CN1321344C - LCD device - Google Patents

Abstract

The present invention relates to a liquid crystal display device, comprising: the backlight module is provided with a light source which can emit light rays with a first wavelength; a first substrate having multiple Thin Film Transistors (TFTs) disposed above the backlight module; a fluorescent powder layer located above the first substrate; a color filter arranged above the fluorescent powder layer; a second substrate located above the color filter; and a liquid crystal layer between the first and second substrates, wherein the first wavelength light penetrates the phosphor layer and then reaches the color filter. The backlight emits short wavelength light to excite the fluorescent powder layer to generate white light, and the white light penetrates the color filter to show three primary colors of red, green and blue. Alternatively, the backlight source emits short wavelength light to excite the phosphor layer to directly generate red light, green light or blue light, which can be displayed on the panel of the LCD without color filter.

Description

Translated fromChinese

液晶显示器装置LCD device

技术领域technical field

本发明涉及一种液晶显示器装置，特别是针对一种具有荧光粉层的液晶显示器装置。The invention relates to a liquid crystal display device, in particular to a liquid crystal display device with a phosphor layer.

背景技术Background technique

液晶显示器(Liquid Crystal Display，LCD)是非自发光的显示器，不像等离子显示器(Plasma Panel Display，PDP)、有机电激发光显示器(Organic LightEmitting Diode，OLED)、阴极射线管(Cathode Ray Tube，CRT)可自行发光，LCD需要利用外部光源作为光线来源。Liquid Crystal Display (LCD) is a non-self-illuminating display, unlike plasma display (Plasma Panel Display, PDP), organic electroluminescent display (Organic LightEmitting Diode, OLED), cathode ray tube (Cathode Ray Tube, CRT) It can emit light by itself, and LCD needs to use an external light source as a light source.

目前液晶显示器光源所使用的产品可分为电激发光(Electroluminescence，EL)、发光二极管(Light Emitting Diode，LED)与冷阴极荧光灯(Cold Cathode Florescent Lamp，CCFL)，其中以CCFL与LED应用较为普遍。白光LED作为液晶显示器光源，具有省电、体积小等等优点，目前已广泛使用于行动电话、个人数字助理(Personal Digital Assistant，PDA)、数字相机、数字摄录影机等小型液晶显示器中。At present, the products used for the light source of liquid crystal display can be divided into electroluminescence (EL), light emitting diode (Light Emitting Diode, LED) and cold cathode fluorescent lamp (Cold Cathode Florescent Lamp, CCFL), among which CCFL and LED are more commonly used . As a light source for liquid crystal displays, white LEDs have the advantages of power saving and small size, and have been widely used in small liquid crystal displays such as mobile phones, personal digital assistants (PDA), digital cameras, and digital video cameras.

现有的液晶显示器剖面示意图请见图1所示。背光模块11包含了白光LED111、反射片112、导光板113及扩散板、棱镜片等构件，白光LED111所发射的白光可经由此些构件的组合而向上传到透明玻璃基板12。透明玻璃基板12上有多个薄膜晶体管(TFT)121，经由薄膜晶体管的控制，白光即可穿过液晶层13到达另一透明玻璃基板14上的彩色滤光片(CF)141。白光经过彩色滤光片上红色(R)或绿色(G)或蓝色(B)的次像素(Sub-pixel)即会呈现红色(R)或绿色(G)或蓝色(B)，最后显示在液晶显示器的面板上。Please refer to FIG. 1 for a schematic cross-sectional view of an existing liquid crystal display. The backlight module 11 includes components such as white LEDs 111 , reflection sheets 112 , light guide plates 113 , diffusion plates, and prism sheets. The white light emitted by the white LEDs 111 can be transmitted upward to the transparent glass substrate 12 through the combination of these components. There are a plurality of thin film transistors (TFT) 121 on the transparent glass substrate 12 , through the control of the TFTs, white light can pass through the liquid crystal layer 13 to reach the color filter (CF) 141 on another transparent glass substrate 14 . When white light passes through the red (R) or green (G) or blue (B) sub-pixel (Sub-pixel) on the color filter, it will appear red (R) or green (G) or blue (B), and finally displayed on the LCD panel.

