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WO2015144068A1 - 液晶显示装置 - Google Patents

液晶显示装置 Download PDF

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Publication number
WO2015144068A1
WO2015144068A1 PCT/CN2015/075121 CN2015075121W WO2015144068A1 WO 2015144068 A1 WO2015144068 A1 WO 2015144068A1 CN 2015075121 W CN2015075121 W CN 2015075121W WO 2015144068 A1 WO2015144068 A1 WO 2015144068A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid crystal
light
blue
display device
crystal display
Prior art date
Application number
PCT/CN2015/075121
Other languages
English (en)
French (fr)
Inventor
樊勇
常建宇
Original Assignee
深圳市华星光电技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US14/777,233 priority Critical patent/US20170004782A1/en
Publication of WO2015144068A1 publication Critical patent/WO2015144068A1/zh

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    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
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    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
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    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
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    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
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    • 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
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Definitions

  • the present invention relates to the field of liquid crystal display, and more particularly to a color liquid crystal display device having a two-color sequential backlight.
  • a color filter In a conventional liquid crystal display device, a color filter (CF) has a large loss of light, and about 2/3 of the light is wasted by the color filter.
  • FSC field sequential color
  • the field color sequence method is specifically: using the time series to display three sub-images of red, green and blue, and the full-color image is presented on the retina by time-mixing through the persistence of human vision.
  • the three sub-images of red, green and blue cannot overlap completely on the retina, and there is a phenomenon of color misalignment at the edge, and color breakup occurs through the persistence of vision.
  • the field color-sequence technique requires a higher frequency of the screen, for example, the original full-color image frequency is 60 Hz, and the field color-sequence technique requires at least 180 Hz.
  • the response speed of liquid crystal molecules is currently not up to standard.
  • the liquid crystal display device includes a backlight module, a liquid crystal panel, a color filter, and a controller.
  • the backlight module includes a light guide plate, a plurality of white LEDs emitting white light, and a plurality of blue LEDs corresponding to the plurality of white LEDs and emitting blue light.
  • the light guide plate includes a light incident surface and a light exit surface.
  • the plurality of white LEDs and the plurality of blue LEDs each face the light incident surface.
  • Each of the white LEDs includes a blue light chip for emitting blue light and a phosphor excited by the blue light, and each of the blue light LEDs includes a blue light chip.
  • the liquid crystal panel is opposite to the light emitting surface for receiving light from the backlight module.
  • the color filter is opposite to the liquid crystal panel and is configured to receive light passing through the liquid crystal panel.
  • the color filter includes a red color resistance for red light passing through, a green color resistance for green light to pass through, and a transparent color resistance for light of any color to pass through.
  • the controller is configured to control each white LED and the corresponding blue LED to be turned on according to an input signal, and control the liquid crystal surface A light valve in the plate to form an image.
  • the controller turns on only the plurality of white LEDs in a first time, and turns on only the blue LEDs corresponding to the plurality of white LEDs in a second time after the first time.
  • the light emitted by each of the white LEDs and the corresponding blue LEDs sequentially passes through the light guide plate, the liquid crystal panel and the color filter to form a first frame image and a second frame image, and the first frame image and the second image
  • the frame images are superimposed to form a full color image.
  • the liquid crystal display device further includes a first polarizer, and the first polarizer is located between the liquid crystal panel and the backlight module.
  • the liquid crystal display device further includes a second polarizer, the second polarizer is opposite to the color filter, and the second polarizer and the liquid crystal panel are respectively located on opposite sides of the color filter.
  • the liquid crystal panel includes a thin film transistor array substrate, a liquid crystal layer and an alignment layer.
  • the thin film transistor array substrate, the liquid crystal layer and the alignment layer are sequentially arranged from the backlight module to the color filter.
  • the backlight module is a side-in structure.
  • the backlight module further includes a circuit board, the light guide plate includes a light incident surface, the circuit board is opposite to the light incident surface, and the plurality of white light LEDs and the plurality of blue light LEDs are alternately arranged at intervals On the board.
  • the plurality of white LEDs and the plurality of blue LEDs are arranged in a straight line.
  • the backlight module further includes a first circuit board and a second circuit board, the light guide board includes two opposite first light incident surfaces and a second light incident surface, the first circuit board and the second circuit board Separately disposed on opposite sides of the light guide plate and opposite to the first light incident surface and the second light incident surface, the plurality of blue LEDs are disposed on the first circuit board at intervals from each other, and the plurality of white LEDs are mutually connected to each other. They are disposed at intervals on the second circuit board.
