WO2015149402A1 - Lcd显示装置实现高色饱的方法及背光模组 - Google Patents

Lcd显示装置实现高色饱的方法及背光模组 Download PDF

Info

Publication number
WO2015149402A1
WO2015149402A1 PCT/CN2014/075996 CN2014075996W WO2015149402A1 WO 2015149402 A1 WO2015149402 A1 WO 2015149402A1 CN 2014075996 W CN2014075996 W CN 2014075996W WO 2015149402 A1 WO2015149402 A1 WO 2015149402A1
Authority
WO
WIPO (PCT)
Prior art keywords
backlight module
display device
lcd display
led
notch filter
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2014/075996
Other languages
English (en)
French (fr)
Inventor
苏赞加
丘永元
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Technology Co Ltd
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 Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US14/368,294 priority Critical patent/US9791738B2/en
Publication of WO2015149402A1 publication Critical patent/WO2015149402A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133609—Direct backlight including means for improving the color mixing, e.g. white
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0026—Wavelength selective element, sheet or layer, e.g. filter or grating
    • 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
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • 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
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • 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
    • G02F1/133624—Illuminating devices characterised by their spectral emissions
    • 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
    • G02F2203/00—Function characteristic
    • G02F2203/05—Function characteristic wavelength dependent
    • G02F2203/055—Function characteristic wavelength dependent wavelength filtering

