WO2014083692A1 - Display apparatus - Google Patents

Display apparatus Download PDF

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Publication number
WO2014083692A1
WO2014083692A1 PCT/JP2012/081122 JP2012081122W WO2014083692A1 WO 2014083692 A1 WO2014083692 A1 WO 2014083692A1 JP 2012081122 W JP2012081122 W JP 2012081122W WO 2014083692 A1 WO2014083692 A1 WO 2014083692A1
Authority
WO
WIPO (PCT)
Prior art keywords
adhesive sheet
liquid crystal
protective plate
transparent adhesive
crystal display
Prior art date
Application number
PCT/JP2012/081122
Other languages
French (fr)
Japanese (ja)
Inventor
洋己 赤塚
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2014549737A priority Critical patent/JP5686933B2/en
Priority to CN201290001372.0U priority patent/CN204832713U/en
Priority to PCT/JP2012/081122 priority patent/WO2014083692A1/en
Publication of WO2014083692A1 publication Critical patent/WO2014083692A1/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1656—Details related to functional adaptations of the enclosure, e.g. to provide protection against EMI, shock, water, or to host detachable peripherals like a mouse or removable expansions units like PCMCIA cards, or to provide access to internal components for maintenance or to removable storage supports like CDs or DVDs, or to mechanically mount accessories
    • 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
    • G02F1/133331—Cover glasses
    • 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 a display device having a display unit with a protective plate such as a liquid crystal display device.
  • Protective plates are provided on the upper surface of display panels in display devices such as mobile phones and in-vehicle displays for the purpose of protection from external impacts and improvement in design and optical characteristics. Further, this protective plate is subjected to a structure-hidden frame printing on the outer peripheral portion of the display screen of the display panel so that the internal structure cannot be seen from the outside.
  • Patent Document 1 describes a technique for fixing a protective plate and a metal frame as a structure for attaching a protective plate to a display panel.
  • the metal frame is disposed on the outer periphery of the liquid crystal display unit, and the protective plate is bonded and fixed to the transparent substrate of the liquid crystal display unit and the flange portion of the metal frame by a transparent photocurable adhesive.
  • Patent Document 2 discloses an electronic device in which a step portion is provided in an opening portion of a frame body serving as an external housing, and a protective plate is attached to the step portion.
  • a surface film is affixed on the viewing side of the protective plate.
  • a structure-hidden print layer is formed in a portion corresponding to the outer periphery of the display unit, and this print layer has the same function as the frame printing described above.
  • the surface film is fixed to the protective plate and the outer peripheral frame portion by a transparent adhesive layer.
  • Patent Documents 1 and 2 have a structure in which the side end surface of the transparent adhesive layer is exposed on the outer periphery of the device casing. Therefore, there is a problem that display light such as a backlight of the liquid crystal display unit leaks from the side end surface through the inside of the adhesive layer and is visible from the outer periphery of the device casing. In particular, as the thickness of the adhesive layer increases, the amount of light leaking from the outer periphery increases.
  • the present invention has been made to solve the above-described problems, and an object thereof is to obtain a display device capable of preventing leakage of light generated inside the device to the outside.
  • the display device includes a case that is open on one side and that houses an illumination light source unit including a light guide, a first flange that projects inwardly to the periphery of the frame opening, and the periphery of the frame opening.
  • the protective plate has a size corresponding to the entire rear surface side of the protective plate including the protective plate display area to the surrounding printing area, and the rear surface side is the entire display surface side of the liquid crystal display panel and the second side.
  • Adhering to the flange, surface There comprises a transparent adhesive sheet member adhered to the back surface side of the protective plate, provided opposite to the side end surface of at least a transparent adhesive sheet member, and a light shielding portion for shielding light from the side end face of the transparent adhesive sheet member.
  • FIG. 3 is a cross-sectional view illustrating a configuration of a display device according to Embodiment 1.
  • FIG. 4 is a cross-sectional view illustrating a configuration including a touch panel of the display device according to Embodiment 1.
  • FIG. It is sectional drawing which shows the structure of the display apparatus which concerns on Embodiment 2 of this invention. It is sectional drawing which shows the structure of the display apparatus which concerns on Embodiment 3 of this invention.
  • FIG. 1 is a front view showing a display device having a display unit with a protective plate.
  • the display device 1 shown in FIG. 1 includes a mobile terminal having a display unit such as a mobile phone, a smartphone, or a PND (Portable Navigation Device), an in-vehicle audio device having a display, or an integrated audio / navigation machine. It can be a display device such as an in-vehicle information device.
  • a protective plate 3 for protecting the liquid crystal display panel is attached to the display surface side case 2 of the display device 1.
  • the protective plate 3 is formed with a display area 3a corresponding to the display screen and a print area 3b formed by performing non-translucent printing on the back surface around the display area 3a.
  • FIG. 2 is an exploded perspective view showing a configuration of a conventional display device, and schematically shows a conventional configuration of the display device as shown in FIG.
  • the conventional display device 100 light leakage from the periphery of the protective plate 102 is achieved by bonding and fixing the non-transparent print region 102b of the protective plate 102 to the display surface side case 101 with a non-transparent adhesive member 102c. It has the structure which aimed at reduction.
  • the display surface side case 101, the protective plate 102, the liquid crystal display panel 103, the backlight holding frame 104, the illumination light source unit 105 including the light guide plate, the backlight holding case 106, and A back side case 107 is provided.
  • the display surface side case 101 is a frame-shaped design housing that constitutes the display surface side housing of the display device 100, and a protective plate 102 to be attached to the display surface side of the liquid crystal display panel 103 is disposed.
  • the display surface side case 101 and the back surface side case 107 serve as a casing main body of the display device 100.
  • the protection plate 102 is a plate-like member that is made of a transparent material and protects the display surface of the liquid crystal display panel 105 from the outside.
  • the periphery of the display area 102 a is a print area 102 b formed by applying a frame-like back surface printing with a non-translucent color (for example, black).
  • the protective plate 102 is bonded and fixed to a flange portion 101a projecting inwardly at the periphery of the opening of the display surface side case 101 by a non-light-transmitting adhesive member 102c provided in a frame shape.
  • the liquid crystal display panel 103 includes a liquid crystal layer sandwiched between transparent substrates on the display surface side and the back surface side, an electrode structure that applies an electric field to the liquid crystal layer, a color filter, a polarizing plate, and the like. Backlight is irradiated from the back side to display an image.
  • the liquid crystal display panel 103 has a display surface side attached to the protective plate 102 via a transparent adhesive sheet 103 a and an outer peripheral portion on the back surface side bonded and fixed to the flange portion 104 a of the backlight holding frame 104.
  • the transparent adhesive sheet 103 a is a transparent adhesive sheet member having substantially the same size as the display area 102 a of the protective plate 102, and bonds only the display surface side of the liquid crystal display panel 103 and the back surface side of the protective plate 102.
  • the backlight holding frame 104 is a frame member in which a flange portion 104a projecting inward is formed at the periphery of the frame opening.
  • the illumination light source unit 105 includes a backlight light source such as an LED and a light guide plate, and irradiates light emitted from the backlight light source to the back surface of the liquid crystal display panel 103 as diffused light by the light guide plate.
  • the backlight holding case 106 is a box-shaped case that is open on one side, and houses the illumination light source unit 105. By attaching the backlight holding frame 104 to the opening of the backlight holding case 106, the illumination light source unit 105 is accommodated between the flange portion 104 a and the backlight holding case 106.
  • FIG. 3 is a cross-sectional view showing the configuration of a conventional display device, and shows a cross-section in the direction of the arrow taken along the line AA in FIG.
  • a liquid crystal display panel 103 to which a protective plate 102 is attached with a transparent adhesive sheet 103 a is disposed on the display surface side of a housing body including a display surface side case 101 and a back surface side case 107.
  • a holding housing including a backlight holding frame 104 that houses the illumination light source unit 105 and a backlight holding case 106 is disposed.
  • the outer peripheral area (printing area 102b) on the back surface side of the liquid crystal display panel 103 is bonded and fixed to the flange portion 101a of the display surface side case 101 by a non-light-transmitting adhesive member 102c such as a fixing tape.
  • the display device 100 is configured such that the non-transparent print region 102 b of the protective plate 102 is bonded and fixed to the display surface side case 101 with a non-transparent adhesive member 102 c.
