WO2005090855A1 - Light guide plate - Google Patents

Light guide plate Download PDF

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Publication number
WO2005090855A1
WO2005090855A1 PCT/JP2004/019534 JP2004019534W WO2005090855A1 WO 2005090855 A1 WO2005090855 A1 WO 2005090855A1 JP 2004019534 W JP2004019534 W JP 2004019534W WO 2005090855 A1 WO2005090855 A1 WO 2005090855A1
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WO
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Application
Patent type
Prior art keywords
light
light guide
guide plate
plate
plurality
Prior art date
Application number
PCT/JP2004/019534
Other languages
French (fr)
Japanese (ja)
Inventor
Kazuhisa Saito
Kenichi Yoshikawa
Original Assignee
System-Lab For K.G.
Priority date (The priority date 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 date listed.)
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Publication date

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/0001Light guides specially adapted for lighting devices or systems
    • G02B6/0011Light guides specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033Means for improving the coupling-out of light from the light guide
    • G02B6/0035Means 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
    • G02B6/00362-D arrangement of prisms, protrusions, indentations or roughened surfaces

Abstract

A light guide plate capable of efficiently reflecting the light introduced from an end face toward the front face is characterized by comprising a light-transmitting plate (10) having light-transmitting properties, a plurality of recessed portions (3) formed in the back face (9) of the light-transmitting plate (10), and peripheral projected portions (4) formed around respective recessed portions (3) so as to protrude from the back face (9). By having such a structure wherein the recessed portions (3) are surrounded by the peripheral projected portions (4) protruding from the back face (9), light incident on the peripheral projected portions (4) is reflected toward the in-plane direction and the front face of the light-transmitting plate, so that the light introduced from the end face can be efficiently reflected toward the front face.

Description

Specification

Light guide plate body

Technical field

[0001] The present invention, a television receiver, personal computer monitors, liquid crystal displays for electronic devices such as mobile phones, guide lights, direction indicators, various lamps, such as brake lamps, lighting, or of large signboard back convenient for use as a light relate very suitable light guide plate body.

BACKGROUND

[0002] Conventionally, a television receiver, a monitor of a personal computer, a liquid crystal display for electronic devices such as mobile phones, guide lights, direction indicators, various lamps, such as brake lamps, lighting, or as a back light of the large signboard cold cathode ray tube display, it is known to use a fluorescent tube display equipment and LED (Light Emitting device) array device. For example, in thin-type liquid crystal display device, on the back side of the liquid crystal image cell, although the backlight unit as a light-emitting body is provided, recent thin oriented, cold cathode tube or a white diode as a light source side-by-side ones are arranged on the end face of the transparent flat plate called a light guide plate such as an acrylic, and a light incident end surface force of its so as to diffuse light to the surface side while using a prism sheet or diffuser sheet. Figure 32 is a diagram illustrating a conventional backlight unit using such a light guide plate. As shown, the multiple reflections printing surface 224 that is printed coated fabric on the back portion 223 of the acrylic 榭脂 plate 222 is provided, the light introduced from the light source unit 220 with the end surface 225 of the acrylic 榭脂 plate 222 is reflected through the multiple reflections printing surface 224 thereof are to be led out to the surface 221 of the Atari Le 榭脂 plate 222. On the surface 22 1 of the acrylic 榭脂 plate 222, an optical member called a normal prism sheet and diffuser sheet is placed between the liquid crystal cell.

[0003] However used as backlight of a large signboard or the like other than the conventional liquid crystal display or a liquid crystal display, Ru light plate member is effectively light uniformly high brightness over the entire surface of the entire or large signboard of a liquid crystal display that is difficult to apply, irregularity on a part of the display unit and the light projecting unit occurs, there is a disadvantage such that it is impossible to bring out the performance of the liquid crystal display sufficiently. Further, although such recent LED array has attracted attention as an electronic component excellent in low power consumption and energy efficiency, it is necessary optical member, called a prism sheet or diffuser sheet, an amount corresponding to the part and by increasing the cost of manufacturing a liquid crystal display.

Disclosure of the Invention

[0004] The present invention has solved the problems described above, the television receiver, a monitor of a personal computer, the efficiency in the high luminance evenly over the entire surface of the entire or large signboard of a liquid crystal display such as a mobile phone may shed light can improve the performance of liquid crystal display or large signboard, very used convenient for use, without permission goodness is intended to obtain a light guide plate body. Also, to configure the backlight unit at a relatively simplified structure, and an object thereof is to provide a light guide plate body can achieve a dramatic reduction in manufacturing cost.

[0005] light guide plate member of the present invention for achieving the above object includes a light-transmitting plate having a light-transmitting property, and a plurality of recesses formed on the rear surface of the light-transmissive plate body, the periphery of the recess characterized in that it has a peripheral projecting portion formed so as to protrude before Symbol back force. The structure having a peripheral projecting portion in the peripheral portion is formed so as to protrude the back force of such recess, light incident on the peripheral projecting portion, the surface of the plane direction and the transparent plate member go is reflected to the side, it is possible to reflect the light introduced, for example, from the end face of the light transmitting plate having a light transmitting property to efficiently surface.

