JP2011226838A - Measuring apparatus for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measuring apparatus for vehicle which is capable of achieving cost reduction.SOLUTION: The measuring apparatus for vehicle comprises: a liquid crystal display 8 for displaying prescribed information; a display board 4 in which a display window 41 which enables a visual confirmation of the liquid crystal display 8 is formed; and a light guide plate 7 which is sandwiched between the display board 4 and the liquid crystal display 8, illuminates the display board 4 and includes an opening 73 which enables a visual confirmation of the liquid crystal display 8. The liquid crystal display 8 includes: a liquid crystal panel 81; a holder 82 which supports the liquid crystal panel 81 from behind; and a holding member 83 which is composed of a light-shielding material that covers the peripheral edge of the liquid crystal panel 81 from the display surface side and holds the liquid crystal panel 81 between the holder 82 and the holding member 83. The holding member 83 includes a light shielding part 834 for shielding light advancing from an opening hole 833 to the liquid crystal panel 81.

Description

  The present invention relates to a vehicular instrument provided with an electronic display unit composed of, for example, a liquid crystal display.

  As a conventional vehicle instrument, for example, one described in the cited document 1 is known. The vehicle instrument includes a display that displays predetermined information, a display board that is disposed on a display surface side of the display and has a display window that allows the display to be visually recognized, and the display board and the display. And a light guide plate provided with an opening formed so as to illuminate the display plate and make the display visible. The display is composed of a liquid crystal display composed of a liquid crystal panel and a holder that supports the liquid crystal panel from the back. The light guide plate leaks to the inner edge of the opening and light guided by the light guide plate leaks to the front of the display panel. The light-shielding part is integrally formed with a light guide body made of a transparent synthetic resin by a two-color molding method or a multiple molding method using a synthetic resin having a light-shielding property. Yes.

JP 2009-128257 A

  However, in the vehicle instrument described in Patent Document 1, the light guide is formed by two-color molding or multiple molding of different synthetic resins for the convenience of providing a light-shielding portion in the light guide, so that the molding processing cost is high. However, there is a problem of increasing the cost. In addition, if the light shielding part is separated from the light guide to be a separate part, there is a problem that an increase in cost due to an increase in the number of parts cannot be avoided.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle display device capable of reducing costs.

  In order to achieve the above object, the present invention provides a display for displaying predetermined information, a display board disposed on the display surface side of the display and having a display window that allows the display to be viewed, and the display A light guide plate provided in a state of being sandwiched between a plate and the display device, wherein the display plate illuminates the display plate and allows the display device to be visually recognized, and the display device includes a display panel. A vehicle instrument comprising: a holder for supporting the display panel from behind; and a holding member made of a light-shielding material for covering the periphery of the display panel from the display surface side and holding the display panel between the holder. The holding member is provided with a light shielding portion that blocks light traveling from the opening to the display panel side.

  Further, the present invention is characterized in that the light shielding portion is positioned outside the display window so that the light shielding portion is covered with the display plate.

  Further, the present invention is characterized in that a bent portion formed on the light shielding portion side so as to overlap the light shielding portion is provided at a peripheral portion of the display window.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle instrument which can achieve a cost reduction can be provided.

The front view of the instrument for vehicles which shows 1st Embodiment in this invention. AA sectional drawing same as the above (hatching is omitted). The expanded sectional view of a holding member same as the above (hatching is omitted). The expansion perspective view of a holding member same as the above. The figure which shows the 2nd Embodiment of this invention.

The embodiment will be described with reference to the accompanying drawings, taking as an example the case where the vehicle meter according to the present invention is applied to an automobile meter.

  The vehicle instrument is composed of a front panel 1, a facing plate 2, a light source 3, a display plate 4, a pointer 5, a middle case 6, a light guide 7, a liquid crystal display (display) 8, and a circuit. It is mainly composed of a substrate 9 and a back cover 10.

  The front panel 1 is a front cover made of a colorless and transparent translucent synthetic resin, and prevents dust and the like from entering.

  The facing member 2 is made of synthetic resin that is dark and opaque, and covers a required part of the instrument.