  • the plurality of blue LEDs are arranged in a straight line
  • the plurality of white LEDs are arranged in a straight line.
  • the backlight module has a direct structure.
  • the backlight module further includes a circuit board, the light guide plate includes a light incident surface, the circuit board is opposite to the light incident surface, and a white LED and the corresponding blue LED together form an LED light group, and the plurality of LEDs emit light.
  • the groups are arranged in a matrix on the circuit board and opposite to the light incident surface.
  • each white LED further comprises a glass cover covering the blue chip, and the phosphor is coated on the inner surface of the glass cover.
  • each blue LED further comprises a glass cover that covers the blue chip.
  • the phosphor is selected from the group consisting of yellow powder, RG phosphor powder and Y+R phosphor powder.
  • the material of the phosphor is selected from the group consisting of Y 3 Al 5 O 12 :Ce 3+ , Tb 3 Al 5 O 12 :Ce 3+ , nitride, and silicate.
  • the light guide plate has a flat plate structure.
  • the light guide plate has a wedge structure.
  • the first frame image generated by the liquid crystal display device provided by the invention has red, green and white picture information
  • the second frame image only has blue picture information, and the color cracking phenomenon is greatly reduced.
  • the liquid crystal display device needs to display a full-color image, and only needs to brush the screen when forming the first frame image and the second frame image, and the screen frequency only needs 120HZ, and the frequency is consistent with the response speed of the liquid crystal molecules.
  • FIG. 1 is a schematic plan view of a liquid crystal display device according to a first embodiment of the present invention.
  • FIG. 2 is a schematic plan view of a backlight module of the liquid crystal display device of FIG. 1.
  • FIG. 3 is a schematic view showing a full color image of the liquid crystal display device of FIG. 1.
  • FIG. 4 is a schematic plan view of a backlight module in a liquid crystal display device according to a second embodiment of the present invention.
  • FIG. 5 is a schematic plan view of a backlight module in a liquid crystal display device according to a third embodiment of the present invention.
  • FIG. 6 is a schematic plan view of the backlight module of FIG. 5 with the light guide plate removed.
  • a liquid crystal display device 100 includes a backlight module 10 , a first polarizer 20 , a liquid crystal panel 30 , a color filter 40 , and a second polarized light .
  • Sheet 50 and a controller 60.
  • the backlight module 10 is a side-in type structure, and includes a light guide plate 12 , a circuit board 14 , and a plurality of white light emitting diodes (WLEDs) (hereinafter referred to as white LEDs). 16 and a plurality of blue light emitting diodes (BLEDs) (hereinafter referred to as blue LEDs) 18.
  • the plurality of white LEDs 16 are in one-to-one correspondence with the plurality of blue LEDs 18. For convenience of description, in the present embodiment, only the two white LEDs and two blue LEDs are illustrated.
  • the light guide plate 12 can be a flat plate structure or a wedge structure, and includes a light incident surface 122 and a light exit surface 124.
  • the light-emitting surface 124 is perpendicular to the light-incident surface 122.
  • the circuit board 14 includes a first surface 142 and a second surface 144.
  • the first surface 142 and the second surface 144 are respectively located on opposite sides of the circuit board 14 , and the first surface 142 is parallel to the second surface 144 .
  • the second surface 144 is opposite to the light incident surface 122 and parallel to each other.
  • the plurality of white LEDs 16 and the plurality of blue LEDs 18 are alternately disposed on the second surface 144 of the circuit board 14 so as to be spaced apart from each other to be aligned in a line to face the light incident surface 122.
  • Each of the white LEDs 16 includes a blue chip 162, a glass cover 164 that covers the blue chip 162, and a phosphor 166 coated on the inner surface of the glass cover 164.
  • the blue chip 162 is used to emit blue light.
  • the blue light excites the phosphor 166 to form white light and is emitted from the glass cover 164.
  • the phosphor 166 is selected from any one of yellow powder, RG phosphor, and Y+R phosphor.
  • the material of the phosphor 166 is selected from any one of Y 3 Al 5 O 12 :Ce 3+ (YAG), Tb 3 Al 5 O 12 :Ce 3+ (TAG), nitride and silicate.
  • Each of the blue LEDs 18 includes a blue chip 182 and a glass cover 184 that covers the blue chip 182. The blue light emitted by the blue chip 182 is emitted from the glass cover 184.
  • the first polarizer 20, the liquid crystal panel 30, the color filter 40, and the second polarizer 50 are sequentially arranged above the light-emitting surface 124 and both face the light-emitting surface 124.