[0006] According to a preferred example of the light guide plate of the present invention, the transparent plate member is Ri Do a polymer material, wherein the peripheral projecting portion is the back of the transparent plate member during formation of the recess side, characterized in that it is formed simultaneously by thermal press-E. Examples of the translucent plate member, for example a polyester 榭脂, amorphous polyester 榭脂, polymethyl methacrylate click relay HPMMA) acrylic such 榭脂, polycarbonate 榭脂, polystyrene 榭脂 (PS), styrene. Acrylonitrile 榭脂 ( SAN), urethane 榭脂, Shikuroorefuin 榭脂, alicyclic polyolefin 榭脂, annular port Riorefuin 榭脂, cycloaliphatic acrylic 榭脂, amorphous fluorine-based 榭脂, epoxy 榭脂, polyimide 榭脂, polyamide 榭fat, various transparent polymer material such as vinyl ester 榭脂 can Rukoto used, it may be a combination of these modified materials and more 榭脂 material. Before KiToruhikari resistance plate body, by a light of a force that processing having a function of reflecting the surface side is widely used in plastic force 卩 E Ru heat pressing from the end face, near collision of the foregoing Article section as possible out to form a shape bulging to the back side of the relatively easily the translucent plate member.

[0007] Further, according to the preferred example of the light guide plate of the present invention, the light-transmitting plate material made of the polymer material is a flat plate, the heat pressing is heated with a protrusion corresponding to the recess It can be performed by plates or rolls for pressurizing E. The use of plates or rolls for heating processing, the structure of the processing apparatus becomes relatively simple, and also suitable for mass production.

[0008] Moreover, other light guide plate member of the present invention for achieving the above object, a high frequency consists element material translucent plate member having a light-entire surface of the back surface of the transparent plate body characterized by providing a plurality of concave portions having a recess over. Light from the light source is introduced into light-transmitting plate material comprising polymeric materials force having transparency, a large number of concave portions having the introduced light is provided with a recess viewed portion provided on the rear surface of the translucent plate member advance by changing the orientation by. As a result, a television receiver in which the light-emitting without unevenness, a personal computer, are very suitable as backlights of a liquid crystal display of the mobile phone.

[0009] According to a preferred example of the light guide plate of the present invention, the concave portion, a large number of waves streak, many had intersections book inclined parallel inclined streak, and have a cross-section large number of straight interlinked, parallel orthogonal streak! / that, it is possible, including those formed by either displacement, also the concave portion can also include those formed with a number of point-like recesses it is. Further, as a machining method of the concave portion of the light guide plate of the present invention as described above can be used as the high-frequency processing or ultrasonic processing.

[0010] light guide plate member of the present invention, as described above, the plurality of recesses in the rear portion of the translucent plate member is formed, in the peripheral portion of the recess is formed so as to protrude the back force are configured to have a peripheral projecting portion, the light incident on the peripheral projecting portion at this portion is gradually being reflected to the surface side of the plane direction and the transparent plate member, Toru having transparency it is possible to reflect light e.g. introduced end surface strength of the light resistance plate bodies to efficiently surface.

[0011] Another light plate member of the present invention, as described above, a number of concave having a recess over the entire surface of the back of the light-transmitting plate material such as an acrylic 榭脂 plate having translucency parts and have a provided structure in which the light issued from the light source by adjacent to the end surface wall portion of the translucent plate member to a light source for introducing light provided on the transparent plate member, energizing the light source It is introduced into the light transmitting plate having a light-transmitting property. Light exits the surface strength of the light guide substrate translucent plate member is uneven with the introduced light travels redirected by a number of concave portions having a recess portion provided on the rear surface of the translucent plate member television receiver in which the light-emitting without causing, monitor of personal combi user data, is suitable for extremely as Roh backlight of a liquid crystal display for an electronic device such as a mobile phone.

[0012] Furthermore, in particular light at a high luminance evenly over a wide range reflection conducive source of light by providing a plurality of recessed portions it was deeper than recess in the central portion of the rear surface of the light guide substrate improving the performance of a large signboard out, it is to act very conveniently as a backlight of a large signboard thereof.

[0013] Further, emitted from the light source since the plurality of concave portions having a recess portion provided over the entire surface of the back surface of the translucent plate member is obtained by forming in a large number of waves streak having a cross-section light is shall increase the brightness of light emitted from the entire surface of the irregular reflection by light guide substrate in a variety of multi-way multi-number wave streak countercurrent.

[0014] Further, a plurality of concave portions having a recess portion provided over the entire surface of the back of the light-transmitting plate material exits from the light source in those formed in parallel orthogonal stripes inclined many books that have cross-section light is intended to increase the brightness of light emitted from both ends faces of the light guide substrate corresponding to the provided large number of orthogonally reflected by the parallel orthogonal streak light board light source of which have cross-section direction .

[0015] Further, a plurality of concave portions having a recess portion provided over the entire surface of the back of the light-transmitting plate material exits from the light source in those formed in parallel inclined stripes orthogonal many books that have cross-section light is intended to increase the brightness of light emitted from both ends faces of the light guide substrate corresponding to the provided large number of orthogonally reflected by the parallel orthogonal streak light board light source of which have cross-section direction .

[0016] In addition, the different in the plurality of recesses spacing of the point-like concave portions in those formed in a number of point-like recesses having a provided a recess over the entire surface of the back surface of the translucent plate member it is easy to form the light guide substrate, those that can be used effectively as a backlight can be used Shirubekomoto plate having a luminance that is suitable for a liquid crystal display or large billboards.

[0017] As described above, the light guide plate body of the present invention, a television receiver, a monitor of a personal computer, a high brightness without unevenness over the entire surface of the entire or large signboard of a liquid crystal display for an electronic device such as a mobile phone efficiently illuminated, liquid crystal display or large signboard performance can be improved, and manufacture simple as well as a convenient and very convenience in use advantageously in use, the numerous like can be provided at low cost it is intended to achieve the industrial advantages.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic perspective view of an example of a light guide plate of the present invention.

