KR20150039500A - A hybrid light guide panel with incorcorated led lenses - Google Patents

A hybrid light guide panel with incorcorated led lenses Download PDF

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Publication number
KR20150039500A
KR20150039500A KR20130118143A KR20130118143A KR20150039500A KR 20150039500 A KR20150039500 A KR 20150039500A KR 20130118143 A KR20130118143 A KR 20130118143A KR 20130118143 A KR20130118143 A KR 20130118143A KR 20150039500 A KR20150039500 A KR 20150039500A
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KR
South Korea
Prior art keywords
light guide
led
guide plate
hybrid
leds
Prior art date
Application number
KR20130118143A
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Korean (ko)
Inventor
정영옥
권새봄
우주성
Original Assignee
에이테크솔루션(주)
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Application filed by 에이테크솔루션(주) filed Critical 에이테크솔루션(주)
Priority to KR20130118143A priority Critical patent/KR20150039500A/en
Publication of KR20150039500A publication Critical patent/KR20150039500A/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
    • G02B6/122—Basic optical elements, e.g. light-guiding paths
    • G02B6/125—Bends, branchings or intersections
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
    • H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
    • H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
    • H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Power Engineering (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Computer Hardware Design (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The present invention relates to a hybrid light guide panel in which LEDs are vertically arranged and having integrated LED lenses corresponding to the LEDs. The hybrid light guide panel following the invention is the hybrid light guide panel placed on the LEDs arranged flatly on the panel, includes flat panel type light guide part and LED lenses located on each LED, wherein the light guide part and LED lenses are manufactured in all-in-one type. The hybrid light guide panel is characterized to be installed on the LEDs arranged vertically.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hybrid light guide plate (LED light guide plate)

The present invention relates to a light guide plate, and more particularly, to a light guide plate, in which LEDs are arranged in a direct downward direction, that is, LEDs are arranged on a plane on a substrate, and LED lenses corresponding to the respective LEDs are integrated into a light guide plate and a hybrid light guide plate.

2. Description of the Related Art In recent years, liquid crystal displays (LCDs) have been widely used in various display devices such as monitors and TVs in order to improve the sharpness of the screen and reduce the thickness of the device. Since such a liquid crystal display can not emit light by itself, a backlight unit (BLU) having a separate light source is required. Conventionally, a cold cathode fluorescent lamp (CCFL) has been used as a light source used in such a backlight unit. However, due to the structure of a cold cathode fluorescent lamp, there are limitations in manufacturing a thin display device, Light Emitting Diode (LED), which is a light source, is widely used as a light source.

The backlight unit has a direct type and an edge type in accordance with the manner in which the LEDs are arranged. The direct type is a type in which the LEDs are arranged in a planar manner below the backlight unit. In the edge type, Are disposed at the edge, that is, the edge, of the backlight unit light guide plate. In the case of the direct type, since the LEDs are disposed at the lower part of the backlight unit, there is a limit in reducing the thickness of the backlight unit, that is, the thickness of the liquid crystal display device. In the case of the edge type, However, the number of LEDs to be used can increase, and light emitted from the LEDs is scattered and scattered through the light guide plate. However, there is a difficulty in uniformizing the brightness of the light.

Also, in the case of the direct-type type, in order to reduce the number of LEDs required and to improve the light orientation, the LED lenses are mounted on the respective LEDs. A large amount of LED lenses are installed on the respective LEDs. The manufacturing period is lengthened, and some of the LED lenses may not be aligned with the corresponding LEDs correctly, or the LED lens may be detached from the position.

On the other hand, LED has been widely used for lighting in recent years due to its low power consumption and long life span, and the use of LED lamps is increasing its use range. There have been various attempts to reduce the thickness of the product by securing the uniformity of luminance in the backlight unit and the LED illumination lamp as described above.

An object of the present invention is to provide a light guide plate capable of solving the above problems, making the brightness of light more uniform, and slimming the product thickness.

Another object of the present invention is to provide a light guide plate capable of producing a product with a shorter production period and less cost.

According to an aspect of the present invention, there is provided a hybrid light guide plate in which LED lenses are integrated, the hybrid light guide plate being disposed on LEDs arranged in a plane on a substrate, the hybrid light guide plate comprising: And an LED lens disposed on each of the LEDs, wherein the light guide and the LED lenses are integrally formed, and the hybrid light guide plate is disposed on the LEDs arranged in a direct-type .