  • the liquid crystal panel 30 includes a thin film transistor array substrate 32, a liquid crystal layer 34, and an alignment layer 36.
  • the thin film transistor array substrate 32, the liquid crystal layer 34, and the alignment layer 36 are sequentially arranged in the direction from the backlight module 10 to the color filter 40.
  • the color filter 40 is opposed to the liquid crystal panel 30.
  • the color filter 40 includes a red color resist R for red light passing through, a green color resist G for green light to pass through, and a transparent color resist T for light of any color to pass.
  • the controller 60 is electrically connected to the liquid crystal panel 30 and the backlight module 10 .
  • the controller 60 is configured to control each white LED 16 and the corresponding blue LED 18 in the backlight module 10 to be turned on according to an input signal, and control a light valve in the liquid crystal panel 30 to form an image.
  • the controller 60 turns on only a plurality of white LEDs 16 in a first time, and the blue chip 162 in each white LED 16 emits blue light, and the blue light excites the phosphor 166 to form
  • the white light is emitted from the glass cover 164, and the white light emitted from the glass cover 164 enters the light guide plate 12 from the light incident surface 122 and is reflected from the light exit surface 124 after being reflected multiple times from the light exit surface 124.
  • the light exit surface 124 is emitted from the light exit surface 124.
  • the emitted white light sequentially passes through the first polarizer 20, the liquid crystal panel 30, the color filter 40, and the second polarizer 50 to form a first frame image (a). Since the red color resistance R of the color filter 40 is only for red light, the green color resistance G is only for green light, and the transparent color resistance T is for light of any color, the first frame image (a) has a red R
  • the controller 60 turns on only the blue LEDs 18 corresponding to the plurality of white LEDs 16 in a second time after the first time, and the blue chip 182 in each of the blue LEDs 18 emits blue light and is emitted from the glass cover 184.
  • the blue light emitted from the glass cover 184 enters the light guide plate 12 from the light incident surface 122 and is reflected from the light exit surface 124 after being reflected multiple times in the interior thereof.
  • the blue light emitted from the light exit surface 124 sequentially passes through the first polarizer. 20.
  • the liquid crystal panel 30, the color filter 40, and the second polarizer 50 form a second frame image (b).
  • the second frame image (b) has only blue
  • the first frame image (a) and the second frame image (b) are superimposed to form a full color image for viewing by a user.
  • the blue light emitted by the blue chip 162 of the white LED 16 and the blue light emitted by the blue chip 182 of the blue LED 18 have the same dominant wavelength band, and the peak wavelength is between 440 and 470 nm, and the difference between the dominant wavelengths of the two blue light is within 5 nm. .
  • the first frame image (a) generated by the liquid crystal display device 100 in this embodiment has picture information of red R, green G, and white W
  • the second frame image (b) has only picture information of blue B
  • the color The cracking phenomenon has been greatly reduced.
  • the liquid crystal display device 100 is required to display a full-color image, and only needs to be swiped when forming the first frame image (a) and the second frame image (b), and the screen frequency only needs 120 Hz, and the frequency is consistent with the liquid crystal molecules. responding speed.
  • both the white LED 16 and the blue LED 18 are illuminated by the blue chip, the lifetime attenuation curves of the white LED 16 and the blue LED 18 are identical, and the color drift of the backlight module 10 due to long-term use is greatly reduced.
  • the energy efficiency of the white LED 16 is greater than the energy efficiency of the current red and green single chip, the driving power consumption of the backlight module 10 can be reduced.
  • the structure of the liquid crystal display device provided by the second embodiment of the present invention is substantially the same as that of the liquid crystal display device 100 of the first embodiment, except that the backlight module 70 and the first embodiment in this embodiment are the same.
  • the backlight module 10 in the embodiment is different.
  • the backlight module 70 is a side-in type structure, and includes a light guide plate 72, a first circuit board 73, a second circuit board 74, a plurality of white light-emitting white LEDs 76, and a plurality of blue-emitting blue LEDs 78.
  • the plurality of white LEDs 76 are in one-to-one correspondence with the plurality of blue LEDs 78.
  • the light guide plate 72 can be a flat plate structure or a wedge structure, and includes a first light incident surface 722, a second light incident surface 723, and a light exit surface 724.
  • the first light incident surface 722 and the second light incident surface 723 are respectively located on opposite sides of the light guide plate 22 , and the first light incident surface 722 is parallel to the second light incident surface 723 .
  • the light-emitting surface 724 is perpendicularly connected to the first light-incident surface 722 and the second light-incident surface 723.
