JP2008309954A - Display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reliably separate the illumination light sources from one another in a simple configuration not requiring special holders for them. <P>SOLUTION: The illumination objects 22 are arranged on a panel 10. A circuit board 12 is disposed on the rear side of the panel 10 and illumination light sources 24 are mounted on this circuit board 12 to illuminate the objects 22. In order to prevent the light of those light sources 24 from crossing one another, barrier walls 26 are formed on the rear side of the panel 10 and an elastic sheet 30 is formed on the circuit board 12 on its surface facing the panel 10. The barrier walls 26 are positioned between the adjoining light sources 24 and project from the rear surface of the panel 10 toward the circuit board 12. The edges of those barrier walls 26 are in close contact with the elastic sheet 30 by deforming it. Thus the illumination light sources 24 are separated from one another. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a display device provided in a passenger compartment of an automobile.

  An audio operation panel, an air conditioner operation panel, and the like of an automobile are provided with an illumination function for clarifying the operation part and display contents at night. For such illumination, an illumination object such as an indicator lens is provided on the panel, and a circuit board on which an illumination light source such as an LED is mounted is disposed on the back side of the panel.

  In such a display device, when a plurality of illumination objects are arranged on the panel, a plurality of illumination light sources may be mounted on the circuit board corresponding to the illumination objects. In that case, it is preferable that only the light from the illumination light source corresponding to the illumination object is incident on each illumination object. However, when the distance between the illumination light sources is relatively small, a plurality of illumination light sources are used. There is a risk that proper illumination will be difficult due to the crossing of light.

  As means for solving such inconvenience, FIG. 3 of Patent Document 1 discloses a technique of forming a light shielding plate on the panel (housing) side. The light shielding plate has a shape that extends from the back surface of the panel toward the illumination light source (LED) side and covers the periphery of the indicator lens that is the illumination target.

FIG. 2 of Patent Document 1 discloses a technique for forming a light shielding elastic flapper on the LED holder side that holds the LED. The elastic flapper has a shape that covers each LED, and has a function of isolating adjacent LEDs by contacting the back surface of a lens array that holds a lens portion that is an illumination target.
No. 62-137525 microfilm

  The technique described in FIG. 3 of Patent Document 1 cannot completely prevent the crossing of light between adjacent LEDs. In this technique, a light shielding plate is formed on the panel side so as to surround each illumination object. Light from an adjacent LED enters each illumination object (indicator lens) through a gap between the light shielding plate and the LED holder. There is a risk of it.

  On the other hand, in the technique described in FIG. 2 of the document 1, each elastic flapper formed on the LED holder can completely separate adjacent LEDs, but the versatility is low. That is, in order to introduce the elastic flapper as described above, an LED holder that is a dedicated molded product for holding the LED must be used, and a general circuit board, for example, the LED is mounted by soldering or the like. The technique cannot be applied to an apparatus using a printed circuit board.

  In view of such circumstances, the present invention provides a display device that can reliably isolate illumination light sources for illumination with a simple structure that does not require a special member for holding the illumination light source. For the purpose.

  As means for solving the above problems, the present invention includes a panel, a plurality of illumination objects arranged in the panel, and a plurality of illumination light sources for illuminating each of these illumination objects. A display device, comprising: a circuit board disposed on the back side of the panel and on which each of the illumination light sources is mounted; and an elastic member provided on a surface of the circuit board facing the panel. The panel has an isolation wall that is positioned between the illumination light sources adjacent to each other among the illumination light sources and protrudes from the back surface of the panel toward the circuit board, and an end portion of the isolation wall is the elastic The light sources for illumination which are adjacent to each other are isolated from each other by closely contacting the members with elastic deformation.

  Note that “isolating the illumination light sources” here means that optical isolation, that is, prevention of light crossing between the illumination light sources only needs to be achieved. Each illumination light source may not be completely confined.

  In the apparatus, the isolation wall provided on the panel side is in close contact with the elastic member on the circuit board side with its elastic deformation, thereby reliably isolating the illumination light sources adjacent to each other. In addition, it is only necessary that the elastic member is provided on the circuit board side, and it is possible to use a normal one as it is for the circuit board itself.

  The elastic member may be provided for each isolation wall, but it is more preferable that the elastic member has a shape that can be in close contact with a plurality of isolation walls. Thereby, the required number of elastic members is reduced, and the structure is further simplified.

  For example, the elastic member has a plurality of through holes for exposing a plurality of illumination light sources mounted on the circuit board to the illumination object side, and a peripheral portion of each through hole is the each illumination. The elastic member can be easily assembled to the circuit board as long as it can be in close contact with the isolation wall corresponding to the light source. In particular, it is possible to accurately position the elastic member, the illumination light source, and the corresponding isolation wall.

  Further, if the elastic member is made of a single elastic sheet and all the isolation walls can be in close contact with the elastic sheet, the structure is further simplified.

