TW200532316A - Backlight module of direct type point light source and liquid crystal display device using the same - Google Patents

Backlight module of direct type point light source and liquid crystal display device using the same Download PDF

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Publication number
TW200532316A
TW200532316A TW093108762A TW93108762A TW200532316A TW 200532316 A TW200532316 A TW 200532316A TW 093108762 A TW093108762 A TW 093108762A TW 93108762 A TW93108762 A TW 93108762A TW 200532316 A TW200532316 A TW 200532316A
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Taiwan
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light source
point light
backlight module
dots
patent application
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TW093108762A
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Chinese (zh)
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TWI247176B (en
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Chen-Pin Hung
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Chi Mei Optoelectronics Corp
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Priority to TW093108762A priority Critical patent/TWI247176B/en
Priority to KR1020040113008A priority patent/KR101156748B1/en
Priority to JP2005089190A priority patent/JP4807609B2/en
Priority to US11/090,646 priority patent/US7152988B2/en
Publication of TW200532316A publication Critical patent/TW200532316A/en
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Publication of TWI247176B publication Critical patent/TWI247176B/en

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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
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • 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
    • G02F1/133604—Direct backlight with lamps
    • 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

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

Abstract

The present invention relates to a liquid crystal display (LCD) device, which includes a LCD panel having a liquid crystal material sandwiched by two substrates; a backlight module disposed beneath the LCD panel; and a display device housing for accommodating the LCD panel and the backlight module. The backlight module is of a direct type point light source, which includes a plurality of point light sources, a reflector, a diffuser and multiple layers of optical films. The reflector has a plurality of apertures, and each aperture corresponds to a respective point light source such that light of the point light source can fully penetrate through the apertures to project on the diffuser. The diffuser has a plurality of radial mesh points randomly distributed, and there is a center point among the randomly distributed radial mesh points, in which at least one point light source corresponds to the center point of the randomly distributed radial mesh points.

Description

200532316 五、發明說明（1) 【發明所屬之技術領域】 本發明係關於一種點光源背光模組，更特別係應用於液 晶顯不裔之直下式點光源背光板組。 【先前技術】 如第1圖所示，其顯示習用液晶顯系器（LCD)裝置之結 構。一般而言，前述液晶顯示器裝置包括一液晶顯示器面 板1 0 ’其包括兩基板中間設有液晶材料、一背光模組2 〇配 置於前述液晶顯示器面板1 0之下方、以及外殼1 1及1 2。 前述背光模組2 0係配置以將一光源所發出之光線，均勻 的分配至前述液晶面板1 0之表面上。用於液晶顯示器之背 光模組2 0 —般可分為：直下光源型式以及邊緣光源型式。 請參考第2圖，其顯示一種直下式背光模組2 1，係沿著 第1圖中剖面線2-2之剖面視圖。前述直下式背光模組21包 括一外殼70，其具有一反射片60配置於其底部表面，以及 諸如冷陰極管之類的燈管5 0，位於其底部、一擴散片4 0位 於前述外殼7〇上、以及稜鏡片30配置於前述擴散片40上。 請參考第3圖，其顯示一種側邊式背光模組2 2，係沿著 第1圖中剖面線2 -2之剖面視圖。前述側邊式背光模組2 2包 括一導光板80、一燈管50加裝於前述導光板80之至少一側 邊、以及一 U形反射器6 1環繞前述燈管5 〇。前述反射器6 1 之一開口部分係固定於前述導光板8〇之側邊，一反射片6〇 係固定於前述導光板80之底部，一擴散片4〇固定於前述導 光板80上，且棱鏡片30係固定於前述擴散片4〇上。因為前 述燈管50係配置於前述導光板8〇之邊緣，故前述LCD之厚200532316 V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a point light source backlight module, and more particularly, it is applied to a direct type point light source backlight panel set of liquid crystal display. [Prior Art] As shown in Fig. 1, it shows the structure of a conventional liquid crystal display (LCD) device. Generally speaking, the aforementioned liquid crystal display device includes a liquid crystal display panel 10 ′, which includes a liquid crystal material disposed between two substrates, a backlight module 20 disposed below the aforementioned liquid crystal display panel 10, and housings 1 1 and 1 2 . The aforementioned backlight module 20 is configured to evenly distribute light emitted from a light source onto the surface of the aforementioned liquid crystal panel 10. The light module 20 used for the back of liquid crystal displays can be divided into: straight-down light source type and edge light source type. Please refer to FIG. 2, which shows a direct type backlight module 21, which is a cross-sectional view taken along the section line 2-2 in FIG. 1. The aforementioned direct type backlight module 21 includes a casing 70 having a reflecting sheet 60 disposed on a bottom surface thereof, and a lamp tube 50 such as a cold cathode tube, located at the bottom thereof, and a diffusion sheet 40 located in the aforementioned casing 7 The upper surface and the diaphragm 30 are disposed on the diffusion sheet 40. Please refer to FIG. 3, which shows a side-type backlight module 22, which is a cross-sectional view taken along the section line 2-2 in FIG. The aforementioned side-type backlight module 22 includes a light guide plate 80, a lamp tube 50 attached to at least one side of the light guide plate 80, and a U-shaped reflector 61 surrounding the lamp tube 50. One of the openings of the reflector 61 is fixed to the side of the light guide plate 80, a reflection sheet 60 is fixed to the bottom of the light guide plate 80, and a diffusion sheet 40 is fixed to the light guide plate 80, and The prism sheet 30 is fixed to the diffusion sheet 40. Because the aforementioned lamp tube 50 is disposed at the edge of the aforementioned light guide plate 80, the thickness of the aforementioned LCD

