JP2021012143A - Display device - Google Patents

Abstract

To provide a display device in which light diffusion on a front surface of a display board can be reduced.SOLUTION: A display device comprises at least: a display board 1 that has a light diffusion layer 13 on a front surface; a case member 3 that has a front portion 332 covering a front of the display board 1; and a light source 73 that supplies light to the front portion 332, the front portion 332 has a penetration portion 333 at a position facing the display board 1, and the display board 1 has a light diffusion layer non-forming portion 15 in which the light diffusion layer 13 is not formed, at a position facing the penetration portion 333.SELECTED DRAWING: Figure 5

Description

The present disclosure relates to, for example, a display device including a display board used in an instrument device for a vehicle.

In the conventional display device, as disclosed in Patent Document 1, a light-shielding layer is printed on the front surface of a base material as a base material, and a rough surface overcoat layer having a fine uneven front surface is printed on the front surface thereof. It has a display board to be formed.

Further, in the conventional display device, as disclosed in Patent Document 2, a case (holder) for accommodating a light guide member (lens sheet) is arranged on the front surface of the display plate (dial).

Japanese Unexamined Patent Publication No. 2003-139580 Japanese Unexamined Patent Publication No. 2011-59136

In such a display device, when the case has a through hole for leaking light from the light guide member, the leaked light is diffusely reflected by the rough surface of the overcoat layer of the display plate and is visually recognized by the user. There was a problem such as.

Therefore, an object of the present disclosure is to provide a display device capable of reducing the diffusion of light on the front surface of the display board, which has been made in view of the above problems.

In order to achieve the above object, a display plate 1 having a light diffusion layer 13 on the front surface, a case member 3 having a front portion 332 covering the front of the display plate 1, and a light source 73 for supplying light to the front portion 332. The front portion 332 has a penetrating portion 333 at a position facing the display plate 1, and the display plate 1 forms the light diffusion layer 13 at a position facing the penetrating portion 333. It is characterized by having a light diffusion non-forming portion 15 that is not formed.

The present disclosure can provide a display device capable of reducing the diffusion of light on the front surface of the display board.

The front view of the display device which concerns on embodiment of this disclosure. A cross-sectional view taken along the line AA of FIG. The front view which mainly shows the case of FIG. FIG. 3 is a cross-sectional view taken along the line BB of FIG. FIG. 3 is a cross-sectional view taken along the line CC of FIG. The figure which shows the light path of this disclosure.

The embodiments of the present disclosure will be described with reference to FIGS. 1 to 6, but the present disclosure is not limited to these embodiments, and various modifications can be made without departing from the present disclosure.

In the following, in order to facilitate understanding of the configuration of the display device 100, the direction (first display board 1 side) in which the driver seated in the vehicle driver's seat is viewed from the display device 100 is set to each member. The front (front) and the opposite side (circuit board 4 side) are referred to as "rear (rear)", and they are indicated by the arrows "Fr." and "Re." In the figure, respectively. In addition, "up", "bottom", "left", and "right" will be appropriately described as arrows "To.", "Bo.", "L", and "R" in the figure.

The vehicle display device 100 according to the embodiment of the present disclosure is mounted on a vehicle (for example, an automobile) and is configured as an instrument device that displays a predetermined measured amount (vehicle speed, etc.).

As shown in FIGS. 1 and 2, the display device 100 includes a first display board (display board) 1, a second display board 2, a case member 3, a circuit board 4, a display 5, and a light guide body. It mainly has 6, a light source 7, a pointer 8, and a return 9.

As shown in FIG. 4, the first display plate 1 is formed by forming various printing layers on the front and rear surfaces of a base material 11 made of a translucent synthetic resin (for example, polycarbonate) molded into a thin plate shape. .. The first display plate 1 has a light-shielding layer 12 on which a light-shielding ink such as black is printed on the back surface of the base material 11, and an overcoat layer (light diffusion) on which a transparent translucent ink is printed on the front surface of the base material 11. Layer) 13 and.

The light-shielding layer 12 has an index unit 121, a perspective window 122, and an indicator 123. The index unit 121 is formed by printing a light-shielding layer 12 on a design such as a scale or a number indicated by the pointer 8. The see-through window 122 is formed by punching out and printing a light-shielding layer 12 in a substantially rectangular shape at a position facing the display unit 511 of the display device 5. The indicator 123 is formed by printing a light-shielding layer 12 on the design of various operation lights and warning lights such as a turn and a high beam.

The overcoat layer 13 is formed on a rough surface having a front surface formed of fine irregularities. The overcoat layer 13 is formed over the entire area of the first display plate 1, and is formed on the front surface of the index portion 121, the perspective window 122, and the indicator 123.

As shown in FIG. 5, the second display plate 2 is formed by forming various printing layers on the front and back surfaces of a base material 21 made of a translucent synthetic resin (for example, polycarbonate) formed into a thin plate shape. The second display board 2 has a light-shielding layer 22 on which a light-shielding ink such as black is formed on the front surface. The light-shielding layer 22 has a decorative design portion 221. The decorative design unit 221 is formed by printing a light-shielding layer 22 on a rectangular design.

