WO2013116970A1 - 一种用于液晶显示器的新型背光模组 - Google Patents

一种用于液晶显示器的新型背光模组 Download PDF

Info

Publication number
WO2013116970A1
WO2013116970A1 PCT/CN2012/001733 CN2012001733W WO2013116970A1 WO 2013116970 A1 WO2013116970 A1 WO 2013116970A1 CN 2012001733 W CN2012001733 W CN 2012001733W WO 2013116970 A1 WO2013116970 A1 WO 2013116970A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
prism
liquid crystal
emitting surface
deflection
Prior art date
Application number
PCT/CN2012/001733
Other languages
English (en)
French (fr)
Inventor
李同
Original Assignee
苏州晶智科技有限公司
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 苏州晶智科技有限公司 filed Critical 苏州晶智科技有限公司
Priority to KR1020147025305A priority Critical patent/KR20140138158A/ko
Priority to EP12868306.7A priority patent/EP2813751A4/en
Priority to JP2014555910A priority patent/JP6170072B2/ja
Publication of WO2013116970A1 publication Critical patent/WO2013116970A1/zh
Priority to US14/454,740 priority patent/US9715141B2/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
    • G02B6/0046—Tapered light guide, e.g. wedge-shaped 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
    • G02B6/0033—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
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/0808—Mirrors having a single reflecting layer
    • 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
    • G02B6/0055—Reflecting element, sheet or layer
    • 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
    • G02B6/0063—Means for improving the coupling-out of light from the light guide for extracting light out both the major surfaces of the light guide
    • 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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
    • 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
    • G02F1/133616—Front illuminating devices

