CN111308606A - Light guide assembly and reflective display device - Google Patents
Light guide assembly and reflective display device Download PDFInfo
- Publication number
- CN111308606A CN111308606A CN201811517148.7A CN201811517148A CN111308606A CN 111308606 A CN111308606 A CN 111308606A CN 201811517148 A CN201811517148 A CN 201811517148A CN 111308606 A CN111308606 A CN 111308606A
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- China
- Prior art keywords
- light
- light guide
- guide plate
- halo
- side wall
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- Pending
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Classifications
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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
- G02B6/0033—Means for improving the coupling-out of light from the light guide
-
- 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
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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
-
- 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
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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)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention discloses a light guide assembly and a reflective display device. The light guide plate has a through hole, an inner sidewall surrounding the through hole, and an outer sidewall surrounding the inner sidewall. The inner side wall is provided with a halo eliminating structure. The halo-eliminating structure faces the perforation. The outer side wall is provided with a light incident surface. The light source faces the light incident surface of the outer side wall of the light guide plate. The reflected stray light generated at the light guide plate/air interface can be absorbed by the halo eliminating structure or scattered by the halo eliminating structure for uniformity. Therefore, the light guide assembly can be prevented from generating halation near the through hole of the light guide plate, and the display quality is further improved.
Description
Technical Field
The invention relates to a light guide assembly and a reflective display device with the same.
Background
In the market of various consumer electronic products nowadays, reflective display devices, such as electronic paper book display devices, have been widely applied as display screens of electronic products. Generally, an electric paper book display device has a Front Panel (FPL) and a thin film transistor array (TFT array) substrate.
The electric paper book display device can drive the white and black particles in the display medium layer by applying voltage to the display medium layer of the front panel, so that each pixel displays black, white or gray scale respectively. The electronic paper book display device achieves the purpose of displaying by irradiating the display medium layer by utilizing incident light, so that a backlight source is not needed, and the electric power can be saved.
In addition, in order to facilitate a user to use the electronic paper book display device in a dark environment, a front light module may be disposed above the front panel to irradiate the display medium layer. However, the light guide plate/air interface of the front light module generates stray light in the light guide plate, and if the light guide plate has a through hole, a halo is easily generated near the through hole, which affects the display quality.
Disclosure of Invention
One aspect of the present invention is a light guide assembly, which can prevent halo from being generated near a through hole of a light guide plate, thereby improving display quality. .
According to an embodiment of the present invention, a light guide assembly includes a light guide plate and a light source. The light guide plate has a through hole, an inner sidewall surrounding the through hole, and an outer sidewall surrounding the inner sidewall. The inner side wall is provided with a halo eliminating structure. The halo-eliminating structure faces the perforation. The outer side wall is provided with a light incident surface. The light source faces the light incident surface of the outer side wall of the light guide plate.
In an embodiment of the present invention, the halo removing structure is a light absorbing layer.
In an embodiment of the present invention, the light absorbing layer is a dark ink, a dark tape, or a dark kit.
In an embodiment of the present invention, the light absorbing layer contacts an inner sidewall of the light guide plate.
In an embodiment of the invention, the halo removing structure is a microstructure.
In an embodiment of the invention, the shape of the microstructure includes a saw-tooth shape, an arc shape or a combination thereof.
In an embodiment of the invention, the microstructure and the light guide plate are integrally formed.
Another aspect of the present invention is a reflective display device.
According to an embodiment of the present invention, a reflective display device includes a thin film transistor array substrate, a front panel and a light guide element. The front panel is positioned on the thin film transistor array substrate. The front panel has a light-transmitting film and a display medium layer. The display medium layer is positioned between the light-transmitting film and the thin film transistor array substrate. The light guide assembly is located on the front panel. The light guide assembly comprises a light guide plate and a light source. The light guide plate has a through hole, an inner sidewall surrounding the through hole, and an outer sidewall surrounding the inner sidewall. The inner side wall is provided with a halo eliminating structure. The halo-eliminating structure faces the perforation. The outer side wall is provided with a light incident surface. The light source faces the light incident surface of the outer side wall of the light guide plate.