Definitions

  • LCD Due to the rapid development of OLED technology, LCD faces many challenges. Compared with OLED, LCD has certain weaknesses in terms of thinness, surface resilience and color saturation. In order to make the LCD comparable to OLED in the above performance, people pay more and more attention to the technical breakthrough in these aspects.
  • the color saturation of the liquid crystal is also called the color gamut, which represents the vividness of the color of the liquid crystal display. It is a very important parameter for liquid crystal products.
  • the color saturation is the numerator of the triangle area enclosed by the CIE (International Commission on Illumination) chromaticity diagram of the display's three primary colors.
  • the triangle area enclosed by the three primary colors specified by NTSC (National Television Standards Committee) is the denominator. To represent.
  • the prior art adjusts the color filter (CF) on the TFT liquid crystal cell (CeU), or uses a high color saturated LED light source (such as an LED containing red and green phosphors). , or LEDs with multi-color wafers, even using quantum dots as a form of phosphor) to achieve high color saturation of the LCD (NTSC is over 90%).
  • the way to achieve high color saturation is, in principle, the triangular area formed by the color points of the LCD's solid colors (R, G, B), as far as possible on the CIE chromaticity diagram to achieve a larger NTSC area.
  • Fig. 1 it is a schematic diagram of the performance of the RGB color point of the high color saturation on the CIE chromaticity diagram.
  • the half-peak width is reduced. Small (the color coordinate will be closer to the edge of the CIE chromaticity diagram); (2> The longer the wavelength of the corresponding peak R is, the closer the G wavelength is to 520 nm, and the shorter the B wavelength, the larger the area formed, ie, the higher the NTSC The higher the color saturation.
  • the mode (1) can be realized, and the half-width of the spectrum of R, G, and B can be reduced.
  • Color saturation can be optimized using both mode (1) and mode (2).
  • the RG phosphor LED (RG LED, containing two independent phosphor luminescence peaks of R and G, the non-traditional yttrium aluminum garnet (YAG) phosphor single peak) , or BR wafer LED (except for blue in traditional LEDs) Color chips, and red chips), these two LEDs are adjusted to the backlight, with the traditional TFT Cell (CF is not adjusted, with the traditional backlight NTS072%), NTSC can reach 80 93%, but can not achieve 100% super Wide color gamut, so there is still room for improvement.
  • YAG yttrium aluminum garnet
  • BR wafer LED except for blue in traditional LEDs
  • a notch filter is a kind of cutoff of a certain width in a full band, that is, in this band, the light is transparent.
  • the pass rate is close to ()), while still maintaining a high transmittance (transmission rate >90%) in the remaining bands.
  • Fig. 2 which is a breakthrough spectrum of a Notch Filter in the prior art, it can be seen that the center of the Notch Filter is 632.8 nm and the cutoff width is about 30 nm.
  • Another object of the present invention is to provide a backlight module for achieving high color saturation of an LCD display device, which enables the LCD display device to achieve high color saturation.
  • the present invention provides a method for achieving high color saturation of an LCD display device, wherein backlight light of the LCD display device is filtered through a notch filter and enters a liquid crystal cell of the LCD display device.
  • the cut-off center wavelength of the notch filter is 500 ⁇ .640 nm
  • the half-width of the cut-off band is 10 to 120 nm
  • the thickness of the notch filter is 0, 3 to 15 mm.
  • the backlight module of the LCD display device is a side-in backlight module or a direct-type backlight module.
  • the backlight module of the LCD display device uses an RG LED or a YAG LED.
  • the present invention also provides a backlight module for achieving high color saturation of an LCD display device, wherein the backlight module includes a notch filter, and backlight light of the backlight module is filtered through the notch filter.
  • the liquid crystal cell of the LCD display device has a cutoff center wavelength of 500 to 640 nm, a half-width of the cutoff band of 10 to 120 nm, and a thickness of the notch filter of 0.3 ⁇ 15 mm.
  • the backlight module is a side-in backlight module or a direct-lit backlight module.
  • the backlight module uses an RG LED or a YAG LED.
  • the notch filter may be selected to adhere to a light-emitting surface of the LED
  • the notch filter may be selected as: a sticky i on a light emitting surface of the LED;
  • the present invention also provides a backlight module for achieving high color saturation of an LCD display device, including a trap filter, wherein backlight light of the backlight module is filtered through the notch filter and enters the LCD display.
  • a liquid crystal cell of the device wherein the trap filter has a cutoff center wavelength of 500 to 640 nm, a cutoff wavelength band having a full width at half maximum of 10 to 120 nm, and a thickness of the notch filter of 0.3 to 15 mm;
  • the backlight module is a side-in backlight module or a direct-lit backlight module.
  • the backlight module uses RG LED or YAG LED.
  • the notch filter can be selected as:
  • the notch filter may be selected to adhere to the light emitting surface of the LED
  • the adhesive Pf is on the side of the liquid crystal cell facing the optical film.
  • the invention discloses a method for realizing high color saturation and a backlight module of the LCD display device, and proposes a novel
  • the high color saturation technology makes the color saturation different in different LED backlights.
  • Figure 1 is a schematic diagram showing the performance of a high-color RGB color point on a CIE chromaticity diagram
  • Figure 2 is a penetration spectrum of a Notch Filter in the prior art
  • Figure 3 is a schematic diagram showing the comparison of the spectrum of the YAG LED to which the method of the present invention is applied;
  • Figure 4 is a schematic diagram showing the comparison of the spectrum of the RG LED to which the method of the present invention is applied;
  • FIG. 5 is a schematic structural view of a preferred embodiment of a backlight module for achieving high color saturation of an LCD display device of the present invention
  • FIG. 6 is a schematic structural view of still another preferred embodiment of a backlight module for achieving high color saturation of an LCD display device of the present invention.
  • the invention provides a method for realizing high color saturation of an LCD display device, wherein the backlight light of the LCD display device is filtered through a notch filter and enters a liquid crystal cell of the LCD display device, and the cutoff center wavelength of the notch filter It is 500 to 640 nm, the half-width of the cutoff band is 10 120 nm, and the thickness of the notch filter is 0.3 to 15 mm.
  • the center position of the cutoff may be any value between 500 ⁇ .640 nm, for example, 600 nm, and the half width of the cutoff band is 10 to 120 nm, for example, 60 nm;