200532316 五、發明說明（2) 度便得以降低。 ，側邊式背光模組相比較，直下式背光模組之優點為亮 度高，光線行進方向直接進顯示區，不須導光板產生光強 度之損失’因不須導光板，故可降低成本。然而，習用之 直下式冷陰極管（CCFL)背光模組仍具有下列之問題： 1·色飽和度不佳：紅（r)，綠（G)，藍（b)等三色之光頻譜 過大’目前之彩色濾光片（color f i lter)無法濾出很純之 色光（第4圖），約72% NTSC規範之色域（co i〇r gamma); 2·反應時間慢：反應時間大於數個毫秒（mini second)，其乃受限於燈管發光機制之關係； 3·受周圍溫度影響大··冷陰極管（ccFL)於特定溫度下方 有隶佳之發光效率’其光發效率受周圍溫度之影響很大； 4·高電壓驅動：冷陰極管（CCFL)驅動電壓大於1〇〇〇v ; 及 ， 5·不符合環保需求：冷陰極管（CCFL)使用汞。 是以’業者因而發展出直下式發光二極體（led)背光模 組，以解決前述問題。與直下式冷陰極管（CCFL)背光模組 相比較，直下式發光二極體（LED)背光模組之優點為： 1·色域（color gamma)大：紅（R)，綠（G)，藍（B)等三色 之光頻谱較集中’目前之彩色濾、光片（color filter)極易 濾出很純之色光（第5圖），約100 %之NTSC規範之色域 (color gamma)； 2 ·反應日寸間快·反應時間大於數個奈秒（n a π ο second )；200532316 V. Description of invention (2) The degree is reduced. Compared with the side-type backlight module, the advantage of the direct-type backlight module is that the brightness is high, and the light traveling direction directly enters the display area, without the loss of light intensity caused by the light guide plate. As the light guide plate is not required, the cost can be reduced. However, the conventional CCFL backlight modules still have the following problems: 1. Poor color saturation: red (r), green (G), blue (b) and other three-color light spectrum is too large 'The current color filter (color fi lter) cannot filter out very pure color light (Figure 4), about 72% of the NTSC standard color gamut (co i〇r gamma); 2. Slow response time: response time is greater than Several milliseconds (mini second), which is limited by the relationship between the light emitting mechanism of the lamp; 3. Affected by the ambient temperature; · The cold cathode tube (ccFL) has a very good luminous efficiency under a specific temperature. The influence of ambient temperature is great; 4. High-voltage drive: The driving voltage of the cold cathode tube (CCFL) is greater than 1000v; and, 5. Not meeting environmental protection requirements: The cold cathode tube (CCFL) uses mercury. Therefore, the industry has developed a direct-type light-emitting diode (LED) backlight module to solve the aforementioned problems. Compared with direct-lit cold-cathode tube (CCFL) backlight modules, the advantages of direct-lit light-emitting diode (LED) backlight modules are: 1. Large color gamut: red (R), green (G) , Blue (B) and other three-color light spectrum is more concentrated 'Current color filters, color filters (filters) are very easy to filter out very pure color light (Figure 5), about 100% of the NTSC standard color gamut ( color gamma); 2; fast response time; response time greater than several nanoseconds (na π ο second);

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3.不受周圍溫度影響； 4·低驅動電壓··紅光發光二極體（LED)之驅動電壓為 2〜3V丄藍、綠光發光二極體（LED)之驅動電壓為3〜5V ;及 5·符合環保需求··發光二極體（LED)無須使用汞。 有鑑於此，直下式發光二極體（LED)背光模組業已成為 液晶顯示器（LCD)裝置之主要趨勢。3. Not affected by ambient temperature; 4 · Low driving voltage ·· The driving voltage of the red light emitting diode (LED) is 2 ~ 3V 丄 The driving voltage of the blue and green light emitting diode (LED) is 3 ~ 5V And 5. Meet environmental requirements. Light emitting diodes (LEDs) do not require mercury. In view of this, direct-type light-emitting diode (LED) backlight modules have become a major trend in liquid crystal display (LCD) devices.

由此可知，直下式冷陰極管（CCFL)背光模組為一種線光 源。本發明除改良使用於直下式冷陰極管（CCFL)背光模組 之光源外。亦改良直下式冷陰極管（CCFL)背光模組之擴散 板，成為使用發光二極體（LED)為點光源及一輻射狀亂數 分布網點之擴散板所構成之直下式發光二極體（led )背光 模、、且此外本务明亦可使用汞燈或鹵素燈為點光源再加 上一輻射狀亂數分布網點之擴散板等，構成直下式汞燈背 光模組或直下式_素燈背光模組。 【發明内容】 ^發明之目的係提供一種液晶顯示器，包括：一液晶顯 示器面板，其中前述之面板包括兩基板間夾設一液晶材 料；=背光模組配置於前述液晶顯示器面板之下方；以及 一顯不器外殼’内含前述液晶顯示器面板及前述背光模 組；、其中前述背光模組為一種直下式點光源背光模組，以 取代目前所使用之直下式冷陰極管（CCFL)背光模組。 為達上述目的，發明一直下式點光源背光模組，包括： 複^個點光源；一反射板，前述反射板具有複數個開孔， 且每一開孔對應於相對應之點光源；一擴散板，前述擴散It can be seen that the direct type cold cathode tube (CCFL) backlight module is a linear light source. In addition to improving the light source used in a direct type cold cathode tube (CCFL) backlight module, the present invention. The diffusion plate of the direct-type cold-cathode tube (CCFL) backlight module has also been improved to become a direct-type light-emitting diode (LED) as a point light source and a radiating plate with a random number of dots. led) backlight mode, and in addition, it is also possible to use a mercury lamp or a halogen lamp as the point light source, plus a radiant random number distribution dot diffuser, etc. to form a direct type mercury lamp backlight module or direct type Light backlight module. [Summary of the Invention] ^ The purpose of the invention is to provide a liquid crystal display, including: a liquid crystal display panel, wherein the aforementioned panel includes a liquid crystal material sandwiched between two substrates; = a backlight module is disposed below the aforementioned liquid crystal display panel; and The display case 'contains the aforementioned liquid crystal display panel and the aforementioned backlight module; wherein the aforementioned backlight module is a direct-type point light source backlight module to replace the direct-type cold-cathode tube (CCFL) backlight module currently used . In order to achieve the above object, the invention provides a direct-type point light source backlight module including: a plurality of point light sources; a reflecting plate, the reflecting plate having a plurality of openings, and each opening corresponds to a corresponding point light source; Diffuser

