Display device and electronic musical instrument

Abstract

Provided are a display device and an electronic musical instrument with display production. A display device includes: a plurality of light sources arranged side by side in a first direction; and a light guide member having an incident surface on which the light from the plurality of light sources enters and an exit surface on which the light from the incident surface exits, the light guide member being provided with openings at positions along a second direction intersecting the first direction, respectively, corresponding to the plurality of light sources.

Description

Technical Field

[0001] The invention relates to a display device and an electronic musical instrument. Background Art

[0002] In the past, a display device is known, which includes a light-guiding component that guides light from a light source incident on an incident surface and emits it from an emission surface on the opposite side of the incident surface. For example, Japanese Patent Gazette No. 2007-127909 discloses an LED display as a display device, which includes a plurality of LEDs (Light Emitting Diodes) as a plurality of light sources and a light-guiding component that guides light from the plurality of LEDs. In the LED display, a light-receiving surface (incident surface) is provided on the end surface of the light-guiding component opposite to each LED, and a display surface (emission surface) parallel to the light-receiving surface is provided on the end surface of the light-guiding component on the opposite side to the light-receiving surface. Summary of the invention

[0003] Problems to be solved by the invention

[0004] In a display device such as that disclosed in the above publication, light from a light source may diffuse, making it difficult to perform a desired display.

[0005] An advantage of the present invention is to provide a display device capable of performing good display and an electronic musical instrument including such a display device.

[0006] Means used to solve problems

[0007] A display device according to one technical solution of the present invention comprises: a plurality of light sources arranged in parallel in a first direction; and a light-guiding component having an incident surface for incident light from the plurality of light sources and an exit surface for emitting light from the incident surface, wherein openings are respectively provided at positions along a second direction intersecting the first direction corresponding to the plurality of light sources.

[0008] A display device according to another technical solution of the present invention comprises: a light source; a light guide plate having an incident surface for incident light from the light source and an exit surface for emitting light from the incident surface; and a supporting component made of the same material as the light guide plate and having a supporting portion for supporting the light guide plate; the supporting component is provided with an opening at a position connected to the supporting portion.

[0009] The electronic musical instrument of the present invention comprises the above-mentioned display device for displaying information well.

[0010] Effects of the Invention

[0011] According to the present invention, it is possible to provide a display device capable of performing good display and an electronic musical instrument including such a display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an overall perspective view of the electronic keyboard instrument according to the embodiment as viewed from the front side.

[0013] Figure 2 It is a perspective view of the main body of the electronic keyboard instrument according to the embodiment as seen from the front side, and is a perspective view of a state in which the left side panel is removed.

[0014] Figure 3 It is an exploded perspective view of the display component, the insulating sheet, and the metal plate component according to the embodiment.

[0015] Figure 4 This is a perspective view of the light guide member of the display member according to the embodiment as viewed from the front side.

[0016] Figure 5 It is a rear view of the light guide member of the display member according to the embodiment.

[0017] Figure 6 It is a front view of a light guide member, an LED substrate, an insulating sheet, and a metal plate member of a display member according to an embodiment.

[0018] Figure 7 is a longitudinal sectional view of a light guide component, an LED substrate, an insulating sheet, and a metal plate component of a display component according to an embodiment of the present invention. Figure 6 Cross-sectional view of section VII-VII.

[0019] Figure 8 is a cross-sectional view of a light guide component, an LED substrate, an insulating sheet, and a metal plate component of a display component according to an embodiment of the present invention. Figure 6 Cross-sectional view of section VIII-VIII. DETAILED DESCRIPTION

[0020] Embodiments of the present invention will be described with reference to the drawings. Figure 1 The electronic keyboard instrument (electronic musical instrument) 1 shown in the figure includes a main body 10 and a leg 100. Figure 1 As shown in FIG. 1 , the main body 10 includes: a keyboard 20 having a plurality of keys (operating elements) 22 consisting of white keys 22W and black keys 22B, and arranged in a manner such that the key portions of the keys 22 are exposed; and a main body housing (shell) 30 that surrounds and holds the keyboard 20. The leg 100 includes a pair of side plate members 110, a pedal frame 120, and a pedal device 130. In addition, the arrangement direction of the plurality of keys 22 of the keyboard 20 is set to the left-right direction (set Figure 1 The left side of the key 22 is the left side), and the extending direction of each key 22 is set to the front-back direction (set Figure 1 The front side of the electronic keyboard instrument is the front side), and the up-down direction of the electronic keyboard instrument 1 is the up-down direction (the Figure 1 The description is made with the upper side of the body being the upper side.