It is a [2] An example enlarged sectional view of the light guide plate of the present invention shown in FIG.

FIG. 3 is an enlarged fragmentary cross-sectional view of a variation of an example of a light guide plate of the present invention.

A [4] a schematic perspective view for explaining an example of a manufacturing process of the light guide plate of the present invention shown in FIG.

It is [5] a schematic perspective view showing the surface of the heat roll used in the production process shown in FIG.

6 is a schematic perspective view of an embodiment of a light guide plate of the present invention.

7 is a schematic rear view of a second embodiment of a light guide plate of the present invention.

[8] Ru principal part AA enlarged sectional view der of the second embodiment of the light guide plate of the present invention shown in FIG.

[9] Ru essential part BB enlarged sectional view der of the second embodiment of the light guide plate of the present invention shown in FIG.

FIG. 10 is a schematic rear view of a third embodiment of a light guide plate of the present invention.

11 is a principal part AA enlarged sectional view of a third embodiment of a light guide plate of the present invention shown in FIG. 10.

Is [12] main part BB enlarged sectional view of a third embodiment of a light guide plate of the present invention shown in FIG. 10.

13 is a schematic rear view of a fourth embodiment of a light guide plate of the present invention.

14 is a principal part AA enlarged sectional view of a fourth embodiment of a light guide plate of the present invention shown in FIG. 13.

Is [15] main part BB enlarged sectional view of a fourth embodiment of a light guide plate of the present invention shown in FIG. 13.圆 16 is a schematic rear view of a fifth embodiment of a light guide plate of the present invention.

圆 17 is a principal part AA enlarged sectional view of a fifth embodiment of a light guide plate of the present invention shown in FIG. 16.

圆 18 is a schematic rear view of a sixth embodiment of the light guide plate of the present invention.

圆 19 is a sixth principal part AA enlarged sectional view of an embodiment of a light guide plate of the present invention shown in FIG. 18.

圆 20 is a sixth main part BB enlarged sectional view of an embodiment of a light guide plate of the present invention shown in FIG. 18.

圆 21 is a schematic rear view of a seventh embodiment of a light guide plate of the present invention.

圆 22 is a main part A- A enlarged sectional view of a seventh embodiment of a light guide plate of the present invention shown in FIG. 21.

圆 23 is a schematic rear view of an eighth embodiment of a light guide plate of the present invention.

圆 24 is a eighth main part AA enlarged sectional view of an embodiment of a light guide plate of the present invention shown in FIG. 23.

圆 25 is a schematic rear view of a ninth embodiment of a light guide plate of the present invention.

圆 26 is a main part A- A enlarged sectional view of a ninth embodiment of a light guide plate of the present invention shown in FIG. 25.

圆 27 is a conceptual diagram of a high-frequency myogenic machine that can be used to produce the light guide plate of the present invention.

圆 28 is a conceptual diagram of a high-frequency point-like form machine which can be used to produce the light guide plate of the present invention.

FIG. 29 is a conceptual view of an ultrasonic myogenic machine that can be used to produce the light guide plate of the present invention.

[FIG. 30] is a conceptual view of an ultrasonic point-like form machine which can be used to produce the light guide plate of the present invention.

圆 31 is a schematic perspective view showing an example of a device using a light guide plate of the present invention.

圆 32 is a schematic sectional view showing an example of a conventional light guide plate body.

With reference to the best mode [0019] drawings for carrying out the invention will be described the preferred embodiments of the present invention. Figure 1 is a schematic perspective view of an example of the light guide plate body. Light plate member of the present embodiment, an acrylic 榭脂 plate 10 is translucent plate having a light-transmitting property, a plurality of recesses 3 provided on the back, each recess 3 has said acrylic 榭脂are formed are arranged in a matrix on the rear side of the plate 10. In the present embodiment, the recess 3 has a hole having a respective quadrangular pyramid shape, open its 4 pyramid bottom at the back of the acrylic 榭脂 plate 10, 4 pyramid apexes of acrylic 榭脂 plate 1 It is formed to a depth that is located in the middle of the 0 of thickness! Ru.

[0020] Acrylic 榭脂 plate 10, the light transmittance of the high! A ヽ thermoplastic synthetic resin, In its contact with the present embodiment is a rectangular flat plate. The thickness of the acrylic 榭脂 plate 10, it is possible to select any one according to the function and purpose, a light emitting diode or a cold cathode tube as an example to be placed on the end surface of the acrylic 榭脂 plate 10 it is also possible to choose depending on the size. Further, in the present embodiment, although the acrylic 榭脂 plate and flat, may have a shape having a curved surface such as a cylindrical, partially or may be a structure such that the thickness of the plate is changed . Further, an acrylic 榭脂 plate 10 is of a light transparent high! Been adopted by intends ヽ thermoplastic synthetic resin and ヽ Ru ヽ, it is also possible to use other highly light transmissive thermoplastic synthetic resin .

