CN1143162C - Light conduction plate and its making method, area source and liquid crystal display unit with light conduction plate - Google Patents
Light conduction plate and its making method, area source and liquid crystal display unit with light conduction plate Download PDFInfo
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- CN1143162C CN1143162C CNB981214347A CN98121434A CN1143162C CN 1143162 C CN1143162 C CN 1143162C CN B981214347 A CNB981214347 A CN B981214347A CN 98121434 A CN98121434 A CN 98121434A CN 1143162 C CN1143162 C CN 1143162C
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- guide plate
- light guide
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- lens component
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- 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
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
-
- 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
- G02B6/0065—Manufacturing aspects; Material aspects
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- 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
- G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
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- 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
- G02F1/133618—Illuminating devices for ambient light
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Planar Illumination Modules (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Liquid Crystal (AREA)
Abstract
To provide a light guide plate etc. capable of reducing costs for parts and production, also decreasing power consumption of a main light source, and eliminating the needs for the main light source, by reducing the number of lenticular lens sheets or making them unnecessary. A light guide plate 1 is resin-molded by using a die, and an external light intake part 1a is formed on one upper end of the light guide plate 1, and a 1st lens part 1e which consists of plural lenticular unit lenses 1f is formed. The lenticular unit lenses are concave or convex triangular prisms. The vertical angles of the triangular prisms are formed 125 to 165 degrees. The external light intake part 1a takes in external light, and the most of the incident light is finally made to exit from the 1st lens part 1e as synthesized light having uniform directivity.
Description
Technical field
The present invention relates to light guide plate, use area source, liquid crystal indicator and the manufacturing method of light conducting board of this light guide plate, in more detail, include and be taken into the light guide plate that is taken into part from the outer light of outer light such as sunshine and fluorescent light, use the area source of usefulness backlight of the liquid crystal indicator of this light guide plate, resemble liquid crystal indicator and the manufacturing method of light conducting board thereof that camera and TV camera mirror the modes backlight such as LCD monitor of subject with numeral is quiet.
Background technology
As the area source of the usefulness backlight of liquid crystal indicator, known the area source of light transmission flat board as the ambient light mode of light guide plate.In this area source, side from the side end face of the light guide plate that constitutes by transparent parallel flat and section plate wedge, incident is from the light of light sources such as fluorescent light, utilize the dull and stereotyped inner total reflection of light transmission, make light propagate the universe that spreads all over to light guide plate, the part of its propagates light with the scattered reflection light of the formation of the light scattering reflecting plate inside the light guide plate less than critical angle, is penetrated diffusion light (opening clear 55-16201 in fact) from the light guide plate surface.
In addition, known handle has the projection of triangular prism type lenticular lens in one side, another side is the lens of even surface, raised face (RF) is overlapped on the light guide plate surface of above-mentioned area source up, utilize the optically focused effect of lens, can be the isotropically evenly diffusion (opening flat 4-107201 in fact) in the desired angle scope of this diffusion radiation light.
Under the situation that this lens and the transparent diffuser plate of frosted (frosted slide) are used in combination, compare with the situation (No. the 4729067th, United States Patent (USP)) of the transparent diffuser plate of independent use frosted, the luminous energy emphasis of light source is distributed in the predetermined angle scope of expectation, and in this angular range, can obtains isotropic uniformly strong diffusion light.
And at present as the high brightness countermeasure backlight that is used for liquid crystal indicator, as shown in Figure 1, tend to adopt two overlapping squarely structures of lenticular lens (monthly magazine: display, in May, 1996 P35～P39).
In addition, for outer light such as sunshine and room lights as secondary light source, known on the side end face of light guide plate, be provided with outside light be taken into the area source of usefulness backlight of part, this outer light be taken into partly to be shaped as section circular-arc, constitute a cylindrical lens (spy opens flat 5-11249).
But, in the area source of in the past liquid crystal indicator, not only there is the narrow problem of visual characteristic, and owing to use two pieces of lenticular lens sheets, so this part production part cost not only, overlap installation owing to must carry out square position to two pieces of lenticular lens simultaneously, produce very big manufacturing cost so exist, the problem of using goods backlight to become expensive.In addition, owing to quietly resemble camera and TV camera to mirror the consumed power of liquid crystal indicator self of subject very big with digital, even so control the consumed power of other Circuits System, but as camera apparatus integral body, be difficult to realize reducing effectively consumed power, its result, existence can not realize making the problem of camera apparatus long-timeization service time.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide the area source of liquid crystal indicator and use backlight, the light guide plate of being furnished with this area source, and this manufacturing method of light conducting board, wherein this liquid crystal indicator reaches one piece or do not need the lenticular lens sheet by the use number that makes the lenticular lens sheet, can reduce component costs and manufacturing cost, reduce the main light source consumed power simultaneously or can not need main light source.
