; Like organic glass (acrylic board), printing black surround glass etc.; Need to attach on two faces of high hard material 06 thoroughly and go up protection tunic 07, the hard screen 09 of this relatively independent interpolation does not relate to the basic structure of the liquid crystal display that is made up by polaroid.Because have the slit between screen 09 and the liquid crystal display firmly, the polarized light that liquid crystal display sends can produce birefringence and internal reflection at the place, slit, thereby directly influences the quality of display frame.As a kind of improvement, between the polaroid 01 of this hard screen 09 and liquid crystal display, inject leaded light resin 08, this method has solved the disadvantage that adopts the birefringence that this " hard screen " bring, but has increased manufacturing process difficulty and cost.
Summary of the invention the purpose of this invention is to provide a kind of Polarizer with transmission-type polarisation function, the anti-reflection function of brightness, antireflection function, anti-impact bump defencive function, the ultra-thin plane decoration function of complete machine structure.
For realizing above-mentioned purpose; Polarizer of the present invention is glued on the exiting surface of liquid crystal cell, and it comprises polyvinyl alcohol film and protection tunic, and described protection tunic is glued on the exiting surface of polyvinyl alcohol film; Wherein, Polarizer also comprises glass substrate, and this glass substrate is glued on the face of exiting surface that polyvinyl alcohol film relies on liquid crystal cell, as the protective seam of polyvinyl alcohol film another side.
Adopt above structure, compared with prior art, have following advantage:
1, because Polarizer uses glass substrate as ingredient, improves the ability of anti-external impact of liquid crystal display and pressure, compare, when guaranteeing hardness, dwindled the thickness of liquid crystal display effectively with " hard screen " of the prior art;
2, the moisture vapor transmission rate of glass substrate is little, even under the environment of HTHP, also can play protection effectively to polyvinyl alcohol film;
3, because each layer of polaroid very frivolous and arrived enough intensity all uses the liquid crystal indicator of this Polarizer can adopt no frame structural design;
4, emergent ray makes the horizontal visible angle of liquid crystal indicator enlarge through the refraction action of glass substrate in the hard screen polaroid;
5,, improved the degree of depth stereovision effect of image frame effectively, for 3-D technology utilizes the condition created more fully owing to the internal reflection characteristic of glass substrate;
6, the structure that not only integrates functions as one of this Polarizer, it is made integrated cost and has reduced many with respect to the structure that " hard screen " of the prior art adds liquid crystal display.
Cellulose triacetate film that protection tunic of the present invention is the high grade of transparency or polyethylene terephthalate film.The protection tunic can be selected the various materials that are used to make liquid crystal display polaroid protection tunic in the prior art for use, wherein preferred cellulose triacetate film and polyethylene terephthalate film.
The glass substrate of Polarizer is the sheet glass of 0.5 millimeter to 2.5 millimeters of thickness.Wherein, preferred thickness is 0.7 millimeter to 1.1 millimeters a sheet glass.The sheet glass of this thickness has enough pliabilities and physical strength concurrently, is convenient to Polarizer and liquid crystal cell exiting surface are carried out relevant gummed construction processing and processing.
The glass substrate of Polarizer adopts intensive treatment, and described intensive treatment is that chemical tempering is handled or air-cooled tempering is handled.The bearing stress value of glass substrate is greater than 450Mpa behind the tempering.Described toughening method is glass tempering method commonly known in the art, like ion exchange process in the chemical tempering etc.Glass substrate behind the tempering can provide higher working strength for liquid crystal display.
Vapor deposition has more than one coating in anti-reflection vapor deposition layer, scratch resistance vapor deposition layer or the electrostatic prevention vapor deposition layer on the exiting surface of the protection tunic of Polarizer.Anti-reflection vapor deposition layer has anti-reflection function, thereby has improved optical contrast's performance of liquid crystal display.Scratch resistance vapor deposition layer has further improved the scratch resistance ability on liquid crystal display surface.Electrostatic prevention vapor deposition layer can effectively reduce the static charge that carry on the surface of Polarizer.