[0021] a plurality of recesses 3 is a hole for each of which reflects light incident from the end surface 11 of the acrylic 榭脂 plate 10 on the surface 8 side of the § acrylic 榭脂 plate 10, in this embodiment, It is holes having a substantially quadrangular pyramid shape. The peripheral portion of each recess 3, the back nine ゝ peripheral projecting portion 4 formed so as to al protrude acrylic 榭脂 plate 10 is provided, Ru. The peripheral projecting portion 4, when forming the recess 3, the pyramidal projections formed on the surface of the heat roll or heat plate raised when pressurized to the back 9 of the acrylic 榭脂 plate 10 a part is once hardened portion at the peripheral portion of its pressurization melted with heat and cooled to the recesses 3. This peripheral ridge 4, light traveling in the in-plane direction of the back 9 of the acrylic 榭脂 plate 10 is diffused, it improves the light extraction efficiency at around the recess 3. Each recess 3, since it has the required inclined surface, but reflects the light incident from the end face 11 of the acrylic 榭脂 plate 10 on the surface 8 side of the efficiency good tool acrylic 榭脂 plate 10, the end face the plane peripheral projecting portion 4 like also enable light traveling in the direction of the back 9 of the acrylic 榭脂 plate 10 etc. irregular reflection in the recess 3 with the incident light from the 11 to the surface 8 side of the acrylic 榭脂 plate 10 It will be reflected. [0022] The size of the plurality of recesses 3 are the diameter, for example, 0. 05mm- 0. 3mm of the back side, the pitch between adjacent concave portions 3 are for example 0. 1mm- 2. Omm, more preferably 0. 3 mm - it is possible to set the 0. 7 mm. The vertex angle side of the recess 3 may be obtuse 120 degrees by good instrument opposition in are also possible force slightly smaller 60- 70 degrees than be about 90 degrees as a corner cube. Further, at the periphery and Hisashi Naka portion of acrylic 榭脂 plate 10, the size and pitch of the plurality of recesses 3, shape, direction, light in the center portion of the acrylic 榭脂 plate 10 For example good tool be changed and the depth since intensity is scarce, it may also be arranged a plurality of recesses 3 relatively densely.

[0023] The plurality of recesses 3 for reflecting the surface 8 side of such an acrylic 榭脂 plate 10, the light source 12 can be effectively arranged in such relatively narrow space cold cathode triode or LED array direct light out morphism is or reflected by the reflecting surface 13 is incident on the end face 11 of the acrylic 榭脂 plate 10, and reflects light that enters the plurality of recesses 3 in its peripheral projecting portion 4, the liquid crystal display It would shed light efficiently by uniformly high brightness over the entire surface of the entire or large billboards.

[0024] not limited to the shape of the pyramid-shaped recess 3 shown in FIG. 2, the light guide plate body of the present invention may take a conical or prismatic, cylindrical, and various shapes such as truncated cone or truncated pyramid, for example, as in a modification shown in FIG. 3, the recess 23 of the truncated cone shapes it is also possible Rukoto be plurally formed on the rear surface 26 of the acrylic 榭脂 plate 20. It is in the form of a recess 23 having such a truncated cone shape, the heat roll young properly is formed on the surface of the heat plate head flat pyramidal and cylindrical protrusions on the back 26 of an acrylic 榭脂 plate 20 pressurized can that form the peripheral projecting portion 24 simultaneously with the recess 23 of the desired shape. Further, the shape such as a cone or a pyramid, or may be as peak portion is eccentric. Further, a plurality of recesses 3 are all or a shape or size need to have some of Nag differ the same shape may be such as arranging pattern of combined recesses 3 of a plurality of shape .

[0025] FIG. 4 shows an example of a method of manufacturing the light guide plate of the present embodiment by a hot roll, an acrylic 榭脂 plate 16 is supported on the movable table 15 on the base 17. The acrylic 榭脂 plate 16 side the rear side as a final product is fixed on the movable table 15 so that the upper, thermally in pressure-contact with the acrylic 榭脂 plate 16 on the mobile table 15 roll 18 is provided. The hot roll 18 is intended to pressurize ranging heated acrylic 榭脂 plate 16, as shown in FIG. 5, the projections 19 corresponding to the shape of the recess formed is formed. When the hot roll 18 is pressed against the acrylic 榭脂 plate 16, the projections 19 bite as sticking to the surface of the acrylic 榭脂 plate 16, at the periphery of each recess by melting and cooled with an increase in temperature at the surface so that the peripheral projecting portion hardens.

[0026] Next, FIG. 6 shows an example of arranging light sources 38, 38 on both end faces 37, 37 of the translucent plate member 31 such as an acrylic 榭脂 plate having a light-translucent forming a light-transmitting plate material 31 provided with a plurality of recessed portion 35 which is deeper than recess in the central portion of the back provided with a large number of concave portions having a recess over the entire surface of the back 32 of the sexual plate 31 are doing. Source 38, the light from 38, in part directly, both end surfaces 37, 37 is incident on, and both end faces 37 is partially reflected by the reflection surface 40 of the support plate 41, 41 of the translucent plate member 31 and is incident on the 37.

[0027] The light issued from the light source 38, 38 by energizing the light source 38, 38 is introduced into the light-transmitting plate member 31 having translucency, light introduced into the light-transmitting plate material 31 is permeable with advances in different directions by a large number of concave portions 36 having a back 32 recess provided 〖this light-plate body 31, the light-transmitting plate material 31 light out of the surface of the translucent plate member 31 der connexion which emits light without unevenness, television, monitor of a personal computer, it is extremely suitable as Bruno backlight of liquid crystal displays for electronic devices such as mobile phones. Having thereon a light source such as a cold cathode tube or LED light source to introduce light to the reflective surface 40, 40 with a support plate 41, 41 on the transparent plate 31 as a light source 38, provided on the supporting plate 41 reflective surface 40 is to improve Ri by the performance of a liquid crystal display with a higher brightness of the light guide plate to facilitate the introduction of light into the translucent plate member 31.