  • the light leakage from the surroundings is reduced. That is, in this configuration, it is necessary to provide the non-light-transmitting adhesive member 102c in a frame shape along the print region 102c.
  • forming the frame-shaped adhesive member 102c requires high processing accuracy. For this reason, it leads to an increase in apparatus cost and it is difficult to adopt the shape.
  • region 102b region 102b
  • a frame formed with a flange portion that holds the outer peripheral portion of the protective plate from the back side is used, and further, instead of the adhesive member 102c and the transparent adhesive sheet 103a.
  • the light shielding part which shields the light from the inside is provided facing the side end face of the transparent adhesive sheet.
  • FIG. 4 is an exploded perspective view showing the configuration of the display device according to the first embodiment of the present invention, and schematically shows the configuration of the display device according to the first embodiment.
  • FIG. 5 is a cross-sectional view showing the display device according to the first embodiment, and shows a cross-section in the direction of the arrow taken along the line AA in FIG.
  • the display device 1 includes a display surface side case 2, a liquid crystal display panel 4, a mold frame 5, an illumination light source unit 6, a backlight holding case 7, and a back side case 8.
  • the mold frame 5 is a frame that holds the illumination light source unit 6 in a non-translucent color (for example, black), a flange unit 5a that is a first flange unit for mounting the liquid crystal display panel 4, and a frame opening. And a flange portion 5b which is a second flange portion projecting outward from the peripheral edge.
  • a non-translucent color for example, black
  • a flange portion 5b which is a second flange portion projecting outward from the peripheral edge.
  • the mold frame 5 has a flange portion 5b that protrudes outward along the printing region 3b of the protective plate 3 to the periphery of the frame opening.
  • the protective plate 3 is held by the flange portion 5b.
  • the liquid crystal display panel 103 is held by the backlight holding frame 104
  • the protective plate 102 is held by the display surface side case 101, which is a separate member from the backlight holding frame 104. is doing.
  • the display surface side case 101 which is a separate member from the backlight holding frame 104.
  • the protective plate 3 is also held by the mold frame 5 that holds the liquid crystal display panel 4, it is easy to ensure flatness, and the transparent adhesive sheet 4a having the same size as the protective plate 3 is used. can do. Thereby, it is not necessary to form the adhesive member in a frame shape or to attach the fixing tape. Therefore, the manufacturing is easy and the product cost can be reduced.
  • the entire back side of the protective plate 3 is bonded with the transparent adhesive sheet 4a, even when the protective plate 3 is cracked, the fragments remain attached to the transparent adhesive sheet 4a, thus preventing scattering of the fragments. it can. Further, since the outer peripheral portion of the protective plate 3 and the flange portion 5b are attached, it is possible to prevent dust entering from the gap between the printing region 3b of the protective plate 3 and the display surface side case 2 from flowing into the liquid crystal display panel 4 side. Is possible.
  • the transparent adhesive sheet 4a having substantially the same size as the entire back surface of the protective plate 3 has no portion that blocks light inside the transparent adhesive sheet 4a. For this reason, the light from the illumination light source part 6 may leak outside from the side end surface of the transparent adhesive sheet 4a. Therefore, in the present invention, a light shielding portion that blocks light leakage is provided opposite to the side end face of the transparent adhesive sheet 4a.
  • the light shielding portion is a standing wall portion 5 c erected from the flange portion 5 b toward the protection plate 3. With this configuration, it is possible to prevent leakage of light generated inside the display device 1 to the outside with an inexpensive and simple configuration.
  • the height of the standing wall 5c is set as close as possible to the back surface of the protective plate 3 as shown in FIG.
  • the height of the transparent adhesive sheet 4a is substantially the same as the height of the transparent adhesive sheet 4a, and when the protective plate 3 is bonded to the transparent adhesive sheet 4a, the upper end surface of the standing wall 5c is brought into contact with the printing region 3b.
  • the protective plate 3 is shielded by the non-transparent printing region 3b formed at each end portion, light leakage from the side end surface is weak. Therefore, as shown in FIG. 5, in a state where the structure composed of the mold frame 5 containing the protective plate 3 and the liquid crystal display panel 4 and the backlight holding case 7 is received in the opening portion of the display surface side case 2, By configuring the inner surface of the display surface side case 2 so as to face the side end surface of the protection plate 3, light leakage from the side end surface of the protection plate 3 can be sufficiently prevented.
  • the display surface side case 2 is a frame-shaped design housing that constitutes a housing on the display surface side of the display device 1. Unlike the structure shown in FIGS. 2 and 3, the display surface side case 2 according to the present invention has a structure composed of a mold frame 5 containing a protective plate 3 and a liquid crystal display panel 4 and a backlight holding case 7. Hold. More specifically, as shown in FIG. 5, the rear surface side of the flange portion 5 b of the mold frame 5 is held by the flange portion 2 a projecting inwardly at the periphery of the opening of the display surface side case 2. For example, it is bonded and fixed using an adhesive member. The display surface side case 2 is assembled to the back surface side case 8 as shown in FIG.
  • FIG. 6 is a cross-sectional view illustrating a configuration including the touch panel of the display device according to the first embodiment.
  • the liquid crystal display panel 4 includes a touch panel 9 on the display surface, and the transparent adhesive sheet 4 a adheres the front surface side of the touch panel 9 on the back surface side.
  • the touch panel 9 and the liquid crystal display panel 4 are bonded and fixed with a translucent adhesive member 4b as shown in FIG.
  • the display device 1A can be provided with a touch operation function. Since the amount of light leakage at the side end surface tends to increase as the number of parts to be bonded with the translucent adhesive member increases, the standing wall 5c is provided even in the configuration with the touch panel 9 interposed. As a result, the amount of light leakage can be reduced.
  • the backlight holding case 7 that houses the illumination light source unit 6 including the light guide, and the inward projecting to the periphery of the frame opening. It has a flange portion 5b and a flange portion 5b projecting outward from the periphery of the frame opening, and is attached to the opening portion of the backlight holding case 7 so as to illuminate between the flange portion 5a and the backlight holding case 7.
  • a mold frame 5 that accommodates the portion 6, a liquid crystal display panel 4 that is illuminated from the back side with the light of the illumination light source portion 6, and a transparent plate-like member that protects the front side of the liquid crystal display panel 4.
  • the protective plate 3 including a protective plate 3 in which non-transparent printing is performed in a region corresponding to the periphery of the display region of the display panel 4, and the display region 3a of the protective plate 3 to the print region 3b around the protective plate 3
  • a transparent adhesive sheet 4a having a size corresponding to the surface, the back side being bonded to the entire display surface side of the liquid crystal display panel 4 and the flange portion 5b, and the front side being bonded to the back side of the protective plate 3, and at least transparent adhesive
  • a standing wall portion 5c is provided opposite to the side end surface of the sheet 4a and shields light from the side end surface of the transparent adhesive sheet 4a.
  • produced inside the display apparatus 1 can prevent the light leakage from the side end surface of the transparent adhesive sheet 4a.
  • the transparent adhesive sheet 4a whose size is larger than that of the conventional one, the adhesion area of the protective plate 3 is secured, and the holding power can be improved.
  • the transparent adhesive sheet 4a is adhered to almost the entire back surface of the protective plate 3, even if the protective plate 3 is broken, the fragments are not scattered.
  • the display device 1A can have a touch operation function.
  • the light-shielding part was the standing wall part 5c
  • a non-translucent adhesive tape is attached to the side end surface of the flange portion 5b so as to face the side end surface of the transparent adhesive sheet 4a. Also good.
  • FIG. FIG. 7 is a cross-sectional view showing the configuration of the display device according to the second embodiment of the present invention, and shows a cross section in the direction of the arrow taken along the line AA in FIG. 1 along the display device 1B according to the second embodiment. Show. As shown in FIG. 7, in the display device 1B, the standing wall portion 5c-1 erected from the flange portion 5b of the mold frame 5A is opposed to the side end surface of the transparent adhesive sheet 4a and the side end surface of the protection plate 3, respectively. ing. Thus, by making it the shape which covers both side end surfaces, the light-shielding effect can be improved markedly.
  • the second embodiment can also be adopted in a configuration in which a touch panel 9 is interposed as in FIG.
  • the width of the printing region 3b of the protective plate 3 is made as small as possible from the viewpoint of improving the design.