Be printed with pattern on Polarizer glass substrate or the protective seam face therein, the pattern of glass substrate adopts serigraphy, and printing-ink is resin type printing ink or the solid type printing ink of ultraviolet light or the slug type ceramic ink of infrared oven dry.Pattern on the protection tunic adopts offset printing.Described pattern can be that window etc. is passed through in frame, trade mark, icon, the remote control half of display screen, also can be other decorative patterns, adopts diversified design, can satisfy each manufacturer and consumer's different appearance requirement.
Gummed between each tunic of Polarizer adopts optics pressure sensitive adhesive gummed, and the face that described glass substrate relies on the exiting surface of liquid crystal cell is provided with optics pressure-sensitive adhesive layer and release diaphragm.After the Polarizer manufacturing is accomplished; Release diaphragm can not opened, and is convenient to the transportation and the storage of Polarizer, when on the exiting surface that need Polarizer be glued to liquid crystal cell; Throw off release diaphragm again and expose the optics pressure-sensitive adhesive layer, the exiting surface that aligns liquid crystal cell is installed.
In sum; Polarizer of the present invention has been gathered multiple functions such as polarisation function, the anti-reflection function of brightness, antireflection function, anti-impact bump defencive function, the ultra-thin plane decoration function of complete machine structure in one; Substitute traditional flexible polaroid, the invention solves that the unvanquishable loss of contrast of traditional flexible polaroid, security protection are poor, no decoration effect, liquid crystal display structure must embrace defectives such as frame.
Hereinafter combines accompanying drawing and embodiment that the present invention is done further detailed explanation:
Fig. 1 is the structural representation of liquid crystal display in the prior art;
Fig. 2 is the emitting light path figure that the protection tunic of polaroid in the prior art adopts pitted skin;
Fig. 3 is the structural drawing of hard screen in the prior art;
Fig. 4 is the embodiment 1 of Polarizer of the present invention and 2 structural representation;
Fig. 5 is the embodiment 3 of Polarizer of the present invention and 4 structural representation;
Fig. 6 is the structural representation of the embodiment 5 to 7 of Polarizer of the present invention.
Embodiment is as shown in Figs. 4-6; Polarizer of the present invention is glued on the exiting surface 41 of liquid crystal cell 4, and it comprises polyvinyl alcohol film 1 and protection tunic 2, and described protection tunic 2 is glued on the exiting surface 12 of polyvinyl alcohol film 1; Wherein, Polarizer also comprises glass substrate 3, and this glass substrate 3 is glued on the face 11 of exiting surface 41 that polyvinyl alcohol film 1 relies on liquid crystal cell 4, as the protective seam of polyvinyl alcohol film 1 another side.
Protection tunic 2 can be selected the various materials that are used to make liquid crystal display polaroid protection tunic in the prior art for use, wherein preferred cellulose triacetate film and polyethylene terephthalate film.
The glass substrate 3 of Polarizer is the sheet glass of 0.5 millimeter to 2.5 millimeters of thickness.Wherein, preferred thickness is 0.7 millimeter to 1.1 millimeters a sheet glass.
The glass substrate 3 of described Polarizer adopts intensive treatment, and described intensive treatment is that chemical tempering is handled or air-cooled tempering is handled.The bearing stress value of strengthening the back glass substrate is greater than 450Mpa.The not broken test of falling sphere should reach more than the 2J (0.6M/500g), and the plane does not have the S distortion, and arcuate deformation is less than 1/100.Described toughening method is glass tempering method commonly known in the art, like ion exchange process in the chemical tempering etc.
Vapor deposition has more than one coating 9 in anti-reflection vapor deposition layer, scratch resistance vapor deposition layer or the electrostatic prevention vapor deposition layer on the exiting surface 22 of the protection tunic 2 of hard screen polarizer.