  • the filter thickness can be between 0.315 mm, for example 7 mm.
  • the invention adopts the Notch Filter filtering method to cut off the spectrum of the LED in a certain band, realizes the R and G parts in the LED spectrum, and has a separated spectrum distribution (or a narrower half-width), thereby making the LCD The color saturation is improved. For example, if the spectrum of the notch filter shown in Fig. 2 is used and the position of the cutoff band is appropriately adjusted, the LED spectrum required for the present invention can be adjusted.
  • the method of the present invention can be applied to a side-lit backlight module or a direct-lit backlight module, and
  • the backlight module of the LCD display device uses different LEDs, such as RG LED or YAG LED.
  • NTSC With traditional YAG LEDs, plus notch filters, and traditional TFT cells, NTSC can achieve significant improvements.
  • FIG 3 is a schematic diagram of the spectrum comparison of the YAG LED to which the method of the present invention is applied (3 ⁇ 4 Notch Filter, Notch Filter at 585 nm through the cutoff center), shows the spectrum of the YAG LED before and after the Notch Filter.
  • NTSC With the traditional TFT Ceii, NTSC can reach 100%.
  • FIG 4 there is a schematic diagram of the spectrum comparison of the RG LED to which the method of the present invention is applied (no Notch Filter. Noteli Filter at 585 nm through the cutoff center), indicating the spectrum of the RG LED before and after the Notch Filter. From the simulation results, after adding the Notch Filter, the brightness of the LED will be differently lost, but the chromaticity of the LCD is greatly improved. When using the RG LED, the NTSC can be 100%. The present invention is not necessary. High color saturated backlight solution with special CF design.
  • the cutoff center wavelength and the half width of the Notch Filter can be adjusted, and the NTSC can be improved to different extents, and when combined with the RG LED (with the traditional Cell), NTSC>10()% can be realized.
  • the present invention further provides a backlight module for achieving high color saturation of an LCD display device, wherein the backlight module includes a notch filter, and backlight light of the backlight module is filtered through the notch filter After entering the liquid crystal cell of the LCD display device, the cutoff filter has a cutoff center wavelength of 500 to 640 nm, a cutoff wavelength band having a full width at half maximum of 10 to 120 nm, and a thickness of the notch filter is 0.3 to 15 mm.
  • the backlight module can adopt RG LED or YAG LED.
  • the backlight module of the present invention can be a side-in backlight module or a direct-lit backlight module, and can be implemented based on various existing backlight modules.
  • FIG. 5 it is a schematic structural view of a preferred embodiment of a backlight module with high color saturation for an LCD display device of the present invention.
  • the backlight module of the j3 ⁇ 4 is used.
  • the backlight module includes: a backplane 2, a backlight 4 mounted in the backplane 2, and a backlight 4 mounted on the backplane 2 and located above the backlight 4.
  • the backlight 4 includes a plurality of LED strips 42.
  • Each of the LED strips 42 includes a plurality of LEDs 44.
  • the plurality of LEDs 44 are evenly spaced, and each of the LEDs 44 includes
  • the light-emitting chip 46 has a light-incident surface 62 disposed opposite to the backlight.
  • the light-incident surface 62 of the diffuser plate 6 is coated with a phosphor layer 5, and the light emitted by the LED lamp 44 is excited.
  • the phosphor layer 5 emits light, and the light emitted by the phosphor layer 5 is mixed with a part of the light emitted from the LED lamp 44 to form white light required for the backlight 4.
  • the LED lamp 44 includes a bracket (not shown), a light-emitting chip 46 mounted in the holder, and a sealing paste 49 for encapsulating the light-emitting chip 46 in the holder, wherein the encapsulant 49 is an epoxy resin.
  • the backlight 4 further includes a PCB board 48 mounted in the backboard 2, and the plurality of LED lamps 44 are mounted and electrically connected to the PCB board 48.
  • the back plate 2 includes a bottom plate 22 and a side plate 24 connecting the bottom plate 22, and the LED light bar 42 is mounted on the bottom plate 22 of the back plate 2.
  • the direct-lit backlight module further includes: a reflective sheet 7 disposed between the bottom plate 22 of the backboard 2 and the LED strip 42 and an optical film set 8 disposed on the diffusing plate 6, the light emitted by the backlight 4 is directly After being reflected by the reflection sheet 7, the white light required to be mixed into the phosphor layer 5 into a backlight is entered into the diffusion plate 6, and finally enters the optical film group 8, thereby providing a uniform surface light source.
  • the notch filter 1 is selected to be stuck to the light exiting surface of the LED lamp 44.
  • the notch filter can also be selected as: Adhered to the light exit surface of the lens (LED lens);
  • FIG. 6 a schematic structural view of another preferred embodiment of a backlight module with high color saturation of the LCD display device of the present invention is shown.
  • a side-lit backlight module is used.
  • the side-in-the-slide backlight module includes: a backplane 102, a backlight 104 mounted in the backplane 102, and a light guide panel 106 mounted in the backplane 102.
  • a reflective sheet 108 disposed between the light guide plate 106 and the back plate 102 and an optical film set 109 disposed above the light guide plate 106.
  • the backlight 104 includes a circuit board 142, and a plurality of mounting and electrically connecting the circuit board 142
  • the LED lamp 144 is mounted on the circuit board 142 and located between the LED lamps 144 and a plurality of heat dissipation fins 146 and a heat dissipation rail 148 perpendicularly connected to the heat dissipation fins 146.
  • the heat dissipation rails 148 are mounted on the backplane 102. on.
  • the backing plate 102 includes a bottom plate 122 and a plurality of side plates 124 vertically connected to the bottom plate 122, the bottom plate
  • the light guide plate 106 includes a bottom surface 162 facing the bottom plate 122 of the back plate 102, a top surface 164 disposed opposite to the bottom surface 162, and a plurality of sides disposed between the bottom surface 162 and the top surface 164, wherein the plurality of sides include at least one
  • the light-emitting surface 166 is fixedly mounted on the side plate 124 corresponding to the light-incident surface 166
  • the heat dissipation horizontal surface 148 is mounted on the bottom plate 122 of the back plate 102 .
  • the notch filter 100 is selected to adhere to the light exiting surface of the LED lamp 144.
  • the notch filter can also be selected as:
  • the LCD display device of the invention realizes a high color saturation method and a backlight module, and proposes a novel high color saturation technology, which enables the color saturation to be improved to different degrees in different LED backlights, even when matched with RG LEDs, NTSC Can reach 100%.