Definitions

  • the present invention relates to a backlight module for a liquid crystal display, and more particularly to a novel backlight module for a liquid crystal display for generating a parallel plane beam.
  • liquid crystal displays Since the 1970s, liquid crystal displays have been used in electronic devices due to their low cost, high resolution, and bright colors, ranging from small-sized watches to large-sized TVs.
  • the liquid crystal displays that have evolved to the present day have higher resolution, compact structure, high brightness, and low cost.
  • liquid crystal displays have problems such as low light source utilization, low resolution, and color shift due to insufficient backlight limitations.
  • the liquid crystal in the liquid crystal display panel itself does not have a light-emitting characteristic, and the backlight module is used to provide a light source to achieve the display effect of the display.
  • the backlight uses a light emitting diode (LED) or a cold cathode fluorescent source (CCFL) as a light source, and the light from the source is coupled into the display through a light guide (LGP).
  • LED light emitting diode
  • CCFL cold cathode fluorescent source
  • the divergence angle of the light source is large, and the energy actually used to enter the LGP is less than 10%, resulting in a decrease in the efficiency of the entire display.
  • liquid crystal displays such as mobile phones, calculators, watches, etc., which were used for personal use, were developed. These small-sized displays emphasize lightness, compactness, and low power consumption. These requirements place higher demands on the structure of the backlight, the angle of illumination of the light source, and the efficiency of use of the light source.
  • HDTV high-size TVs
  • the LC liquid crystal
  • the LC has a high light utilization rate for the paraxial source from the backlight. Therefore, if the divergence angle of the backlight is large, the light source utilization rate is lowered, and the large angle is off-axis. Light can cause problems such as reduced contrast, light leakage, and color washout.
  • the light emitted from the backlight module usually has a certain collimation requirement.
  • the backlight module structure is shown in Figure 1.
  • the backlight module 1 includes a light guide plate 10, a prism sheet 12, and a diffusion sheet 14.
  • the top surface 124 is emitted in the normal direction and propagates in the direction of the diffusion sheet 14.
  • the backlight module 1 can provide a kind of collimated light, the divergence angle of the collimated light provided is too large and it is difficult to effectively reduce it.
  • the size of the reflective structure 128 is large, the divergence angle of the reflected light is large. Therefore, in order to reduce the divergence angle of the emitted light and improve the collimation of the emitted light, it is necessary to make the reflective structure 128. Precision, increasing the difficulty and cost of the manufacturing process.
  • the collimating reflective film is located at the bottom of the backlight module, and is generally similar to a ship-shaped structure, and the light source is located at both ends of the collimating reflective film.
  • the collimating reflective film comprises a light incident surface, which is also a reflective surface, and has a zigzag structure. Each saw tooth is designed with different angles and slopes. The light of different angles emitted by the light source is reflected by the sawtooth of different angles and slopes, and the direction is changed to be perpendicular to the direction of the liquid crystal screen.
  • each saw tooth has a specific angle and slope, which is very difficult to process and costly to manufacture.
  • the technical problem to be solved by the present invention is to provide a novel backlight module for a liquid crystal display with high collimation light and high light utilization efficiency.
  • a novel backlight module for a liquid crystal display comprising a light source sequentially disposed in front of the liquid crystal screen, a triangular wedge body for generating a parallel beam, a reflection device, and a deflection standard a straight-shaped assembly
  • the triangular wedge body includes a first light-incident surface, a first light-emitting surface, and a second light-emitting surface, wherein an angle between the first light-emitting surface and the second light-emitting surface is less than or equal to 5°
  • the first light incident surface is opposite to the light source, and the reflecting device is disposed on a side of the first light emitting surface for reflecting the light emitted from the first light emitting surface back to the triangular wedge body
  • the deflection collimating assembly is disposed on the second light emitting surface and the Between the liquid crystal panels, the parallel light beam for emitting the second light exiting surface is refracted into light rays perpendicular to
  • the deflection collimating assembly includes a deflection prism group and a collimating prism composed of a plurality of parallelogram prisms arranged in parallel, the deflection prism group being in a parallelogram array in a one-dimensional direction, and the parallelogram prism
  • the acute angle is greater than or equal to 45 degrees
  • the parallelogram prism includes a second light incident surface and a third light exit surface, and the second light incident surface is parallel to the second light exit surface, and the parallelogram prism and the prism
  • the acute angle adjacent to the second light incident surface is on the side of the first light incident surface, and the obtuse angle is close to the intersection of the first light exit surface and the second light exit surface
  • the third light incident surface and the fourth light emitting surface are parallel to the third light emitting surface, and the fourth light emitting surface is formed by a plurality of juxtaposed serrations in a one-dimensional direction. In an asymmetrical zigzag shape, the angle between the
  • the deflection prism group and the collimating prism may be integrally combined to form a deflection collimating prism, and the third light incident surface and the third light emitting surface coincide with each other.
  • the deflection collimating assembly includes a deflection prism group and a collimating prism composed of a plurality of parallelogram prisms arranged in parallel, the deflection prism group being in a parallelogram array in a one-dimensional direction, and the parallelogram prism
  • the acute angle is greater than or equal to 45 degrees
  • the parallelogram prism includes a second light incident surface and a third light exit surface, and the second light incident surface is parallel to the second light exit surface
  • the parallelogram prism and the prism The acute angle adjacent to the second light incident surface is on the side of the first light incident surface, and the obtuse angle is close to the intersection of the first light exit surface and the second light exit surface
  • the collimating prism a third light incident surface and a fifth light emitting surface, wherein the third light incident surface is parallel to the third light emitting surface, the fifth light emitting surface is parallel to the liquid crystal panel, and the second The wedge angle between the light incident surface and the fifth light exit surface is less than or equal to 10
  • the deflecting prism group and the collimating prism may also be integrally combined to form a wedge prism, and the third light incident surface and the third light emitting surface coincide with each other.
  • the reflective device is a reflective film made of an optical material, and the surface of the reflective film is plated with a metal or a medium to form a reflective surface, and the reflective surface is parallel to the first light-emitting surface.
  • the triangular wedge is a triangular wedge film made of optical material.
  • the parallelogram prism is a parallelogram prism film made of an optical material
  • the collimating prism is a collimating prism film made of an optical material
  • the deflecting collimating prism is a deflecting collimating prism film made of an optical material.
  • the wedge prism is a wedge prism film made of an optical material.
  • the invention has the advantages of improving the light leakage, color shift and contrast of the conventional liquid crystal display.
  • the problem of lowness is that the components of the backlight module have a simple structure, are difficult to manufacture and cost, and have good collimation of the parallel beams and a very high utilization rate of the light source.
  • FIG. 1 is a schematic cross-sectional structural view of a backlight module of the prior art
  • FIG. 2 is a schematic cross-sectional structural view of another prior art backlight module
  • FIG. 3 is a schematic structural diagram of a backlight module according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic view showing the working principle of a triangular wedge-shaped (membrane) body according to the present invention.
  • Figure 5 (a) is a light distribution diagram of a light source of the present invention.
  • Figure 5 (b) is a view showing the angle distribution of light rays after passing through the triangular wedge-shaped (membrane) body of the present invention
  • FIG. 6 is a light path trajectory of a triangular wedge-shaped (membrane) body and a parallelogram prism (film) according to a first embodiment of the present invention
  • Figure 7 is a graph of reflection from light to light, according to Snell's law
  • FIG. 8 is a schematic view showing the working principle of a parallelogram prism (film) according to Embodiment 1 of the present invention.
  • FIG. 9 is a schematic view showing the operation of a collimating prism (film) according to Embodiment 1 of the present invention.
  • Figure 10 is a schematic view showing the structure of the deflection collimating prism (film) of the second embodiment of the present invention by further combining the deflection prism (film) group of the first embodiment with the collimating prism (film);
  • FIG. 11 is a schematic diagram of an outgoing light beam after the light emitted by the software analog light source passes through the backlight module of the present invention
  • FIG. 12 is a schematic structural view of Embodiment 3 of the present invention.
  • FIG. 13 is a schematic structural diagram of a backlight module according to Embodiment 4 of the present invention.
  • a novel backlight module for a liquid crystal display includes an LED light source 2, a light source reflector 3, and an optical material for generating parallel beams, which are sequentially disposed in front of the liquid crystal panel 1.