[0021] like Figure 1 As shown, a pair of side plate members 110 are plate-shaped members erected on the installation surface on the left and right sides of the electronic keyboard instrument 1 with both plate surfaces facing the left and right directions, and support the main body shell 30. The pedal frame 120 connects the side plate members 110 at the lower side of each side plate member 110. The pedal device 130 is provided at the substantially central part of the pedal frame 120 in the left and right direction. In the electronic keyboard instrument 1, the main body shell 30 of the main body 10 exposed to the outside and the side plate members 110 of the leg 100 are made of wood, and have a characteristic texture.

[0022] like Figure 1 and Figure 2 As shown, when viewed from the upper and lower sides, the main housing 30 is in a horizontally long rectangular shape with the left-right direction as the longitudinal direction, and has thick plate-like components such as a front panel 32, a rear panel 33, a left side baffle 34, a right side baffle 35, a front side top plate 36F, a rear side top plate 36B and a bottom panel 37, and the longitudinal section viewed from the left is generally L-shaped. Figure 2 3 shows the main body case 30 in a state where the left side guard 34 is removed. The front panel 32 is a substantially rectangular shape that is long in the left-right direction, and constitutes the lower part of the front end of the main body 10 and constitutes the front surface of the main body case 30 on the lower side of the keyboard 20. A power button 32a is provided at the right end of the front panel 32 as an on / off switch of the electronic keyboard instrument 1. The rear panel 33 is a substantially rectangular shape that is long in the left-right direction, and is provided at the rear of the main body 10, and constitutes the rear surface of the main body case 30.

[0023] The left side baffle 34 and the right side baffle 35 are both roughly rectangular in shape and long in the front-to-back direction, and are provided with a step difference roughly in the center of the front-to-back direction so that the front side is roughly the same height as the keyboard 20. The left side baffle 34 and the right side baffle 35 are respectively arranged on the left side and the right side of the main body 10, and constitute the left side surface and the right side surface of the main body shell 30. The front side top plate 36F is roughly rectangular in shape and long in the left-to-right direction, and is arranged on the front side of the upper rear side portion of the main body 10, and constitutes a part of the upper surface of the main body shell 30. The rear side top plate 36B is roughly rectangular in shape and long in the left-to-right direction, and is arranged on the rear side of the upper rear side portion of the main body 10, and constitutes a part of the upper surface of the main body shell 30. In addition, as Figure 1 and Figure 3 As shown, a volume panel 24 is provided between the keyboard 20 and the right side panel 35, and the volume panel 24 is provided with a volume button 24a for adjusting the output sound from the speaker, etc. In addition, a setting panel 26 is provided between the keyboard 20 and the left side panel 34, and various setting buttons 26a, etc. are provided.

[0024] The rear side top plate 36B is rotatably mounted relative to the rear panel 33 in a manner that the front side is open. On the lower side of the rear side top plate 36B, a cover plate 11 having a substantially rectangular plate shape that is long in the left-right direction is provided in a posture that the two plate surfaces are facing the up-down direction. On the cover plate 11, a plurality of substantially rectangular upper openings 11a that are open upward are provided at intervals in the left-right direction. The upper surface and side surfaces of the cover plate 11 are covered with a saran net. When the rear side top plate 36B is opened, the opening on the lower side of the rear side top plate 36B is covered by the cover plate 11, and the interior of the main body shell 30 is not visible. In addition, a music stand 36F1 is installed in the substantially central portion in the left-right direction of the front side top plate 36F. The bottom panel 37 is substantially rectangular in shape that is long in the left-right direction, is provided below the main body 10, and constitutes the lower surface of the main body shell 30.

[0025] like Figure 2 As shown, a substantially rectangular plate-shaped control (console) member 12 which is long in the left-right direction is provided on the rear side of each key 22 of the keyboard 20 with both plate surfaces facing the vertical direction. The control member 12 is provided in a position overlapping with the front end of the front side top plate 36F in the vertical direction so as to cover the rear end of each key 22 of the keyboard 20. The control member 12 is provided with various switches on the front surface, and the control member 12 makes it impossible to see the inside of the main body housing 30 from the outside of the electronic keyboard instrument 1 through the gap at the rear end of the keyboard 20. In the space provided between the keyboard 20 and the bottom plate 37, a key mechanism 39 is provided for achieving a key feel and tone close to that of a real piano when the performer presses each key 22 of the keyboard 20.

[0026] like Figure 2 As shown, the main body 10 is provided with a key cover 38 that covers the portion of the keyboard 20 that is exposed to the outside. The key cover 38 can be bent into two sections via a hinge, and can be freely accommodated in the space on the rear side of the key mechanism 39 inside the main housing 30. A handle part 14 serving as the handle part of the key cover 38 is provided between the front end of the key cover 38 and the operating part 12. In the center portion of the handle part 14, there are provided two horizontally long and roughly rectangular sound emission holes 14a that are opened in a manner that penetrates the handle part 14. In addition, in the state where the key cover 38 is accommodated in the main housing 30 ( Figure 2 In the state shown in the figure, a speaker (not shown) is provided in the space S on the rear side of the key cover 38 to emit the sound achieved by the key mechanism 39.

