JP2015011827A - Display member and display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display member and a display device capable of fresh expression in accordance with lighting of a light source.SOLUTION: A light guide letter board 10 includes a planar light guide part 11 which guides first light La taken-in from an inner wall light incident part 111a, a design display part 12 which is formed on the surface side of the light guide part 11 and has a light shielding part 12a for expressing a first design, a first low refractive index part 13 which is formed between the light guide part 11 and the design display part 12 and has a refractive index of light lower than the light guide part 11, a ground part 14 which is formed on the back surface side of the light guide part 11, is diffused by light guided by the light guide part 11 and expresses a back ground of colors different from the first design and a second low refractive index part 15 having a light adjustment part 15a which is formed between the light guide part 11 and the ground part 14 and changes outgoing efficiency of light together with the ground part 11 and a pattern part 15b which expresses a second design different from the first design.

Description

  The present invention relates to a display member that guides light emitted from a light source by a light guide unit to illuminate a design display unit and the like, and a display device including the display member.

A conventional display member is disclosed in Patent Document 1, for example, and guides light emitted from a light source, and emits light from a light transmitting and emitting part formed at a cutout portion of a light shielding layer printed on the surface. Thus, a light guide plate that displays a predetermined design, and a light diffusing portion is provided at a location corresponding to the design display portion, and light is diffused only at a location corresponding to the light transmitting and emitting portion by the light diffusing portion. Light is emitted from the light transmission / emission part, and light is not diffused at locations that do not correspond to the light transmission / emission part, so that light is not emitted from other than the light transmission / emission part, and light is efficiently guided even with a small number of light sources The light is guided in the unit, and even a design away from the light source is displayed brightly.
Further, Patent Document 2 includes a display light adjusting unit that includes a light diffusing unit and a light-adjusting low-refractive-index unit in a region corresponding to the light transmitting and emitting unit and changes the light emission efficiency. It is disclosed.

Japanese Patent Application Laid-Open No. 2011-237692 JP 2012-136199 A

  However, the conventional display member simply transmits the design composed of the light transmitting and emitting portion on the dark background as the light source is turned on, and the change accompanying the lighting of the light source is monotonous and innovative. There was still room for improvement in terms of realizing simple expressions.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a display member and a display device that can solve the above-described problems and can perform a novel expression as the light source is turned on.

In order to solve the above-described problems, the display member of the present invention is
A light-guiding unit that takes light from the light source inside, and a planar light guide unit that guides light taken from the light-receiving unit;
A design display part having a first design part which is formed on the surface side of the light guide part and displays the first design;
A first low refractive index portion formed between the light guide portion and the design display portion and having a light refractive index lower than that of the light guide portion;
A ground part formed on the back side of the light guide part, diffusing the light guided by the light guide part, and representing a background of a color different from the first design;
A light adjusting portion that is formed between the light guide portion and the ground portion, and changes a light emission efficiency together with the ground portion, and a second design portion that represents a second design different from the first design; And a second low refractive index portion having

  In addition, the display device of the present invention includes the display member, a light source that emits light, a pointer that points to the first design portion of the display member, and a control unit that controls the light source and the pointer. A circuit board and a case body that is provided between the circuit board and the display member and supports the display member are provided.

  According to the present invention, a novel expression is possible as the light source is turned on.

It is a disassembled perspective view of the display apparatus in 1st Embodiment of this invention. It is a front view of the light guide dial in the embodiment. It is a front view of the display apparatus in the said embodiment. It is a front view of the case body in the said embodiment. It is sectional drawing of the display apparatus in the said embodiment, and is AA sectional drawing of FIG. It is explanatory drawing of the light guide in the said embodiment, (a) is a perspective view of a light guide, (b) is sectional drawing of the light guide at the time of incorporating in a display apparatus, (c) is It is a figure explaining the shape of the dial direction reflection part of a light guide. It is an expanded sectional view of the display device in the above-mentioned embodiment. It is a front view of the light-guide dial in the said embodiment, (a) is a figure which shows the visual recognition state when a 1st light source is not lighted, (b) is a figure which shows the visual recognition state when a 1st light source is lighted. It is. It is a figure which shows the pattern part which is another example of the 2nd design part of this invention. It is a figure which shows the pattern part which is another example of the 2nd design part of this invention. It is a figure which shows the picture part which is another example of the 2nd design part of this invention.

