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
  • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
• • 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
  • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
  • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
• • 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
  • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
  • G02F1/133325—Assembling processes
• • 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
  • G02F2202/00—Materials and properties
  • G02F2202/28—Adhesive materials or arrangements

Definitions

• the present invention relates to an image display device with an improved component assembly method and system.
• LCD panels make use of an external source of light in the form lighting elements in the backlight module to provide the illumination, the latter being typically positioned relative to the LCD panel.
• LCD TV backlight module comprises several components. However, due to different operational material characteristics in different temperature and humidity conditions, a certain gap is needed to be maintained between components to overcome and compensate effects caused by temperature and humidity conditions in long term use.
• US2006088270 discloses an assembly structure of an optical film and a frame.
• the optical film has a body and at least a positioning structure protruding from the edge of the optical film.
• the positioning structure has a sticking part and a neck. The neck is connected between the sticking part and the body.
• the frame is arranged to surround the optical film, and the frame has at least a slot.
• the positioning structure is located within the slot, and a restriction protrusion corresponding to the neck of the positioning structure is formed on the frame at an entrance of the slot, so that the sticking part of the positioning structure is restricted within the slot. Further, the document provides that only the two ends of a fixing tape requires glue to adhere said fixing tape onto the frame.
• US2011157869 discloses backlight module which includes a frame and a first prism film.
• the frame includes sidewall which encloses an inner space.
• the first prism film is disposed within the inner space and has a plurality of prisms on it.
• the prisms are in parallel and adjacent to each other, and the prisms extend along a first extending direction.
• the first prism film has a surrounding edge, which includes a first edge and a second edge.
• a first positioning device is a positioning tape, one end of which is adhered to the first prism film, and the other end of the positioning tape is adhered to the frame.
• a second positioning device is formed by a positioning tape and adhered to the frame and the part of a second prism film.
• the present invention addresses the situation where the optical film and the frame are globally glued, in which case the optical film cannot be prevented from waving due to temperature or humidity, which in turn adversely affects the performance of the backlight module.
• the present invention provides an improved assembling structure without compromising design simplicity and bringing complexity to assembly processes, at the same time achieving a thinner design option.
• the present invention provides an image display device component assembly method and system as provided by the characterizing features defined in Claim 1.
• Primary object of the present invention is to provide an image display device component assembly method and system.
• the invention proposes a system and method for manufacturing an image display device by which a moisture-proof adhesive is applicable on a face of an optically active element such as a diffuser plate or light guide plate innerwise in a central direction around the peripheral line of the optically active element substantially in the vicinity of said peripheral line on said face.
• an optically active element such as a diffuser plate or light guide plate innerwise in a central direction around the peripheral line of the optically active element substantially in the vicinity of said peripheral line on said face.
• Fig. 1 demonstrates a simplified general schematic diagram representation of a diffuser plate or light guide plate on which an optical sheet is placed according to the present invention.
• Fig. 2 demonstrates a simplified general schematic diagram representation of a diffuser plate or light guide plate (optically active element) on which an optical sheet is placed.
• An adhesive strip is provided along an outer peripheral line of the optical sheet prior to its placement such that it is adhesively held in its preconfigured position after placement due to spreading of the adhesive strip between an open cell structure and the optically active element according to the present invention.
• Fig. 3 demonstrates a general schematic sectional view of a direct-type backlight structure according to the present invention.
• Fig. 4 demonstrates a general schematic sectional view of an edge-type backlight structure according to the present invention.
• an image display device with an improved component assembly method and system is provided.
• an LCD TV may involve an edge-type backlight structure with edge-located light sources (7).
• a light guide plate (5) is used to transmit light in optical communication with said light sources (7) in this configuration, a structure together with a reflector sheet (6) is provided.
• a direct-type backlight structure has several light sources (7) situated at the opposite side of the open cell structure (2).
• a reflector sheet (6), a diffusion plate (4) and at least one optical sheet (3) are also conventionally incorporated.
• open cell models have wider compatibility than LCD modules, thanks to which set maker or panel maker manufacturers can incorporate open cell structures (2) into LED-backlight models.
• a moisture-proof adhesive is applied around the light guide plate (5) or diffuser plate (4) as will be delineated in more detail hereinafter.
• the optical sheet (3) is placed relative to said light guide plate (5) or diffuser plate (4) prior to placing the open cell structure (2).
• This configuration will allow the optical sheet (3) to maintain its position during assembling thanks to spreading of adhesive being applied along the peripheral regions of the light guide plate (5) or diffuser plate (4), which provides that said optical sheet (3) will be sandwiched in an airtight manner between the open cell structure (2) and the light guide plate (5) in the case of edge-type backlight structure and between open cell structure (2) and diffuser plate (4) in the case of direct-type backlight structure.
• the optical sheet (3) is secured in the aligned position in a preconfigured manner and its rotation is avoided during assembling in between said open cell structure (2) and the light guide plate (5)/ diffuser plate (4).
• LCD TV components can be assembled in the manner that waving of the optical sheet (13) in the long term can be prevented, which in turn ensures avoiding of performance problems in association with the backlight module.
• the adhesive only applicable along the peripheral region of the light guide plate (5) or diffuser plate (4) serves to the purpose of forming connection bridges simplifying the overall design by eliminating the need to create special gaps, as is practiced in the prior art, to compensate material bending/expanding, thereby allowing a substantially thinner design.
• a moisture resistant adhesive having epoxy resin compounds generally marketed as one component or two component epoxy systems can be used as the preferred adhesive.
• Adhesives of the preferred type are currently available on the market, for instance under the trade name Masterbond.
• the present invention proposes a method for manufacturing an image display device comprising a backlight structure, an open cell structure (2), an optical sheet (3), a reflector sheet (6) and an optically active element in the form of a diffuser plate (4) or a light guide plate (5).
• said method comprises the steps of applying a moisture-proof adhesive on a face of said optically active element internally around the peripheral line thereof substantially in the vicinity of said peripheral line on said face.
• said method comprises the steps of placing the optical sheet (3) relative to said optically active element prior to placing the open cell structure (12).
• the pre-placed position of the optical sheet (13) is maintained in its preconfigured position during spreading of said moisture-proof adhesive by allowing spreading of the same in the direction to said optical sheet (13) at least to reach to the same such that said optical sheet (3) is sandwiched in an airtight manner between said open cell structure (2) and said optically active element.
• said optically active element is a light guide plate (5) or diffuser plate (4).
• said image display device comprises an edge-type backlight structure with edge-located light sources (7) wherein a light guide plate (5) is provided to transmit light in optical communication with said light sources (7).
• said image display device comprises a direct-type backlight structure with a plurality of light sources (7) situated at the opposite side of said open cell structure (2) wherein said diffuser plate (14) is provided to transmit light in optical communication with said light sources (7).
• the present invention provides an improved assembling structure without compromising design simplicity and bringing complexity to assembly processes, at the same time achieving a thinner design option.
• the invention eliminates the need for use of extra material such as additional middle frame or rubber components to ensure long-term alignment.

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

Applications Claiming Priority (1)

Publications (1)

Family

ID=59067637

Family Applications (1)

Country Status (2)

Family Cites Families (6)

• 2017
  • 2017-06-05 EP EP17730424.3A patent/EP3635480A1/de not_active Withdrawn
  • 2017-06-05 WO PCT/EP2017/063618 patent/WO2018224123A1/en not_active Ceased

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