[0027] A metal plate member 16 (see FIG. 1 ) extending in the left-right direction is attached to the lower surface of the front top plate 36F. Figure 2 and Figure 3). The metal plate member 16 is roughly stepped from the front lower side to the rear upper side. At the front end portion of the lower side of the roughly stepped metal plate member 16, a roughly rectangular thick plate-shaped display member (display device) 40 that is long in the left-right direction is installed in a posture in which the display surface faces the front. The display member 40 is arranged between the key cover 38 and the front side top plate 36F in a configuration in which gaps are left on its upper and lower sides and open to the front side. In the electronic keyboard instrument 1, the sound emitted from the speaker provided in the main body housing 30 is emitted to the outside of the main body housing 30 via at least one of the four sound emission paths, namely, a sound emission path passing through the gaps between the keys 22 of the keyboard 20, a sound emission path passing through each sound emission hole 14a, a sound emission path passing through the gaps open on the upper and lower sides of the display member 40, or a sound emission path passing through the upper opening 11a.

[0028] Next, the effects and structure of the display unit 40, which is the main part of the present invention, will be described in detail. Figure 2 As shown, a display unit 42 having a rectangular shape and long in the left-right direction is provided at the approximately center of the front surface 40a of the display unit 40, and displays information related to the performance of the electronic keyboard instrument 1. The information related to the performance mentioned here refers to, for example, displaying the metronome function or displaying the strength of the key 22 pressed by the performer. In the center of the display unit 42, a plurality of LEDs 72 (see FIG. 1 ) are provided to display the information from the plurality of LEDs 72 (see FIG. 1 ) described later. Figure 3 ) of the light display area 42a. A plurality of LEDs 72 are arranged in the left-right direction, and any LED 72 is turned on or off.

[0029] When the display unit 42 is displayed as a metronome function, first, several consecutive LEDs 72 among the plurality of LEDs 72 are lit like a block, and the other LEDs 72 are not lit. Here, corresponding to the set beat, the LEDs 72 at one end (for example, the left end) of the lit LEDs 72 in the left-right direction are turned off, and the LEDs 72 that are adjacent to the LEDs 72 at the other end (for example, the right end) in the left-right direction and have been turned off are lit, and the same number of LEDs 72 are always set to be lit simultaneously and continuously. Then, this lighting and turning off are repeated, and on the other end side, when the turned off LEDs 72 disappear, the other lit LEDs 72 are turned off, and the LEDs 72 that are adjacent to the LEDs 72 at one end and have been turned off are lit, and then this lighting and turning off are repeated. That is, a plurality of continuously lit LEDs 72 appear to repeatedly reciprocate in the left-right direction in the display area 42 a in accordance with the set beat, thereby realizing a metronome function.

[0030] like Figure 3 As shown, the display component 40 includes an acrylic panel 44, a diffusion sheet 46, a light shielding shell (light shielding component) 50, a light guide component 60 and an LED substrate (substrate) 70 in order from the front side. An insulating sheet 80 is arranged on the rear side of the LED substrate 70. The above-mentioned metal plate component 16 is arranged on the rear side of the insulating sheet 80. The acrylic panel 44 is a transparent panel component in a substantially rectangular plate shape that is long in the left-right direction, and is arranged in a posture with the display surface facing forward, constituting the front surface 40a of the display component 40. The diffusion sheet 46 is a horizontally long substantially rectangular sheet component of a shape and size corresponding to the display unit 42, and is made of, for example, PET (polyethylene terephthalate) and has light diffusion properties. The diffusion sheet 46 is attached to the portion of the front surface 50a of the light shielding shell 50 that corresponds to the display unit 42.

[0031] The light shielding shell 50 is a substantially rectangular plate-shaped member that is long in the left-right direction, and is made of, for example, black polystyrene, and has light shielding properties. The light shielding shell 50 is arranged with both plate surfaces facing the front-to-back direction. On the front surface 50a of the light shielding shell 50, an outer edge portion 50b located at the outer edge of the front surface 50a protrudes slightly forward than the front surface 50a, and a substantially concave recessed portion in the front surface 50a that is open to the front side is surrounded by the outer edge portion 50b. The acrylic panel 44 is embedded in the recessed portion 50b. Figure 3 As shown in the enlarged view E1 of FIG. 1 , a horizontally long substantially rectangular frame-shaped frame portion 52 along the shape of the display portion 42 is provided at a position corresponding to the display portion 42 in the front surface 50a of the light shielding shell 50. In addition, a horizontally long substantially rectangular emission opening 52a is provided at a position corresponding to the display area 42a inside the frame-shaped portion 52, through which a part of the light guide member 60 is inserted and light from the LED 72 is emitted.