  Embodiments in which the present invention is applied to a display device mounted on a vehicle will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of a display device 1 according to the present embodiment. The display device 1 includes a light guide dial plate 10, a case body 20, a light guide body 30, a pointer 40, a circuit board 50, a light source 60, a movement 70, a decorative member 80, a display device 90, The pointer 40 is rotated based on a vehicle signal indicating vehicle information such as a vehicle speed and an engine speed output from the vehicle side. Further, the light guide dial 10 and the pointer 40 shine by the light emitted from the light source 60.

(Light guide dial (display member))
First, the light guide dial (display member) 10 will be described with reference to FIGS. FIG. 2 is a front view of the light guide dial 10, and FIG. 3 is a front view of the display device 1.

  The light guide dial plate 10 includes a pointer shaft insertion hole 111 into which a pointer shaft 71 provided in a movement 70 described later is inserted, and a first insertion portion 112 into which a first light shielding wall 23 provided in the case body 20 described later is inserted. And a second insertion portion 113 for inserting a second light shielding wall 24 provided in the case body 20 to be described later.

When the light guide dial plate 10 is placed on the placement portion 22 of the case body 20 (see FIG. 4) described later, the first light shielding wall 23 is inserted into the first insertion portion 112 and the second insertion portion 113 is inserted. The second light shielding wall 24 is inserted.
From the front side of the light guide dial plate 10, the pointer 40 is fitted to the pointer shaft 71 inserted through the pointer shaft insertion hole 111, and the first insertion portion 112 (and the first light shielding wall 23 inserted into the first insertion portion 112). By attaching the ring-shaped decorative member 80 so as to cover the second insertion portion 113 (and the second light shielding wall 24 inserted into the second insertion portion 113), the light guide dial plate 10 is assembled in the display device 1 (FIG. 3).
In the present specification, an area defined by the first insertion portion 112 and the second insertion portion 113 in the light guide dial plate 10 is referred to as an inner display region E1, and is outside the first insertion portion 112 and the second insertion portion 113. The area is expressed as an outer display area E2.
The light guide dial plate 10 does not divide the entire circumference around the pointer shaft insertion hole 111 by the first insertion portion 112, and has a coupling portion 112 a between the first insertion portions 112. Thereby, the inner side display area E1 and the outer side display area E2 of the light guide dial plate 10 can be constituted by continuous members.

  In the light guide dial plate 10, the first light La emitted from the first light source 61 and traveling through the light guide dial plate 10 in the inner display area E <b> 1 represents a dark scale, numerals, etc. (first design). The light is emitted from the background portion 102 excluding the portion (first design portion) 101, and makes the background portion 102 shine. Further, in the outer display area E2, the second light Lb emitted from the second light source 62 disposed on the back surface of the light guide dial 10 shines the first warning portion 103 representing the seat belt indicator. Further, a second warning portion 104 representing a side brake indicator is provided in the inner display area E1, and the third light Lc emitted from the third light source 63 disposed on the back surface of the light guide dial 10 is provided. Illuminates the second warning unit 104. The inner display area E1 is provided with a translucent display window 105 that allows the display on the display 90 disposed on the back surface of the light guide dial 10 to be visually recognized. The light guide dial 10 transmits information to the viewer through the scale unit 101, the first warning unit 103, the second warning unit 104, and the display window 105. In addition, the effect | action in the display apparatus 1 of the light guide dial 10 and a specific structure are demonstrated later.

(Case body)
Next, the case body 20 in the present embodiment will be described with reference to FIGS. 4 and 5. 4 is a front view of the case body 20, and FIG. 5 is a cross-sectional view of the display device 1 according to the present embodiment, and is a cross-sectional view taken along line AA in FIG.