To achieve these goals, the light guide plate of the present invention's first scheme integrally is shaped with resin, be furnished with the outer light that is taken into outer light and be taken into part, with will be outside described light be taken into the light emergence face that outer light that part is taken into penetrates, it is characterized in that, on described light emergence face, first lens component that formation is made of a plurality of two-sided protruding unit lenses recessed or convex form, the a plurality of two-sided protruding unit lenses of described first lens component is arranged on its crest line direction in parallel to each other, be approximately perpendicular to simultaneously described outer light be taken into the part y direction, with and apex angles be 125 the degree to 165 the degree.
The light guide plate of alternative plan of the present invention is characterised in that in the described light guide plate of first scheme, the apex angles of a plurality of two-sided protruding unit lenses of described first lens component is about 150 degree.
The light guide plate of third party's case of the present invention is characterised in that, in the described light guide plate of any scheme in first scheme or alternative plan, facing on the light reflection surface of described light emergence face, is furnished with second lens component that the two-sided protruding unit lenses by a plurality of recessed or convex form of using the ester moulding identical with described light guide plate constitutes, the a plurality of two-sided protruding unit lenses of described second lens component slightly is arranged in parallel mutually on its crest line direction, is approximately perpendicular to the crest line direction of a plurality of two-sided protruding unit lenses of described first lens component simultaneously.
The light guide plate of cubic case of the present invention is characterised in that in the described light guide plate of third party's case, the apex angles of a plurality of two-sided protruding unit lenses of described second lens component is that 125 degree are to 165 degree.
The light guide plate of the 5th scheme of the present invention is characterised in that in the described light guide plate of cubic case, the apex angles of a plurality of two-sided protruding unit lenses of described second lens component is about 150 degree.
The area source of the 6th scheme of the present invention is characterised in that, the light source of being furnished with the described light guide plate of any scheme in first scheme to the, six schemes and being taken into part, at least one face beyond described light emergence face and the described light reflection surface, installing at the outer light of described light guide plate.
The liquid crystal indicator of the present invention's the 7th scheme is characterised in that to be furnished with the described area source of the 6th scheme, and near the liquid crystal display of installing the light emergence face of described light guide plate.
The manufacturing method of light conducting board of the present invention's the 9th scheme, be make as first scheme to the, six schemes in the method for the described light guide plate of any one scheme, it is characterized in that, comprise with the be shaped operation of described light guide plate of metal pattern.
Description of drawings
Fig. 1 is the mode chart of liquid crystal indicator in the past.
Fig. 2 is the skeleton view of expression light guide plate of the present invention.
Fig. 3 is the curve map of expression Luminance Distribution characteristic.
Fig. 4 is the curve map of expression angle of visibility characteristic.
Fig. 5 is the skeleton view of expression light guide plate of the present invention.
Fig. 6 is the mode chart of expression area source of the present invention.
Fig. 7 is the skeleton view of expression light guide plate.
Fig. 8 is the mode chart of the section configuration of expression triangular prism component prism.
Fig. 9 is the curve map of expression with respect to the Luminance Distribution characteristic variations of prism pitch.
Figure 10 is the mode chart that expression is furnished with the liquid crystal indicator of area source of the present invention.
Embodiment
[embodiment]
Below, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 7 (A) and (B) be the expression light guide plate skeleton view, utilize this figure to define following term.
In Fig. 7 (A), be the triangle that forms with summit ABC that the triangular prism prism of bottom surface calls two-sided protruding unit lenses, and in Fig. 7 (B), be the pentagon with summit ABDEC formation that five corner post prisms of bottom surface call two-sided protruding unit lenses.But the two-sided protruding unit lenses 1f shown in is simple illustration here, is not limited to this, and in addition, cylinder, cylindroid and polygon post also can.In addition, in the figure, two-sided protruding unit lenses 1f only shows convex form, but not shown concave shape is also passable.