Be printed with pattern 8 on described glass substrate 3 or the protection tunic 2.The pattern 8 of glass substrate 3 adopts serigraphy, and printing-ink is resin type printing ink or the solid type printing ink of ultraviolet light or the slug type ceramic ink of infrared oven dry.Pattern 8 on the protection tunic 2 adopts offset printing.Window etc. is passed through in the frame that described pattern 8 can be a display screen, trade mark, icon, remote control half, also can be other decorative patterns.
Gummed between each tunic of Polarizer adopts optics pressure sensitive adhesive gummed, and the face 31 that described glass substrate 3 relies on the exiting surface 41 of liquid crystal cell 4 is provided with optics pressure-sensitive adhesive layer 7 and release diaphragm 5.After the Polarizer manufacturing is accomplished; Release diaphragm 5 can not opened, and is convenient to the transportation and the storage of Polarizer, when the 41 last times of exiting surface that need Polarizer be glued to liquid crystal cell 4; Throw off release diaphragm 5 again and expose optics pressure-sensitive adhesive layer 7, the exiting surface 41 that aligns liquid crystal cell 4 is installed.
After Polarizer completes, can on the exiting surface of Polarizer, cover one deck and can open the film 6 of peeling off and not staying vestiges.
Embodiment 1: as shown in Figure 4; Polarizer of the present invention is glued on the exiting surface 41 of liquid crystal cell 4; It comprises polyvinyl alcohol film 1 and cellulose triacetate film 2, and described cellulose triacetate film 2 is glued on the exiting surface 12 of polyvinyl alcohol film 1, wherein; Polarizer also comprises the glass substrate 3 of 0.5 millimeter thickness of a slice, and this glass substrate 3 is glued on the face 11 of exiting surface 41 that polyvinyl alcohol film 1 relies on liquid crystal cell 4.Gummed between each layer adopts optics pressure-sensitive adhesive layer 7 to carry out.Cellulose triacetate film 2 relies on that offset printing is printed with decorative pattern 8 on the face 21 of exiting surface 41 of liquid crystal cell 4.
Embodiment 2: as shown in Figure 4; Polarizer of the present invention is glued on the exiting surface 41 of liquid crystal cell 4; It comprises polyvinyl alcohol film 1 and polyethylene terephthalate film 2, and described polyethylene terephthalate film 2 is glued on the exiting surface 12 of polyvinyl alcohol film 1, wherein; Polarizer also comprises the glass substrate 3 of 2.5 millimeters thickness of a slice, and this glass substrate 3 is glued on the face 11 of exiting surface 41 that polyvinyl alcohol film 1 relies on liquid crystal cell 4.Gummed between each layer adopts optics pressure-sensitive adhesive layer 7 to carry out.Polyethylene terephthalate film 2 relies on that offset printing is printed with decorative pattern 8 on the face 21 of exiting surface 41 of liquid crystal cell 4.
Embodiment 3: as shown in Figure 5; Polarizer of the present invention is glued on the exiting surface 41 of liquid crystal cell 4; It comprises polyvinyl alcohol film 1 and cellulose triacetate film 2, and described cellulose triacetate film 2 is glued on the exiting surface 12 of polyvinyl alcohol film 1, wherein; Polarizer also comprises the glass substrate 3 of 0.7 millimeter thickness of a slice, and this glass substrate 3 is glued on the face 11 of exiting surface 41 that polyvinyl alcohol film 1 relies on liquid crystal cell 4.Gummed between each layer adopts optics pressure-sensitive adhesive layer 7 to carry out.Cellulose triacetate film 2 relies on that offset printing is printed with decorative pattern 8 on the face 21 of exiting surface 41 of liquid crystal cell 4.Vapor deposition has anti-reflection vapor deposition layer and scratch resistance vapor deposition layer 9 on the exiting surface 22 of described cellulose triacetate film 2.
