WO2004055583A1 - Front-lit display system - Google Patents

Front-lit display system

Info

Publication number
WO2004055583A1
WO2004055583A1 PCT/CN2002/000895 CN0200895W WO2004055583A1 WO 2004055583 A1 WO2004055583 A1 WO 2004055583A1 CN 0200895 W CN0200895 W CN 0200895W WO 2004055583 A1 WO2004055583 A1 WO 2004055583A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
optical
light
substrate
surface
portion
Prior art date
Application number
PCT/CN2002/000895
Other languages
French (fr)
Chinese (zh)
Inventor
Yijun He
Original Assignee
Quanta Display Inc.
Quanta Display Japan Inc.
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.)
Filing date
Publication date

Links

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
    • G02B6/0013Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031Reflecting element, sheet or layer
    • 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
    • G02B6/0038Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • 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
    • G02B6/0045Means 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 by shaping at least a portion of the light guide
    • G02B6/0046Tapered light guide, e.g. wedge-shaped light guide
    • G02B6/0048Tapered light guide, e.g. wedge-shaped light guide with stepwise taper
    • 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
    • G02B6/0058Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/0061Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
    • 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
    • G02B6/0066Light guides specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068Arrangements of plural sources, e.g. multi-colour light sources
    • 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
    • G02B6/0066Light guides specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/007Incandescent lamp or gas discharge lamp
    • G02B6/0071Incandescent lamp or gas discharge lamp with elongated shape, e.g. tube
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices 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
    • G02F1/01Devices 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
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of optical devices, e.g. polarisers, reflectors or illuminating devices, with the cell
    • G02F1/1336Illuminating devices
    • G02F2001/133616Front illuminating devices

Abstract

This invention relates to an optical structure of front-lit modular, comprising of a display, an optical sheet, a reflector and a light source. It's characterized that there is plurality of parallel ridges in the one of surface of the optical sheet to reflect light ray down into display. Thus, improving effectiveness of light source and eveness of light ray and enhancing viewing angle of display are realized.

Description

TECHNICAL FIELD front light optical module means

The present invention relates to a simple and effective fast with a structure which is suitable for front-light optical mechanism module structure, the use of the unique design of the optical substrate, the most popular applications solve optoelectronic industry production, such as a liquid crystal display, image quality uniform brightness, the effective use of the light source, and the viewing angle is increased.

Background technique

Figure 1A is an enlarged view of the optical substrate prior known optical module design is the intermediate portion, the side edge portion is gradually reduced by the thickness, it is between a stepped pattern toward an intermediate portion of reduced thickness, a pitch (pitch) of approximately 20 to 30 microns (μ πι), the height of each level is lowered about 5 to 10 microns (m); FIG. 1B is a front light of a known optical module substrate schematic front optical thickness of the entire optical module mechanism about 5-6 inches.

Japanese Patent Publication No. 21883/2001 2001 January 26 open, reflective LCD and mini electronic information products, is to specify a method to achieve a reflective LCD thin lightweight, reflective liquid crystal display, in two between the glass substrate opposed to the one-sided, a polarizing plate, a retardation plate, a diffusion plate, a color film, a transparent electrode, the liquid crystal layer, are sequentially arranged, close to a glass substrate and a viewer has an end portion of the concavo-convex unevenness, with to provide a front light (front light) of the light guide function, a user close to the substrate comprising a front light, and a light source disposed near the substrate side of the user.