In an embodiment of the present invention, the halo removing structure is a light absorbing layer.
In an embodiment of the present invention, the light absorbing layer is a dark ink, a dark tape, or a dark kit.
In an embodiment of the present invention, the light absorbing layer contacts an inner sidewall of the light guide plate.
In an embodiment of the invention, the halo removing structure is a microstructure.
In an embodiment of the invention, the shape of the microstructure includes a saw-tooth shape, an arc shape or a combination thereof.
In an embodiment of the invention, the microstructure and the light guide plate are integrally formed.
In the above embodiments of the present invention, since the inner sidewall of the light guide plate of the light guide assembly has the halo eliminating structure facing the through hole, when the light of the light source enters the light guide plate from the light incident surface of the outer sidewall of the light guide plate, the reflected stray light generated at the light guide plate/air interface can be absorbed by the halo eliminating structure or scattered by the halo eliminating structure for homogenization. Therefore, the light guide assembly can be prevented from generating halation near the through hole of the light guide plate, and the display quality is further improved.
Drawings
Fig. 1 is a top view of a light guide assembly according to an embodiment of the invention.
FIG. 2 is a cross-sectional view of the light guide plate of FIG. 1 along line 2-2.
Fig. 3 is a schematic diagram illustrating the light guide plate of fig. 2 after receiving light from the light source.
FIG. 4 is a perspective view of a reflective display device according to an embodiment of the invention.
Fig. 5 is a top view of a light guide assembly according to an embodiment of the invention.
FIG. 6 is a cross-sectional view of the light guide plate of FIG. 5 along line 6-6.
Fig. 7 is a schematic diagram illustrating the light guide plate of fig. 6 after receiving light from the light source.
FIG. 8 is a perspective view of a reflective display device according to an embodiment of the invention.
Detailed Description
In the following description, numerous implementation details are set forth in order to provide a thorough understanding of various embodiments of the invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, for the sake of simplicity, some conventional structures and elements are shown in the drawings in a simple schematic manner.
Fig. 1 is a top view of a light guide assembly 100 according to an embodiment of the invention. Fig. 2 is a cross-sectional view of the light guide plate 110 of fig. 1 along line 2-2. Referring to fig. 1 and 2, the light guide assembly 100 includes a light guide plate 110 and a light source 120. The light guide plate 110 has a through hole 112, an inner sidewall 114 surrounding the through hole 112, and an outer sidewall 116 surrounding the inner sidewall 114. The outer sidewall 116 of the light guide plate 110 has a light incident surface 117. In addition, the light guide plate 110 has two light emitting surfaces 111 and 113 opposite to each other. The upper and lower sides of the outer sidewall 116 are adjacent to the light-emitting surfaces 111, 113, respectively, and the upper and lower sides of the inner sidewall 114 are adjacent to the light-emitting surfaces 111, 113, respectively. That is, the inner sidewall 114 and the outer sidewall 116 are both located between the light emitting surface 111 and the light emitting surface 113. The light source 120 faces the light incident surface 117 of the outer sidewall 116 of the light guide plate 110. The light source 120 may be, for example, a light emitting diode, but is not limited to the invention.
When the light source 120 emits light, the light enters the light guide plate 110 through the light incident surface 117 and exits through the two light exiting surfaces 111 and 113. The light beam passing out from the light emitting surface 113 can be used as an incident light beam of a reflective display device (e.g., an electronic book). Therefore, the light guide assembly 100 can be used as a front light module of a reflective display device. In addition, the through hole 112 of the light guide plate 110 is provided for the rotation axis of the pointer, so that the light guide assembly 100 can be applied to products such as watches and clocks of reflective display devices, but the invention is not limited thereto.