Landscapes

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

Abstract

一种LCD显示装置实现高色饱的方法及背光模组，包括陷波滤光片，背光模组背光光线经由陷波滤光片滤光后进入LCD显示装置的液晶盒，陷波滤光片的截止中心波长为500~640纳米，截止波段的半峰宽为10~120纳米，陷波滤光片的厚度为0.3~15毫米。这种新型的高色饱技术，使在不同的LED背光中，颜色饱和度得到不同程度的提高，甚至搭配RG LED时，NTSC可以达到100%。

Description

由于 OLED 技术的快速发展， LCD 面临众多的挑战， 比起 OLED， LCD 在薄型化、 可曲面化、 色彩饱和度等方面存在一定的弱势。 为了使 LCD 能在上述性能上能与 OLED 匹敌， 人们越来越重视在这些方面上的 技术攻克。
液晶的色彩饱和度又叫色域， 代表液晶显示器色彩的鲜艳程度， 是液 晶产品非常重要的参数。 色彩饱和度是以显示器三原色在 CIE (国际照明 委员会） 色度图上围成的三角形面积为分子， NTSC ((美国)国家电视标准 委员会） 所规定的三原色围成的三角形面积为分母， 求百分比来表示。 在 液晶的色彩饱和度方面， 现有技术中通过调整 TFT液晶盒 （CeU) 上的彩 色滤光片 （Color Filter, CF) ， 或者采用高色饱 LED光源 （如含有红色和 绿色荧光粉的 LED， 或者含有多色晶片的 LED， 甚至采用量子点作为荧光 粉的形式） ， 来实现 LCD的高色饱 （NTSC为 90%以上） 。
实现高色饱的方式， 认原理上来讲， 是把 LCD 的纯色 （R、 G、 B ) 的色点形成的三角形面积， 在 CIE色度图上尽可能的展开， 以达到更大的 NTSC面积。 如图 1所示， 其为实现高色饱的 RGB色点在 CIE色度图上. 的表现示意图。
为了使模组上 R、 G、 B 色点形成的面积更大， 可以通过如下两种方 式来实现： (1)对于模组的 R、 G、 B色点对应的频谱， 使半峰宽减小 （色 坐标会越接近 CIE色度图边缘） ； （2>使对应的峰位 R波长越长、 G波长 越接近 520nm、 B波长越短， 则形成的面积会越大， 即 NTSC越高， 色饱 和度越高。 根据上述两种方式， 一方面可以通过增加 CF 的厚度， 来实现 方式 (1)， 减小 R、 G、 B频谱的半峰宽， 另外， 通过调整 LED的方式， 可 同时利用方式 (1)和方式 (2)对色饱和度进行优化。
现有技术中， 在改变 LED 的方式中， 通过将 RG 荧光粉 LED (RG LED , 含有 R、 G 两种独立的荧光粉发光峰， 非传统的钇铝石榴石 ( YAG) 荧光粉单峰） ， 或者 BR晶片 LED (除了含有传统 LED 中的蓝 色晶片， 还有红色晶片） ， 这两种 LED 调整到背光中， 搭配传统的 TFT Cell ( CF 未做调整， 搭配传统背光 NTS072%) ， NTSC 可以达到 80 93%, 但无法实现 100%的超广色域， 因此还有待改进。
另一方面， 现有技术中己知陷波滤光片 （Not h Filter) 是一种在全波 段中， 对某一特定峰位， 进行一定宽度的截止 （即在该波段下， 光的透过 率接近 （)） ， 而在其余的波段仍保持较高的透过率 （透过率>90%) 。 参见 图 2， 其为现有技术中一款 Notch Filter的穿透谱， 可以看到该款皱波型陷 波滤光片 （Notch Filter) 的中心截止为 632.8nm， 截止宽度约为 30nm。
因此， 本发明的目的在于提供一种 LCD 显示装置实现高色饱的方 法， 使 LCD显示装置实现高色饱。
本发明的另一目的在于提供一种 LCD 显示装置实现高色饱的背光模 组， 使 LCD显示装置实现高色饱。
为实现上述 的， 本发明提供了一种 LCD 显示装置实现高色饱的方 法， 所述 LCD显示装置的背光光线经由陷波滤光片滤光后进入所述 LCD 显示装置的液晶盒， 所述陷波滤光片的截止中心波长为 500·、.640纳米， 截 止波段的半峰宽为 10〜120纳米， 所述陷波滤光片的厚度为 0,3〜15毫米。
其中， 所述 LCD 显示装置的背光模组为侧入式背光模组或直下式背 光模组。
其中， 所述 LCD显示装置的背光模组采用 RG LED或 YAG LED。 本发明还提供了一种 LCD 显示装置实现高色饱的背光模组， 所述背 光模组包括陷波滤光片， 所述背光模组的背光光线经由所述陷波滤光片滤 光后进入所述 LCD 显示装置的液晶盒， 所述陷波滤光片的截止中心波长 为 500〜640纳米， 截止波段的半峰宽为 10〜120纳米， 所述陷波滤光片的 厚度为 0.3〜15毫米。
其中， 所述背光模组为侧入式背光模组或直下式背光模组。
其中， 所述背光模组采用 RG LED或 YAG LED。
其中， 在所述侧入式背光模组中， 所述陷波滤光片可以选择为： 粘附在 LED的出光面；
粘 W在导光板与 LED正对的入光面；
置于 LED出光面与导光板入光面之间；
置于导光板与光学膜片之间；