Japanese Patent Publication No. 00017/1990 on January 5, 1990 the disclosure, and March 26, 1990 disclosed in Japanese Patent Publication No. 84618/1990, describes a planar light source unit, which comprises an optical conduit (light guide pope) a first element having a light incident surface (light incident surface), - a light emitting surface, the light-emitting surface perpendicular to the light incident surface, a reflecting surface and the light emission surface positive, and with a seed light extraction mechanisms (light extraction mechanism) is formed, the light extraction mechanism also known as light extractor (light extractor), a light source disposed at the opposite end of the light conduit; controlling an optical sheet (light control sheet) to a second element, having one kind of a prism array (prism array), a prism array disposed adjacent to the emitting surface of the light guide, and has a triangular prism (prism), and arranged such that the top end toward the light emitting surface of the prism light guide, wherein the composition of any of the light guide generating line (generating line) formed by the prism, arranged almost parallel to the light emitting source, and a reflective sheet (reflecting sheet), or a reflective surface (reflecting surface), disposed adjacent to the light The light reflecting surface of the tube; on March 26, 1990 disclosed references, Japanese Patent Publication No. 84618/1990 also discloses a surface uniformly atomized treatment (surface-roughening treatment) to the light emitting element of the first surface (light emitting surface); two references thereto, are diverging light in a specific direction, however, does not meet the actual optical characteristics, such as: homogeneity satisfactory fails to obtain a light emitting surface emits light (see, in Japanese Patent Publication No. 18879/1994 January 28, 1994 disclosed); in particular, the planar light source device not existing, moderately provide a wide viewing angle, for a planar light source unit (planar light source unit), a liquid crystal display as the sheet on the monitor television.

Four disadvantage of known construction, generally have the following according to: a lack of brightness in the room, two, limited viewing angle, three, the lack of surface luminance, four single lamp (lamp).

Disclosure of the Invention

In view of the present inventors, it has a structure to provide a simple and rapid effectiveness, which is a structure suitable for an optical module front light mechanism, the use of the unique design of the optical substrate, solve most popular optoelectronic industry production applications, such as a liquid crystal display, image quality uniform brightness, the effective use of the light source, and the viewing angle is increased.

The present invention provides a simple and effective structure has fast, which is applied to the structure before the optical mechanism of the optical module, the optical substrate by using a unique design, the most popular applications solve optoelectronic industry production, liquid crystal display and the like, so that brightness uniformity quality, effective use of the light source and widen the viewing angle, has three main purposes: first, the present invention is by ridges on the optical design of the substrate (ridge) configuration, causes the light exiting from the optical substrate, departing from the original in the direction of the optical substrate is carried out, and has a larger diffusion range, for enhancing the size of angle;

Second, the present invention is configured by troughs (Valley) on the optical design of the substrate, causes the side of the light source by the optical substrate emitted into the interior of the optical substrate, encounters the surface portion of the valley, the whole internal reflection (internal total reflection), so that light is reflected down to the reflector possible to enhance the uniformity of the emitted light away from the display;

Third, the present invention can effectively utilize light emitted from the light source, and the display is not excessive increase in volume and weight.

BRIEF DESCRIPTION OF DRAWINGS

Figure 1A is an enlarged view of the optical substrate prior known optical module design.

FIG 1B is a known optical substrate is a schematic front light module.

2 is a structure of a first embodiment of an optical module according to FIG optical mechanism enlarged front explanatory view of the present invention.

3 front structure of the optical module of the present invention, an optical mechanism of the second embodiment of the structure of FIG.

FIG 4 before the optical module of the optical mechanism of the present invention, the structure of a second embodiment of an enlarged explanatory view of the structure.

Figure 5 configuration of the optical module of the optical mechanism of the front explanatory view of a second embodiment of the present invention.

FIG 6 is a light emitting principle of the optical mechanism of the front module of the second embodiment of the invention described in FIG.

Appearance of the optical module of the optical mechanism of Figure 7 prior to the second embodiment of the present invention.

Example preferred embodiments of the invention,

First embodiment

According to the present invention, FIG 2 is a front optical module of the optical mechanism of the first embodiment described in FIG enlarged configuration; optical structure of the optical mechanism of the front module of the first embodiment of the present invention consists essentially of the following components: a display (not shown in FIG. 2), by a plurality of display pixels (pixels) is composed, and the pixel includes a distal end and a back major surface (back major surface); - an optical substrate, an optical substrate having two major opposing surfaces (two major opposing surfaces), wherein a surface 12 is smooth, and the abutment position in the main surface of the front of the display (front major surface); and adjacent to the back of the display end main surface (back major surface) of the position of a reflector 3, the reflector 3 is provided ; a light source 51, light source 51 for introducing the optical substrate 1 7, wherein the optical beam 7 from one side of the substrate 1, and enters the optical substrate 1, and because the valley portion 141a of the face surface, due to total internal reflection (internal total reflection), downwardly reflected as ray 71, through the optical substrate 1, followed by a display, and for the three reflected by the reflector back through the display, light entering The substrate 1, after exiting the optical substrate, whereby the substrate 1 to enhance the brightness of the optical display 1.