[0028] FIGS. 7 to 9 are views showing a second embodiment of the present invention, a schematic rear view of a second embodiment of a light guide plate of FIG. 7 is the invention, FIG. 8 7 to a main part AA enlarged sectional view of a second embodiment of a light guide plate of the present invention shown, main section BB expansion of the second embodiment of the light guide plate of the present invention in which FIG. 9 is shown in FIG. 7 it is a cross-sectional view. Te second embodiment odor of the present invention, a number of concave portions having a provided a recess over the entire surface of the back 32 of the translucent plate member 36 is formed in the large number of waves streak 34, 39 It is those, numerous deep recess 35 in a substantially centric portion of the plurality of recesses forming a net-like are also formed.

[0029] Such a large number of waves muscle shape in the second embodiment, then a third in the embodiment form state multiplicity of inclined, parallel inclined stripes and fourth embodiments described in many similar to the orthogonal parallel orthogonal streaks, which are formed by myogenic instrument heated through Rutotomoni heating a plurality of projecting cutting edge, such as a sawtooth, the formed by the the contact with the back of a large number of protruding cutting edge light-transmitting plate of Sujigata forming device, it is further moved to either the back of the large number of projecting cutting portions or translucent plate of myogenic instrument translucent plate member of a number of predetermined points on the back of molten cutting to translucent plate member present wave streak, a large number of inclined parallel inclined streak, a large number of orthogonal parallel orthogonal streak convenient by also in the range can be formed.

[0030] In addition, a number of deep depressions 35 the required locations of the light-transmitting plate material 36 by rotating moving deep recess forming the roller body which is heated through the electrothermal by melt cutting translucent plate member the back 3 2 of the required locations of 36 by melt cutting is capable to easily form a large number of deep recess 35 on the back surface of the light transmitting plate 36.

[0031] FIGS. 10 to 12 are views showing a third embodiment of the present invention, a schematic rear view of a third embodiment of a light guide plate of FIG. 10 is the present invention, FIG 11 FIG a main part AA enlarged sectional view of a third embodiment of a light guide plate of the present invention shown in 10, main section BB of the second embodiment of the light guide plate of the present invention in which FIG. 12 is shown in FIG. 10 enlarged cross-sectional views. Third In the embodiment, parallel inclined muscle number of concave portions having a recess portion provided over the entire surface of the back 52 of the translucent plate member 56 is inclined in the large number of which have cross-section of the present invention It is those formed with Jo 54, 57, a large number of deep recess 55 in a substantially central portion of the plurality of concave portions forming a reticulated by parallel inclined streak 54, 57 are also formed. Illustrated Do of the light-transmitting plate material 56, the light incident from the end face, is reflected by the number of these recesses, it is reflected with high efficiency from the surface 51 of the translucent plate member 56, and higher brightness further improve the performance of the liquid crystal display.

[0032] FIGS. 13 to 15 are views showing a fourth embodiment of the present invention, FIG 13 is a schematic rear view of a fourth embodiment of a light guide plate of the present invention, FIG 14 FIG 13 is a principal part AA enlarged sectional view of a fourth embodiment of a light guide plate of the present invention shown in a fragmentary portion BB of a fourth embodiment of a light guide plate of the present invention in which FIG. 15 is shown in FIG. 13 enlarged cross-sectional views. Fourth In the embodiment, parallel inclined muscle number of concave portions having a recess portion provided over the entire surface of the back 62 of the translucent plate member 66 is inclined in the large number of which have cross-section of the present invention are those formed with Jo 64, 67, a large number of deep recess 65 in a substantially central portion of the plurality of concave portions forming the following connexion lattice form intersections 60 are also formed by parallel inclined streak 64, 67. The light incident end surface force (not shown) of the light-transmitting plate material 66 is reflected by the number of these recesses, it is reflected with high efficiency from the surface 61 of the translucent plate member 66, and higher brightness LCD further improve the performance of the display

[0033] FIGS. 16 and 17 are views showing a fifth embodiment of the present invention, FIG 16 is a schematic rear view of a fifth embodiment of a light guide plate of the present invention, FIG. 17 FIG. 16 is a main part AA enlarged sectional view of a fifth embodiment of a light guide plate of the present invention shown in. Oite to a fifth embodiment of the present invention are those numerous concave portion with a provided a recess over the entire surface of the back 72 of the light transmitting plate 76 is formed by a number of point-like concave portion 74 , and the polarization connexion numerous deep recess 75 in a substantially central portion of the translucent plate member 76 is also formed. Light end surface force also enters not shown of the light-transmitting plate 76 is reflected by the concave portion of the shape of these many points, it is reflected with high efficiency from the surface 71 of the translucent plate member 76, higher brightness to further improve the performance of the liquid crystal display is.

[0034] wherein a number of point-like recesses in the fifth embodiment intended to form a number of collision out punctate forming tool heated via the heating provided with a cutting edge on the peripheral wall of the roller body , formation of its abuts the back 72 of the light-plate body 76 Toru multiple protruding cutting edge of the point forming device, further rotation of the roller body of the point forming device on the back 72 of the translucent plate member 76 the required portion of the translucent plate member by causing moved by melt cutting is capable to easily form a large number of point-like recesses on the back 72 of the translucent plate member 76. Especially spacing of multiple point-like concave portions formed on the back surface 72 of the roller body circumference light-permeable by using a different from the point-like formed device a number of multiple protruding cutting edge provided on the wall plate member 76 in which it is possible to obtain the difference with the light guide plate.