The case body 20 is made of, for example, a white synthetic resin material, and is disposed between the light guide dial plate 10 and a circuit board 50 described later, and supports and fixes the light guide dial plate 10.
As shown in FIG. 4, the case body 20 includes a first partition portion 21 including a through hole that partitions the first light source 61 and the light guide body 30, a placement portion 22 on which the light guide dial 10 is placed, A first light shielding wall 23 that is formed in an arc shape with the first partition 21 as the center and protrudes from the mounting portion 22 on the front side (viewer side), and a gap that is a gap between the first light shielding walls 23. A second partition portion 25 including a notch portion 23a, a second light shielding wall 24 disposed so as to prevent a gap between the notch portions 23a, and a through hole that divides the second light source 62 disposed in the outer display area E2. A third partition portion 26 composed of a through hole that divides the third light source 63 disposed in the inner display area E1, a display device mounting hole 27 composed of a through hole into which a display device 90 such as a liquid crystal panel is inserted, It is what has.

  As shown in FIG. 5, the first partition portion 21 is formed by a through hole, and partitions the first light source 61 and the light guide 30. From the light emitted from the first light source 61 and the light guide 30. It reflects the leaked light.

  The mounting portion 22 is formed so as to be substantially parallel to the light guide dial plate 10 and the circuit board 50, and holds the light guide dial plate 10 in contact with the back surface of the light guide dial plate 10. The mounting portion 22 reflects the first light La leaking from the back surface side of the light guide dial 10, returns it as the first light La into the light guide dial 10, and travels through the light guide dial 10. This prevents the first light La to escape from other than the inner display area E1.

  The first light shielding wall 23 is formed in an arc shape with the first partition portion 21 as a center, protrudes from the mounting portion 22 to the front side, and is inserted into the first insertion portion 112 of the light guide dial 10. .

  As shown in FIG. 5, the first light shielding wall 23 has a first reflection surface 23 p that reflects the first light La traveling in the light guide dial 10 as reflected light Ld. The first reflecting surface 23p reflects the first light La as reflected light Ld in the direction of the light guide dial plate 10, and the reflected light Ld is emitted from the inner display area E1, thereby causing the inner display area E1 to pass through. Brighter and brighter.

  The notch portion 23 a is a gap between the first light shielding walls 23. By providing the notch portion 23 a, the light guide dial plate 10 can be provided with the connecting portion 112 a. The inner display area E1 and the outer display area E2 can be connected by the connecting portion 112a.

  The second light shielding wall 24 is disposed so as to block the gap between the cutout portions 23 a of the case body 20. The second light shielding wall 24 projects from the mounting portion 22 toward the viewer side, and the second insertion of the light guide dial 10 is performed. It is inserted into the part 113. The second light shielding wall 24 has a second reflecting surface (not shown) that reflects the first light La traveling in the light guide dial 10 as reflected light Ld.

  The second partition portion 25 is formed by a through hole that partitions the second light source 62 that illuminates the first warning portion 103 provided in the outer display area E <b> 2 of the light guide dial 10. The second light Lb from is reflected in the direction of the light guide dial 10.

  The third partition portion 26 is formed by a through hole that divides the third light source 63 that illuminates the second warning portion 104 disposed in the inner display area E1 of the light guide dial plate 10. The third light Lc from 63 is reflected in the direction of the light guide dial 10.

  The display device mounting hole 27 is formed as a through hole into which a display device 90 such as a liquid crystal panel is inserted.

(Light guide)
Next, the light guide 30 will be described with reference to FIG.
FIG. 6A is a perspective view of the light guide 30 in the present embodiment, and FIG. 6B is a cross-sectional view of the display device 1 in the present embodiment.
The light guide 30 receives the first light La in the direction of the inner wall light incident part 111a of the light guide dial 10 from a housing part 31 that houses a first light source 61, which will be described later, and a part of the light from the first light source 61. Reflecting by the dial direction reflecting portion 32 that reflects as, the pointer direction emitting portion 33 that emits part of the light of the first light source 61 as the fourth light Le in the direction of the pointer 40, and the dial direction reflecting portion 32 The dial direction emitting part 34 which radiates | emits the 1st light La which carried out to the inner wall light incident part 111a of the light guide dial 10, and the pointer axis | shaft insertion part 35 which the pointer axis | shaft 71 mentioned later penetrates are provided. The light from the first light source 61 is guided to the light guide dial 10 and the pointer 40.

  The storage unit 31 covers the first light source 61 (stores it at a desired position), and takes in more light into the light guide 30 without missing the light emitted from the first light source 61.