The inner sidewall 114 of the light guide plate 110 has a halo removing structure 118. The halo-eliminating structure 118 faces the perforation 112. In this embodiment, the halo removing structure 118 is a light absorbing layer, and the light absorbing layer 118 has a function of absorbing light. In this embodiment, the light absorption layer 118 can be a dark ink, a dark tape, or a dark kit, such as a black ink, a black tape, or a black kit, but is not limited thereto. The light absorbing layer 118 may be attached to the inner sidewall 114 of the light guide plate 110. For example, the light absorbing layer 118 may directly contact the inner sidewall 114 of the light guide plate 110.
Fig. 3 is a schematic diagram illustrating the light guide plate 110 of fig. 2 after receiving light from the light source 120 (see fig. 1). Referring to fig. 1 and 3, when the light source 120 emits light, most of the light can be refracted and pass through the light emitting surfaces 111 and 113 of the light guide plate 110, and reflected stray light is generated at the light guide plate 110/air interface, and is transmitted in the light guide plate 110 as the light L in fig. 3.
Since the inner sidewall 114 of the light guide plate 110 of the light guide assembly 100 has the halo removing structure 118 facing the through hole 112, and the halo removing structure 118 is a light absorbing layer, when the light of the light source 120 enters the light guide plate 110 from the light incident surface 117 of the outer sidewall 116 of the light guide plate 110, the reflected stray light (e.g., the light L) generated at the light guide plate 110/air interface can be absorbed by the halo removing structure 118. Thus, the light guide assembly 100 can be prevented from generating halo near the through hole 112 of the light guide plate 110, thereby improving the display quality.
It should be understood that the connection and function of the elements described above will not be repeated, and will be described in detail. In the following description, a reflective display device having the light guide assembly 100 will be described.
FIG. 4 is a perspective view of a reflective display device 200 according to an embodiment of the invention. The reflective display device 200 includes a thin film transistor array (TFT array) substrate 132, a Front Panel (FPL) 133, and the light guide assembly 100 of fig. 1. The front panel 133 has a light transmissive film 134 and a display medium layer 136. The display medium layer 136 is located between the light-transmissive film 134 and the thin film transistor array substrate 132. The display medium layer 136 may include a plurality of microcapsules, and the microcapsules have a plurality of charged particles therein, such as black particles and white particles. The light guide assembly 100 is located on the front panel 133.
When the light source 120 emits light, the light enters the light guide plate 110 through the light incident surface 117 and exits through the two light exiting surfaces 111 and 113. The light beam exiting from the light exit surface 113 can be used as an incident light beam of the front panel 133. In the present embodiment, the light guide assembly 100 is a front light module of the reflective display device 200. In addition, the through hole 112 of the light guide plate 110 is provided for the rotation axis of the pointer, so that the reflective display device 200 can be applied to products such as watches and clocks.
In the following description, other types of light guide assemblies and reflective display devices will be described.
Fig. 5 is a top view of a light guide assembly 100a according to an embodiment of the invention. FIG. 6 is a cross-sectional view of the light guide plate 110a of FIG. 5 along line 6-6. Referring to fig. 5 and 6, the light guide assembly 100a includes a light guide plate 110a and a light source 120. The light guide plate 110a has a through hole 112, an inner sidewall 114 and an outer sidewall 116. The light source 120 faces the light incident surface 117 of the outer sidewall 116 of the light guide plate 110. The inner sidewall 114 of the light guide plate 110 has a halo removing structure 118 a. The halo-eliminating structure 118a faces the perforation 112. The difference from the embodiment of fig. 1 and 2 is that: the halo-eliminating structure 118a is a microstructure.
In the present embodiment, the shape of the microstructure 118a is an arc, but the invention is not limited thereto. The shape of microstructures 118a may comprise saw-tooth shapes, arcs, or combinations thereof. In addition, the microstructures 118a and the light guide plate 110a may be integrally formed, and the microstructures 118a may be manufactured together when the light guide plate 110a is manufactured, but the invention is not limited thereto.