  Further, on the circuit board, a board-side switch contact is provided at a position different from a position where each of the illumination light sources is mounted, and the elastic member is a part different from a part that is in close contact with the isolation walls. In addition, a switch portion having an elastic switch contact that is elastically deformed by a pressing operation and that contacts the substrate-side switch contact by the elastic deformation may be integrally provided. This elastic member serves both as a switch member provided on the circuit board and a member for isolating the illumination light sources, thereby contributing to further simplification of the structure of the entire display device. According to this apparatus, it is not necessary to provide a new elastic member dedicated for isolating the illumination light sources separately from the switch member.

  More preferably, the isolation wall has a cylindrical shape surrounding the illumination light source, and an end of the isolation wall is in close contact with the elastic member over the entire circumference. The isolation wall having such a shape further ensures the isolation between the illumination light sources.

  Furthermore, in such a cylindrical isolation wall, the illumination object can be fixed to the panel by press-fitting the illumination object inside thereof, thereby simplifying the structure on the panel side. The

  As described above, the present invention has a simple structure in which an isolation wall is provided on the panel side and an elastic member on which the isolation wall can be elastically adhered is provided on the circuit board side. Without the introduction, there is an effect that the illumination light sources adjacent to each other can be reliably separated and appropriate illumination can be realized.

  Preferred embodiments of the present invention will be described with reference to the drawings.

  The display device shown in FIG. 1 is an electronic device incorporated in, for example, an instrument panel of an automobile, and includes a main body panel 10, a circuit board 12 and a rear cover 14 disposed on the back side thereof. The rear cover 14 is fixed to the back surface of the main body panel 10 with screws (not shown) so as to accommodate the circuit board 12 while sandwiching the circuit board 12 with the main body panel 10.

  The main body panel 10 is provided with a center dial knob 15 and left and right dial knobs 16 so as to be rotatable. Correspondingly, on the circuit board 12, dial elements 17 and 18 that are respectively rotated by the dial knobs 15 and 16, and a knob support member 20 for supporting the dial knobs 15 and 16. , 21 are fixed.

  The main body panel 10 further holds a plurality of indicator lenses 22 as shown in FIGS. 2 and 3 as illumination objects. In this embodiment, these indicator lenses 22 are arranged so as to be close to each other along the inner peripheral edges of the left and right dial knobs 16. On the other hand, a plurality of illumination light sources 24 for individually illuminating the indicator lenses 22 are mounted on the circuit board 12. These illumination light sources 24 are constituted by LEDs, for example, and are respectively disposed at positions immediately behind the indicator lens 22 to be illuminated.

  In the present invention, the specific structure, the number, and the arrangement position of the illumination object are not limited. The illumination object is not limited to an indicator lens, and may be a simple transparent plate, for example.

  The disposition positions of the indicator lenses 22 and the corresponding illumination light sources 24 are adjacent to each other. Accordingly, if there is no special structure for shielding light, the light from each illumination light source 24 may be interlaced with each other. In order to prevent such crossing, an isolation wall 26 is provided on the back surface on the main body panel 10 side, and an elastic sheet 30 as shown in FIG. 4 is provided on the circuit board 12 side.

  The isolation wall 26 is formed at a position corresponding to each indicator lens 22. Each isolation wall 26 has a cylindrical shape that individually surrounds each of the illumination light sources 24, and protrudes backward (that is, toward the circuit board 12) from the back surface of the main body panel 10. In this embodiment, each of the indicator lenses 22 has a shape extending coaxially with the isolation wall 26, and these indicator lenses 22 are respectively press-fitted inside the corresponding isolation walls 26, thereby being inserted into the main body panel 10. Fixed. A decorative panel 28 is attached to an appropriate area on the front side surface of the main body panel 10.

  The elastic sheet 30 is made of an elastic member such as rubber, and is provided on a surface of the circuit board 12 that faces the main body panel 10 and is fixed along the surface. The arrangement region of the elastic sheet 30 includes the mounting position of each illumination light source 24 on the circuit board 12. The elastic sheet 30 has through-holes 32 for individually exposing the illumination light sources 24 to the indicator lens 22 side at positions corresponding to the mounting positions.

  The projecting dimension (axial dimension) of each isolation wall 26 is such that each elastic sheet 30 is elastically deformed while the circuit board 12 and the rear cover 14 are assembled to the main body panel 10. It is set so that the isolation wall 26 is in close contact. Specifically, the front end surface of each isolation wall 26 is in close contact with the peripheral portion of each through-hole 32 in the elastic sheet 30 over the entire circumference.

  The close contact between the isolation walls 26 and the elastic sheet 30 isolates the illumination light sources 24 individually and prevents illumination light from intermingling between the illumination light sources 24 adjacent to each other. Further, it is not necessary to give the circuit board 12 a special structure, and it is only necessary to arrange the elastic sheet 30 on the surface thereof, so that the circuit board 12 can be used as it is. It is.

  Furthermore, the elastic sheet 30 according to this embodiment is used not only for isolating the illumination light source 24 but also as an elastic switch member, and contributes to further simplification of the structure of the entire apparatus. Specifically, the elastic sheet 30 integrally has a plurality of switch portions 34 as shown in FIG. 5 at positions different from the respective through holes 32 (positions inside the arrangement region of the left and right through holes 32). .

