WO2016129037A1 - Display device - Google Patents

Display device Download PDF

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Publication number
WO2016129037A1
WO2016129037A1 PCT/JP2015/053526 JP2015053526W WO2016129037A1 WO 2016129037 A1 WO2016129037 A1 WO 2016129037A1 JP 2015053526 W JP2015053526 W JP 2015053526W WO 2016129037 A1 WO2016129037 A1 WO 2016129037A1
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WO
WIPO (PCT)
Prior art keywords
guide plate
light guide
light
main body
liquid crystal
Prior art date
Application number
PCT/JP2015/053526
Other languages
French (fr)
Japanese (ja)
Inventor
信宏 米澤
貴志 巌城
Original Assignee
堺ディスプレイプロダクト株式会社
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.)
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Application filed by 堺ディスプレイプロダクト株式会社 filed Critical 堺ディスプレイプロダクト株式会社
Priority to PCT/JP2015/053526 priority Critical patent/WO2016129037A1/en
Publication of WO2016129037A1 publication Critical patent/WO2016129037A1/en

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    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements

Definitions

  • the present invention relates to a display device that displays an image.
  • a display device including a liquid crystal panel as an image display unit includes a backlight on the back side of the liquid crystal panel, modulates and transmits the light emitted from the backlight by the liquid crystal panel, and displays an image on the front of the liquid crystal panel. It is configured as follows. Backlights are roughly classified into direct type and edge light type. In recent years, edge light type backlights are widely used from the viewpoint of reducing power consumption and reducing the thickness.
  • Edge light type backlight includes a light guide plate and a light source housed in a backlight chassis having a shallow box shape.
  • the light guide plate is a flat plate made of glass or a resin material having translucency, and is placed on the bottom plate of the backlight chassis.
  • the light source is attached to one side wall of the backlight chassis and is opposed to one side surface of the light guide plate.
  • the light from the light source is incident on one side of the light guide plate and travels through the light guide plate by repeating total reflection due to the difference in refractive index between air and the light guide plate.
  • the light traveling in the light guide plate is reflected and scattered by the dot pattern provided on the light guide plate, and is distributed and emitted over the entire wide surface of the light guide plate exposed to the opening side of the backlight chassis.
  • the display device is configured such that a wide surface of the light guide plate is opposed to the back surface of the liquid crystal panel, and an optical sheet is interposed between the opposed surfaces.
  • the optical sheet is an optical element that functions to diffuse and collect light, and light emitted from the light guide plate is irradiated onto the liquid crystal panel through the optical sheet.
  • a display device has been proposed in which a spacer is provided between the light guide plate and the liquid crystal panel and a space for interposing the optical sheet is secured.
  • the display device (display module) described in Patent Document 1 the light guide plate and the liquid crystal panel are opposed to each other with an appropriate interval by a frame-like spacer provided on each peripheral portion, and an optical sheet Is disposed in the inner space of the spacer.
  • the spacer may secure a space for interposing the optical sheet and may couple the light guide plate and the liquid crystal panel.
  • the spacer material include UV curable or moisture curable resins.
  • the properties of the resin are various, and a resin that is preferable from the viewpoint of simplicity and strength of coupling between the light guide plate and the liquid crystal panel may have translucency and a refractive index higher than air.
  • the light emitted from the light guide plate may enter the liquid crystal panel or the optical sheet through the spacer from the coupling portion of the light guide plate and the spacer. It is difficult to control luminance unevenness due to unintended light incidence, and unintentional light emission is remarkably confirmed when the user squints the screen, and the display quality of the display device deteriorates.
  • the present invention has been made in view of such circumstances, and an object thereof is to provide a display device capable of maintaining display quality.
  • a display device includes a display panel for displaying an image on one surface, a light guide plate disposed opposite to the other surface of the display panel, an optical sheet interposed between the display panel and the light guide plate,
  • the spacer includes a main body fixed to the display panel, the light guide plate, And a light-shielding portion that is fixed to the main body and blocks light incident on the main body from the light guide plate.
  • the light blocking portion blocks light from entering the main body from the light guide plate. Therefore, even when the main body portion of the spacer has translucency, light is prevented from entering the liquid crystal panel or the optical sheet via the main body portion, and display quality is maintained.
  • the display device according to the present invention is characterized in that the main body portion is made of a UV curable resin.
  • the main body can be easily formed by using a UV curable resin.
  • the display device according to the present invention is characterized in that the light shielding portion is black.
  • the light shielding portion is black, it is possible to more reliably block light from entering the main body portion.
  • the main body portion has a frame shape
  • the light shielding portion is arranged along a part or all of the main body portion
  • a width dimension is equal to or larger than a width dimension of the main body portion. It is characterized by.
  • the light shielding portion can more reliably block the light from entering the main body portion, and is firmly fixed to the main body portion and the light guide plate.
  • FIG. 2 is a cross-sectional view taken along line II-II in FIG. It is a side view which shows the structure of a spacer. It is sectional drawing which shows the light-shielding part which concerns on a modification.
  • FIG. 1 is a cross-sectional view showing a main part of the display device 1.
  • the display device 1 includes a liquid crystal panel 10, a bezel 11, a backlight chassis 12, and a backlight 20.
  • the liquid crystal panel 10 has a rectangular shape, and the display surface 10a for displaying an image is the front.
  • the backlight chassis 12 is disposed on the back side of the liquid crystal panel 10, and has a rectangular bottom plate 12a facing the liquid crystal panel 10, and a side plate 12b that rises vertically from the four sides of the bottom plate toward the liquid crystal panel 10 side. And has a shallow box shape with an open front side.