置于任意两张光学膜片之间； 置于最顶层的光学膜片的上方； 或者
粘附于液晶盒的与光学膜片相面对的一面。
其中， 在所述直下式背光模组中， 所述陷波滤光片可以选择为： 粘 i 在 LED的出光面；
粘附在透镜的出光面；
置于扩散板的下表面；
置于扩散板与光学膜片之间；
置于任意两张光学膜片之间；
置于最顶层的光学膜片的上方； 或者
粘附于液晶盒的与光学膜片相面对的一面。
本发明还提供了一种 LCD 显示装置实现高色饱的背光模组， 包括陷 波滤光片， 所述背光模组的背光光线经由所述陷波滤光片滤光后进入所述 LCD 显示装置的液晶盒， 所述陷波滤光片的截止中心波长为 500〜640 纳 米， 截止波段的半峰宽为 10〜120 纳米， 所述陷波滤光片的厚度为 0.3〜15 毫米；
其中， 所述背光模组为侧入式背光模组或直下式背光模组。
所述背光模组采用 RG LED或 YAG LED。
在所述側入式背光模组中， 所述陷波滤光片可以选择为：
粘附在 LED的出光面；
粘附在导光板与 LED正对的入光面；
置于 LED出光面与导光板入光面之间；
置于导光板与光学膜片之间；
置于任意两张光学膜片之间；
置于最顶层的光学膜片的上方； 或者
粘附于液晶盒的与光学膜片相面对的一面。
在所述直下式背光模组中， 所述陷波滤光片可以选择为- 粘附在 LED的出光面；
粘附在透镜的出光面；
置于扩散板的下表面；
置于扩散板与光学膜片之间；
置于任意两张光学膜片之间；
置于最顶层的光学膜片的上方； 或者
粘 Pf†于液晶盒的与光学膜片相面对的一面。
本发明 LCD 显示装置实现高色饱的方法及背光模组， 提出一种新型 的高色饱技术， 使在不同的 LED 背光中， 颜色饱和度得到不同程度的提
下面结合附图， 通过对本发明的具体实施方式详细描述， 将使本发 的技术方案及其他有益效果显而易见。
附图中，
图 1为实现高色饱的 RGB色点在 CIE色度图上的表现示意图； 图 2为现有技术中一款 Notch Filter的穿透谱；
图 3为应用了本发明方法的 YAG LED的频谱比较示意图；
图 4为应用了本发明方法的 RG LED的频谱比较示意图；
图 5 为本发明 LCD显示装置实现高色饱的背光模组一较佳实施例的 结构示意图；
图 6 为本发明 LCD 显示装置实现高色饱的背光模组又一较佳实施例 的结构示意图。
本发明提供了一种 LCD显示装置实现高色饱的方法， 使 LCD显示装 置的背光光线经由陷波滤光片滤光后进入 LCD 显示装置的液晶盒， 该陷 波滤光片的截止中心波长为 500〜640 纳米， 截止波段的半峰宽为 10 120 纳米， 该陷波滤光片的厚度为 0.3〜15毫米。 陷波滤光片的穿透谱中， 截止 的中心位置可以选 500·、.640纳米之间任意值， 例如 600纳米， 截止波段的 半峰宽在 10〜120纳米， 例如 60纳米； 陷波滤光片厚度可以在 0.3 15毫米 之间， 例如 7毫米。
本发明通过采用 Notch Filter滤光的方式， 对 LED的频谱进行某一波 段的截止， 实现 LED频谱中 R、 G的部分， 拥有分离的频谱分布 （或者更 窄的半峰宽） ， 从而使 LCD 的色饱和度得到提升。 例如若采用图 2所示 的陷波滤光片的频谱， 并且适当调整截止波段的位置， 可以调整至本发明 所需要的 LED频谱。
本发明的方法可以应用于侧入式背光模组或直下式背光模组， 并且
LCD显示装置的背光模组采用不同的 LED， 例如 RG LED或 YAG LED。
以下为不同 LED搭配不同参数的 Notch Filter后的模拟结果比较： 表一、 搭配 YAG LED与传统 72% NTSC的液晶: k ( Cell)
Notch 无 605 600 595 590 585 580 575 570 565
Filter 截 Notch
止中心 Filter
(mil)
LED 经 100 77 75 72 69 64 64 62 60 59 过 Notch
Filter 后
ah ¾ Fu
(%)
NTSC 72 79 86 90 93 93 93 91 88 82
(%)
若采用传统的 YAG LED, 加上陷波滤光片， 搭配传统的 TFT Cell, NTSC可以实现大幅度的提升。
参见图 3， 其为应用了本发明方法的 YAG LED 的频谱比较示意图 ( ¾ Notch Filter, 经过截止中心在 585nm的 Notch Filter) ， 示意了 YAG LED经过 Notch Filter前后的频谱。
表二、 搭配 RG LED与传统 72% NTSC的液晶盒 （Cell )
Figure imgf000006_0001
滤光片 (Notch Filter) ， 搭配传统的 TFT Ceii， NTSC可以达到 100%。