Is the triangle that forms with summit ABC among Fig. 7 (A) and Fig. 7 (B) the triangular prism component prism that the trequetrous prism of bottom surface calls two-sided protruding unit lenses.
The top that summit A among Fig. 7 (A) and Fig. 7 (B) is called the triangular prism component prism.
The apex angles that the angle of Fig. 7 (A) and Fig. 7 (B) mid point BAC formation is called the triangular prism component prism.
Fig. 8 is the mode chart of the section configuration of expression triangular prism component prism.
The triangular prism component prism is shown in Fig. 8 (A), be contemplated to be two equilateral triangles, but owing to for example no matter become the trapezoidal shape that lacks top A shown in Fig. 8 (B), or become the slick and sly crooked shape of the top A shown in Fig. 8 (C), performance to light guide plate does not exert an influence basically, so the prism of these shapes all is included in the application's the triangular prism component prism.
Fig. 2 is the skeleton view of expression light guide plate of the present invention.
The 1st, light guide plate is made and is used the light guide plate 1 of metal pattern by ester moulding, and light is taken into part 1a outside the top of light guide plate 1 end forms simultaneously, forms the first lens component 1e that is made of a plurality of two-sided protruding unit lenses 1f in addition.
The two-sided protruding unit lenses 1f of the first lens component 1e is the triangular prism prism, and its crest line direction roughly is parallel to each other, and is arranged in roughly that to be taken into the y direction of part 1a vertical with outer light.Particularly the drift angle of triangular prism prism according to result of calculation described later, is spent to the scope manufacturings of 165 degree by 125.In addition, if the drift angle of triangular prism prism at 125 degree to the scopes of 165 degree, even produce the triangular prism prism size, pitch, height and drift angle deviation and disperse, also can not influence the performance of light guide plate.As shown in Figure 9, even the pitch of prism changes in the scope of 10 μ m to 1000 μ m as can be known, the Luminance Distribution characteristic is not big yet to be changed.
Outer light is taken into part 1a and is taken into as outer light such as the sunshine of main light and room lights.It is more outstanding towards the last direction ratio first lens component 1e of figure that this outer light is taken into part 1a, its result, and with light guide plate comparison in the past, the surface area that makes outer light be taken into face becomes big.What outer light was taken into part 1a is shaped as the slightly fan-shaped shape of section, and its front end is circular-arc cylindrical lens, utilizes this lens effect, not only be taken into expeditiously from directly over outer light, but also be taken into expeditiously from the side or the oblique outer light of upper and lower.But outer light is taken into part 1a and is not limited to cylindrical lens into fan shape, and the even shape that does not for example form lens is also passable.
1c is a light entrance face, as described below, and the light that incident is omitted and is shone near the light source (not shown) of light entrance face 1c setting abreast.But, also can as light entrance face with it at the one or both sides configuration light source of two side 1b.
1d is a light reflection surface, improves reflection efficiency in order to prevent that light from leaking, and in ester moulding, also forms a plurality of cones that slightly are the circular cone concavity, after the point-like printing of carrying out behind ester moulding, reflecting plate (not shown)s such as aluminium is installed.
Utilize above-mentioned light guide plate, two the side 1b reflections of the light that is taken into part 1a and light entrance face 1c incident from the first lens component 1e, outer light with light reflection surface 1d and light guide plate 1, the most of of incident light finally penetrates as the synthetic light that even directivity is arranged from the first lens component 1e.Have again, on the 1b of this side,, white adhesive tape etc. is housed prevents leak part in order to prevent the leakage of light.
As the material of light guide plate 1, can from translucent material, select, use propenyl or polycarbonate resin usually.Light guide plate be shaped as parallel flat and section plate wedge, its thickness is generally about 1～10mm.
In addition, as other translucent material, but can use the acrylate of polymethylmethacrylate, polyacrylic acid methyl etc. or methacrylate etc. separately or transparent resin, clear glass, crystalline ceramics etc. such as the acrylate of the crosslinked polyfunctional polyurethane-acrylate of thermoplastic resin such as the polyester of copolymer, polyethylene terephthalate, polybutyleneterephthalate etc., polycarbonate, polystyrene, poly-methyl butene or ultraviolet ray or electron ray, polyester acrylate etc., unsaturated polyester (UP).
Below, the action of light guide plate of the present invention is described with reference to Fig. 2.
