TWI279627B - High luminance light guide plate - Google Patents

Abstract

The present invention provides a high luminance light guide plate formed by a sheet made of a transparent resin with high refractive index, in which one side of the light guide plate is an incident face, and the surface of the light guide plate is an emergent face. The back face of the light guide plate opposite to the emergent face is a reflective face. The light guide plate is recessed with a plurality of cells on the reflective face to form a diffusion pattern. The emergent face of the light guide plate is protruded with a plurality of diffusion points, which are distributed on the emergent face for improving the taste and homogeneity of the light guide plate. Accordingly, the production cost of the mold of the light guide plate can be reduced.

Description

I1279627 V. INSTRUCTION DESCRIPTION OF THE INVENTION (1) Technical Field The present invention relates to a surface light source which is a high-intensity light guide plate. [Prior Art] A conventional surface plate is formed, and its back pattern is used. The plate has a surface on which the diffusing light-emitting portion plate and the light-transmitting diffusion pattern in the inner light-plate of the light guide plate are closed to the light-transmitting light that is totally reflected by the light-emission. In terms of spare parts of the device, in detail, the light source surface of the main light source device is formed such that the light guide plate is directed toward the back side of the light beam and the light is directed away from the back of the light, and the light guide plate is guided. If the exit surface of the surface is smaller than the exit surface, the light guide plate is included in the light-reflecting plate, and the light-receiving portion of the light-receiving portion that is included in the light-emitting surface from the side of the chamber is guided to the light guide. The light is incident on the light plate, and the reflectance light guide plate is in the opposite direction of the light transmission plate back plate, the surface formed by the transparency of the first rate, and the light-emitting reflector plate. The internal light is emitted, and the light is transmitted. When such a surface is on, one side (which is the light exit surface) is totally reflected at the critical angle of the angle outside the reflector, and the other part is not reflected back into the light guide plate by the reflector. The reflection reduces the light guide portion and a diffusion pattern formed by the anti-resin (the light is attached to the light guide, and the light is blocked when the light guide is closed), and the light is emitted at this time. When the pattern portion is diffused, and the light emitted from the light exit surface of the light guide plate is emitted from the medium having a large refractive index to the medium having a small refractive index, the light is emitted in a direction deviating from the normal to the light exit surface. The direction along the amplitude of the light incident surface is defined as the X axis, and the direction perpendicular to the light incident surface is defined as the γ axis, which is perpendicular to the direction of the light exit surface.

1279627 V. Inventive Note (2) For the Z-axis, the light emitted from the inside of the light guide plate through the light exit surface becomes light that is substantially close to the elongated directivity pattern along the Y-axis direction, due to the effective viewing angle of the human eye. About 5. ~1 〇. It is impossible to visually perceive the emitted light outside the range of the viewing angle. Therefore, the light emitted through the light exiting surface cannot be completely received by the human eye. In this state, when viewing the day from the vertical direction (z-axis direction) of the light exiting surface The illuminating light emitted from the light guide plate is low in visibility and is not conducive to the luminous efficiency of the light-emitting portion. Therefore, the conventional surface light source device is provided with a cymbal on the light-emitting surface of the light guide plate so as to be emitted from the light-emitting surface. The light 'focuses the light toward the Z-axis direction via the cymbal, thereby improving the brightness of the light obtained by the eye. It can be seen that if the directivity pattern of the light emitted through the light exit surface is closer to the direction perpendicular to the light exit surface (z-axis direction), more lines enter the effective viewing angle of the human eye without relying on The use of the cymbal can improve the brightness of the light emitted from the light guide plate in the z-axis direction, thereby improving the luminous efficiency of the illuminating ,, and reducing the volume of the surface light source device and the manufacturing cost thereof.

In another aspect, the conventional surface light source device utilizes the emission of the light-emitting portion, and two of them are used as the light source. The light-emitting element generally has two types of a cold cathode tube (CCFL) and a light-emitting diode (LED), wherein The LED as a light source of the light source is matched with a plurality of LEDs to form a plurality of point light sources, and the point light source emits light through the internal radiation of the light, and the conventional light guide plate constitutes a (1)' view from the 2-axis direction. The folded and reflected light is parallel to the light incident surface, ..., when transmitting in the light guide plate, and when it is incident on the diffusion pattern, only a part of the light is diffused by the diffusion pattern

Page 6 1279627 V. Description of invention (3) Total reflection of light exiting surface, because there is a light-mixing distance between LEDs, it is easy to cause the light-dark bands to be separated, especially in the case of mirror-patterned light guide plates. In order to be severe, the enamel forms obvious bright lines and dark lines. 9 It is necessary to diffuse the light emitted from the light guide plate by the diffusion plate, thereby affecting the decrease of the luminance of the light emitted from the light guide 2 in the Z-axis direction, and is disadvantageous to the illuminating effect of the light-emitting portion.