发光二极管(LED)是一种由半导体材料构成，利用半导体中的电子与空穴结合而发出光子，产生不同频率的光谱的发光元件。顾名思义，白光LED应该是一个能够发出“白光”的LED，但是所谓人眼可见的“白光”通常是由两种波长以上的光色所组成，而单一的发光二极管只能发出很窄的光谱，并没有办法直接发出白光，不过只要适当的组合不同颜色光的LED，即可产生如蓝色光、黄色光混合而成的二波长白光，或红色光、蓝色光、绿色光混合而成的三波长白光。因此，所谓的白光LED是指以LED为光源，经过特定的设计，最终能够产生白光的产品。A light-emitting diode (LED) is a light-emitting element composed of semiconductor materials that uses the combination of electrons and holes in the semiconductor to emit photons and generate spectra of different frequencies. As the name implies, a white light LED should be an LED that can emit "white light", but the so-called "white light" visible to the human eye is usually composed of light colors with more than two wavelengths, and a single light-emitting diode can only emit a narrow spectrum. There is no way to directly emit white light, but as long as LEDs of different colors are properly combined, two-wavelength white light such as blue light and yellow light can be produced, or three-wavelength white light can be produced by mixing red light, blue light, and green light. white light. Therefore, the so-called white light LED refers to a product that uses LED as a light source and can finally produce white light after a specific design.

1996年Nichia发表InGaN/YAG单晶粒白光LED，白光LED正式迈入商用化，相关的应用随着白光LED发光效率的提高而扩大。我国LED产业在全球竞争中扮演举足轻重的角色，对于白光LED发展自然也不愿缺席，不过由于受限于专利箝制及技术相对落后，发展并不顺遂。但目前国内厂商所制造的其他颜色的LED光源，例如蓝光LED、红光LED或绿光LED在亮度、使用寿命、价格上并不亚于国外厂商，且蓝光LED、红光LED或绿光LED在亮度、使用寿命上亦较白光LED佳，价格却较低廉。基于上述原因，液晶显示器若采用非白光LED作为背光源，将可节省制造成本，增加产品的竞争力。In 1996, Nichia released the InGaN/YAG single-grain white LED, and the white LED was officially commercialized, and the related applications expanded with the improvement of the luminous efficiency of the white LED. my country's LED industry plays a pivotal role in the global competition, and naturally it is unwilling to be absent from the development of white light LEDs. However, due to restrictions on patents and relatively backward technology, the development has not been smooth. However, at present, LED light sources of other colors produced by domestic manufacturers, such as blue LEDs, red LEDs, or green LEDs, are not inferior to foreign manufacturers in terms of brightness, service life, and price, and blue LEDs, red LEDs, or green LEDs In terms of brightness and service life, it is also better than white LEDs, but the price is lower. Based on the above reasons, if a non-white LED is used as a backlight source for a liquid crystal display, the manufacturing cost can be saved and the competitiveness of the product can be increased.

发明内容Contents of the invention

鉴于上述的发明背景中，现有使用白光LED背光源在亮度、使用寿命上较蓝光LED等短波长背光源差，但价格却较蓝光LED等短波长背光源高。故本发明提供一种新的液晶显示器装置，将可节省材料成本，增加产品的竞争力。In view of the above-mentioned background of the invention, the existing white LED backlight is inferior to short-wavelength backlights such as blue LEDs in terms of brightness and service life, but the price is higher than short-wavelength backlights such as blue LEDs. Therefore, the present invention provides a new liquid crystal display device, which can save material cost and increase product competitiveness.

本发明的一个目的，在于提供一种液晶显示器装置，其利用蓝光LED等短波长背光源可激发位于透明基板上的荧光粉层，经混光而呈现白光的原理，因此可使用蓝光LED等短波长光源取代白光LED成为背光模块的光源。An object of the present invention is to provide a liquid crystal display device, which can excite the fluorescent powder layer on the transparent substrate by using a short-wavelength backlight such as a blue LED, and present white light through light mixing, so short-wavelength LEDs such as blue light can be used. The wavelength light source replaces the white light LED as the light source of the backlight module.