Utilize the outer light of light guide plate 1 to be taken into part 1a, make from outdoor sunshine or from indoor outer light incidents expeditiously such as fluorescent light.In addition, under the situation of a bright light source, with two side 1b reflection of light reflection surface 1d and light guide plate 1 by light entrance face 1c incident be taken into the outer light that part 1a is taken into from the light of light source with from outer light, the diffusion radiation light that imports towards the first lens component 1e direction that the optically focused effect is arranged in the desired angle scope as there being the synthetic light of even directivity to penetrate from the first lens component 1e.Therefore, mirror under the situation of LCD monitor of subject the liquid crystal indicator of being furnished with light guide plate of the present invention being used in digital quiet camera and the TV camera of resembling, needn't put under the degree of bright light source, can throw light on fully, its result reduces the consumed power that realizes various camera apparatus self and becomes possibility.
Fig. 3 is the curve map of the Luminance Distribution characteristic of expression light guide plate of the present invention.
Transverse axis is represented the position of light guide plate apart from lamp with 100% length of representing light guide plate with percent, and the position of value 0 be the endface position apart from the nearest light guide plate of lamp, on the other hand, is worth 100 position and is the endface position apart from lamp light guide plate farthest.
The longitudinal axis is representation unit not, and expression brightness, value is big more just mean bright more.
Luminance Distribution family curve shown in Figure 3 is the curve that the optical design evaluation software CODEV of employing U.S. ORA company exploitation analyzes the Luminance Distribution characteristic of light guide plate, as evaluating, from the light wavelength of light irradiation is 600nm, use the PMMA of representational refractive index 1.49 as the material of light guide plate, under the situation that the drift angle of triangular prism prism is changed by 90 °, 120 °, 135 °, 150 °, 165 ° and plane (promptly not having the triangular prism prism), the analog result of expression Luminance Distribution characteristic.
From figure, can obviously judge, the drift angle of the lens that uses with light guide plate in the past is the Luminance Distribution characteristic from 90 ° to 120 °, even more also be in more bad state with the situation on plane, and with in the past from 90 ° to 120 ° Luminance Distribution characteristic relatively, improved significantly from 135 ° to 165 ° Luminance Distribution characteristic.Can easily understand, remarkable especially from 135 ° to 165 ° characteristics improvement, particularly near 150 °, show the peak effect of Luminance Distribution characteristic.But, even some change of the refractive index of light wavelength and light guide plate material is little to the Luminance Distribution properties influence of distinguishing here.
Fig. 4 represents the curve of visual field characteristic.
Transverse axis is represented the field-of-view angle with respect to light guide plate, is worth 0 (not shown) and means vertical direction with respect to light guide plate, and in addition, value 90 means the horizontal direction with respect to light guide plate.
The longitudinal axis is representation unit not, and expression brightness, value is big more just mean bright more.
Visual field family curve shown in Figure 4 is the light guide plate visual field family curve of analyzing with above-mentioned same employing CODEV, as evaluating, from the light wavelength of light irradiation is 600nm, using representational refractive index as the material of light guide plate is 1.49 PMMA, under the situation that the drift angle of triangular prism prism is changed by 90 °, 120 °, 125 °, 135 °, 150 °, 165 ° and plane (promptly not having the triangular prism prism), the analog result of expression Luminance Distribution characteristic.
From figure, can obviously judge, relatively the drift angle of the lens that uses with light guide plate in the past is 90 ° an angle of visibility characteristic and when being 120 ° angle of visibility characteristic, constitute the result of non-constant from 90 ° to 120 ° situations, and on the other hand, compare with 90 ° angle of visibility characteristic in the past, greatly improved from 125 ° to 165 ° angle of visibility characteristic, understood the peak effect that occurs easily.
The drift angle scope that the applicant has broken away from lens in the past is 90 ° to 120 ° a fixed idea, carry out the result of the basic optical design simulation of light guide plate alone, find that the angle of visibility characteristic is improved significantly in 125 ° to 165 ° scope, according to this result, the suggestion of brand-new light guide plate has been proposed.
Fig. 5 is the skeleton view of expression light guide plate of the present invention.But, attached for the textural element that has illustrated with identical sequence number, and omit explanation.
When the light guide plate 1 of metal pattern by ester moulding used in preparation, on light guide plate 1, form the first lens component 1e and the second lens component 1g that constitute by a plurality of two-sided protruding unit lenses 1f that uses the ester moulding identical with light guide plate 1.