[0035] FIGS. 18 to 20 are views showing a sixth embodiment of the present invention, FIG 18 is a schematic rear view showing a sixth embodiment of the light guide plate of the present invention, FIG. 19 a sixth principal part AA enlarged sectional view of an embodiment of a light guide plate of the present invention shown in FIG. 18, FIG. 20 is a partial of a sixth embodiment of the present onset light of the light guide plate body shown in FIG. 18 parts is a BB enlarged sectional view. In a sixth embodiment of the present invention, a number of concave portions having a provided a recess over the entire surface of the back 82 of the translucent plate member 86 is provided by the high frequency processing or ultrasonic processing, as described below number is obtained by forming a wave streak 84, 89 of the present. Light also enters the end surface force (not shown) of the light-transmitting plate 86 is reflected by the concave portion of a number of these waves streak 84, 89, is reflected with high efficiency from the front surface 81 of the translucent plate member 86, further improve the performance of the liquid crystal display with higher luminance.

[0036] Figure 21 through 22 are views showing a seventh embodiment of the present invention, a schematic rear view of a seventh embodiment of a light guide plate of FIG. 21 is the present invention, FIG. 22 FIG. 21 is a seventh principal part AA enlarged sectional view of an embodiment of a light guide plate of the present invention shown in. Parallel the Oite to a seventh embodiment of the present invention, in which a large number of concave portions having a recess portion provided over the entire surface of the back 92 of the translucent plate member 96 is inclined in the large number of which have cross-section in the inclined streak 94, 97 are those formed by the high frequency processing or ultrasonic processing, the substantially central portion of the plurality of concave portions forming a reticulated by parallel inclined streak 94, 97, and the third embodiment Unlike a number of deep recessed portion has not been made form. Light also enters the end surface force (not shown) of the light-transmitting plate material 96 is reflected by the number of these recesses, it is reflected with high efficiency from the surface 91 of the translucent plate member 96, a liquid crystal display with higher brightness performance further improve the.

[0037] FIGS. 23 to 24 are views showing an eighth embodiment of the present invention, FIG 23 is a schematic rear view of an eighth embodiment of a light guide plate of the present invention, Figure 24 is Figure 23 is a main part AA enlarged sectional view of an eighth embodiment of a light guide plate of the present invention shown in. Parallel the Oite to an eighth embodiment of the present invention, in which a large number of concave portions having a recess portion provided over the entire surface of the back 102 of the light-transmitting plate 106 is inclined in the large number of which have cross-section in the inclined streak 104, 107 are those formed by the high frequency processing or ultrasonic processing, forms a parallel gradient streak 104, following connexion grid pattern of exchange satin 100 by 107. End surface force (not shown) of the light-transmitting plate member 106 is also the incident light is reflected in a number of these recesses, anti Isa is with high efficiency from the surface 101 of the light-transmitting plate 106, and higher brightness LCD further improve the performance of the display.

[0038] FIGS. 25 and 26 are views showing a ninth embodiment of the present invention, FIG 25 is a schematic rear view of a ninth embodiment of a light guide plate of the present invention, FIG 26 FIG a ninth principal part AA enlarged sectional view of an embodiment of a light guide plate of the present invention shown in 25. Oite to a ninth embodiment of the present invention, a concave portion with a provided a recess over the entire surface of the back 112 of the translucent plate member 116, the high frequency processing of a plurality of point-like recesses 114, 113 or those formed by ultrasonic machining. Light also enters the end surface force (not shown) of the light-transmitting plate 116 is reflected by the concave portion of the plurality of point-like, is reflected with high efficiency from the surface 111 of the light-transmitting plate 116, and a higher brightness further improve the performance of the liquid crystal display Te.

[0039] FIGS. 27 to 30 are respectively conceptual views that of machines that can be used to produce the light guide plate of the present invention, FIG. 27 is a conceptual diagram of a high frequency muscle formation processing machine, FIG. 28 is a conceptual view of a high-frequency point-like form processing machine, FIG. 29 is a conceptual view of an ultrasonic myogenic mosquito 卩工 machine, FIG. 30 is a conceptual view of an ultrasonic point-like form processing machine.

[0040] The second embodiment in a large number of waves streak, the third embodiment in a large number of inclined parallel inclined streak, parallel many in the book orthogonal to the fourth embodiment orthogonal streak one of the devices that form, but is a high frequency myogenesis machine 135 provided with a plurality of projecting cutting edge 1 34 to the flat plate 133, such as a saw blade shape shown in FIG. 27. During its formation, a plurality of projecting cutting edge 134 of the high-frequency myogenic machine 135 to the back 132 of the translucent plate member 131 abuts further rear 132 of the protruding edge portion 134 or the translucent plate member 131, Zureka the required portion of the light-transmitting plate member 131 by moving to melt cutting a number on the back 132 of the light-transmitting plate 131 present wave streak, a large number of inclined parallel inclined streak, large number orthogonal those that can be conveniently form the parallel orthogonal stripes.

[0041] In addition, one of the apparatus for forming a fifth embodiment many point-like recesses in the the high-frequency point-shaped having a plurality of protruding cutting edges 144 on the peripheral wall of the roller body 145 shown in FIG. 28 is the formation Carolina Koki 146. Contact with the rear surface 143 of the plurality of projecting cutting edge 144 of the support base 141 is supported on the light-transmitting plate body 142 of the high-frequency point-like form processing machine 146 at the time of its formation, a higher-frequency-spotted forming force 卩工 machine a number of points of the roller body 145 of 146 to the back 14 3 of the light-transmitting plate body 142 a required portion by melting the cutting of the light-transmitting plate body 142 of the back 143 on the rotary movement is to be a light-transmitting plate 142 are those that can be easily formed a Jo recess, Toru by and a roller body 145 of the peripheral high-frequency point-like form processing machine 1 which is different from the number of number of protruding cutting edge 144 provided on the wall surface 46 those capable of interval number of point-like concave portions formed on the back surface 143 of the light-plate body 142 to obtain a difference to the light guide plate.