Rate. X In order to solve the problem of the conventional light guide plate, the applicant of the present application has previously applied for a patent for invention of a high-luminance light guide plate, and the application number thereof is 0 94 1 295793^. For the specific technical content of the invention, please refer to the case. According to the specification, the first invention has effectively enhanced the luminance of the light emitted from the S-plate in a direction perpendicular to the light-emitting surface by the first diffusion pattern, thereby improving the luminous efficiency of the surface light source device, reducing the volume and manufacturing of the surface light source device. The cost and the light emitted from the light guide plate are evenly distributed on the light exit surface, thereby avoiding the formation of bright lines and dark lines. In order to make the molding die previously invented, it is necessary to design the specific size and distribution state of the groove pattern of the diffusion pattern, and to form a mirror mold core having a plurality of bumps on the surface, and then place the mold core into the mold as a molding reflection surface. The surface of the mold is made by using the bumps of the mold, so that when the light guide plate is produced by the injection operation, the reflection surface is distributed with a plurality of groove chambers to form a diffusion pattern, and then the test works are tested to verify whether the high brightness is indeed achieved. Without the expected effect of bright lines, if the effect is not satisfactory, the previous design and the mirror mold must be invalidated. The size and distribution of the design chamber are redesigned, and the procedures for making the mold, shooting the test, and verifying are repeated. By repeating revisions, trials, and verifications, we can get the performance of the mass production manufacturing function.

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                                                     In the production of a trial, verification, the number of precision revisions that need to be scrapped is more trial-and-error and considerable. The distribution pattern has a taste directly called taste, and the mold is produced up to twenty times. The mirror level is high, and the mirror mold makes the influence of the mold state, by adjusting the degree, sometimes In other words, the mold core, the cost of making the whole light through the light exit surface, generally speaking, the industry is on the distribution configuration state, but the groove chamber is expected to be reversed before the revision, but the cost of the mirror is also The higher the body cost and the revised version, the one time, the surface mold is high, the 'repeated' and the work time is very good. The 7^ branch is for the first invention to modify the taste, the uniformity, and the mold Π n day guard In the case of unsatisfactory problems in terms of cost and working hours, the second day of the case was rumored to actively carry out research and creation, and after the multi-party experiment, the inventor who was innovative and available for industrial use. The main object of the present invention is to provide a high-intensity light guide plate, wherein the first injection surface forms a diffusion point, and the groove arrangement of the diffusion pattern is not required to be adjusted, and the taste and uniformity can be changed, and the mold is quickly modified to reduce the mold. The manufacturing cost of the light guide plate mold. Therefore, the present invention is a high-luminance light guide plate which is a plate body formed of a high refractive index 2 transparent resin, wherein one side of the light guide plate is light, an entrance surface, and the surface of the light guide plate is a light exit surface. The light guide plate is exposed to the light

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The opposite side of the surface is a reflecting surface, and the groove chamber forms a diffusion pattern; the light guiding plate is recessed on the reflecting surface to emboss a plurality of diffusion points on the plurality of surfaces, and the diffusion points are matched with the taste and uniformity, and the light guide plate is lowered. The light guide plate is placed on the light exit surface after the light is emitted, thereby changing the manufacturing cost of the mold. [Embodiment] The specific embodiments in which the effects and the effects thereof are obtained are set forth in order to provide an understanding and recognition of the technical features and objects of the present invention. The first figure of the present invention does not form the first resin of the present invention, and the light-emitting surface and the light guiding pattern are matched with a plurality of systems according to the preferred embodiment. Preferred Embodiments of the Diffusion Point Guide, the plate light plate (10) formed by the present invention is opposite to the plate (10), and the second to the diffusion point (1 5) The light is taken out of the first picture. The second picture is the third picture, the fourth picture is the fifth picture, the sixth picture is the transparent entry of the reference rate (11) (10) Yu Guang (1 2 The structure is formed by parallel diffusion; (1 2 ) embossed, and its cross-sectional view. Partially enlarged cross-sectional view of the part of the diffusion point. The state diagram of the luminance distribution of the luminance distribution state of the light panel. The high-brightness light guide plate (10) is used to make the light guide plate (10) - the light exit surface (12) on the side, the reflective surface (13) on the back surface and the concave surface (1 3) are recessed in a plurality of the foregoing prior inventions, four figures The light guide plate (10) is a state diagram of the light-emitting surface (1 2 ) of each diffusion point (15). Figure. From the two refractive surfaces to the light, the light guide, the light exit surface, the groove chamber (14), not to be detailed, the light exit surface, the hemisphere arc, the light