  • a triangular wedge film 4 a reflective film 5 made of an optical material, a deflection prism film group 6 made of an optical material, and a collimating prism film 7 made of an optical material, the triangular wedge film 4 including a first light incident surface 41, A light exiting surface 42 and a second light exiting surface 43, an angle 0 between the first light exiting surface 42 and the second light exiting surface 43 is 5°, the first light incident surface 41 is opposite to the light source 2, and the reflective film 5 is disposed at the first On the light-emitting surface 42 side, the surface of the reflective film 5 is plated with a metal to form a reflecting surface 51.
  • the reflecting surface 51 is parallel to the first light-emitting surface 42 and is used to reflect the light emitted from the first light-emitting surface 42 back to the triangular wedge-shaped film 4, in the second Light surface 43
  • the parallelogram prism film group 6 and the collimating prism film 7 which are sequentially disposed between the liquid crystal panel 1 and the collimating prism film 7 constitute a deflection collimating unit for refracting the parallel light beam emitted from the second light exiting surface 43 into light rays perpendicular to the surface of the liquid crystal panel 1.
  • the deflection prism film group 6 is arranged in a one-dimensional direction by a plurality of parallelogram prism films 61 in a parallelogram prism array, the acute angle ⁇ of the parallelogram prism film 61 is 65°, and the parallelogram prism film 61 includes a second light incident surface 62 and The third light-emitting surface 63, the second light-incident surface 62 is parallel to the second light-emitting surface 43, and the acute angle ⁇ of the parallelogram prism film 61 and the second light-incident surface 62 is on the side of the first light-incident surface 41, and the obtuse angle is close to The intersection of the first light-emitting surface 42 and the second light-emitting surface 43 includes a third light-incident surface 71 and a fourth light-emitting surface 72.
  • the third light-incident surface 71 is parallel to the third light-emitting surface 63, and the fourth light-emitting surface
  • the face 72 is composed of a plurality of juxtaposed serrations 73 having an asymmetrical zigzag shape in a one-dimensional direction, and an angle between the inclined surface of the serrations 73 and the third light incident surface 71 is 10°.
  • 4 is a schematic view showing the working principle of the triangular wedge film 4 of the core component in the present invention.
  • the light of different angles emitted by the light source enters the triangular wedge film 4 and is propagated through the triangular wedge film 4 after multiple times of total reflection, and finally the light in the medium
  • the incident angle is less than or equal to the critical angle of total reflection
  • light is emitted from the second light exit surface 43 of the triangular wedge film 4.
  • the function of the triangular wedge film 4 is to converge the divergent light having a large divergence angle emitted by the light source 2 into a parallel light beam of the triangular wedge film 4 by a parallel reflection of a critical angle close to the total reflection.
  • FIG. 5 (a) shows the angular distribution of the LED light source 2.
  • the divergence angle is about ⁇ 60°.
  • Fig. 6 details the optical path trajectory of a light passing through the triangular wedge film 4 and the parallelogram prism film 61 in the present invention.
  • the working principle of the triangular wedge film 4 is based on the Snell's law of refraction: rijsin ⁇ ⁇ 2
  • ⁇ is the incident angle
  • 3 ⁇ 4 is the refractive index of the medium 2
  • ⁇ is the angle of refraction
  • the light ray 00 emitted from the light source 2 enters the triangular wedge film 4 through the first light incident surface 41 of the triangular wedge film 4 to become the refracted ray 01.
  • the total reflection becomes the reflected light ray 02
  • the reflected light ray 02 is irradiated onto the first light-emitting surface 42 of the triangular wedge-shaped film 4 to be totally reflected again to become the reflected light ray 03.
  • the reflectance curve from light to light is plotted according to Snell's law. It can be seen that if the refractive index of the medium is 1.5, the critical angle of total reflection is about 42°.
  • the second light-emitting surface 43 is emitted to become the light ray 04.
  • FIG. 6 reflects the light ray 04 emitted from the triangular wedge film 4 into a light ray 05 which is approximately perpendicular to the second light-emitting surface 63 of the parallelogram prism film 61.
  • Figure 8 illustrates the optical path trajectory of a single ray in the triangular wedge film 4 and the parallelogram prism film 61.
  • the parallel beam actually emerging from the triangular wedge film 4 has a small divergence angle, as shown in Fig. 8, a beam of light
  • the second light exit surface 43 of the triangular wedge film 4 is irradiated onto the second light incident surface 62 of the parallelogram prism film 61.
  • the light rays 06 and 07 are the two boundary rays of the light, and the light rays 061 are parallel rays with the light 06. It can be seen from the figure that the rays 06 and 07 are not two rays that are completely parallel, but have a small angle. In order to improve the utilization of light and avoid energy loss, it is required that all rays emitted from the triangular wedge film 4 onto the parallelogram prism film 61 satisfy two conditions: (1) All rays entering the parallelogram prism film 61 must pass through a parallelogram The reflecting surface 611 of the prism film 61 is reflected; (2) All the light reflected by the reflecting surface 64 of the parallelogram prism film 61 cannot be incident on the other side reflecting surface 65 of the parallelogram prism film 61.
  • FIG. 8 is a schematic view showing the operation of the collimating prism film 7.
  • the collimating prism film 7 described herein is a transmissive prism which functions to refract a parallel beam from the parallelogram prism film 61 which is approximately perpendicular to the liquid crystal panel 1. A parallel plane beam perpendicular to the liquid crystal panel 1.
  • FIG. 11 is a schematic diagram of the emitted light of the large-angle divergent light emitted by the LED light source 2 simulated by the software according to the backlight module shown in FIG. 3 of the present invention. From the software simulation results, the large-angle divergent light emitted by the light source becomes a parallel beam perpendicular to the liquid crystal panel 1 through the triangular wedge film 4, the reflection film 5, the deflection prism film group 6, and the collimating prism film.
  • Embodiment 2 As shown in FIG. 10, other structures are the same as those in Embodiment 1, except that the deflection prism film group 6 and the collimating prism film 7 are combined to form a deflection collimating prism film 70, and the third light incident surface 71 is formed.
  • the light ray 041 emitted from the triangular wedge film 4 is irradiated onto the deflection collimating prism film 70, and is refracted by the second light incident surface 62 to become the light beam 042.
  • the light beam 042 is reflected by the reflecting surface 701 of the deflection collimating prism film 70 to be converted into light.
  • a novel backlight module for a liquid crystal display includes an LED light source 2, a light source reflector 3, and an optical material for generating a parallel beam, which are sequentially disposed in front of the liquid crystal panel 1.
  • the triangular wedge film 4 including a first light incident surface 41, a light exiting surface 42 and a second light exiting surface 43, the angle ⁇ between the first light exiting surface 42 and the second light emitting surface 43 is 3°, the first light incident surface 41 is opposite to the light source 2, and the reflective film 5 is disposed at the first On the light-emitting surface 42-side, the surface of the reflective film 5 is plated with a medium to form a reflecting surface 51, and the reflecting surface 51 is parallel to the first light-emitting surface 42 for reflecting the light emitted from the first light-emitting surface 42 back to the triangular wedge film 4, and the deflecting prism film
  • the group 6 is arranged in a one-dimensional direction by a plurality of parallelogram prism films 61 in a parallelogram prism array.
  • the acute angle ⁇ of the parallelogram prism film 61 is 55°, and the parallelogram prism film 61 includes a second light incident surface 62 and a third light output. Face 63, second light incident surface 62 and The light-emitting surface 43 is parallel, the acute angle of the parallelogram prism film 61 adjacent to the second light-incident surface 62 is on the side of the first light-incident surface 41, and the obtuse angle ⁇ is close to the intersection of the first light-emitting surface 42 and the second light-emitting surface 43.
  • the straight prism film 8 includes a third light incident surface 81 and a fifth light exit surface 82.
  • the third light incident surface 81 is parallel to the third light exit surface 63.
  • the fifth light exit surface 82 is parallel to the plane of the liquid crystal panel 1, and the third light incident surface.
  • the wedge angle ⁇ between the face 81 and the fifth light exit face 82 is 3°.
  • Embodiment 4 As shown in FIG. 13, a novel backlight module for a liquid crystal display, the other structure is the same as that of the third embodiment, except that the deflection prism film group 6 and the collimating prism film 8 are combined to form a wedge shape.
  • the prism film 80, the third light incident surface 81 and the third light exit surface 63 overlap each other.
  • the parallel beam emitted from the parallelogram prism film 61 still has a certain angle with the normal line of the liquid crystal panel 1, and the collimating prism film 7 needs to be added to further refract the liquid crystal.
  • Screen 1 is a vertical parallel beam.
  • the triangular wedge film 4 can be rotated by a certain angle in advance, and the second light incident surface 63 is parallel to the second light exit surface 43 of the triangular wedge film 4, and thus is emitted from the fifth light exit surface 82.
  • the parallel beam has satisfied the condition perpendicular to the liquid crystal panel 1.
  • the structure of the backlight module described in FIG. 13 has the same function as the backlight module corresponding to FIG. 12 in the present invention.
  • the structure is simpler, and the use of a collimating prism film is eliminated, and the difficulty and cost of processing are greatly reduced.