本发明的另一个目的，在于提供一种液晶显示器装置，其利用蓝光LED等短波长背光源可激发位于透明基板上的荧光粉层，经混光而呈现红光、绿光或蓝光的原理，因此可使用蓝光LED等短波长光源取代白光LED成为背光模块的光源，同时可去除彩色滤光片的需求。Another object of the present invention is to provide a liquid crystal display device, which utilizes a short-wavelength backlight such as a blue LED to excite a phosphor layer on a transparent substrate, and then presents red light, green light or blue light through light mixing. Therefore, short-wavelength light sources such as blue LEDs can be used instead of white LEDs as the light source of the backlight module, and the need for color filters can be eliminated at the same time.

根据以上所述的目的，本发明提供了一种液晶显示器装置，包括：一背光模块，具有一光源，该光源可发射一第一波长光源；一第一基板，具有多个薄膜晶体管，位于该背光模块的上方；一荧光粉层，位于该第一基板的上方；一彩色滤光片，位于该荧光粉层的上方；一第二基板，位于该彩色滤光片的上方；及一液晶层，位在该第一基板和该第二基板之间，其中该第一波长光线将先穿透该荧光粉层再到达该彩色滤光片。According to the purpose described above, the present invention provides a liquid crystal display device, comprising: a backlight module with a light source capable of emitting a light source with a first wavelength; a first substrate with a plurality of thin film transistors positioned on the Above the backlight module; a phosphor layer located above the first substrate; a color filter located above the phosphor layer; a second substrate located above the color filter; and a liquid crystal layer , located between the first substrate and the second substrate, wherein the light of the first wavelength will first pass through the phosphor layer and then reach the color filter.

根据上述构想，其中该第一基板和第二基板为透明基板。According to the above idea, the first substrate and the second substrate are transparent substrates.

根据上述构想，其中该背光模块从下列选出：直下式背光模块及侧面发光式背光模块。According to the above idea, the backlight module is selected from the following: a direct-type backlight module and a side-emitting backlight module.

根据上述构想，其中该光源从下列选出：蓝光、蓝紫光、紫光、UV光及前述的任意组合。According to the above idea, wherein the light source is selected from the following: blue light, blue-violet light, purple light, UV light and any combination thereof.

根据上述构想，其中该光源为发光二极管(LED)光源。According to the above idea, wherein the light source is a light emitting diode (LED) light source.

根据上述构想，其中该彩色滤光片具有多个红色、绿色、蓝色的次像素。According to the above idea, the color filter has a plurality of red, green and blue sub-pixels.

根据上述构想，其中从该第一波长光线可激发该荧光粉层内的荧光微粒，经由混光而呈现白光。According to the above idea, the light of the first wavelength can excite the fluorescent particles in the fluorescent powder layer to present white light through light mixing.

根据上述构想，其中该荧光粉层为红色荧光粉层与绿色荧光粉层的复合层。According to the above idea, the phosphor layer is a composite layer of a red phosphor layer and a green phosphor layer.

根据上述构想，其中该荧光粉层为黄色荧光粉层。According to the above idea, the phosphor layer is a yellow phosphor layer.

根据上述构想，其中该荧光粉层为红色荧光粉与绿色荧光粉均匀混合的单一层。According to the above idea, the phosphor layer is a single layer uniformly mixed with red phosphor and green phosphor.

根据上述构想，其中该彩色滤光片上蓝色次像素所对应的该荧光粉层为蓝色荧光粉层。According to the above idea, the phosphor layer corresponding to the blue sub-pixel on the color filter is a blue phosphor layer.

根据上述构想，其中该彩色滤光片上蓝色次像素所对应的该荧光粉层被去除。According to the above idea, the phosphor layer corresponding to the blue sub-pixel on the color filter is removed.