As shown in FIG. 6B, the dial direction reflecting portion 32 is formed in a curved surface shape such as a hyperboloid with the center O of the light guide 30 as an axis, and the light incident from the storage portion 31 is converted into a first shape. The light La is reflected in the direction of the dial direction emitting portion 34. In the present embodiment, the dial direction reflecting portion 32 is provided in almost all directions with the center O of the light guide 30 as the center. However, the dial direction reflecting portion is appropriately selected depending on the region where light is to be reflected. The region where 32 is provided may be limited.
Further, as shown in FIG. 6C, the dial direction reflecting portion 32 may be formed in a conical shape or a pyramid surface shape (hexagonal pyramid surface, octagonal pyramid surface, etc.).

  In the dial direction emitting unit 33, the angle when the light traveling in the light guide 30 is incident on the dial direction reflecting unit 32 in the dial direction reflecting unit 32 is less than the critical angle, and the light is in the direction of the pointer 40. This is a portion that is emitted as the fourth light Le. The amount of the fourth light Le emitted from the pointer direction emitting portion 33 in the direction of the pointer 40 is appropriately adjusted according to the shape of the dial direction reflecting portion 32.

  The dial direction emitting portion 34 is disposed substantially parallel to the surface of the inner wall light incident portion 111 a provided on the inner wall of the pointer shaft insertion hole 111 of the light guide dial 10, and the dial direction reflecting portion 32 is reflected. The first light La is emitted toward the inner wall light incident part 111a. The thickness of the dial direction emitting portion 34, which is the height direction of the light guide 30, is substantially the same as the thickness of the inner wall light incident portion 111a. With such a configuration, light leakage during transmission of light from the light guide 30 to the light guide dial 10 can be suppressed, and the design can be efficiently illuminated.

The pointer shaft insertion portion 35 is a portion through which a later-described pointer shaft 71 is inserted, and is provided as a through hole in the center O of the light guide 30. With such a configuration, the dial direction emitting part 34 can be provided in almost all directions, and light from the light source can be emitted in almost all directions of the light guide dial 10 around the pointer shaft insertion part 35. It is possible to illuminate a wider range of designs efficiently.
Note that the pointer shaft insertion portion 35 is not centered on the center O of the light guide 30, and may be provided at a position offset from the center O of the light guide 30.

  As shown in FIG. 5, the pointer 40 includes an instruction portion 41, a pointer base portion 42, and a pointer cap 43. The instructing unit 41 instructs an indicator design unit 121a, which will be described later, of the light guide dial plate 10 and receives the fourth light Le from the first light source 61 to shine. The pointer base 42 is fixed to a pointer shaft 71 provided in the drive movement 70. The pointer base portion 42 is integrally formed with the instruction portion 41 with a transparent resin. The pointer cap 43 is made of a light shielding synthetic resin and is provided so as to cover the pointer base 42.

  The circuit board 50 includes a light source 60 and a movement 70 and includes a control unit that performs electrical control of the display device 1.

  The light source 60 is mounted on the circuit board 50 and is of a top view type that irradiates light in a direction perpendicular to the circuit board 50 (front direction). The light source 60 includes a first light source 61 that emits light to the light guide 30, a second light source 62 that is disposed in the outer display area E <b> 2 and that illuminates the first warning unit 103 from the back surface of the light guide dial 10, The third light source 63 is disposed in the display area E1 and illuminates the second warning unit 104 from the back surface of the light guide dial 10.

  The movement 70 is mounted on the circuit board 50 and includes a pointer shaft 71 on which the pointer 40 is mounted. The pointer shaft 71 is positioned at the approximate center of the pointer shaft insertion hole 111 of the light guide dial plate 10 and passes therethrough, and the pointer base 42 is attached to the tip portion thereof.

  The decorative member 80 is disposed on the front side of the light guide dial plate 10 and has a light shielding property to cover the first insertion portion 112 and the second insertion portion 113 of the light guide dial plate 10 as shown in FIGS. It is a ring-shaped member. When the first light La traveling in the light guide dial 10 leaks from the first insertion portion 112 and the second insertion portion 113, the decorative member 80 gives the leaked light to the viewer. This prevents the viewer from visually recognizing, and the merchantability of the illumination can thereby be improved.

  The above is the configuration of the display device 1 in the present embodiment. Next, the operation and specific configuration of the light guide dial plate 10 in the display device 1 will be described.

