Display device for vehicle

Abstract

To provide a display device for vehicle by which a display function is easily adjusted.SOLUTION: A display device for vehicle 1 includes: a case 9 having an opening 31 extending through a wall portion 30; a light source 20 disposed inside the case 9 and configured to emit illumination light L toward the opening 31; a dial plate 5 disposed so as to cover an opening side including the opening 31 and configured to transmit the illumination light L incident from the light source 20 toward an outer side of the case 9; and a small dial-plate for adjustment 40 accommodated inside the opening 31 on an optical path between the light source 20 and the dial plate 5 and configured to adjust and transmit the illumination light L incident from the light source 20 toward the dial plate 5. The case 9 has a holding portion 33 that holds the small dial-plate for adjustment 40 accommodated inside the opening 31. The small dial-plate for adjustment 40 is configured by combining one or more luminance adjustment plates 41 that adjust luminance of the illumination light L and one or more tint adjustment plates 42 that adjust tint of the illumination light.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a vehicle display device.

Background Art

[0002] Conventional vehicle display devices have a display function such as an indicator, for example. The brightness and color tone of the indicator are determined by an LED lighting circuit mounted on a PCB (printed circuit board), the lighting range is determined by the shape of a lamp house formed in a case, and the display shape and range are determined by a dial plate (see, for example, Patent Documents 1 to 3).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when changing the brightness and color tone of an indicator or the like in a vehicle display device, it is usually necessary to adjust the resistance value of a limiting resistor in the LED lighting circuit or change the LED components, etc., which involves design changes and component mounting changes. Therefore, there is room for improvement in terms of ease of adjusting the brightness and color tone. Also, although it is possible to adjust the brightness and color tone by changing the printing color of the dial plate, there is room for improvement because the dial plate needs to be redesigned or components changed each time adjustment is made.

[0005] An object of the present invention is to provide a vehicle display device that enables easy adjustment of the display function.

Means for Solving the Problems

[0006] In order to achieve the above object, a display device for a vehicle according to the present invention includes a housing having an opening penetrating a wall portion, a light source disposed inside the housing and emitting illumination light toward the opening, a light guide plate disposed so as to cover a surface on the opening side including the opening and transmitting the illumination light incident from the light source to the outside of the housing, and an adjustment small light guide plate disposed on the optical path between the light source and the light guide plate and accommodated inside the opening, for adjusting the illumination light incident from the light source and transmitting it toward the light guide plate. The housing is provided on the wall portion and has a holding portion for holding the adjustment small light guide plate accommodated inside the opening. The adjustment small light guide plate is configured by combining one or more luminance adjustment plates for adjusting the luminance of the illumination light and one or more color adjustment plates for adjusting the color tone of the illumination light.

Advantages of the Invention

[0007] According to the display device for a vehicle according to the present invention, there is an effect that adjustment of a display function such as an indicator becomes easy.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited by the following embodiments. That is, the components in the following embodiments include those that can be easily assumed by those skilled in the art or substantially the same ones, and various omissions, replacements, and changes can be made without departing from the gist of the invention.

[0010] [Embodiment] FIG. 1 is a plan view showing a schematic configuration of a vehicle display device according to the embodiment. FIG. 2 is an exploded perspective view showing a schematic configuration of the vehicle display device according to the embodiment. FIG. 3 is a schematic diagram schematically showing a cross-section of an indicator of the vehicle display device according to the embodiment. FIG. 4 is a schematic diagram schematically showing a plan view of the indicator of the vehicle display device according to the embodiment. FIG. 5 is a schematic diagram showing a schematic configuration of an adjustment small character plate according to the embodiment. FIG. 6 is a schematic diagram showing a state at the initial stage of assembling the adjustment small character plate according to the embodiment. FIG. 7 is a schematic diagram showing a state during the assembly of the adjustment small character plate according to the embodiment. FIG. 8 is a schematic diagram showing a state after the assembly of the adjustment small character plate according to the embodiment. Note that in FIG. 4, the character plate 5 constituting a part of the vehicle display device is omitted.

[0011] The vehicular display device 1 according to this embodiment is mounted on an instrument panel provided on the dashboard of a vehicle such as an automobile, and displays various information used for driving the vehicle. As a function of providing various information related to the vehicle, the vehicular display device 1 has an indicator IN, as shown in FIG. 1. In the following description, one side of the vehicular display device 1 in the depth direction X will be referred to as the "front side X1," and the other side will be referred to as the "rear side X2." The vehicular display device 1 is disposed with the front side X1 facing the vehicle interior (not shown) or the driver inside the vehicle interior.