根据以上所述的目的，本发明提供了一种液晶显示器装置，包括：一背光模块，具有一光源，该光源可发射一第一波长光源；一第一基板，具有多个薄膜晶体管，位于该背光模块的上方；一荧光粉层，具有多个红色、绿色、蓝色次像素的荧光粉区域，位于该第一基板的上方；一第二基板，位于该荧光粉层的上方；及一液晶层，位在该第一基板和该第二基板之间，其中当该第一波长光线穿透该荧光粉层后，在该红色次像素的荧光粉区域呈现红光，于该绿色次像素的荧光粉区域呈现绿光，于该蓝色次像素的荧光粉区域呈现蓝光，其中该荧光粉层中的该蓝次像素的荧光粉区域所对应的该荧光粉层为蓝色荧光粉层或者被去除。According to the purpose described above, the present invention provides a liquid crystal display device, comprising: a backlight module with a light source capable of emitting a light source with a first wavelength; a first substrate with a plurality of thin film transistors located on the The top of the backlight module; a phosphor layer, with a plurality of red, green, blue sub-pixel phosphor areas, located above the first substrate; a second substrate, located above the phosphor layer; and a liquid crystal layer, located between the first substrate and the second substrate, wherein when the light of the first wavelength passes through the phosphor layer, red light appears in the phosphor area of the red sub-pixel, and red light appears in the phosphor area of the green sub-pixel The phosphor area presents green light, and the phosphor area of the blue sub-pixel presents blue light, wherein the phosphor layer corresponding to the phosphor area of the blue sub-pixel in the phosphor layer is a blue phosphor layer or is covered by remove.

根据上述构想，其中该第一基板和第二基板为透明基板。According to the above idea, the first substrate and the second substrate are transparent substrates.

根据上述构想，其中该背光模块从下列选出：直下式背光模块及侧面发光式背光模块。According to the above idea, the backlight module is selected from the following: a direct-type backlight module and a side-emitting backlight module.

根据上述构想，其中该光源从下列选出：蓝光、蓝紫光、紫光及UV光。According to the above idea, wherein the light source is selected from the following: blue light, blue-violet light, purple light and UV light.

根据上述构想，其中该光源为发光二极管(LED)光源。According to the above idea, wherein the light source is a light emitting diode (LED) light source.

根据上述构想，其中该荧光粉层中的该蓝色次像素的荧光粉区域所对应的该荧光粉层为蓝色荧光粉层。According to the above idea, the phosphor layer corresponding to the phosphor region of the blue sub-pixel in the phosphor layer is a blue phosphor layer.

根据上述构想，其中该荧光粉层中的该蓝色次像素的荧光粉区域所对应的该荧光粉层被去除。According to the above idea, the phosphor layer corresponding to the phosphor region of the blue sub-pixel in the phosphor layer is removed.

附图说明Description of drawings

图1显示的是现有的液晶显示器剖面示意图；Figure 1 shows a schematic cross-sectional view of an existing liquid crystal display;

图2显示的是本发明第一实施例的液晶显示器剖面示意图；What Fig. 2 shows is the schematic sectional view of the liquid crystal display of the first embodiment of the present invention;

图3显示的是本发明第二实施例的液晶显示器剖面示意图；及Figure 3 shows a schematic cross-sectional view of a liquid crystal display according to a second embodiment of the present invention; and

图4显示的是一种直下式背光源模极的剖面示意图。FIG. 4 shows a schematic cross-sectional view of a direct-lit backlight die.

附图标记说明Explanation of reference signs

11、21、31         背光模块         111                白光LED11, 21, 31 Backlight module 111 White LED

112、212、312、412 反射片           113、213、313、413 导光板112, 212, 312, 412Reflector 113, 213, 313, 413 Light guide plate

12、22、32         透明玻璃基板     121、221、321      薄膜晶体管12, 22, 32Transparent glass substrate 121, 221, 321 Thin film transistor

14、24、34         另一透明玻璃基板 13、23、33         液晶层14, 24, 34 Anothertransparent glass substrate 13, 23, 33 Liquid crystal layer

141                彩色滤光片       211、311           蓝光LED141Color filter 211, 311 Blue LED

241、341           荧光粉层         242                彩色滤光片241, 341Phosphor layer 242 Color filter