A plurality of light sources 7 are mounted on the front surface side of the circuit board 4. The light source 7 has a first light source 71, a second light source 72, and a third light source (light source) 73.

The first light source 71 and the second light source 72 include, for example, a front-mounted LED (Light Emitting Diode) of a predetermined color. The third light source 73 is composed of, for example, a front-mounted LED having three primary colors of RGB (RED, GREEN, BLUE). The light emitted by the first light source 71 causes the index unit 121 and the pointer 8 to emit light. The light emitted by the second light source 72 causes the indicator 123 to emit light. The light emitted by the third light source 73 supplies light to the front portion 332, which will be described later, via the light guide body 6 to cause the decorative design portion 221 to emit light.

The case member 3 is made of a white synthetic resin (for example, polypropylene) and supports the first display plate 1 on the front surface. The case member 3 has a first lighting chamber 31, a second lighting chamber 32, a third lighting chamber 33, an accommodating portion 34, a mounting portion 35, and a receiving portion 36.

The first lighting chamber 31 is formed so as to surround the plurality of first light sources 71, and guides the light of the first light source 71 to the index unit 121 and the pointer 8. The second lighting chamber 32 is formed in a tubular shape so as to surround the second light source 72, and guides the light of the second light source 72 to the indicator 123. The third lighting chamber 33 accommodates the light guide body 6 inside, and guides the light of the third light source 73 to the decorative design unit 221.

As shown in FIGS. 4 and 5, the third lighting chamber 33 is composed of a rear portion 331 and a front portion 332. The rear portion 331 is formed in a tubular shape so as to surround each of the two third light sources 73, and is arranged at a position that does not support the first display plate 1. One end of the rear portion 331 is in contact with the circuit board 4, and the other end is located at the same height as the first display plate 1.

The front portion 332 projects from the front side of the rear portion 331 to the front of the first display plate 1. The front portion 332 extends so as to overlap the front surface of the first display plate 1, and is formed so as to overlap with the accommodating portion 34. The front portion 332 is formed so as to connect the two rear portions 331. In this way, the front portion 332 is formed so as to cover a part of the first display plate 1 and a part of the accommodating portion 34 from the front.

The front portion 332 has a through hole (penetration portion) 333. The through hole 333 is a through hole formed at a position facing the receiving portion 36 so that the receiving portion 36 can be visually recognized from the front. Further, the through hole 333 is a hole provided for forming the receiving portion 36 in the mold which is opened in the front-rear direction to form the case member 3.

The second display board 2 is arranged so as to cover the front side of the front portion 332. The front portion 332 supports the second display plate 2 behind.

The accommodating portion 34 is formed in a rectangular tubular shape, and accommodates the display 5 inside. The mounting portion 35 is a front portion of the case member 3 and supports the first display plate 1 behind.

The receiving portion 36 projects from the wall of the accommodating portion 34 toward the display 5. The receiving portion 36 is arranged at a position behind the front portion 332 and behind the first display plate 1, and supports the back of the first display plate 1. The outer peripheral end surface 14 of the first display plate 1 is supported between the back of the front portion 332 and the front surface of the receiving portion 36. As a result, the first display plate 1 is arranged at a position facing the through hole 333.

The circuit board 4 is made of, for example, a hard wiring board having a wiring pattern applied to a glass epoxy base material, and electronic components are conductively connected (arranged) to the wiring pattern. The electronic components include, for example, a drive main body for driving the pointer 8, a light source 7, a plurality of IC (Integrated circuit) chips 41, a resistor, a capacitor, and the like.

The IC chip 41 is a thin rectangular microchip and is mounted on the back side of the circuit board 4. The IC chip 41 functions as a GDC (Graphics Display Controller: drawing control controller), a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory), and is output from the IC chip 41. The drive main body, the light source 7, the display 5, and the like are driven and controlled based on the control signal.

The display 5 is arranged behind the first display board 1, and is a metal case that houses the liquid crystal display panel 51, the backlight unit 52 that transmits and illuminates the liquid crystal display panel 51, and the liquid crystal display panel 51 and the backlight unit 52. It is equipped with 53. The liquid crystal display panel 51 has a polarizing member attached to the front and rear surfaces of a TFT type color LCD cell, and can display various vehicle information such as a speedometer, an odometer, a fuel consumption meter, and a time as an image. A unit 511 is provided. The display unit 511 is visible to the viewer through the perspective window 122.

The light guide body 6 is made of a translucent synthetic resin (for example, acrylic) containing a light diffusing material. As shown in FIGS. 4, 5 and 6, the light guide body 6 is housed in the third lighting chamber 33 and has a light receiving unit 61 and an emitting unit 62. The light receiving unit 61 is arranged at a position facing the third light source 73, and receives light from the third light source 73. The light receiving portion 61 is formed at two locations. The light receiving unit 61 has a first reflecting unit 611 that reflects the light received from behind toward the emitting unit 62.

