CN109791321A - 显示装置 - Google Patents

显示装置 Download PDF

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Publication number
CN109791321A
CN109791321A CN201780057904.XA CN201780057904A CN109791321A CN 109791321 A CN109791321 A CN 109791321A CN 201780057904 A CN201780057904 A CN 201780057904A CN 109791321 A CN109791321 A CN 109791321A
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CN
China
Prior art keywords
mentioned
display
display device
optical devices
light
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Pending
Application number
CN201780057904.XA
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English (en)
Inventor
甲田一纯
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Denso Corp
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Denso Corp
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Publication date
Application filed by Denso Corp filed Critical Denso Corp
Publication of CN109791321A publication Critical patent/CN109791321A/zh
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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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
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    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
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    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051—Diffusing sheet or layer
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    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Marketing (AREA)
  • Accounting & Taxation (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)
  • Instrument Panels (AREA)

Abstract

显示装置(1)具备：显示器(3)，在显示面(31)显示图像；盖板(2)，通过透明粘合剂(4)贴合在上述显示器的上述显示面一侧，并具有能够视觉确认上述显示面的透光部(22)；光学装置(5)，以与上述显示器之间存在缝隙(11)的方式配置于上述显示器的背后，向上述显示器的背面供给用于上述显示器的显示的光；第一支承部(7)，支承上述光学装置；第二支承部(6)，支承上述盖板；缓冲材料(12)，以与上述显示器及上述光学装置双方接触的方式设置于上述缝隙。

Description

显示装置
相关申请的交叉引用
本申请主张于2016年9月23日提出的日本专利申请编号2016－185184号的优先权，并在此引用其记载内容。
技术领域
本发明涉及显示装置，详细地涉及在显示器的显示面一侧通过透明粘合剂贴合有盖板的显示装置。
背景技术
以往，已知有这样的显示装置，即：在液晶显示器等显示器的显示面一侧设置有盖板，这些显示器与盖板通过透明粘合剂贴合(例如参照专利文献1)。
专利文献1：日本特开2015－148718号公报
发明内容
然而，在显示器与设置于该显示器的背后且向显示器的背面供给光的光学装置构成为分别独立的单元，在盖板及光学装置被显示器以外的支承部件支承的显示装置中，需要在显示器的背面与光学装置的表面之间设置吸收高度方向的公差的缝隙。但是，由于该缝隙而成为显示器悬挂在盖板上的状态，通过显示器的自重而对透明粘合剂施加应力，结果，可能导致显示器的剥离、显示器的显示失真等不良情况。
本公开的课题在于提供一种显示装置，在该显示装置中，盖板通过透明粘合剂贴合在显示器的显示面一侧，在显示器与光学装置之间具有缝隙，根据该显示装置，能够缓和通过显示器的自重施加给透明粘合剂的应力。
本公开的一方式所涉及的显示装置具备：显示器，在显示面显示图像；盖板，通过透明粘合剂贴合在显示器的显示面一侧，具有能够使得视觉确认显示面的透光部；光学装置，以与显示器之间存在缝隙的方式配置于显示器的背后，向显示器的背面供给用于显示器的显示的光；第一支承部，支承光学装置；第二支承部，支承盖板；以及缓冲材料，以与显示器及光学装置双方接触的方式设置于缝隙。
由此，因为在显示器与光学装置之间的缝隙设置有缓冲材料，所以能够缓和通过显示器的自重施加给透明粘合剂的应力。另外，即使缝隙的大小因高度方向的公差而改变，也能够通过缓冲材料吸收该缝隙的变化，所以可以不对缓冲材料的厚度进行微调，结果，能够容易地组装显示器和光学装置。
附图说明
通过参照附图对本发明进行的以下的详细描述，本公开的上述目的以及其他的目的、特征、优点会变得更加清楚。该附图为，
图1是显示装置的剖视图。
图2是显示装置的俯视图。
图3是比较例1的显示装置的剖视图。
图4是比较例2的显示装置的剖视图。
具体实施方式
以下，参照附图对本公开的实施方式进行说明。图1所示的显示装置1例如安装于车辆的仪表面板中的与驾驶席相向的位置，构成显示车速、发动机转数等各种车辆信息的组合仪表。
显示装置1具备文字板2、显示器3、光学装置5、上壳体6、电路基板7、屏蔽部件8、下壳体9、以及缓冲材料12。
文字板2是构成显示装置1的显示部的部件，能够视觉确认其表面。文字板2是透明树脂制，详细而言是聚碳酸酯制。另外，文字板2形成为平板状。在文字板2的表面或者背面形成有遮光部21及未设置该遮光部21的透光部22。遮光部21例如通过打印形成。透光部22为显示装置1的显示部。透光部22形成为在与显示器3的显示面31相向的位置处覆盖整个显示面31的形状。能够通过透光部22视觉确认显示面31。
此外，在与显示器3相向的位置以外的位置也形成有透光部。在将与显示器3相向的位置以外的透光部作为其他透光部时，其他透光部构成显示装置1的除显示器3的显示以外的显示部，例如是用指针指示车速、发动机转数等指针式仪表的刻度，或是转向信号灯的点亮部。
文字板2被上壳体6支承。详细而言，在上壳体6形成有载置部61，在该载置部61载置有文字板2的一部分(不与显示器3重叠的部分)。而且，被另一部件从其上方按压(未图示)。换句话说，文字板2被载置部61和另一部件夹持，从而限制了文字板2的垂直的方向的位移。此外，文字板2相当于本公开的盖板。
显示器3是利用液晶在显示面31显示各种图像的液晶显示器。显示器3例如在进行警告未佩戴安全带的显示，或者在车辆安装有巡航控制的情况下进行与巡航控制有关的显示，或者在车辆安装有导航装置的情况下进行与导航有关的显示(例如在下个交叉点处的行进方向等)。