参见图 4， 其为应用了本发明方法的 RG LED的频谱比较示意图 （无 Notch Filter. 经过截止中心在 585nm的 Noteli Filter) ， 示意了 RG LED经 过 Notch Filter前后的频谱。 从模拟结果看到， 加入 Notch Filter之后， LED 的亮度会有不同程度 的损耗， 但 LCD的色度得到较大的提升， 使用 RG LED时更是可以达到 NTSC 100%, 本发明是一种无需搭配特殊 CF 设计的高色饱背光解决方 案。 本发明中， 搭配不同 LED， 调整 Notch Filter的截止中心波长及半峰 宽， 可以在不同程度上实现 NTSC的提高， 且搭配 RG LED时 （搭配传统 Cell) ， 可以实现 NTSC>10()%。
相应的， 本发明还提供了 LCD 显示装置实现高色饱的背光模组， 所 述背光模组包括陷波滤光片， 所述背光模组的背光光线经由所述陷波滤光 片滤光后进入所述 LCD 显示装置的液晶盒， 所述陷波滤光片的截止中心 波长为 500〜640纳米， 截止波段的半峰宽为 10〜120纳米， 所述陷波滤光 片的厚度为 0.3〜15毫米。 所述背光模组可以采用 RG LED或 YAG LED。
本发明的背光模组可以为侧入式背光模组或直下式背光模组， 可以基 于各种现有的背光模组来实现。
参见图 5， 其为本发明 LCD显示装置实现高色饱的背光模组一较佳实 施例的结构示意图。 该较佳实施例中采 j¾直下式背光模组， 该直下式背光 模组包括： 背板 2、 安装于背板 2内的背光源 4及安装于背板 2上且位于 背光源 4上方的扩散板 6， 以及陷波滤光片 1。
所述背光源 4包括数条 LED灯条 42， 所述每条 LED灯条 42包括数 个 LED 灯 44， 优选的， 所述数个 LED 灯 44 均匀间隔设置， 所述每个 LED灯 44包括有发光芯片 46， 所述扩散板 6具有一相对背光源设置的入 光面 62， 所述扩散板 6的入光面 62上涂覆有荧光粉层 5， 所述 LED灯 44 发出的光激发荧光粉层 5 发光， 所述荧光粉层 5 受激发发出的光与 LED 灯 44发出的部分光混合成背光源 4所需的白光。 LED灯 44括支架 （未图 示） 、 安装于支架内的发光芯片 46、 及将发光芯片 46封装于支架内的封 装胶 49， 其中， 所述封装胶 49为环氧树脂。
所述背光源 4还包括一安装于背板 2内的 PCB板 48， 所述数个 LED 灯 44安装并电性连接于该 PCB板 48上。 背板 2包括底板 22及连接底板 22的侧板 24， 所述 LED灯条 42安装于背板 2的底板 22上。 该直下式背 光模组还包括； 设于背板 2底板 22与 LED灯条 42之间的反射片 7及设 于扩散板 6上的光学膜片组 8， 所述背光源 4发出的光线直接、 或经由反 射片 7 反射后进入荧光粉层 5 混合成背光源所需的白光， 再进入扩散板 6， 最后进入光学膜片组 8， 进而提供均匀的面光源。 该较佳实施例中， 陷 波滤光片 1选择为粘險在 LED灯 44的出光面。 而且， 陷波滤光片还可以 选择为： 粘附在透镜 （LED透镜） 的出光面；
置于扩散板的下表面；
置于扩散板与光学膜片之间；
置于任意两张光学膜片之间；
置于最顶层的光学膜片的上方； 或者
粘附于液晶盒的与光学膜片相面对的一面。
参见图 6， 其为本发明 LCD显示装置实现高色饱的背光模组又一较佳 实施例的结构示意图。 该较佳实施例中采用侧入式背光模组， 该侧入式背 光模组， 包括： 背板 102、 安装于背板 102 内的背光源 104、 安装于背板 102内的导光板 106、 设于导光板 106与背板 102之间的反射片 108及设 于导光板 106上方的光学膜片组 109， 所述背光源 104包括电路板 142、 安装并电性连接电路板 142的数个 LED灯 144、 安装于电路板 142上且位 于 LED灯 144之间的数个散热竖片 146及垂直连接散热竖片 146的散热 横片 148， 所述散热横片 148安装于所述背板 102上。
背板 102包括底板 122及垂直连接底板 122的数个侧板 124， 该底板
122 .与侧板 124形成一容置空间 242， 所述背光源 104、 导光板 106容置于 该容置空间 242 内。 导光板 106 包括朝向背板 102 的底板 122 的底面 162、 与底面 162相对设置的顶面 164及设于底面 162与顶面 164之间的 数个侧面， 所述数个侧面中包括至少一个入光面 166， 所述背光源 4 的电 路板 142对应所述入光面 166固定安装于所述侧板 124上， 所述散热横片 148 安装于所述背板 102 的底板 122 上。 该较佳实施例中， 陷波滤光片 100选择为粘跗在 LED灯 144的出光面上。 而且， 陷波滤光片还可以选择 为:
粘附在导光板与 LED正对的入光面；
置于 LED出光面与导光板入光面之间；
置于导光板与光学膜片之间；
置于任意两张光学膜片之间；
置于最顶层的光学膜片的上方； 或者
粘附于液晶盒的与光学膜片相面对的一面。
本发明 LCD 显示装置实现高色饱的方法及背光模组， 提出一种新型 的高色饱技术， 使在不同的 LED 背光中， 颜色饱和度得到不同程度的提 高， 甚至搭配 RG LED时， NTSC可以达到 100%。
以上所述， 对于本领域的普通技术人员来说， 可以根据本发明的技术 方案和技术构思作出其他各种相应的改变和变形， 而所有这些改变和变形