  For example, a chip-type light emitting diode can be applied as the light source 3, which includes a display plate light source 31 that illuminates the display plate 4 and a liquid crystal display light source 32 that illuminates a liquid crystal display 8 described later. Are arranged.

  The display board 4 is a well-known printing board in which, for example, a black ground portion serving as a background and an indicator portion 42 such as a scale or number indicating speed are provided by performing screen printing on a translucent synthetic resin plate. Consists of. Moreover, it has the display window 41 cut and formed so that the liquid crystal display 7 mentioned later can be seen through.

  The pointer 5 is made of a translucent resin and indicates the indicator portion 42. In the case of this embodiment, the pointer 5 is attached to the tip of the pointer shaft 51 extending from the drive source 52 disposed behind the circuit board 9.

  The middle case 6 is formed using, for example, a white impermeable synthetic resin, and is disposed on the circuit board 9 accommodated in the back cover 10. In addition, the middle case 5 forms an illumination room R in which a light guide 7 described later is disposed at a location corresponding to the indicator portion 42 of the display plate 4.

  The light guide 7 is made of a translucent synthetic resin, and includes a light incident portion 71 where light enters, a light guide portion 72 that guides light toward the display plate 4, and an opening 73 corresponding to the display window 41. Consists of Further, as shown in FIG. 1, the light guide portion 72 has a fan shape in order to guide the light of the display plate light source 31 to the indicator portion 42 provided on the display plate 4. The opening 73 is formed in a slightly similar shape than the display window 41 and exposes the liquid crystal display 7 described later. Further, the light guide 7 is in a state where the region facing the opening 73 is sandwiched between the display plate 4 and the liquid crystal display 8.

  The liquid crystal display 8 includes a liquid crystal panel (display panel) 81, a cell case (holder) 82, a holding member 83, and a liquid crystal display light source 32.

  The liquid crystal panel 81 is formed by sealing liquid crystal molecules in two opposing glass substrates, and includes a plurality of lead terminals 811 on one side thereof. The liquid crystal panel 81 displays vehicle information such as travel distance and outside temperature as the predetermined information.

  For example, a milky white synthetic resin material can be applied to the cell case 82. The cell case 82 is positioned on the circuit board 9 and the periphery of the liquid crystal display panel 81 is placed thereon.

  The holding member 83 is made of, for example, metal, and a plurality of engaging portions 831 that cover the periphery of the liquid crystal panel 81 from the display surface side so that the liquid crystal display panel 81 is not detached from the cell case 82 and a side wall of the cell case 82. Locking hooks 832.

  Further, the holding portion 831 is provided with an opening hole 833 corresponding to the display window 41 provided on the display plate 4, and is the same so as to surround the periphery of the opening hole 833 as shown in FIGS. The light-shielding portion 834 is formed integrally with the member.

  The light-shielding portion 834 is formed so as to block the inner edge side wall portion of the opening portion 73 through the space S, whereby light guided through the light guide 7 leaks from the inner edge side wall portion of the opening portion 73 onto the liquid crystal panel 81. Is preventing.

  Further, the light shielding portion 834 is positioned outside the display window 41 so as to be covered by the display plate 4 when viewed from the driver side.

  As the circuit board 9, a hard circuit board made of glass epoxy resin can be applied. A circuit pattern (not shown) is formed, and the light sources 31 and 32 are connected to the circuit pattern by soldering, for example.

  The back case 10 is made of an uncolored synthetic resin such as polypropylene, and covers the back surface of the circuit board 8.

  Next, the traveling direction of the light beam emitted from the display panel light source 31 of the vehicle instrument configured as described above will be described.

  A light beam emitted from the light source 31 for display panel enters the light incident portion 71 of the light guide 7, illuminates the indicator portion 42 toward the indicator portion 42 while being irregularly reflected by the inner wall of the light guide portion 72. After reaching the opening 73 of the light guide 7, the light going to the liquid crystal panel 81 side is further reflected by the light shielding unit 834 toward the indicator unit 42, so that the light is blocked by the light shielding unit 834. The light does not leak into the liquid crystal panel 81.