Embodiment 4: as shown in Figure 5; Polarizer of the present invention is glued on the exiting surface 41 of liquid crystal cell 4; It comprises polyvinyl alcohol film 1 and polyethylene terephthalate film 2, and described polyethylene terephthalate film 2 is glued on the exiting surface 12 of polyvinyl alcohol film 1, wherein; Polarizer also comprises the glass substrate 3 of 1.1 millimeters thickness of a slice, and this glass substrate 3 is glued on the face 11 of exiting surface 41 that polyvinyl alcohol film 1 relies on liquid crystal cell 4.Gummed between each layer adopts optics pressure-sensitive adhesive layer 7 to carry out.Polyethylene terephthalate film 2 relies on that offset printing is printed with decorative pattern 8 on the face 21 of exiting surface 41 of liquid crystal cell 4.Vapor deposition has anti-reflection vapor deposition layer, scratch resistance vapor deposition layer and electrostatic prevention vapor deposition layer 9 on the exiting surface 22 of described polyethylene terephthalate film 2.
Embodiment 5: as shown in Figure 6; Polarizer of the present invention is glued on the exiting surface 41 of liquid crystal cell 4; It comprises polyvinyl alcohol film 1 and cellulose triacetate film 2, and described cellulose triacetate film 2 is glued on the exiting surface 12 of polyvinyl alcohol film 1, wherein; Polarizer also comprises the glass substrate 3 of 0.55 millimeter thickness of a slice, and this glass substrate 3 is glued on the face 11 of exiting surface 41 that polyvinyl alcohol film 1 relies on liquid crystal cell 4.Gummed between each layer adopts optics pressure-sensitive adhesive layer 7 to carry out.Glass substrate 3 relies on that serigraphy has decorative pattern 8 on the face 31 of exiting surface 41 of liquid crystal cell 4.Vapor deposition has anti-reflection vapor deposition layer, scratch resistance vapor deposition layer and electrostatic prevention vapor deposition layer 9 on the exiting surface 22 of described cellulose triacetate film 2.
Embodiment 6: as shown in Figure 6; Polarizer of the present invention is glued on the exiting surface 41 of liquid crystal cell 4; It comprises polyvinyl alcohol film 1 and cellulose triacetate film 2, and described cellulose triacetate film 2 is glued on the exiting surface 12 of polyvinyl alcohol film 1, wherein; Polarizer also comprises the glass substrate 3 of a slice 1.8 millimeters thick, and this glass substrate 3 is glued on the face 11 of exiting surface 41 that polyvinyl alcohol film 1 relies on liquid crystal cell 4.Gummed between each layer adopts optics pressure-sensitive adhesive layer 7 to carry out.Glass substrate 3 relies on that serigraphy has decorative pattern 8 on the face 31 of exiting surface 41 of liquid crystal cell 4.Vapor deposition has anti-reflection vapor deposition layer 9 on the exiting surface 22 of described cellulose triacetate film 2.
Embodiment 7: as shown in Figure 6; Polarizer of the present invention is glued on the exiting surface 41 of liquid crystal cell 4; It comprises polyvinyl alcohol film 1 and cellulose triacetate film 2, and described cellulose triacetate film 2 is glued on the exiting surface 12 of polyvinyl alcohol film 1, wherein; Polarizer also comprises the glass substrate 3 of a slice 0.9 millimeters thick, and this glass substrate 3 is glued on the face 11 of exiting surface 41 that polyvinyl alcohol film 1 relies on liquid crystal cell 4.Gummed between each layer adopts optics pressure-sensitive adhesive layer 7 to carry out.Glass substrate 3 relies on that serigraphy has decorative pattern 8 on the face 31 of exiting surface 41 of liquid crystal cell 4.Vapor deposition has anti-reflection vapor deposition layer 9 on the exiting surface 22 of described cellulose triacetate film 2.