  • the light inside the apparatus is not completely shielded in the printing region 3 b and may leak from the side end face of the protection plate 3. Therefore, for such a display device, the above-described light leakage can be reduced by providing the standing wall portions 5c-1 facing the side end surface of the transparent adhesive sheet 4a and the side end surface of the protective plate 3, respectively.
  • the standing wall portion 5c-1 faces the side end surface of the transparent adhesive sheet 4a and the side end surface of the protective plate 3, so that it is compared with the configuration of the first embodiment.
  • the light shielding effect can be improved.
  • FIG. FIG. 8 is a cross-sectional view showing the configuration of the display device according to Embodiment 3 of the present invention, and shows a cross-section in the arrow direction taken along line AA in FIG. 1 along the display device 1C according to Embodiment 3.
  • the display surface side case 2 ⁇ / b> A shown in FIG. 8 has an opening penetrating the front and back, and the mold frame 5 that houses the protective plate 3 and the liquid crystal display panel 4 together with the backlight holding case 7 is on the front side. It is the design housing
  • the flange portion 5b of the mold frame 5B is not provided with a standing wall portion, and the light shielding portion is constituted by the step portion 2A-1.
  • the stepped portion 2A-1 is a stepped portion that protrudes inward from the periphery of the opening on the surface side of the display surface side case 2A, and the wall surface portion faces the side end surface of the transparent adhesive sheet 4a.
  • the light shielding effect can be improved by bringing the step surface 2A-2 of the step portion 2A-1 as close as possible to the back surface of the protective plate 3 as shown in FIG.
  • the stepped surface 2A-2 comes into contact with the printing region 3b.
  • the mold frame 5 having the opening portion penetrating the front and back and housing the protective plate 3 and the liquid crystal display panel 4 together with the backlight holding case 7 is provided on the front side.
  • any combination of each embodiment, any component of each embodiment can be modified, or any component can be omitted in each embodiment. .
  • the display device according to the present invention can prevent leakage of light generated inside the device to the outside, and thus is suitable for a vehicle-mounted display device in which leakage light may be conspicuous like a passenger compartment at night. .
  • 1, 1A to 1C 100 display device, 2, 2A, 101 display surface side case, 2a, 5a, 5b, 101a flange portion, 2A-1 step portion, 2A-2 step surface, 3,102 protective plate, 3a, 102a display area, 3b, 102b printing area, 4,103 liquid crystal display panel, 4a, 103a transparent adhesive sheet, 4b translucent adhesive member, 5, 5A, 5B mold frame, 5c, 5c-1 standing wall, 6 , 105 Illumination light source part, 7, 106 Backlight holding case, 8, 107 Back side case, 9 Touch panel, 102c Non-translucent adhesive member, 104 Backlight holding frame.

Abstract

This display apparatus is provided with: a transparent adhesive sheet (4a), which has a size equivalent to the whole rear surface of a protection board (3), and which has the rear surface thereof adhered to the whole display surface-side surface of a liquid crystal display panel (4), and to a flange section (5b) of a mold frame (5), and the front surface thereof adhered to the rear surface of the protection board (3); and an upright wall section (5c), which is provided to face the side end surface of the transparent adhesive sheet (4a), and which blocks leakage of light from the inside through the transparent adhesive sheet (4a).

Description

表示装置Display device
　この発明は、液晶表示装置などの保護板付きの表示部を有した表示装置に関する。 The present invention relates to a display device having a display unit with a protective plate such as a liquid crystal display device.
　携帯電話、車載ディスプレイなどの表示装置には、外部衝撃からの保護、意匠性および光学特性の向上を目的として、表示パネルの上面に保護板が設けられている。また、この保護板には、表示パネルの表示画面の外周部分に内部構造が外部から視認できないようにするための構造隠しの枠印刷が施される。 Protective plates are provided on the upper surface of display panels in display devices such as mobile phones and in-vehicle displays for the purpose of protection from external impacts and improvement in design and optical characteristics. Further, this protective plate is subjected to a structure-hidden frame printing on the outer peripheral portion of the display screen of the display panel so that the internal structure cannot be seen from the outside.
　表示パネルへの保護板の取り付け構造としては、例えば特許文献１に保護板と金属枠を固着させる技術が記載されている。この金属枠は、液晶表示部の外周に配設されており、保護板は、透明な光硬化型接着剤によって液晶表示部の透明基板と金属枠のフランジ部分に接着固定される。 For example, Patent Document 1 describes a technique for fixing a protective plate and a metal frame as a structure for attaching a protective plate to a display panel. The metal frame is disposed on the outer periphery of the liquid crystal display unit, and the protective plate is bonded and fixed to the transparent substrate of the liquid crystal display unit and the flange portion of the metal frame by a transparent photocurable adhesive.
　また、特許文献２には、外部筐体となる枠体の開口部分に段差部を設け、この段差部に保護板を貼り付ける電子機器が開示されている。この電子機器においては、保護板の視認側に表面フィルムが貼り付けられる。表面フィルムの裏面には、表示部の外周に相当する部分に構造隠しの印刷層が形成されており、この印刷層は、上述した枠印刷と同様な機能を有している。なお、表面フィルムは、透明な粘着層により保護板およびその外周の枠体部分に固着される。 Further, Patent Document 2 discloses an electronic device in which a step portion is provided in an opening portion of a frame body serving as an external housing, and a protective plate is attached to the step portion. In this electronic device, a surface film is affixed on the viewing side of the protective plate. On the back surface of the surface film, a structure-hidden print layer is formed in a portion corresponding to the outer periphery of the display unit, and this print layer has the same function as the frame printing described above. The surface film is fixed to the protective plate and the outer peripheral frame portion by a transparent adhesive layer.
特開２００９－８７０３号公報JP 2009-8703 A 特開２００９－０６９３３３号公報JP 2009-069333 A
　特許文献１，２に代表される従来の技術では、透明な接着層の側端面が機器筐体の外周に剥き出した構造である。このため、液晶表示部のバックライトなどの表示用の光が接着層の内部を通って側端面から光漏れして機器筐体の外周から視認されるという課題があった。特に、接着層の厚みが増すほど、外周から漏れ出る光量が多くなる。 The conventional techniques represented by Patent Documents 1 and 2 have a structure in which the side end surface of the transparent adhesive layer is exposed on the outer periphery of the device casing. Therefore, there is a problem that display light such as a backlight of the liquid crystal display unit leaks from the side end surface through the inside of the adhesive layer and is visible from the outer periphery of the device casing. In particular, as the thickness of the adhesive layer increases, the amount of light leaking from the outer periphery increases.
　この発明は、上記のような課題を解決するためになされたもので、装置内部で発生した光の外部への漏れを防ぐことができる表示装置を得ることを目的とする。 The present invention has been made to solve the above-described problems, and an object thereof is to obtain a display device capable of preventing leakage of light generated inside the device to the outside.
　この発明に係る表示装置は、一面が開口し、導光体を含んだ照明光源部を収納するケースと、フレーム開口の周縁に内向きに張り出した第１のフランジ部とフレーム開口の周縁から外向きに張り出した第２のフランジ部を有し、ケースの開口部に取り付けられて第１のフランジ部とケースとの間で照明光源部を収容するフレームと、照明光源部の光で裏面側から照明される液晶表示パネルと、液晶表示パネルの表面側を保護する透明な板状部材であって、当該液晶表示パネルの表示領域の周囲に対応する領域に非透光性の印刷が施された保護板と、保護板の表示領域からその周囲にある印刷領域までを含む当該保護板の裏面側全面に相当するサイズを有しており、裏面側が液晶表示パネルの表示面側全面と第２のフランジ部に接着し、表面側が保護板の裏面側に接着する透明粘着シート部材と、少なくとも透明粘着シート部材の側端面に対向して設けられ、当該透明粘着シート部材の側端面からの光を遮光する遮光部とを備える。 The display device according to the present invention includes a case that is open on one side and that houses an illumination light source unit including a light guide, a first flange that projects inwardly to the periphery of the frame opening, and the periphery of the frame opening. A second flange portion projecting in the direction, a frame that is attached to the opening of the case and accommodates the illumination light source portion between the first flange portion and the case, and light from the illumination light source portion from the back side A liquid crystal display panel to be illuminated and a transparent plate-like member that protects the surface side of the liquid crystal display panel, and non-transparent printing is applied to a region corresponding to the periphery of the display region of the liquid crystal display panel The protective plate has a size corresponding to the entire rear surface side of the protective plate including the protective plate display area to the surrounding printing area, and the rear surface side is the entire display surface side of the liquid crystal display panel and the second side. Adhering to the flange, surface There comprises a transparent adhesive sheet member adhered to the back surface side of the protective plate, provided opposite to the side end surface of at least a transparent adhesive sheet member, and a light shielding portion for shielding light from the side end face of the transparent adhesive sheet member.
