EP2705511A1 - Dispositif d'affichage et procede de fabrication - Google Patents

Dispositif d'affichage et procede de fabrication

Info

Publication number
EP2705511A1
EP2705511A1 EP12719257.3A EP12719257A EP2705511A1 EP 2705511 A1 EP2705511 A1 EP 2705511A1 EP 12719257 A EP12719257 A EP 12719257A EP 2705511 A1 EP2705511 A1 EP 2705511A1
Authority
EP
European Patent Office
Prior art keywords
backlighting
light guide
display device
backlight
display
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.)
Withdrawn
Application number
EP12719257.3A
Other languages
German (de)
English (en)
French (fr)
Inventor
Benoit Box
Fabrice HENON
Andre Mendiboure
Bernard Guillot
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.)
Johnson Controls Automotive Electronics SAS
Original Assignee
Johnson Controls Automotive Electronics SAS
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 Johnson Controls Automotive Electronics SAS filed Critical Johnson Controls Automotive Electronics SAS
Publication of EP2705511A1 publication Critical patent/EP2705511A1/fr
Withdrawn legal-status Critical Current

Links

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)
  • Marketing (AREA)
  • Accounting & Taxation (AREA)
  • Business, Economics & Management (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (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)
EP12719257.3A 2011-04-30 2012-04-12 Dispositif d'affichage et procede de fabrication Withdrawn EP2705511A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102011100139 2011-04-30
FR1103311A FR2974639B1 (fr) 2011-04-30 2011-10-31 Dispositif d'affichage et procede de fabrication
PCT/EP2012/001580 WO2012149995A1 (fr) 2011-04-30 2012-04-12 Dispositif d'affichage et procede de fabrication

Publications (1)

Publication Number Publication Date
EP2705511A1 true EP2705511A1 (fr) 2014-03-12

Family

ID=47019232

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12719257.3A Withdrawn EP2705511A1 (fr) 2011-04-30 2012-04-12 Dispositif d'affichage et procede de fabrication

Country Status (7)

Country Link
US (1) US9368048B2 (zh)
EP (1) EP2705511A1 (zh)
JP (2) JP2014514610A (zh)
CN (2) CN103797532B (zh)
FR (1) FR2974639B1 (zh)
MX (1) MX337431B (zh)
WO (1) WO2012149995A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110086107A (ko) 2008-10-22 2011-07-27 존슨 컨트롤스 테크놀러지 컴퍼니 디스플레이 장치 및 디스플레이 장치를 제조하기 위한 방법
FR2974639B1 (fr) * 2011-04-30 2016-12-09 Johnson Controls Automotive Electronics Sas Dispositif d'affichage et procede de fabrication

Citations (2)

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US6835440B1 (en) * 1998-12-07 2004-12-28 Nippon Zeon Co., Ltd. Light transmitting plate
US20100283936A1 (en) * 2009-05-06 2010-11-11 Ji Byung-Hwa Liquid crystal display device including LED light source

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JPH08146229A (ja) * 1994-11-16 1996-06-07 Sony Corp 液晶表示装置およびその導光板の製造方法
JP3156836B2 (ja) 1995-12-07 2001-04-16 矢崎総業株式会社 指針式表示装置
US6179429B1 (en) 1998-04-13 2001-01-30 Visteon Global Technologies, Inc. Illuminated instrument cluster dial for an automotive vehicle
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US6685328B1 (en) * 2001-08-27 2004-02-03 Plamone, Inc. Display having planar light guide with integrally formed frame
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FR2974639B1 (fr) * 2011-04-30 2016-12-09 Johnson Controls Automotive Electronics Sas Dispositif d'affichage et procede de fabrication

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US6835440B1 (en) * 1998-12-07 2004-12-28 Nippon Zeon Co., Ltd. Light transmitting plate
US20100283936A1 (en) * 2009-05-06 2010-11-11 Ji Byung-Hwa Liquid crystal display device including LED light source

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See also references of WO2012149995A1 *

Also Published As

Publication number Publication date
CN108803134A (zh) 2018-11-13
US20140168570A1 (en) 2014-06-19
US9368048B2 (en) 2016-06-14
FR2974639B1 (fr) 2016-12-09
CN103797532A (zh) 2014-05-14
MX337431B (es) 2016-03-04
CN103797532B (zh) 2017-10-24
JP2016191922A (ja) 2016-11-10
FR2974639A1 (fr) 2012-11-02
MX2013012485A (es) 2014-06-23
JP2014514610A (ja) 2014-06-19
WO2012149995A1 (fr) 2012-11-08

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