CN110737130B - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
- Publication number
- CN110737130B CN110737130B CN201810798757.8A CN201810798757A CN110737130B CN 110737130 B CN110737130 B CN 110737130B CN 201810798757 A CN201810798757 A CN 201810798757A CN 110737130 B CN110737130 B CN 110737130B
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- Prior art keywords
- emitting diodes
- arc
- light
- row
- backlight module
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- 230000003287 optical effect Effects 0.000 claims abstract description 38
- 238000010586 diagram Methods 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
Classifications
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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
- G02F1/133603—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
- G02F1/133613—Direct backlight characterized by the sequence of light sources
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
本发明提供一种背光模组，包含具有至少一个弧形边缘的光学板，及多个发光二极管。多个发光二极管呈多行排列于该光学板下方，并且最靠近该弧形边缘的发光二极管沿着该弧形边缘以弧线方式排列，其中，每一行发光二极管沿着轴向排列，相邻的另一行发光二极管则平行于该轴向间隔排列，且至少一行发光二极管与相邻的另一行发光二极管以该轴向为基准方向呈错位排列。藉此，可以减少不规则形状的光学板的边缘产生暗影的机会。本发明还提供一种包含上述背光模组的显示装置。
The present invention provides a backlight module, comprising an optical plate having at least one arc-shaped edge, and a plurality of light-emitting diodes. The plurality of light-emitting diodes are arranged in multiple rows below the optical plate, and the light-emitting diodes closest to the arc-shaped edge are arranged in an arc along the arc-shaped edge, wherein each row of light-emitting diodes is arranged along an axial direction, and another adjacent row of light-emitting diodes is arranged parallel to the axial direction and spaced apart, and at least one row of light-emitting diodes and another adjacent row of light-emitting diodes are arranged in a staggered manner with the axial direction as a reference direction. In this way, the chance of dark shadows being generated at the edge of an irregularly shaped optical plate can be reduced. The present invention also provides a display device comprising the above-mentioned backlight module.
Description
Technical Field
The present invention relates to a light source module, and more particularly to a backlight module and an application thereof in a display device.
Background
The backlight module can be divided into two types of side light type light incidence (EDGE LIGHTING) and direct type light incidence (bottom lighting) according to the different incidence positions of the light sources. Backlight modules are commonly used in various information, communication and consumer products to provide a surface light source for a Liquid crystal display (Liquid CRYSTAL DISPLAY, LCD) of the products.
The conventional optical plate is generally rectangular, and the light source for direct light incidence is a plurality of light emitting elements arranged under the optical plate in a matrix manner, so that the brightness of the optical plate at each position of the light incidence surface is uniform.
However, when the optical plate is of an irregular structure, if the light emitting members are still arranged in a matrix manner, this may cause irregular shadows at the edges of the optical plate, thereby causing uneven overall brightness.
Disclosure of Invention
Therefore, an objective of the present invention is to provide a backlight module that improves brightness uniformity of a non-rectangular optical plate.
The backlight module comprises an optical plate with at least one arc edge and a plurality of light emitting diodes. The light emitting diodes are arranged below the optical plate in a plurality of rows, the light emitting diode closest to the arc-shaped edge is arranged in an arc manner along the arc-shaped edge, wherein each row of light emitting diodes is arranged along the axial direction, the adjacent other row of light emitting diodes is arranged at intervals in parallel with the axial direction, and at least one row of light emitting diodes and the adjacent other row of light emitting diodes are arranged in a staggered manner by taking the axial direction as a reference direction.
Another technical means of the present invention is that the optical plate has an upper side and a lower side spaced apart from the upper side, and at least one arc-shaped edge of the optical plate is located on at least one of the upper side and the lower side.
The optical plate comprises an upper side and a lower side, wherein the upper side is provided with a left horizontal section, a right horizontal section and an upward bent arc section connected between the left horizontal section and the right horizontal section.