1279627 V. Description of invention (6) The exit surface (1 2 ), according to the light distribution of the light guide plate (1 〇), to avoid the formation of crepe lines and dark lines, thereby improving the taste and uniformity. Reduce the manufacturing cost of the light guide plate mold. 〃, 凊 参阅 Refer to the fifth and sixth figures. When the light passes through the light exit surface (丨2), the light trajectory is guided to the surface of the diffusion point (15), and can be diffused and projected to the wide area to avoid The bright line and the dark line are formed. Therefore, in the production of the molding die of the present invention, it is not necessary to adjust the groove chamber (丨4) constituting the diffusion pattern to the state of optimum taste and uniformity, and the taste and the uniformity thereof. The degree of uniformity can only be presented as shown in the fifth figure. In the figure, L represents the bright area (Ught讦(10), D is not the dark area (Dark Area), but with the formation of the diffusion point (i5), it can be avoided. Forming bright lines and dark lines to achieve the effect of improving taste and uniformity (as shown in the sixth figure). The brightness distribution state shown in the sixth figure is that the glow system is decremented from the central part of the light guide plate to the outer circumference. The ideal taste and g uniformity can greatly reduce the number of times the mirror mold is used to form the diffusion pattern, and the number of trials is reversed. After the actual test, the distribution of the groove pattern of the diffusion pattern can be raised in the direction of the south Z-axis, and according to Determine the diffusion point by the trace of the light exiting the surface 15) The distribution state, in this way, the corpse needs to be reversed, and the mirror molds required to form about two to five molding diffusion patterns are combined with the mirror-like molds used to form the diffusion points. The mold core forms a surface of the recess as a mold surface of the shaped light exit surface to facilitate formation of the diffusion point (15) on the light exit surface when the molding guide is injected, but the surface is close to the mirror surface due to the mold core Such a mirror mold core, the spray diffusion point (15) meets the functional requirements after molding, and the precision and technical level of the mirror-like mold core is significantly lower than that of the mirror mold core, basin 1279627. 7) The cost is relatively lower than the mirror molds required to form the diffusion pattern, and the 'mirror molds can be quickly modified, which greatly saves development time'. Therefore, the present invention uses diffusion points (1 5 The formation of the product can quickly modify the taste and uniformity, so that the overall cost of the mold for manufacturing the light guide plate can be greatly reduced, and the man-hour required for mold opening can be effectively reduced. Innovative The composition can indeed fully satisfy the pre-emption and purpose. It has not been seen before the application, and it is in line with the invention patent's 'love to apply in accordance with the law'. It is still prudently reviewed and completed as soon as possible.

Page 11 1279627 Brief description of the drawing [Simplified description of the drawing] The first figure is the preferred basket of the present invention - the section of the m仫筮一回贝 & example shows a section, the month of the diffusion point #姑4 The third figure is a partial release of the present invention. The m~m example of the spread point distribution of the Musi four-figure system. The second figure in the fifth part of the diffusion point does not form a diffusion point. The brightness of the light guide plate of the large-sized view is the brightness distribution of the preferred embodiment of the present invention. [Main component symbol description] > Light guide plate (10) Light incident surface (11) P reflective surface ( 13) Cutaway view of the chamber (14). State diagram. 〇 State diagram. Sad picture. Light exit surface (12) diffusion point (1 5 )

Claims (1)

Sixth, the patent application scope 1 · A high-intensity light guide plate, which is a plate body formed by a transparent resin of south refractive index, wherein one side of the light guide plate is a light incident surface, and the surface of the light guide plate is light-emitting a surface of the light guide plate opposite to the back surface of the light guide plate is a reflective surface, the light guide plate is recessed in the plurality of groove chambers to form a diffusion pattern on the reflective surface; ~ the light guide plate embosses a plurality of diffusion points on the light exit surface, each The diffusion point is disposed on the light exit surface to improve the taste and uniformity, and to reduce the manufacturing cost of the light guide plate mold. 2. The high-intensity light guide plate according to item 1 of the patent application scope, wherein the diffusion point is a hemispherical arc. Page 13