The two-sided protruding unit lenses 1f of the second lens component 1g is the same with the first lens component 1e to be the triangular prism prism, its crest line direction roughly is parallel to each other, be arranged in the y direction almost parallel (promptly roughly vertical with the crest line direction of the two-sided protruding unit lenses 1f of the first lens component 1e) that is taken into part 1a with outer light, the drift angle of triangular prism prism is formed in 125 degree to the scopes of 165 degree.In addition, if the drift angle of triangular prism prism is spent to the scopes of 165 degree 125,, also can not influence the performance of light guide plate even the size of triangular prism prism, pitch, height and drift angle produce deviation and discrete.
In addition, below the second lens component 1g, utilize aluminum evaporation etc. to carry out reflecting surface and handle (not shown), so that light can not see through.
Below, the effect of light guide plate of the present invention is described with Fig. 5.
Utilize the outer light of light guide plate 1 to be taken into part 1a, incident is from outdoor sunshine or from the outer light of indoor fluorescent light etc. expeditiously.In addition, under the situation of a bright light source, be taken into the outer light that part 1a is taken into by light entrance face 1c incident from the light of light source with from outer light with two side 1b reflections of the following and light guide plate 1 of the second lens component 1g.At this moment, the second lens component 1g has the effect of the light uniformization in light guide plate of making 1, the direction of the photoconduction of diffusion to the first lens component 1e.
And, utilizing the diffusion radiation light of the second lens component 1g to the direction importing of the first lens component 1e that the optically focused effect is arranged, conduct has the synthetic light of even directivity to penetrate from the first lens component 1e in the desired angle scope.Therefore, the liquid crystal indicator of being furnished with light guide plate of the present invention as quiet camera and the TV camera of resembling mirrors under the situation of uses such as LCD monitor of subject with numeral, needn't put under the degree of bright light source, can throw light on fully, its result makes the reduction of the consumed power that realizes various camera apparatus self become possibility.
Fig. 6 is the mode chart of expression area source of the present invention.
The 2nd, area source is made of light sources 3 such as light guide plate 1 of the present invention, fluorescent tube and various control circuit (not shown)s etc.In this control circuit, also comprise the total amount that for example detects the light that penetrates from the light emergence face of light guide plate 1, adjust the circuit that the power of supplying with light source 3 makes quantity of light emission become best.
The light that penetrates from light source 3 enters the inside of light guide plate 1 by reflecting body 4 reflections from the light entrance face 1c of light guide plate 1, in addition, outer light such as natural light is taken into the inside that part 1a enters light guide plate 1 from the outer light of light guide plate 1, be used in the reflecting plate 5 installed light reflection surface 1d bottom or the second lens component 1g and side end face 1b and carry out reflecting condensation repeatedly, penetrate to diffuser plate 6 from the first lens component 1e of light guide plate 1.And, to the light of diffuser plate 6 incidents, utilize the isotropically evenly diffusion in the desired angle scope of diffuser plate 6 and lens 7, penetrate from lens 7.But, according to purposes, from this area source 2, remove fluorescent tube and control circuit (not shown) etc., it is also passable to constitute the area source only be taken into outer light type, removes diffuser plate 6 and lens 7 is also passable.
Figure 10 is the mode chart that expression is furnished with the liquid crystal indicator of area source of the present invention.
In the liquid crystal indicator of Figure 10 (A), it is more outstanding to the display surface that light penetrates direction ratio liquid crystal display 9 to represent that outer light is taken into part, on the other hand, in the liquid crystal indicator of Figure 10 (B), it is more outstanding unlike the display surface of liquid crystal display 9 to light ejaculation direction to represent that outer light is taken into part.This two classes liquid crystal indicator outside light to be taken into all be good on the effect, but the liquid crystal indicator of Figure 10 (B) is because outer light is taken into partly more outstanding unlike the display surface of liquid crystal display 9, be taken into the injured of damage of part own and user so not only prevented this outer light, also do not damage the degree of freedom in the design.
The 8th, liquid crystal indicator is made of liquid crystal display 9 and area source of the present invention 2.Be imported into liquid crystal display 9 from the light of isotropically even diffusion of above-mentioned area source 2 and ejaculation.But, remove light source 3 from area source 2, only be used to from the liquid crystal indicator of the outer light of light guide plate 1 also passable.