  • the backlight 20 includes a rectangular light guide plate 21 housed in the backlight chassis 12 and a plurality of light sources 41, 41... Facing one side surface of the light guide plate 21.
  • the light guide plate 21 is a flat plate made of glass or a resin material having translucency, and has one wide surface and another wide surface provided with a dot pattern for scattering light.
  • the light guide plate 21 is placed on the bottom plate 12 a of the backlight chassis 12 via the reflection sheet 22.
  • the other wide surface of the light guide plate 21 is in contact with the reflection sheet 22.
  • the light sources 41, 41... are arranged side by side on the substrate 40 attached to one side wall of the side plate 12 b of the backlight chassis 12 corresponding to one side surface of the light guide plate 21.
  • a spacer 30 is provided on one wide surface of the light guide plate 21, and the liquid crystal panel 10 is coupled to the light guide plate 21 through the spacer 30.
  • the spacer 30 is fixed to the edge of the back surface of the liquid crystal panel 10 and the edge of the wide surface of the light guide plate 21.
  • optical sheets 23a, 23b, 23c, and 23d that perform light diffusion and light condensing functions are disposed on one wide surface of the light guide plate 21.
  • the optical sheets 23 a, 23 b, 23 c, and 23 d are arranged so as to overlap in order in the facing direction of the liquid crystal panel 10 and the light guide plate 21, and the optical sheet 23 d is arranged closest to the liquid crystal panel 10.
  • Spaces for interposing the optical sheets 23a, 23b, 23c, and 23d are secured between the liquid crystal panel 10 and the light guide plate 21 by the spacer 30.
  • the bezel 11 includes a rectangular frame-shaped frame 11a located on the front side of the liquid crystal panel 10, and a side plate 11b that rises vertically from the four sides forming the outer periphery of the frame 11a toward the backlight chassis 12 side.
  • the bezel 11 covers the liquid crystal panel 10 from the front so that the side plate 11b contacts the side plate 12b of the backlight chassis 12.
  • the peripheral edge of the display surface 10 a of the liquid crystal panel 10 is covered with the frame 11 a of the bezel 11 with the buffer material 13 interposed therebetween.
  • FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1
  • FIG. 3 is a side view showing the structure of the spacer 30.
  • the optical sheets 23a, 23b, 23c, and 23d have a rectangular shape, and are provided with a convex portion in a direction parallel to the surface at the center of each of the two long sides.
  • the optical sheets 23 a, 23 b, 23 c, and 23 d are arranged with a convex portion on the wide surface of the light guide plate 21.
  • the spacer 30 has a rectangular frame shape, and is formed along the four sides of the light guide plate 21 at the edge of the wide surface of the light guide plate 21.
  • the spacer 30 has two short side spacers 30a and 30a and two long side spacers 30b and 30b.
  • the long side spacers 30b are separated at the center in the length direction, and the opposite ends of the separated portions are bent outwardly of the light guide plate 21, respectively.
  • a gap is formed in the long side spacer 30b by the opposed end portions.
  • optical sheets 23 a, 23 b, 23 c, and 23 d are arranged in the inner space of the spacer 30. Further, the respective convex portions of the optical sheets 23a, 23b, 23c, and 23d are inserted into the gaps of the long side spacer 30b.
  • the spacer 30 includes a rectangular frame-shaped main body portion 31 fixed to the liquid crystal panel 10 and a rectangular frame-shaped light shielding portion 32 fixed to the light guide plate 21 so as to be aligned in the opposing direction of the liquid crystal panel 10 and the light guide plate 21. .
  • the main body 31 is made of a UV curable resin, and has a rectangular frame-shaped space holding layer 33 fixed to the light shielding portion 32 and a rectangular frame-shaped fixed layer 34 fixed to the liquid crystal panel 10. .
  • the fixing layer 34 is thinner than the space holding layer 33, and the fixing layer 34 and the space holding layer 33 are fixed to each other.
  • the total thickness of the light shielding portion 32 and the space holding layer 33 is thicker than the total thickness of the optical sheets 23a, 23b, 23c, and 23d. Thereby, the light-shielding part 32 and the space holding layer 33 ensure the space in which the optical sheets 23a, 23b, 23c, and 23d are interposed.
  • the main body 31 has short-side body portions 31a and 31a at portions corresponding to the short-side spacers 30a and 30a, and the long-side body portions 31b and 31b at portions corresponding to the long-side spacers 30b and 30b. Have.
  • the space holding layer 33 includes short side space holding layers 33a and 33a and long side space holding layers 33b and 33b
  • the fixing layer 34 includes the short side fixing layers 34a and 34a and the long side fixing. It has layers 34b and 34b.
  • the light shielding portion 32 includes short side light shielding portions 32a and 32a at portions corresponding to the short side spacers 30a and 30a, and long side light shielding portions 32b and 32b at portions corresponding to the long side spacers 30b and 30b. 32b.
  • the light-shielding part 32 is black and is formed by coating with drip or application of moisture curable resin, printing of pigment, metal vapor deposition, or the like. Moreover, the width dimension of the short side light-shielding part 32a and the long side light-shielding part 32b is equal to or larger than the width dimension of the short side body part 31a and the long side body part 31b, respectively. That is, the width dimension of the light shielding part 32 is equal to or larger than the width dimension of the main body part 31.
  • the light emitted from the light source 41 is incident from one side of the light guide plate 21 and travels through the light guide plate 21 by repeating total reflection due to the difference in refractive index between air and the light guide plate.