　この発明によれば、装置内部で発生した光の外部への漏れを防ぐことができるという効果がある。 According to the present invention, there is an effect that light generated inside the apparatus can be prevented from leaking to the outside.
保護板付きの表示部を有する表示装置を示す正面図である。It is a front view which shows the display apparatus which has a display part with a protective plate. 従来の表示装置の構成を示す分解斜視図である。It is a disassembled perspective view which shows the structure of the conventional display apparatus. 従来の表示装置の構成を示す断面図である。It is sectional drawing which shows the structure of the conventional display apparatus. この発明の実施の形態１に係る表示装置の構成を示す分解斜視図である。It is a disassembled perspective view which shows the structure of the display apparatus which concerns on Embodiment 1 of this invention. 実施の形態１に係る表示装置の構成を示す断面図である。3 is a cross-sectional view illustrating a configuration of a display device according to Embodiment 1. FIG. 実施の形態１に係る表示装置のタッチパネルを備えた構成を示す断面図である。4 is a cross-sectional view illustrating a configuration including a touch panel of the display device according to Embodiment 1. FIG. この発明の実施の形態２に係る表示装置の構成を示す断面図である。It is sectional drawing which shows the structure of the display apparatus which concerns on Embodiment 2 of this invention. この発明の実施の形態３に係る表示装置の構成を示す断面図である。It is sectional drawing which shows the structure of the display apparatus which concerns on Embodiment 3 of this invention.
　以下、この発明をより詳細に説明するため、この発明を実施するための形態について、添付の図面に従って説明する。
実施の形態１．
　図１は、保護板付きの表示部を有する表示装置を示す正面図である。図１に示す表示装置１は、携帯電話、スマートフォンあるいはＰＮＤ（Ｐｏｒｔａｂｌｅ　Ｎａｖｉｇａｔｉｏｎ　Ｄｅｖｉｃｅ）などの表示部を有する携帯端末、ディスプレイを有した車載用のオーディオ装置、または、オーディオとナビゲーションの一体型機を含む車載用情報機器などの表示装置となり得る。表示装置１の表示面側ケース２には、液晶表示パネルを保護するための保護板３が取り付けられる。保護板３には、表示画面に対応する表示領域３ａと、表示領域３ａの周囲の裏面に非透光性の印刷を施してなる印刷領域３ｂが形成されている。 Hereinafter, in order to describe the present invention in more detail, modes for carrying out the present invention will be described with reference to the accompanying drawings.
Embodiment 1 FIG.
FIG. 1 is a front view showing a display device having a display unit with a protective plate. The display device 1 shown in FIG. 1 includes a mobile terminal having a display unit such as a mobile phone, a smartphone, or a PND (Portable Navigation Device), an in-vehicle audio device having a display, or an integrated audio / navigation machine. It can be a display device such as an in-vehicle information device. A protective plate 3 for protecting the liquid crystal display panel is attached to the display surface side case 2 of the display device 1. The protective plate 3 is formed with a display area 3a corresponding to the display screen and a print area 3b formed by performing non-translucent printing on the back surface around the display area 3a.
　図２は、従来の表示装置の構成を示す分解斜視図であり、図１に示したような表示装置の従来の構成を概略的に示している。従来の表示装置１００は、保護板１０２の非透光性の印刷領域１０２ｂを、非透光色の粘着部材１０２ｃで表示面側ケース１０１に接着固定することで、保護板１０２周囲からの光漏れの低減を図った構成を有している。
　その構成としては、図２に示すように、表示面側ケース１０１、保護板１０２、液晶表示パネル１０３、バックライト保持用フレーム１０４、導光板を含む照明光源部１０５、バックライト保持用ケース１０６および裏面側ケース１０７を備える。 FIG. 2 is an exploded perspective view showing a configuration of a conventional display device, and schematically shows a conventional configuration of the display device as shown in FIG. In the conventional display device 100, light leakage from the periphery of the protective plate 102 is achieved by bonding and fixing the non-transparent print region 102b of the protective plate 102 to the display surface side case 101 with a non-transparent adhesive member 102c. It has the structure which aimed at reduction.
As shown in FIG. 2, the display surface side case 101, the protective plate 102, the liquid crystal display panel 103, the backlight holding frame 104, the illumination light source unit 105 including the light guide plate, the backlight holding case 106, and A back side case 107 is provided.
　表示面側ケース１０１は、表示装置１００の表示面側の筐体を構成するフレーム形状の意匠筐体であり、液晶表示パネル１０３の表示面側に取り付ける保護板１０２が配置されている。この表示面側ケース１０１および裏面側ケース１０７が、表示装置１００の筐体本体となる。 The display surface side case 101 is a frame-shaped design housing that constitutes the display surface side housing of the display device 100, and a protective plate 102 to be attached to the display surface side of the liquid crystal display panel 103 is disposed. The display surface side case 101 and the back surface side case 107 serve as a casing main body of the display device 100.
　保護板１０２は、透明材料で形成され、液晶表示パネル１０５の表示面を外部から保護する板状部材である。保護板１０２において、表示領域１０２ａの周囲は、非透光色（例えば、黒色）で枠状の裏面印刷を施してなる印刷領域１０２ｂとなっている。
　従来では、保護板１０２は、表示面側ケース１０１の開口部の周縁に内向きに張り出したフランジ部１０１ａに、枠形状に設けた非透光色の粘着部材１０２ｃによって接着固定される。 The protection plate 102 is a plate-like member that is made of a transparent material and protects the display surface of the liquid crystal display panel 105 from the outside. In the protective plate 102, the periphery of the display area 102 a is a print area 102 b formed by applying a frame-like back surface printing with a non-translucent color (for example, black).
Conventionally, the protective plate 102 is bonded and fixed to a flange portion 101a projecting inwardly at the periphery of the opening of the display surface side case 101 by a non-light-transmitting adhesive member 102c provided in a frame shape.
　液晶表示パネル１０３は、表示面側と裏面側の透明基板で狭持された液晶層、液晶層に電界を印加する電極構造、カラーフィルタ、偏光板などで構成されており、照明光源部１０５のバックライト光が裏面側から照射されて画像を表示する。
　また、液晶表示パネル１０３は、表示面側が透明粘着シート１０３ａを介して保護板１０２に貼り付けられ、裏面側の外周部がバックライト保持用フレーム１０４のフランジ部１０４ａに接着固定されている。
　なお、透明粘着シート１０３ａは、保護板１０２の表示領域１０２ａと略同一なサイズを有した透明粘着シート部材であり、液晶表示パネル１０３の表示面側と保護板１０２の裏面側のみを接着する。 The liquid crystal display panel 103 includes a liquid crystal layer sandwiched between transparent substrates on the display surface side and the back surface side, an electrode structure that applies an electric field to the liquid crystal layer, a color filter, a polarizing plate, and the like. Backlight is irradiated from the back side to display an image.
The liquid crystal display panel 103 has a display surface side attached to the protective plate 102 via a transparent adhesive sheet 103 a and an outer peripheral portion on the back surface side bonded and fixed to the flange portion 104 a of the backlight holding frame 104.
The transparent adhesive sheet 103 a is a transparent adhesive sheet member having substantially the same size as the display area 102 a of the protective plate 102, and bonds only the display surface side of the liquid crystal display panel 103 and the back surface side of the protective plate 102.
　バックライト保持用フレーム１０４は、フレーム開口の周縁に内向きに張り出したフランジ部１０４ａが形成されたフレーム部材である。
　照明光源部１０５は、ＬＥＤなどのバックライト用光源と導光板とを含んで構成され、バックライト用光源から出射された光を、導光板で拡散光として液晶表示パネル１０３の裏面へ照射する。
　バックライト保持用ケース１０６は、一面が開口した箱形状のケースであり、照明光源部１０５を収納する。
　バックライト保持用フレーム１０４をバックライト保持用ケース１０６の開口部に取り付けることにより、フランジ部１０４ａとバックライト保持用ケース１０６との間に照明光源部１０５が収容される。 The backlight holding frame 104 is a frame member in which a flange portion 104a projecting inward is formed at the periphery of the frame opening.
