JP2017133979A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device that can suppress an increase in temperature of a display.SOLUTION: A display 101 displays an image. A flexible wiring board 20 includes a substrate formed of metal, is connected to the rear face of the display 101 with a thermally conductive adhesive, and is extended to the lateral sides of the display 101. A light emitting element is mounted on the flexible wiring board 20. A display plate 40 is illuminated by the light emitting element. An indicator 10 indicates the display plate 40. A driving part 22 is connected to the flexible wiring board 20 to rotate the indicator 10.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a display device including a display for displaying an image.

  Conventionally, various display devices in which a display is housed in a housing have been proposed, and for example, disclosed in Patent Document 1. The display device described in Patent Document 1 is a device in which a liquid crystal display for displaying an image is housed in a housing, and an image displayed on the liquid crystal display is visually recognized from a window provided in a light-transmitting protective cover. To do.

Japanese Patent Laying-Open No. 2015-99285

However, when the liquid crystal display is driven for a long time with the ambient temperature (air temperature) of the vehicle display device being high, the temperature of the liquid crystal display rises excessively. When the liquid crystal display is overheated, the liquid crystal display may malfunction, so a display device that can suppress the temperature rise of the liquid crystal display is desired.
This invention is made | formed in view of this problem, and provides the display apparatus which can suppress the temperature rise of a display.

  The present invention includes a display 1, 101 for displaying an image, a flexible wiring board 6, 20 having a substrate 6 b, 20 b made of metal and abutting against the rear surface of the display 1, 101, and the flexibility Light-emitting elements 6a and 24 mounted on the wiring boards 6 and 20 and display members 2 and 40 having display portions 2c and 41 illuminated by the light-emitting elements 6a and 24 are provided.

  Further, the present invention is mounted on the display 101 for displaying an image, a flexible wiring board 20 having a substrate 20b made of metal and abutting against the rear surface of the display 101, and the flexible wiring board 20. The light emitting element 24, the display board 40 illuminated by the light emitting element 24, the pointer 10 indicating the display board 40, and the driving unit 22 connected to the flexible wiring board 20 and rotating the pointer 10. And.

  The heat generated in the display can be dissipated on the substrate of the flexible wiring board, and the temperature rise of the display can be suppressed.

Sectional drawing which shows 1st embodiment of this invention. The front view which shows embodiment same as the above. The principal part expanded sectional view which shows embodiment same as the above. The principal part expanded sectional view which shows embodiment same as the above. Sectional drawing which shows 2nd embodiment of this invention. The principal part front view which shows embodiment same as the above. Sectional drawing which shows embodiment same as the above. The principal part expanded sectional view which shows embodiment same as the above.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. 1 to 4 show a first embodiment. The vehicle display device includes a liquid crystal display 1, a protective cover 2, a housing 3, a circuit board 4, a turning part 5, and a flexible wiring board 6.

  The liquid crystal display 1 includes a TFT type full color LCD panel 1a and a backlight module (not shown) housed in a case body 1b, and has a substantially flat plate shape. On the screen of the liquid crystal display 1, vehicle information such as vehicle speed and navigation information is displayed as an image. The case body 1b of the liquid crystal display 1 has a support portion 1c, and the liquid crystal display 1 is fixed to the front surface of the circuit board 4 by the support portion 1c.

  The protective cover 2 is formed by forming a light shielding portion 2b made of a black print layer on the rear surface of a base material 2a made of a light-transmitting resin such as acrylic or polycarbonate. The protective cover 2 has a curved shape having a substantially uniform thickness as a whole, and has a concave shape (convex shape toward the liquid crystal display 1) when viewed from a person viewing the vehicle display device.

  The light shielding portion 2 b of the protective cover 2 has a window portion 2 d that allows the screen of the liquid crystal display 1 to be seen through. The protective cover 2 has a plurality of warning display portions 2c each having an opening of the light shielding portion 2b. The warning display part 2c of the protective cover 2 is transmitted and illuminated by a light emitting element 6a described later. It is desirable that the front surface and the rear surface of the base material 2a of the protective cover 2 are subjected to an antireflection treatment such as an antireflection coating.

  The housing 3 is made of a resin such as AES, and has a bottom wall portion 3a and a peripheral wall portion 3b. The housing 3 accommodates a liquid crystal display 1, a circuit board 4, a turning portion 5, and a flexible wiring board 6. The bottom wall 3a of the housing 3 is formed with a protrusion 3f protruding forward, and the circuit board 4 is supported by the protrusion 3f. Further, the bottom wall portion 3 a of the housing 3 is formed with a protruding portion 3 c that protrudes forward. A substantially cylindrical projection 3d is formed on the protrusion 3c of the housing 3, and the flexible wiring board 6 is positioned on the projection 3d. A protective cover 2 is fixed to the front surface of the peripheral wall 3 b of the housing 3.