显示器3及文字板2平行地配置在文字板2的背后。详细而言，显示器3是作为开关元件内置有薄膜晶体管(TFT)的有源矩阵方式的液晶显示器，具备2张透明的玻璃基板、配置于这2张玻璃基板之间的液晶层、配置于玻璃基板的外侧的偏光板等。在玻璃基板排列有彩色滤光片、TFT等。显示器3在俯视时例如形成为长方形的平板状。通过液晶层被控制，从而从光学装置5供给的光向显示面31的射出被控制，由此显示器3显示各种图像。
另外，显示器3构成为与光学装置5分离的单元。换句话说，显示器3及光学装置5在组装于上壳体6及电路基板7之前分别独立。
显示器3通过作为光学粘合剂的透明粘合剂4贴合在文字板2。换句话说，在显示器3的显示面31与文字板2的背面之间夹有透明粘合剂4。透明粘合剂4是光学部件专用的丙烯酸基、硅基等透明粘合剂。在本实施方式中，透明粘合剂4是片状的OCA(Optical ClearAdhesive：光学透明胶)，但也可以是液状的UV固化树脂(OCR：Optical Clear Resin：光学透明树脂)。
这样，通过在显示器3上配置文字板2，与露出显示器3的情况相比，能够保护显示器3，另外，能够提高显示装置1的外观。并且，由于显示器3与文字板2通过透明粘合剂4贴合，从而在显示器3与文字板2之间没有空气层，由此，能够抑制由外部光的表面反射引起的可视性的恶化。
光学装置5配置在显示器3的背后且在与显示器3之间存在用于吸收高度方向的公差的缝隙11。光学装置5是向显示器3的背面供给用于显示器3的显示的光的背光灯。
光学装置5具备：导光板51，配置为覆盖显示器3的整个背面且由丙烯酸等形成；多个LED52，将光入射到该导光板51的侧边缘；白色框架53，以覆盖导光板51的侧面及背面的形状设置，用于在导光板51的端面提高向导光板51内反射的反射效率来提高亮度；扩散板54，设置为覆盖导光板51的表面(光出射面)，用于使从表面射出的光扩散来使光从表面均匀地射出；圆柱突起部55，从白色框架53向背后方向延伸设置至电路基板7的位置；保护框架56，以覆盖白色框架53的侧面及背面的形状设置，收容保护导光板51、LED52以及扩散板54；以及边框57，沿光学装置5的外周以环状设置。
该保护框架56及边框57具有长方形的形状，在保护框架56的外周围具有向显示器3方向竖起的壁561。另外，在边框57的外周围具有向电路基板7方向竖起的侧面部571及从该侧面部571向内侧方向伸出的表面部572。
保护框架56与边框57以使边框57的侧面部571位于保护框架56的壁561的外侧的方式重合，两者成为一体以使通过一体成型在保护框架56的壁561的适当的位置形成的爪(未图示)卡止在边框57的侧面部571的内侧而不能偏离。
在圆柱突起部55形成有在前端形成开口的螺纹孔551。在螺纹孔551的内壁形成有螺纹槽。
光学装置5通过使从LED52向导光板51内入射的光从在表面部572的内侧形成的开口射出，进行面发光。该面发光的光入射到显示器3的背面。
光学装置5通过从电路基板7的与设置有光学装置5的一侧相反的一侧的面亦即背面侧插入的螺钉10紧固于圆柱突起部55的螺纹孔551，从而被电路基板7支承。此外，在多个位置设置有利用圆柱突起部55及螺钉10进行的光学装置5和电路基板7的固定。
另外，光学装置5与显示器3构成为分别独立的单元。即，光学装置5和显示器3在组装于显示装置1之前作为单独部件准备。另外，光学装置5与显示器3在组装于显示装置1的状态下仅通过缓冲材料12直接连接，即，在缓冲材料12以外未设置将光学装置5与显示器3直接连接的部件。
上壳体6是设置为在比电路基板7靠视觉确认者侧围绕电路基板7与文字板2之间的空间，在该空间收容显示器3、光学装置5等的壳体。上壳体6在未图示的位置中，通过爪嵌合、螺钉等与电路基板7一起固定于下壳体9。另外，上壳体6如上述那样在载置部61中支承文字板2。上壳体6也具有作为将来自光学装置5、或安装于电路基板7的光源(未图示)的光反射到内侧的空间的反射器的功能。上壳体6由PP(聚丙烯)树脂、ABS树脂等具有遮光性的树脂形成。此外，上壳体6相当于本公开的第二支承部。