200532316 五、發明說明（4) *^ 板具有複數個輻射狀亂數分布網點；其中至少一點光源對 ^於輻射狀亂數分布網點的中心。前述直下式點光源背光 才^組’其中前述複數個點光源包括發光二極體（LED )、汞 蚯、鹵素燈。前述輻射狀亂數網點中心控制面積遮蔽率即 控制網點之密度改變網點離心方向間距和切線方向間距， 再配合網點徑向距離的大小，來控制其相對面積的遮蔽率 及=位置並做亂數分佈處理。所以輻射狀亂數網點分布係 近前述點光源處密或直徑大，遠前述點光源處疏或直徑 ^，而且前述之輻射狀亂數網點包括：單點、複數點或單 设數點的複合組合；再者前述輻射狀亂數網點係配置於前 述擴散板之上表面或下表面或部分上表面部分下表面；前 =輻射狀亂數網點包括凸點、凹槽或部分凸點部分凹槽複 二方式配置於擴散板上。前述擴散板係由透光或半透光材 貝製成，選自如玻璃，壓克力樹脂（AcryHc Resin)， ㈣A，PC，Arton &PET等材料。前述輻射狀亂數網點為反% 、物貝，選自鈦系化合物，石夕系化合物及硫酸鋇等。 根據本發明的目的，一種直下式點光源背光模組的製作 j，前述方法包括步驟：形成複數個點光源；形成一具 複數個開孔的反射板，且每一開孔對應 ^形成一擴散板，於前述擴散板上配置複數 布網點；其中至少一點光源對應於前述輻射狀亂數分 、、罔點的中心，其中珂述複數個點光源包括發光二極體 ED)、汞燈、鹵素燈。前述輻射狀亂數網點分布係近前 點光源處密或直徑大，遠前述點光源處疏或直徑小；前200532316 V. Description of the invention (4) The plate has a plurality of radial random number distribution dots; at least one point of the light source is at the center of the radial random number distribution dots. The above-mentioned direct-type point light source backlight is only one group. The plurality of point light sources include a light emitting diode (LED), a mercury lamp, and a halogen lamp. The aforementioned shielding ratio of the center of the radial random dots is to control the density of the dots to change the pitch of the dots in the centrifugal direction and the distance in the tangential direction. In addition to the size of the radial distance of the dots, the masking rate and position of the relative area and the random number Distribution processing. Therefore, the distribution of radial random dots is dense or large near the point light source, and sparse or diameter far away from the point light source, and the aforementioned radial random dots include: a single point, a complex point, or a composite of a single set of several points. Combination; the aforementioned radial random dots are arranged on the upper or lower surface of the diffuser plate or part of the upper surface part of the lower surface; front = radial random dots include bumps, grooves or partial bumps and partial grooves The second method is arranged on the diffusion plate. The diffusion plate is made of a light-transmitting or translucent material, and is selected from materials such as glass, acrylic resin (AcryHc Resin), inA, PC, Arton & PET and the like. The aforementioned radial random number of dots are inverse%, shellfish, and are selected from titanium-based compounds, stone eve-based compounds, barium sulfate, and the like. According to the purpose of the present invention, a method for manufacturing a direct type point light source backlight module is described. The foregoing method includes the steps of: forming a plurality of point light sources; forming a reflective plate with a plurality of openings, and each opening correspondingly forms a diffusion. A plurality of dots are arranged on the diffusion plate; at least one point of the light source corresponds to the center of the aforementioned radial random points, and points, wherein the plurality of point light sources include a light emitting diode (ED), a mercury lamp, and a halogen light. The aforementioned radial random dot distribution is close to the front, and the point light source is dense or large in diameter, and far away, the point light source is sparse or small in diameter;