Claims

1、 一种 LCD显示装置实现高色饱的方法， 所述 LCD显示装置的背 光光线经由陷波滤光片滤光后进入所述 LCD 显示装置的液晶盒， 所述陷 波滤光片的截止中心波长为 500〜640 纳米， 截 ill波段的半峰宽为 10〜120 纳米， 所述陷波滤光片的厚度为 0.3〜15毫米。
2、 如权利要求 1所述的 LCD显示装置实现高色饱的方法， 其中， 所 述 LCD显示装置的背光模组为侧入式背光模组或直下式背光模组。
3、 如权利要求 1 所述的 LCD显示装置实现高色饱的方法， 其中， 所 述 LCD显示装置的背光模组采用 RG LED或 YAG LED。
4、 一种 LCD显示装置实现高色饱的背光模组， 包括陷波滤光片， 所 述背光模组的背光光线经由所述陷波滤光片滤光后进入所述 LCD 显示装 置的液晶盒， 所述陷波滤光片的截止中心波长为 500〜640纳米， 截止波段 的半峰宽为 10〜120纳米， 所述陷波滤光片的厚度为 0.3〜15毫米。
5、 如权利要求 4所述的 LCD显示装置实现高色饱的方法， 其中， 所 述背光模组为侧入式背光模组或直下式背光模组。
6、 如权利要求 4所述的 LCD显示装置实现高色饱的方法， 其中， 所 述背光模组采用 RG LED或 YAG LED。
Ί、 如权利要求 5所述的 LCD显示装置实现高色饱的方法， 其中， 在 所述侧入式背光模组中， 所述陷波滤光片可以选择为：
粘 i 在 LED的出光面；
粘附在导光板与 LED正对的入光面；
置于 LED出光面与导光板入光面之间；
置于导光板与光学膜片之间；
置于任意两张光学膜片之间；
置于最顶层的光学膜片的上方； 或者
粘附于液晶盒的与光学膜片相面对的一面。
8、 如权利要求 5所述的 LCD显示装置实现高色饱的方法， 其中， 在 所述直下式背光模组中， 所述陷波滤光片可以选择为；
粘對在 LED的出光面；
粘附在透镜的出光面；
置于扩散板的下表面；
置于扩散板与光学膜片之间； 置于任意两张光学膜片之间；
置于最顶层的光学膜片的上方； 或者
粘附于液晶盒的与光学膜片相面对的一面。
9、 一种 LCD显示装置实现高色饱的背光模组， 包括陷波滤光片， 所 述背光模组的背光光线经由所述陷波滤光片滤光后进入所述 LCD 显示装 置的液晶盒， 所述陷波滤光片的截止中心波长为 5()0〜640纳米， 截止波段 的半峰宽为 10〜120纳米， 所述陷波滤光片的厚度为 0„3〜15毫米；
其中， 所述背光模组为侧入式背光模组或直下式背光模组。
10、 如权利要求 9所述的 LCD显示装置实现高色饱的方法， 其中， 所述背光模组采用 RG LED或 YAG LED。
I 如权利要求 9所述的 LCD显示装置实现高色饱的方法， 其中， 在所述侧入式背光模组中， 所述陷波滤光片可以选择为：
粘對在 LED的出光面；
粘附在导光板与 LED正对的入光面；
置于 LED出光面与导光板入光面之间；
置于导光板与光学膜片之间；
置于任意两张光学膜片之间；
置于最顶层的光学膜片的上方； 或者
粘附于液晶盒的与光学膜片相面对的一面。
12、 如权利要求 9所述的 LCD 显示装置实现高色饱的方法， 其中， 在所述直下式背光模组中， 所述陷波滤光片可以选择为：
粘 i 在 LED的出光面；
粘附在透镜的出光面；
置于扩散板的下表面；
置于扩散板与光学膜片之间；
置于任意两张光学膜片之间；
置于最顶层的光学膜片的上方； 或者
粘附于液晶盒的与光学膜片相面对的一面。
PCT/CN2014/075996 2014-04-03 2014-04-22 Lcd显示装置实现高色饱的方法及背光模组 Ceased WO2015149402A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/368,294 US9791738B2 (en) 2014-04-03 2014-04-22 Method and backlight module that achieve high color satuationof LCD (liquid crystal display) device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201410134625.7 2014-04-03
CN201410134625.7A CN103885244A (zh) 2014-04-03 2014-04-03 Lcd显示装置实现高色饱的方法及背光模组

