CN112802393B - Backlight module - Google Patents

Backlight module Download PDF

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Publication number
CN112802393B
CN112802393B CN202011606988.8A CN202011606988A CN112802393B CN 112802393 B CN112802393 B CN 112802393B CN 202011606988 A CN202011606988 A CN 202011606988A CN 112802393 B CN112802393 B CN 112802393B
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CN
China
Prior art keywords
light
light guide
backlight module
guide member
display
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Active
Application number
CN202011606988.8A
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Chinese (zh)
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CN112802393A (en
Inventor
李尹婷
杨朝闵
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AU Optronics Corp
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AU Optronics Corp
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Publication of CN112802393A publication Critical patent/CN112802393A/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051—Diffusing sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • 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

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Planar Illumination Modules (AREA)

Abstract

A backlight module comprises a frame, a light emitting unit, a light guide member and a diffusion plate. The frame has a base and side walls, the base and side walls being connected. The light-emitting unit is arranged on the bottom plate and emits light. The light guide piece is arranged on the side wall and provided with at least one light incident surface. The diffusion plate is arranged on the light guide member and is close to the side wall, the diffusion plate, the bottom plate and the light guide member jointly define a light mixing space, and light rays are incident on the light incident surface and are guided to the light mixing space.

Description

Backlight module
Technical Field
The backlight module meets the requirements of a narrow-frame display through the arrangement of the light guide piece.
Background
Nowadays, in the research of a narrow frame display, the narrow frame display is a display with extremely narrow frame of a screen, and the display area of a display area is increased by utilizing the configuration of fusion of the screen and the frame, so that the display area occupies a proportion of the whole appearance, and an integrated visual effect is presented.
In the prior art, the iron frame is bent, one side of the iron frame supports the diffusion plate, the other side of the iron frame bears the backlight source, two sides of the iron frame are connected through inclined planes, and the thickness of the whole display is increased due to the bending of the iron frame so that the requirement of the narrow-frame display cannot be met. How to solve the disease nodes becomes the problem to be solved.
In view of the foregoing, the present inventors have conceived and devised a backlight module to solve the foregoing drawbacks of the prior art, thereby enhancing industrial implementation and utilization.
Disclosure of Invention
In view of the above-mentioned problems, an objective of the present invention is to provide a backlight module for solving the problems of the prior art.
In view of the above, the present invention provides a backlight module, which includes a frame, a light emitting unit, a light guide member, and a diffusion plate. The frame has a base and side walls, the base and side walls being connected. The light-emitting unit is arranged on the bottom plate and emits light. The light guide piece is arranged on the side wall and provided with at least one light incident surface. The diffusion plate is arranged on the light guide member and is close to the side wall, the diffusion plate, the bottom plate and the light guide member jointly define a light mixing space, and light rays are incident on the light incident surface and are guided to the light mixing space.
In an embodiment of the invention, the light incident surface and the side edge of the light guide member have an inclination angle.
In the embodiment of the invention, the number of the light incident surfaces is a plurality of, and the plurality of light incident surfaces intersect with each other.
In an embodiment of the invention, the light guide member is located above the light emitting unit, and the light emitting unit and the light guide member are spaced apart from each other, and light is perpendicularly incident to one of the light incident surfaces.
In an embodiment of the present invention, the present invention further includes a reflective sheet disposed between the light emitting unit and the bottom plate, the reflective sheet extending to the sidewall, and a portion of the reflective sheet being located between the light guide and the sidewall.
In an embodiment of the invention, a glue layer is arranged between the light guide member and the reflecting sheet.
In an embodiment of the invention, the light guide comprises a plurality of light guide units.
In an embodiment of the invention, the backlight module is applied to a display, and the light guide member or the light guide units are disposed at a side of the display.
In an embodiment of the invention, the light guide member or the plurality of light guide units are disposed on at least two sides of the display.
The backlight module provided by the invention accords with the trend of light and thin by arranging the light guide piece, and meets the requirements of a narrow-frame display.
Drawings
Fig. 1 is a configuration diagram of a backlight module according to a first embodiment of the present invention.
Fig. 2 is a configuration diagram of a backlight module according to a second embodiment of the invention.