[0042] The second embodiment in a large number of waves streak, the third embodiment in a large number of inclined parallel inclined streak, parallel many in the book orthogonal to the fourth embodiment orthogonal streak one addition of another apparatus for shape formed, but ultrasonic myogenesis machine 135 provided with a plurality of projecting cutting edge 154 to the flat plate 153, such as a saw blade shape shown in FIG. 29. During its formation, a plurality of projecting cutting edge 154 of the ultrasonic myogenic machine 155 to the back 152 of the light-transmitting plate body 151 abuts, further one of the back 152 of the protruding edge portion 154 or the translucent plate member 151 the required portion of the translucent plate member 151 by moving to melt cutting a number on the back 152 of the light-transmitting plate body 151 this wave streak, a large number of inclined parallel inclined streak, large number orthogonal the, parallel orthogonal stripes are those that can be formed into a simple and convenient.

[0043] In addition, one of the apparatus for forming a large number of point-like recesses in the fifth embodiment, ultrasonic point having a large number of protruding cutting edges 164 on the peripheral wall of the roller body 165 shown in FIG. 30 is Jo formation Carolina Koki 166. Its formation during contact with the rear surface 163 of the plurality of projecting cutting edge 164 of the support base 161 translucent plate member 162 which is supported on the ultrasonic punctate forming machine 166 further ultrasonic wave point-like formation force 卩工the required portion of the roller body 165 of the light-transmitting plate 162 of the back 163 on the rotary movement is to be a light-transmitting plate 162 of the machine 166 by melt cutting many on the back 16 3 of the light-transmitting plate 162 are those that can be easily formed punctiform concave portion, and the use of ultrasonic point-like form processing machine 1 66 and different in number of number of protruding cutting edge 164 provided on the peripheral wall surface of the roller body 165 in those capable interval of a number of point-like concave portions formed on the rear surface 163 of the light-transmitting plate 162 to obtain a difference to the light guide plate.

[0044] Therefore, many light this wave streak emitted from the light source of a cold cathode officer or LED light source or the like with a shall be able to promote the use effect using a light guide plate according to the place of use , a large number of inclined parallel inclined streak, many present perpendicular, parallel orthogonal streaks, are those which are introduced without plaques light guide plate via the plurality of point-like recesses and a number of deep recess.

[0045] Next, referring to FIG. 31, device will be described using the light guide plate of the present invention.

First, the light guide plate member, an acrylic 榭脂 plate 210 is translucent plate having a light-transmitting property, a plurality of recesses 203 provided on the back, each recess 203 is the acrylic 榭脂 plate are formed are arranged in a matrix on the rear side of the 210. In the present embodiment, the recess 203 has a hole having a quadrangular pyramid shape, respectively, opened the 4-sided pyramid at the bottom is at the rear 211 of § click Lil 榭脂 plate 210, quadrangular pyramid apexes of acrylic 榭It is formed to a depth that is located in the middle of the thickness of the fat plate 210. The peripheral portion of each recess 203, that have peripheral projecting portion 204 is provided which is formed so as to protrude from the back surface 211 of the acrylic 榭 fat plate 210. The peripheral projecting portion 204, when forming the recess 203, comprising a pyramidal projections formed on the surface of the heat roll or heat plate raised when pressurized to the back 211 of acrylic 榭脂 plate 210 it is a partial, over 且 a hardened portion at the peripheral portion of its pressurization melted with heat and cooled to the recess 203. This peripheral projecting portion 204, light traveling in the in-plane direction of the back 211 of acrylic 榭脂 plate 210 is diffused, it improves the light extraction efficiency of around the recess 203.

Reflector 212 made of a transparent synthetic resin plate so as to face the back side of such an acrylic 榭脂 plate 210 is disposed. Reflector 212 the main surface is disposed spaced apart by a predetermined distance D1 so as to be parallel to the back 211 of acrylic 榭脂 plate 210. In this manner, when providing the spaced apart to reflector 212 required interval D1 has the advantage that the reflection efficiency is higher than when adhering the reflecting plate 212. Here the distance D1 is set to an interval of, for example, about 2-7 mm. The surface 214 of the reflector 212, a plurality of protrusions 213 are formed, the spacing of the plurality of protrusions 213 is narrowed in the central portion 215, it is designed to be widened in the peripheral portion 216. In other words, closely arranged plurality of projections 213 in the central portion 215, by disposing a plurality of projections 213 at the peripheral portion 2 16 back to the crude, the light intensity for the light source power is also far disposed normally around it is possible to increase the reflection efficiency at weak tend central portion 215. As means for adjusting the density of the convex portion of the Hisashi Naka portion and a peripheral portion, it is possible to change the height or size of each convex portion of the center and periphery. Moreover, little reflection plate used having a curved surface, a reflector may be Unishi by slightly closer to the light guide plate side the distance between the central area of ​​the light guide plate as compared with the periphery of the.