The present invention is characterized in that: another surface of the optical substrate 141 having a plurality of parallel valley portions 141a, 141b, 141c, 141d, 141e, 141f and ridges 143a, 143b 143c, 145a 145b, 145c,.. spacing Pl 145d, 145e, wherein the valley portion 141a and the valleys 141b having a constant pitch, indicated in FIG. 2, the valley portions and valley portions 141b

141c having a constant pitch, the pitch P2 2 shown in FIG, etc., whereby light emitted by the light source 51 side of the optical substrate 1, 9, into the interior of the substrate 1 of the optical encountered valleys 141a, 141b, 141c of the surface, an internal total reflection, the light rays 7, the light becomes sequentially, 71, 73, 75, reflected down to the reflector 3 can enhance the uniformity of light emission from Jian display, then, from the optical group 1 sheet of light 71 will pass the optical substrate 1, a ridge portion 145b, the direction from the originally performed in the optical substrate 1, a greater range of diffusion, departing from the originally performed in the direction of the optical substrate 1, promotional the size of angle.

The optical substrate 1 in the ridge portion 143a, a first surface 143al of a multi-fold surface, a second surface with a composition of multi-fold surface 143a2, and adjacent ridges 143a, 143b, 143c, constituting a ridge group (ridge group) 143, while the group of ridges 143, 145, such as a group of ridges 143, 145, may be occupied by a valley portion 141a, a third surface 149 or occupied, and the third surface 149 parallel to the optical system smooth surface of the substrate 112.

Description of the ridge structure and function 143a, since the ridge portion 143a having two facing surfaces, a first surface of a multi-off surface and the second surface 143al folded over one surface 143a2, respectively provided to be separated from the optical substrate 1 the light from the originally performed in the direction of the optical substrate 1, and has a larger diffusion range, to enhance the size of angle.

DESCRIPTION valley portion 141a of the configuration and function, since the valley portions (Valley) is wedge-shaped surface 141a, which consists of a fourth surface 141al, a fifth surface and a sixth surface 141a3 141a2 composition, from the fourth surface of the optical base 141al side of the sheet 1, the light-entering the optical substrate 1 is 7, for total internal reflection so that light 7 reflected light 71 becomes downward, reaching the reflector 3, on the fifth surface 141a2 from the other side of the optical substrate 1 , the light entering the optical substrate 1 (not represented in FIG. 2), so that for total internal reflection of the downwardly reflected light reaches the reflector 3; since the valley portions 141a, 141b, 141c, 141d, 141e, 141f, which from both sides to the middle, the longitudinal depth incremented; reason for this design is because the light is emitted from the both sides in the middle, such that the intermediate portion of the valley portion 141c, 141d, during which total internal reflection surface, the reflected light energy, and the valley portions can both side portions 141a, 141f, making its total internal reflection surface, the reflected light energy uniformly, so that the design portion of the intermediate valley portion 141c, 141d, both in depth than the trough portion portions 141a, 141f longitudinal Deep, so that both sides of the intercepting portion valleys 141a, 141f, to which the surface is not intercepted by the light source 51 or 53 to the intermediate optical substrate 1, the energy of the emitted light, so that reflected downwardly further, sixth surface 141a3 lines parallel to the surface 12, primarily for ease of adjusting the pitch size, but also for convenience of manufacturing and processing.

Further, the light source 51 on, in terms of position 53, may be provided on both sides of the optical substrate, the light source 511 comprises at least one light fixture (light tube) 511 and a reflector screen (reflective chimney) 513 0 and the light source 53 comprises at least one light emitting lamp 531 and a reflection shade 533, is noteworthy that, although Example 51 denotes a light source to a light fixture 511, and 531 denotes a light source a light emitting tube 53, but is not limited to the first embodiment of the present invention using a single light fixture 511, 513, a plurality of light fixture 511, 513 in the first embodiment of the present invention is still possible.