2411               红色荧光粉层或绿色荧光粉层2411 Red phosphor layer or green phosphor layer

2412               绿色荧光粉层或红色荧光粉层2412 Green phosphor layer or red phosphor layer

3411               红色次像素所在区域3411 The area where the red sub-pixel is located

3412               绿色次像素所在区域3412 The area where the green sub-pixel is located

3413               蓝色次像素所在区域3413 Area where the blue sub-pixel is located

41                 直下式背光源模组41 Direct type backlight module

411                光源411 Light source

具体实施方式Detailed ways

本发明的一些实施例会详细描述如下。然而，除了详细描述外，本发明还可以广泛地在其他的实施例施行，且本发明的范围不受限定，其以所附的权利要求为准。Some embodiments of the present invention are described in detail as follows. However, the invention may also be practiced broadly in other embodiments than those described in detail, and the scope of the invention should not be limited except by the appended claims.

本发明的第一实施例请见图2液晶显示器的剖面示意图。背光模块21包含了蓝光LED211、反射片212、导光板213及扩散板、棱镜片等构件，蓝光LED211所发射的蓝光可经由此些构件的组合而向上传到透明玻璃基板22。透明玻璃基板22上有多个薄膜晶体管(TFT)221，经由薄膜晶体管的控制，蓝光即可穿过液晶层23到达另一透明玻璃基板24上的荧光粉层241。荧光粉层241为两层荧光粉层2411、2412所组合而成。荧光粉层2411为红色荧光粉层，而荧光粉层2412为绿色荧光粉层，或者荧光粉层2411为绿色荧光粉层，而荧光粉层2412为红色荧光粉层均可。蓝光穿透荧光粉层241，将因蓝光为短波长的光，故可激发荧光粉层241内的荧光微粒，经混光而发出白光。当白光经过彩色滤光片(CF)242时，即会随彩色滤光片(CF)242上的次像素(Sbu-pixel)为红色(R)或绿色(G)或蓝色(B)而呈现红色(R)或绿色(G)或蓝色(B)，最后显示在液晶显示器的面板上。Please refer to the schematic cross-sectional view of the liquid crystal display in FIG. 2 for the first embodiment of the present invention. Thebacklight module 21 includes components such asblue LED 211 ,reflection sheet 212 ,light guide plate 213 , diffuser plate, and prism sheet. There are a plurality of thin film transistors (TFT) 221 on thetransparent glass substrate 22 , through the control of the TFTs, the blue light can pass through theliquid crystal layer 23 to reach thephosphor layer 241 on anothertransparent glass substrate 24 . Thephosphor layer 241 is composed of twophosphor layers 2411 and 2412 . Thephosphor layer 2411 is a red phosphor layer, and thephosphor layer 2412 is a green phosphor layer, or thephosphor layer 2411 is a green phosphor layer, and thephosphor layer 2412 is a red phosphor layer. The blue light penetrates thephosphor layer 241 , and because the blue light has a short wavelength, it can excite the fluorescent particles in thephosphor layer 241 to emit white light through light mixing. When the white light passes through the color filter (CF) 242, the sub-pixel (Sbu-pixel) on the color filter (CF) 242 is red (R) or green (G) or blue (B). Present red (R) or green (G) or blue (B), and finally displayed on the panel of the liquid crystal display.

蓝光LED亦可改为蓝紫光LED、紫光LED或UV-LED等的短波长LED。彩色滤光片242上蓝色次像素所对应的荧光粉层241亦可改为蓝色荧光粉层，如此蓝光穿过荧光粉层241可发出蓝色光，再经过蓝色次像素的彩色滤光片显示在液晶显示器面板上的颜色仍为蓝色。彩色滤光片242上蓝色次像素亦可无荧光粉层241，即蓝光直接经蓝色次像素的彩色滤光片显示在液晶显示器面板上，其显示的颜色仍为蓝色。荧光粉层241亦可为红色荧光粉与绿色荧光粉均匀混合的单一荧光粉层或是单一黄色荧光粉层所构成。Blue LEDs can also be changed to short-wavelength LEDs such as blue-violet LEDs, purple LEDs, or UV-LEDs. Thephosphor layer 241 corresponding to the blue sub-pixel on thecolor filter 242 can also be changed to a blue phosphor layer, so that the blue light passes through thephosphor layer 241 to emit blue light, and then passes through the color filter of the blue sub-pixel The color of the tablet display on the LCD panel remains blue. The blue sub-pixel on thecolor filter 242 may also have nophosphor layer 241, that is, the blue light is directly displayed on the LCD panel through the color filter of the blue sub-pixel, and the displayed color is still blue. Thephosphor layer 241 can also be composed of a single phosphor layer uniformly mixed with red phosphor and green phosphor or a single yellow phosphor layer.