Claims

The scope of the claims
Has a translucent plate having a [I] translucency and a plurality of recesses formed on the rear surface of the light-transmissive plate member, the peripheral portion of the recess formed so as to protrude from the rear a light guide plate body and having a peripheral projecting portion which is.
[2] The light-transmitting plate member is made of polymeric material, said that peripheral projecting portion is simultaneously formed by thermally pressing the back side of the front KiToruhikari resistance plate body during the formation of the recess light guide plate of claim 1, wherein.
[3] wherein the light-transmitting plate body made of a polymeric material is tabular, the heat pressing is 請 Motomeko 2, wherein a is performed by plates or rolls for heating process having a collision force light guide plate body.
[4] electrically to the light-transmitting plate material made of a polymer material having a light-transmitting property, characterized in that a plurality of concave portions having a recess over the entire surface of the back surface of the transparent plate body light plate body.
[5] The light-transmitting plate body light guide plate of claim 4, wherein that you provided with a plurality of deep recess which is deeper than recess in the central portion of the back of the.
[6] the concave portion, a plurality of waves streak, a plurality of inclined parallel inclined stripes having a cross section
And a plurality of orthogonal parallel orthogonal streak was the having a cross-section, the light guide plate of claim 4, wherein the including those formed with or deviation.
[7] the concave portion, a light guide plate of claim 4, wherein the including those formed by a plurality of point-like recesses.
[8] the concave portion is a high frequency or you characterized in that it is formed by machining using ultrasonic claim 4 light guide plate body according.
[9] The light-transmitting plate material according to claim 1 or claim 4 light guide plate, wherein the provided light source for adjacent the end face on the end face for introducing light into the light guide plate body body.
[10] The light source light guide plate of claim 9, wherein the composed LED array or a cold-cathode tube force.
[II] and the light guide plate member according to claim 1, further comprising a reflection plate disposed on a back surface of the light guide plate body, that is prior Symbol reflector is provided at a distance from the rear surface of the light guide plate body device using the light guide plate body characterized. And claim 1 of the light guide plate body, and a reflecting plate disposed on the rear surface of the light guide plate body, the surface of the front Symbol reflector, a plurality of convex portions are formed, the center of the reflection plate parts are using the light guide plate member, wherein the convex portion to the peripheral portion Te ratio base are arranged densely device.
PCT/JP2004/019534 2004-03-22 2004-12-27 Light guide plate WO2005090855A1 (en)

Priority Applications (6)

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JP2004082231 2004-03-22
JP2004-082231 2004-03-22
JP2004250981 2004-08-30
JP2004-250981 2004-08-30
JP2004-250967 2004-08-30
JP2004250967 2004-08-30

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JP2007115567A (en) * 2005-10-21 2007-05-10 Takehisa Saito Irradiation fixture
DE202006017445U1 (en) * 2006-11-14 2007-08-02 Demmel Ag Light module for rear-illuminated lettering, comprises light-conducting plate with two surfaces facing each other, connecting lateral surface and source of light, light or air chambers form recesses in region of spaced adhesive frames
JP2011023331A (en) * 2009-07-16 2011-02-03 Lg Display Co Ltd Backlight unit
WO2011093172A1 (en) * 2010-01-29 2011-08-04 日本ゼオン株式会社 Light-guiding plate and lighting device
EP2426394A1 (en) * 2009-04-27 2012-03-07 S.K.G. Co., Ltd. Method for manufacturing a light guide plate
JP5634611B1 (en) * 2012-12-21 2014-12-03 株式会社エス・ケー・ジー The method for manufacturing a light guide member and the guide member
CN104748071A (en) * 2013-12-31 2015-07-01 奇美实业股份有限公司 Light guide plate for illumination and illuminating lamp
JP2015130321A (en) * 2013-05-08 2015-07-16 奇美實業股▲分▼有限公司 Light guide plate for illumination, and luminaire with the same
US9557472B2 (en) 2012-12-21 2017-01-31 S.K.G. Co., Ltd. Light guide member and method of manufacturing light guide member

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JP2007115567A (en) * 2005-10-21 2007-05-10 Takehisa Saito Irradiation fixture
JP4551858B2 (en) * 2005-10-21 2010-09-29 雄久 斉藤 Irradiation device
DE202006017445U1 (en) * 2006-11-14 2007-08-02 Demmel Ag Light module for rear-illuminated lettering, comprises light-conducting plate with two surfaces facing each other, connecting lateral surface and source of light, light or air chambers form recesses in region of spaced adhesive frames
EP2426394A1 (en) * 2009-04-27 2012-03-07 S.K.G. Co., Ltd. Method for manufacturing a light guide plate
EP2426394A4 (en) * 2009-04-27 2014-08-20 Skg Co Ltd Method for manufacturing a light guide plate
JP2011023331A (en) * 2009-07-16 2011-02-03 Lg Display Co Ltd Backlight unit
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WO2011093172A1 (en) * 2010-01-29 2011-08-04 日本ゼオン株式会社 Light-guiding plate and lighting device
JP5634611B1 (en) * 2012-12-21 2014-12-03 株式会社エス・ケー・ジー The method for manufacturing a light guide member and the guide member
US9557472B2 (en) 2012-12-21 2017-01-31 S.K.G. Co., Ltd. Light guide member and method of manufacturing light guide member
JP2015130321A (en) * 2013-05-08 2015-07-16 奇美實業股▲分▼有限公司 Light guide plate for illumination, and luminaire with the same
CN104748071A (en) * 2013-12-31 2015-07-01 奇美实业股份有限公司 Light guide plate for illumination and illuminating lamp

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JP4524282B2 (en) 2010-08-11 grant

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