  • the light traveling in the light guide plate 21 is reflected and scattered by the dot pattern provided on the other wide surface of the light guide plate 21 and is distributed and emitted over the entire wide surface.
  • the light emitted from the light guide plate 21 is modulated and transmitted by the liquid crystal panel 10 after being diffused and condensed by the optical sheets 23a, 23b, 23c, and 23d, and displays an image on the display surface 10a.
  • the light shielding portion 32 blocks light from entering the main body portion 31 from the light guide plate 21. Therefore, even when the main body 31 of the spacer 30 has translucency and the refractive index is larger than that of air, the light to the liquid crystal panel 10 or the optical sheets 23a, 23b, 23c, and 23d via the main body 31 is obtained. Can be prevented, and the display quality of the liquid crystal panel 10 is maintained.
  • the main body 31 can be easily formed by using a UV curable resin. Since the light shielding portion 32 is black, it is possible to more reliably block light from entering the main body portion 31. Furthermore, since the width dimension of the light shielding part 32 is equal to or larger than the width dimension of the main body part 31, it is possible to more reliably block light from entering the main body part 31.
  • the light shielding part 32 is firmly fixed to the main body part 31 and the light guide plate 21.
  • the main body 31 of the spacer 30 may not be formed of a UV curable resin, but may be formed of a moisture curable resin or a hot melt resin. Further, the optical sheets 23a, 23b, 23c, and 23d may have a configuration in which no convex portion is provided.
  • FIG. 4 is a cross-sectional view showing a light shielding part 32 according to a modification.
  • the light shielding part 32 has short side light shielding parts 32a and 32a, and does not have long side light shielding parts 32b and 32b.
  • the short side body parts 31a and 31a are made of a UV curable resin, and the long side body parts 31b and 31b are made of a light-shielding material.
  • the short-side light shielding portion 32a blocks light from entering the short-side main body portion 31a from the light guide plate 21. Therefore, even if the short-side main body 31a of the spacer 30 has translucency and the refractive index is larger than air, the liquid crystal panel 10 or the optical sheets 23a, 23b, The incidence of light on 23c and 23d is prevented.
  • the long-side main body portions 31b and 31b are formed of a light-shielding material, light is prevented from entering the liquid crystal panel 10 or the optical sheets 23a, 23b, 23c, and 23d.
  • the display device 1 can maintain the display quality, and can diversify the design by expanding the range of material selection.
  • Display device 10 Liquid crystal panel (display panel) 21 Light guide plate 23a, 23b, 23c, 23d Optical sheet 30 Spacer 31 Main body part 32 Light-shielding part

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal (AREA)

Abstract

Provided is a display device which is capable of maintaining display quality. A wide surface of a light guide plate 21 is provided with a spacer 30, and a liquid crystal panel 10 is connected to the light guide plate 21 via the spacer 30. The spacer 30 is firmly bonded to the edge portion of the back surface of the liquid crystal panel 10 and to the edge portion of the wide surface of the light guide plate 21. The spacer 30 comprises a rectangular frame-like main body part 31 that is firmly bonded to the liquid crystal panel 10 and a rectangular frame-like light blocking part 32 that is firmly bonded to the light guide plate 21, said rectangular frame-like parts being arranged in the facing direction of the liquid crystal panel 10 and the light guide plate 21. The main body part 31 is formed from a UV curable resin. The light blocking part 32 is black, and is formed by application such as dropping or coating of a moisture curable resin, by printing of a pigment, by metal vapor deposition or the like.

Description

表示装置Display device
　本発明は、画像を表示する表示装置に関する。 The present invention relates to a display device that displays an image.
　液晶パネルを画像表示部として備える表示装置は、液晶パネルの背面側にバックライトを配し、該バックライトからの照射光を液晶パネルにより変調して透過させ、液晶パネルの正面に画像を表示するように構成されている。バックライトは、直下型とエッジライト型とに大別されるが、近年においては、消費電力の低減及び薄型化の観点からエッジライト型のバックライトが広く採用されている。 A display device including a liquid crystal panel as an image display unit includes a backlight on the back side of the liquid crystal panel, modulates and transmits the light emitted from the backlight by the liquid crystal panel, and displays an image on the front of the liquid crystal panel. It is configured as follows. Backlights are roughly classified into direct type and edge light type. In recent years, edge light type backlights are widely used from the viewpoint of reducing power consumption and reducing the thickness.
　エッジライト型のバックライトは、浅底箱型をなすバックライトシャーシ内に収容された導光板及び光源とを備える。導光板は、ガラス又は透光性を有する樹脂材料製の平板であり、バックライトシャーシの底板上に載置されている。光源は、バックライトシャーシの一側壁に取り付け、導光板の一側面に対向させてある。 Edge light type backlight includes a light guide plate and a light source housed in a backlight chassis having a shallow box shape. The light guide plate is a flat plate made of glass or a resin material having translucency, and is placed on the bottom plate of the backlight chassis. The light source is attached to one side wall of the backlight chassis and is opposed to one side surface of the light guide plate.
　光源からの光は、導光板の一側面に入射し、空気及び導光板の屈折率の差により全反射を繰り返して導光板内を進行する。導光板内を進行する光は、導光板に設けられたドットパターンにより反射、散乱し、バックライトシャーシの開口側に露出する導光板の一広面全体に分布して出射される。 The light from the light source is incident on one side of the light guide plate and travels through the light guide plate by repeating total reflection due to the difference in refractive index between air and the light guide plate. The light traveling in the light guide plate is reflected and scattered by the dot pattern provided on the light guide plate, and is distributed and emitted over the entire wide surface of the light guide plate exposed to the opening side of the backlight chassis.
