CN106200113B - Backlight module - Google Patents

Backlight module Download PDF

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Publication number
CN106200113B
CN106200113B CN201610007702.1A CN201610007702A CN106200113B CN 106200113 B CN106200113 B CN 106200113B CN 201610007702 A CN201610007702 A CN 201610007702A CN 106200113 B CN106200113 B CN 106200113B
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CN
China
Prior art keywords
light
conductive layer
patterned conductive
backlight module
guide plate
Prior art date
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Expired - Fee Related
Application number
CN201610007702.1A
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Chinese (zh)
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CN106200113A (en
Inventor
刘瀚元
李俊苇
周暄
陈靖玮
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Coretronic Corp
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Coretronic Corp
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Publication date
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Publication of CN106200113A publication Critical patent/CN106200113A/en
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Expired - Fee Related legal-status Critical Current
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    • 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
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/009—Positioning aspects of the light source in the package
    • 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
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • 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
    • G02F1/133612—Electrical details

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The invention discloses a backlight module which comprises a light guide plate, a first reflector plate and a light source. The light guide plate is provided with a light incident surface, a bottom surface and a light emergent surface, wherein the bottom surface is connected with the light incident surface, and the light emergent surface is opposite to the bottom surface and is connected with the light incident surface. The first reflector plate is provided with a first surface, a second surface and at least one through hole. The second surface is opposite to the first surface, a part of the first surface is arranged on the bottom surface, and the first surface and the second surface are connected through the through hole. The light source includes a circuit substrate and at least one light emitting element. The circuit substrate is provided with a first patterned conductive layer. The light emitting element is arranged on the first patterned conductive layer and is suitable for providing light rays entering the light guide plate from the light incident surface, wherein the light emitting element penetrates through the through hole of the first reflector plate.