200532316200532316

平點 述輻射狀 組合；而 表面或下 透光或半 (Acrylic 前述輻射 化合物及 凸點於擴 槽，再於 為了讓 顯，下文 細說明如 【實施方 亂數網點 且前述輻 表面或部 透光材質 Resin) 狀亂數網 硫酸鋇等 散板上。 凸點或凹 本發明之 特舉本發 下： 式】 射狀亂數網 分上表面部 製成，選自 ，PMMA ， PC 點為反射物 ;而且輻射 其中將前述 槽網目印刷 上述和其他 明較佳實施 攸数點或早複數點的複合 點係配置於前述擴散板之上 分下表面。前述擴散板係由 如玻璃，壓克力樹脂 ，Arton及PET等材料；其中 貝，選自鈦糸化合物，石夕系 狀亂數網點係經由網目印刷 擴散板模製成具有凸點或凹 或塗層前述網點。 目的、特徵、和優點能更明 例，並配合所附圖示，作詳 凊參考第6圖為應用本發明之背光模組丨2 〇之 部份示意圖。前述液晶顯示器100包括一液晶顯;器面 板110以及一背光模組丨20。前述液晶顯示器面板具有 兩透明基板1 1 2、1 1 4，以及液晶材料丨丨6配置於其中了前 述背光模組1 20係直下式點光源背光模組，作用^提供一 $源裝置，用於整個顯示區域中，均勻的發射光線並照亮 前述液晶顯示器面板11 〇。前述背光模組包括複數個點光 源150、一反射板160、一擴散板180、以及多層之光學 膜0 反射板1 60具有複數個反射板開孔丨62，每一反射板開孔 1 6 2對應於相對應之點光源丨5 〇，俾使點光源丨5 〇之光線得The flat combination is described as a radiant combination; the surface is transparent or semi-transparent (Acrylic, the aforementioned radiant compound and bumps are enlarged in the groove, and for the sake of visibility, the following detailed description is as follows: Light material Resin) -shaped random number nets such as barium sulfate and other scattered boards. The convex or concave special feature of the present invention is as follows: Formula] The upper surface of the random number mesh is made of, selected from, PMMA, and the PC point is a reflector; The composite points with multiple points or early multiple points are preferably arranged on the lower surface of the diffusion plate. The aforementioned diffuser plate is made of materials such as glass, acrylic resin, Arton, and PET; among them, shellfish is selected from titanium hafnium compounds, and stone-like irregular dots are molded through a mesh printing diffuser plate to have convex or concave or The aforementioned dots are coated. The purpose, features, and advantages can be more clearly exemplified, and in conjunction with the accompanying drawings, for details, refer to FIG. 6 for a partial schematic diagram of a backlight module 丨 2 〇 to which the present invention is applied. The aforementioned liquid crystal display 100 includes a liquid crystal display; a panel 110 and a backlight module 20. The aforementioned liquid crystal display panel has two transparent substrates 1 1 2, 1 1 4 and a liquid crystal material 丨 丨 6 arranged in the aforementioned backlight module 1 20 series of direct-type point light source backlight module. The function is to provide a $ source device for The entire display area emits light uniformly and illuminates the aforementioned liquid crystal display panel 11. The aforementioned backlight module includes a plurality of point light sources 150, a reflecting plate 160, a diffusing plate 180, and a multilayer optical film. The reflecting plate 1 60 has a plurality of reflecting plate openings 62, and each reflecting plate opening 1 6 2 Corresponding to the corresponding point light source 丨 5 〇, so that the light of the point light source 丨 5 〇 get

00844.ptd00844.ptd

第9頁 200532316 五、發明說明（6) 以完全穿越前述反射板開孔1 62而照射擴散板1 8 〇，被擴散 板1 8 0反射之光線返回反射板〗6 0後，再反射至擴散板 1 8 0。根據不同型態之點光源1 5 0，反射板1 6 0可設置於點 光源1 5 0之上方，下方或同一水平面，唯需使點光源丨5 〇之 光線得以完全穿越前述開孔1 6 2而照射擴散板1 8 0。並透過 此擴散板1 8 0使部分光穿透部分光反射，前述反射光經反 射板再反射至輻射狀亂數網點分布的擴散板丨8〇，再重新 利用以提昇整體區域之均齊度（unif ormity) 〇 參考第7圖為根據本發明之實施例之直下式點光源背光 模組2 2 0之示意圖。前述直下式點光源背光模組2 2 〇包括複 數個點光源2 5 0，一反射板2 6 0具有複數個反射板開孔 2 62 ’ 一擴散板2 80具有複數個輻射狀亂數網點2 82分布其 上’同時前述之輻射狀亂數網點282於擴散板28 0上之分布 須有複數個輻射狀亂數網點中心2 9 〇，假設一點光源2 5 0對 應於一輻射狀亂數網點中心290因為點光源250之光強度分 佈不均，中間強旁邊弱，所以為解決發光源強弱分佈不 均’本發明設計輻射狀亂數網點2 8 2分布有一輻射狀亂數 網點中心2 9 0以抑制中間強光處，所以輻射狀亂數網點分 布係近可述點光源處密或直徑大，遠前述點光源處疏或直 控小’即以輻射狀亂數網點中心2 9 0控制面積遮蔽率即控 制網點之密度改變網點離心方向間距和切線方向間距，再 配合網點徑向距離的大小，來控制其相對面積的遮蔽率及 點位置並做亂數分佈處理。 上述實施例為一點光源2 5 0對應於一輻射狀亂數網點中Page 9 200532316 V. Description of the invention (6) The diffuser plate 1 80 is illuminated through the opening 162 of the reflector plate, and the light reflected by the diffuser plate 180 returns to the reflector plate 60, and then reflected to the diffuser. Board 1 8 0. According to the different types of point light sources 150, the reflective plate 160 can be installed above, below or on the same horizontal plane as the point light sources 150. Only the light from the point light sources 5 through 0 can completely pass through the aforementioned openings 16 2 and irradiated the diffuser plate 180. Part of the light is transmitted through the diffuser plate 180, and part of the light is reflected. The reflected light is reflected by the reflector plate to the diffuser plate with a random number of dots, and then reused to improve the uniformity of the entire area. (Unif ormity) 〇 Referring to FIG. 7, it is a schematic diagram of a direct type point light source backlight module 2 2 0 according to an embodiment of the present invention. The aforementioned direct type point light source backlight module 2 2 〇 includes a plurality of point light sources 2 50, a reflection plate 2 60 has a plurality of reflection plate openings 2 62 ′, a diffusion plate 2 80 has a plurality of radial random dots 2 82 is distributed on it, and the aforementioned radial random dots 282 on the diffuser plate 28 0 must have a plurality of radial random dots centers 2 9 0, assuming that a point light source 2 50 corresponds to a radial random dots The center 290 has uneven light intensity distribution of the point light source 250, and is weak next to the middle. Therefore, in order to solve the uneven distribution of the light source strength, the invention design a radial random number of dots 2 8 2 distributed a radial random number of dots center 2 9 0 In order to suppress the middle strong light, the distribution of the radial random dots can be described as close to the point light source, or the diameter is large, and far away from the point light source is sparse or directly controlled is small. The shading rate is to control the density of the dots to change the centrifugal direction pitch and the tangential direction pitch of the dots, and then to match the radial distance of the dots to control the shading rate and dot position of the relative area and do random number distribution processing. In the above embodiment, the point light source 2 50 corresponds to a radial random number of dots.