Publications (1)

Publication Number Publication Date
WO2015149402A1 true WO2015149402A1 (zh) 2015-10-08

Family

ID=50954213

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/075996 Ceased WO2015149402A1 (zh) 2014-04-03 2014-04-22 Lcd显示装置实现高色饱的方法及背光模组

Country Status (3)

Country Link
US (1) US9791738B2 (zh)
CN (1) CN103885244A (zh)
WO (1) WO2015149402A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105068303B (zh) * 2015-09-11 2018-08-07 深圳市华星光电技术有限公司 阵列基板和液晶显示面板
CN109799645B (zh) * 2019-03-15 2022-05-31 惠州市华星光电技术有限公司 背光模组以及显示装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5414546A (en) * 1988-08-10 1995-05-09 Fergason; James L. Dynamic optical notch filter
US5737045A (en) * 1995-09-22 1998-04-07 Ois Optical Imaging Systems, Inc. LCD with notch filter
JP3723409B2 (ja) * 2000-03-31 2005-12-07 シャープ株式会社 波長選択素子およびそれを用いた表示装置
CN103680367A (zh) * 2012-09-19 2014-03-26 杜比实验室特许公司 量子点/远程荧光显示系统改进

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3848623B2 (ja) * 2003-01-16 2006-11-22 松下電器産業株式会社 蛍光測定装置
KR101171182B1 (ko) * 2005-08-05 2012-08-06 삼성전자주식회사 백라이트 유닛 및 이를 사용한 액정 표시 장치
KR101304410B1 (ko) * 2006-09-19 2013-09-05 삼성디스플레이 주식회사 액정 표시 장치
KR20090086410A (ko) * 2006-10-18 2009-08-12 리얼 디 Ｌｅｄ 조명기 필터
CN101656337A (zh) * 2009-09-09 2010-02-24 华东交通大学 一种新型的双模带通滤波器
CN101916892B (zh) * 2010-06-29 2013-04-10 华南理工大学 基于模块化结构的绝对带宽恒定的可调带阻滤波器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5414546A (en) * 1988-08-10 1995-05-09 Fergason; James L. Dynamic optical notch filter
US5737045A (en) * 1995-09-22 1998-04-07 Ois Optical Imaging Systems, Inc. LCD with notch filter
JP3723409B2 (ja) * 2000-03-31 2005-12-07 シャープ株式会社 波長選択素子およびそれを用いた表示装置
CN103680367A (zh) * 2012-09-19 2014-03-26 杜比实验室特许公司 量子点/远程荧光显示系统改进

Also Published As

Publication number Publication date
US20160313605A1 (en) 2016-10-27
CN103885244A (zh) 2014-06-25
US9791738B2 (en) 2017-10-17

Similar Documents

Publication Publication Date Title
CN104483778B (zh) 发光装置、背光模组及液晶显示装置
US8928220B2 (en) White light emitting device and display apparatus
CN104298001B (zh) 直下式背光模组及其制造方法
US20080180948A1 (en) White light emitting device and light source module for liquid crystal display backlight using the same
KR20120088273A (ko) 백라이트 유닛 및 그 제조 방법
JP2012215827A (ja) 発光ダイオードパッケージ及びそれを有する表示装置
CN1932370A (zh) 照明设备和具有该照明设备的显示设备
US20140002770A1 (en) Method for manufacturing fluorescent powder substrate and liquid crystal module using fluorescent powder substrate
EP2328190A2 (en) White light emitting device and white light source module using the same
CN102147074A (zh) 直下式超薄led背光模组
CN107180902A (zh) Led灯珠和led光源
CN206497278U (zh) 一种量子点显示装置
KR102371290B1 (ko) 광원 패키지 및 그를 포함하는 백라이트 유닛
CN108767100A (zh) 背光模组及其制作方法
KR20180101111A (ko) 디스플레이 디바이스
CN104360539A (zh) 一种背光模组及液晶显示器件
TWI539621B (zh) Ｌｅｄ封裝件及具有其之背光單元
CN203771224U (zh) 一种显示装置及其背光模组
WO2016155115A1 (zh) 导光板及具有该导光板的背光模块和液晶显示器
KR101564067B1 (ko) 색재현율 개선제를 이용한 디스플레이 백라이트 유닛(blu)용 발광다이오드 소자
WO2015149402A1 (zh) Lcd显示装置实现高色饱的方法及背光模组
CN103712127B (zh) 一种光源组件、背光模组和显示装置
KR102344303B1 (ko) 광변환 시트 및 그를 포함하는 백라이트 유닛
KR20170026883A (ko) 발광다이오드 램프 및 이를 포함하는 액정표시장치
CN1825183A (zh) 液晶显示装置及发光装置

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 14368294

Country of ref document: US

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14888417

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase
122 Ep: pct application non-entry in european phase

Ref document number: 14888417

Country of ref document: EP

Kind code of ref document: A1