Landscapes

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

Abstract

本发明提供了一种用于液晶显示器的新型背光模组，特点是包括依次设置在液晶屏前的光源、用于产生平行光束的三角形楔形体、反射器件和偏转准直组件，三角形楔形体包括第一入光面、第一出光面和第二出光面，第一出光面和第二出光面之间的夹角小于等于5°，第一入光面与光源相对，反射器件设置在第一出光面一侧用于将第一出光面出射的光线反射回三角形楔形体，偏转准直组件设置在第二出光面与液晶屏之间，用于将第二出光面出射的平行光束折射成与液晶屏表面垂直的光线，优点在于改善了传统液晶显示器漏光、色偏以及对比度低下的问题，背光模块中各组件的结构简单，制作难度和成本较小，且所产生的平行光束准直性好，光源利用率非常高。

Description

一种用于液晶显示器的新型背光模组 技术领域
本发明涉及一种液晶显示器用的背光模组，尤其是涉及一种用于产生平行面光束的 用于液晶显示器的新型背光模组。
背景技术
从上世纪七十年代开始， 液晶显示器因具有成本低、 分辨率高、 色彩鲜艳等优点被 使用到现在其应用在电子设备中几乎无处不在，从小尺寸的腕表到大尺寸的 TV。发展到 现今的液晶显示器已具有较高的分辨率、 结构紧凑、 高亮度且低成本。 然而， 尽管经过 了四十多年的发展和进步， 液晶显示器由于其使用的背光源不足的限制， 仍存在光源使 用率低、 分辨率低下、 产生色偏等问题。 液晶显示器面板中的液晶本身不具有发光特性， 其利用背光模组提供光源， 达到显 示器显示效果。 通常背光源采用发光二极管（LED)或冷阴极荧光源 （CCFL)作为光源， 光源发出的光经过导光板（LGP)耦合进显示器。但光源的发散角度较大， 实际进入 LGP 被利用的的能量不足 10%， 导致整个显示器的效率降低。 20世纪后发展了很多用于个人 使用的诸如手机、 计算器、 手表等小尺寸液晶显示器， 这些小尺寸的显示器强调轻薄、 结构紧凑、 低功耗。 这些需求对背光源的结构、 光源的发光角度、 光源的使用效率提出 了更高的要求。 大尺寸 TV的发展尤其是 HDTV (高清电视）的发展对显示器的对比度， 画面品质要求 更高。以垂直于液晶（LC)显示屏的法线为轴， LC对来自背光源的近轴的光线利用率高， 因此若背光源的发散角度大， 则光源利用率降低， 且大角度离轴的光线会造成对比度下 降、 漏光、 color washout (色偏） 等问题。 综上所述无论是小尺寸的液晶显示屏， 或是大尺寸的 TV ， 对从背光模组出射的光 通常具有一定的准直性要求。
2000年 10月 10日在美国授权的发明专利 US006130730提出了一种能产生准直光的 背光模组结构， 如图 1所示。 该背光模组 1包括一导光板 10、 一棱镜片 12和一扩散片 14。光自所述入光面 100进入所述导光板 10， 部分光直接从所述出光面 102射出， 部分 光从所述底面 104射出， 而大部分光会在导光板 10内部经过一次或多次的反射并最终 从所述的出光面 102射出所述导光板 10。 所述导光板 10的出光面 102射出的光通过所 述棱镜面 122进入所述棱镜片 12， 其大部分被所述棱镜面 122上的多个棱镜结构 126 将其方向改变为沿着所述顶面 124的法线方向出射， 并向所述扩散片 14方向传播。 所述背光模组 1虽然能提供一种准直光，但所提供的准直光的发散角过大且难以有 效地减小。 当所述反射结构 128的尺寸较大时， 被反射的光的发散角较大， 因此为了减 小出射光的发散角、 提高出射光的准直性， 需要将所述反射结构 128制作的较为精密， 增加了制作工艺的难度和成本。
2008年发表于 PCT的专利 W0 2008/100443 A2提出了一种能产生平行光束的紧凑型 准直反射膜（CCR)， 如图 2所示。 该准直反射膜位于背光模组的最下方， 整体类似于船 型结构， 光源位于该准直反射膜的两端。 准直反射膜包含一个入光面， 该入光面也即是 反光面， 其结构为锯齿形结构。 每一个锯齿设计不同的角度和斜率， 光源发出的不同角 度的光经过不同角度和斜率的锯齿反射， 将其改变方向为垂直于液晶屏的方向出射。 图 2所述的结构虽然也可以产生准直光束，但由于光源发出的光是连续的大角度发 散光， 而准直反射膜的反射膜为不连续的锯齿形结构， 因此所产生的准直光准直效果不 理想。 同时由于不连续的锯齿结构精细， 每一个锯齿都有特定的角度和斜率， 加工难度 非常大， 制作成本很高。 发明内容
本发明所要解决的技术问题是提供一种出射光准直性高、光线利用率高的用于液晶 显示器的新型背光模组。
本发明解决上述技术问题所采用的技术方案为：一种用于液晶显示器的新型背光模 组， 包括依次设置在液晶屏前的光源、 用于产生平行光束的三角形楔形体、 反射器件和 偏转准直组件， 所述的三角形楔形体包括第一入光面、 第一出光面和第二出光面， 所述 的第一出光面和第二出光面之间的夹角小于等于 5 ° ， 所述的第一入光面与所述的光源 相对，所述的反射器件设置在所述的第一出光面一侧用于将所述的第一出光面出射的光 线反射回所述的三角形楔形体，所述的偏转准直组件设置在所述的第二出光面与所述的 液晶屏之间，用于将所述的第二出光面出射的平行光束折射成与所述的液晶屏表面垂直 的光线。
所述的偏转准直组件包括由多个并行排列的平行四边形棱镜构成的偏转棱镜组和 准直棱镜， 所述的偏转棱镜组在一维方向上呈平行四边形阵列， 所述的平行四边形棱镜 的锐角大于等于 45度， 所述的平行四边形棱镜包括第二入光面和第三出光面， 所述的 第二入光面与所述的第二出光面平行，所述的平行四边形棱镜与所述的第二入光面相邻 的锐角在所述的第一入光面一侧，而钝角靠近所述的第一出光面和所述的第二出光面的 交点， 所述的准直棱镜包括第三入光面和第四出光面， 所述的第三入光面与所述的第三 出光面平行， 所述的第四出光面由多个并列的锯齿构成， 在一维方向上呈不对称的锯齿 形， 所述的锯齿的斜面与所述的第三入光面的夹角小于等于 10° 。