The illumination light source unit 105 includes a backlight light source such as an LED and a light guide plate, and irradiates light emitted from the backlight light source to the back surface of the liquid crystal display panel 103 as diffused light by the light guide plate.
The backlight holding case 106 is a box-shaped case that is open on one side, and houses the illumination light source unit 105.
By attaching the backlight holding frame 104 to the opening of the backlight holding case 106, the illumination light source unit 105 is accommodated between the flange portion 104 a and the backlight holding case 106.
　図３は、従来の表示装置の構成を示す断面図であり、図１のＡ－Ａ線で図２の表示装置を切った矢印方向の断面を示している。図３において、表示面側ケース１０１と裏面側ケース１０７からなる筐体本体には、表示面側に、透明粘着シート１０３ａで保護板１０２が取り付けられた液晶表示パネル１０３が配設される。また、液晶表示パネル１０３の裏面側には、照明光源部１０５を収納するバックライト保持用フレーム１０４とバックライト保持用ケース１０６からなる保持筐体が配設される。
　液晶表示パネル１０３の裏面側の外周領域（印刷領域１０２ｂ）は、固定テープなどの非透光色の粘着部材１０２ｃによって表示面側ケース１０１のフランジ部１０１ａに接着固定されている。 FIG. 3 is a cross-sectional view showing the configuration of a conventional display device, and shows a cross-section in the direction of the arrow taken along the line AA in FIG. In FIG. 3, a liquid crystal display panel 103 to which a protective plate 102 is attached with a transparent adhesive sheet 103 a is disposed on the display surface side of a housing body including a display surface side case 101 and a back surface side case 107. In addition, on the back side of the liquid crystal display panel 103, a holding housing including a backlight holding frame 104 that houses the illumination light source unit 105 and a backlight holding case 106 is disposed.
The outer peripheral area (printing area 102b) on the back surface side of the liquid crystal display panel 103 is bonded and fixed to the flange portion 101a of the display surface side case 101 by a non-light-transmitting adhesive member 102c such as a fixing tape.
　図３に示すように、表示装置１００は、保護板１０２の非透光性の印刷領域１０２ｂを非透光色の粘着部材１０２ｃで表示面側ケース１０１に接着固定することにより、保護板１０２の周囲からの光漏れの低減を図っている。すなわち、この構成では、非透光色の粘着部材１０２ｃを印刷領域１０２ｃに沿って枠形状に設ける必要がある。
　しかしながら、表示装置１００ごとのサイズのばらつきを考慮した場合に、枠形状の粘着部材１０２ｃを形成することは、高い加工精度を必要とする。このため、装置コストのアップに繋がり、その形状の採用は困難である。
　これに対して、印刷領域１０２ｂに沿って非透光色の固定テープを保護板１０２の一辺ごとに貼り付けることで粘着部材１０２ｃを形成する構成も考えられるが、製造精度の関係上、不可避的にコーナー部分で固定テープの配置隙間が生じるため、その部分から光が漏れる結果となっていた。 As shown in FIG. 3, the display device 100 is configured such that the non-transparent print region 102 b of the protective plate 102 is bonded and fixed to the display surface side case 101 with a non-transparent adhesive member 102 c. The light leakage from the surroundings is reduced. That is, in this configuration, it is necessary to provide the non-light-transmitting adhesive member 102c in a frame shape along the print region 102c.
However, when the variation in size of each display device 100 is taken into consideration, forming the frame-shaped adhesive member 102c requires high processing accuracy. For this reason, it leads to an increase in apparatus cost and it is difficult to adopt the shape.
On the other hand, although the structure which forms the adhesive member 102c by affixing the non-translucent colored fixing tape to each side of the protection board 102 along the printing area | region 102b is also considered, it is unavoidable on the relationship of manufacturing accuracy. In this case, there is a gap between the fixing tapes at the corners, so that light leaks from those portions.
　そこで、この発明では、バックライト保持用フレーム１０４の代わりに、保護板の外周部を裏面側から保持するフランジ部を形成したフレームを使用し、さらに、粘着部材１０２ｃおよび透明粘着シート１０３ａの代わりに、フレームの上記フランジ部と液晶表示パネルの表示面側全面に裏面側が接着し、保護板の裏面側の略全面に表面側が接着する保護板に相当するサイズ（略同一なサイズ）の透明粘着シートを使用し、この透明粘着シートの側端面に対向して内部からの光を遮光する遮光部を設けている。このように構成することで、安価で簡易な構成で、表示装置の内部で発生した光の外部への漏れを防ぐことができる。 Therefore, in the present invention, instead of the backlight holding frame 104, a frame formed with a flange portion that holds the outer peripheral portion of the protective plate from the back side is used, and further, instead of the adhesive member 102c and the transparent adhesive sheet 103a. A transparent adhesive sheet having a size (substantially the same size) equivalent to a protective plate in which the rear surface side adheres to the flange portion of the frame and the entire display surface side of the liquid crystal display panel and the front surface side adheres to substantially the entire rear surface side of the protective plate The light shielding part which shields the light from the inside is provided facing the side end face of the transparent adhesive sheet. With such a configuration, leakage of light generated inside the display device to the outside can be prevented with an inexpensive and simple configuration.
　図４は、この発明の実施の形態１に係る表示装置の構成を示す分解斜視図であり、実施の形態１に係る表示装置の構成を概略的に示している。図５は、実施の形態１に係る表示装置を示す断面図であって、図１のＡ－Ａ線で図４の表示装置を切った矢印方向の断面を示している。図４に示すように、表示装置１は、表示面側ケース２、液晶表示パネル４、モールドフレーム５、照明光源部６、バックライト保持用ケース７および裏面側ケース８を備えて構成される。 FIG. 4 is an exploded perspective view showing the configuration of the display device according to the first embodiment of the present invention, and schematically shows the configuration of the display device according to the first embodiment. FIG. 5 is a cross-sectional view showing the display device according to the first embodiment, and shows a cross-section in the direction of the arrow taken along the line AA in FIG. As shown in FIG. 4, the display device 1 includes a display surface side case 2, a liquid crystal display panel 4, a mold frame 5, an illumination light source unit 6, a backlight holding case 7, and a back side case 8.
　モールドフレーム５は、非透光色（例えば、黒色）で照明光源部６を保持するフレームであって、液晶表示パネル４を取り付けるための第１のフランジ部であるフランジ部５ａと、フレーム開口の周縁の外向きに張り出した第２のフランジ部であるフランジ部５ｂとを備えている。図４に示すように、このモールドフレーム５をバックライト保持用ケース７の開口部に取り付けることで、従来と同様に、フランジ部５ａとバックライト保持用ケース７との間に照明光源部６を収容することができる。 The mold frame 5 is a frame that holds the illumination light source unit 6 in a non-translucent color (for example, black), a flange unit 5a that is a first flange unit for mounting the liquid crystal display panel 4, and a frame opening. And a flange portion 5b which is a second flange portion projecting outward from the peripheral edge. As shown in FIG. 4, by attaching the mold frame 5 to the opening of the backlight holding case 7, the illumination light source unit 6 is placed between the flange portion 5 a and the backlight holding case 7 as in the conventional case. Can be accommodated.
　また、モールドフレーム５は、保護板３の印刷領域３ｂに沿ってフレーム開口の周縁の外向きに張り出したフランジ部５ｂを有している。このフランジ部５ｂに保護板３が保持される。図２、図３に示した従来の構造では、バックライト保持用フレーム１０４で液晶表示パネル１０３を保持し、バックライト保持用フレーム１０４とは別部材の表示面側ケース１０１で保護板１０２を保持している。このため、バックライト保持用フレーム１０４と表示面側ケース１０１の寸法公差を考慮すると平面性を確保しにくく、保護板１０２と略同一なサイズの透明粘着シートを使用することが困難であった。 Also, the mold frame 5 has a flange portion 5b that protrudes outward along the printing region 3b of the protective plate 3 to the periphery of the frame opening. The protective plate 3 is held by the flange portion 5b. In the conventional structure shown in FIGS. 2 and 3, the liquid crystal display panel 103 is held by the backlight holding frame 104, and the protective plate 102 is held by the display surface side case 101, which is a separate member from the backlight holding frame 104. is doing. For this reason, in consideration of the dimensional tolerance between the backlight holding frame 104 and the display surface side case 101, it is difficult to ensure flatness and it is difficult to use a transparent adhesive sheet having substantially the same size as the protective plate 102.