Description

Backlight module
Technical Field
The present invention relates to a backlight module, and more particularly, to a backlight module for a liquid crystal display.
Background
The current electronic devices are developed in a direction of multifunction, beauty and lightness. Since lcd has the advantages of being light and thin, lcd is widely used in various mobile electronic devices (e.g. smart phones and tablet computers). Since a Liquid crystal display panel (Liquid crystal display panel) does not have an active light emitting function, a backlight module must be disposed below the Liquid crystal display panel to serve as a surface light source, so that the Liquid crystal display panel can achieve the purpose of displaying.
Fig. 1 is a schematic cross-sectional view of a conventional backlight module. Referring to fig. 1, a conventional backlight module 20 includes a light guide plate 21, a reflective sheet 22, a light source 23, a back cover 25 and a frame 26. The light guide plate 21, the reflective sheet 22 and the light source 23 are disposed in the accommodating space formed by the back cover 25 and the rubber frame 26. The light guide plate 21 has a light incident surface 213, a bottom surface 212 and a light emitting surface 211, wherein the bottom surface 212 is connected to the light incident surface 213, and the light emitting surface 211 is opposite to the bottom surface 212 and connected to the light incident surface 213. The light source 23 includes a circuit substrate 235 and a light emitting device 232, wherein the light emitting device 232 is disposed on the circuit substrate 235 and adjacent to the light incident surface 213 to provide a light L1 entering the light guide plate 21. The reflective sheet 22 is disposed on the bottom surface 212, and the reflective sheet 22 is adhered to the light guide plate 21 and the circuit substrate 235 through the fixing tape 27.
However, in the conventional backlight module 20, the fixing tape 27 usually uses an opaque double-sided tape to prevent light leakage, but such a design would reduce the utilization rate of the light L1 emitted from the light source 23. In addition, with the trend of light and thin mobile electronic devices, it is an important issue to make various components (such as a backlight module of a liquid crystal display) in the mobile electronic devices more light and thin. In the conventional backlight module 20, the circuit substrate 235 and the fixing tape 27 have a certain thickness, so that the conventional backlight module 20 is difficult to achieve the purpose of light weight and thinness.
The background section is provided to facilitate an understanding of the present disclosure, and thus, the disclosure in the background section may include certain well-known techniques that do not constitute a part of the common general knowledge of a person of ordinary skill in the art. The statements in the "background" section do not represent that matter or the problems which may be solved by one or more embodiments of the present invention, but are known or appreciated by those skilled in the art before filing the present application.
Disclosure of Invention
The invention provides a backlight module which has a thinner thickness.
Other objects and advantages of the present invention will be further understood from the technical features disclosed in the present invention.
In order to achieve one or a part of or all of the above or other objects, an embodiment of the invention provides a backlight module including a light guide plate, a first reflective sheet and a light source. The light guide plate is provided with a light incident surface, a bottom surface and a light emergent surface. The bottom surface is connected with the light incident surface, and the light emergent surface is opposite to the bottom surface and is connected with the light incident surface. The first reflector plate is provided with a first surface, a second surface and at least one through hole. The second surface is opposite to the first surface, a part of the first surface is arranged on the bottom surface, and the first surface and the second surface are connected through the through hole. The light source includes a circuit substrate and at least one light emitting element. The circuit substrate is provided with a first patterned conductive layer. A portion of the second side of the first reflector sheet is disposed on the first patterned conductive layer. The light emitting element is suitable for providing light rays to enter the light guide plate from the light incident surface. Each light-emitting element penetrates through at least one through hole of the first reflector plate and is configured on the patterned conductive layer of the circuit substrate.
In an embodiment of the invention, the circuit substrate has an insulating layer, a second patterned conductive layer and a protective layer. The insulating layer, the second patterned conductive layer and the protective layer are sequentially stacked on the first patterned conductive layer. The insulating layer is located between the first patterned conductive layer and the second patterned conductive layer.
In an embodiment of the invention, the first reflective sheet and the insulating layer are respectively disposed on two opposite surfaces of the first patterned conductive layer.
In an embodiment of the invention, the circuit substrate has flexibility.
In an embodiment of the invention, the backlight module further includes a rubber frame and a back cover. The back cover and the rubber frame form an accommodating space for accommodating the light guide plate, the first reflector plate and the light source.
In an embodiment of the invention, the backlight module further includes a second reflective sheet. The second reflector plate is arranged between the edge of the light-emitting surface of the light guide plate and the back cover.
In an embodiment of the invention, the first patterned conductive layer is not in direct contact with the adhesive frame and the back cover.
In an embodiment of the invention, the first reflective sheet and the circuit substrate are parallel to each other.
In an embodiment of the invention, the light guide plate has a plurality of optical microstructures, and the optical microstructures are disposed on the bottom surface.