The light guide portion and the LED lenses may be integrally formed by injection molding, and the hybrid light guide plate may be sealingly installed on the substrate on which the LEDs are arranged.

The hybrid light guide plate may be used for a backlight unit of a liquid crystal display device, a flat panel LED lighting, or the like.

Meanwhile, the LED lens may be a top emitting type, a side emitting type, or a hybride type LED lens which is a mixture of a top emitter type and a side emitter type. And a micro optical pattern may be formed on a side portion of the hybrid type LED lens.

The following effects can be obtained by utilizing the hybrid light guide plate in which the LED lenses according to the present invention are integrated.

- Reduce the number of LEDs required for products such as backlight units and LED flat panel lights. For example, in the 32-inch LED TV, when the LEDs are arranged in the edge shape, about 70 LEDs are required, whereas when the LEDs are directly arranged using the hybrid light guide plate according to the present invention, about 32 LEDs are required .

- By arranging the LEDs directly under the hybrid light guide plate according to the present invention, it is possible to improve the uniformity of luminance compared to the existing direct type or edge type, to prevent the occurrence of stains on the screen and to obtain a clearer screen .

- By using the hybrid light guide plate according to the present invention, the thickness of the product can be made thinner than the existing direct type.

In the hybrid light guide plate according to the present invention, since the LED lenses are integrally integrated, it is possible to shorten the manufacturing period of the product such as the backlight unit and the LED flat panel lamp, and to reduce the manufacturing cost, and the LED lens is shifted from the corresponding LED It is possible to prevent the lens from being displaced from its position.

1 is a plan view of a hybrid light guide plate in which LED lenses are integrated according to a preferred embodiment of the present invention.
2A is a cross-sectional view taken along the line I-I 'in FIG.
2B is a partial enlarged view of the circle "A" portion of FIG. 2A.
3A is a schematic cross-sectional view of a top-emitting type LED lens.
3B is a schematic cross-sectional view of a side-emitting type LED lens.
3C is a schematic cross-sectional view of an LED lens of a hybrid type.

Hereinafter, a heat-insulating core for injection molding according to the present invention will be described in detail with reference to the accompanying drawings, which are illustrative and do not limit the present invention.

1 is a plan view of a hybrid light guide plate 1 in which LED lenses 20 are integrated, FIG. 2A is a cross-sectional view taken along the line I 'of FIG. 1, and FIG. -I ', and FIG. 2B is a partial enlarged view of the circle "A" portion of FIG. 2A.

As shown in the drawing, a hybrid light guide plate 1 in which LED lenses 20 are integrated, according to an embodiment of the present invention, includes a hybrid 32 provided on LEDs 31 arranged in a plane on a substrate 32, A light guide plate (1) comprising a light guide portion (10) having a flat plate shape and an LED lens (20) positioned directly above each of the LEDs (31) arranged on a substrate (32) The lens 10 and the LED 20 are integrally formed. For example, the resin such as PMMA, PC, PS and the like may be melted and integrally formed by one injection molding. If it is necessary to fabricate the light guiding portion 10 and the LED lenses 20 using resins of different materials or resins of different colors, they may be integrally manufactured using a dual injection method. The hybrid light guide plate 1, which is integrally manufactured, can be provided on the LEDs 31 arranged in a direct-lowered shape to constitute, for example, a backlight unit or an LED flat plate lamp. In FIG. 1, 24 LED lenses 20 are integrated into the hybrid light guide plate 1, which is an example, and the quantity thereof will vary depending on the type of product and the like.

For the sake of reference, the light guide plate 1 is referred to as a hybrid light guide plate in this specification because a light guide plate is provided in the case of an edge type in a general backlight unit and a light guide plate is not usually provided in a direct type. It is desired that the light guide plate 1 is referred to as a hybrid light guide plate 1 because the light guide plate 1 is integrally formed with the LED lenses 20 and is disposed on the LEDs 31 arranged in a direct lowered shape.

The LED substrate 32 is a substrate in the form of a bar or a plate and the LEDs 31 are arranged on the LED substrate 31. The hybrid light guide plate 1 is hermetically installed on the substrate to form the hybrid light guide plate 1 The LEDs 31 can be protected from the external environment.