所述的偏转棱镜组和所述的准直棱镜可以一体结合构成偏转准直棱镜，所述的第三 入光面与所述的第三出光面相互重合。
所述的偏转准直组件包括由多个并行排列的平行四边形棱镜构成的偏转棱镜组和 准直棱镜， 所述的偏转棱镜组在一维方向上呈平行四边形阵列， 所述的平行四边形棱镜 的锐角大于等于 45度， 所述的平行四边形棱镜包括第二入光面和第三出光面， 所述的 第二入光面与所述的第二出光面平行，所述的平行四边形棱镜与所述的第二入光面相邻 的锐角在所述的第一入光面一侧，而钝角靠近所述的第一出光面和所述的第二出光面的 交点， 所述的准直棱镜包括第三入光面和第五出光面， 所述的第三入光面与所述的第三 出光面平行， 所述的第五出光面平行于所述的液晶屏， 所述的第二入光面与所述的第五 出光面之间的楔角小于等于 10°
所述的偏转棱镜组和所述的准直棱镜还可以一体结合构成楔形棱镜，所述的第三入 光面与所述的第三出光面相互重合。
所述的反射器件为光学材料制成的反射膜，所述的反射膜表面镀有金属或介质构成 反射面， 所述的反射面与所述的第一出光面平行。
所述的三角形楔形体为光学材料制成的三角形楔形膜。
所述的平行四边形棱镜为光学材料制成的平行四边形棱镜膜，所述的准直棱镜为光 学材料制成的准直棱镜膜。
所述的偏转准直棱镜为光学材料制成的偏转准直棱镜膜。
所述的楔形棱镜为光学材料制成的楔形棱镜膜。
与现有技术相比， 本发明的优点在于改善了传统液晶显示器漏光、色偏以及对比度 低下的问题， 背光模块中各组件的结构简单， 制作难度和成本较小， 且所产生的平行光 束准直性好， 光源利用率非常高。
附图说明
图 1为现有技术一种背光模组的横截面结构示意图；
图 2为另一种现有技术背光模组的横截面结构示意图；
图 3为本发明实施例一的背光模组的结构示意图；
图 4为本发明三角形楔形 （膜） 体的工作原理示意图；
图 5 (a)为本发明光源的发光分布图；
图 5 (b)为经过本发明三角形楔形 （膜） 体后的光线角度分布图；
图 6为一条光线经过本发明实施例一的三角形楔形（膜）体和平行四边形棱镜（膜） 的光路轨迹；
图 7为根据斯涅尔定律绘制的从光密到光疏的反射曲线图；
图 8为本发明实施例一的平行四边形棱镜 （膜） 的工作原理示意图；
图 9为本发明实施例一的准直棱镜 （膜） 的工作示意图；
图 10为将实施例一的偏转棱镜 （膜） 组与准直棱镜 （膜）进一步结合构成本发明 实施例二的偏转准直棱镜 （膜） 的结构示意图；
图 11为软件模拟光源发出的光经过本发明背光模组后的出射光束示意图； 图 12为本发明实施例三的结构示意图；
图 13 将实施三的结构进一步简化为本发明实施例四的的背光模组的结构示意图。
具体实施方式
以下结合附图实施例对本发明作进一步详细描述。
实施例一： 如图 3所示， 一种用于液晶显示器的新型背光模组， 包括依次设置在液晶屏 1前的 LED光源 2、光源反射罩 3、用于产生平行光束的光学材料制成的三角形楔形膜 4、 光学材料制成的反射膜 5、 光学材料制成的偏转棱镜膜组 6和光学材料制成的准直棱镜 膜 7， 三角形楔形膜 4包括第一入光面 41、 第一出光面 42和第二出光面 43， 第一出光 面 42和第二出光面 43之间的夹角 0为 5 ° ， 第一入光面 41与光源 2相对， 反射膜 5设 置在第一出光面 42—侧，反射膜 5表面镀有金属构成反射面 51，反射面 51与第一出光 面 42平行， 用于将第一出光面 42出射的光线反射回三角形楔形膜 4， 在第二出光面 43 与液晶屏 1之间依次设置的平行四边形棱镜膜组 6和准直棱镜膜 7构成偏转准直组件， 用于将第二出光面 43出射的平行光束折射成与液晶屏 1表面垂直的光线。 偏转棱镜膜 组 6由多个平行四边形棱镜膜 61在一维方向上排列呈平行四边形棱镜阵列，平行四边形 棱镜膜 61的锐角 α为 65° ， 平行四边形棱镜膜 61包括第二入光面 62和第三出光面 63， 第二入光面 62与第二出光面 43平行，平行四边形棱镜膜 61与第二入光面 62相邻的锐 角 α在第一入光面 41一侧， 而钝角 靠近第一出光面 42和第二出光面 43的交点， 准直 棱镜膜 7包括第三入光面 71和第四出光面 72， 第三入光面 71与第三出光面 63平行， 第四出光面 72由多个并列的锯齿 73构成， 在一维方向上呈不对称的锯齿形， 锯齿 73 的斜面与第三入光面 71的夹角)为 10° 。 图 4是本发明中核心部件三角形楔形膜 4的工作原理示意图，光源发出的不同角度 的光线进入三角形楔形膜 4后经过多次的全反射在三角形楔形膜 4中传播，最后当介质 中光线的入射角小于等于全反射临界角时光线从三角形楔形膜 4的第二出光面 43射出。 该三角形楔形膜 4的作用即为将光源 2发出的具有大发散角的发散光通过多次全反射会 聚成邻近全反射临界角的平行光束射出三角形楔形膜 4。
光线经过三角形楔形膜 4前后的角度分布示意图如图 5 (a)和图 5 (b)所示。 图 5 (a) 中是 LED光源 2的发光角度分布， 发散角约为 ± 60° 左右， 经过三角形楔形膜 4 后被会聚成约 ± 5° 左右的平行光束， 如图 5 (b)所示。 图 6详细阐述了一条光线经过本发明中的三角形楔形膜 4和平行四边形棱镜膜 61 中的光路轨迹。 三角形楔形膜 4的工作原理基于斯涅耳折射定律： rijsin Θ
Figure imgf000007_0001
θ 2