第10頁 200532316 五、發明說明（7) 心2 90為例’本發明亦適用於複數個點光源25〇對應於一個 輕射狀亂數網點中心290，如第8圖。其中前述複數個點光 源250包括發光二極體（LED)、汞燈、鹵素燈；而且前述輻 射狀亂數網點2 8 2係配置於前述擴散板2 8 〇之上表面或下表 面或部分上表面部分下表面；前述輻射狀亂數網點2 8 2包 括凸點、凹槽或部分凸點部分凹槽複合方式配置於擴散板 280上。前述擴散板280係由透光或半透光材質製成，選自 如玻璃’壓克力樹脂（Acrylic Resin)，PMMA，PC，Arton 及PET等材料。前述輻射狀亂數網點28 2為反射物質，選自 鈦系化合物，矽系化合物及硫酸鋇等。 第9 ( a )〜（f )圖為根據本發明實施例之輻射狀亂數網點單 元之輪射狀亂數網點分布。如第9 (a )圖所示前述之輕射狀 亂數網點282於一預定單元面積292(如〇·：[〜h2mm見方單 元）内，僅具有一輻射狀亂數網點2 8 2。如第9 ( b )與第9 ( f ) 圖所示’其係於一預定單元面積2 9 2内，具有兩輻射狀亂 數網點2 8 2 ’其中兩輻射狀亂數網點2 8 2可相連接如圖9 (b) 或分開如圖9 ( f )。如第9 ( c ) - 9 (e )圖所示，其係於一預 疋單元面積2 9 2内，具有複數個輻射狀亂數網點2 8 2其中有 一單元中心網點2 8 2 a，其餘之複數個輻射狀亂數網點繞此 單元中心網點2 8 2 a配置。如此可得，單點之輕射狀亂數網 點、複數點或單複數點的複合組合，如第1 〇 (a) — i 〇 (b )圖 所示。 雖然本發明已以前述較佳實施例揭示，然其並非用以限 定本發明，任何熟習此技藝者，在不脫離本發明之精神和Page 10 200532316 V. Description of the invention (7) Heart 2 90 is taken as an example. The present invention is also applicable to a plurality of point light sources 250 corresponding to a light-emitting random dot center 290, as shown in FIG. The aforementioned plurality of point light sources 250 include a light emitting diode (LED), a mercury lamp, and a halogen lamp; and the aforementioned radial random dots 2 8 2 are arranged on the upper surface or the lower surface or part of the diffusion plate 2 8 0. The lower part of the surface part; the aforementioned radial random dots 2 8 2 include bumps, grooves, or partial bumps and partial grooves, and are arranged on the diffusion plate 280 in a composite manner. The diffusion plate 280 is made of a light-transmitting or semi-light-transmitting material, and is selected from materials such as glass' acrylic resin, PMMA, PC, Arton, and PET. The aforementioned radial random dots 28 2 are reflective materials and are selected from titanium-based compounds, silicon-based compounds, barium sulfate, and the like. Figures 9 (a) ~ (f) are the distributions of the round-shaped random-numbered dots of the radial-shaped random-numbered dot units according to the embodiment of the present invention. As shown in FIG. 9 (a), the aforementioned light-radius random-numbered dots 282 have only one radial random-numbered dots 2 8 2 in a predetermined unit area 292 (such as 0: [~ h2mm square unit). As shown in Figures 9 (b) and 9 (f), 'It is within a predetermined unit area of 2 9 2 and has two radial random dots 2 8 2', of which two radial random dots 2 8 2 may The phases are connected as shown in Figure 9 (b) or separated as shown in Figure 9 (f). As shown in Figs. 9 (c)-9 (e), it is within a predetermined unit area of 2 9 2 and has a plurality of radial random dots 2 8 2 including one central dot 2 8 2 a and the rest A plurality of random radial dots are arranged around the central dot 2 8 2 a of this unit. In this way, the light-shot random number of dots, the complex number of dots, or the composite combination of single and plural dots can be obtained, as shown in Figures 10 (a)-i 0 (b). Although the present invention has been disclosed in the foregoing preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art will not depart from the spirit and scope of the present invention.