Such a hybrid light guide plate 1 may be utilized for a backlight unit used in a liquid crystal display device, an apparatus using an LED flat light or the like or other LEDs.

Various lens types may be used for the above-described LED 20, and the top emitting type described in Patent Application No. 10-2013-0101070 filed on August 26, 2013 by the present applicant, Side-emitting type or hybrid type LED lenses may be used. The above Patent Application No. 10-2013-0101070 is incorporated herein by reference. Schematic views of these types of LED lenses are shown in Figures 3A-3C, which are schematic cross-sectional views of an LED lens 21 of the top-emitting type, and Figure 3B is a side- 3C is a schematic cross-sectional view of the LED lens 23 of the hybrid type. Here, the top emission type LED 21, the side emitting type LED 22, and the hybrid type LED 23 are included in the LED 20, and reference numerals 21, 22, and 23 .

The top-emitting type LED 21 shown in FIG. 3A diffuses the light emitted from the LED 31 as shown by arrows P1, P2, and P3 in the figure and transmits the light through the diffusion plate (not shown) The side emitting type LED 22 shown in FIG. 3B can emit light emitted from the LED 31 in the direction of arrows Q1, Q2 and Q3 in the drawing, (Not shown) and a diffusing plate (not shown). The hybrid type LED 23 shown in FIG. 3C is a mixed type of a top-emitting type and a side-emitting type The light emitted from the LED 31 may be scattered and emitted as indicated by arrows R1, R2, S1, and S2 in the figure, and may be supplied to a liquid crystal panel or the like through a reflection plate or a diffusion plate. In particular, the microscopic optical pattern 23a may be formed on the inclined side surface of the hybrid type LED 23 to further improve the uniformity of brightness. As described above, the hybrid light guide plate 1 according to the present invention includes the above-described LED lenses 21 of the top-emitting type, the LED lenses 22 of the side-emitting type, or the LED lenses 23 of the hybrid type, And other types of LED lenses may be integrally formed on the hybrid light guide plate 1 according to the present invention.

By doing so, it is possible to reduce the number of LEDs required for a product such as a backlight unit or an LED flat panel lamp, improve luminance uniformity compared to the conventional direct type or edge type, Though it is possible to obtain a clear screen, the thickness of the product can be made more slimmer than the conventional direct type. In addition, since the LED lightwave plates according to the present invention are integrally integrated with each other, it is possible to shorten the production period of products such as a backlight unit and an LED flat panel lamp, reduce the manufacturing cost, and arrange the LED lenses And it is also possible to prevent the lens from being displaced from the home position.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It is to be understood that the invention is not limited to the disclosed embodiments.

1: Hybrid light guide plate 10: Light guide portion
20: Lens Lens 21: Top Emitting Lens
22: Side Emitting Type LED Lens
23: Hybrid type LED 23a: Micro optical pattern
31: LED 32: substrate

Claims (7)

A hybrid light guide plate provided on LEDs arranged in a plane on a substrate, the hybrid light guide plate comprising:
A light guide portion in the form of a flat plate: and
And an LED lens positioned above each of the LEDs,
Wherein the light guide portion and the LED lenses are integrally formed, and the hybrid light guide plate is disposed on the LEDs arranged in a direct-lowered shape.
The method according to claim 1,
Wherein the light guide portion and the LED lenses are integrally formed by injection molding.
The method according to claim 1,
Wherein the hybrid light guide plate is hermetically installed on the substrate on which the LEDs are arranged.
The method according to claim 1,
Wherein the hybrid light guide plate is used for a backlight unit of a liquid crystal display device.
The method according to claim 1,
Wherein the hybrid light guide plate is used for a flat panel LED lighting.
The method according to claim 1,
Wherein the LED lens is of a top emitter type, a side emitter type, or a hybrid type of a combination of a top emitter type and a side emitter type.
The method according to claim 6,
And a micro optical pattern is formed on a side surface of the hybrid type LED lens.
KR20130118143A 2013-10-02 2013-10-02 A hybrid light guide panel with incorcorated led lenses KR20150039500A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109445013A (en) * 2018-12-04 2019-03-08 伟时电子股份有限公司 Direct-lighting backlight and its lens light guide plate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109445013A (en) * 2018-12-04 2019-03-08 伟时电子股份有限公司 Direct-lighting backlight and its lens light guide plate

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