The emitting unit 62 is formed so as to connect two light receiving units 61. The exit portion 62 is arranged at a position facing the decorative design portion 221. The through hole 333 is formed behind the exit portion 62. The emitting unit 62 reflects the light from the light receiving unit 61 toward the emitting unit 62 behind the decorative design unit 221 and the light from the second reflecting unit 621 to be reflected in the decorative design unit 621. It has a third reflecting portion 622 that reflects toward 221.

The pointer 8 has an indicator 81 made of a translucent resin (for example, polycarbonate) and a pointer cap 82 made of an opaque resin (for example, ABS). The pointer 8 is connected to the rotation shaft of the drive body, and the index unit 121 is instructed by the instruction unit 81. The drive main body is composed of a movable magnet type drive main body, a stepping motor, or the like, and is mounted behind the circuit board 4, and the rotation shaft projects forward. The display device 100 constitutes an analog tachometer by the pointer 8 and the index unit 121.

The facing 9 is made of a black synthetic resin (for example, polypropylene). The facing 9 is arranged in front of the first display board 1 and the second display board 2, and covers the visible region of the display device 100, that is, the pointer 8, the index unit 121, the perspective window 122, the indicator 123, and the decorative design unit 221. Be exposed. Further, on the front side of the dial 9, for example, a transparent or translucent fluoroscopic panel (not shown) formed in a curved shape is arranged.

As shown in FIG. 5, the first display plate 1 has an overcoat non-forming portion (light diffusion non-forming portion) 15 on which the overcoat layer 13 is not printed on the front surface. That is, the overcoat non-forming portion 15 does not have a printing layer, and the front side of the base material 11 is exposed. The overcoat non-forming portion 15 is formed slightly inside the range (position) facing the front portion 332, so that the overcoat non-forming portion 15 is formed in a range that is not visible to the user. The overcoat non-forming portion 15 is formed in a range including a range (position) facing the through hole 333.

By being formed in this way, as shown in FIG. 6, the light L1 reflected by the second reflecting portion 621 reaches the emitting portion 62 on the front surface of the through hole 333, and a part thereof is behind the emitting portion 62. Leaks from. The light L2 leaking from the exit portion 62 passes through the through hole 333 and is irradiated to the front surface of the first display plate 1.

When the overcoat layer 13 is formed on the front surface of the first display plate 1 facing the through hole 333, the light L2 passing through the through hole 333 is diffused and reflected by the rough surface of the overcoat layer 13. It becomes diffused light L3. When the diffused light L3 is reflected toward the perspective window 122, it is irradiated to the outside of the front portion 332, which causes a problem that the user can see it.

However, in the present embodiment, the front surface of the first display plate 1 facing the through hole 333 is the overcoat non-forming portion 15, and the light L2 irradiated to the front surface of the first display plate 1 is diffused by the base material 11. The linear light L4 is reflected without being reflected. Since the linear light L4 is then attenuated while being reflected between the back surface 334 of the front portion 332 and the overcoat non-forming portion 15, it is not visible to the user.

The present disclosure is not limited to the above-described embodiment, and various modifications can be made within the scope of the gist of the present disclosure. For example, in the present embodiment described above, the display 5 which is a display means of the display device may be an organic EL (Electroluminescence) module. Further, the overcoat non-forming portion 15 does not have a printing layer, and the front side of the base material 11 is in an exposed state, but it may be any as long as it reflects light without diffusing it, for example, glossy black. It may have a print layer of.

The present disclosure relates to a display device for a vehicle, and can be applied to, for example, a display device for a vehicle mounted on a moving body including an automobile, a motorcycle, or an agricultural machine or a construction machine.

1 1st display board (display board)
11 Base material 12 Light-shielding layer 13 Overcoat layer (light diffusion layer)
15 Overcoat non-forming part (light diffusion non-forming part)
2 2nd display board 3 Case member 33 3rd lighting room 331 Rear part 332 Front part 333 Through hole (through part)
34 Accommodating part 36 Receiving part 4 Circuit board 5 Display member 6 Light guide 7 Light source 71 First light source 72 Second light source 73 Third light source (light source)
8 Guideline 9 Looking back

Claims (5)

A display board with a light diffusion layer on the front and
A case member having a front portion that covers the front of the display plate,
A light source that supplies light to the front portion is provided at least.
The front portion has a penetrating portion at a position facing the display plate.
The display device is a display device having a light diffusion non-forming portion in which the light diffusion layer is not formed at a position facing the penetrating portion. The display device according to claim 1, wherein the light diffusion non-forming portion is a base material of the display board. The display device according to claim 2, wherein the display board has a black printing layer on a rear surface facing the light diffusion non-forming portion. The display device according to claim 1, wherein the light diffusion non-forming portion has a black print layer. The display device according to claim 1, wherein the light diffusion non-forming portion is formed at a position facing the front portion.

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