In view of the above, the embodiments of the present invention have at least one of the following advantages, and in the embodiments of the present invention, the first reflective sheet may be directly disposed on the first patterned conductive layer, and the first reflective sheet has a plurality of through holes. In addition, the light emitting element can directly penetrate through the first patterned circuit layer through the through hole of the first reflector plate. Therefore, the backlight module of the invention can directly replace the protective layer with the first reflector sheet configured on the first patterned circuit layer to reduce the thickness of the circuit substrate, so that the mobile electronic device conforms to the development trend of thinning at present.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic cross-sectional view of a conventional backlight module.
Fig. 2 is a schematic diagram of a backlight module according to an embodiment of the invention.
Fig. 3 is an enlarged cross-sectional view of the backlight module of fig. 1 along line a-a'.
Detailed Description
The foregoing and other technical and scientific aspects, features and utilities of the present invention will be apparent from the following detailed description of various embodiments, which is to be read in connection with the accompanying drawings. Directional phrases used in the following embodiments, such as, for example, upper, lower, front, rear, left, right, etc., refer only to the orientation of the drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.
Fig. 2 is a schematic diagram of a backlight module according to an embodiment of the invention. Fig. 3 is an enlarged cross-sectional view of the backlight module of fig. 2 along line a-a'. Referring to fig. 2 and 3, in the present embodiment, the backlight module 100 includes a light guide plate 110, a first reflective sheet 120 and a light source 130. The light guide plate 110 has a light incident surface 113, a bottom surface 112, and a light emitting surface 111. The bottom surface 112 is connected to the light incident surface 113, and the light emitting surface 111 is opposite to the bottom surface 112 and connected to the light incident surface 113, wherein the light guide plate 110 is made of glass, PMMA (polymethyl methacrylate), PC (Polycarbonate), or other suitable transparent materials, for example. The first reflective sheet 120 is, for example, a white reflective sheet, a silver reflective sheet or other suitable reflective material, and the first reflective sheet 120 has a first surface 121, a second surface 122 and at least one through hole 123. In the present embodiment, the second surface 122 of the first reflective sheet 120 is opposite to the first surface 121, and a part of the first surface 121 is disposed on the bottom surface 112 of the light guide plate 110. Furthermore, the through hole 123 of the first reflective sheet 120 connects the first surface 121 and the second surface 122. In the present embodiment, the Light source 130 includes a circuit substrate 135 and a Light emitting element 132, wherein the Light emitting element 132 is, for example, a Light Emitting Diode (LED) or other suitable Light sources. As shown in fig. 3, the light emitting element 132 is adjacent to the light incident surface 113 and can provide light L entering the light guide plate 110 from the light incident surface 113.
In addition, the light emitting element 132 of the light source 130 is disposed on the first patterned conductive layer 135a of the circuit substrate 135. The light emitting element 132 may be disposed in the through hole 123 of the first reflective sheet 120, and the light emitting element 132 may be directly connected to the first patterned conductive layer 135 a. In this embodiment, since a portion of the first reflective sheet 120 is disposed on the first patterned conductive layer 135a, compared to the conventional backlight module 20 of fig. 1, a protection layer (not shown) on the conventional circuit substrate 235 can be omitted, and the first reflective sheet 120 can achieve the protection effect of preventing the first patterned conductive layer 135a from being degraded and insulating. Therefore, the thickness of the backlight module 100 of the present embodiment can be further reduced compared to the thickness of the conventional backlight module 20, so as to meet the trend of thinning the display device.
The light source 130 is, for example, a light emitting diode light bar, and the light emitting elements 132 of the light source 130 are a plurality of light emitting diodes sequentially arranged on the circuit substrate 135. In addition, referring to fig. 3, the circuit substrate 135 of the present embodiment further includes an insulating layer 135d, a second patterned conductive layer 135b and a protective layer 135c in addition to the first patterned conductive layer 135 a. In the present embodiment, the insulating layer 135d, the second patterned conductive layer 135b and the passivation layer 135c are sequentially stacked on the first patterned conductive layer 135a, and the insulating layer 135d is located between the first patterned conductive layer 135a and the second patterned conductive layer 135 b. In other words, in the stacked structure of the circuit substrate 135, the first patterned conductive layer 135a, the insulating layer 135d, the second patterned conductive layer 135b, and the passivation layer 135c are sequentially arranged from top to bottom in the thickness direction of the circuit substrate 135. In addition, in the embodiment, the insulating layer 135d is configured to insulate the conductive paths of the first patterned conductive layer 135a and the second patterned conductive layer 135b from each other, so as to prevent the circuit substrate 135 from short-circuiting. The first patterned conductive layer 135a and the second patterned conductive layer 135b are made of a metal material, such as a copper foil conductive layer.
Referring to fig. 3 again, a portion of the first reflective sheet 120 of the present embodiment is disposed on the first patterned conductive layer 135 a. Therefore, a portion of the first reflective sheet 120 and the insulating layer 135d are disposed on the two opposite surfaces 135a1 and 135a2 of the first patterned conductive layer 135a, respectively. In addition, the Circuit substrate 135 and the first reflection sheet 120 of the present embodiment are disposed in parallel, wherein the Circuit substrate 135 is formed by, for example, removing a protection layer of a Printed Circuit Board (pcb) or a Flexible Printed Circuit Board (FPCB), which is not limited in the present invention.