[0012] 2, the vehicle display device 1 includes a front glass 2, an end cover 3, hands 4, a dial 5, a knob 6, an LCD 7, an LCD diffusion plate 8, a case 9, a PCB 10, and a rear cover 11. The vehicle display device 1 has a structure in which the front glass 2, end cover 3, hands 4, a dial 5, a knob 6, an LCD 7, an LCD diffusion plate 8, a case 9, a PCB 10, and a rear cover 11 are layered in this order from the front side X1 to the rear side X2.

[0013] The crystal 2 is formed of a light-transmitting material that transmits light so that the dial 5 and the like can be seen, and is provided on the front side X1 of the end cover 3 so as to overlap it.

[0014] The end cover 3 is a frame-shaped member that surrounds the periphery of the dial 5 and holds the dial 5 in place, and is provided on the front side X1 of the dial 5.

[0015] The hands 4 are needle-shaped members for indicating various vehicle-related measurement values. The hands 4 are arranged on the front side X1 of the dial 5 and are driven by a drive unit (not shown) arranged inside the case 9.

[0016] The character plate 5 is a plate-shaped member on which various patterns, symbols, character strings, etc. corresponding to the vehicle information to be displayed are drawn, and is provided on the front side X1 of the case 9. The character plate 5 is formed in a substantially rectangular shape when viewed from the depth direction X. The character plate 5 is, for example, a polycarbonate sheet of transparent fabric, and printing is performed by using a dark-colored ink to cut out a shape corresponding to the above-mentioned pattern, symbol, character string, etc., so that the above-mentioned pattern, symbol, character string, etc. are drawn.

[0017] The character plate 5 of the present embodiment is arranged to cover the opening surface 30a on the opening side including the opening 31 provided in the case 9, and transmits the illumination light L incident from the light source 20 mounted on the PCB 10 toward the outside of the case 9. In the portion of the character plate 5 where patterns, symbols, character strings, etc. are drawn, the illumination light L is transmitted, so that the patterns, symbols, character strings, etc. are lit and displayed (indicator display).

[0018] The knob 6 is composed of a plurality of rod-shaped members or the like and is a so-called trip knob. The tip of the knob 6 on the front side X1 penetrates the front glass 2 and protrudes toward the passenger compartment side.

[0019] The LCD 7 is a liquid crystal display device such as a TFT-LCD (Thin Film Transistor-Liquid Crystal Display) whose display surface is exposed on the front side X1 through an opening provided in the character plate 5. The LCD 7 displays various patterns, symbols, character strings, etc. corresponding to the vehicle information on the display surface.

[0020] The LCD diffusion plate 8 is arranged on the back side X2 with respect to the LCD 7, and diffuses the light incident from a light source (not shown) corresponding to the LCD 7 and emits it toward the LCD 7.

[0021] The case 9 is formed of an opaque resin material or the like, and together with the back cover 11, constitutes the housing of the vehicle display device 1. The case 9, together with the back cover 11, houses and holds members and devices including the knob 6, the LCD 7, the LCD diffusion plate 8, and the PCB 10 inside.

[0022] The PCB 10 is a printed circuit board and is arranged on the back side X2 of the case 9 as shown in FIG. 2. On the front side X1 of the PCB 10, a light source 20, a resistor 21, etc. are mounted. The light source 20 is composed of, for example, an LED chip. As shown in FIG. 3, the light source 20 is arranged inside the case 9 including the back cover 11 and emits illumination light L toward the dial 5 side in the optical axis direction XA. In other words, the light source 20 emits illumination light L toward the dial 5 side in the optical axis direction XA through the opening 31 provided in the wall portion 30 of the case 9.

[0023] The back cover 11 is provided on the back side of the PCB 10 and is formed of an opaque resin material or the like. Together with the case 9, it constitutes the housing of the vehicle display device 1.

[0024] Next, the indicator IN in the vehicle display device 1 will be described. The indicator IN of the present embodiment is not determined by the LED lighting circuit mounted on the PCB 10 in terms of brightness and color tone, but is determined by the adjustment small dial 40 described later. Also, the illumination range of the indicator IN is determined by the lamp house shape formed in the case 9, and the display shape and range are determined by the dial 5, having such a structure. The lamp house shape means, as shown in FIG. 3, for example, a structure that narrows from the dial 5 side toward the light source 20 side along the optical axis direction XA.