00844.ptd 第11頁 200532316 五、發明說明（8) 範圍内，當可作各種之更動與修改。因此本發明之保護範 圍當視後附之申請專利範圍所界定者為準。 00844.ptd 第12頁 200532316 圖式簡單說明 【圖式簡單說明】 第1圖為根據先前技術之液晶顯示器之立體透視展開示 意圖。 第2圖為根據先前技術之直下式背光模組之剖面示意 圖 圖 第3圖為根據先前技術之側邊式背光模組之剖面示意 第4圖為根據直下式冷陰極管背光模組之光頻譜。 ，第5圖為根據直下式發光二極體（led)背光模組之光頻 譜。 之 上圖ΛΛ用本發明實施例之直下式點光源背光模組 /夜日日顯不裔部份示意圖0 之Γ意圖8圖為㈣本發明實施例之直下式點光源背光模組 元1奉:身;』礼ί:據本發明實施例之輻射狀亂數網點單 兀之輻射狀亂數網點分布。 丁 亂數網點之分布示 狀亂數網點之分布 立=1 0 (a)圖為根據本發明單點輻射狀 示：：⑻圖為根據本發明複數點輕射 圖號說明 11 外殼 10 液晶顯示器面板 00844.ptd 第13頁 20053231600844.ptd Page 11 200532316 5. Within the scope of (8), various changes and modifications can be made. Therefore, the protection scope of the present invention shall be determined by the scope of the appended patent application. 00844.ptd Page 12 200532316 Brief description of the drawings [Simplified description of the drawings] Figure 1 is a three-dimensional perspective development view of a liquid crystal display according to the prior art. Fig. 2 is a schematic cross-sectional view of a direct-type backlight module according to the prior art. Fig. 3 is a cross-sectional view of a side-type backlight module according to the prior art. Fig. 4 is an optical spectrum of a direct-type cold-cathode backlight module. . Figure 5 shows the light spectrum of a direct-lit light-emitting diode (LED) backlight module. The above figure ΛΛ uses the direct-type point light source backlight module of the embodiment of the present invention / schematic diagram of the night and day. 0 Γ Intention 8 The picture shows the direct-type point light source backlight module of the embodiment of the present invention. "Body": "Li": According to the embodiment of the present invention, the random random number of dots is distributed. The distribution of random dots shows the distribution of random dots = 0 (a) The figure shows a single-point radial pattern according to the present invention: ⑻ The figure shows the plural dots according to the present invention. Figure 11 illustrates the case 10 liquid crystal display Panel 00844.ptd Page 13 200532316

圖式簡單說明 12 外殼 20 背光模組 21 直下式背光模組 22 側邊式背光模組 30 棱鏡片 40 擴散片 50 燈管 80 導光板 100 液晶顯不裔 110 液晶顯不面板 112 透明基板 114 透明基板 116 液晶材料 150 ^ 2 5 0 點光源 120 、2 2 0 直下式點光源背光模組 160 反射板 162 、2 6 2 反射板開孔 180 > 2 8 0 擴散板 182 、2 8 2 網點 282a 單元中心網點 290 輻射狀亂數網點中 心 292 輻射狀亂數網點單元 00844.ptd 第14頁Brief description of the drawings 12 Housing 20 Backlight module 21 Direct-type backlight module 22 Side-type backlight module 30 Prism lens 40 Diffuser 50 Light tube 80 Light guide plate 100 LCD display panel 110 LCD display panel 112 Transparent substrate 114 Transparent Substrate 116 Liquid crystal material 150 ^ 2 5 0 point light source 120, 2 2 0 direct type point light source backlight module 160 reflector plate 162, 2 6 2 reflector plate opening 180 > 2 8 0 diffuser plate 182, 2 8 2 dots 282a Unit Center Dot 290 Radial Random Dot Center 292 Radial Random Dot Unit 00844.ptd Page 14

Claims (1)

