Classifications

• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F13/00—Illuminated signs; Luminous advertising
  • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
  • G09F13/14—Arrangements of reflectors therein
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F13/00—Illuminated signs; Luminous advertising
  • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
  • G09F13/0409—Arrangements for homogeneous illumination of the display surface, e.g. using a layer having a non-uniform transparency
• • 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
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F13/00—Illuminated signs; Luminous advertising
  • G09F13/16—Signs formed of or incorporating reflecting elements or surfaces, e.g. warning signs having triangular or other geometrical shape
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F21/00—Mobile visual advertising
  • G09F21/04—Mobile visual advertising by land vehicles
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F21/00—Mobile visual advertising
  • G09F21/04—Mobile visual advertising by land vehicles
  • G09F21/045—Mobile visual advertising by land vehicles supported by the wheels
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/49002—Electrical device making

Definitions

• the present invention relates to a display device, in particular for a motor vehicle, a backlighting element for a display device, a manufacturing method for manufacturing such a reflective element, and a method for manufacturing a device for a display device. display.
• Display devices are known, for example from Korean patent application no. KR 10 2004 0059605 A. This publication proposes to provide a display device with a backlight. Moreover, a display device is also known from the American publication US 6,179,429 B1.
• a disadvantage of a device according to the prior art is the need to provide a relatively complicated assembly and, therefore, relatively expensive.
• Another disadvantage of such a device according to the prior art is the mounting time which increases according to the number of complementary parts to assemble.
• the present invention is intended in particular to overcome the disadvantages of the known art, and in particular those mentioned above, and also aims to provide a display device that allows a simple and very effective assembly of such a device .
• a display device comprising a display element, the display element being backlit by means of a light source, a backlight element being provided for backlighting of the display element,
• the backlight element comprising a light guide portion ensuring the
• the backlighting element comprising a reflective element part
• the light guide portion of the backlighting element and the reflective element portion being functionally associated with each other
• the reflective element portion and the light guide portion of the backlight element being joined, in the manufacture of the backlight element, to form a single piece.
• the reflective element portion is provided as a non-transparent film, and the light guide portion is formed in an injection molding step with the reflective element portion present in the molding tool.
• the advantage of making the reflective element part in the form of a non-transparent film lies in the fact that it is thus possible to produce the backlight element in its light guide portion by injection molding so as to hold the part reflective element present in the molding tool.
• This way of joining two elements in an injection molding step is also called in English "inmould” or “overmold” process.
• a preferred refinement of the invention is that the reflective element portion is provided as a non-transparent layer applied to a surface of the light guide portion of the backlight element.
• the backlight element comprises a housing element portion providing the housing functionality of the display device and / or the backlighting element.
• the backlight element provides the features not only of light guide and element reflective, but also of case.
• the backlighting element comprises an optical filtering means and / or a light scattering means.
• the display element is a liquid crystal display (LCD), in particular comprising thin film transistors (TFTs).
• LCD liquid crystal display
• TFTs thin film transistors
• the present invention also relates to a backlighting element for use in a display device according to the present invention.
• the present invention also relates to a method of manufacturing a backlighting element for backlighting a display element, the backlighting element comprising a light guide portion providing the
• the backlighting element comprising a reflective element part
• the light guide portion of the backlighting element and the reflective element portion being functionally associated with each other
• the method of manufacturing the backlight element comprising a step of joining the reflective element portion and the light guide portion of the backlight element to form a single piece.
• a preferred refinement of the invention still resides in the fact that the reflective element part is provided as a non-transparent film, and that the step of joining the reflective element part and the light guide part of the retro element illumination comprises the injection molding of the light guide portion with the reflective element portion present in the molding tool.