　これに対して、この発明では、液晶表示パネル４を保持するモールドフレーム５で保護板３も保持するため、平面性を確保しやすく、保護板３と略同一なサイズの透明粘着シート４ａを使用することができる。これにより、粘着部材を枠形状に形成したり、固定テープを貼り合わせる必要がない。従って、製造が容易でありかつ製品コストを低減することも可能となる。 On the other hand, in this invention, since the protective plate 3 is also held by the mold frame 5 that holds the liquid crystal display panel 4, it is easy to ensure flatness, and the transparent adhesive sheet 4a having the same size as the protective plate 3 is used. can do. Thereby, it is not necessary to form the adhesive member in a frame shape or to attach the fixing tape. Therefore, the manufacturing is easy and the product cost can be reduced.
　また、保護板３の裏面側全面を透明粘着シート４ａで接着するため、保護板３が割れた際にも、その破片は透明粘着シート４ａに貼り付いたままとなるため、破片の飛散を防止できる。さらに、保護板３の外周部とフランジ部５ｂとを貼り付けるので、保護板３の印刷領域３ｂと表示面側ケース２との隙間から入った塵埃が液晶表示パネル４側に流入することも防止可能である。 In addition, since the entire back side of the protective plate 3 is bonded with the transparent adhesive sheet 4a, even when the protective plate 3 is cracked, the fragments remain attached to the transparent adhesive sheet 4a, thus preventing scattering of the fragments. it can. Further, since the outer peripheral portion of the protective plate 3 and the flange portion 5b are attached, it is possible to prevent dust entering from the gap between the printing region 3b of the protective plate 3 and the display surface side case 2 from flowing into the liquid crystal display panel 4 side. Is possible.
　保護板３の裏面全面と略同一なサイズの透明粘着シート４ａでは、粘着部材１０２ｃと透明粘着シート１０３ａとを使用する場合と異なって、透明粘着シート４ａの内部で光を遮断する部位がない。このため、照明光源部６からの光が、透明粘着シート４ａの側端面から外部へ漏れる可能性がある。
　そこで、この発明では、透明粘着シート４ａの側端面に対向して光漏れを遮断する遮光部を設けている。図４、図５の例では、遮光部は、フランジ部５ｂから保護板３に向けて立設した立ち壁部５ｃである。このように構成することで、安価で簡易な構成で、表示装置１の内部で発生した光の外部への漏れを防ぐことができる。 Unlike the case where the adhesive member 102c and the transparent adhesive sheet 103a are used, the transparent adhesive sheet 4a having substantially the same size as the entire back surface of the protective plate 3 has no portion that blocks light inside the transparent adhesive sheet 4a. For this reason, the light from the illumination light source part 6 may leak outside from the side end surface of the transparent adhesive sheet 4a.
Therefore, in the present invention, a light shielding portion that blocks light leakage is provided opposite to the side end face of the transparent adhesive sheet 4a. In the example of FIGS. 4 and 5, the light shielding portion is a standing wall portion 5 c erected from the flange portion 5 b toward the protection plate 3. With this configuration, it is possible to prevent leakage of light generated inside the display device 1 to the outside with an inexpensive and simple configuration.
　立ち壁部５ｃの高さは、図５に示すように、保護板３の裏面に可能な限り近接する高さとすることで、遮光効果の向上を図ることができる。例えば、透明粘着シート４ａの厚み分の高さと略同一とし、透明粘着シート４ａに保護板３が接着された際に、立ち壁部５ｃの上端面が印刷領域３ｂに当接するようにする。 The height of the standing wall 5c is set as close as possible to the back surface of the protective plate 3 as shown in FIG. For example, the height of the transparent adhesive sheet 4a is substantially the same as the height of the transparent adhesive sheet 4a, and when the protective plate 3 is bonded to the transparent adhesive sheet 4a, the upper end surface of the standing wall 5c is brought into contact with the printing region 3b.
　なお、保護板３は、各端辺部分に形成された非透光性の印刷領域３ｂで遮光されることから、その側端面からの光漏れは微弱である。
　従って、図５に示すように、保護板３と液晶表示パネル４を収容したモールドフレーム５およびバックライト保持用ケース７からなる構造体を、表示面側ケース２の開口部分に収容した状態で、保護板３の側端面に対向して表示面側ケース２の内壁面が配設されるように構成することで、保護板３の側端面からの光漏れを十分に防止できる。 In addition, since the protective plate 3 is shielded by the non-transparent printing region 3b formed at each end portion, light leakage from the side end surface is weak.
Therefore, as shown in FIG. 5, in a state where the structure composed of the mold frame 5 containing the protective plate 3 and the liquid crystal display panel 4 and the backlight holding case 7 is received in the opening portion of the display surface side case 2, By configuring the inner surface of the display surface side case 2 so as to face the side end surface of the protection plate 3, light leakage from the side end surface of the protection plate 3 can be sufficiently prevented.
　表示面側ケース２は、表示装置１の表示面側の筐体を構成するフレーム形状の意匠筐体である。この発明に係る表示面側ケース２は、図２，図３に示した構造と異なって、保護板３と液晶表示パネル４を収容したモールドフレーム５およびバックライト保持用ケース７からなる構造体を保持する。より詳しく説明すると、図５に示すように、表示面側ケース２の開口部の周縁に内向きに張り出したフランジ部２ａに、モールドフレーム５のフランジ部５ｂの裏面側が保持される。例えば、粘着部材を用いて接着固定する。
　この表示面側ケース２を、図４に示すように裏面側ケース８に組み付けることにより、表示装置１の筐体本体となる。 The display surface side case 2 is a frame-shaped design housing that constitutes a housing on the display surface side of the display device 1. Unlike the structure shown in FIGS. 2 and 3, the display surface side case 2 according to the present invention has a structure composed of a mold frame 5 containing a protective plate 3 and a liquid crystal display panel 4 and a backlight holding case 7. Hold. More specifically, as shown in FIG. 5, the rear surface side of the flange portion 5 b of the mold frame 5 is held by the flange portion 2 a projecting inwardly at the periphery of the opening of the display surface side case 2. For example, it is bonded and fixed using an adhesive member.
The display surface side case 2 is assembled to the back surface side case 8 as shown in FIG.
　図６は、実施の形態１に係る表示装置のタッチパネルを備えた構成を示す断面図である。図６に示す表示装置１Ａでは、液晶表示パネル４が表示面上にタッチパネル９を備え、透明粘着シート４ａが裏面側でタッチパネル９の表面側を接着している。なお、タッチパネル９と液晶表示パネル４とは、図６に示すように透光色の粘着部材４ｂで接着固定されている。これにより、表示装置１Ａにタッチ操作機能を持たせることができる。
　なお、透光色の粘着部材での貼り合わせ部品数が多くなるにつれて、その側端面での光漏れ量が多くなる傾向にあるため、タッチパネル９を介在させた構成においても立ち壁部５ｃを設けることにより、光漏れ量を低減することが可能である。 FIG. 6 is a cross-sectional view illustrating a configuration including the touch panel of the display device according to the first embodiment. In the display device 1 </ b> A shown in FIG. 6, the liquid crystal display panel 4 includes a touch panel 9 on the display surface, and the transparent adhesive sheet 4 a adheres the front surface side of the touch panel 9 on the back surface side. The touch panel 9 and the liquid crystal display panel 4 are bonded and fixed with a translucent adhesive member 4b as shown in FIG. Thereby, the display device 1A can be provided with a touch operation function.
Since the amount of light leakage at the side end surface tends to increase as the number of parts to be bonded with the translucent adhesive member increases, the standing wall 5c is provided even in the configuration with the touch panel 9 interposed. As a result, the amount of light leakage can be reduced.