Figure 2 shows the valleys 141a and valleys 141b having a constant pitch Pl, the valleys

141b 141c and the valley portion having a constant pitch P2, and the like. The first embodiment of the invention the spacing between 50 and 70 microns (μ m).

Second embodiment

FIG 3 is a structure of the optical mechanism of the optical module of the second embodiment before explaining the structure of the present invention. FIG 4 is a front optical module according to the present invention means the structure of an optical configuration of a second embodiment of the enlarged FIG. Before the second embodiment of the invention the optical structure of the optical module mechanism, mainly composed of the following components:

A display (not shown in FIG. 3 and FIG. 4), a plurality of display pixels (pixels) is composed, and the pixel includes a distal end and a back major surface (back major surface); - an optical substrate, an optical substrate 1 having two major opposing surfaces, wherein one surface 12 is smooth and contiguous positions in the main surface of the front of the monitor; position of a reflector 3, the reflector 3 disposed adjacent to the back of the display end of the major surface; a light source 51, light source 51 with the light introduced to the optical substrate 1 7, wherein the optical beam 7 from one side of the substrate 1, and enters the optical substrate 1, and because the valley portion 141a of the face surface, due to total internal reflection, anti-down, shoot, be light 71, the optical substrate 1, followed by a display, and for the three reflected by the reflector back through the display, to enter the optical substrate 1, after exiting the optical substrate 1, whereby the optical substrate 1 to enhance the brightness of the display.

The present invention is characterized in that: another surface of the optical substrate 1 14, having a plurality of parallel valley portions 141a, 141b, 141c, 141d, 141e, 141f and ridges 143a, 143b, 143c, 145a, 145b, 145c, spacing Pl 145d, 145e, wherein the valley portion 141a and the valleys 141b having a constant pitch, indicated in FIG. 3, the valley portions and valley portions 141b

141c having a constant pitch, the pitch P2 3 shown in FIG, etc., whereby light emitted by the light source 51 side of the optical substrate 1, 9, into the interior of the substrate 1 of the optical encountered valleys 141a, 141b. 141c surface for total internal reflection, the light rays 7, sequentially, the light becomes 71, 73, 75, reflected downward, reaching the reflector 3, the light emitted away from the display capable of enhancing the uniformity, then, from the optical group 1 sheet of light 71 will pass the optical substrate 1, a ridge portion 145b, the direction from the originally performed in the optical substrate 1, a greater range of diffusion, departing from the originally performed in the direction of the optical substrate 1, promotional the size of angle.

The ridge portion 143a of the optical substrate 1, which is a second surface 143al and 143a2 consists of a first surface and adjacent ridges 143a, 143b, 143c constitute a group of ridge 143, and ridge group 143, 145 , groups such as ridges 143, 145, may be occupied by a valley portion 141a, a third surface 149 or occupied, and the third surface 149 is parallel to the substrate surface 121 is optically smooth.

Ridges 143a described structure and function, since the ridge portion 143a having two facing surfaces, a first surface and a second surface 143al 143a2, to provide a self light exiting the optical substrate 1, originally from the optical substrate, respectively 1 performed in a direction, and has a larger diffusion range, for enhancing the size of angle.

The valley portion 141a of structure and function described, since the valley portion 141a by a fourth surface and a fifth surface 141a2 Mlal composition, is from the fourth surface 141al side of the optical substrate 1, the substrate 1 enters the optical light 7, for total internal reflection so that light 7 reflected light 71 becomes downward, reaching the reflector 3, is a fifth surface 141a2 from the other side of the optical substrate 1, the light entering the optical substrate 1 (not in FIG. 3 shows in FIG. 4), so that for total internal reflection of the downwardly reflected light reaches the reflector 3; since the valley portions 141a, 141b, 141c, 141d, 141e, 141f, by both sides in the middle, incremented longitudinal depth; reason for this design is because the light is emitted from the both sides in the middle, such that the intermediate portion of the valley portion 141c, 141d, making its total internal reflection surface, the reflection of light energy, and can be both valley portions 141a, 141f of the unit, making its total internal reflection surface, the reflected light energy uniformly, so the design of the intermediate portion of the valley portion 141c, 141d, than the depth of the valley portion 141a side portions, 141f depth length, intercepting portion in order to both Portions 141a, 141f, to which the surface is not intercepted by the light source 51 or 53 to the intermediate optical substrate 1, the energy of the emitted light, so as to be further reflected downward.