When the light source 120 emits light, the light enters the light guide plate 110a from the light incident surface 117 and exits from the two light exiting surfaces 111 and 113. The light beam passing out from the light emitting surface 113 can be used as an incident light beam of a reflective display device (e.g., an electronic book). Therefore, the light guide assembly 100a can be used as a front light module of a reflective display device. In addition, the through hole 112 of the light guide plate 110a can be used for the rotation axis of the pointer, so that the light guide assembly 100a can be applied to products such as watches and clocks of reflective display devices, but not limited thereto.
Fig. 7 is a schematic diagram illustrating the light guide plate 110a of fig. 6 after receiving light from the light source 120 (see fig. 5). Referring to fig. 5 and 7, when the light source 120 emits light, most of the light can be refracted and pass through the light emitting surfaces 111 and 113 of the light guide plate 110a, and reflected stray light is generated at the light guide plate 110 a/air interface, and is transmitted in the light guide plate 110a as the light L in fig. 7.
Since the inner sidewall 114 of the light guide plate 110a of the light guide assembly 100a has the halo removing structure 118a facing the through hole 112, and the halo removing structure 118a is a microstructure, when the light of the light source 120 enters the light guide plate 110a from the light incident surface 117 of the outer sidewall 116 of the light guide plate 110a, the reflected stray light (e.g., the light L) generated at the light guide plate 110 a/air interface can be scattered and homogenized by the halo removing structure 118a to form the light Lc. Thus, the light guide assembly 100a can be prevented from generating halo near the through hole 112 of the light guide plate 110a, thereby improving the display quality.
It should be understood that the connection and function of the elements described above will not be repeated, and will be described in detail. In the following description, a reflective display device having the light guide assembly 100a will be described.
FIG. 8 is a perspective view of a reflective display device 200a according to an embodiment of the invention. The reflective display device 200a includes a thin film transistor array (TFT array) substrate 132, a Front Panel (FPL) 133, and the light guide assembly 100a of fig. 5. The front panel 133 has a light transmissive film 134 and a display medium layer 136. The display medium layer 136 is located between the light-transmissive film 134 and the thin film transistor array substrate 132. The display medium layer 136 may include a plurality of microcapsules, and the microcapsules have a plurality of charged particles therein, such as black particles and white particles. The light guide assembly 100a is positioned on the front panel 133.
When the light source 120 emits light, the light enters the light guide plate 110a from the light incident surface 117 and exits from the two light exiting surfaces 111 and 113. The light beam exiting from the light exit surface 113 can be used as an incident light beam of the front panel 133. In the present embodiment, the light guide assembly 100a is a front light module of the reflective display device 200 a. In addition, the through hole 112 of the light guide plate 110a can be used for the rotation axis of the pointer, so that the reflective display device 200a can be applied to products such as watches and clocks.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Claims (14)
1. A light guide assembly, comprising:
the light guide plate is provided with a through hole, an inner side wall surrounding the through hole and an outer side wall surrounding the inner side wall, wherein the inner side wall is provided with a halo eliminating structure, the halo eliminating structure faces the through hole, and the outer side wall is provided with a light incident surface; and
and the light source faces the light incident surface of the outer side wall of the light guide plate.
2. The light guide assembly of claim 1, wherein the halo-abating structure is a light absorbing layer.
3. The light guide assembly of claim 2, wherein the light absorbing layer is a dark ink, a dark tape, or a dark sleeve.
4. The light guide assembly of claim 2, wherein the light absorbing layer contacts the inner sidewall of the light guide plate.
5. A light guide assembly according to claim 1 wherein the halo-abating structure is a microstructure.
6. The light guide assembly of claim 5, wherein the microstructures have a shape comprising a saw-tooth shape, an arc shape, or a combination thereof.