　以上のように、この実施の形態１によれば、一面が開口し、導光体を含んだ照明光源部６を収納するバックライト保持用ケース７と、フレーム開口の周縁に内向きに張り出したフランジ部５ａとフレーム開口の周縁から外向きに張り出したフランジ部５ｂを有し、バックライト保持用ケース７の開口部に取り付けられてフランジ部５ａとバックライト保持用ケース７との間で照明光源部６を収容するモールドフレーム５と、照明光源部６の光で裏面側から照明される液晶表示パネル４と、液晶表示パネル４の表面側を保護する透明な板状部材であって、当該液晶表示パネル４の表示領域の周囲に対応する領域に非透光性の印刷が施された保護板３と、保護板３の表示領域３ａからその周囲にある印刷領域３ｂまでを含む当該保護板３の裏面側全面に相当するサイズを有しており、裏面側が液晶表示パネル４の表示面側全面とフランジ部５ｂに接着し、表面側が保護板３の裏面側に接着する透明粘着シート４ａと、少なくとも透明粘着シート４ａの側端面に対向して設けられ、当該透明粘着シート４ａの側端面からの光を遮光する立ち壁部５ｃとを備える。
　このように構成することで、表示装置１の内部で発生した光が、透明粘着シート４ａの側端面からの光漏れを防ぐことができる。
　また、従来よりもサイズを拡大した透明粘着シート４ａを用いることにより、保護板３の接着面積が確保されて、その保持力を向上させることができる。
　さらに、透明粘着シート４ａが保護板３の裏面側のほぼ全面に接着しているので、保護板３が割れた場合でもその破片が飛散することがない。 As described above, according to the first embodiment, one surface is opened, the backlight holding case 7 that houses the illumination light source unit 6 including the light guide, and the inward projecting to the periphery of the frame opening. It has a flange portion 5b and a flange portion 5b projecting outward from the periphery of the frame opening, and is attached to the opening portion of the backlight holding case 7 so as to illuminate between the flange portion 5a and the backlight holding case 7. A mold frame 5 that accommodates the portion 6, a liquid crystal display panel 4 that is illuminated from the back side with the light of the illumination light source portion 6, and a transparent plate-like member that protects the front side of the liquid crystal display panel 4. The protective plate 3 including a protective plate 3 in which non-transparent printing is performed in a region corresponding to the periphery of the display region of the display panel 4, and the display region 3a of the protective plate 3 to the print region 3b around the protective plate 3 Back side of A transparent adhesive sheet 4a having a size corresponding to the surface, the back side being bonded to the entire display surface side of the liquid crystal display panel 4 and the flange portion 5b, and the front side being bonded to the back side of the protective plate 3, and at least transparent adhesive A standing wall portion 5c is provided opposite to the side end surface of the sheet 4a and shields light from the side end surface of the transparent adhesive sheet 4a.
By comprising in this way, the light which generate | occur | produced inside the display apparatus 1 can prevent the light leakage from the side end surface of the transparent adhesive sheet 4a.
Moreover, by using the transparent adhesive sheet 4a whose size is larger than that of the conventional one, the adhesion area of the protective plate 3 is secured, and the holding power can be improved.
Furthermore, since the transparent adhesive sheet 4a is adhered to almost the entire back surface of the protective plate 3, even if the protective plate 3 is broken, the fragments are not scattered.
　また、この実施の形態１によれば、液晶表示パネル４が表面にタッチパネル９を備え、透明粘着シート４ａが、裏面側でタッチパネル９の表面側を接着するので、上記と同様の効果が得られるとともに、タッチ操作機能を表示装置１Ａに持たせることができる。 Moreover, according to this Embodiment 1, since the liquid crystal display panel 4 is provided with the touch panel 9 on the surface and the transparent adhesive sheet 4a adhere | attaches the surface side of the touch panel 9 on the back surface side, the effect similar to the above is acquired. At the same time, the display device 1A can have a touch operation function.
　なお、上記実施の形態１においては、遮光部が、立ち壁部５ｃである場合を示したが、これに限定されるものではない。例えば、実施の形態２，３で後述する構成の他、透明粘着シート４ａの側端面に対向するように、フランジ部５ｂの側端面に非透光性の粘着テープを貼り付けた構成であってもよい。 In addition, in the said Embodiment 1, although the case where the light-shielding part was the standing wall part 5c was shown, it is not limited to this. For example, in addition to the configurations described later in Embodiments 2 and 3, a non-translucent adhesive tape is attached to the side end surface of the flange portion 5b so as to face the side end surface of the transparent adhesive sheet 4a. Also good.
実施の形態２．
　図７は、この発明の実施の形態２に係る表示装置の構成を示す断面図であって、図１のＡ－Ａ線で実施の形態２に係る表示装置１Ｂを切った矢印方向の断面を示している。図７に示すように、表示装置１Ｂでは、モールドフレーム５Ａのフランジ部５ｂから立設した立ち壁部５ｃ－１が、透明粘着シート４ａの側端面と保護板３の側端面とにそれぞれ対向している。このように双方の側端面を覆う形状とすることで、遮光効果を格段に向上させることができる。なお、実施の形態２は、図６と同様にタッチパネル９を介在させた構成においても採用することが可能である。 Embodiment 2. FIG.
FIG. 7 is a cross-sectional view showing the configuration of the display device according to the second embodiment of the present invention, and shows a cross section in the direction of the arrow taken along the line AA in FIG. 1 along the display device 1B according to the second embodiment. Show. As shown in FIG. 7, in the display device 1B, the standing wall portion 5c-1 erected from the flange portion 5b of the mold frame 5A is opposed to the side end surface of the transparent adhesive sheet 4a and the side end surface of the protection plate 3, respectively. ing. Thus, by making it the shape which covers both side end surfaces, the light-shielding effect can be improved markedly. The second embodiment can also be adopted in a configuration in which a touch panel 9 is interposed as in FIG.
　昨今、意匠性の向上の観点から、保護板３の印刷領域３ｂの幅を可能な限り小さくした表示装置もある。この場合、装置内部の光が印刷領域３ｂで完全に遮光されず、保護板３の側端面から漏れ出る可能性がある。
　そこで、このような表示装置に対して、透明粘着シート４ａの側端面と保護板３の側端面にそれぞれ対向する立ち壁部５ｃ－１を設けることにより、上述した光漏れを低減することができる。 Recently, there is also a display device in which the width of the printing region 3b of the protective plate 3 is made as small as possible from the viewpoint of improving the design. In this case, the light inside the apparatus is not completely shielded in the printing region 3 b and may leak from the side end face of the protection plate 3.
Therefore, for such a display device, the above-described light leakage can be reduced by providing the standing wall portions 5c-1 facing the side end surface of the transparent adhesive sheet 4a and the side end surface of the protective plate 3, respectively. .
　以上のように、この実施の形態２によれば、立ち壁部５ｃ－１が、透明粘着シート４ａの側端面と保護板３の側端面とに対向するので、実施の形態１の構成に比べて遮光効果を向上させることができる。 As described above, according to the second embodiment, the standing wall portion 5c-1 faces the side end surface of the transparent adhesive sheet 4a and the side end surface of the protective plate 3, so that it is compared with the configuration of the first embodiment. Thus, the light shielding effect can be improved.
実施の形態３．
　図８は、この発明の実施の形態３に係る表示装置の構成を示す断面図であって、図１のＡ－Ａ線で実施の形態３に係る表示装置１Ｃを切った矢印方向の断面を示している。
　図８に示す表示装置１Ｃにおいて、表示面側ケース２Ａは、表裏を貫通した開口部を有し、保護板３と液晶表示パネル４をバックライト保持用ケース７とともに収容したモールドフレーム５が表面側の開口部に組み付けられる意匠筐体である。
　また、この実施の形態３では、モールドフレーム５Ｂのフランジ部５ｂに立ち壁部を設けず、遮光部を段差部２Ａ－１で構成している。段差部２Ａ－１は、表示面側ケース２Ａの表面側の開口部周縁から内向きに迫り出した段差部であり、その壁面部が透明粘着シート４ａの側端面に対向している。 Embodiment 3 FIG.
FIG. 8 is a cross-sectional view showing the configuration of the display device according to Embodiment 3 of the present invention, and shows a cross-section in the arrow direction taken along line AA in FIG. 1 along the display device 1C according to Embodiment 3. Show.
In the display device 1 </ b> C shown in FIG. 8, the display surface side case 2 </ b> A has an opening penetrating the front and back, and the mold frame 5 that houses the protective plate 3 and the liquid crystal display panel 4 together with the backlight holding case 7 is on the front side. It is the design housing | casing assembled | attached to the opening part.