  • the first circuit board 73 and the second circuit board 74 are respectively located on opposite sides of the light guide plate 72 and are opposite to the first light incident surface 722 and the second light incident surface 723, respectively.
  • the specific structure of the first circuit board 73 and the second circuit board 74 is identical to the specific structure of the circuit board 14 in the first embodiment.
  • the plurality of blue LEDs 78 are disposed on the first circuit board 73 at a distance from each other and arranged in a line to face the first light incident surface 722.
  • the plurality of white light LEDs 76 are spaced apart from each other on the second circuit board 74. And arranged in a straight line to face the second light incident surface 723.
  • the liquid crystal display device of the present embodiment has the same advantageous effects as the liquid crystal display device 100 of the first embodiment, and the working principle of the liquid crystal display device of the present embodiment is the same as that of the first embodiment.
  • the working principle of the liquid crystal display device 100 is completely the same, and will not be described herein any further.
  • the structure of the liquid crystal display device provided by the third embodiment of the present invention is basically the same as that of the liquid crystal display device 100 of the first embodiment, except that the backlight module in this embodiment is the same.
  • the group 80 is different from the backlight module 10 in the first embodiment.
  • the backlight module 80 is a direct-type structure, and includes a light guide plate 82, a circuit board 84, a plurality of white light-emitting white LEDs 86, and a plurality of blue-emitting blue LEDs 88.
  • the plurality of white LEDs 86 are in one-to-one correspondence with the plurality of blue LEDs 88.
  • the light guide plate 82 can be a flat plate structure or a wedge structure, and includes a light incident surface 822 and a light exit surface 824.
  • the light incident surface 822 and the light exit surface 824 are respectively located on opposite sides of the light guide plate 82.
  • the circuit board 84 is located below the light guide plate 82 and opposite to the light incident surface 822.