　表示装置は、導光板の一広面を液晶パネルの背面に対向させ、対向面間に光学シートを介装して構成されている。光学シートは、光の拡散、集光作用をなす光学要素であり、導光板からの出射光は、光学シートを経て液晶パネルに照射される。 The display device is configured such that a wide surface of the light guide plate is opposed to the back surface of the liquid crystal panel, and an optical sheet is interposed between the opposed surfaces. The optical sheet is an optical element that functions to diffuse and collect light, and light emitted from the light guide plate is irradiated onto the liquid crystal panel through the optical sheet.
　導光板及び液晶パネルの間にスペーサを配し、光学シートを介装する空間を確保した表示装置が従来提案されている。例えば、特許文献１に記載の表示装置（表示モジュール）においては、導光板と液晶パネルとは、夫々の周縁部に設けた枠状のスペーサにより適宜の間隔を隔てて対向させてあり、光学シートはスペーサの内側空間に配置されている。 Conventionally, a display device has been proposed in which a spacer is provided between the light guide plate and the liquid crystal panel and a space for interposing the optical sheet is secured. For example, in the display device (display module) described in Patent Document 1, the light guide plate and the liquid crystal panel are opposed to each other with an appropriate interval by a frame-like spacer provided on each peripheral portion, and an optical sheet Is disposed in the inner space of the spacer.
　スペーサは、光学シートを介装する空間を確保し、かつ、導光板及び液晶パネルを結合する場合がある。この場合に、導光板及び液晶パネルの結合の簡便性及び強度の観点から、スペーサの材料としてＵＶ硬化性又は湿気硬化性等の樹脂が挙げられる。 The spacer may secure a space for interposing the optical sheet and may couple the light guide plate and the liquid crystal panel. In this case, from the viewpoint of ease of coupling and strength of the light guide plate and the liquid crystal panel, examples of the spacer material include UV curable or moisture curable resins.
特開２００７－２３２８０９号公報JP 2007-232809 A
　しかしながら、樹脂の性質は様々であり、導光板及び液晶パネルの結合の簡便性及び強度の観点から好ましい樹脂が、透光性を有し、且つ屈折率が空気よりも大きい場合がある。この場合、導光板から出射した光が、導光板及びスペーサの結合部分からスペーサを介して液晶パネル又は光学シートへ入射する可能性がある。意図しない光の入射による輝度むらの制御は困難であり、また、使用者が画面を斜視した場合に意図しない光の出射が顕著に確認され、表示装置の表示品質が低下する。 However, the properties of the resin are various, and a resin that is preferable from the viewpoint of simplicity and strength of coupling between the light guide plate and the liquid crystal panel may have translucency and a refractive index higher than air. In this case, the light emitted from the light guide plate may enter the liquid crystal panel or the optical sheet through the spacer from the coupling portion of the light guide plate and the spacer. It is difficult to control luminance unevenness due to unintended light incidence, and unintentional light emission is remarkably confirmed when the user squints the screen, and the display quality of the display device deteriorates.
　本発明は、斯かる事情に鑑みてなされたものであり、その目的とするところは、表示品質を保つことができる表示装置を提供することにある。 The present invention has been made in view of such circumstances, and an object thereof is to provide a display device capable of maintaining display quality.
　本発明に係る表示装置は、一面に画像を表示する表示パネルと、該表示パネルの他面に対向配置された導光板と、前記表示パネル及び導光板の間に介装された光学シートと、前記表示パネル及び導光板の間に位置し、該光学シートを介装するための空間を確保するスペーサとを備える表示装置において、前記スペーサは、前記表示パネルに固着された本体部と、前記導光板及び本体部に固着され、前記導光板からの前記本体部への入光を遮る遮光部とを有することを特徴とする。 A display device according to the present invention includes a display panel for displaying an image on one surface, a light guide plate disposed opposite to the other surface of the display panel, an optical sheet interposed between the display panel and the light guide plate, In a display device comprising a spacer positioned between the display panel and the light guide plate and securing a space for interposing the optical sheet, the spacer includes a main body fixed to the display panel, the light guide plate, And a light-shielding portion that is fixed to the main body and blocks light incident on the main body from the light guide plate.
　本発明によれば、遮光部が導光板からの本体部への光の入射を遮る。したがって、スペーサの本体部が透光性を有する場合であっても、本体部を介する液晶パネル又は光学シートへの光の入射が防止され、表示品質が保たれる。 According to the present invention, the light blocking portion blocks light from entering the main body from the light guide plate. Therefore, even when the main body portion of the spacer has translucency, light is prevented from entering the liquid crystal panel or the optical sheet via the main body portion, and display quality is maintained.
　本発明に係る表示装置は、前記本体部は、ＵＶ硬化性の樹脂からなることを特徴とする。 The display device according to the present invention is characterized in that the main body portion is made of a UV curable resin.
　本発明によれば、ＵＶ硬化性の樹脂を用いることで簡単に本体部を形成することができる。 According to the present invention, the main body can be easily formed by using a UV curable resin.
　本発明に係る表示装置は、前記遮光部は黒色であることを特徴とする。 The display device according to the present invention is characterized in that the light shielding portion is black.
　本発明によれば、遮光部が黒色であるので、より確実に光の本体部への入射を遮ることができる。 According to the present invention, since the light shielding portion is black, it is possible to more reliably block light from entering the main body portion.