In the third embodiment, the flange portion 5b of the mold frame 5B is not provided with a standing wall portion, and the light shielding portion is constituted by the step portion 2A-1. The stepped portion 2A-1 is a stepped portion that protrudes inward from the periphery of the opening on the surface side of the display surface side case 2A, and the wall surface portion faces the side end surface of the transparent adhesive sheet 4a.
　なお、段差部２Ａ－１の段差面２Ａ－２を、図８に示すように、保護板３の裏面に可能な限り近接させることで、遮光効果の向上を図ることができる。例えば、段差部２Ａ－１の高さを透明粘着シート４ａの厚み分と略同一とし、透明粘着シート４ａに保護板３が接着された際に、段差面２Ａ－２が印刷領域３ｂに当接するようにする。 It should be noted that the light shielding effect can be improved by bringing the step surface 2A-2 of the step portion 2A-1 as close as possible to the back surface of the protective plate 3 as shown in FIG. For example, when the height of the stepped portion 2A-1 is substantially the same as the thickness of the transparent adhesive sheet 4a and the protective plate 3 is bonded to the transparent adhesive sheet 4a, the stepped surface 2A-2 comes into contact with the printing region 3b. Like that.
　以上のように、この実施の形態３によれば、表裏を貫通した開口部を有し、保護板３と液晶表示パネル４をバックライト保持用ケース７とともに収容したモールドフレーム５が表面側の開口部に組み付けられる表示面側ケース２Ａを備え、遮光部が表示面側ケース２Ａの表面側の開口部周縁から内向きに迫り出して少なくとも透明粘着シート４ａの側端面に対向する段差部２Ａ－１である。このように構成することで、実施の形態１と同様に、表示装置１Ｃの内部で発生した光が透明粘着シート４ａの側端面からの光漏れを防ぐことができる。 As described above, according to the third embodiment, the mold frame 5 having the opening portion penetrating the front and back and housing the protective plate 3 and the liquid crystal display panel 4 together with the backlight holding case 7 is provided on the front side. A display surface side case 2A assembled to the display portion, and the light shielding portion protrudes inwardly from the peripheral edge of the opening on the surface side of the display surface side case 2A and faces at least the side end surface of the transparent adhesive sheet 4a. It is. With this configuration, similarly to Embodiment 1, light generated inside the display device 1C can be prevented from leaking light from the side end face of the transparent adhesive sheet 4a.
　なお、本発明はその発明の範囲内において、各実施の形態の自由な組み合わせ、あるいは各実施の形態の任意の構成要素の変形、もしくは各実施の形態において任意の構成要素の省略が可能である。 In the present invention, within the scope of the invention, any combination of each embodiment, any component of each embodiment can be modified, or any component can be omitted in each embodiment. .
　この発明に係る表示装置は、装置内部で発生した光の外部への漏れを防ぐことができるので、夜間の車室のように漏れ光が目立つ可能性がある車載用の表示装置に好適である。 The display device according to the present invention can prevent leakage of light generated inside the device to the outside, and thus is suitable for a vehicle-mounted display device in which leakage light may be conspicuous like a passenger compartment at night. .
　１，１Ａ～１Ｃ，１００　表示装置、２，２Ａ，１０１　表示面側ケース、２ａ，５ａ，５ｂ，１０１ａ　フランジ部、２Ａ－１　段差部、２Ａ－２　段差面、３，１０２　保護板、３ａ，１０２ａ　表示領域、３ｂ，１０２ｂ　印刷領域、４，１０３　液晶表示パネル、４ａ，１０３ａ　透明粘着シート、４ｂ　透光色の粘着部材、５，５Ａ，５Ｂ　モールドフレーム、５ｃ，５ｃ－１　立ち壁部、６，１０５　照明光源部、７，１０６　バックライト保持用ケース、８，１０７　裏面側ケース、９　タッチパネル、１０２ｃ　非透光色の粘着部材、１０４　バックライト保持用フレーム。 1, 1A to 1C, 100 display device, 2, 2A, 101 display surface side case, 2a, 5a, 5b, 101a flange portion, 2A-1 step portion, 2A-2 step surface, 3,102 protective plate, 3a, 102a display area, 3b, 102b printing area, 4,103 liquid crystal display panel, 4a, 103a transparent adhesive sheet, 4b translucent adhesive member, 5, 5A, 5B mold frame, 5c, 5c-1 standing wall, 6 , 105 Illumination light source part, 7, 106 Backlight holding case, 8, 107 Back side case, 9 Touch panel, 102c Non-translucent adhesive member, 104 Backlight holding frame.

Claims (5)

  1. 　一面が開口し、導光体を含んだ照明光源部を収納するケースと、
    　フレーム開口の周縁に内向きに張り出した第１のフランジ部と前記フレーム開口の周縁から外向きに張り出した第２のフランジ部を有し、前記ケースの開口部に取り付けられて前記第１のフランジ部と前記ケースとの間で前記照明光源部を収容するフレームと、
    　前記照明光源部の光で裏面側から照明される液晶表示パネルと、
    　前記液晶表示パネルの表面側を保護する透明な板状部材であって、当該液晶表示パネルの表示領域の周囲に対応する領域に非透光性の印刷が施された保護板と、
    　前記保護板の表示領域からその周囲にある印刷領域までを含む当該保護板の裏面側全面に相当するサイズを有しており、裏面側が前記液晶表示パネルの表示面側全面と前記第２のフランジ部に接着し、表面側が前記保護板の裏面側に接着する透明粘着シート部材と、
    　少なくとも前記透明粘着シート部材の側端面に対向して設けられ、当該透明粘着シート部材の側端面からの光を遮光する遮光部とを備える表示装置。     A case that opens on one side and houses the illumination light source unit including the light guide;
    A first flange portion projecting inwardly at a peripheral edge of the frame opening, and a second flange portion projecting outward from the peripheral edge of the frame opening, and the first flange portion attached to the opening portion of the case A frame that houses the illumination light source unit between the unit and the case;
    A liquid crystal display panel illuminated from the back side with the light of the illumination light source unit;
    A transparent plate-like member that protects the surface side of the liquid crystal display panel, and a protective plate in which non-transparent printing is applied to a region corresponding to the periphery of the display region of the liquid crystal display panel;
    The protective plate has a size corresponding to the entire back surface side of the protection plate including the display area of the protection plate to the surrounding print area, and the back surface is the entire display surface side of the liquid crystal display panel and the second flange. A transparent pressure-sensitive adhesive sheet member that is bonded to the surface and the front side is bonded to the back side of the protective plate;
    A display device comprising: a light shielding portion that is provided to face at least a side end surface of the transparent adhesive sheet member and shields light from the side end surface of the transparent adhesive sheet member.
  2. 　前記液晶表示パネルは、表示面上にタッチパネルを備え、
    　前記透明粘着シート部材は、裏面側で前記タッチパネルの表面側を接着することを特徴とする請求項１記載の表示装置。     The liquid crystal display panel includes a touch panel on a display surface,
    The display device according to claim 1, wherein the transparent adhesive sheet member adheres a front surface side of the touch panel on a back surface side.
  3. 　前記遮光部は、前記第２のフランジ部から前記保護板に向けて立設した立ち壁部であることを特徴とする請求項１記載の表示装置。 The display device according to claim 1, wherein the light-shielding portion is a standing wall portion erected from the second flange portion toward the protection plate.
  4. 　前記立ち壁部は、前記透明粘着シート部材の側端面と前記保護板の側端面とに対向することを特徴とする請求項３記載の表示装置。 4. The display device according to claim 3, wherein the standing wall portion faces a side end surface of the transparent adhesive sheet member and a side end surface of the protection plate.
  5. 　表裏を貫通した開口部を有し、前記保護板と前記液晶表示パネルを前記ケースとともに収容した前記フレームが表面側の開口部に組み付けられる意匠筐体を備え、
    　前記遮光部は、前記意匠筐体の表面側の開口部周縁から内向きに迫り出して少なくとも前記透明粘着シート部材の側端面に対向する段差部であることを特徴とする請求項１記載の表示装置。     It has an opening that penetrates the front and back, and includes a design housing in which the frame containing the protective plate and the liquid crystal display panel together with the case is assembled to the opening on the front side,
    2. The display according to claim 1, wherein the light-shielding portion is a stepped portion that protrudes inward from a peripheral edge of the opening on the surface side of the design housing and faces at least a side end surface of the transparent adhesive sheet member. apparatus.
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