[0025] The case 9 of the present embodiment has a wall portion 30 provided between the dial 5 and the light source 20 as shown in FIG. 3. The wall portion 30 is formed to extend in a direction perpendicular to the optical axis direction XA and has an opening 31 and a holding portion 33 as shown in FIGS. 3 and 4. Here, the optical axis direction XA is the plate thickness direction of the wall portion 30 and is the optical axis direction of the illumination light L emitted from the light source 20 toward the dial 5.

[0026] As shown in FIG. 3, the opening 31 penetrates the wall portion 30 in the optical axis direction XA. The opening 31 is formed in the shape of a lamp house, and has a shape in which the cross-section viewed from a direction orthogonal to the optical axis direction XA is narrowed from the dial 5 side toward the light source 20 side. The opening 31 has an inner peripheral surface 32 that forms the optical path of the illumination light L.

[0027] As shown in FIG. 3, the inner peripheral surface 32 is composed of a first inner peripheral surface 32a, a second inner peripheral surface 32b, and a contact surface 35. The inner peripheral surface 32 is formed in the order of the first inner peripheral surface 32a, the contact surface 35, and the second inner peripheral surface 32b from the dial 5 side toward the light source 20 side in the optical axis direction XA. The shapes of the first inner peripheral surface 32a, the second inner peripheral surface 32b, and the contact surface 35 are formed in the shape of a lamp house as a whole. That is, both the first inner peripheral surface 32a and the second inner peripheral surface 32b are formed parallel to the optical axis direction XA. On the other hand, the contact surface 35 is formed along a direction intersecting the optical axis direction XA. Specifically, the contact surface 35 is interposed between the first inner peripheral surface 32a and the second inner peripheral surface 32b when viewed from a direction orthogonal to the axial direction XA, and is inclined so as to widen in the width direction orthogonal to the optical axis direction XA from the light source 20 side toward the dial 5 side.

[0028] The holding portion 33 is configured to be detachable from the adjustment piece dial 40, and holds the adjustment piece dial 40 housed inside the opening 31 as shown in FIG. 3. Here, the adjustment piece dial 40 is an adjustment plate for adjusting the luminance and color tone with respect to the display of the indicator IN. The holding portion 33 has a regulating piece 34 and a contact surface 35, and holds the adjustment piece dial 40 between the regulating piece 34 and the contact surface 35.

[0029] As shown in FIG. 3, the regulating piece 34 projects from the inner peripheral surface 32 of the opening 31 toward the adjusting small piece character plate 40 in the holding state where the holding portion 33 holds the adjusting small piece character plate 40, and is formed along the circumferential direction of the inner peripheral surface 32 to restrict the movement of the adjusting small piece character plate 40 to the outside of the opening 31. In the above holding state, the regulating piece 34 is formed to project from the edge on the character plate 5 side of the first inner peripheral surface 32a of the inner peripheral surface 32 toward the adjusting small piece character plate 40. The regulating piece 34 is formed in an annular shape when viewed from the optical axis direction XA, and the tip side constitutes the character plate side opening edge 31a. As shown in FIG. 4, when viewed from the optical axis direction XA, the size of the character plate side opening edge 31a is larger than the size of the adjusting small piece character plate 40 and smaller than the size inside the first inner peripheral surface 32a. The regulating piece 34 is formed in a plate shape and is supported in a cantilever manner so that the tip side can be elastically deformed along the optical axis direction XA with respect to the first inner peripheral surface 32a.

[0030] The contact surface 35 is formed on the inner peripheral surface 32 of the opening 31 in the holding state where the holding portion 33 holds the adjusting small piece character plate 40, facing the optical axis direction XA of the optical path with the adjusting small piece character plate 40 interposed between it and the regulating piece 34, and contacts the adjusting small piece character plate 40. In the above holding state, the contact surface 35 is inclined toward the adjusting small piece character plate 40 from the first inner peripheral surface 32a side toward the second inner peripheral surface 32b side along the optical axis direction XA.

[0031] The adjusting small piece character plate 40 is formed according to the structure of the holding portion 33 and is formed in a substantially rectangular shape when viewed from the optical axis direction XA. The adjusting small piece character plate 40 is, for example, a plate-like member that bends in the optical axis direction XA due to elastic deformation in the holding state where the holding portion 33 holds the adjusting small piece character plate 40. As shown in FIG. 5, the adjusting small piece character plate 40 is constituted by combining a luminance adjusting plate 41 for adjusting the luminance of the illumination light L and a color tone adjusting plate 42 for adjusting the color tone of the illumination light.