Fig. 3 is a configuration diagram of a backlight module according to a third embodiment of the invention.
Fig. 4 is a configuration diagram of a backlight module according to a fourth embodiment of the present invention.
Fig. 5 is a configuration diagram of a first embodiment of the present invention applied to a display.
Fig. 6 is a configuration diagram of a second embodiment of the present invention applied to a display.
Fig. 7 is a configuration diagram of a third embodiment of the present invention applied to a display.
Fig. 8 is a configuration diagram of a fourth embodiment of the present invention applied to a display.
Fig. 9 is a configuration diagram of a fifth embodiment of the present invention applied to a display.
Reference numerals illustrate:
10: frame
11: bottom plate
12: side wall
20: light-emitting unit
30. 30A, 30B, 30C, 30D: light guide
31. 31A: light guide unit
40: diffusion plate
50: reflection sheet
60: optical film set
70: display unit
80: adhesive layer
D: spacing of
DS: display device
I1: first light incident surface
I2: a second light incident surface
And I3: third light incident surface
And I4: fourth light incident surface
And I5: fifth light incident surface
L: light ray
MS: light mixing space
θ: inclination angle
Detailed Description
The advantages, features and technical approaches to the present invention will be more readily understood from the following more detailed description of the exemplary embodiments and the accompanying drawings, and the invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed to provide those skilled in the art with a thorough and complete understanding of the scope of the present invention, and the present invention will only be defined by the appended claims.
It will be understood that, although the terms "first," "second," etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Accordingly, the terms "first element," "first component," "first region," "first layer," and/or "first portion" discussed below may be termed "second element," "second component," "second region," "second layer," and/or "second portion" without departing from the spirit and scope of the present invention.
Furthermore, the terms "comprises," "comprising," and/or "includes" specify the presence of stated features, regions, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, and/or groups thereof.
Unless defined otherwise, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a definition that is consistent with their meaning in the context of the relevant art and the present invention and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Please refer to fig. 1, which is a configuration diagram of a first embodiment of a backlight module according to the present invention, and is a cross-sectional view of a side of a display device. As shown in fig. 1, the backlight module of the present invention includes a frame 10, a light emitting unit 20, a light guide 30, and a diffusion plate 40. The frame 10 has a bottom plate 11 and side walls 12, and the bottom plate 11 and the side walls 12 are connected. The light emitting unit 20 is disposed on the base plate 11 and emits light L. The light guide member 30 is disposed on the sidewall 12 and has a first light incident surface I1 and a second light incident surface I2. The diffusion plate 40 is disposed on the light guide member 30 and is adjacent to the sidewall 12, and the diffusion plate 40, the bottom plate 11 and the light guide member 30 together define a light mixing space MS, and the light L is incident on the first light incident surface I1 and is guided to the light mixing space MS.
The number of the light emitting units 20 is plural, and the light emitting units 20 may be horizontal light emitting diodes, flip-chip light emitting diodes, vertical light emitting diodes or other electronic devices, which are not limited to the scope of the present invention. The first light incident surface I1 and the second light incident surface I2 intersect each other as shown in fig. 1, and the cross-sectional shape of the light guide member 30 is square, that is, the first light incident surface I1 and the second light incident surface I2 are perpendicular to each other, and the other two sides of the light guide member 30 are adjacent to the glue layer 80 and the diffusion plate 40 respectively; the light guide 30 is transparent (it has high transmittance in the visible light range), and the material of the light guide 30 may include polydimethylsiloxane (polydimethyl siloxane, PDMS), thermoplastic elastomer (thermoplastic elastomers), polyolefin (polyolefin), polyamide (polyamide), polyisobutylene (polyisobutene), and polyurethane (polyurethane), but may be other materials, without limiting the scope of the present invention.
In this embodiment, the backlight module of the present invention further includes a reflective sheet 50, an optical film set 60, a display unit 70, and an adhesive layer 80. The reflective sheet 50 is disposed between the light emitting unit 20 and the bottom plate 11, the reflective sheet 50 extends to the side wall 12, a portion of the reflective sheet 50 is disposed between the light guide member 30 and the side wall 12, a glue layer 80 is disposed between the reflective sheet 50 and the light guide member 30, and one side of the light guide member 30 is adhered to the reflective sheet 50 through the glue layer 80, so that the light guide member 30 is in a suspended state. The material of the glue layer 80 includes at least one of phenolic resin, urea formaldehyde resin, melamine formaldehyde resin, polyvinyl acetate resin, polyethylene-acetic acid resin, polyacrylic resin, polyurethane, epoxy resin, hot melt adhesive, and mixtures thereof. The optical film assembly 60 is used for adjusting the light rays L coming out of the light mixing space MS. The display unit 70 displays a screen according to signals of the gate driving circuit and the data line driving circuit.