  • the board 84 The specific structure is exactly the same as that of the circuit board 14 in the first embodiment.
  • a white LED 86 and a corresponding blue LED 88 together form an LED illumination group 89, and a plurality of LED illumination groups 89 are arranged in a matrix on the circuit board 84 and opposite the light entrance surface 822.
  • Each of the plurality of LED lighting groups 89 and the corresponding blue LEDs 88 are still activated in time sequence as in the first embodiment, except that the emitted light enters the light guide plate 82 from the light incident surface 822.
  • the liquid crystal display device of the present embodiment has the same advantageous effects as the liquid crystal display device 100 of the first embodiment, and the working principle of the liquid crystal display device of the present embodiment is the same as that of the first embodiment.
  • the working principle of the liquid crystal display device 100 is completely the same, and will not be described herein any further.

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Abstract

一种液晶显示装置，包括背光模组（10）、液晶面板（30）、彩色滤光片（40）及控制器（60）。背光模组（10）包括具有入光面（122）及出光面（124）的导光板（12）、多个白光LED（16）及多个蓝光LED（18）。白光LED（16）及蓝光LED（18）均与入光面（122）面对。白光LED（16）包括用于发蓝光的蓝光芯片（162）及被蓝光激发的荧光粉（166），蓝光LED（18）包括蓝光芯片（182）。液晶面板（30）与出光面（124）相对。彩色滤光片（40）与液晶面板（30）相对。彩色滤光片（40）包括仅供红色光线通过的红色色阻（R）、仅供绿色光线通过的绿色色阻（G）及供任何颜色的光线通过的透明色阻（T）。控制器（60）用于根据输入信号控制每个白光LED（16）及对应的蓝光LED（18）依时序开启并均经过导光板（12）、液晶面板（30）及彩色滤光片（40）后形成第一帧图像（a）及第二帧图像（b），及控制液晶面板（30）中的光阀以形成图像。第一帧图像（a）及第二帧图像（b）叠加形成全彩图像。

Description

液晶显示装置 技术领域
本发明涉及液晶显示领域，尤其涉及一种具有双色顺序背光的彩色液晶显示装置。
背景技术
在传统的液晶显示装置中，彩色滤光片(Color Filter，CF)对光的损耗非常大，大约有2/3的光被彩色滤光片浪费掉。为了更好的利用背光的光源，减少光损失，一种无需彩色滤光片的采用场色序法(Field Sequential Color，FSC)技术的液晶显示装置应运而生。场色序法技术具体为：利用时序显示红、绿、蓝三个子图像，通过人眼视觉暂留，在视网膜上透过时间混色的方法呈现全彩图像。然而，由于人眼与图像之间有一个相对速度，红、绿、蓝三个子图像在视网膜上无法完全重叠，在边缘会有颜色错位的现象，而经视觉暂留产生色裂(Color Breakup，CBU)现象，此现象将严重影响液晶显示装置的显示图像品质。而且，场色序法技术所要求的刷屏频率较高，例如原本一幅全彩图像频率为60HZ，使用场色序法技术则至少需要180HZ。然而，目前液晶分子的响应速度还达不到要求。
因此，有必要提供能够解决上述问题的液晶显示装置。
发明内容