In another technical means of the present invention, the arrangement pitch of any two adjacent leds in the same row of leds is the same.
Another technical means of the present invention is that the arrangement pitch of each row of light emitting diodes is different from the arrangement pitch of the adjacent rows of light emitting diodes.
In another technical means of the present invention, a space is formed between the projection of each row of light emitting diodes on the optical plate and the upper side and the lower side respectively.
Another objective of the present invention is to provide a display device including the above-mentioned backlight module.
The display device comprises the backlight module and a display panel arranged on the backlight module.
The invention has the beneficial effects that the LEDs near the edge can be arranged along the edge of the optical plate by the arrangement mode of the LEDs, so that the chance of generating dark shadows on the edge of the optical plate with irregular shape is reduced.
Drawings
FIG. 1 is a schematic top view illustrating a backlight module according to a preferred embodiment of the invention;
FIG. 2 is a side view schematic diagram of the auxiliary illustration of FIG. 1, and
Fig. 3 is an enlarged schematic diagram illustrating an enlarged situation of the block diagram portion of fig. 1.
Detailed Description
The relevant scope and technical content of the present invention will be apparent from the following detailed description of the preferred embodiments with reference to the accompanying drawings. Before proceeding to the detailed description, it should be noted that similar components are denoted by the same reference numerals.
Fig. 1 and 2 show a preferred embodiment of the backlight module of the present invention. As shown in fig. 1 and 2, the backlight module includes an optical plate 2 and a plurality of light emitting diodes 3. The light emitting diode 3 is disposed below the optical plate 2. The backlight module is provided with a panel at the light-emitting position thereof, thereby forming a display device.
Referring to fig. 1, the optical plate 2 has an upper side 21 and a lower side 22 spaced from the upper side 21, wherein the upper side 21 is curved upward, and the lower side 22 has a left horizontal section 221, a right horizontal section 222, and a curved section 223 connected between the left horizontal section 221 and the right horizontal section 222 and curved upward. Thus, the optical plate 2 is formed with two curved edges, one of which is the upper side 21 and the other of which is the lower side 22, namely the curved segment 223. As can be seen from the shape of the optical plate 2, the present preferred embodiment is applied to a non-rectangular optical plate 2 (e.g., an instrument panel for a vehicle, etc.).
The light emitting diodes 3 are arranged in a plurality of rows below the optical plate 2, and the light emitting diodes 3 closest to the arc-shaped edge are arranged in an arc manner along the arc-shaped edge. As is clear from the top view shown in fig. 1, the light emitting diodes 3 near the upper edge of the optical plate 2 are arranged in an arc along the upper side 21, and the light emitting diodes 3 near the lower edge of the optical plate 2 are arranged in an arc along the curved section 223 of the lower side 22.
Specifically, the projection of each row of light emitting diodes 3 on the optical plate 2 forms a distance with the upper side 21 and the lower side 22, each row of light emitting diodes 3 is arranged along the axial direction, the adjacent other row of light emitting diodes 3 is arranged at intervals parallel to the axial direction, and at least one row of light emitting diodes 3 and the adjacent other row of light emitting diodes 3 are arranged in a staggered manner with respect to the axial direction.
Referring to fig. 3, since the optical plate 2 is irregularly shaped, the total distance (L) of the optical plate 2 from each row of leds 3 to be arranged, that is, the vertical distance between the upper side 21 and the lower side 22, should be first found when the leds 3 are arranged. According to the shape of the optical plate 2 in the present embodiment, the total distance (L) for arranging the light emitting diodes 3 of each row is not the same. Next, the pitch (p) of two adjacent leds 3 in the same row of leds 3, and the distance (D1, D2) reserved up and down for each row of leds 3 are determined. Then, (L-D 1-D2)/p=y is calculated, which is then made N after unconditional carry rounding since Y may not be an integer. Next, L/n=p is calculated. Wherein P is the vertical spacing between two adjacent leds 3 in the same row of leds 3, and the number of leds 3 in the row is (n+1).