  Thus, in order to achieve the above object, the present invention provides a liquid crystal display 8 that displays predetermined information, and a display window 41 that is arranged on the display surface side of the liquid crystal display 8 so that the liquid crystal display 8 can be viewed. And an opening 73 that is provided between the display plate 4 and the liquid crystal display 8 so as to illuminate the display plate 4 and make the liquid crystal display 8 visible. A liquid crystal panel 81, a holder 82 that supports the liquid crystal panel 81 from behind, a liquid crystal panel 81 that covers the periphery of the liquid crystal panel 81 from the display surface side, and a liquid crystal between the holder 82 and the liquid crystal panel 81. In a vehicle instrument having a holding member 83 made of a light-shielding material that holds the panel 81, the holding member 83 is provided with a light-blocking portion 834 that blocks light traveling from the opening 73 to the liquid crystal panel side. Aho Since members can be formed light-shielding portion 834 by using, or using a dedicated light shielding member, for molding cost is not also increase, it can achieve cost reduction.

  In the present embodiment, the display plate 4 is formed with an extension 43 extending beyond the light shielding portion 834 toward the center of the liquid crystal panel 81, and the light shielding portion 834 is covered with the extension 43 to display the light shielding portion 834. It is located outside the window 41. Thereby, the front side of the light shielding part 834 is covered with the display plate 4 (extension part 43), so that the light shielding part 834 can be prevented from being visually recognized, and the appearance quality can be improved.

  In the present embodiment, the light shielding portion 834 is provided so as to cover the periphery of the holding member 83. However, if it is possible to prevent halation from occurring in the display area of the liquid crystal display 8 due to light leakage, the light shielding portion 834 is provided on all four sides. The light shielding portion 834 is not necessarily provided, and the light shielding portion 834 may be provided only where necessary.

  Next, a second embodiment of the present invention will be described with reference to FIG.

  In the present embodiment, a bent portion 44 is formed in the extended portion 43 that is the peripheral portion of the display window 41. The bent portion 44 is formed by bending the extended portion 43 toward the inner edge of the light shielding portion 834, and is provided so as to overlap the light shielding portion 834 in a direction orthogonal to the thickness direction of the liquid crystal panel 81.

  As described above, in the present embodiment, by providing the extended portion 43 bent portion 42a that is the peripheral portion of the display window 41, not only the front surface side of the light shielding portion 834 but also the inner edge portion thereof can be covered. The concealment effect of the light-shielding portion 834 can be enhanced, and appearance quality can be improved.

DESCRIPTION OF SYMBOLS 1 Front panel 2 Lookback plate 3 Light source 4 Display board 5 Pointer 6 Middle case 7 Light guide (light guide plate)
8 Liquid crystal display (display)
9 Circuit board 10 Back cover 31 Light source for display panel 32 Light source for liquid crystal display 41 Display window 42 Indicator part 71 Light incident part 72 Light guide part 73 Opening part 81 Liquid crystal panel 82 Cell case (holder)
83 Holding member 831 Holding part 832 Locking hook 833 Opening hole R Lighting chamber S Space

Claims (3)

A display device that displays predetermined information, a display plate that is disposed on the display surface side of the display device and has a display window that allows the display device to be visually recognized, and is sandwiched between the display plate and the display device A light guide plate that is provided in a state where the display panel is illuminated and has an opening that allows the display to be visually recognized, and the display includes a display panel, and a holder that supports the display panel from behind. A vehicle instrument having a holding member made of a light-shielding material that covers the periphery of the display panel from the display surface side and holds the display panel between the display panel and the holding member. A vehicular instrument characterized by comprising a light-shielding portion that blocks light traveling toward the display panel. The vehicle instrument according to claim 1, wherein the light shielding part is positioned outside the display window so that the light shielding part is covered with the display plate. The vehicular instrument according to claim 1, wherein a bent portion that is bent toward the light shielding portion so as to overlap the light shielding portion is provided at a peripheral portion of the display window.

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