[0032] The LED substrate 70 is a plate-like member having a shape corresponding to the display unit 42 and a horizontally long, generally rectangular shape and a size slightly larger than the display unit 42, and is arranged so that the two main surfaces including the front surface 70a face the front-back direction. Figure 3 As shown in the enlarged view E2, a plurality of LEDs (light sources) 72 are provided at approximately the center position in the vertical direction of the front surface 70a of the LED substrate 70. The plurality of LEDs 72 are arranged in parallel at equal intervals along the left-right direction (first direction), and the approximately rectangular light emitting surface (light emitting surface) faces the front side. In the present embodiment, 20 LEDs 72 are provided on the LED substrate 70. The insulating sheet 80 is a shape corresponding to the LED substrate 70, and is a horizontally long, approximately rectangular sheet component that is one size larger than the LED substrate 70 and has insulating properties. By sandwiching the insulating sheet 80 between the LED substrate 70 and the metal plate component 16, a short circuit between the LED substrate 70 and the metal plate component 16 is prevented.

[0033] Next, the structure of the light guide member 60 will be described in detail. Figure 4 and Figure 5 As shown, the light guide member 60 is made of polycarbonate or acrylic with excellent light transmittance, and has a first plate member (support member) 62 and a second plate member (light guide plate) 64. The first plate member 62 is a plate member of a horizontally long and substantially rectangular shape, and is arranged with both plate surfaces facing the front-back direction, and the left-right dimension of the first plate member 62 is substantially equal to the left-right dimension of the emission opening 52a. The first plate member 62 is arranged so that its plate surface overlaps the front surface 70a of the LED substrate 70 in a manner substantially parallel to the plate surface of the LED substrate 70.

[0034] The first plate-like member 62 includes: a plate-like portion 62a constituting a plate surface of the first plate-like member 62; a plurality of extension portions 62b slightly offset from the outer edge of the long side of the plate-like portion 62a to the rear side in a step-like manner and extending outward (upward or downward) in a substantially rectangular plate shape; and a support portion 62c integrally connected to the second plate-like member 64 and preventing the second plate-like member 64 from being deformed or separated (see Figure 6 ). The first plate-shaped member 62 functions as a supporting member for supporting the second plate-shaped member 64. The first plate-shaped member 62 and the second plate-shaped member 64 are integrally formed of the same material, so that they can be manufactured more easily than molding by aligning and combining different members.

[0035] In the plate-like portion 62a of the first plate-like member 62, when the first plate-like member 62 is overlapped with the front surface 70a of the LED substrate 70, a plurality of openings (hereinafter referred to as "LED openings 62a1") each opening in a substantially rectangular shape are provided in a manner penetrating in the front-back direction above and below the positions corresponding to the respective LEDs 72. The plurality of LED openings 62a1 are arranged in pairs of two LED openings 62a1, each sandwiching one LED 72 and correspondingly arranged along the up-down direction (the second direction).

[0036] Among the plurality of LED openings 62a1, the corners at both ends of the lower side of the upper LED opening 62a1 located near the LED 72 and the corners at both ends of the upper side of the lower LED opening 62a1 are opened at approximately 90 degrees. In contrast, the corners at both ends of the upper side of the upper LED opening 62a1 and the corners at both ends of the lower side of the lower LED opening 62a1 located farther from the LED 72 are opened in a curved manner with a roundness. Therefore, strictly speaking, the linear length of the lower side of the upper LED opening 62a1 is slightly greater than the linear length of the upper side of the upper LED opening 62a1, and the linear length of the upper side of the lower LED opening 62a1 is slightly greater than the linear length of the lower side of the lower LED opening 62a1.

[0037] Each LED opening 62a1 is opened to a size larger than the light emitting surface of each LED 72. That is, the opening size D1 of each LED opening 62a1 in the left-right direction (see Figure 6 ) is, for example, 6 mm, which is larger than the dimensions of the light emitting surface of each LED 72 in the vertical direction and the horizontal direction. The interval D2 between the adjacent LED openings 62a1 in the horizontal direction (refer to Figure 6 Each extension 62b of the first plate-shaped member 62 is provided with a screw hole 62b1 for screwing the light guide member 60 to the front end portion 16a of the metal plate member 16 with the LED substrate 70 and the insulating sheet 80 sandwiched therebetween.

[0038] In addition, in the first plate-shaped member 62, support portions 62c are provided at positions corresponding to the interval D2 where the LED opening portion 62a1 is not provided in the left-right direction. The first plate-shaped member 62 is a member that supports the second plate-shaped member 64 that protrudes forward. Since the second plate-shaped member 64 has a characteristic of easily emitting light to a member that contacts, the first plate-shaped member 62 is supported at the support portion 62c in a manner that the second plate-shaped member 64 contacts with members other than the first plate-shaped member 62 as little as possible.