200532316 _案號93108762_年月日__ 六、申請專利範圍 1. 一種直下式點光源背光模組，其包括： ’ 複數個點光源； 一反射板，該反射板具有複數個開孔，且每一開孔對應 於相對應之點光源； 一擴散板，該擴散板具有複數個輻射狀亂數分布網點； 其中至少一點光源對應於該輻射狀亂數分布網點的中心。 2. 依申請專利範圍第1項之直下式點光源背光模組，其中該 複數個點光源係選自由發洗二極體（LED)、汞燈、及鹵素燈 所組成之族群。 3. 依申請專利範圍第1項之直下式點光源背光模組，其中該 輻射狀亂數網點分布係近該點光源處密或直徑大，遠該點 光源處疏或直徑小。 4. 依申請專利範圍第1項之直下式點光源背光模組，其中該 輻射狀亂數網，點於0 . 1〜1. 2 m m見方單元内包括：單點、複數 點或單複數點的複合組合。 5. 依申請專利範圍第4項之直下式點光源背光模組，其中該 輻射狀亂數網點於0. 1〜1. 2mm見方單元内之該複數網點具有 一單元中心網點，其餘之複數個輻射狀亂數網點繞此單元 中心網點配置。200532316 _ Case No. 93108762_year month__ VI. Patent application scope 1. A direct type point light source backlight module, comprising: '' a plurality of point light sources; a reflective plate, the reflective plate has a plurality of openings, and Each opening corresponds to a corresponding point light source; a diffuser plate having a plurality of radial random number distribution network points; at least one point of the light source corresponds to the center of the radial random number distribution network points. 2. The direct-type point light source backlight module according to item 1 of the scope of patent application, wherein the plurality of point light sources are selected from the group consisting of hair washing diodes (LEDs), mercury lamps, and halogen lamps. 3. The direct type point light source backlight module according to item 1 of the scope of patent application, wherein the radial random dot distribution is dense or large near the point light source, and sparse or small near the point light source. 4. The direct-type point light source backlight module according to item 1 of the scope of the patent application, wherein the radial random number of points is in the range of 0.1 to 1.2 mm, and the unit includes: single point, plural points, or plural points. Compound combination. 5. The direct type point light source backlight module according to item 4 of the scope of patent application, wherein the radiant random number of dots is in the range of 0.1 to 1.2 mm square unit, the plurality of dots has a unit center dot, and the remaining plural Random radial dots are arranged around the center dot of this unit. 第15頁 200532316 六、申請專利範圍 6 ·依申請專利範圍第1項之直下式點光源背光模組，其中 該輻射狀亂數網點係配置於該擴散板之上表面或下表面或 部分上表面部分下表面。 7 ·依申請專利範圍第1項之直下式點光源背光模組，其中 該輻射狀亂數網點係由凸點、凹槽或部分凸點部分凹槽複 合方式所組成之族群配置於擴散板上。 8上!： ί:範圍第1項之直下式點光源背光模組，其中 =:=係由透光或半透光材質製成，選自由玻璃，麼克 y；^(AcryilcResin),PMMA,pc5Art〇n^ET ^ 9·依申請專利範圍第1項之直下式 該輻射狀亂數網點為反射物質，選先源\光模組，其中 π厶物及石奋_ 4日《 ^、目由鈦系化合物，矽系 化合物及硫酸鋇所組成之族群 該方法包括 1 0· —種直下式點光源背光模組的 步驟： 衣作方法， 形成複數個點光源； 形成一具有複數個開孔的反射板， 相 對應之點光源； 且母一開孔對應於 複數個輻射狀亂數分 形成一擴散板，於該擴散板上配 布網點； 夏 _44.pt d 第16頁 200532316 六、申請專利範圍 其中至少一點光源對應於該輻射狀亂數分布網點的中 心 〇 11.依申請專利範圍第1 0項之直下式點光源背光模組的製 作方法，其中該複數個點光源係選自由發光二極體（LED) 、汞燈、素燈所組成之族群。 1 2.依申請專利範圍第1 0項之直下式點光源背光模組的製 作方法，其中該輻射狀亂數網點分布係近該點光源處密或 直徑大，遠該點光源處疏或直徑小。 1 3.依申請專利範圍第1 0項之直下式點光源背光模組的製 作方法，其中該輻射狀亂數網點於0 . ；1〜1. 2mm見方單元内 包括：單點、複數點或單複數點的複合組合。 1 4.依申請專利範圍第1 3項之直下式點光源背光模組的製 作方法，其中該輻射狀亂數網點於0 . ：1〜1. 2mm見方單元内 之該複數網點具有一單元中心網點，其餘之複數個輻射狀 亂數網點繞此單元中心網點配置。 1 5.依申請專利範圍第1 0項之直下式點光源背光模組的製 作方法，其中該輻射狀亂數網點係配置於該擴散板之上表 面或下表面或部分上表面部分下表面。Page 15 200532316 6. Scope of patent application 6 · Direct-type point light source backlight module according to item 1 of the patent application scope, wherein the radiant random dots are arranged on the upper surface or lower surface or part of the upper surface of the diffuser plate Part of the lower surface. 7. The direct-type point light source backlight module according to item 1 of the scope of patent application, wherein the radiant random dots are composed of a group of bumps, grooves, or a combination of partial bumps and partial grooves, and are arranged on a diffusion plate. . 8 上!: Ί: The direct type point light source backlight module of the first item in the range, where =: = is made of transparent or semi-transparent material, and is selected from glass, Mok y; ^ (AcryilcResin), PMMA, pc5Art〇n ^ ET ^ 9. According to the direct formula of the first patent application scope, the radiant random number of dots is reflective material, select the source \ light module, of which π 厶 物 and Shi Fen_ 4th "^ 、 目A group consisting of a titanium-based compound, a silicon-based compound, and barium sulfate. The method includes the following steps: 10 direct-type point light source backlight modules: a method of dressing, forming a plurality of point light sources, and forming a plurality of openings. A reflective plate corresponding to a point light source; and an opening in the mother corresponds to a plurality of radial random numbers to form a diffuser plate, and dots are arranged on the diffuser plate; Xia_44.pt d p. 16 200532316 VI. Application In the patent scope, at least one point light source corresponds to the center of the radiant random number distribution network. 11. The method for manufacturing a direct type point light source backlight module according to item 10 of the patent application scope, wherein the plurality of point light sources are selected from Diode (LED), mercury lamp Ajinomoto group consisting lamp. 1 2. The method for manufacturing a direct type point light source backlight module according to item 10 of the scope of patent application, wherein the radiant random dot distribution is dense or large near the point light source, and sparse or large at the far point light source. small. 