　本発明に係る表示装置は、前記本体部は、枠状をなし、前記遮光部は、前記本体部の一部又は全部に沿って配され、幅寸法が前記本体部の幅寸法以上であることを特徴とする。 In the display device according to the present invention, the main body portion has a frame shape, the light shielding portion is arranged along a part or all of the main body portion, and a width dimension is equal to or larger than a width dimension of the main body portion. It is characterized by.
　本発明によれば、遮光部は、より確実に光の本体部への入射を遮ることができ、本体部及び導光板に強固に固着される。 According to the present invention, the light shielding portion can more reliably block the light from entering the main body portion, and is firmly fixed to the main body portion and the light guide plate.
　本発明によれば、表示品質を保つことができる。 According to the present invention, display quality can be maintained.
表示装置の要部を示す断面図である。It is sectional drawing which shows the principal part of a display apparatus. 図１のＩＩ－ＩＩ線による断面図である。FIG. 2 is a cross-sectional view taken along line II-II in FIG. スペーサの構造を示す側面図である。It is a side view which shows the structure of a spacer. 変形例に係る遮光部を示す断面図である。It is sectional drawing which shows the light-shielding part which concerns on a modification.
　以下、本発明を実施の形態に係る表示装置を示す図面に基づいて詳述する。図１は、表示装置１の要部を示す断面図である。表示装置１は、液晶パネル１０と、ベゼル１１と、バックライトシャーシ１２と、バックライト２０とを備える。 Hereinafter, the present invention will be described in detail with reference to the drawings illustrating a display device according to an embodiment. FIG. 1 is a cross-sectional view showing a main part of the display device 1. The display device 1 includes a liquid crystal panel 10, a bezel 11, a backlight chassis 12, and a backlight 20.
　液晶パネル１０は、矩形状をなし、画像を表示する表示面１０ａが正面をなす。また、バックライトシャーシ１２は、液晶パネル１０の背面側に配されており、液晶パネル１０に対向する矩形状の底板１２ａと、該底板の四辺から液晶パネル１０側に向けて垂直に立ち上がる側板１２ｂとを有し、正面側が開口した浅底箱型をなす。 The liquid crystal panel 10 has a rectangular shape, and the display surface 10a for displaying an image is the front. The backlight chassis 12 is disposed on the back side of the liquid crystal panel 10, and has a rectangular bottom plate 12a facing the liquid crystal panel 10, and a side plate 12b that rises vertically from the four sides of the bottom plate toward the liquid crystal panel 10 side. And has a shallow box shape with an open front side.
　バックライト２０は、バックライトシャーシ１２に収容された矩形状の導光板２１と該導光板２１の一側面に対向する複数の光源４１，４１・・・とを備える。導光板２１は、ガラス又は透光性を有する樹脂材料製の平板であり、一広面と、光の散乱のためのドットパターンが設けられた他広面とを有する。 The backlight 20 includes a rectangular light guide plate 21 housed in the backlight chassis 12 and a plurality of light sources 41, 41... Facing one side surface of the light guide plate 21. The light guide plate 21 is a flat plate made of glass or a resin material having translucency, and has one wide surface and another wide surface provided with a dot pattern for scattering light.
　導光板２１は、反射シート２２を介してバックライトシャーシ１２の底板１２ａ上に載置されている。導光板２１の他広面は、反射シート２２に当接させてある。また、光源４１，４１・・・は、導光板２１の一側面に対応するバックライトシャーシ１２の側板１２ｂの一側壁に取り付けられた基板４０に並設されている。 The light guide plate 21 is placed on the bottom plate 12 a of the backlight chassis 12 via the reflection sheet 22. The other wide surface of the light guide plate 21 is in contact with the reflection sheet 22. Further, the light sources 41, 41... Are arranged side by side on the substrate 40 attached to one side wall of the side plate 12 b of the backlight chassis 12 corresponding to one side surface of the light guide plate 21.
　導光板２１の一広面にはスペーサ３０が設けられ、該スペーサ３０を介して導光板２１に液晶パネル１０が結合している。スペーサ３０は、液晶パネル１０の背面の縁部及び導光板２１の一広面の縁部に固着されている。 A spacer 30 is provided on one wide surface of the light guide plate 21, and the liquid crystal panel 10 is coupled to the light guide plate 21 through the spacer 30. The spacer 30 is fixed to the edge of the back surface of the liquid crystal panel 10 and the edge of the wide surface of the light guide plate 21.
　また、導光板２１の一広面には、光の拡散、集光作用をなす四枚の光学シート２３ａ，２３ｂ，２３ｃ，２３ｄが配されている。光学シート２３ａ，２３ｂ，２３ｃ，２３ｄは、液晶パネル１０及び導光板２１の対向方向に順に重なるように配され、光学シート２３ｄが最も液晶パネル１０の近くに配されている。 Further, four optical sheets 23a, 23b, 23c, and 23d that perform light diffusion and light condensing functions are disposed on one wide surface of the light guide plate 21. The optical sheets 23 a, 23 b, 23 c, and 23 d are arranged so as to overlap in order in the facing direction of the liquid crystal panel 10 and the light guide plate 21, and the optical sheet 23 d is arranged closest to the liquid crystal panel 10.
　スペーサ３０により、液晶パネル１０及び導光板２１間に、光学シート２３ａ，２３ｂ，２３ｃ，２３ｄが介装される空間が確保されている。 Spaces for interposing the optical sheets 23a, 23b, 23c, and 23d are secured between the liquid crystal panel 10 and the light guide plate 21 by the spacer 30.