[0032] The brightness adjustment plate 41 is formed in a flat plate shape and is configured by printing smoke density. In this embodiment, as the brightness adjustment plate 41, a plurality of types of brightness adjustment plates 41 with different densities (for example, the brightness adjustment plates 41A and 41B shown in FIG. 5) are prepared, so that it is possible to select and use the optimal one according to the specifications and design requirements of the vehicle display device 1 actually applied. The brightness adjustment plate 41 is composed of a member that elastically deforms and bends due to the pressing force on the central portion of the brightness adjustment plate 41.

[0033] The color tone adjustment plate 42 is formed in a flat plate shape and is configured by printing colors. In this embodiment, as the color tone adjustment plate 42, a plurality of types of color tone adjustment plates 42 with different color tones (for example, the color tone adjustment plates 42A, 42B, and 42C shown in FIG. 5) are prepared, so that it is possible to select and use the optimal one according to the specifications and design requirements of the vehicle display device 1 actually applied. The color tone adjustment plate 42 is composed of a member that elastically deforms and bends due to the pressing force on the central portion of the color tone adjustment plate 42.

[0034] Next, the method of attaching and detaching the adjustment small piece character plate 40 to the holding portion 33 of the vehicle display device 1 will be described with reference to FIGS. 6 to 8. The attaching and detaching method described below will be described as being performed by an operator (hereinafter simply referred to as "operator") who adjusts the brightness and color tone of the indicator IN, for example, but is not limited thereto, and may be performed using a device, a jig, or the like.

[0035] First, the method of attaching the adjustment small piece character plate 40 to the holding portion 33 will be described. As shown in FIG. 6, the operator arranges the adjustment small piece character plate 40 so as to cover the opening surface 30a on the opening side including the opening 31.

[0036] Next, as shown in Fig. 7, the worker bends the adjustment-piece dial 40 by pushing approximately the center of the adjustment-piece dial 40 toward the light source 20 in the optical axis direction XA. As the adjustment-piece dial 40 elastically deforms and bends, the end of the adjustment-piece dial 40 in its extending direction moves over the restricting piece 34 toward the light source 20 (Fig. 8). In this way, the adjustment-piece dial 40 bends due to the pressing force from the outside to the inside of the wall 30 relative to the opening 31, and moves over the restricting piece 34 to be pressed into the retaining portion 33. As a result, the adjustment-piece dial 40 is held between the restricting piece 34 and the abutment surface 35 that constitute the retaining portion 33.

[0037] On the other hand, to remove the small adjustment piece dial 40 from the holder 33, the worker bends the small adjustment piece dial 40 while pushing approximately the center of the small adjustment piece dial 40 toward the dial 5 in the optical axis direction XA. As the small adjustment piece dial 40 bends due to elastic deformation, the end of the small adjustment piece dial 40 in the extension direction moves over the restricting piece 34 toward the dial 5. In this way, the small adjustment piece dial 40 bends due to the pressing force from the inside to the outside of the wall 30 against the opening 31, and moves over the restricting piece 34 to be removed from the holder 33.

[0038] As described above, the vehicle display device 1 according to this embodiment includes a case 9 having an opening 31 penetrating a wall 30, a light source 20 disposed inside the case 9 and emitting illumination light L toward the opening 31, a dial 5 disposed to cover the opening side including the opening 31 and transmitting the illumination light L incident from the light source 20 toward the outside of the case 9, and an adjustment small dial plate 40 disposed on the optical path between the light source 20 and the dial 5 and housed inside the opening 31, adjusting the illumination light L incident from the light source 20 and transmitting it toward the dial 5. The case 9 has a holder 33 for holding the adjustment small dial plate 40 housed inside the opening 31. The adjustment small dial plate 40 is configured by combining a brightness adjustment plate 41 that adjusts the brightness of the illumination light L and a color adjustment plate 42 that adjusts the color of the illumination light.

[0039] By virtue of the above configuration, the vehicle display device 1 can easily change the luminance and color tone of the illumination light L, for example, by replacing the adjustment small scale plate 40 without adjusting the resistance value of the limiting resistor in the LED circuit or changing the LED components. As a result, the vehicle display device 1 can easily adjust the display function without redesigning the scale plate 5 or changing the LED components. Further, since the adjustment small scale plate 40 is configured by combining the luminance adjustment plate 41 and the color tone adjustment plate 42, by preparing a plurality of types of luminance adjustment plates 41 and color tone adjustment plates 42, it is possible to select and use an optimal one according to the specifications and design requirements of the vehicle display device 1.