As shown in FIG. 5, the light guide dial 10 includes a translucent light guide 11, a design display 12 that displays an indicator 101 on the surface of the light guide 11, and the light guide 11 and the design. A first low-refractive-index part 13 formed between the display part 12, a ground part 14 formed on the back side of the inner display area E <b> 1 of the light guide part 11, a light guide part 11 and a ground part 14; The second low-refractive-index part 15 formed between and the light-shielding part 16 formed on the back surface side of the outer display area E2 of the light guide part 11.
Further, as shown in FIG. 2, the light guide dial plate 10 includes a non-translucent indicator portion 101 that does not emit the first light La emitted from the first light source 61, and the first light emitted from the first light source 61. A background portion 102 that shines when illuminated by the light La, and a first warning portion 103 that shines when illuminated by the second light Lb emitted from the second light source 62 disposed on the back surface of the light guide dial 10. The second warning unit 104 that is illuminated by the third light Lc emitted from the third light source 63 disposed on the back surface of the light guide dial plate 10 and the display window that makes the display of the display 90 visible. 105, thereby providing predetermined information to the viewer.

The light guide 11 is a flat plate member formed of a synthetic resin member (for example, a polycarbonate plate or the like) having transparent or translucent translucency (including translucent property).
The light guide 11 has a pointer shaft insertion hole 111 through which a pointer shaft 71 provided in the movement 70 is inserted and has a diameter smaller than the pointer cap 43 of the pointer 40, and an inner wall of the pointer shaft insertion hole 111. The first light La emitted from the first light source 61 is taken in from the inner wall light incident part (light incident part) 111a, and the first light La is transmitted radially around the inner wall light incident part 111a. .

  The design display unit 12 is a display layer that is provided on the surface of the light guide unit 11 and displays a predetermined first design (characters, pictures, figures, symbols, and the like). In the present embodiment, the design display unit 12 is a display layer. The indicator 40 is constituted by a non-translucent (light-shielding) light-shielding part 12a that constitutes an index part 101 indicating a scale, a number, etc., and a translucent part 12b that constitutes a background part 102.

  The light shielding portion 12a is formed on the surface of the light guide portion 11 by using a dark color light shielding ink such as black or the like by printing, painting, or the like. In the present embodiment, the light shielding portion 12a is assumed to be black. The indicator part 101 constituted by the light shielding part 12a is visually recognized by the viewer both when the first light source 61 is not lit and when it is lit. The indicator portion 101 may be constituted by a light transmitting portion. In this case, the light transmitting portion is colored in a color different from that of the ground portion 14 described later, and when the first light source 61 is not lit. It is made visible to the viewer at any time when it is lit.

The translucent part 12b is a part of the design display part 12 where the light shielding part 12a is not formed, and is a part that becomes the background part 102 excluding the index part 101 representing the first design. In addition, as the translucent part 12b, a colorless and transparent ink may be printed or painted.
As described above, the light transmitting part 12b is a part constituting the background part 102, and the first light source 61 traveling in the light guide dial 10 is emitted from the light transmitting part 12b and blocked by the light shielding part 12a. As a result, the entire inner display area E1 excluding the indicator portion 101 shines, and the indicator portion 101 is displayed to the viewer.

  The first low refractive index portion 13 is formed between the light guide portion 11 and the design display portion 12, and is provided so as to cover the entire surface of the inner display region E1 of the light guide portion 12. The first low-refractive-index part 13 has a transparent or semi-transparent translucency (including semi-translucency) and is printed using a synthetic resin having a lower refractive index of light than the light guide part 11. Formed by painting or the like.

  The ground portion 14 is provided on the entire back surface side of the inner display region E1 of the light guide portion 11 by printing, painting, or the like using a material having light diffusibility, and the first light La guided by the light guide portion 11 is provided. Is diffused and emitted from the background portion 102 of the inner display area E1. The ground portion 14 is a color different from that of the light shielding portion 12 a constituting the indicator portion 101, and a light color material such as white or gray is used, and the background portion 102 represents a background of a color different from that of the indicator portion 101. That is, the viewer visually recognizes the ground portion 14 as the color of the background portion 102. In the present embodiment, the ground portion 14 is white. Further, the ground portion 14 is formed with a hole portion 14 a constituting the second warning portion 104 at a location facing the third light source 63. The ground portion 14 is formed with a hole (not shown) that constitutes the display window 105 at a location facing the display 90.