为了解决上述技术问题，本发明实施例提供了一种液晶显示装置。该液晶显示装置包括背光模组、液晶面板、彩色滤光片及控制器。该背光模组包括导光板、多个发白光的白光LED及与该多个白光LED对应并发蓝光的多个蓝光LED。该导光板包括入光面及出光面。该多个白光LED及该多个蓝光LED均与该入光面面对。每个白光LED包括用于发蓝光的蓝光芯片及被该蓝光激发的荧光粉，每个蓝光LED包括蓝光芯片。该液晶面板与该出光面相对以用于接收来自该背光模组的光线。该彩色滤光片与该液晶面板相对并用于接收穿过该液晶面板的光线。该彩色滤光片包括一仅供红色光线通过的红色色阻、一仅供绿色光线通过的绿色色阻及一供任何颜色的光线通过的透明色阻。该控制器用于根据输入信号控制每个白光LED及对应的蓝光LED依时序开启，及控制该液晶面 板中的光阀以形成图像。该控制器在第一时间内仅使该多个白色LED开启，及在该第一时间之后的第二时间内仅使与该多个白色LED对应的蓝色LED开启。每个白光LED及对应的蓝光LED发出的光线依序均经过该导光板、该液晶面板及该彩色滤光片后形成第一帧图像及第二帧图像，该第一帧图像及该第二帧图像叠加形成全彩图像。
其中，该液晶显示装置还包括第一偏光片，该第一偏光片位于该液晶面板与该背光模组之间。
其中，该液晶显示装置还包括第二偏光片，该第二偏光片与该彩色滤光片相对，且该第二偏光片与该液晶面板分别位于该彩色滤光片的相背两侧。
其中，该液晶面板包括薄膜晶体管阵列基板、液晶层及定向层，自该背光模组到该彩色滤光片的方向上，该薄膜晶体管阵列基板、该液晶层及该定向层依次排列。
其中，该背光模组为侧入式结构。
其中，该背光模组进一步包括一个电路板，该导光板包括一个入光面，该电路板与该入光面相对，该多个白光LED及该多个蓝光LED相互交替且彼此间隔地设置在该电路板上。
其中，该多个白光LED及该多个蓝光LED排列成一条直线。
其中，该背光模组进一步包括第一电路板及第二电路板，该导光板包括两个相背的第一入光面及第二入光面，该第一电路板及该第二电路板分别位于该导光板相背两侧且分别与该第一入光面及该第二入光面相对，该多个蓝光LED彼此间隔地设置在该第一电路板上，该多个白光LED彼此间隔地设置在该第二电路板上。
其中，该多个蓝光LED排列成一条直线，该多个白光LED排列成一条直线。
其中，该背光模组为直下式结构。
其中，该背光模组进一步包括一个电路板，该导光板包括一个入光面，该电路板与该入光面相对，一个白光LED与对应的蓝光LED共同组成一个LED发光组，多个LED发光组呈矩阵式排列在该电路板上并与该入光面相对。
其中，每个白光LED进一步包括玻璃罩，该玻璃罩罩住该蓝光芯片，该荧光粉涂覆在该玻璃罩的内表面。
其中，每个蓝光LED进一步包括玻璃罩，该玻璃罩罩住该蓝光芯片。
其中，该荧光粉选自黄粉、RG荧光粉及Y+R荧光粉中任意一种。
其中，该荧光粉的材料选自Y3Al5O12：Ce3+，Tb3Al5O12：Ce3+，氮化物，硅酸盐中任意一种。
其中，该导光板为平板形结构。
其中，该导光板为楔形结构。
本发明所提供的液晶显示装置所产生的第一帧图像具有红色、绿色及白色的画面信息，第二帧图像仅具有蓝色的画面信息，则色裂现象得到了大大的减轻。而且本液晶显示装置要显示一幅全彩图像，只需要在形成第一帧图像及第二帧图像时刷屏，刷屏频率只需要120HZ，该频率符合液晶分子的响应速度。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1是本发明第一实施例提供的液晶显示装置的平面示意图。
图2是图1中液晶显示装置的背光模组的平面示意图。
图3是图1中液晶显示装置显示全彩图像的示意图。
图4是本发明第二实施例提供的液晶显示装置中背光模组的平面示意图。
图5是本发明第三实施例提供的液晶显示装置中背光模组的平面示意图。
图6是图5中背光模组除去导光板后的平面示意图。
具体实施例
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
实施例一
请参阅图1，本发明第一实施例提供的液晶显示装置100包括一个背光模组10、一个第一偏光片20、一个液晶面板30、一个彩色滤光片40、一个第二偏光 片50以及一个控制器60。
请参阅图2，该背光模组10为侧入式结构，其包括一个导光板12、一个电路板14、多个发白光的白光发光二极管(white light emitting diode，WLED)(下称白光LED)16以及多个发蓝光的蓝光发光二极管(white light emitting diode，BLED)(下称蓝光LED)18。该多个白光LED16与该多个蓝光LED18一一对应。为了方便说明，本实施例中仅以该两个白光LED及两个蓝光LED来说明。
该导光板12可为平板形结构或者楔形结构，其包括一个入光面122及一个出光面124。该出光面124与该入光面122垂直相接。
该电路板14包括一个第一表面142及一个第二表面144。该第一表面142与该第二表面144分别位于该电路板14的相背两侧，且该第一表面142与该第二表面144平行。该第二表面144与该入光面122正对且彼此平行。
该多个白光LED16与该多个蓝光LED18相互交替且彼此间隔地设置在该电路板14的第二表面144上，以排列成一条直线而与该入光面122正对。每个白光LED16包括一个蓝光芯片162、一个罩住该蓝光芯片162的玻璃罩164及涂覆在该玻璃罩164内表面的荧光粉166。该蓝光芯片162用于发出蓝光。该蓝光激发该荧光粉166以形成白光并从该玻璃罩164射出。该荧光粉166选自黄粉、RG荧光粉及Y+R荧光粉中任意一种。具体地，该荧光粉166的材料选自Y3Al5O12：Ce3+(YAG)，Tb3Al5O12：Ce3+(TAG)，氮化物及硅酸盐中任意一种。每个蓝光LED18包括一个蓝光芯片182及一个罩住该蓝光芯片182的玻璃罩184。该蓝光芯片182发出的蓝光从该玻璃罩184射出。