[0040] In addition, in the vehicle display device 1 according to the present embodiment, the luminance adjustment plate 41 is configured by printing different shades of smoke, and the color tone adjustment plate 42 is configured by printing different colors. Thereby, the vehicle display device 1 can easily adjust the luminance of the illumination light L by preparing a plurality of luminance adjustment plates 41 with different shades of smoke, and can easily adjust the color tone of the illumination light L by preparing a plurality of color tone adjustment plates 42 with different colors.

[0041] In addition, in the vehicle display device 1 according to the present embodiment, the holding portion 33 protrudes from the inner peripheral surface 32 of the opening portion 31 toward the adjustment small scale plate 40 side in a holding state where the holding portion 33 holds the adjustment small scale plate 40, and is formed along the circumferential direction of the inner peripheral surface 32, and has a restricting piece 34 that restricts the movement of the adjustment small scale plate 40 to the outside of the opening portion 31. Thereby, the vehicle display device 1 can restrict the movement of the adjustment small scale plate 40 to the outside of the opening portion 31 in a holding state where the holding portion 33 holds the adjustment small scale plate 40.

[0042] In addition, in the holding state, the vehicle display device 1 according to the present embodiment has a contact surface 35 formed on the inner peripheral surface 32 of the opening 31 so as to face the adjustment small piece character plate 40 in the optical axis direction XA with the regulation piece 34 interposed therebetween. As a result, the vehicle display device 1 can hold the adjustment small piece character plate 40 by the holding portion 33 while the inner peripheral surface 32 of the opening 31 maintains the lamp house shape.

[0043] Further, in the vehicle display device 1 according to the present embodiment, the adjustment small piece character plate 40 is bent by the pressing force from the outside to the inside of the wall portion 30 with respect to the opening 31, thereby straddling the regulation piece 34 and being press-fitted into the holding portion 33. As a result, the operator of the vehicle display device 1 can easily attach the adjustment small piece character plate 40 to the holding portion 33.

[0044] In the above embodiment, the brightness adjustment plate 41 is configured as a single plate, but may be configured by combining a plurality of brightness adjustment plates 41A and 41B having different shades. The color tone adjustment plate 42 is configured as a single plate, but may be formed by combining three color tone adjustment plates 42A, 42B, and 42C having different color tones.

[0045] In the above embodiment, the wall portion 30 of the case 9 has a structure that narrows from the character plate 5 side toward the light source 20 side along the optical axis direction XA as a lamp house shape. However, depending on the shape of the indicator IN and the optical characteristics of the LED that is the light source 20, etc., it may not be necessary to have a narrowing structure.

Explanation of Reference Numerals

[0046] 1 Vehicle display device 9 Case 20 Light source 30 Wall portion 31 Opening 32 Inner peripheral surface 33 Holding portion 34 Regulation piece 35 Contact surface 40 Adjustment small piece character plate 41 Brightness adjustment plate 42-color tone adjustment plate IN indicator

Claims

1. A housing having an opening penetrating through a wall portion, A light source disposed inside the housing and emitting illumination light toward the opening, A light guide plate disposed so as to cover a surface on the opening side including the opening, and transmitting the illumination light incident from the light source toward the outside of the housing, An adjustment small light guide plate that is on the optical path between the light source and the light guide plate and is housed inside the opening, and adjusts the illumination light incident from the light source and transmits it toward the light guide plate, and The housing, Has a holding portion provided on the wall portion and holding the adjustment small light guide plate housed inside the opening, The adjustment small light guide plate, Is configured by combining one or more luminance adjustment plates that adjust the luminance of the illumination light and one or more color tone adjustment plates that adjust the color tone of the illumination light A vehicle display device characterized by the above.

2. The luminance adjustment plate, Is configured by a plate on which smoke density is printed, The color tone adjustment plate, Is configured by a plate on which a color is printed The vehicle display device according to Claim 1.

3. The holding portion, In a holding state where the holding portion holds the adjustment small light guide plate, it protrudes from the inner peripheral surface of the opening toward the adjustment small light guide plate side and is formed along the circumferential direction of the inner peripheral surface, and regulates the movement of the adjustment small light guide plate to the outside of the opening. A regulating piece, In the holding state, on the inner peripheral surface of the opening, there is a contact surface that is formed to face the adjustment small light guide plate in the optical axis direction of the optical path with the adjustment small light guide plate sandwiched between the regulating piece and contacts the adjustment small light guide plate, Holds the adjustment small light guide plate between the regulating piece and the contact surface The vehicle display device according to Claim 1 or 2.

4. The adjustment small light guide plate, By bending due to a pressing force from the outside to the inside of the wall portion with respect to the opening, it climbs over the regulating piece and is press-fitted into the holding portion The vehicle display device according to Claim 3.

Images