　ベゼル１１は、液晶パネル１０の正面側に位置する矩形額縁状のフレーム１１ａと、該フレーム１１ａの外周をなす四辺からバックライトシャーシ１２側に向けて垂直に立ち上がる側板１１ｂとを有する。 The bezel 11 includes a rectangular frame-shaped frame 11a located on the front side of the liquid crystal panel 10, and a side plate 11b that rises vertically from the four sides forming the outer periphery of the frame 11a toward the backlight chassis 12 side.
　ベゼル１１は、側板１１ｂがバックライトシャーシ１２の側板１２ｂが当接するように液晶パネル１０に正面から被せられている。液晶パネル１０の表示面１０ａの周縁部は、緩衝材１３を介してベゼル１１のフレーム１１ａに覆われている。 The bezel 11 covers the liquid crystal panel 10 from the front so that the side plate 11b contacts the side plate 12b of the backlight chassis 12. The peripheral edge of the display surface 10 a of the liquid crystal panel 10 is covered with the frame 11 a of the bezel 11 with the buffer material 13 interposed therebetween.
　図２は、図１のＩＩ－ＩＩ線による断面図であり、図３は、スペーサ３０の構造を示す側面図である。光学シート２３ａ，２３ｂ，２３ｃ，２３ｄは、矩形状をなし、二本の長辺夫々の中央部にて、面に平行な方向の凸部が設けられている。光学シート２３ａ，２３ｂ，２３ｃ，２３ｄは、導光板２１の一広面に凸部を揃えて配されている。 2 is a cross-sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a side view showing the structure of the spacer 30. As shown in FIG. The optical sheets 23a, 23b, 23c, and 23d have a rectangular shape, and are provided with a convex portion in a direction parallel to the surface at the center of each of the two long sides. The optical sheets 23 a, 23 b, 23 c, and 23 d are arranged with a convex portion on the wide surface of the light guide plate 21.
　図２に示すように、スペーサ３０は、矩形枠状をなし、導光板２１の一広面の縁部にて、導光板２１の四辺に沿って形成されている。スペーサ３０は、二本の短辺側スペーサ３０ａ，３０ａ及び二本の長辺側スペーサ３０ｂ，３０ｂを有する。 As shown in FIG. 2, the spacer 30 has a rectangular frame shape, and is formed along the four sides of the light guide plate 21 at the edge of the wide surface of the light guide plate 21. The spacer 30 has two short side spacers 30a and 30a and two long side spacers 30b and 30b.
　長辺側スペーサ３０ｂは、長さ方向の中央で分離しており、分離した部分において対向する端部は夫々導光板２１の外側方向に曲折している。長辺側スペーサ３０ｂには、対向する前記端部により、空隙が形成されている。 The long side spacers 30b are separated at the center in the length direction, and the opposite ends of the separated portions are bent outwardly of the light guide plate 21, respectively. A gap is formed in the long side spacer 30b by the opposed end portions.
　光学シート２３ａ，２３ｂ，２３ｃ，２３ｄは、スペーサ３０の内側空間に配されている。また、光学シート２３ａ，２３ｂ，２３ｃ，２３ｄの夫々の凸部は、長辺側スペーサ３０ｂの空隙に挿入されている。 The optical sheets 23 a, 23 b, 23 c, and 23 d are arranged in the inner space of the spacer 30. Further, the respective convex portions of the optical sheets 23a, 23b, 23c, and 23d are inserted into the gaps of the long side spacer 30b.
　スペーサ３０は、液晶パネル１０及び導光板２１の対向方向に並ぶように、液晶パネル１０に固着された矩形枠状の本体部３１及び導光板２１に固着された矩形枠状の遮光部３２を有する。 The spacer 30 includes a rectangular frame-shaped main body portion 31 fixed to the liquid crystal panel 10 and a rectangular frame-shaped light shielding portion 32 fixed to the light guide plate 21 so as to be aligned in the opposing direction of the liquid crystal panel 10 and the light guide plate 21. .
　本体部３１は、ＵＶ硬化性の樹脂から形成されており、前記遮光部３２に固着された矩形枠状の空間保持層３３と液晶パネル１０に固着された矩形枠状の固着層３４とを有する。固着層３４は、空間保持層３３よりも薄く、固着層３４及び空間保持層３３は互いに固着されている。 The main body 31 is made of a UV curable resin, and has a rectangular frame-shaped space holding layer 33 fixed to the light shielding portion 32 and a rectangular frame-shaped fixed layer 34 fixed to the liquid crystal panel 10. . The fixing layer 34 is thinner than the space holding layer 33, and the fixing layer 34 and the space holding layer 33 are fixed to each other.
　遮光部３２及び空間保持層３３の厚さの合計は、光学シート２３ａ，２３ｂ，２３ｃ，２３ｄの厚さの合計よりも厚い。これにより、遮光部３２及び空間保持層３３は、光学シート２３ａ，２３ｂ，２３ｃ，２３ｄが介装される空間を確保している。 The total thickness of the light shielding portion 32 and the space holding layer 33 is thicker than the total thickness of the optical sheets 23a, 23b, 23c, and 23d. Thereby, the light-shielding part 32 and the space holding layer 33 ensure the space in which the optical sheets 23a, 23b, 23c, and 23d are interposed.
　本体部３１は、短辺側スペーサ３０ａ，３０ａに対応する部分に短辺側本体部３１ａ，３１ａを有し、長辺側スペーサ３０ｂ，３０ｂに対応する部分に長辺側本体部３１ｂ，３１ｂを有する。 The main body 31 has short-side body portions 31a and 31a at portions corresponding to the short-side spacers 30a and 30a, and the long- side body portions 31b and 31b at portions corresponding to the long- side spacers 30b and 30b. Have.