  The circuit board 4 is formed by forming a wiring pattern made of copper foil on a base material made of glass epoxy resin, and is housed in the housing 3. The circuit board 4 is connected to the liquid crystal display 1 by a wiring member (not shown). A microcomputer or the like for driving the liquid crystal display 1 is mounted on the front surface of the circuit board 4.

  The look-back unit 5 hides an area other than the screen of the liquid crystal display 1. The facing portion 5 has a cylindrical shape surrounding the screen of the liquid crystal display 1, the front end portion 5 a of the facing portion 5 abuts on the rear surface of the protective cover 2, and the rear end portion 5 b of the facing portion 5 is a liquid crystal display. It is in contact with the front surface of the vessel 1.

  The flexible wiring board 6 includes a substrate 6b, an insulating layer 6c, a conductive portion 6d, and an overcoat 6e. The substrate 6b of the flexible wiring board 6 is made of aluminum and has flexibility. The insulating layer 6c of the flexible wiring board 6 is made of polyimide, and is in close contact with the substrate 6b with a heat conductive adhesive (not shown). The conductive portion 6d is a wiring pattern made of a copper foil, and is formed on the insulating layer 6c. The overcoat 6e covers the conductive layer 6c.

  The flexible wiring board 6 is formed with a hole 6h through which the support 1c passes. The flexible wiring board 6 is brought into close contact with the rear surface of the liquid crystal display 1 by a heat conductive adhesive, and is also extended to the side of the liquid crystal display 1, and the extended portion is a protruding portion. It has a curved shape covering 3c. A light-emitting element 6a is mounted on the flexible wiring board 6, and the warning display portion 2c is illuminated from behind by the light-emitting element 6a. The light emitting element 6a is disposed in the vicinity of the protrusion 3d and is indirectly supported by the protruding portion 3c.

  5 to 8 show a second embodiment. The vehicle display device includes a liquid crystal display 101, a protective cover 102, a housing 103, a circuit board 104, and a pointer type instrument 107.

  The liquid crystal display 101 includes a TFT full-color LCD panel 101a and a backlight module (not shown) housed in a case body 101b, and has a substantially flat plate shape. The case body 101b of the liquid crystal display 101 has a support portion 101c, and the liquid crystal display 101 is fixed to the front surface of the circuit board 104 by the support portion 101c.

  The protective cover 102 is made of a translucent resin such as acrylic or polycarbonate. The protective cover 102 has a curved shape having a substantially uniform thickness as a whole, and has a concave shape (convex shape toward the liquid crystal display 101) as viewed from a person viewing the vehicle display device.

  The housing 103 is made of a resin such as AES, and has a bottom wall portion 103a and a peripheral wall portion 3b. In the housing 103, a liquid crystal display 101, a circuit board 104, and a pointer type instrument 107 are accommodated. A protrusion 103f protruding forward is formed on the bottom wall 103a of the housing 103, and the circuit board 104 is supported by the protrusion 103f. A protective cover 102 is fixed to the front surface of the peripheral wall portion 103 b of the housing 103.

  The circuit board 104 is formed by forming a wiring pattern made of copper foil on a base material made of glass epoxy resin, and is housed in the housing 103. The circuit board 104 is connected to the liquid crystal display 1 by a wiring member (not shown). A microcomputer or the like for driving the liquid crystal display 101 is mounted on the front surface of the circuit board 104.

  The pointer-type meter 107 includes a pointer 10, a flexible wiring board 20, a case body 30, and a display board 40. In the second embodiment, two pointer-type meters 107 are disposed on the left and right sides of the liquid crystal display 101.

  The pointer 10 includes an instruction portion 11 made of a translucent resin, a pointer cap 12 made of an opaque resin, a boss portion 13 into which the rotating shaft 22a is press-fitted, and a pointer seat 14 on which the indication portion 11 is placed. The indicator unit 41 is instructed by the instruction unit 11. The boss 13 and the pointer seat 14 of the pointer 10 are integrally formed of black resin.

  The flexible wiring board 20 is formed with a hole 20h through which the support portion 101c passes. The flexible wiring board 20 is in close contact with the rear surface of the liquid crystal display 10 by a heat conductive adhesive, and also extends to the side of the liquid crystal display 101. The extended portion is a pointer type. It is a wiring member of the meter 107. The flexible wiring board 20 includes a substrate 20b, an insulating layer 20c, a conductive portion 20d, and an overcoat 20e. The substrate 20b of the flexible wiring board 20 is made of aluminum and has flexibility. The insulating layer 20c of the flexible wiring board 20 is made of polyimide, and is in close contact with the substrate 20b by a heat conductive adhesive (not shown). The conductive part 20d is made of a copper foil and is formed on the insulating layer 20c. The overcoat 20e covers the conductive layer 20c.