7. The light guide assembly of claim 5, wherein the microstructures are integrally formed with the light guide plate.
8. A reflective display device, comprising:
a thin film transistor array substrate;
the front panel is positioned on the thin film transistor array substrate and provided with a light-transmitting film and a display medium layer, and the display medium layer is positioned between the light-transmitting film and the thin film transistor array substrate; and
a light guide assembly located on the front panel, comprising:
the light guide plate is provided with a through hole, an inner side wall surrounding the through hole and an outer side wall surrounding the inner side wall, wherein the inner side wall is provided with a halo eliminating structure, the halo eliminating structure faces the through hole, and the outer side wall is provided with a light incident surface; and
and the light source faces the light incident surface of the outer side wall of the light guide plate.
9. The reflective display device of claim 8, wherein the halo-eliminating structure is a light-absorbing layer.
10. The reflective display device of claim 9, wherein the light absorbing layer is a dark ink, a dark tape, or a dark sleeve.
11. The reflective display device according to claim 9, wherein the light absorbing layer contacts the inner sidewall of the light guide plate.
12. The reflective display device of claim 8, wherein the halo-canceling structure is a microstructure.
13. The reflective display device of claim 12, wherein the microstructures have a shape comprising saw-tooth shapes, curved shapes, or a combination thereof.
14. The reflective display device of claim 12, wherein the microstructures are integrally formed with the light guide plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811517148.7A CN111308606A (en) | 2018-12-12 | 2018-12-12 | Light guide assembly and reflective display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811517148.7A CN111308606A (en) | 2018-12-12 | 2018-12-12 | Light guide assembly and reflective display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111308606A true CN111308606A (en) | 2020-06-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811517148.7A Pending CN111308606A (en) | 2018-12-12 | 2018-12-12 | Light guide assembly and reflective display device |
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| CN (1) | CN111308606A (en) |
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| TWI631396B (en) * | 2017-07-14 | 2018-08-01 | 元太科技工業股份有限公司 | Light guide assembly and display device |
| TWM565315U (en) * | 2018-03-09 | 2018-08-11 | 大陸商瑞儀光電（蘇州）有限公司 | Planar light emitting device |
| CN108826103A (en) * | 2018-06-29 | 2018-11-16 | 厦门天马微电子有限公司 | A kind of display device |
| CN108957621A (en) * | 2018-09-12 | 2018-12-07 | 东莞通华液晶有限公司 | A kind of annular light guide plate and automobile instrument mould group |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1692292A (en) * | 2002-12-16 | 2005-11-02 | 卡西欧计算机株式会社 | Lighting and electronic apparatus |
| TW200632603A (en) * | 2004-12-02 | 2006-09-16 | Asulab Sa | Timepiece including optical guide which performs the function of a crystal |
| US20110157517A1 (en) * | 2008-09-30 | 2011-06-30 | Sharp Kabushiki Kaisha | Illumination device and liquid crystal display device |
| CN102252234A (en) * | 2011-07-06 | 2011-11-23 | 苏州茂立光电科技有限公司 | Light emitting module and light guide plate |
| TW201326685A (en) * | 2011-12-30 | 2013-07-01 | Global Lighting Technology Inc | Illumination module and its light guide plate |
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| TWM482759U (en) * | 2014-03-20 | 2014-07-21 | Chicony Power Tech Co Ltd | Light leakage proof microstructure for through hole of backlight module of keyboard |
| CN108027116A (en) * | 2015-09-15 | 2018-05-11 | 夏普株式会社 | Lighting device and display device |
| TWI631396B (en) * | 2017-07-14 | 2018-08-01 | 元太科技工業股份有限公司 | Light guide assembly and display device |
| TWM565315U (en) * | 2018-03-09 | 2018-08-11 | 大陸商瑞儀光電（蘇州）有限公司 | Planar light emitting device |
| CN108826103A (en) * | 2018-06-29 | 2018-11-16 | 厦门天马微电子有限公司 | A kind of display device |
| CN108957621A (en) * | 2018-09-12 | 2018-12-07 | 东莞通华液晶有限公司 | A kind of annular light guide plate and automobile instrument mould group |
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Application publication date: 20200619 |
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