As shown in fig. 3, the backlight module 100 may include a plastic frame 160 and a back cover 150, wherein the back cover 150 is made of metal, and the plastic frame 160 is made of plastic, for example, but the invention is not limited thereto. The back cover 150 and the rubber frame 160 together form an accommodating space for accommodating the light guide plate 110, the first reflective sheet 120 and the light source 130. The back cover 150 and the rubber frame 160 can accommodate and protect the above components, and can also shield and absorb part of the light L emitted from the light source 130, so as to reduce the light leakage of the backlight module 100.
In addition, the backlight module 100 may include a second reflective sheet 140. As shown in fig. 3, the cross-sectional shape of the back cover 150 of the present embodiment is, for example, a U-shape, and the notch faces the light guide plate 110. Therefore, the second reflective sheet 140 can be selectively disposed between the edge of the light-emitting surface 111 of the light guide plate 110 and the upper plate of the back cover 150 in this embodiment. The second reflective sheet 140 is used for reflecting the light L from the light emitting element 132 and making the light L enter the light guide plate 110 again, so as to further improve the light utilization efficiency of the light source 130 and prevent the light L from exiting from between the edge of the light exiting surface 111 and the back cover 150. In addition, the light guide plate 110 of the embodiment further has a plurality of optical microstructures 170, and the optical microstructures 170 are arranged on the bottom surface 112 of the light guide plate 110 to increase the light emitting efficiency of the light source 130 and the controllability of the light emitting path of the backlight module 100. The optical microstructures 170 are uniformly distributed on the bottom surface 112 of the light guide plate 110, but the invention is not limited thereto, and the arrangement density of the optical microstructures 170 may also gradually increase with the distance from the light source 130 to improve the light-emitting uniformity of the light guide plate 110.
The invention is not limited to the bonding method between the first reflective sheet 120 and the first patterned conductive layer 135 a. The first reflective sheet 120 may be directly disposed on the first patterned conductive layer 135 a. Alternatively, as shown in fig. 3, the first reflective sheet 120 may also be adhered to the first patterned conductive layer 135a through the first adhesive layer 125, so as to increase the positioning effect between the first reflective sheet 120 and the circuit substrate 135, and prevent damage caused by friction between these components. In addition, the first adhesive layer 125 can also be disposed to prevent the first patterned conductive layer 135a from being in direct contact with the back cover 150 and the frame 160 to cause short circuit. The first adhesive layer 125 is, for example, a non-conductive double-sided adhesive or other suitable adhesive, but the invention is not limited thereto.
In order to make the plastic frame 160 and the back cover 150 of the present embodiment more firmly joined, the plastic frame 160 of the present embodiment further has a hook 162, and the back cover 150 is further provided with a slot 152 capable of being mutually engaged with the hook 162, so that the plastic frame 160 is fixed on the back cover 150 in an engaging manner, which can reduce the use of screws and other fasteners and reduce the weight of the backlight module 100. Furthermore, the first reflective sheet 120 of the present embodiment may be directly disposed on the plastic frame 160, or as shown in fig. 3, the second adhesive layer 165 may be selectively disposed between the first reflective sheet 120 and the plastic frame 160 to adhere the first reflective sheet 120 to the plastic frame 160, so as to prevent the first reflective sheet 120 and the plastic frame 160 from being damaged due to mutual friction. The second adhesive layer 165 is, for example, a double-sided adhesive or other suitable adhesive, but the invention is not limited thereto.
In summary, the embodiments of the present invention have at least one of the following advantages, in the embodiments of the present invention, the first reflective sheet can be directly disposed on the first patterned conductive layer, and the first reflective sheet has a plurality of through holes. The plurality of light emitting elements can respectively and directly penetrate through the first patterned circuit layer through the through holes of the first reflector plate. Therefore, the backlight module of the invention does not need to arrange a protective layer between the first patterned circuit layer and the light-emitting element additionally, so as to reduce the thickness of the circuit substrate of the whole backlight module and be beneficial to the mobile electronic device to meet the development trend of thinning. In addition, the first reflection sheet can be adhered to the first patterned conductive layer through the first adhesive layer to prevent damage caused by friction among the members, and short circuit caused by direct contact among the first patterned conductive layer, the back cover and the adhesive frame can be avoided through the arrangement of the first adhesive layer.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents. Moreover, it is not necessary for any embodiment or claim of the invention to address all of the objects, advantages, or features disclosed herein. In addition, the abstract section and the title are provided for assisting the patent document retrieval and are not intended to limit the scope of the present invention. In addition, the terms "first", "second", and the like in the description or the claims are only used for naming elements (elements) or distinguishing different embodiments or ranges, and are not used for limiting the upper limit or the lower limit on the number of elements.
[ notation ] to show
100: backlight module
110. 21: light guide plate
111. 211: light emitting surface
112. 212, and (3): bottom surface
113. 213: light incident surface
120: first reflector plate
121: first side
122: second surface
123: perforation
125: first adhesive layer
130. 23: light source
132. 232: light emitting element
135. 235: circuit board
135 a: first patterned conductive layer
135a 1: surface of
135a 2: surface of
135 b: second patterned conductive layer
135 c: protective layer
135 d: insulating layer
140: second reflecting sheet
150. 25: back cover
152: clamping groove
160. 26: rubber frame
162: clamping hook
165: second adhesive layer
170: optical microstructure
20: known backlight module
22: reflector plate
27: fixing adhesive tape
L, L1: light ray