  The second low refractive index portion 15 is formed between the light guide portion 11 and the ground portion 14, and is provided by a light adjustment portion 15 a and a light adjustment portion 15 a provided in the vicinity of the pointer shaft insertion hole 111 of the light guide portion 11. And a pattern portion (second design portion) 15b which is provided outside and represents a pattern (second design) which will be described later. The second low-refractive index portion 15 has a transparent or semi-transparent translucency (including semi-translucency) and is printed using a synthetic resin having a lower refractive index of light than the light guide portion 11. Formed by painting or the like.

  Here, the first light La guided into the light guide unit 11 is an interface between the first low refractive index unit 13 and the light guide unit 11 or the second low refractive index unit 15 and the light guide unit. Total reflection occurs at the interface with 11. In total reflection, when light enters a small medium (first and second low refractive index sections 13 and 15) from a medium having a large refractive index (light guide section 11), the light to be incident is an interface. Is a phenomenon in which all (including almost all of them) are reflected. Total reflection is based on a predetermined angle (critical angle) in which the incident angle of light is determined by the respective refractive indexes of adjacent media (here, the light guide unit 11 and the first and second low refractive index units 13 and 15). Also happens when the big. Most of the light incident from the side surface of the light guide unit 11 reaches the first low refractive index unit 13 or the second low refractive index unit 15 at an incident angle larger than the critical angle. 11 and the first and second low refractive index portions 13 and 15 are totally reflected.

As shown in the enlarged sectional view of FIG. 7, the light adjusting unit 15 a is formed by forming a synthetic resin having a light refractive index lower than that of the light guide unit 11 in a fine dot pattern. The light adjustment unit 15 a changes the light emission efficiency together with the portion in contact with the light guide unit 11 where the light adjustment unit 15 a is not formed in the ground portion 14.
Specifically, the first light La traveling in the light guide unit 11 is totally reflected when it reaches the light adjusting unit 15a, and further travels in the light guide unit 11 toward the outer peripheral side. When it reaches, it is diffused and emitted from the background portion 102 to illuminate the background portion 102. The amount of light reflected inside the light guide portion 11 and the amount of light emitted outside the light guide portion 11 are adjusted according to the area ratio in which the light adjustment portion 15a and the ground portion 14 are formed. The emission efficiency can be changed. When the area ratio of the light adjusting portion 15a that is a low refractive index member is increased, the amount of light reflected inside the light guide portion 11 is increased, and when the area ratio of the ground portion 14 that is a diffusion member is increased, the light guide portion 11 is increased. The amount of light emitted outside increases. By forming the light adjusting portion 15a in the vicinity of the inner wall light incident portion 111a where the light from the first light source 61 enters, the light emission amount is suppressed in the vicinity of the inner wall light incident portion 111a of the background portion 102 and guided. The light traveling to the outer peripheral side of the light part 11 can be increased, and the background part 102 on the outer peripheral side can be well illuminated.

  As shown in FIG. 5, the pattern portion 15b is made of synthetic resin having a light refractive index lower than that of the light guide portion 11 on the outer peripheral side of the light guide portion 11 than the light adjustment portion 15a than the dots of the light adjustment portion 15a. The shape is partially formed in such a size that the viewer can confirm the shape, and represents a predetermined second design (pattern, symbol or picture). The 2nd design by pattern part 15b is a design visually recognized by a viewer only when the 1st light source 61 lights up so that it may explain in full detail behind. The second design only needs to be a design different from that of the index portion 101. In the present embodiment, as shown in FIG. 8B, the second design includes a dot-shaped pattern portion and a picture portion representing a butterfly. The dot-shaped pattern portion of the pattern portion 15b gradually decreases in density toward the direction farther from the inner wall light incident portion 111a that is the light incident portion (the outer peripheral side of the light guide portion 11) (in the present embodiment, the density is low). The dots made of the refractive index member are formed so as to become gradually smaller.