[0039] The second plate-like member 64 is a thick plate-like member in a horizontally long and roughly rectangular shape. It is arranged in a posture with both plate surfaces facing the vertical direction, that is, in a state of standing upright relative to the plate-like portion 62a of the first plate-like member 62, and its vertical dimensions and horizontal dimensions are slightly smaller than the vertical dimensions and horizontal dimensions of the emission opening 52a. In a state where the first plate-like member 62 overlaps with the front surface 70a of the LED substrate 70, the second plate-like member 64 is arranged in a manner in which the plate surface is substantially perpendicular to the plate surface of the LED substrate 70. The second plate-like member 64 includes: a light guide portion 64a, which constitutes the plate surface of the second plate-like member 64 and is located in front of the light guide portion 642; and a light receiving portion 64b, which is arranged at a position behind the light guide portion 64a and faces the light emission surface of the LED 72, and receives the light from the LED 72. The upper and lower sides of the light receiving portion 64b of each LED opening portion 62a1 are open in the front-to-back direction.

[0040] The front end face (top face) of the light guide portion 64a of the second plate-like member 64 is an emission face 64a1 from which the light from the LED 72 is emitted. On the other hand, the rear end face of the light receiving portion 64b is an incident face 64b1 for the light from the LED 72 to be incident. In the second plate-like member 64, the incident face 64b1 and the emission face 64a1 constitute opposite sides. The incident face 64b1 is coplanar with the rear surface (back face) of the plate-like portion 62a of the first plate-like member 62. In this way, the first plate-like member 62 and the second plate-like member 64 are arranged in such a manner that the incident face 64b1 extends in the left-right direction between the upper and lower pair of LED openings 62a1.

[0041] The emission surface 64a1 is a rough surface that is rougher than the incident surface 64b1. Specifically, the emission surface 64a1 is embossed with fine concavoconvex surfaces. Figure 7 ) is a smooth surface smoother than the incident surface 64b1. Specifically, the upper surface 64c and the lower surface 64d are glossy surfaces having glossiness by being subjected to gloss processing. Therefore, the emission surface 64a1 is easier to emit the light propagating in the light guide portion 64a to the outside of the light guide portion 64a than the upper surface 64c and the lower surface 64d, and the upper surface 64c and the lower surface 64d are more difficult to emit the light propagating in the light guide portion 64a to the outside of the light guide portion 64a than the emission surface 64a1 because they reflect the light propagating in the light guide portion 64a. In addition, the axial direction (front-to-back direction) of the imaginary line connecting the emission surface 64a1 of the second plate-shaped member 64 and the incident surface 64b1 intersects the up-down direction (the second direction) in a perpendicular manner.

[0042] In addition, a wall portion (not shown) extending in a square tube shape from the opening end of the emission opening 52a toward the rear side is provided on the rear side of the light shielding shell 50. The inner side surface of the wall portion is substantially the same shape as the outer shape of the light guide portion 64a, and the wall portion is one size larger than the light guide portion 64a. When the light guide member 60 is assembled to the light shielding shell 50, the light guide portion 64a is accommodated inside the wall portion in the form of the emission surface 64a1 being exposed from the emission opening 52a, and most of the outer peripheral surface (upper surface 64c, lower surface 64d, right side surface, left side surface) of the second plate-shaped member 64 other than the emission surface 64a1 and the incident surface 64b1 is covered by the light shielding shell 50 and shielded from light. Therefore, when the light from each LED 72 is incident on the incident surface 64b1 and emitted from the emission surface 64a1, when the electronic keyboard instrument 1 is observed from the front side, it is visually seen as if only the display area 42a emits light.

[0043] Here, the arrangement of the LEDs 72 and the light guide member 60 in the display member 40 will be described. Figure 6 As shown, when the light guide member 60 is mounted on the metal plate member 16 together with the LED substrate 70 and the insulating sheet 80, each LED 72 is hidden on the rear side of the second plate-shaped member 64 of the light guide member 60 when viewed from the front side. That is, the dimension of each LED 72 in the up-down direction is smaller than the dimension D3 of the second plate-shaped member 64 in the up-down direction. The dimension D3 of the second plate-shaped member 64 in the up-down direction is, for example, 2.5 mm. The interval between each LED 72 and the opening end on the left side of each LED opening portion 62a1 and the interval between each LED 72 and the opening end on the right side of each LED opening portion 62a1, i.e., the interval D4, are, for example, both 2.6 mm. In addition, the interval between each LED 72 and the opening end on the upper side of each LED opening portion 62a1 and the interval between each LED 72 and the opening end on the lower side of each LED opening portion 62a1, i.e., the interval D5, are, for example, both 2 mm.