Claims (6)

1. A backlight module comprises a light guide plate, a first reflector, a light source, a plastic frame and a back cover,
the light guide plate is provided with a light incident surface, a bottom surface and a light emergent surface, wherein the bottom surface is connected with the light incident surface, the light emergent surface is opposite to the bottom surface and is connected with the light incident surface,
the first reflector plate is provided with a first surface, a second surface and at least one through hole, wherein the second surface is opposite to the first surface, a part of the first surface is arranged on the bottom surface, and the at least one through hole is connected with the first surface and the second surface,
the light source comprises a circuit substrate and at least one light-emitting element,
the circuit substrate is provided with a first patterned conductive layer, an insulating layer, a second patterned conductive layer and a protective layer, wherein a part of the second surface of the first reflector plate is arranged on the first patterned conductive layer, the insulating layer, the second patterned conductive layer and the protective layer are sequentially stacked on the first patterned conductive layer, and the insulating layer is positioned between the first patterned conductive layer and the second patterned conductive layer so as to insulate the conductive paths of the first patterned conductive layer and the second patterned conductive layer from each other and avoid the short circuit of the circuit substrate,
the at least one light emitting element is suitable for providing a light ray entering the light guide plate from the light incident surface, wherein each light emitting element is arranged on the first patterned conductive layer of the circuit substrate in a penetrating way through the at least one through hole of the first reflector plate,
the back cover and the rubber frame form an accommodating space for accommodating the light guide plate, the first reflector plate and the light source, the first patterned conductive layer is not in direct contact with the rubber frame and the back cover, and the first reflector plate is arranged on the rubber frame.
2. The backlight module of claim 1, wherein the first reflective sheet and the insulating layer are respectively disposed on two opposite surfaces of the first patterned conductive layer.
3. The backlight module of claim 1, wherein the circuit substrate is flexible.
4. The backlight module of claim 1, further comprising:
the second reflector plate is arranged between the edge of the light emergent surface of the light guide plate and the back cover.
5. The backlight module of claim 1, wherein the first reflective sheet and the circuit substrate are parallel to each other.
6. The backlight module of claim 1, wherein the light guide plate has a plurality of optical microstructures, and the optical microstructures are disposed on the bottom surface.
CN201610007702.1A 2015-06-01 2016-01-06 Backlight module Expired - Fee Related CN106200113B (en)

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TW104117654A TWI547742B (en) 2015-06-01 2015-06-01 Backlight module
TW104117654 2015-06-01

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CN106200113B true CN106200113B (en) 2020-03-24

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CN110249258A (en) 2017-11-15 2019-09-17 瑞仪光电(苏州)有限公司 Backlight module and display equipment
JP7317800B2 (en) * 2018-03-22 2023-07-31 日東電工株式会社 optical device
US11488793B2 (en) 2019-06-18 2022-11-01 Lite-On Electronics (Guangzhou) Limited Circuit structure, backlight module and light-emitting key device using the same

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CN106200113A (en) 2016-12-07
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