In addition, in manufacturing method of light conducting board of the present invention, the metal pattern that comprises the Micropicture of processing the first lens component 1e, metal pattern with the Micropicture that uses the processing first lens component 1e and the second lens component 1g, the operation of the above-mentioned light guide plate that is shaped forms a plurality of two-sided protruding unit lenses of using the ester moulding identical with light guide plate when being shaped.
As described above, according to manufacturing method of light conducting board of the present invention, because in the operation of carrying out with metal pattern shaping light guide plate, also on light guide plate, form first lens component that constitutes by a plurality of two-sided protruding unit lenses that outer light is taken into part and does not need lenticular lens sheet in the past, become possibility so that subdue manufacturing cost significantly.
According to light guide plate of the present invention, be taken into part owing to form first lens component and the outer light that have constituted by a plurality of two-sided protruding unit lenses, so can subdue the use piece number of in the past necessary lenticular lens sheet or this lens not, its result makes and reduces manufacturing cost significantly and become possibility, and, make expeditiously to be taken into part from outer light and to be taken into as light outside the sunshine of main light and the room light etc. and to become possibility.
According to area source of the present invention and liquid crystal indicator, owing to use above-mentioned light guide plate, so can subdue component costs significantly, in addition, be taken into outer light owing to be taken into part from outer light expeditiously,, not only can reduce the power of supply light source so reaching under the situation of certain quantity of light emission, and, also can not need light source according to purposes.
In addition, according to liquid crystal indicator of the present invention, because it is more outstanding unlike the display surface of liquid crystal display that the outer light of light guide plate is taken into part, so that cause the injured principal element of device user to tail off, can guarantee security, and can prevent that this outer light is taken into the damage of part itself, keeps the degree of freedom in the design.
Claims (8)
1. light guide plate, integrally be shaped with resin, this light guide plate is furnished with: the outer light that is taken into outer light is taken into part, with will be outside described light be taken into the light emergence face that outer light that part is taken into penetrates, it is characterized in that, on described light emergence face, be formed with first lens component that constitutes by a plurality of two-sided protruding unit lenses recessed or convex form
Be arranged on its crest line direction the mutual almost parallel of a plurality of two-sided protruding unit lenses of described first lens component, be taken into the y direction approximate vertical of part simultaneously with described outer light, and its apex angles is that 125 degree are to 165 degree.
2. light guide plate as claimed in claim 1 is characterized in that, the apex angles of a plurality of two-sided protruding unit lenses of described first lens component is about 150 degree.
3. light guide plate as claimed in claim 1 or 2, it is characterized in that, facing on the light reflection surface of described light emergence face, is furnished with second lens component that the two-sided protruding unit lenses by a plurality of recessed or convex form of using the ester moulding identical with described light guide plate constitutes, be arranged on its crest line direction, simultaneously with the crest line direction approximate vertical of a plurality of two-sided protruding unit lenses of described first lens component mutual almost parallel of a plurality of two-sided protruding unit lenses of described second lens component.
4. light guide plate as claimed in claim 3 is characterized in that, the apex angles of a plurality of two-sided protruding unit lenses of described second lens component is that 125 degree are to 165 degree.
5. light guide plate as claimed in claim 4 is characterized in that, the apex angles of a plurality of two-sided protruding unit lenses of described second lens component is about 150 degree.
6. an area source is characterized in that, be furnished with as claim 1 to the claim 5 each described light guide plate and as described in the outer light of light guide plate be taken into part, as described in light emergence face and as described in the light source installed at least one face beyond the light reflection surface.
7. liquid crystal indicator is characterized in that being furnished with: the described area source of claim 6 and
Near the liquid crystal display of the light emergence face of described light guide plate, installing.