[0044] In addition, each extension portion 62b of the first plate-shaped member 62 is offset toward the rear side in a step-like manner at an interval greater than the thickness of each LED 72. Therefore, when the light guide member 60 is mounted on the metal plate member 16, the plate-shaped portion 62a is slightly separated from the LED substrate 70, and the light emitting surface of each LED 72 is close to the incident surface 64b1 of the second plate-shaped member 64 (see FIG. Figure 7 ) The distance D6 between the light emitting surface of each LED 72 and the incident surface 64b1 is, for example, 0.5 mm.

[0045] Next, the optical path of light emitted from each LED 72 provided on the LED substrate 70 will be described. Figure 7 and Figure 8As shown, most of the light emitted from each LED 72 is incident on the incident surface 64b1 of the light guide member 60. A portion of the light incident on the incident surface 64b1 moves forward substantially straightly as it is, and reaches the emission surface 64a1 of the light guide member 60 (hereinafter, each light path that moves straightly from the incident surface 64b1 to the emission surface 64a1 is collectively referred to as the "first light path L1") (refer to Figure 7 and Figure 8 The light reaching the emission surface 64a1 is diffusely reflected by the emission surface 64a1 due to the embossing process performed on the emission surface 64a1, and is efficiently emitted from the emission surface 64a1. The light emitted from the emission surface 64a1 is diffused by the diffusion sheet 46 and emitted from the emission opening 52a to the front side with approximately uniform brightness, and the performer can visually see it in the display area 42a of the electronic keyboard instrument 1.

[0046] In addition, if Figure 7 As shown, another part of the light incident on the incident surface 64b1 diffuses from the incident surface 64b1 to both sides in the upward and downward directions in the light guide portion 64a, and reaches the upper surface 64c and the lower surface 64d of the second plate-shaped member 64. The light reaching the upper surface 64c and the lower surface 64d is totally reflected inward by the upper surface 64c and the lower surface 64d due to the gloss processing performed on the upper surface 64c and the lower surface 64d, and reaches the emission surface 64a1 of the light guide member 60 (hereinafter, each light path that is totally reflected by the upper surface 64c and the lower surface 64d and reaches the emission surface 64a1 is collectively referred to as the "second light path L2") (refer to Figure 7 denoted by arrows).

[0047] Here, the upper surface 64c and the lower surface 64d of the second plate-like member 64 around each LED 72 are opened in the LED opening 62a1, so they are surrounded by an air layer with a refractive index lower than that of the light-guiding member 60. Since the first plate-like member 62 and the second plate-like member 64 are integrally formed with the same material, there is no interface at the connection part, so they have the characteristic of easily transmitting light to each other. Therefore, it is possible that a part of the light in the second plate-like member 64 is not emitted from the emission surface 64a1 but is transmitted to the first plate-like member 62b. However, since the LED opening 62a1 is provided in the first plate-like member 62, it becomes a structure in which if the light incident from the incident surface 64b1 of the second plate-like member 64 reaches the upper surface 64c and the lower surface 64d of the second plate-like member 64, it is easy to be reflected at the interface with the air layer.

[0048] In other words, in the structure in which the LED opening 62a1 of the present invention is not provided around each LED 72, since the light incident from the incident surface 62b1 into the second plate-shaped member 64 is propagated and diffused in the vertical direction toward the first plate-shaped member 62, the brightness per unit area in the vertical direction becomes darker than that of the light guide member 60 of the present invention. In contrast, according to the light guide member 60 of the present invention, bright light with good efficiency in the vertical direction and appropriate contrast with the surroundings can be emitted.

[0049] In addition, if Figure 8 As shown, another part of the light incident on the incident surface 64b1 diffuses from the incident surface 64b1 to both sides in the left and right directions in the light guide portion 64a and reaches the emission surface 64a1 of the light guide member 60 (hereinafter, each light path diffused to both sides and reaching the emission surface 64a1 is collectively referred to as the "third light path L3") (refer to Figure 8 In addition, the intervals between the LEDs 72 are such that the light reaching the emission surface 64a1 via the third optical path L3 reaches the entire area of ​​the emission surface 64a1 except for the portion located in front of the LEDs 72 (the portion reached via the first optical path L1).

[0050] Since the light emitted from each LED 72 reaches the emission surface 64a1 via one of the first light path L1, the second light path L2, and the third light path L3 as described above, the emission surface 64a1 is not only brightly illuminated in a dot shape in the portion located in front of each LED 72, but also emitted from the emission surface 64a1 corresponding to the mutually adjacent LED 72. As a result, the area in the left and right directions of the emission surface 64a1 corresponding to the number of LEDs 72 lit at the same time is uniformly illuminated with approximately equal brightness. Therefore, in the above-mentioned metronome function, it does not seem that each LED 72 emits light separately, but it seems that a light block extending in the left and right directions moves and emits light in the left and right directions, so that the beat can be visually recognized well. In addition, when lighting up with the desired brightness, compared with the case where only one LED 72 is lit, by lighting up some or all of the multiple LEDs 72 at the same time, the load on each LED 72 can be reduced.