该第一偏光片20、该液晶面板30、该彩色滤光片40及该第二偏光片50依次排列在该出光面124的上方并均与该出光面124正对。该液晶面板30包括一个薄膜晶体管阵列基板32、一个液晶层34及一个定向层36。自该背光模组10到该彩色滤光片40的方向上，该薄膜晶体管阵列基板32、该液晶层34及该定向层36依次排列。该彩色滤光片40与该液晶面板30相对。该彩色滤光片40包括一仅供红色光线通过的红色色阻R、一仅供绿色光线通过的绿色色阻G及一供任何颜色的光线通过的透明色阻T。
该控制器60与该液晶面板30及该背光模组10电性连接。该控制器60用于根据输入信号控制该背光模组10中每个白光LED16及对应的蓝光LED18依时序开启，及控制该液晶面板30中的光阀以形成图像。
请结合图3，该液晶面板100工作时，该控制器60在第一时间内仅使多个白色LED16开启，每个白光LED16中的蓝光芯片162发出蓝光，该蓝光激发该荧光粉166以形成白光并从该玻璃罩164射出，从该玻璃罩164射出的白光从该入光面122进入该导光板12内部并在其内部经过多次反射之后从该出光面124出射，从该出光面124出射的白光依次经过该第一偏光片20、该液晶面板30、该彩色滤光片40及该第二偏光片50之后形成第一帧图像(a)。由于彩色滤光片40的红色色阻R仅供红色光线通过，绿色色阻G仅供绿色光线通过，透明色阻T可供任何颜色的光线，则该第一帧图像(a)具有红色R、绿色G及白色W的画面信息，其中，每个子像素的红色R、绿色G及白色W的灰阶值由需要显示图像的信息决定。该控制器60在该第一时间之后的第二时间内仅使该多个白色LED16对应的蓝色LED18开启，每个蓝色LED18中的蓝光芯片182发出蓝光并从该玻璃罩184射出，从该玻璃罩184射出的蓝光从该入光面122进入该导光板12内部并在其内部经过多次反射之后从该出光面124出射，从该出光面124出射的蓝光依次经过该第一偏光片20、该液晶面板30、该彩色滤光片40及该第二偏光片50之后形成第二帧图像(b)。由于彩色滤光片40的红色色阻R仅供红色光线通过，绿色色阻G仅供绿色光线通过，透明色阻T可供任何颜色的光线，则该第二帧图像(b)仅具有蓝色B的画面信息，其中，每个子像素的蓝色B的灰阶值由需要显示图像的信息决定。该第一帧图像(a)及该第二帧图像(b)叠加形成一幅供使用者观看的全彩图像。在此过程中，白色LED16的蓝光芯片162发出的蓝光及蓝色LED18的蓝光芯片182发出的蓝光的主波长波段相同，峰值波长在440-470nm之间，两种蓝光的主波长差异在5nm以内。
本实施例中的液晶显示装置100所产生的第一帧图像(a)具有红色R、绿色G及白色W的画面信息，第二帧图像(b)仅具有蓝色B的画面信息，则色裂现象得到了大大的减轻。而且本液晶显示装置100要显示一幅全彩图像，只需要在形成第一帧图像(a)及第二帧图像(b)时刷屏，刷屏频率只需要120HZ，该频率符合液晶分子的响应速度。另外，由于白色LED16及蓝色LED18均采用蓝色芯片发光，则白色LED16及蓝色LED18的寿命衰减曲线一致，大大减轻了背光模组10因长期使用而导致的颜色漂移。而且，由于白色LED16的能效大于目前红光和绿光单芯片的能效，可以降低背光模组10的驱动功耗。
实施例二
请参阅图4，本发明第二实施例提供的液晶显示装置的结构与第一实施例中的液晶显示装置100的结构基本相同，不同之处在于本实施例中的背光模组70与第一实施例中的背光模组10不同。具体为：该背光模组70为侧入式结构，其包括一个导光板72、一个第一电路板73、一个第二电路板74、多个发白光的白光LED76以及多个发蓝光的蓝光LED78。该多个白光LED76与该多个蓝光LED78一一对应。
该导光板72可为平板形结构或者楔形结构，其包括一个第一入光面722、一个第二入光面723及一个出光面724。该第一入光面722及该第二入光面723分别位于该导光板22相背的两侧，且该第一入光面722与该第二入光面723平行。该出光面724垂直连接该第一入光面722及该第二入光面723。
该第一电路板73及该第二电路板74分别位于该导光板72相背两侧且分别与该第一入光面722及该第二入光面723相对。该第一电路板73及该第二电路板74的具体结构与第一实施例中的该电路板14的具体结构完全相同。该多个蓝光LED78彼此间隔地设置在该第一电路板73上并排列成一条直线以与该第一入光面722正对，该多个白光LED76彼此间隔地设置在该第二电路板74上并排列成一条直线以与该第二入光面723正对。
本实施例中的液晶显示装置所具有的有益效果与第一实施例中的液晶显示装置100所具有的有益效果完全相同，而且，本实施例中的液晶显示装置的工作原理与第一实施例中的液晶显示装置100的工作原理完全相同，在此均不再赘述。
实施例三
请一并参阅图5及图6，本发明第三实施例提供的液晶显示装置的结构与第一实施例中的液晶显示装置100的结构基本相同，不同之处在于本实施例中的背光模组80与第一实施例中的背光模组10不同。具体为：该背光模组80为直下式结构，其包括一个导光板82、一个电路板84、多个发白光的白光LED86以及多个发蓝光的蓝光LED88。该多个白光LED86与该多个蓝光LED88一一对应。