　同様に、空間保持層３３は、短辺側空間保持層３３ａ，３３ａ及び長辺側空間保持層３３ｂ，３３ｂを有し、固着層３４は、短辺側固着層３４ａ，３４ａ及び長辺側固着層３４ｂ，３４ｂを有する。 Similarly, the space holding layer 33 includes short side space holding layers 33a and 33a and long side space holding layers 33b and 33b, and the fixing layer 34 includes the short side fixing layers 34a and 34a and the long side fixing. It has layers 34b and 34b.
　また、遮光部３２は、短辺側スペーサ３０ａ，３０ａに対応する部分に短辺側遮光部３２ａ，３２ａを有し、長辺側スペーサ３０ｂ，３０ｂに対応する部分に長辺側遮光部３２ｂ，３２ｂを有する。 The light shielding portion 32 includes short side light shielding portions 32a and 32a at portions corresponding to the short side spacers 30a and 30a, and long side light shielding portions 32b and 32b at portions corresponding to the long side spacers 30b and 30b. 32b.
　遮光部３２は、黒色であり、湿気硬化性の樹脂の滴下又は塗布などによる塗装、顔料の印刷、金属蒸着等により形成される。また、短辺側遮光部３２ａ及び長辺側遮光部３２ｂの幅寸法は、夫々短辺側本体部３１ａ及び長辺側本体部３１ｂの幅寸法以上である。即ち、遮光部３２の幅寸法は本体部３１の幅寸法以上である。 The light-shielding part 32 is black and is formed by coating with drip or application of moisture curable resin, printing of pigment, metal vapor deposition, or the like. Moreover, the width dimension of the short side light-shielding part 32a and the long side light-shielding part 32b is equal to or larger than the width dimension of the short side body part 31a and the long side body part 31b, respectively. That is, the width dimension of the light shielding part 32 is equal to or larger than the width dimension of the main body part 31.
　以下、表示装置１の動作を説明する。光源４１から照射された光は、導光板２１の一側面から入射し、空気及び導光板の屈折率の差により全反射を繰り返して導光板２１内を進行する。導光板２１内を進行する光は、導光板２１の他広面に設けられたドットパターンにより反射、散乱し、一広面全体に分布して出射する。 Hereinafter, the operation of the display device 1 will be described. The light emitted from the light source 41 is incident from one side of the light guide plate 21 and travels through the light guide plate 21 by repeating total reflection due to the difference in refractive index between air and the light guide plate. The light traveling in the light guide plate 21 is reflected and scattered by the dot pattern provided on the other wide surface of the light guide plate 21 and is distributed and emitted over the entire wide surface.
　導光板２１から出射した光は、光学シート２３ａ，２３ｂ，２３ｃ，２３ｄによる拡散、集光を経て液晶パネル１０により変調されて透過し、表示面１０ａに画像を表示する。 The light emitted from the light guide plate 21 is modulated and transmitted by the liquid crystal panel 10 after being diffused and condensed by the optical sheets 23a, 23b, 23c, and 23d, and displays an image on the display surface 10a.
　以上のように構成された表示装置１は遮光部３２が導光板２１からの本体部３１への光の入射を遮る。したがって、スペーサ３０の本体部３１が透光性を有し、屈折率が空気よりも大きい場合であっても、本体部３１を介する液晶パネル１０又は光学シート２３ａ，２３ｂ，２３ｃ，２３ｄへの光の入射を防止することができ、液晶パネル１０の表示品質が保たれる。 In the display device 1 configured as described above, the light shielding portion 32 blocks light from entering the main body portion 31 from the light guide plate 21. Therefore, even when the main body 31 of the spacer 30 has translucency and the refractive index is larger than that of air, the light to the liquid crystal panel 10 or the optical sheets 23a, 23b, 23c, and 23d via the main body 31 is obtained. Can be prevented, and the display quality of the liquid crystal panel 10 is maintained.
　また、ＵＶ硬化性樹脂を用いることで簡単に本体部３１を形成することができる。遮光部３２が黒色であるので、より確実に本体部３１への光の入射を遮ることができる。更に遮光部３２の幅寸法が本体部３１の幅寸法以上であるので、より確実に本体部３１への光の入射を遮ることができる。また、遮光部３２は、本体部３１及び導光板２１に強固に固着される。 Moreover, the main body 31 can be easily formed by using a UV curable resin. Since the light shielding portion 32 is black, it is possible to more reliably block light from entering the main body portion 31. Furthermore, since the width dimension of the light shielding part 32 is equal to or larger than the width dimension of the main body part 31, it is possible to more reliably block light from entering the main body part 31. The light shielding part 32 is firmly fixed to the main body part 31 and the light guide plate 21.
　なお、スペーサ３０の本体部３１はＵＶ硬化性の樹脂により形成する構成でなく、湿気硬化性の樹脂又はホットメルト系の樹脂により形成する構成であってもよい。また、光学シート２３ａ，２３ｂ，２３ｃ，２３ｄは、夫々凸部を設けない構成であってもよい。 The main body 31 of the spacer 30 may not be formed of a UV curable resin, but may be formed of a moisture curable resin or a hot melt resin. Further, the optical sheets 23a, 23b, 23c, and 23d may have a configuration in which no convex portion is provided.