式中 为介质 1的折射率， ^为入射角， ¾为介质 2的折射率， ^为折射角。
从光源 2发出的光线 00通过三角形楔形膜 4的第一入光面 41进入三角形楔形膜 4 变成折射光线 01。 光线 01照射到第二出光面 43上发生全反射变成反射光线 02， 反射 光线 02照射到三角形楔形膜 4的第一出光面 42上再次发生全反射变成反射光线 03。由 图 7根据斯涅耳定律绘制的从光密到光疏的反射率曲线图上可以看出，如果假设介质的 折射率为 1. 5， 全反射临界角大概在 42° 左右。 因此当光线 03照射到第二出光面 43上 时， 若光线 03与法线的夹角 、于或等于全反射临界角， 则通过第二出光面 43出射， 变成光线 04。 从三角形楔形膜 4的第一出光面 43以接近全反射临界角出射的光线 04与液晶屏 1 呈较大的入射角， 不满足液晶屏 1使用的需求， 需要添加偏转准直组件将光线反射成与 液晶屏 1垂直的正入射平行光束。上述图 6中平行四边形棱镜膜 61的反射面 64将从三 角形楔形膜 4中出射的光线 04反射成与平行四边形棱镜膜 61的第二出光面 63近似垂 直的光线 05出射。 图 8讲述的是单条光线在三角形楔形膜 4和平行四边形棱镜膜 61中的光路轨迹， 实际从三角形楔形膜 4中出射的平行光束具有很小的发散角， 如图 8所示， 一束光线从 三角形楔形膜 4的第二出光面 43出来照射到平行四边形棱镜膜 61的第二入光面 62上， 光线 06和 07为这束光线的两条边界光线， 光线 061为与 06的平行光线， 从图可以看 出光线 06和 07不是完全平行的两条光线，而是存在很小的夹角。为提高光线的利用率， 避免能量损失， 要求从三角形楔形膜 4出射照到平行四边形棱镜膜 61上的所有光线满 足两个条件： （1 ) 所有光线进入平行四边形棱镜膜 61后必须经过平行四边形棱镜膜 61 的反射面 611反射； （2 )所有被平行四边形棱镜膜 61的反射面 64反射的光线不能照到 平行四边形棱镜膜 61的另一侧反射面 65上。 从图 8可以看出满足上述两个边界条件的出射光线 10和 11相对平行四边形棱镜膜 61的第三出光面 63的法线有一定的偏转， 因此需要添加准直棱镜膜 7将其折射至法线 方向， 即垂直于液晶屏 1的方向出射。 图 9为准直棱镜膜 7的工作示意图，本文所述的准直棱镜膜 7为一种透射式三棱镜， 其作用是将来自平行四边形棱镜膜 61的近似于垂直于液晶屏 1的平行光束折射成垂直 于液晶屏 1的平行面光束。 图 11是软件模拟的 LED光源 2发出的大角度的发散光经本发明中如图 3所示的背 光模组后的出射光线示意图。 从软件模拟结果看， 光源发出的大角度的发散光经三角 形楔形膜 4、 反射膜 5、 偏转棱镜膜组 6和准直棱镜膜 Ί后变成了垂直于液晶屏 1的平 行光束。 实施例二： 如图 10所示，其它结构与实施例一相同， 不同之处在于偏转棱镜膜组 6 和准直棱镜膜 7—体结合构成偏转准直棱镜膜 70，第三入光面 71与第三出光面 63相互 重合。 从三角形楔形膜 4出射的光线 041照射到偏转准直棱镜膜 70上， 经第二入光面 62 折射后变成光线 042， 光线 042被偏转准直棱镜膜 70的反射面 701反射后成光线 043， 反射光线 043再经该偏转准直棱镜膜 70的第四出光面 72折射后变成与该偏转准直棱镜 膜 70的第二入光面 62垂直的光线 044射出偏转准直棱镜膜 70。 实施例三： 如图 12所示， 一种用于液晶显示器的新型背光模组， 包括依次设置在 液晶屏 1前的 LED光源 2、 光源反射罩 3、 用于产生平行光束的光学材料制成的三角形 楔形膜 4、 光学材料制成的反射膜 5、 光学材料制成的偏转棱镜膜组 6和光学材料制成 的准直棱镜膜 8，三角形楔形膜 4包括第一入光面 41、第一出光面 42和第二出光面 43 , 第一出光面 42和第二出光面 43之间的夹角 Θ为 3 ° ，第一入光面 41与光源 2相对，反 射膜 5设置在第一出光面 42—侧， 反射膜 5表面镀有介质构成反射面 51， 反射面 51 与第一出光面 42平行， 用于将第一出光面 42出射的光线反射回三角形楔形膜 4， 偏转 棱镜膜组 6由多个平行四边形棱镜膜 61在一维方向上排列呈平行四边形棱镜阵列， 平 行四边形棱镜膜 61的锐角 α为 55° ， 平行四边形棱镜膜 61包括第二入光面 62和第三 出光面 63， 第二入光面 62与第二出光面 43平行， 平行四边形棱镜膜 61与第二入光面 62相邻的锐角在第一入光面 41一侧， 而钝角 β靠近第一出光面 42和第二出光面 43的 交点，准直棱镜膜 8包括第三入光面 81和第五出光面 82，第三入光面 81与第三出光面 63平行， 第五出光面 82为平行于液晶屏 1的平面， 第三入光面 81与第五出光面 82之 间的楔角 δ为 3° 。
实施例四： 如图 13所示， 一种用于液晶显示器的新型背光模组， 其它结构与实施 例三相同， 不同之处在于偏转棱镜膜组 6和准直棱镜膜 8—体结合构成楔形棱镜膜 80， 第三入光面 81与第三出光面 63相互重合。
前面图 8介绍过， 采用图 3所示的结构， 从平行四边形棱镜膜 61出射的平行光束 与液晶屏 1的法线仍存在一定夹角， 需要添加准直棱镜膜 7才能进一步折射成与液晶屏 1垂直的平行光束。 而采用图 12和 13所示的结构， 可以预先将三角形楔形膜 4旋转一 定角度，第二入光面 63与三角形楔形膜 4的第二出光面 43平行，因此从第五出光面 82 出射的平行光束已满足垂直于液晶屏 1的条件。
图 13所介绍的背光模组结构，功能与本发明中图 12对应的背光模组结构一样。其 结构更简单， 省去使用准直棱镜膜， 加工制作的难度和成本大大降低。