电路基板7是在文字板2以及显示器3的背后与它们平行地配置，且安装各种部件的平板状的基板。具体而言，在电路基板7中，在其表面安装有朝向形成于文字板2的上述的其他透光部发光的光源(未图示)。另外，在电路基板7中，在其背面安装有控制显示器3、光学装置5、光源、指针的旋转等的微机72、使指针旋转驱动的马达(未图示)、向光学装置5供给电源的电源电路73等。
另外，电路基板7是如上述那样支承光学装置5、上壳体6，成为这些部件5、6的定位的基准的部件。换句话说，光学装置5、上壳体6将电路基板7作为基准来定位。
电路基板7固定于下壳体9。详细而言，在电路基板7中，在与光学装置5的圆柱突起部55相向的位置形成有孔71。另外，在下壳体9中在与孔71相向的位置形成有孔91。上述的螺钉10从下壳体9的外侧经由这些孔71、91紧固固定于圆柱突起部55的螺纹孔551，从而光学装置5、电路基板7以及下壳体9相互固定。此外，电路基板7相当于本公开的第一支承部。
屏蔽部件8是设置为覆盖被安装于电路基板7的背面的微机72、电源电路73等各种电子部件，用于阻断从电子部件放射的噪声以及相反从外部混入电子部件的噪声的金属制(铁制、铜制等)的板。屏蔽部件8配置于电路基板7与下壳体9之间的空间，不能通过下壳体9从外部视觉确认。屏蔽部件8通过上述螺钉10以夹在电路基板7的固定部与下壳体9的固定部之间的形状固定。
下壳体9是配置于电路基板7的背后，且背面封闭，在电路基板7侧具有开口的壳体。下壳体9由PP(聚丙烯)树脂、ABS树脂等具有遮光性的树脂形成。在下壳体9的开口载置有电路基板7。下壳体9通过上述螺钉10固定于光学装置5以及电路基板7。
缓冲材料12设置于显示器3与光学装置5之间的缝隙11，详细而言，设置在显示器3的背面的外周部与光学装置5的表面的外周部572(边框57的表面部572)之间，且与显示器3、光学装置5双方接触。此外，显示器3的显示面31的外周部(外周缘)设置于不显示图像的非显示区域，缓冲材料12设置于该显示器3的外周部。缓冲材料12由在将贴合有显示器3的文字板2组装到光学装置5上时，厚度能够根据显示器3的外周部与光学装置5的外周部之间的缝隙变形的材料，换句话说能够吸收该缝隙的缓冲材料形成，具体而言，由橡胶、聚氨酯树脂、发泡制品等形成。
缓冲材料12被以厚度收缩的状态设置，即，与组装前的厚度相比，组装后的厚度较小。另外，缓冲材料12若从组装的状态取下，则厚度扩大。另外，缓冲材料12是从组装前保持恒定的形状的部件，与不保持恒定的形状的液体的粘合剂不同。
缓冲材料12既可以在显示器3以及光学装置5的外周部的整个外周上设置，也可以设置于一部分(例如，在长方形的外周部的情况下设置于相向的2个边)。另外，缓冲材料12的上表面(显示器3一侧的面)以及下表面(光学装置5一侧的面)如两面胶那样为粘合面，通过该粘合面，缓冲材料12与显示器3及光学装置5分别粘合。
在图2示出本实施方式中的缓冲材料12的配置位置。在本实施方式中，缓冲材料12分别独立地配置于俯视时长方形的显示器3以及相同形状的光学装置5的外周部的4个边。此外，在图2也一并显示图1的圆柱突起部55的位置。圆柱突起部55存在4个位置。另外，在图2中，由点划线表示边框57的内周边。
接下来，对显示装置1的组装进行说明。首先，在下壳体9上按顺序载置屏蔽部件8、电路基板7、上壳体6。另外，预先通过透明粘合剂4将文字板2和显示器3贴合。接下来，在光学装置5的表面的外周部或者显示器3的背面的外周部粘贴缓冲材料12。接下来，将贴合有显示器3的文字板2载置在上壳体6上。此时，将缓冲材料12的表面的剥离纸剥下而使粘合面露出。缓冲材料12通过文字板2的组装，以从最初的厚度收缩的状态粘贴于显示器3的外周部以及光学装置5的外周部。最后通过螺钉10等将各部件紧固固定。此外，也可以代替上述，而在组装于电路基板7之前预先使缓冲材料12粘贴于显示器3与光学装置5之间，其后，将文字板2、显示器3、缓冲材料12以及光学装置5的一体品组装到电路基板7以及上壳体6。