For example, the light L is emitted from the light emitting unit 20 to the first light incident surface I1, the light L penetrates the first light incident surface I1 and travels to the reflective sheet 50, the penetrated light L is partially reflected to the light mixing space MS, the penetrated light L is partially reflected to the diffusion plate 40, and the diffusion plate 40 receives the light L exiting from the light mixing space MS and the light L reflected from the reflective sheet 50.
Please refer to fig. 2, which is a configuration diagram of a second embodiment of the backlight module of the present invention, which is a cross-sectional view of a side of the backlight module of the present invention applied to a display. As shown in fig. 2, the backlight module of the present invention includes a frame 10, a light emitting unit 20, a light guide 30 and a diffusion plate 40, which are similar to those of the first embodiment, and the description of the similarities will not be repeated herein, but the second embodiment of the present invention is different from the first embodiment in that: the light guide 30 is located above the light emitting unit 20, and the light emitting unit 20 and the light guide 30 are spaced apart by a distance D, and the light is perpendicularly incident on the second light incident surface I2 and enters the diffusion plate 40.
Please refer to fig. 3, which is a configuration diagram of a third embodiment of the backlight module of the present invention, which is a cross-sectional view of a side of a display device. As shown in fig. 3, the backlight module of the present invention includes a frame 10, a light emitting unit 20, a light guiding member 30A and a diffusion plate 40, which are disposed in the same manner as those of the first embodiment, and the similarities will not be described again, but the third embodiment of the present invention is different from the first embodiment in that: the cross-section of the light guide member 30 is triangular, the light guide member 30 only has a third light incident surface I3, the third light incident surface I3 and the side of the light guide member 30 have an inclination angle θ, and the other two sides of the light guide member 30 are respectively adjacent to the adhesive layer 80 and the diffusion plate 40.
Please refer to fig. 4, which is a configuration diagram of a fourth embodiment of the backlight module of the present invention, which is a cross-sectional view of a side of the backlight module of the present invention applied to a display. As shown in fig. 4, the backlight module of the present invention includes a frame 10, a light emitting unit 20, a light guide 30B and a diffusion plate 40, which are similar to those of the first embodiment, and the description thereof will not be repeated herein, but the fourth embodiment of the present invention is different from the first embodiment in that: the light guide member 30 has a trapezoid cross-section, the light guide member 30 has a fourth light incident surface I4 and a fifth light incident surface I5, the fourth light incident surface I4 and the fifth light incident surface I5 intersect each other, and the other two sides of the light guide member 30 are respectively adjacent to the adhesive layer 80 and the diffusion plate 40.
Referring to fig. 5 to 9, a configuration diagram of a first embodiment of the present invention applied to a display, a configuration diagram of a second embodiment of the present invention applied to a display, a configuration diagram of a third embodiment of the present invention applied to a display, a configuration diagram of a fourth embodiment of the present invention applied to a display, and a configuration diagram of a fifth embodiment of the present invention applied to a display are shown. The light guide members 30, 30C and 30D of the backlight module of the present invention can be applied to the display DS in a stripe shape as shown in fig. 5, 6 and 9, and the light guide member 30 of the backlight module of the present invention can be applied to the display DS in a plurality of light guide units 31 and 31A as shown in fig. 7 and 8. In addition, the display may include flexible display, organic light emitting diode display and light emitting diode display, which may also be other preferred types of display without limiting the scope of the invention.
As shown in fig. 5, the light guide 30 is located at one side of the display DS; as shown in fig. 6, two light guides 30C are respectively located at two sides of the display DS; as shown in fig. 7, the plurality of light guiding units 31 are distributed on two sides of the display DS; as shown in fig. 8, the plurality of light guiding units 31A are distributed on three sides of the display DS; as shown in fig. 9, the four light guides 30D are respectively located at four sides of the display DS. The light guides 30, 30C and 30D and the plurality of light guide units 31 and 31A shown in fig. 5 to 9 are only examples, which can be changed and exchanged as needed, and are not limited to the scope of the present invention.
In view of the above, the backlight module of the present invention, through the arrangement of the light guide member 30, meets the trend of light and thin, and meets the requirements of narrow-frame displays. In summary, the backlight module of the present invention has the advantages as described above, and successfully achieves the effect of a narrow bezel.
The foregoing is by way of example only and is not intended as limiting. Any equivalent modifications or alterations to the present invention without departing from the spirit and scope of the present invention are intended to be included in the claims.