8. manufacturing method of light conducting board is used for making as claim 1 to each described light guide plate of claim 5, it is characterized in that, comprises with the be shaped operation of described light guide plate of metal pattern.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34123697A JP3316441B2 (en) | 1997-12-11 | 1997-12-11 | Light guide plate, surface light source using the light guide plate, liquid crystal display device, and method of manufacturing light guide plate |
| JP341236/1997 | 1997-12-11 | ||
| JP341236/97 | 1997-12-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1219681A CN1219681A (en) | 1999-06-16 |
| CN1143162C true CN1143162C (en) | 2004-03-24 |
Family
ID=18344451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB981214347A Expired - Fee Related CN1143162C (en) | 1997-12-11 | 1998-10-30 | Light conduction plate and its making method, area source and liquid crystal display unit with light conduction plate |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3316441B2 (en) |
| KR (1) | KR100326228B1 (en) |
| CN (1) | CN1143162C (en) |
| TW (1) | TW460737B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269839A (en) * | 2011-06-14 | 2011-12-07 | 友达光电股份有限公司 | Light guide plate and backlight module |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100318545B1 (en) * | 1999-12-20 | 2001-12-24 | 정명식 | Fabricating method of the mold of back light unit of liquid crystal device |
| KR100367008B1 (en) * | 2001-02-02 | 2003-01-09 | 심충건 | To manufacture light guide panel having prismatic function in LCD device |
| KR20020066788A (en) * | 2001-02-13 | 2002-08-21 | 심충건 | Light Guide Panel in LCD device with a latticed V-extruded type pattern and the manufacturing method of it |
| KR20020066787A (en) * | 2001-02-13 | 2002-08-21 | 심충건 | Light Guide Panel in LCD device with a latticed V-grooved printless type pattern |
| KR100883098B1 (en) * | 2002-04-26 | 2009-02-11 | 삼성전자주식회사 | Back light assembly and liquid crystal display device using the same |
| CN100401161C (en) * | 2003-05-21 | 2008-07-09 | 宇东科技股份有限公司 | Sidelight type back light module and liquid crystal display device |
| CN100376978C (en) * | 2003-08-14 | 2008-03-26 | 鸿富锦精密工业（深圳）有限公司 | Back light assembly |
| CN100368883C (en) * | 2003-10-21 | 2008-02-13 | 统宝光电股份有限公司 | Semi-transmission and semi-reflecting liquid crystal display panel |
| CN100405174C (en) * | 2004-07-24 | 2008-07-23 | 鸿富锦精密工业（深圳）有限公司 | Light conducting plate and back light module |
| KR100661147B1 (en) | 2004-10-09 | 2006-12-26 | 제일모직주식회사 | Light guide panel for LCD back light unit and LCD back light unit thereby |
| JP4533728B2 (en) * | 2004-11-29 | 2010-09-01 | 株式会社 日立ディスプレイズ | Liquid crystal display |
| KR100739797B1 (en) | 2006-02-23 | 2007-07-13 | 삼성전자주식회사 | Display device using a outside light |
| JP4385031B2 (en) * | 2006-03-31 | 2009-12-16 | 日本ライツ株式会社 | Light guide plate and flat illumination device |
| KR101866244B1 (en) | 2011-01-17 | 2018-06-12 | 삼성전자주식회사 | Scanning backlight unit and liquid crystal display having the same |
| TWI534685B (en) | 2012-03-28 | 2016-05-21 | 友達光電股份有限公司 | Touch screen display device |
| TW201426125A (en) * | 2012-12-26 | 2014-07-01 | Young Lighting Technology Inc | Light guide plate and backlight module |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0511249A (en) * | 1991-07-08 | 1993-01-19 | Hitachi Ltd | Liquid crystal display device |
| JP3123006B2 (en) * | 1992-06-30 | 2001-01-09 | 大日本印刷株式会社 | Surface light source and liquid crystal display |
-
1997
- 1997-12-11 JP JP34123697A patent/JP3316441B2/en not_active Expired - Fee Related
-
1998
- 1998-09-11 TW TW087115136A patent/TW460737B/en not_active IP Right Cessation
- 1998-10-30 CN CNB981214347A patent/CN1143162C/en not_active Expired - Fee Related
- 1998-12-10 KR KR1019980054269A patent/KR100326228B1/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269839A (en) * | 2011-06-14 | 2011-12-07 | 友达光电股份有限公司 | Light guide plate and backlight module |
| CN102269839B (en) * | 2011-06-14 | 2014-04-09 | 友达光电股份有限公司 | Light guide plate and backlight module |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11174439A (en) | 1999-07-02 |
| CN1219681A (en) | 1999-06-16 |
| KR100326228B1 (en) | 2002-04-17 |
| KR19990062975A (en) | 1999-07-26 |
| JP3316441B2 (en) | 2002-08-19 |
| TW460737B (en) | 2001-10-21 |
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| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: FURTORA SERVICE CO., LTD. Free format text: FORMER OWNER: SANYO MOTOR CO., LTD. Effective date: 20100108 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20100108 Address after: Delaware Patentee after: Service Co., Ltd. Address before: Osaka Japan Patentee before: Sanyo Electric Co., Ltd. |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040324 Termination date: 20131030 |