接下来，对本实施方式的作用效果进行说明。根据本实施方式，显示器3和光学装置5构成为分别独立的单元，能够吸收将电路基板7作为基准来定位的光学装置5以及上壳体6的尺寸公差的缝隙11形成于显示器3与光学装置5之间。在该缝隙11配置有缓冲材料12，所以能够缓和通过显示器3的自重施加于透明粘合剂4的应力，能够抑制显示器3的剥离、显示失真等不良情况。
另外，缝隙11的大小能够根据将电路基板7作为基准来定位的光学装置5及上壳体6的尺寸公差变化，但缓冲材料12的厚度随缝隙11的大小而变化，所以也可以不对缓冲材料12的厚度进行微调，结果，能够容易地组装显示器3和光学装置5。
另外，在本实施方式中，采用聚碳酸酯制的文字板2作为盖板，所以与玻璃制的盖板相比能够实现轻型化。
与此相对，在图3的比较例1的显示装置中，文字板101与显示器102通过透明粘合剂103贴合，但是在显示器102与光学装置104的缝隙105未配置有缓冲材料。因此，显示器102成为悬挂在文字板101上的状态，有可能通过显示器102的自重而对透明粘合剂103施加应力，产生显示器102的剥离、显示失真等不良情况。
另外，在图4的比较例2的显示装置中，文字板201和显示器202未通过透明粘合剂贴合。另外，显示器202通过粘合剂204固定于光学装置203上。但是，由于在文字板201与显示器202之间夹有空气层205，通过显示器202进行的显示的可视性恶化。
本公开根据实施例进行了描述，但应该理解本公开并不局限于该实施例、结构。本公开也包含各种变形例、均等范围内的变形。另外，也将各种组合、方式、甚至仅包括其中一个要素、更多、或更少的要素的其他的组合、方式纳入本公开的范畴、思想范围。
例如在上述实施方式中，文字板为聚碳酸酯制，但也可以是其他的透明树脂制。另外，也可以代替文字板，而采用玻璃制的盖板。通过采用玻璃制的盖板，能够赋予高级的质感。另外，在上述实施方式中，对将本公开应用于组合仪表的例子进行了说明，但也可以应用于其他的显示装置(例如导航装置的画面、显示空调的设定内容的画面等)。另外，也可以将本公开应用于车辆以外所使用的显示装置。

Claims (7)

1.一种显示装置(1)，具备：
显示器(3)，在显示面(31)显示图像；
盖板(2)，通过透明粘合剂(4)贴合在上述显示器的上述显示面一侧，具有能够视觉确认上述显示面的透光部(22)；
光学装置(5)，以与上述显示器之间存在缝隙(11)的方式配置于上述显示器的背后，向上述显示器的背面供给用于上述显示器的显示的光；
第一支承部(7)，支承上述光学装置；
第二支承部(6)，支承上述盖板；以及
缓冲材料(12)，以与上述显示器及上述光学装置双方接触的方式设置于上述缝隙。
2.根据权利要求1所述的显示装置，其中，
上述缓冲材料以围绕上述显示面中的不显示上述图像的外周缘的方式设置于该外周缘。
3.根据权利要求1或者2所述的显示装置，其中，
上述盖板是聚碳酸酯制。
4.根据权利要求1所述的显示装置，其中，
还具备屏蔽部件(8)，该屏蔽部件(8)设置为覆盖被安装于上述第一支承部的电子部件，用于阻断从上述电子部件放射的噪声、以及从外部混入上述电子部件的噪声。
5.根据权利要求1所述的显示装置，其中，
上述缓冲材料以厚度被压缩的状态设置。
6.根据权利要求1所述的显示装置，其中，
上述光学装置与上述显示部在组装于上述显示装置的状态下仅通过上述缓冲材料直接连接。
7.根据权利要求1所述的显示装置，其中，
上述光学装置具备：导光板(51)，配置为覆盖显示部的背面；多个LED(52)，将光入射到上述导光板的侧边缘；白色框架(53)，以覆盖上述导光板的侧面及背面的形状设置，用于在导光板的端面提高向导光板内反射的反射效率来提高亮度；扩散板(54)，以覆盖上述导光板的表面的形式设置，用于使从表面射出的光扩散来使光从表面均匀地射出；圆柱突起部(55)，从上述白色框架向背后方向延伸设置至上述第一支承部的位置；保护框架(56)，以覆盖上述白色框架的侧面以及背面的形式设置，收容保护上述导光板、上述多个LED及上述扩散板；以及边框(57)，沿上述光学装置的外周以环状设置。
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