Claims (9)

1. A backlight module, comprising:
a frame having a base and a side wall, the base and side wall being connected;
a light-emitting unit, which is arranged on the bottom plate and emits a light;
the light guide piece is arranged on the side wall and provided with at least one light incident surface, and is in a suspended state; and
the diffusion plate is arranged on the light guide piece and is close to the side wall, the diffusion plate, the bottom plate and the light guide piece jointly define a light mixing space, and the light is incident to the light incident surface and is guided to the light mixing space;
the light mixing space is arranged between the bottom plate and the diffusion plate, and the position of the light emitting unit corresponding to the diffusion plate is different from the position of the light guide piece corresponding to the diffusion plate.
2. The backlight module as claimed in claim 1, wherein the light incident surface and the side of the light guide member have an inclination angle.
3. The backlight module as claimed in claim 1, wherein the number of the light incident surfaces is plural, and the light incident surfaces intersect each other.
4. The backlight module as claimed in claim 3, wherein the light guide is disposed above the light emitting unit, the light emitting unit is spaced apart from the light guide, and the light is perpendicularly incident to one of the light incident surfaces.
5. The backlight module of claim 1, further comprising a reflective sheet disposed between the light emitting unit and the bottom plate, the reflective sheet extending to the sidewall, a portion of the reflective sheet being disposed between the light guide member and the sidewall.
6. The backlight module as claimed in claim 5, wherein a glue layer is disposed between the light guide member and the reflective sheet.
7. The backlight module of claim 1, wherein the light guide comprises a plurality of light guide units.
8. The backlight module as claimed in claim 7, wherein the backlight module is applied to a display, and the light guide member or the light guide units are disposed at a side of the display.
9. The backlight module of claim 8, wherein the light guide member or the light guide units are disposed on at least two sides of the display.
CN202011606988.8A 2020-08-13 2020-12-30 Backlight module Active CN112802393B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW109127616 2020-08-13
TW109127616A TWI766338B (en) 2020-08-13 2020-08-13 Backlight module

Publications (2)

Publication Number Publication Date
CN112802393A CN112802393A (en) 2021-05-14
CN112802393B true CN112802393B (en) 2023-04-28

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Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW200947055A (en) * 2008-05-02 2009-11-16 Ind Tech Res Inst A backlight module
TWM466278U (en) * 2013-07-30 2013-11-21 Unity Opto Technology Co Ltd Thinning LED direct-type backlight module
KR102529717B1 (en) * 2016-04-29 2023-05-04 엘지디스플레이 주식회사 display device
JP6857297B2 (en) * 2016-12-22 2021-04-14 日亜化学工業株式会社 Light guide plate, surface light source device, display device and electronic device
KR102421777B1 (en) * 2017-10-19 2022-07-18 삼성전자주식회사 Display apparatus
KR102046766B1 (en) * 2017-11-09 2019-11-20 엘지디스플레이 주식회사 Liquid crystal display device
CN108253346A (en) * 2018-01-18 2018-07-06 马飞 A kind of floated entirely lighting mark
CN109375415B (en) * 2018-10-23 2020-03-24 惠州市华星光电技术有限公司 Backlight module of narrow-frame display screen
TWI703386B (en) * 2019-07-31 2020-09-01 友達光電股份有限公司 Backlight module

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TW202206914A (en) 2022-02-16
CN112802393A (en) 2021-05-14
TWI766338B (en) 2022-06-01

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