WO2004040362A1 - Module retroeclaire - Google Patents
Module retroeclaire Download PDFInfo
- Publication number
- WO2004040362A1 WO2004040362A1 PCT/CN2003/000009 CN0300009W WO2004040362A1 WO 2004040362 A1 WO2004040362 A1 WO 2004040362A1 CN 0300009 W CN0300009 W CN 0300009W WO 2004040362 A1 WO2004040362 A1 WO 2004040362A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- guide plate
- light guide
- lamp tube
- backlight module
- arc surface
- Prior art date
Links
Classifications
-
- 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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
Definitions
- the present invention relates to a backlight module, and more particularly, to a backlight module capable of further reducing the thickness and weight of a liquid crystal display device.
- the backlight module 1 in the conventional liquid crystal display device S is mainly composed of a glass panel 2, a light guide plate 4, and two symmetrical side-type lighting groups 6. Components such as a diffusion sheet and a light-enhancing sheet are further provided above the glass panel 2, and components such as a reflection sheet are further provided below the light guide plate 4, which are omitted and not shown in this figure.
- the lighting lamp group 6 includes two lighting lamps 6a, 6b and a reflecting cover 6c arranged side by side. The light emitted by the two lighting lamps 6a, 6b can directly enter the light guide plate 4 or pass through the reflecting cover 6c. The light is reflected into the light guide plate 4 and can be absorbed and scattered through a plurality of optical network points (not shown) located at the bottom of the light guide plate 4.
- the diameter of the two lighting lamps 6a, 6b generally used is 2.4 ⁇ .
- the two lighting lamps 6a, 6b must be spaced a certain distance from each other to prevent light or light energy from being absorbed by the two lighting lamps 6a, 6b, thereby greatly reducing the brightness of the light entering the light guide plate 4,
- the lighting tubes 6a and 6b must also maintain a certain distance from the reflector 6c to ensure the reflection effect of light. Therefore, in the conventional backlight module 1, the thickness tl of the light guide plate 4 is usually 8 mm.
- the backlight module 10 can solve the problem of excessive thickness of the light guide plate.
- the backlight module 10 also has a glass panel 2, a light guide plate 4, and two symmetrical side-type illumination lamps 6 ′.
- the illumination lamp group 6 ' includes two obliquely arranged illumination lamp tubes 6a and 6b.
- the thickness of the reflection cover 6'c can be reduced, and the thickness t2 of the light guide plate 4 of the backlight module 10 can be reduced to 6 mm.
- the design in thickness and weight needs to be further improved.
- the backlight modules of the two conventional liquid crystal display devices as described above although sufficient illumination brightness can be achieved, the problem of excessive thickness cannot be effectively overcome.
- the object of the present invention is to provide a backlight module.
- the present invention basically adopts the features detailed below to solve the above-mentioned problems. That is, the present invention is applicable to a liquid crystal display device and includes a glass panel; a light guide plate is provided below the glass panel and has a connection side; and a lighting unit is the connection provided on the light guide plate The side, and has a reflecting cover, a first lamp tube and a second lamp tube, the first lamp tube and the second lamp tube are covered by the reflecting cover, wherein the first lamp tube to the light guide plate The vertical distance of the connecting side is greater than the vertical distance of the connecting side of the second lamp tube to the light guide plate, and the reflecting cover is composed of multiple curved surfaces connected together to form the first lamp tube. And the light from the second lamp tube is reflected into the light guide plate, so the light guide plate and the lighting lamp group have a reduced thickness.
- the reflecting cover is sequentially composed of an elliptical curved surface, a first circular curved surface, a second circular curved surface, a third circular curved surface, and a plane connection.
- the elliptic curved surface and the plane are connected to the connecting side of the light guide plate.
- the first lamp tube is located inside the first arc surface.
- the second lamp tube is located inside the third arc surface.
- the first circular arc surface, the second circular arc surface, and the third circular arc surface are further composed of a plurality of micro circular arc surfaces.
- the bottom of the light guide plate further has a plurality of optical dots for absorbing and scattering the light entering the light guide plate.
- the reflecting cover is made of a stainless steel material.
- the present invention further includes an optical film, which is disposed below the light guide plate.
- the present invention further includes a diffusion sheet provided above the glass panel.
- the present invention further includes a light enhancement sheet, which is provided above the diffusion sheet.
- the light guide plate is made of an acrylic material.
- FIG. 1 is a schematic perspective view showing a conventional backlight module.
- FIG. 2 is a schematic front view illustrating another conventional backlight module.
- FIG. 3 is a schematic front view showing a backlight module of the present invention.
- FIG. 4 is a schematic front view showing the lighting unit according to FIG. 3.
- Fig. 5 is a model showing the relative positional relationship among components in the lighting unit of the present invention.
- 130 ⁇ illumination lamp group of the present invention 132 ⁇ reflection cover; 134 ⁇ first lamp tube;
- the backlight module in the liquid crystal display device of the present invention has a structure as shown in FIG. 3 and FIG. 4, so that the thickness of the backlight module can be made without affecting the brightness (illumination brightness) of the backlight module. And weight reduction, thereby achieving the purpose of reducing the thickness and weight of the liquid crystal display device.
- the backlight module 100 of the present invention mainly includes a glass panel 110, a light guide plate 120, and two illumination lamp groups 130.
- the light guide plate 120 is disposed below the glass panel 110 and has two connecting side edges 122.
- the two connecting side edges 122 are located on opposite sides of the light guide plate 120.
- the two lighting groups 130 are respectively disposed on the two connecting sides 122.