Further, the light source 51 on, in terms of position 53, may be provided on both sides of the optical substrate 1, a light source 51 comprising at least one light emitting lamp 511 and a reflection shade 513, and the light source 53 comprises at least one light emitting lamp 531 and a reflection shade 533, is noteworthy that, although the second embodiment of the present invention showing the light source 51 to a light fixture 511, and 531 denotes a light source a light emitting tube 53, but are not limited to using a single light fixture 511, 513, a plurality of light fixture 511, 513 in the second embodiment of the present invention is still possible.

Valley portions 141a and valley portions in FIG. 3 and FIG. 4 shows 141b having a constant pitch

Pl, and the valley portion 141c and the valley portion 141b having a constant pitch P2, and the like, embodiments of the present invention a second embodiment of a pitch of between 50 and 70 microns (μ m).

FIG 5 is a configuration explanatory view of a second embodiment of the optical module before the optical mechanism of the present invention; valley portion 141a on the intermediate structure is symmetrical to the front portion of the optical module of the optical means; valley portions 141a, 141b, 141c, Hid, 141e, 141f , by both sides in the middle, the longitudinal depth incremented. The reason for this design is that because the light emitted from the sides to the center line, such that the intermediate portion of the valley portion 141c, 141d, making its total internal reflection surface, the reflection of light energy, and the valley portions can both portions 141a, 141f, making its total internal reflection surface, the reflected light energy uniformly, so the design portion of the intermediate valley portion 141c, 141d, than the depth of the valley portion 141a side portions, 141f depth length to intercept both valley portions 141a, 141f of the unit, to which the surface is not intercepted by the light source 51 or 53 to the intermediate optical substrate 1, the light emission energy, so further reflected downward.

FIG 6 is a light emitting principle of the optical mechanism of the front module to a second embodiment of the present invention will be described in FIG. A light source 51, light source 51 for introducing the optical substrate 1 7, wherein the optical beam 7 from one side of the substrate 1, and enters the optical substrate 1, and because the valley portion 141a of the face surface, due to total internal reflection, downwardly reflected as ray 71, through the optical substrate 1, followed by a display, is reflected by the reflector 3, back through the display, entering the optical substrate 1, a portion of the reflected light after 71, will pass optical ridges of the substrate 1 after 143a, departing from the originally performed in the direction of the optical substrate 1, a greater range of diffusion, departing from the originally performed in the direction of the optical substrate 1 to enhance the size of angle.

FIG 7 is an external view of the optical mechanism of the optical module of the second embodiment of the present invention, the front, can be seen from Figure 7 the ridge valleys of the optical substrate, the intermediate portion is symmetrical to the front optical mechanism of the optical module, from both sides of the symmetrically arranged intermediate.

The above disclosed description and drawings are merely preferred embodiments of the present invention only, those changes for non-limiting embodiments of the present invention, almost all skilled in the art to which it is under this spirit of the invention, made or modified , it is claimed to be encompassed within the scope of the following claims of the present invention.

Industrial Applicability

Simple by the present invention quickly have effective structure, which is applied to the front of the optical module of the optical mechanism configuration using the optical substrate unique design can solve the most popular applications optoelectronic industry production, liquid crystal display and the like, so that brightness uniformity of its quality, and effective use of the light source wider viewing angle.

