JP6248693B2 - Display device - Google Patents

Description

  The present invention relates to a display device including a display plate that is illuminated by illumination.

  Conventionally, various vehicle display devices have been proposed, and for example, disclosed in Patent Document 1. Such a vehicle display device has a liquid crystal display panel arranged at the center of a pair of pointer-type meters. The vehicular display device has an indicator portion of a pointer-type instrument and an opening of a liquid crystal display panel on a single display board, and displays the illumination structure of the pointer-type instrument and the liquid crystal display panel behind the display board. An intermediate case provided with a frame-like portion is provided.

JP 2011-99765 A

However, in the display device for a vehicle, when a transparent design is formed on a dial plate, the position where the transparent design is formed and the position of the liquid crystal display panel are close, and a light shielding wall overlaps behind the transparent design, There is a possibility that uneven illumination occurs in a transmissive design that is transmissively illuminated by light from a light source.
The present invention has been made in view of this problem, and provides a display device capable of reducing illumination unevenness of a transmissive display unit.

The present invention includes a display plate 40 having a transmissive display portion 42, a light emitting element 24 that emits illumination light that illuminates and transmits the display plate 40, and a reflective member 30 that reflects the illumination light to the display plate 40. The reflective member 30 has a vertical portion 35 that overlaps the transmissive display portion 42 in a front view, and the vertical portion 35 is in the vicinity of the transmissive display portion 42 and has a minute gap between it and the display plate 40. The light-shielding part 35a which has d and the reflection suppression part 35b which consists of a level | step-difference part are provided.

The present invention also includes a display plate 40 having a transmissive display portion 42, a pointer 10 that points to the display plate 40, pointer drive means 22 that rotates the pointer 10, and illumination that illuminates the display plate 40. a light emitting element 24 that emits light, a reflection member 30 for reflecting the illumination light to the display panel 40, a display panel 51 provided in parallel to the reflective member 30, provided with, on the transmissive display section 42 in the front view The vertical part 35 overlaps the light-shielding part 35a having a minute gap d between the vertical part 35 and the display plate 40 in the vicinity of the transmissive display part 42, and the reflection suppressing part 35b including a step part. And .

In the present invention, the reflection suppressing portion 35b includes a gap d larger than the gap d .

Further, the present invention is pre Kisuki between d, the illumination light is shall be formed so as not to affect the display panel 51.

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  By providing the step portion in the vicinity of the design portion, it is possible to prevent the illumination light from being excessively reflected and to reduce illumination unevenness.

Sectional drawing which shows embodiment of this invention. The front view which shows embodiment same as the above. Sectional drawing which shows the principal part which shows embodiment same as the above.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. The vehicle display device includes a pointer 10, a circuit board 20, a case body 30, a display plate 40, a liquid crystal display 50, and a back cover 60.

  The pointer 10 includes a pointer main body 11 made of a translucent resin and a pointer cap 12 made of an opaque resin, and points to an index portion 41 described later. The circuit board 20 includes a board body 21, a pointer driving unit 22 mounted on the back side of the board body 21, and light emitting elements 24 and 25 mounted on the surface side of the board body 21. 40 is arranged on the rear side.

  The substrate body 21 is formed of a hard printed circuit board in which a driving circuit for driving the pointer driving unit 22 and a light emitting circuit for emitting the light emitting elements 24 and 25 are formed on a flat glass epoxy base material. The drive circuit and the light emitting circuit are each composed of a wiring pattern, a resistor, a capacitor, and the like. The drive circuit drives the pointer drive unit 22 based on a control signal supplied from the control unit. The light emitting circuit causes the light emitting elements 24 and 25 to emit light based on a control signal supplied from the control unit.

  The pointer driving unit 22 includes a movable magnet type driving device, a stepping motor, and the like. The rotation shaft 22 a of the pointer driving unit 22 is inserted into a through hole 21 a formed in the substrate body 21, and the pointer 10 is attached to the rotation shaft 22 a of the pointer driving unit 22. A boss portion of the pointer main body 11 is inserted into a through hole 40 a formed in the display plate 40.

  The drive circuit of the substrate body 21 drives the pointer driving unit 22 based on a control signal supplied from the control unit, and the pointer 10 rotates the rotation shaft 22a at a rotation angle corresponding to the control signal. As a result, the vehicle rotates at a predetermined rotation angle corresponding to the vehicle speed, and instructs an index unit 41 described later.

  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 indicator portion 41 and the design portion 42 of the display board 40. The light emitting elements 24 and 25 are driven based on a control signal supplied from the control unit, and are turned on / off according to an illumination switch or the like operated by a vehicle driver.

  The case body 30 is made of a white synthetic resin (for example, polypropylene), and the circuit 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 panel 40, and the rear end is in contact with the front surface of the circuit 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 circuit board 20. The vertical portion 35 of the case body 30 is continuous with the outer peripheral end of the inclined portion 34.