- the main feature of the backlight module 100 of the present invention is to improve the structural design of the illumination lamp group 130 and the arrangement manner of the illumination lamp tube thereof, so that the thickness of the light guide plate 120 is reduced accordingly.
- the lighting lamp group 130 includes a reflecting cover 132, a first lamp tube 134 and a second lamp tube 136, wherein the first lamp tube 134 and the second lamp tube 136 are lighting lamp tubes with a diameter of 2.4 mm.
- the first lamp tube 134 and the second lamp tube 136 are covered by a reflecting cover 1 32.
- the vertical distance between the first lamp tube 134 and the connecting side 122 of the light guide plate 120 is greater than the vertical distance between the second lamp tube 136 and the connecting side 122 of the light guide plate 120.
- the reflecting cover 132 is composed of a plurality of curved surfaces connected together, and is used to reflect the light emitted by the first lamp tube 134 and the second lamp tube 136 to the light guide plate 120.
- the reflector 132 is sequentially composed of an elliptical curved surface 1301, a first circular curved surface 1302, a second circular curved surface 1303, a third circular curved surface 1304, and a plane 1305.
- the elliptic curved surface 1301 and the flat surface 1305 are connecting side edges 122 connected to the light guide plate 120.
- the first lamp tube 134 is located inside the first arc surface 1302, and the second lamp tube 136 is located inside the third arc surface 1 304.
- the first arc curved surface 1302, the second arc curved surface 1303, and the third arc curved surface 1304 of the reflector 132 are further composed of a plurality of micro arc curved surfaces (not shown).
- the purpose of using the elliptical curved surface 1301 is also to enhance the light reflection effect.
- the reflector 132 of the present invention is made of stainless steel (SUS304), so it can be easily processed or formed into a structure as described above.
- the illumination brightness in the light guide plate 120 will not be reduced, and in combination with the relative positional relationship and setting method of the first lamp tube 134 and the second lamp tube 136, The thickness of the illumination lamp group 130 and the thickness t3 of the light guide plate 120 are reduced.
- a 3 1.0 ⁇ 1.5mm
- t3 it is 4mm, which is much smaller than the conventional t1 (8mm) and t2 (6mm).
- the brightness of the light in the light guide plate 120 will not decrease.
- the thickness of the light guide plate 120 can be certainly reduced, and the thickness of the liquid crystal display device can be effectively reduced.
- the design of the present invention is to reduce the thickness of the backlight module and achieve the purpose of reducing the thickness. Moreover, without affecting the optical brightness of the backlight module, the disadvantages of two lamps in the conventional lighting lamp group side by side are eliminated, and the alternative is adopted. The two lamps are arranged obliquely. At the same time, the relative positional relationship and dimensional distance between the components must be accurately obtained to obtain a thin and high-brightness liquid crystal display device product.
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)
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003301699A AU2003301699A1 (en) | 2002-11-01 | 2003-01-08 | A backlight modular |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNB02150332XA CN100365481C (zh) | 2002-11-01 | 2002-11-01 | 背光模块 |
CN02150332.X | 2002-11-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004040362A1 true WO2004040362A1 (fr) | 2004-05-13 |
Family
ID=32182027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2003/000009 WO2004040362A1 (fr) | 2002-11-01 | 2003-01-08 | Module retroeclaire |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN100365481C (zh) |
AU (1) | AU2003301699A1 (zh) |
WO (1) | WO2004040362A1 (zh) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0854318A1 (de) * | 1997-01-15 | 1998-07-22 | Siemens Aktiengesellschaft | Flachbildschirm |
JP2000010096A (ja) * | 1998-06-23 | 2000-01-14 | Hitachi Ltd | 液晶表示装置 |
CN1285525A (zh) * | 1999-08-20 | 2001-02-28 | 国际商业机器公司 | 液晶显示器、背景光单元、以及用于背景光单元的荧光管 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0990135A (ja) * | 1995-09-26 | 1997-04-04 | Buraito Kenkyusho:Kk | 液晶ディスプレイ用バックライト |
JP4558874B2 (ja) * | 1999-12-17 | 2010-10-06 | ティーピーオー ホンコン ホールディング リミテッド | 表示装置の照明装置 |
JP2001216826A (ja) * | 2000-02-03 | 2001-08-10 | Ichikoh Ind Ltd | カラー液晶表示装置用のバックライト |
JP2001351425A (ja) * | 2000-06-08 | 2001-12-21 | Fujitsu Ltd | バックライト装置及び液晶表示装置 |
CN2877307Y (zh) * | 2006-04-29 | 2007-03-14 | 昆明市三机通用设备厂 | 一种面带熟成机 |
-
2002
- 2002-11-01 CN CNB02150332XA patent/CN100365481C/zh not_active Expired - Lifetime
-
2003
- 2003-01-08 AU AU2003301699A patent/AU2003301699A1/en not_active Abandoned
- 2003-01-08 WO PCT/CN2003/000009 patent/WO2004040362A1/zh not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0854318A1 (de) * | 1997-01-15 | 1998-07-22 | Siemens Aktiengesellschaft | Flachbildschirm |
JP2000010096A (ja) * | 1998-06-23 | 2000-01-14 | Hitachi Ltd | 液晶表示装置 |
CN1285525A (zh) * | 1999-08-20 | 2001-02-28 | 国际商业机器公司 | 液晶显示器、背景光单元、以及用于背景光单元的荧光管 |
Also Published As
Publication number | Publication date |
---|---|
AU2003301699A1 (en) | 2004-05-25 |
CN100365481C (zh) | 2008-01-30 |
CN1493902A (zh) | 2004-05-05 |
AU2003301699A8 (en) | 2004-05-25 |
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