[0051] As described above, the display component 40 of the present embodiment comprises: an LED substrate 70, provided with a plurality of LEDs 72 arranged in parallel in the left-right direction; and a light-guiding component 60, having a first plate-like component 62 and a second plate-like component 64, the first plate-like component 62 including a plurality of LED opening portions 62a1 opened along the left-right direction in a manner corresponding to the plurality of LEDs 72 on a plate surface substantially parallel to the LED substrate 70, the second plate-like component 64 including an incident surface 64b1 provided on an end surface on the front side of a plate surface substantially perpendicular to the LED substrate 70, and an emission surface 64a1 provided on an end surface on the rear side forming an opposite side to the incident surface 64b1; the light-guiding component 60 guides light from at least one of the plurality of LEDs 72 incident on the incident surface 64b1 and emits it from the emission surface 64a1; the first plate-like component 62 and the second plate-like component 64 are connected so that the incident surface 64b1 is located within the LED opening portion 62a1 along the left-right direction.

[0052] According to the display component 40 of the present embodiment having the above-described structure, most of the light emitted from each LED 72 is incident on the light guide component 60 from the incident surface 64b1. Since the LED openings 62a1 are respectively provided in the upper and lower directions of the incident surface 64b1, the light that reaches the opening end of the LED opening 62a1 among the light incident on the light guide component 60 is reflected at the interface between the light guide component 60 and the opening end of the LED opening 62a1 and remains in the light guide component 60, so that the amount of light emitted by diffusing in the upper and lower directions toward the LED opening 62a1 can be suppressed as much as possible, and can be efficiently emitted from the incident surface 64b1.

[0053] In addition, since the first plate-shaped member 62 is provided with the support portion 62c formed integrally with the second plate-shaped member 64 at each position in the vertical direction where the LED 72 is not arranged, it is possible to prevent the second plate-shaped member 64 from falling off from the first plate-shaped member 62. Since the support portion 62c is separated from the light emitting surface of the LED 72 as compared with the opening end of the LED opening portion 62a1 located in the vertical direction of the adjacent LED 72, the amount of light that enters the second plate-shaped member 64 from the incident surface 64b1 of the light receiving portion 64b and enters the second plate-shaped member 64, which reaches the support portion 62c and diffuses in the vertical direction via the support portion 62c, is small.

[0054] In addition, the light diffused in the left-right direction in the second plate-shaped member 64 can be emitted from the emission surface 64a1 between the adjacent LEDs 72 by adjusting the interval between the LEDs 72, so that even a relatively small number of LEDs 72 can output light that has expanded in the left-right direction. In this way, in the present embodiment, the shape of the light guide member 60 is characterized, so that the light emitted from each LED 72 can be efficiently incident on the second plate-shaped member 64, and can reach the emission surface 64a1 in a wide range in the left-right direction. Therefore, the number of LEDs 72 provided on the LED substrate 70 can be reduced, and the brightness can be improved while suppressing the uneven brightness.

[0055] Furthermore, according to the display component 40 of the present embodiment, the two plate surfaces (upper surface 64c and lower surface 64d) of the second plate-shaped component 64 are smooth surfaces that are smoother than the incident surface 64b1. Specifically, the incident surface 64b1, which is a smooth surface, is a surface that has been gloss-processed. According to this structure, by gloss-processing the upper surface 64c and the lower surface 64d, the light that diffuses in the second plate-shaped component 64 to both sides in the upward and downward directions and reaches the upper surface 64c and the lower surface 64d is easily totally reflected and reaches the emission surface 64a1. Therefore, the light diffused in the second plate-shaped component 64 can effectively reach the emission surface 64a1, and further improvement of brightness can be achieved.

[0056] Furthermore, according to the display member 40 of the present embodiment, the emission surface 64a1 of the second plate-shaped member 64 is a rough surface that is rougher than the incident surface 64b1. Specifically, the emission surface 64a1, which is a rough surface, is a surface that is embossed. According to this structure, by the embossing process performed on the emission surface 64a1, the light that is guided in the second plate-shaped member 64 and reaches the emission surface 64a1 is diffusely reflected by the emission surface 64a1, and the emission surface 64a1 can be made uniformly bright. Therefore, it is possible to effectively suppress uneven brightness on the emission surface 64a1.

[0057] Furthermore, according to the display member 40 of this embodiment, as a plurality of light sources, a plurality of LEDs 72 are provided at equal intervals in the left-right direction on the LED substrate 70, and the incident surface 64b1 in the second plate-shaped member 64 also extends in the left-right direction. Thus, a specific structure for making most of the light emitted from each LED 72 enter the incident surface 64b1 can be realized.