  On the flexible wiring board 20, a pointer driving unit 22 and light emitting elements 24 and 25 are mounted. The pointer driving unit 22 includes a movable magnet type driving device, a stepping motor, and the like. The pointer 10 is attached to the rotation shaft 22 a of the pointer driving unit 22. The boss portion 13 of the pointer 10 is inserted into a through hole 40 c formed in the display board 40. The through hole 40 c of the display plate 40 is formed at a location corresponding to the rotation shaft 22 a of the pointer driving unit 22 and penetrates the display plate 40. Each of the light emitting elements 24 and 25 includes one or more light emitting diodes. The light emitting element 24 illuminates and transmits the display panel 40. The light emitting element 25 shines the instruction unit 11 of the pointer 10.

  The case body 30 is made of a white synthetic resin (for example, polypropylene), and the flexible wiring board 20 is fixed to the case body 30. The case body 30 has a vertical part 31, an inclined part 32, a parallel part 33, an inclined part 34, and a vertical part 35. The vertical portion 31 of the case body 30 has a cylindrical shape, the front end is in contact with the rear surface of the display board 40, and the rear end is in contact with the front surface of the flexible wiring board 20. The vertical portion 31 of the case body 30 is a light shielding wall that prevents the illumination light emitted from the light emitting element 24 and the illumination light emitted from the light emitting element 25 from being mixed.

  The inclined portion 32 of the case body 30 has a shape that spreads in an inverted conical shape from the outer peripheral surface of the vertical portion 31. The inclined portion 32 of the case body 30 reflects the illumination light emitted from the light emitting element 24 toward the parallel portion 33 and the inclined portion 34. The parallel part 33 of the case body 30 has a flat plate shape parallel to the display panel 40. The inclined portion 34 of the case body 30 has an inverted conical shape and is continuous with the outer peripheral end of the parallel portion 33. The inclined portion 34 of the case body 30 reflects the illumination light emitted from the light emitting element 24 toward the display plate 40.

  The vertical portion 35 of the case body 30 has a cylindrical shape, and the rear end is in contact with the front surface of the flexible wiring board 20. The vertical portion 35 of the case body 30 is continuous with the outer peripheral end of the inclined portion 34. The vertical portion 35 of the case body 30 has a front end in contact with the rear surface of the display board 40 and a rear end in contact with the front surface of the flexible wiring board 20.

  The display board 40 has a printed layer formed on the front surface of a base material made of a translucent sheet, and has an indicator 41 indicated by the pointer 10. The indicator portion 41 of the display board 40 is arranged in an arc shape with the through hole 40c as the center. The indicator portion 41 of the display panel 40 is transmitted and illuminated by the illumination light emitted from the light emitting element 24.

  In the first and second embodiments, flexible wiring boards 6 and 20 having liquid crystal displays 1 and 101 for displaying images and substrates 6b and 20b made of metal and abutting on the rear surfaces of the liquid crystal displays 1 and 101 are used. And a display member (protective cover 2) having light emitting elements 6a and 24 mounted on the flexible wiring boards 6 and 20, and a display section (warning display section 2c and indicator section 41) illuminated by the light emitting elements 6a and 24. , The display panel 40), and the heat generated in the liquid crystal displays 1, 101 can be dissipated by the substrates 6b, 20b of the flexible wiring boards 6, 20, and the liquid crystal display 1 , 101 can be suppressed. In addition, since the flexible wiring boards 6 and 20 are not members for heat dissipation such as a heat sink, but are wiring members for the light emitting elements 6a and 24, the number of components does not increase. Can be provided at low cost.

  The present invention is not limited to the first and second embodiments, and various modifications are possible. For example, the display of the first and second embodiments is the liquid crystal display 1,101. However, the indicator may be a fluorescent display tube (VFD).

1 Liquid crystal display (display)
2 Protective cover (display member)
2c Warning display part (display part)
DESCRIPTION OF SYMBOLS 3 Housing 5 Look-back part 6 Flexible wiring board 6a Light emitting element 6b Board | substrate 10 Pointer 20 Flexible wiring board 20b Board | substrate 22 Pointer drive part (drive part)
24 Light emitting element 40 Display board (display member)
41 Indicator section (display section)
101 Liquid crystal display (display)

Claims (2)

  A display for displaying an image, a flexible wiring board having a metal substrate and abutting on the rear surface of the display, a light emitting element mounted on the flexible wiring board, and illuminated by the light emitting element And a display member having a display unit.   A display for displaying an image, a flexible wiring board having a metal substrate and abutting on the rear surface of the display, a light emitting element mounted on the flexible wiring board, and illuminated by the light emitting element A display device comprising: a display plate; a pointer indicating the display plate; and a drive unit connected to the flexible wiring board and rotating the pointer.

Images