  The light shielding portion 16 is formed on the back surface of the outer display area E2 of the light guide portion 11 by using dark shaded light-shielding ink such as black or the like by printing, painting, or the like. Further, the light shielding part 16 is formed with a hole 16 a constituting the first warning part 103 at a location facing the second light source 62. A dark translucent portion may be provided in the hole 16a or so as to cover the hole 16a from the back surface side.

Next, the visual recognition state of the inner display area E1 when the first light source 61 is not turned on or turned on will be described with reference to FIG. 8A shows the light guide dial plate 10 when the first light source 61 is not lit, and FIG. 8B shows the light guide dial plate 10 when the first light source 61 is lit. Show.
First, when the first light source 61 is not lit, the first light La does not enter the light guide unit 11 and the background unit 102 is not illuminated. At this time, as shown in FIG. 7A, the viewer can visually recognize only the index portion 101 having a color different from that of the background portion 102 (the ground portion 14).
On the other hand, when the first light source 61 is turned on, the first light La enters the light guide unit 11, travels through the light guide unit 11, diffuses at the ground portion 14, and the background unit 102 is illuminated Is done. At this time, in the background portion 102, the light adjusting portion 15a and the pattern portion 15b, which are low refractive index members, are formed to reflect the first light La, and the light adjusting portion 15a and the pattern portion 15b are not formed. A luminance difference is generated between the portion 14 where the first light La is diffused by the portion 14. That is, the brightness of the portion where the light adjusting portion 15a and the pattern portion 15b are formed is lower (darker) than the portion where the first light La is diffused by the ground portion 14a. As a result, the viewer can visually recognize the pattern portion 15b in addition to the indicator portion 101, as shown in FIG. Note that the viewer also visually recognizes the light adjustment unit 15a, but the light adjustment unit 15a can also be recognized as part of the design in order to watch the pattern portion 15b more closely.

  The first warning part 103 is provided in the outer display area E2, and is configured by a hole 16a that transmits the second light Lb emitted from the second light source 62 located on the back surface of the light guide dial 10. In addition, since the second light Lb emitted from the second light source 62 is directly emitted without being diffused, reflected, or the like, it can be displayed with high brightness and can be noticed by the viewer.

  The second warning unit 104 is provided in the inner display area E1 and transmits the third light Lc emitted from the third light source 63 located on the back surface of the light guide dial plate 10, similarly to the first warning unit 103. Since the third light Lc emitted from the third light source 63 is directly emitted without being diffused or reflected, it can be displayed with high luminance and attracts the viewer's eyes. be able to.

The light guide dial plate 10 of the present embodiment has an inner wall light incident portion 111a that takes light from the first light source 61 therein, and a planar guide that guides the first light La taken from the inner wall light incident portion 111a. Optical part 11;
A design display unit 12 which is formed on the surface side of the light guide unit 11 and has an index unit 101 (light shielding unit 12a) representing the first design;
A first low refractive index portion 13 formed between the light guide portion 11 and the design display portion 12 and having a light refractive index lower than that of the light guide portion 11;
A ground portion 14 formed on the back surface side of the light guide portion 11, diffusing light guided by the light guide portion 11, and representing a background of a color different from the first design;
A light adjusting portion 15a that is formed between the light guide portion 11 and the ground portion 14 and changes the light emission efficiency together with the ground portion 11, and a pattern portion 15b that represents a second design different from the first design. And a second low-refractive index portion 15 having the same.
The second design includes at least one of a pattern, a symbol, and a picture.

  According to this, in addition to the 1st design by indicator part 101 visually recognized at the time of non-lighting, the 2nd design by pattern part 15b can be made to be visually recognized with lighting of the 1st light source 61, As the light source is turned on, a novel expression becomes possible. In addition, by gazing at the pattern portion 15b, even when the light adjustment efficiency is changed by the light adjustment portion 15a in the configuration in which the background portion 102 is illuminated, uneven illumination by the light adjustment portion 15a is made inconspicuous. be able to.

Moreover, the pattern part 15b is formed so that the density becomes low toward the direction far from the inner wall light incident part 111a side.
According to this, even when the pattern portion 15b is formed, the first light La can be satisfactorily illuminated up to the end portion of the background portion 102 on the side opposite to the incident side, and luminance unevenness at the end portion can be reduced. Can be reduced.