  In the vertical portion 35 of the case body 30, a light shielding portion 35 a is formed so that the illumination light emitted from the light emitting element 24 does not affect the liquid crystal display 50. The light shielding portion 35 a of the case body 30 is formed in the vertical portion 35 so as to have a minute gap d with the rear surface of the display panel 40. The vertical portion 35 of the case body 30 has a step portion 35b, and prevents the illumination light emitted from the light emitting element 24 from being excessively reflected.

  The display board 40 includes an index portion 41 that is an instruction target of the pointer 10 and an annular design portion 42. The indicator part 41 of the display board 40 has a scale part and a number part arranged in the vicinity of the scale part, and is arranged in an arc shape. The design portion 42 of the display board 40 has an annular shape surrounding the indicator portion 41 and is provided at a location overlapping the vertical portion 35 of the case body 30 in a front view. The indicator portion 41 and the design portion 42 of the display board 40 are transmitted and illuminated by the light emitting element 24.

  The display board 40 is formed by printing a transparent layer 46, a light shielding layer 47, etc. on a base material 45 made of a transparent sheet, and has a flat plate shape. The display board 40 is formed with a through hole 40a into which a boss portion of the pointer main body 11 is rotatably inserted. In addition, a rectangular window 40 b for visually recognizing the image of the liquid crystal display 50 is formed at the center of the display panel 40.

  The liquid crystal display 50 is disposed between two pointer-type meters (speedometer and tachometer). The liquid crystal display 50 includes a liquid crystal display panel 51, a connection member 52, an optical sheet 53, and a case body 54. The liquid crystal display panel 51 has polarizing plates attached to both front and rear surfaces of a liquid crystal cell in which liquid crystal is sealed in a pair of glass substrates on which transparent electrodes are formed. The liquid crystal display panel 51 displays vehicle information such as the accumulated travel distance.

  The connection member 52 is made of a metal pin, and one end is electrically connected to the liquid crystal display panel 51 and the other end is electrically connected to the circuit board 20 by solder. The optical sheet 53 is formed by appropriately combining a light diffusion film, a brightness enhancement film, and the like, and is disposed on the rear surface of the liquid crystal display panel 51. The case body 54 is made of a white resin. The liquid crystal display panel 51 is transmitted and illuminated by a light emitting element (not shown) mounted on the front surface of the circuit board 20.

  A feature of the present invention is that the step portion 35b is provided in the vicinity of the design portion 42, and it is possible to prevent the illumination light from being excessively reflected. Further, since the case body 30 is provided with the light shielding portion 35a so as to have a minute gap d with respect to the display plate 40, the pointer-type instrument and the liquid crystal display 50 are arranged close to each other, so that the case body 30 and the liquid crystal display are disposed. Even when the display panel 51 is juxtaposed, the design portion 42 of the display panel 40 can be transmitted and illuminated.

In addition, this invention is not limited to this embodiment, A various deformation | transformation is possible. For example, the liquid crystal display panel 51 may be a TFT liquid crystal display module or an organic EL panel. Moreover, although this embodiment arrange | positions the liquid crystal display 50 in the center of a pair of pointer type meter, it does not need to have a pointer type meter.

10 Pointer 22 Pointer drive unit (pointer drive means)
24 light emitting element 25 light emitting element 30 case body (reflective member)
35 Vertical section
35a Shading part 35b Step part (reflection suppressing part)
40 display board 41 indicator part 42 design part (transmission display part)
51 Liquid crystal display panel (display panel)

Claims (4)

A display plate having a transmissive display portion, a light emitting element that emits illumination light that illuminates and transmits the display plate, and a reflective member that reflects the illumination light to the display plate,
The reflective member has a vertical portion that overlaps the transmissive display portion in front view,
Said vertical portion, said near the transmissive display portion, and a light shielding portion having a small gap between the display panel, the display device characterized by having, a reflection suppressing portion consisting of the step portion. A display plate having a transmissive display portion, a pointer for indicating the display plate, pointer driving means for rotating the pointer, a light emitting element that emits illumination light that illuminates and transmits the display plate, and the illumination light that is displayed on the display plate A reflective member that reflects on a plate, and a display panel arranged in parallel with the reflective member,
A vertical portion overlapping the transmissive display portion in front view;
Said vertical portion, said near the transmissive display portion, and a light shielding portion having a small gap between the display panel, the display device characterized by having, a reflection suppressing portion consisting of the step portion. The display device according to claim 1, wherein the reflection suppression unit includes a gap larger than the gap . Ago Kisuki A display device according to Rukoto said illumination light is formed so as not to affect the display panel 請 Motomeko 2 shall be the features.

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