该导光板82可为平板形结构或者楔形结构，其包括一个入光面822及一个出光面824。该入光面822与该出光面824分别位于该导光板82相背的两侧。
该电路板84位于该导光板82的下方并与该入光面822相对。该电路板84 的具体结构与第一实施例中的该电路板14的具体结构完全相同。一个白光LED86与对应的蓝光LED88共同组成一个LED发光组89，多个LED发光组89呈矩阵式排列在电路板84上并与该入光面822相对。多个LED发光组89中每个白光LED86与对应的蓝光LED88仍然如第一实施例一样依时序来启动，只是发出的光线是从入光面822进入导光板82中。
本实施例中的液晶显示装置所具有的有益效果与第一实施例中的液晶显示装置100所具有的有益效果完全相同，而且，本实施例中的液晶显示装置的工作原理与第一实施例中的液晶显示装置100的工作原理完全相同，在此均不再赘述。
以上所揭露的仅为本发明较佳实施例而已，当然不能以此来限定本发明之权利范围，因此依本发明权利要求所作的等同变化，仍属本发明所涵盖的范围。

Claims (17)

  1. 一种液晶显示装置，包括：
    背光模组，该背光模组包括导光板、多个发白光的白光发光二极管(LED)及与该多个白光LED对应并发蓝光的多个蓝光LED，该导光板包括入光面及出光面，该多个白光LED及该多个蓝光LED均与该入光面面对，每个白光LED包括用于发蓝光的蓝光芯片及被该蓝光激发的荧光粉，每个蓝光LED包括蓝光芯片；
    液晶面板，该液晶面板与该出光面相对以用于接收来自该背光模组的光线；
    彩色滤光片，该彩色滤光片与该液晶面板相对并用于接收穿过该液晶面板的光线，该彩色滤光片包括一仅供红色光线通过的红色色阻、一仅供绿色光线通过的绿色色阻及一供任何颜色的光线通过的透明色阻；及
    控制器，该控制器用于根据输入信号控制每个白光LED及对应的蓝光LED依时序开启，及控制该液晶面板中的光阀以形成图像；该控制器在第一时间内仅使该多个白色LED开启，及在该第一时间之后的第二时间内仅使与该多个白色LED对应的蓝色LED开启，每个白光LED及对应的蓝光LED发出的光线依序均经过该导光板、该液晶面板及该彩色滤光片后形成第一帧图像及第二帧图像，该第一帧图像及该第二帧图像叠加形成全彩图像。
  2. 如权利要求1所述的液晶显示装置，其特征在于，该液晶显示装置还包括第一偏光片，该第一偏光片位于该液晶面板与该背光模组之间。
  3. 如权利要求2所述的液晶显示装置，其特征在于，该液晶显示装置还包括第二偏光片，该第二偏光片与该彩色滤光片相对，且该第二偏光片与该液晶面板分别位于该彩色滤光片的相背两侧。
  4. 如权利要求1所述的液晶显示装置，其特征在于，该液晶面板包括薄膜晶体管阵列基板、液晶层及定向层，自该背光模组到该彩色滤光片的方向上，该薄膜晶体管阵列基板、该液晶层及该定向层依次排列。
  5. 如权利要求1所述的液晶显示装置，其特征在于，该背光模组为侧入式结构。
  6. 如权利要求5所述的液晶显示装置，其特征在于，该背光模组进一步包括一个电路板，该导光板包括一个入光面，该电路板与该入光面相对，该多个白光LED及该多个蓝光LED相互交替且彼此间隔地设置在该电路板上。
  7. 如权利要求6所述的液晶显示装置，其特征在于，该多个白光LED及该多个蓝光LED排列成一条直线。
  8. 如权利要求5所述的液晶显示装置，其特征在于，该背光模组进一步包括第一电路板及第二电路板，该导光板包括两个相背的第一入光面及第二入光面，该第一电路板及该第二电路板分别位于该导光板相背两侧且分别与该第一入光面及该第二入光面相对，该多个蓝光LED彼此间隔地设置在该第一电路板上，该多个白光LED彼此间隔地设置在该第二电路板上。
  9. 如权利要求8所述的液晶显示装置，其特征在于，该多个蓝光LED排列成一条直线，该多个白光LED排列成一条直线。
  10. 如权利要求1所述的液晶显示装置，其特征在于，该背光模组为直下式结构。
  11. 如权利要求10所述的液晶显示装置，其特征在于，该背光模组进一步包括一个电路板，该导光板包括一个入光面，该电路板与该入光面相对，一个白光LED与对应的蓝光LED共同组成一个LED发光组，多个LED发光组呈矩阵式排列在该电路板上并与该入光面相对。
  12. 如权利要求1所述的液晶显示装置，其特征在于，每个白光LED进一步包括玻璃罩，该玻璃罩罩住该蓝光芯片，该荧光粉涂覆在该玻璃罩的内表面。
  13. 如权利要求1所述的液晶显示装置，其特征在于，每个蓝光LED进一步包括玻璃罩，该玻璃罩罩住该蓝光芯片。
  14. 如权利要求1所述的液晶显示装置，其特征在于，该荧光粉选自黄粉、RG荧光粉及Y+R荧光粉中任意一种。
  15. 如权利要求1所述的液晶显示装置，其特征在于，该荧光粉的材料选自Y3Al5O12：Ce3+，Tb3Al5O12：Ce3+，氮化物，硅酸盐中任意一种。
  16. 如权利要求1所述的液晶显示装置，其特征在于，该导光板为平板形结构。
  17. 如权利要求1所述的液晶显示装置，其特征在于，该导光板为楔形结构。
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