  The display device 1 according to the present embodiment includes a light guide dial plate 10, a first light source 61 that emits light, a pointer 40 that indicates an indicator portion 101 (light shielding portion 12 a) included in the light guide dial plate 10, The circuit board 50 which has a control part which controls the light source 61 and the pointer | guide 40 40, and the case body 20 which is provided between the circuit board 50 and the light guide dial plate 10, and supports the light guide dial plate 10 are provided.

  According to this, in addition to the indicator part 101 visually recognized when the first light source 61 is not turned on, the pattern part 15b can be made visible to the viewer as the first light source 61 is turned on. And novel expression is possible. In addition, by gazing at the pattern portion 15b, even when the light adjustment efficiency is changed by the light adjustment portion 15a in the configuration in which the background portion 102 is illuminated, uneven illumination by the light adjustment portion 15a is made inconspicuous. be able to.

The present invention is not limited to the above-described embodiments, and it is needless to say that the constituent members can be appropriately changed (including some deletions) without departing from the gist of the invention.
In the present embodiment, the light guide dial plate 10 divides the inner display area E1 and the outer display area E2 by the first insertion part 112 and the second insertion part 113, but along the inner display area E1. (In the shape of an arc), the light guide dial 10 is curved so as to protrude to the front side by drawing or the like, and a protrusion is provided, and the inner display area E1 and the outer display area E2 are partitioned by this protrusion. May be. In this case, the decorative member 80 is unnecessary. Further, in the present embodiment, the light guide dial plate 10 is configured to take the light from the first light source 61 into the light guide unit 11 from the inner wall light input unit 111a provided at the center. You may provide in the outer side wall part of the optical part 11. FIG.

  Moreover, in this embodiment, although the pattern part 15b represents the dot-shaped pattern part and the picture part showing the butterfly as a 2nd design, a 2nd design is not limited to this. For example, a pattern portion (second design portion) 15c representing a circular stripe pattern as shown in FIG. 9 may be provided as the second design. Moreover, you may provide the pattern part (2nd design part) 15d showing a lattice pattern as shown in FIG. 10 as a 2nd design. Moreover, you may provide the picture part (2nd design part) 15e containing a musical note symbol as shown in FIG. 11 as a 2nd design. The second design part of the present invention may also serve as a part of the light adjustment part, and the second design part is included in the light adjustment part (the light adjustment part and the second design part). May be mixed).

  The present invention relates to a display member that guides light emitted from a light source by a light guide unit to illuminate a design display unit and the like, and a display device including the display member.

DESCRIPTION OF SYMBOLS 1 Display apparatus 10 Light guide dial 11 Light guide part 12 Design display part 12a Light-shielding part 12b Light transmission part 13 1st low refractive index part 14 Ground part 15 2nd low refractive index part 15a Light adjustment part 15b Pattern part 20 Case body 30 Light guide 40 Pointer 50 Circuit board 60 Light source 70 Movement 71 Pointer shaft 80 Decoration member 90 Display unit 101 Scale unit 102 Background portion 103 First warning portion 104 Second warning portion 105 Display window 111 Pointer shaft insertion hole 111a Inner wall Light receiving part

Claims (4)

A light-guiding unit that takes light from the light source inside, and a planar light guide unit that guides light taken from the light-receiving unit;
A design display part formed on the surface side of the light guide part and having a first design part representing the first design;
A first low refractive index portion formed between the light guide portion and the design display portion and having a light refractive index lower than that of the light guide portion;
A ground part formed on the back side of the light guide part, diffusing the light guided by the light guide part, and representing a background of a color different from the first design;
A light adjusting portion that is formed between the light guide portion and the ground portion, and changes a light emission efficiency together with the ground portion, and a second design portion that represents a second design different from the first design; And a second low-refractive index part having a display member.   The display member according to claim 1, wherein the second design includes at least one of a pattern, a symbol, and a picture.   3. The display member according to claim 1, wherein the second design portion is formed so that a density thereof decreases in a direction away from the light incident portion side.   A display member according to any one of claims 1 to 3, a light source that emits light, a pointer that indicates the first design portion of the display member, and a control unit that controls the light source and the pointer. A display device comprising: a circuit board having a structure; and a case body that is provided between the circuit board and the display member and supports the display member.

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