Claims

权 利 要 求
1、一种用于液晶显示器的新型背光模组，其特征在于包括依次设置在液晶屏前的光 源、 用于产生平行光束的三角形楔形体、 反射器件和偏转准直组件， 所述的三角形楔形 体包括第一入光面、第一出光面和第二出光面， 所述的第一出光面和第二出光面之间的 夹角小于等于 5 ° ， 所述的第一入光面与所述的光源相对， 所述的反射器件设置在所述 的第一出光面一侧用于将所述的第一出光面出射的光线反射回所述的三角形楔形体，所 述的偏转准直组件设置在所述的第二出光面与所述的液晶屏之间，用于将所述的第二出 光面出射的平行光束折射成与所述的液晶屏表面垂直的光线。
2、 如权利要求 1所述的用于液晶显示器的背光模组， 其特征在于所述的偏转准直 组件包括由多个并行排列的平行四边形棱镜构成的偏转棱镜组和准直棱镜，所述的偏转 棱镜组在一维方向上呈平行四边形阵列，所述的平行四边形棱镜的锐角大于等于 45度， 所述的平行四边形棱镜包括第二入光面和第三出光面，所述的第二入光面与所述的第二 出光面平行，所述的平行四边形棱镜与所述的第二入光面相邻的锐角在所述的第一入光 面一侧， 而钝角靠近所述的第一出光面和所述的第二出光面的交点， 所述的准直棱镜包 括第三入光面和第四出光面， 所述的第三入光面与所述的第三出光面平行， 所述的第四 出光面由多个并列的锯齿构成， 在一维方向上呈不对称的锯齿形， 所述的锯齿的斜面与 所述的第三入光面的夹角小于等于 10° 。
3、 如权利要求 2所述的用于液晶显示器的背光模组， 其特征在于所述的偏转棱镜 组和所述的准直棱镜一体结合构成偏转准直棱镜，所述的第三入光面与所述的第三出光 面相互重合。
4、 如权利要求 1所述的用于液晶显示器的背光模组， 其特征在于所述的偏转准直 组件包 由多个并行排列的平行四边形棱镜构成的偏转棱镜组和准直棱镜，所述的偏转 棱镜组在一维方向上呈平行四边形阵列，所述的平行四边形棱镜的锐角大于等于 45度， 所述的平行四边形棱镜包括第二入光面和第三出光面，所述的第二入光面与所述的第二 出光面平行，所述的平行四边形棱镜与所述的第二入光面相邻的锐角在所述的第一入光 面一侧， 而钝角靠近所述的第一出光面和所述的第二出光面的交点， 所述的准直棱镜包 括第三入光面和第五出光面， 所述的第三入光面与所述的第三出光面平行， 所述的第五 出光面平行于所述的液晶屏，所述的第二入光面与所述的第五出光面之间的楔角小于等 于 10°
5、 如权利要求 4所述的用于液晶显示器的背光模组， 其特征在于所述的偏转棱镜 组和所述的准直棱镜一体结合构成楔形棱镜，所述的第三入光面与所述的第三出光面相 互重合。
6、 如权利要求 1~5中任一项权利要求所述的用于液晶显示器的背光模组， 其特征 在于所述的反射器件为光学材料制成的反射膜，所述的反射膜表面镀有金属或介质构成 反射面， 所述的反射面与所述的第一出光面平行。
7、 如权利要求 1~5中任一项权利要求所述的用于液晶显示器的背光模组， 其特征 在于所述的三角形楔形体为光学材料制成的三角形楔形膜。
8、 如权利要求 2或 4所述的用于液晶显示器的背光模组， 其特征在于所述的平行 四边形棱镜为光学材料制成的平行四边形棱镜膜，所述的准直棱镜为光学材料制成的准 直棱镜膜。
9、 如权利要求 3 中任一项权利要求所述的用于液晶显示器的背光模组， 其特征在 于所述的偏转准直棱镜为光学材料制成的偏转准直棱镜膜。
10、如权利要求 5中任一项权利要求所述的用于液晶显示器的背光模组，其特征在 于所述的楔形棱镜为光学材料制成的楔形棱镜膜。
PCT/CN2012/001733 2012-02-08 2012-12-26 一种用于液晶显示器的新型背光模组 WO2013116970A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020147025305A KR20140138158A (ko) 2012-02-08 2012-12-26 액정모니터용 신형 백 라이트 유닛
EP12868306.7A EP2813751A4 (en) 2012-02-08 2012-12-26 NOVEL REFLECTION MODULE FOR LIQUID CRYSTAL DISPLAY
JP2014555910A JP6170072B2 (ja) 2012-02-08 2012-12-26 液晶ディスプレイ用新形バックライトモジュール
US14/454,740 US9715141B2 (en) 2012-02-08 2014-08-08 Backlight module for liquid crystal display

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201210026819.6 2012-02-08
CN201210026819.6A CN102588835B (zh) 2012-02-08 2012-02-08 一种用于液晶显示器的新型背光模组

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US14/454,740 Continuation-In-Part US9715141B2 (en) 2012-02-08 2014-08-08 Backlight module for liquid crystal display

Publications (1)

Publication Number Publication Date
WO2013116970A1 true WO2013116970A1 (zh) 2013-08-15

Family

ID=46477871

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/001733 WO2013116970A1 (zh) 2012-02-08 2012-12-26 一种用于液晶显示器的新型背光模组

Country Status (6)

Country Link
US (1) US9715141B2 (zh)
EP (1) EP2813751A4 (zh)
JP (1) JP6170072B2 (zh)
KR (1) KR20140138158A (zh)
CN (1) CN102588835B (zh)
WO (1) WO2013116970A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110441961A (zh) * 2018-12-20 2019-11-12 友达光电股份有限公司 光学调控元件以及显示装置

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102588835B (zh) * 2012-02-08 2016-01-13 苏州晶智科技有限公司 一种用于液晶显示器的新型背光模组
CN102681049B (zh) 2012-03-12 2014-06-11 京东方科技集团股份有限公司 色偏平衡薄膜、侧入式背光模组及液晶显示装置
CN103226261A (zh) * 2013-03-26 2013-07-31 苏州晶智科技有限公司 一种用于液晶显示器的二维准直背光模组
CN103235446B (zh) * 2013-04-18 2016-04-27 中国科学院苏州纳米技术与纳米仿生研究所 一种用于液晶显示器的背光模组
CN107515467B (zh) * 2017-09-28 2021-01-15 厦门天马微电子有限公司 显示装置
KR102525223B1 (ko) * 2018-02-05 2023-04-25 삼성디스플레이 주식회사 백라이트 유닛 및 이를 포함하는 표시 장치
CN109212660B (zh) * 2018-10-26 2020-01-24 合肥京东方光电科技有限公司 导光组件、光准直组件、背光模组及显示装置
CN111381398B (zh) * 2018-12-29 2023-05-30 北京小米移动软件有限公司 显示模组及电子设备
CN110208983B (zh) * 2019-05-08 2022-02-18 马鞍山晶智科技有限公司 一种侧入式背光模组
CN110032004B (zh) * 2019-05-09 2021-09-07 马鞍山晶智科技有限公司 一种用于准直背光模组的楔形板及准直背光模组

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10253960A (ja) * 1997-03-14 1998-09-25 Enplas Corp サイドライト型面光源装置及び光制御部材
US6130730A (en) 1996-02-14 2000-10-10 Physical Optics Corporation Backlight assembly for a display
TWI234015B (en) * 1999-12-17 2005-06-11 Enplas Corp Light guide plate, surface light source device and liquid crystal display device
US6909480B2 (en) * 2000-10-19 2005-06-21 Daicel Chemical Industries, Ltd. Anisotropic scattering sheet and its use
TWM326642U (en) * 2007-06-15 2008-02-01 Jang Shiou Chin Light guiding plate and liquid crystal display apparatus
WO2008100443A2 (en) 2007-02-09 2008-08-21 Bright View Technologies, Inc. High contrast liquid crystal displays
TW200900801A (en) * 2007-06-29 2009-01-01 Coretronic Corp Backlight module and liquid crystal display having the same
CN101358711A (zh) * 2007-08-01 2009-02-04 奇美电子股份有限公司 光源装置与平面显示器
CN101609230A (zh) * 2008-06-18 2009-12-23 鸿富锦精密工业（深圳）有限公司 背光模组
CN102588835A (zh) * 2012-02-08 2012-07-18 苏州晶智科技有限公司 一种用于液晶显示器的新型背光模组