As can be seen from the above calculation, the arrangement pitch of any two adjacent leds 3 is the same in the same row of leds 3. Since the upper side 21 is of a completely arc-shaped design, the arrangement pitch of the light emitting diodes 3 of each row is different from the arrangement pitch of the light emitting diodes 3 of the adjacent row.
As can be seen from the above preferred embodiments, the backlight module of the present invention can change the arrangement number of the leds 3 of each row according to the total distance, and can arrange the leds 3 of two rows of leds 3 at the end along the upper side 21 and the lower side 22, and can make at least one row of leds 3 and another adjacent row of leds 3 in a staggered arrangement, thereby effectively reducing the chance of generating shadows at the edge of the irregularly shaped optical plate 2, and thus the present invention can achieve the purpose.
The foregoing description of the preferred embodiments of the invention should not be taken as limiting the scope of the invention, which is defined by the appended claims and their description, but rather by the description of the preferred embodiments, as defined by the claims.
[ List of reference numerals ]
2. Optical plate
21. Upper side edge
22. Lower side edge
221. Left horizontal segment
222. Right horizontal segment
223. Curved section
3. Light emitting diode
L distance total length
D 1 distance
D 2 distance
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810798757.8A CN110737130B (en) | 2018-07-19 | 2018-07-19 | Backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810798757.8A CN110737130B (en) | 2018-07-19 | 2018-07-19 | Backlight module and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110737130A CN110737130A (en) | 2020-01-31 |
| CN110737130B true CN110737130B (en) | 2024-12-20 |
Family
ID=69235200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810798757.8A Active CN110737130B (en) | 2018-07-19 | 2018-07-19 | Backlight module and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110737130B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117496836A (en) | 2023-02-10 | 2024-02-02 | 武汉华星光电技术有限公司 | Backlight panel |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208421468U (en) * | 2018-07-19 | 2019-01-22 | 瑞仪(广州)光电子器件有限公司 | Backlight module and display device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2789258B1 (en) * | 1999-02-01 | 2001-03-30 | E C T Ind | LIGHT SOURCE WITH LIGHT EMITTING DIODES |
| KR101359673B1 (en) * | 2008-06-19 | 2014-02-07 | 삼성전자주식회사 | Planar light source and backlight unit comprising the same |
| JP5359105B2 (en) * | 2008-08-07 | 2013-12-04 | エプソンイメージングデバイス株式会社 | LIGHTING DEVICE, ELECTRO-OPTICAL DEVICE, AND ELECTRONIC DEVICE |
| DE102010023956A1 (en) * | 2010-06-16 | 2011-12-22 | Osram Opto Semiconductors Gmbh | light source |
| TWI454798B (en) * | 2011-04-20 | 2014-10-01 | Innolux Corp | Direct type backlight module and display device using the same |
| JP6377953B2 (en) * | 2013-05-20 | 2018-08-22 | 四国計測工業株式会社 | LED lighting module and LED lighting device |
| KR101484466B1 (en) * | 2014-06-20 | 2015-01-20 | 문승호 | Direct Type surface light source device for improved Luminescence and Uniformity |
| KR102381317B1 (en) * | 2014-10-30 | 2022-04-01 | 삼성디스플레이 주식회사 | Backlight unit |
| CN105867013A (en) * | 2015-01-24 | 2016-08-17 | 鸿富锦精密工业（深圳）有限公司 | Display device and light source module |
| TWI636302B (en) * | 2015-05-29 | 2018-09-21 | 國際液晶有限公司 | Display |
-
2018
- 2018-07-19 CN CN201810798757.8A patent/CN110737130B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208421468U (en) * | 2018-07-19 | 2019-01-22 | 瑞仪(广州)光电子器件有限公司 | Backlight module and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110737130A (en) | 2020-01-31 |
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