（変形例）
　以下、変形例に係る表示装置１についてその実施の形態を示す図面に基づいて詳述する。図４は、変形例に係る遮光部３２を示す断面図である。遮光部３２は、短辺側遮光部３２ａ，３２ａを有し、長辺側遮光部３２ｂ，３２ｂを有しない。また、短辺側本体部３１ａ，３１ａは、ＵＶ硬化性の樹脂により形成されており、長辺側本体部３１ｂ，３１ｂは、遮光性を有する材料により形成されている。 (Modification)
Hereinafter, the display device 1 according to the modification will be described in detail with reference to the drawings illustrating embodiments thereof. FIG. 4 is a cross-sectional view showing a light shielding part 32 according to a modification. The light shielding part 32 has short side light shielding parts 32a and 32a, and does not have long side light shielding parts 32b and 32b. The short side body parts 31a and 31a are made of a UV curable resin, and the long side body parts 31b and 31b are made of a light-shielding material.
　この場合、短辺側遮光部３２ａが導光板２１からの短辺側本体部３１ａへの光の入射を遮る。したがって、スペーサ３０の短辺側本体部３１ａが透光性を有し、屈折率が空気よりも大きい場合であっても、短辺側本体部３１ａを介する液晶パネル１０又は光学シート２３ａ，２３ｂ，２３ｃ，２３ｄへの光の入射が防止される。 In this case, the short-side light shielding portion 32a blocks light from entering the short-side main body portion 31a from the light guide plate 21. Therefore, even if the short-side main body 31a of the spacer 30 has translucency and the refractive index is larger than air, the liquid crystal panel 10 or the optical sheets 23a, 23b, The incidence of light on 23c and 23d is prevented.
　一方で、長辺側本体部３１ｂ，３１ｂは遮光性を有する材料により形成されているので、液晶パネル１０又は光学シート２３ａ，２３ｂ，２３ｃ，２３ｄへの光の入射は防止されている。 On the other hand, since the long-side main body portions 31b and 31b are formed of a light-shielding material, light is prevented from entering the liquid crystal panel 10 or the optical sheets 23a, 23b, 23c, and 23d.
　以上の構成によれば、表示装置１は、表示品質が保つことができ、また材料選択の幅を広げて設計の多様化を図ることができる。 According to the above configuration, the display device 1 can maintain the display quality, and can diversify the design by expanding the range of material selection.
　今回開示された実施の形態はすべての点で例示であって、制限的なものではないと考えられるべきである。本発明の範囲は、上記した意味ではなく、請求の範囲によって示され、請求の範囲と均等の意味及び範囲内でのすべての変更が含まれることが意図される。即ち、請求項に示した範囲で適宜変更した技術的手段を組み合わせて得られる実施形態も本発明の技術的範囲に含まれる。 It should be considered that the embodiment disclosed this time is illustrative in all respects and not restrictive. The scope of the present invention is defined not by the above-described meaning but by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims. That is, embodiments obtained by combining technical means appropriately changed within the scope of the claims are also included in the technical scope of the present invention.
１　表示装置
１０　液晶パネル（表示パネル）
２１　導光板
２３ａ，２３ｂ，２３ｃ，２３ｄ　光学シート
３０　スペーサ
３１　本体部
３２　遮光部 1 Display device 10 Liquid crystal panel (display panel)
21 Light guide plate 23a, 23b, 23c, 23d Optical sheet 30 Spacer 31 Main body part 32 Light-shielding part

Claims (4)

  1. 　一面に画像を表示する表示パネルと、該表示パネルの他面に対向配置された導光板と、前記表示パネル及び導光板の間に介装された光学シートと、前記表示パネル及び導光板の間に位置し、該光学シートを介装するための空間を確保するスペーサとを備える表示装置において、
    　前記スペーサは、
    　前記表示パネルに固着された本体部と、
    　前記導光板及び本体部に固着され、前記導光板からの前記本体部への入光を遮る遮光部とを有すること
    　を特徴とする表示装置。     A display panel for displaying an image on one surface; a light guide plate disposed opposite to the other surface of the display panel; an optical sheet interposed between the display panel and the light guide plate; and a position between the display panel and the light guide plate In a display device comprising a spacer for securing a space for interposing the optical sheet,
    The spacer is
    A main body fixed to the display panel;
    A display device, comprising: a light-shielding portion fixed to the light guide plate and the main body portion and blocking light incident on the main body portion from the light guide plate.
  2. 　前記本体部は、ＵＶ硬化性の樹脂からなることを特徴とする請求項１に記載の表示装置。 The display device according to claim 1, wherein the main body portion is made of a UV curable resin.
  3. 　前記遮光部は黒色であることを特徴とする請求項１又は２に記載の表示装置。 The display device according to claim 1, wherein the light shielding portion is black.
  4. 　前記本体部は、枠状をなし、
    　前記遮光部は、前記本体部の一部又は全部に沿って配され、幅寸法が前記本体部の幅寸法以上であることを特徴とする請求項１から３までのいずれか一つに記載の表示装置。     The main body has a frame shape,
    The said light-shielding part is distribute | arranged along the one part or all part of the said main-body part, and the width dimension is more than the width dimension of the said main-body part, The Claim 1 characterized by the above-mentioned. Display device.
PCT/JP2015/053526 2015-02-09 2015-02-09 Display device WO2016129037A1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003315792A (en) * 2002-04-24 2003-11-06 Nec Lcd Technologies Ltd Liquid crystal display
JP2014228862A (en) * 2013-05-27 2014-12-08 エルジー ディスプレイ カンパニー リミテッド Display device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003315792A (en) * 2002-04-24 2003-11-06 Nec Lcd Technologies Ltd Liquid crystal display
JP2014228862A (en) * 2013-05-27 2014-12-08 エルジー ディスプレイ カンパニー リミテッド Display device

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