本发明的第二实施例请见图3液晶显示器的剖面示意图。背光模块31包含了蓝光LED311、反射片312、导光板313及扩散板、棱镜片等构件，蓝光LED311所发射的蓝光可经由此些构件的组合而向上传到透明玻璃基板32。透明玻璃基板32上有多个薄膜晶体管(TFT)321，经由薄膜晶体管的控制，蓝光即可穿过液晶层33到达另一透明玻璃基板34上的荧光粉层341。当蓝光穿过红色次像素所在区域的荧光粉层3411时，将因蓝光为短波长的光，故可激发荧光粉层3411内的荧光微粒，经混光而发出红光。同理，当蓝光穿过绿色次像素所在区域的荧光粉层3412时，将因蓝光为短波长的光，故可激发荧光粉层3412内的荧光微粒，经混光而发出绿光。当蓝光穿过蓝色次像素所在区域的荧光粉层3413时，将因蓝光为短波长的光，故可激发荧光粉层3413内的荧光微粒，经混光而发出蓝光。这些经荧光粉层341的光最后显示在液晶显示器的面板上呈现红色(R)或绿色(G)或蓝色(B)。For a second embodiment of the present invention, please refer to FIG. 3 , a schematic cross-sectional view of a liquid crystal display. The backlight module 31 includes components such as blue LED 311 , reflection sheet 312 , light guide plate 313 , diffuser plate, and prism sheet. There are multiple thin film transistors (TFT) 321 on the transparent glass substrate 32 , through the control of the TFTs, the blue light can pass through the liquid crystal layer 33 to reach the phosphor layer 341 on another transparent glass substrate 34 . When the blue light passes through the phosphor layer 3411 where the red sub-pixel is located, the blue light is short-wavelength light, so it can excite the phosphor particles in the phosphor layer 3411 to emit red light through light mixing. Similarly, when the blue light passes through the phosphor layer 3412 where the green sub-pixel is located, the blue light is short-wavelength light, so it can excite the fluorescent particles in the phosphor layer 3412 to emit green light through light mixing. When the blue light passes through the phosphor layer 3413 where the blue sub-pixel is located, the blue light is short-wavelength light, so it can excite the fluorescent particles in the phosphor layer 3413 to emit blue light through light mixing. The light passing through the phosphor layer 341 is finally displayed on the panel of the liquid crystal display as red (R) or green (G) or blue (B).

蓝光LED亦可改为蓝紫光LED、紫光LED或UV-LED等的短波长LED。蓝色次像素所在区域亦可无荧光粉层3413，即蓝光直接显示在液晶显示器面板上，其显示的颜色仍为蓝色。Blue LEDs can also be changed to short-wavelength LEDs such as blue-violet LEDs, purple LEDs, or UV-LEDs. The area where the blue sub-pixel is located may also have no phosphor layer 3413, that is, the blue light is directly displayed on the liquid crystal display panel, and the displayed color is still blue.

要注意的是，上述实施例中的侧面发光式背光源模组亦可使用直下式背光源模组取代，如图4所示。直下式背光模块41包含了光源411、反射片412、导光板413及扩散板、棱镜片等构件，同样的，从光源411所发射的光可经由此些构件的组合而向上传到透明玻璃基板，因后续过程与上述实施例相同，所以不再重复说明。It should be noted that the side-emitting backlight module in the above embodiments can also be replaced by a direct-lit backlight module, as shown in FIG. 4 . The direct-litbacklight module 41 includes components such as alight source 411, areflection sheet 412, alight guide plate 413, a diffuser plate, and a prism sheet. Similarly, the light emitted from thelight source 411 can be transmitted upward to the transparent glass substrate through the combination of these components. , because the subsequent process is the same as the above embodiment, so the description will not be repeated.