• the reflective element portion is provided as a non-transparent layer applied to a surface of the light guide portion of the backlight element, and that the step joining the reflective element portion and the light guide portion of the backlighting element comprises applying the non-transparent layer to a surface of the light guide portion of the backlighting element.
• a display device 10 comprising means for performing a backlight.
• the backlighting is achieved using at least three different elements which are to be considered when assembling the display device 10: the display element 20, the light guide 3, and a housing element 4.
• a light source (not shown in the figures) is positioned. With the aid of the light of this light source, the display element 20 is backlit, in particular to increase the contrast of the display element 20.
• To guide the light, and also to distribute (or distribute) more uniformly the intensity of the light, from the light source it is intended to use the light guide 3.
• it can be expected to use a filter to adapt or change the color noticeable light for a user of the display device.
• a display device 10 according to the present invention it is intended to have a backlight element which serves as an integral backlighting element. This is shown in Figures 2 and 3.
• FIG. 2 shows a schematic sectional view of the backlighting element 1 1, according to a first embodiment according to the present invention, which is part of the display device 10.
• FIG. 3 shows a schematic sectional view of the backlighting element 1 1, according to a second embodiment according to the present invention, which is part of the display device 10.
• the backlight element 11 also performs (ie in addition to the aforementioned functionalities) the functionality of the housing element, in particular in a housing element portion 14 of the backlighting element 1 1.
• the display device 1 comprises a display element 20, in particular a liquid crystal display (LCD), and in particular comprising thin film transistors (TFTs).
• LCD liquid crystal display
• TFTs thin film transistors
• the light source or the light source elements are connected via a flexible printed circuit board 14.
• the backlight element 11 is provided in one piece which makes the method of manufacturing the assembly device easier and more efficient.
• the backlight element 11 is made, at least for its light guide portion 13, of a transparent material, at least for the light of the light source of the display device 10.
• the backlighting element 11 is especially provided in a plastic material, in particular PMMA
• PMMA polymethylmethacrylate
• MMA methyl methacrylate
• the backlighting element 11 is made completely of a PMMA (polymethylmethacrylate) material or that the light guide portion 13 of the backlight element 11 is made of a PMMA (polymethacrylate) material. of methyl) and that the housing element portion 14 is made of a non-transparent material, for example ABS (acrylonitrile butadiene styrene).
• PMMA polymethylmethacrylate
• the housing element portion 14 is made of a non-transparent material, for example ABS (acrylonitrile butadiene styrene).
• the backlight element 11 is formed in particular by an injection molding step. At this stage of the manufacturing process of the backlight element 11, according to a first embodiment according to the present invention (shown in FIG. 2), the reflective element part 15 of the element of The backlight 11 is joined to the light guide portion 13 by injection with the reflective element 15 present in the molding tool of the backlighting element 11. This process is called “in-mold” or “in-mold”. over-mold "in English.
• a non-transparent layer in particular a layer in one color, and in particular an ink layer, is applied or deposited on a surface of the light guide portion 13 of the backlighting element 1 1 after the backlight element 11 is formed, in particular by means of an injection molding step.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Theoretical Computer Science (AREA)
• Nonlinear Science (AREA)
• Geometry (AREA)
• Business, Economics & Management (AREA)
• Accounting & Taxation (AREA)
• Marketing (AREA)
• Mathematical Physics (AREA)
• Crystallography & Structural Chemistry (AREA)
• Chemical & Material Sciences (AREA)
• Optics & Photonics (AREA)
• Planar Illumination Modules (AREA)
• Liquid Crystal (AREA)
• Devices For Indicating Variable Information By Combining Individual Elements (AREA)
• Securing Globes, Refractors, Reflectors Or The Like (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=47019232

Family Applications (1)

Country Status (7)

Families Citing this family (2)

Citations (2)

Family Cites Families (25)

• 2011
  • 2011-10-31 FR FR1103311A patent/FR2974639B1/fr not_active Expired - Fee Related
• 2012
  • 2012-04-12 CN CN201280030420.3A patent/CN103797532B/zh not_active Expired - Fee Related
  • 2012-04-12 CN CN201710949474.4A patent/CN108803134A/zh active Pending
  • 2012-04-12 JP JP2014506785A patent/JP2014514610A/ja active Pending
  • 2012-04-12 MX MX2013012485A patent/MX337431B/es active IP Right Grant
  • 2012-04-12 WO PCT/EP2012/001580 patent/WO2012149995A1/fr not_active Ceased
  • 2012-04-12 US US14/114,504 patent/US9368048B2/en active Active
  • 2012-04-12 EP EP12719257.3A patent/EP2705511A1/de not_active Withdrawn
• 2016
  • 2016-05-12 JP JP2016095783A patent/JP2016191922A/ja active Pending

Patent Citations (2)

Non-Patent Citations (1)

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