Claims

Rights request
1. The front structure of the optical mechanism of the optical module, comprising:
A display which is composed of a plurality of pixels, the pixel includes a front end and the back end of the major surface;
An optical substrate, the optical substrate having two major opposing surfaces, wherein a smooth surface, and a position adjacent to the main surface of the front of the display;
A reflector, the reflector is disposed at a position adjacent to the main surface of the back side of the display; and
A light source for introducing light to the optical substrate, wherein light enters the optical substrate from both sides of the optical substrate, and because the valley portions of the face surface, and total internal reflection, downwardly reflected by the optical substrate, followed by the display and reflected by the reflector back through the display, to enter the optical substrate, after leaving the optical substrate, whereby the optical substrate to strengthen the luminance of the display;
Wherein:
Other surface of the optical substrate having a plurality of parallel ridges and valleys, wherein the valley portion and the valley portion having a constant pitch; Accordingly, the light emitted by the light source on both sides of the optical substrate, the optical access to the group inner sheet, the surface of the trough portion is encountered, for total internal reflection, so that light is reflected downward, reaching the reflector, enhance the uniformity of emission of the light leaving the display; Next, light leaving the optical substrate, after passing through the ridge portion of the optical substrate, is carried out in the original direction of the optical substrate, the greater the diffusion range, enhance the size of angle.
2. The structure of the front light module of the optical means as claimed in claim 1, wherein each ridge portion by a first surface and a second surface consisting of adjacent ridges constituting a ridge group and the ridges between the groups, occupied by a third surface portion or a trough.
3. The structure of the front light module optical mechanism according to claim 1, wherein the first surface and the second surface, providing the light exiting from the optical substrate, originally performed in the direction departing from the optical substrate, and with a larger spread scope for enhancing the size of angle.
4. The structure of optical means before the optical module according to claim 1, wherein the third surface is parallel to the smooth surface of the optical substrate.
The front structure of the optical module of the optical means according to claim 1, wherein the valley portion of a fourth surface and a fifth surface composition, from the fourth side of the optical surface of a substrate, which enters the optical light of the substrate, for total internal reflection, so that light is reflected downward, reaching the reflector; from the fifth surface to the other side of the optical substrate, the light entering the optical substrate, the internal total reflection therefore, so that the light is reflected downward, reaching the reflector.
6. The structure of the optical means before the optical module according to claim 1, wherein the valley portion from both sides to the middle, the longitudinal depth incremented.
7. The structure of an optical module front light mechanism according to claim 1, wherein the light source may be provided on both sides of the optical substrate, comprising: at least one light emitting lamp and a reflector screen.
8. The structure of an optical module front light mechanism according to claim 1, wherein the spacing is between 50 and 70 microns.
PCT/CN2002/000895 2002-12-17 2002-12-17 Front-lit display system WO2004055583A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2002/000895 WO2004055583A1 (en) 2002-12-17 2002-12-17 Front-lit display system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2002/000895 WO2004055583A1 (en) 2002-12-17 2002-12-17 Front-lit display system

Publications (1)

Publication Number Publication Date
WO2004055583A1 true true WO2004055583A1 (en) 2004-07-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
WO (1) WO2004055583A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5394255A (en) * 1992-01-27 1995-02-28 Sekisui Kagaku Kogyo Kabushiki Kaisha Liquid crystal display using a plurality of light adjusting sheets angled at 5 degrees or more
US5608550A (en) * 1994-06-24 1997-03-04 Minnesota Mining And Manufacturing Company Front-lit liquid crystal display having brightness enhancing film with microridges which directs light through the display to a reflector
CN1327166A (en) * 2000-06-07 2001-12-19 三星电子株式会社 Lighting method, back light device in liquid crystal display and liquid crystal display

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5394255A (en) * 1992-01-27 1995-02-28 Sekisui Kagaku Kogyo Kabushiki Kaisha Liquid crystal display using a plurality of light adjusting sheets angled at 5 degrees or more
US5608550A (en) * 1994-06-24 1997-03-04 Minnesota Mining And Manufacturing Company Front-lit liquid crystal display having brightness enhancing film with microridges which directs light through the display to a reflector
CN1327166A (en) * 2000-06-07 2001-12-19 三星电子株式会社 Lighting method, back light device in liquid crystal display and liquid crystal display

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