即使本发明藉由举出数个优选实施例来描述，但是本发明并不限定于所举出的实施例。先前虽举出与叙述的特定实施例，但是显而易见地，其它未脱离本发明所揭示的精神下，所完成的等效改变或修饰，均应包含在本发明的权利要求内。此外，凡其它未脱离本发明所揭示的精神下，所完成的其他类似与近似改变或修饰，也均包含在本发明的权利要求内。同时应以最广的定义来解释本发明的范围，藉以包含所有的修饰与类似结构。Even though the invention has been described by citing several preferred embodiments, the invention is not limited to the exemplified examples. Although specific embodiments have been exemplified and described above, it is obvious that other equivalent changes or modifications made without departing from the disclosed spirit of the present invention shall be included in the claims of the present invention. In addition, all other similar and similar changes or modifications made without departing from the spirit disclosed in the present invention are also included in the claims of the present invention. At the same time, the scope of the present invention should be interpreted in the broadest definition so as to include all modifications and similar structures.

Claims (17)

1. LCD device comprises:

One backlight module has a light source, and this light source can be launched one first wavelength light;

One first substrate has a plurality of thin film transistor (TFT)s, is positioned at the top of this backlight module;

One phosphor powder layer is positioned at the top of this first substrate;

One colored filter is positioned at the top of this phosphor powder layer;

One second substrate is positioned at the top of this colored filter; And

One liquid crystal layer, between this first substrate and second substrate, wherein this first wavelength light arrives penetrate this phosphor powder layer earlier in this colored filter again.

2. LCD device as claimed in claim 1, wherein this first substrate and second substrate are transparency carrier.

3. LCD device as claimed in claim 1, wherein this backlight module is selected from following: direct type backlight module and lateral emitting formula backlight module.

4. LCD device as claimed in claim 1, wherein this light source is selected from following: blue light, royal purple light, purple light, UV light and aforesaid combination in any.

5. LCD device as claimed in claim 1, wherein this light source is a LED source.

6. LCD device as claimed in claim 1, wherein this colored filter has the inferior pixel of a plurality of redness, green, blueness.

7. LCD device as claimed in claim 1 wherein can excite fluorescent particle in this phosphor powder layer from this first wavelength light, presents white light via mixed light.

8. LCD device as claimed in claim 1, wherein this phosphor powder layer is the composite bed of red fluorescence bisque and green phosphor layer.

9. LCD device as claimed in claim 1, wherein this phosphor powder layer is the yellow fluorescence bisque.

10. LCD device as claimed in claim 1, wherein this phosphor powder layer is red fluorescence powder and the mixed uniformly simple layer of green emitting phosphor.

11. LCD device as claimed in claim 6, wherein this colored filter blue time pairing this phosphor powder layer of pixel is a blue phosphor layer.

12. LCD device as claimed in claim 6, wherein this colored filter blue time pairing this phosphor powder layer of pixel is removed.

13. a LCD device comprises:

One backlight module has a light source, and this light source can be launched one first wavelength light;

One first substrate has a plurality of thin film transistor (TFT)s, is positioned at the top of this backlight module;

One phosphor powder layer has the phosphor area of a plurality of red, green, blues time pixel, is positioned at the top of this first substrate;

One second substrate is positioned at the top of this phosphor powder layer; And

One liquid crystal layer is between this first substrate and second substrate, wherein behind this this phosphor powder layer of first wavelength light penetration, phosphor area in this red pixel presents ruddiness, phosphor area in this green pixel presents green glow, presents blue light in the phosphor area of this indigo plant time pixel

Wherein pairing this phosphor powder layer of phosphor area of time pixel of this indigo plant in this phosphor powder layer is blue phosphor layer or is removed.

14. LCD device as claimed in claim 13, wherein this first substrate and second substrate are transparency carrier.

15. LCD device as claimed in claim 13, wherein this backlight module is selected from following: direct type backlight module and lateral emitting formula backlight module.

16. LCD device as claimed in claim 13, wherein this light source is selected from following: blue light, royal purple light, purple light and UV light.

17. LCD device as claimed in claim 13, wherein this light source is a LED source.

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