  Each switch portion 34 integrally includes a switch body 35 that receives a pressing operation, and a thin portion 36 that connects the peripheral portion of the switch body 35 and the body portion of the elastic sheet 30. The thin portion 36 is bent or elastically deformed to allow displacement of the switch body 35 in a direction in which the switch body 35 is pressed (a direction parallel to the thickness direction of the elastic sheet 30).

  An elastic switch contact 35 a made of a conductor is provided on the back surface of the switch body 35. Correspondingly, a board-side switch contact 13 is provided on the circuit board 12, and both the contacts 35a, 13 are brought into contact with each other by elastic displacement of the switch body 35 in the pressing direction.

  The switch unit 34 is pressed from the main body panel 10 side. Specifically, the main body panel 10 is provided with a pair of left and right operation buttons 11 that can be pressed from the front side of the panel, and the pressing force applied to each operation button 11 is simultaneously transmitted to the plurality of switch portions 34. For the transmission, a pressing force transmission member 38 is interposed between each operation button 11 and the corresponding switch part 34. The pressing force transmission member 38 is supported by a guide member 40 provided on the main body panel 10 side so as to be slidable in the pressing direction, and the pressing force applied to the operation button 11 by sliding in the direction is applied to each switch. Tell part 34.

  The present invention is not limited to the embodiment described above. For example, the following embodiments can be included.

  -This invention may comprise the some elastic member provided for every isolation wall. In that case, each elastic member should just be provided only in the site | part which can contact with each isolation wall. However, an elastic member that simultaneously contacts a plurality of isolation walls like the elastic sheet 30 shown in FIG. 1 and the like contributes to a reduction in the number of parts. In particular, the elastic sheet 30 has a through-hole 32 for exposing each of the illumination light sources 24, and its peripheral portion contacts each isolation wall 26. Therefore, the elastic sheet 30 is assembled to the circuit board 12, In particular, the relative position between the elastic sheet 30 and each illumination light source 24 and each isolation wall 26 can be determined more accurately.

  -The shape of the isolation wall is not limited to the cylindrical shape shown in the figure. What is necessary is just to have a light-shielding function that intervenes at least between the light sources for illumination and prevents the crossing of the illumination light between the light sources. However, the cylindrical shape has an advantage that the illumination light sources can be reliably separated with a simple shape.

It is a disassembled perspective view of the electronic device provided with the display apparatus which concerns on embodiment of this invention. It is a front view of the said display apparatus. It is the III-III sectional view taken on the line of FIG. It is a perspective view of the elastic sheet contained in the said display apparatus. It is sectional drawing which shows the switch part and its periphery element contained in the said elastic sheet.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Main body panel 12 Circuit board 13 Board side switch contact 22 Indicator lens (illumination object)
24 Illumination light source 26 Separation wall 30 Elastic sheet 32 Through hole 34 Switch part

Claims (7)

A display device comprising a panel, a plurality of illumination objects arranged in the panel, and a plurality of illumination light sources for illuminating each of these illumination objects,
A circuit board disposed on the back side of the panel and on which each of the illumination light sources is mounted;
An elastic member provided on a surface of the circuit board facing the panel; and
The panel has an isolation wall that is positioned between the illumination light sources adjacent to each other among the illumination light sources and protrudes from the back surface of the panel toward the circuit board, and an end portion of the isolation wall is the elastic A display device characterized in that the illumination light sources adjacent to each other are isolated from each other by being in close contact with the member while being elastically deformed. The display device according to claim 1,
The display device according to claim 1, wherein the elastic member has a shape capable of being in close contact with a plurality of isolation walls at the same time. The display device according to claim 2, wherein
The elastic member has a plurality of through holes for exposing a plurality of illumination light sources mounted on the circuit board to the illumination target body side, and a peripheral portion of each through hole is the illumination light source. A display device characterized in that it can be in close contact with an isolation wall corresponding to the above. The display device according to claim 2 or 3,
The display device according to claim 1, wherein the elastic member is formed of a single elastic sheet provided along a surface of the circuit board facing the panel, and all the isolation walls can be in close contact with the elastic sheet. The display device according to any one of claims 2 to 4,
On the circuit board, a board-side switch contact is provided at a position different from the position where each of the illumination light sources is mounted,
The elastic member is a switch having an elastic switch contact that is elastically deformed by a pressing operation to a portion different from the portion that is in close contact with each isolation wall, and that contacts the substrate-side switch contact by the elastic deformation. A display device comprising an integral part. The display device according to any one of claims 1 to 5,
The display device is characterized in that the isolation wall has a cylindrical shape surrounding the illumination light source, and an end of the isolation wall is in close contact with the elastic member over the entire circumference. The display device according to claim 6, wherein
The display device according to claim 1, wherein the illumination object is fixed to the panel by being press-fitted inside the isolation wall.

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