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH065462B2 (ja) * 1987-07-02 1994-01-19 信越ポリマ−株式会社 バックライト装置
JP3830982B2 (ja) * 1994-03-31 2006-10-11 株式会社エンプラス 楔形出射方向特性調整素子を用いた面光源装置
US5396350A (en) * 1993-11-05 1995-03-07 Alliedsignal Inc. Backlighting apparatus employing an array of microprisms
US5521725A (en) * 1993-11-05 1996-05-28 Alliedsignal Inc. Illumination system employing an array of microprisms
JPH09274184A (ja) * 1996-04-04 1997-10-21 Dainippon Printing Co Ltd レンズフィルムおよびそれを用いた面光源装置
JPH10246805A (ja) * 1997-03-06 1998-09-14 Dainippon Printing Co Ltd 拡散光制御用光学シート、バックライト装置及び液晶表示装置
JP2003015133A (ja) * 2001-04-27 2003-01-15 Citizen Watch Co Ltd 液晶表示装置
TWI258023B (en) * 2001-11-07 2006-07-11 Ibm A prism sheet, a back-light unit using said prism sheet, and a transmission type liquid crystal display device
US20060268418A1 (en) * 2005-05-05 2006-11-30 Kim Jong M Optical films, method of making and method of using
KR100754400B1 (ko) * 2006-04-21 2007-08-31 삼성전자주식회사 백라이트 유닛 및 이를 채용한 디스플레이 장치
JP2007305543A (ja) * 2006-05-15 2007-11-22 Epson Imaging Devices Corp 照明装置、電気光学装置、電子機器及び光学シート
JP2008034240A (ja) * 2006-07-28 2008-02-14 Citizen Electronics Co Ltd バックライト
WO2009002853A2 (en) * 2007-06-22 2008-12-31 3M Innovative Properties Company Systems and methods for controlling backlight output characteristics
EP2365906B1 (en) * 2008-11-19 2016-12-21 3M Innovative Properties Company Reflective film combinations with output confinement in both polar and azimuthal directions and related constructions
CN102121621A (zh) * 2010-01-08 2011-07-13 上海向隆电子科技有限公司 发光装置及使用该发光装置的电子书

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6130730A (en) 1996-02-14 2000-10-10 Physical Optics Corporation Backlight assembly for a display
JPH10253960A (ja) * 1997-03-14 1998-09-25 Enplas Corp サイドライト型面光源装置及び光制御部材
TWI234015B (en) * 1999-12-17 2005-06-11 Enplas Corp Light guide plate, surface light source device and liquid crystal display device
US6909480B2 (en) * 2000-10-19 2005-06-21 Daicel Chemical Industries, Ltd. Anisotropic scattering sheet and its use
WO2008100443A2 (en) 2007-02-09 2008-08-21 Bright View Technologies, Inc. High contrast liquid crystal displays
TWM326642U (en) * 2007-06-15 2008-02-01 Jang Shiou Chin Light guiding plate and liquid crystal display apparatus
TW200900801A (en) * 2007-06-29 2009-01-01 Coretronic Corp Backlight module and liquid crystal display having the same
CN101358711A (zh) * 2007-08-01 2009-02-04 奇美电子股份有限公司 光源装置与平面显示器
CN101609230A (zh) * 2008-06-18 2009-12-23 鸿富锦精密工业（深圳）有限公司 背光模组
CN102588835A (zh) * 2012-02-08 2012-07-18 苏州晶智科技有限公司 一种用于液晶显示器的新型背光模组

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2813751A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110441961A (zh) * 2018-12-20 2019-11-12 友达光电股份有限公司 光学调控元件以及显示装置

Also Published As

Publication number Publication date
EP2813751A4 (en) 2015-10-14
CN102588835B (zh) 2016-01-13
CN102588835A (zh) 2012-07-18
US9715141B2 (en) 2017-07-25
EP2813751A1 (en) 2014-12-17
KR20140138158A (ko) 2014-12-03
JP6170072B2 (ja) 2017-07-26
US20140347602A1 (en) 2014-11-27
JP2015513760A (ja) 2015-05-14

Similar Documents

Publication Publication Date Title
WO2013116970A1 (zh) 一种用于液晶显示器的新型背光模组
JP3059883B2 (ja) 多重反射射光システムを有し、マイクロプリズムを用いるバックライティング用アセンブリ
JP3632208B2 (ja) 照明装置並びにそれらを用いた液晶表示装置及び電子機器
JP4994384B2 (ja) 線形的に低減される発散を有するバックライトユニット
US6671452B2 (en) Luminaire device
KR100840826B1 (ko) 도광판과 이를 구비한 광원 장치 및 표시 장치
US20080089093A1 (en) Backlight unit using particular direct backlight assembly
US8289639B2 (en) Optical films
JPH095739A (ja) 導光シ−ト及びその製造方法、及び前記導光シ−トを用いたバックライト及び前記バックライトを用いた液晶表示装置
TW200408883A (en) Polarized light source system and liquid crystal display using the same
KR19990029518A (ko) 면광원 소자 및 그것을 이용한 표시 장치
TWI378299B (en) Light module with high collimation emitting property
CN103235446B (zh) 一种用于液晶显示器的背光模组
TWI429961B (zh) 光學膜片
CN108873144B (zh) 导光装置、背光模组以及液晶显示器
CN110208895A (zh) 一种用于背光模组的楔形板及其背光模组
CN110032004B (zh) 一种用于准直背光模组的楔形板及准直背光模组
CN210626830U (zh) 一种导光板、背光模组及显示装置
TW201500817A (zh) 曲型背光模組
JPH10333147A (ja) バックライト
TW200422667A (en) Configuration of a light guide of a backlight module with lateral light sources
US20230102740A1 (en) Optical device and display panel
CN110208983B (zh) 一种侧入式背光模组
CN217112967U (zh) 一种准直型背光模组及液晶显示装置
JP2007103322A (ja) 照明装置これが備える光制御部材及びこれを用いた画像表示装置

Legal Events

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

Ref document number: 12868306

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2014555910

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

REEP Request for entry into the european phase

Ref document number: 2012868306

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2012868306

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 20147025305

Country of ref document: KR

Kind code of ref document: A