1 3. The method for manufacturing a direct type point light source backlight module according to item 10 of the scope of patent application, wherein the radiant random number of dots is at 0.; 1 ~ 1.2 mm square unit includes: single point, plural points or A composite combination of singular and plural points. 14. The method for manufacturing a direct type point light source backlight module according to item 13 of the scope of patent application, wherein the radiant random number of dots is at 0 .: 1 ~ 1.2 mm. The plural dots in the square unit have a unit center. The network points, and the rest of the radial random numbers are arranged around the center network point of this unit. 1 5. The method for manufacturing a direct type point light source backlight module according to item 10 of the patent application scope, wherein the radiant random dots are arranged on the upper surface or the lower surface or part of the upper surface and the lower surface of the diffuser plate. 00844.ptd 第17頁 200532316 六、申請專利範圍 16·依申請專利範圍第10項之直下式點光源背光模組的製 作方法，其中該擴散板係由透光或半透光材質製成，選自 由玻璃，壓克力樹脂（Aery 1 ic Resin)，PMMA，pc , Ar ton 及PET所組成之族群。 1 7·依申請專利範圍第1 0項之直下式點光源背光模組的製 作方法’其中該輕射狀亂數網點為反射物質，選自由鈦系 化合物’ >5夕糸化合物及硫酸鎖所組成之族群。 1 8·依申請專利範圍第1 0項之直下式點光源背光模組的製 作方法，其中該輻射狀亂數網點係經由網目印刷凸點於擴 散板上。 ^ 19·依申請專利範圍第10項之直下式點光源背光模組的製 作方法，其中將該擴散板模製成具有凸點或凹槽，再於凸 點或凹槽網目印刷或塗層該網點。 2 0 · —種液晶顯示器，包括： 曰二液晶顯示器面板，*中該面板包括兩基板間夾設-液 晶材料； 一背光模組配置於該液晶顯示器面板之下方；以及 :;示器/卜殼，内含該液晶顯示器面板及該背光模组； y㈣光模組為-直下式點光源背 ，包括： 複數個點光源；00844.ptd Page 17 200532316 VI. Application for Patent Scope 16. The manufacturing method of direct-type point light source backlight module according to item 10 of the patent application scope, wherein the diffuser plate is made of transparent or translucent material. A group of free glass, acrylic resin (Aery 1 ic Resin), PMMA, pc, Ar ton and PET. 17. A method for manufacturing a direct-type point light source backlight module according to item 10 of the scope of the patent application, wherein the light-emitting random dots are reflective materials, and are selected from the group consisting of titanium-based compounds. The group of people. 18. The method for manufacturing a direct type point light source backlight module according to item 10 of the scope of patent application, wherein the radiant random dots are printed on the diffuser plate by mesh printing. ^ 19. The method for manufacturing a direct type point light source backlight module according to item 10 of the application, wherein the diffuser plate is molded with bumps or grooves, and the bumps or grooves are printed or coated with a mesh. Outlets. 2 0 · A liquid crystal display, comprising: a second liquid crystal display panel, wherein the panel includes a liquid crystal material sandwiched between two substrates; a backlight module is disposed below the liquid crystal display panel; and: a display / bu The shell contains the liquid crystal display panel and the backlight module; the Y light module is a direct-type point light source back, including: a plurality of point light sources; 200532316 六、申請專利範圍 一反射板，該反射板具有複數個 於相對應之點光源； u 一擴散板，該擴散板具有複數個_ • ·- ’ 點光源對應於該輻射办射狀亂數分布網點 %亂壑八士 歎分布網點的中 母一開孔對應 其中至少 心 2 1 ·依申請專利範圍第2 〇項之液晶顯 點光源係選自由發光二極體（led) 成之族群。 器 其中該複數個 1燈、及鹵素燈所組 22·依申請專利範圍第2〇項之液晶顯/ 亂數網點分布係接近該點光源處密禾器，其中該輻射狀 源處疏或直徑小。 $直徑大，遠離該點光 23·依申請專利範圍第2〇項之液晶 亂數網點於0·卜1· 2mm見方單元内勺=裔，π其中該輻射狀 單複數點的複合組合。 匕舌·單點、複數點或 2 4 ·依申請專利範圍第2 3項曰- 亂數網點於(^卜^随見方輩/夜1、、、員不器，其中該輻射狀 分*、、姻黜，甘从早兀内之該複數網點具有一單 …·、、八*之複數個輻射狀亂數網點繞此單元中心 網點配置。 25·依申請專利範圍第2〇項之直下式 點光源背光模組，其200532316 6. Scope of patent application: a reflecting plate with a plurality of corresponding point light sources; u a diffuser plate with a plurality of _ • ·-'point light sources corresponding to the radiation random number Distributive dots are randomly distributed in the middle mother's hole of the distributed dots corresponding to at least the center 2 1. The liquid crystal display light source according to Item 20 of the patent application scope is selected from the group consisting of light emitting diodes (LEDs). The device is composed of a plurality of 1 lamps and a halogen lamp. The liquid crystal display / random number dot distribution according to item 20 of the application patent range is close to the dense light source at the point light source, where the radial source is sparse or diameter. small. $ The diameter is large, away from the point of light. 23. According to the liquid crystal of item 20 of the patent application, the random number of dots is in the square unit of 0.2 mm, and the diameter is a complex combination of single and plural points. Dagger tongue · single point, plural point or 2 4 · According to item 23 of the scope of the patent application-Random number network in (^ 卜 ^^ 见方 // 夜 1 ,,,, and erroneous devices, where the radial points are *, , Marriage, from the early Wu of the complex number of outlets has a single ... ,, eight * multiple radial random number of outlets around the center of the unit configuration. 25 · according to the scope of the patent application for the straight-line formula below 20 Point light source backlight module, which 00844.ptd 第19頁 200532316 六、申請專利範圍 中該輻射狀亂數網點係配置於該擴散板之上表面或下表面 或部分上表面部分下表面。 00844.ptd 第20頁00844.ptd Page 19 200532316 VI. In the scope of patent application, the radial random dots are arranged on the upper surface or the lower surface or part of the upper surface and the lower surface of the diffuser plate. 00844.ptd Page 20
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