[0058] The electronic keyboard instrument 1 of this embodiment is provided with a display unit 40 for displaying information related to a performance in a good manner. According to this structure, as a device for displaying, for example, a metronome function or displaying the strength of a key 22 pressed by a performer in the electronic keyboard instrument 1, the display unit 40 of this embodiment in which brightness unevenness is suppressed and brightness is improved can be used. Therefore, the light displayed on the emission surface 64a1 can be illuminated with a small width in the vertical direction, and can be illuminated in the left and right direction in a manner that is not visually perceived as a dot but visually perceived as continuous light in the left and right directions, and an electronic keyboard instrument 1 having a display unit 40 with excellent visibility and creative design can be realized.

[0059] Furthermore, the electronic keyboard instrument 1 of the present embodiment includes a metal plate member 16 for attaching the display member 40 to the main body case 30 of the electronic keyboard instrument 1, and an insulating sheet 80 interposed between the LED substrate 70 and the metal plate member 16. Thus, a specific structure can be realized in which the display member 40 can be firmly attached to the electronic keyboard instrument 1 by the metal plate member 16 and a short circuit between the metal plate member 16 and the LED substrate 70 can be prevented.

[0060] In addition, the embodiments described above are provided as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other forms, and various omissions, substitutions, changes, and combinations can be made without departing from the main purpose of the invention. These embodiments and their modifications are included in the scope and main purpose of the invention, and are included in the invention described in the claims and their equivalents. For example, in the above-mentioned embodiment, an LED is used as a light source, but it is not limited to this, and other light sources such as organic EL elements may be used instead. In addition, in the above-mentioned embodiment, an example in which the first plate-like component and the second plate-like component are both plate-like is shown, but at least one of them may not be plate-like.

[0061] In addition, in the above-mentioned embodiment, a structure in which the first plate-like member and the second plate-like member are formed integrally is illustrated, but instead, a structure in which the first plate-like member and the second plate-like member are separated and combined in a manner of being connected at the support portion may be used. In this case, it is preferred that no gap occurs at the position where the first plate-like member and the second plate-like member are connected. In addition, in the above-mentioned embodiment, a structure in which the LED opening portion opens in a roughly rectangular shape in the front-to-back direction is illustrated, but it is not limited to this, and it may also be a polygonal shape other than a rectangle, a roughly semicircular shape with the LED side as the diameter, or a roughly semi-elliptical shape. In addition, in the above-mentioned embodiment, a structure in which a pair of LED opening portions are arranged in an opposing manner for one LED is illustrated, but it is not limited to this, and only one of the pair of LED opening portions may be arranged for one LED.

Claims

1. A display device, characterized in that: have: A plurality of light sources are arranged in parallel in a first direction; and The light-guiding component has an incident surface for incident light from at least one of the above-mentioned multiple light sources and an exit surface for emitting light from the above-mentioned incident surface, and openings are respectively provided at positions along a second direction intersecting the above-mentioned first direction corresponding to the positions of the above-mentioned multiple light sources.

2. The display device according to claim 1, wherein: The light guide component has: a first plate-shaped member having the opening; and The second plate-shaped member is provided with the incident surface at one end and the emitting surface at the other end, and is connected to the first plate-shaped member.

3. The display device according to claim 2, wherein: The first plate-shaped member supports the second plate-shaped member between the openings.

4. The display device according to claim 2, wherein: Both plate surfaces of the second plate-shaped member are smoother surfaces than the incident surface.

5. The display device according to claim 2, wherein: The emission surface of the second plate-shaped member is a rough surface that is rougher than the incidence surface.

6. The display device according to claim 1, wherein: Two of the openings are provided for each of the plurality of light sources.

7. The display device according to claim 6, wherein: The second direction intersects with the direction of a line connecting the incident surface and the emitting surface; The two openings are arranged to sandwich each of the plurality of light sources.

8. The display device according to claim 2, wherein: The second plate-shaped member is also provided with the emission surface between the plurality of light sources.

9. The display device according to claim 1, wherein: The light emitting surfaces of the plurality of light sources are respectively substantially rectangular in shape, and the opening is opened in a substantially rectangular shape with a size larger than the light emitting surfaces of the plurality of light sources.

10. A display device, characterized in that: have: light source; a light guide plate having an incident surface for incident light from the light source and an exit surface for emitting light from the incident surface; and A supporting member, which is made of the same material as the light guide plate and has a supporting portion for supporting the light guide plate; The support member is provided with an opening at a position connected to the support portion.

11. An electronic musical instrument, characterized in that: have: The display device according to any one of claims 1 to 10; and At least 1 operating element.

12. The electronic musical instrument according to claim 11, wherein: The display device displays information related to the performance.

13. The electronic musical instrument according to claim 11, wherein: have: a metal plate component for mounting the display device on the housing of the electronic musical instrument; and The insulating sheet is sandwiched between the display device and the metal plate member.

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