Display device and recording device

Abstract

To improve uniformity of light distribution while miniaturizing a light guide member.SOLUTION: A display device includes first and second light-emitting elements and a light guide member. The light guide member has first and second ends spaced apart in a first direction. A first light-receiving portion of the light guide member is located closer to the first end than the second end in the first direction, and a second light-receiving portion is located closer to the second end than the first end in the first direction. An optical axis of the light received by the first light-receiving portion reaches a light-emitting portion closer to the second end than the first end, and an optical axis of the light received by the second light-receiving portion reaches the light-emitting portion closer to the first end than the second end.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present invention relates to a display device and a recording device. [Background technology]

[0002] There is known a display device that includes a light emitting element serving as a light source and a light guide member, and that emits light from a part of the light guide member as a light output section. With regard to such a display device, a configuration has been proposed that improves the light diffusion efficiency in the light guide member in order to uniformize the light distribution and reduce the number of light sources relative to the light distribution range (for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5034984 [Patent Document 2] Patent Publication No. 2021-27018 Summary of the Invention [Problem to be solved by the invention]

[0004] In order to achieve uniform light distribution, it is advantageous to increase the distance from the light receiving section to the light emitting section of the light guide member and obtain diffused light over a wide range. However, increasing the distance from the light receiving section to the light emitting section increases the size of the light guide member, which is disadvantageous in terms of miniaturizing the device.

[0005] The present invention provides a technique for improving the uniformity of light distribution while reducing the size of a light-guiding member. [Means for solving the problem]

[0006] According to the present invention, A first light emitting element; A second light-emitting element; a first light receiving section that receives light from the first light emitting element, a second light receiving section that receives light from the second light emitting element, and a light emitting section that extends in a first direction and emits light received by the first light receiving section and the second light receiving section, the light guiding member having a first end and a second end spaced apart in the first direction, the first light receiving portion and the second light receiving portion are spaced apart from the light output portion in a second direction intersecting the first direction, the first light receiving portion is located closer to the first end portion than to the second end portion in the first direction; the second light receiving portion is located closer to the second end portion than to the first end portion in the first direction, an optical axis of the light received by the first light receiving portion reaches the light output portion on a side closer to the second end portion than the first end portion; an optical axis of the light received by the second light receiving portion reaches the light output portion at a position closer to the first end portion than the second end portion; A display device is provided. Effect of the Invention

[0007] According to the present invention, a technique is provided that improves the uniformity of light distribution while reducing the size of a light guide member. [Brief description of the drawings]

[0008] [Figure 1] 1 is an external view of a recording apparatus according to an embodiment of the present invention. [Diagram 2] FIG. [Diagram 3] FIG. 2 is a schematic diagram of the internal mechanism of the recording device in FIG. 1. [Figure 4] 1A is a front view of a display device according to an embodiment of the present invention, FIG. 1B is a rear view of a light-guiding member, and FIG. 1C is a perspective view of the display device at an end portion of the light-guiding member. [Diagram 5] Cross-sectional view taken along line AA in Figure 2. [Figure 6] FIG. [Figure 7] FIG. 4 is a diagram showing a configuration of a reflecting section. [Figure 8] 5A and 5B are diagrams showing a propagation state of light within a light-guiding member. [Figure 9] 5A and 5B are diagrams showing a propagation state of light within a light-guiding member. [Figure 10] 4A to 4C are diagrams showing a propagation mode of light within a light-guiding member. [Figure 11] FIG. [Figure 12] 4A to 4C are diagrams illustrating differences in height of protrusions. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, the embodiments will be described in detail with reference to the attached drawings. Note that the following embodiments do not limit the invention according to the claims. Although the embodiments describe a number of features, not all of these features are essential to the invention, and the features may be combined in any manner. Furthermore, in the attached drawings, the same reference numbers are used for the same or similar configurations, and duplicated descriptions are omitted.

[0010] <Recording device> FIG. 1 is an external view of a recording apparatus 1 according to an embodiment of the present invention, as viewed from the front. The recording apparatus 1 of this embodiment is an inkjet recording apparatus that ejects ink as a liquid to record on a recording medium, but the present invention is also applicable to various recording apparatuses other than inkjet recording apparatuses and electrical equipment other than recording apparatuses. In the figure, arrows X to Z indicate directions that intersect with each other, and particularly in the case of this embodiment, arrows X and Y indicate horizontal directions that are perpendicular to each other, and arrow Z indicates the up-down direction (direction of gravity). The X direction is the width direction (left-right direction) of the recording apparatus 1. The Y direction is the depth direction of the recording apparatus 1.

[0011] In addition, "recording" includes not only the formation of meaningful information such as characters and figures, but also the formation of images, patterns, and the like on a recording medium, whether meaningful or insignificant, or the processing of the medium, regardless of whether it is manifested in a way that can be visually perceived by humans. In addition, although a sheet of paper is assumed as the "recording medium" in this embodiment, it may also be cloth, plastic film, etc.

[0012] The recording device 1 has a rectangular parallelepiped shape overall, with a foldable paper feed tray 2A provided at the rear of its top surface, and two upper and lower paper feed cassettes 2B and 2C and a discharge port 3 provided at its front surface. The paper feed tray 2A and the paper feed cassettes 2B and 2C form a loading section on which recording media are loaded before recording. The paper feed cassettes 2B and 2C can be inserted and removed in the Y direction from the device body. The recording media after recording are discharged from the discharge port 3. The discharge port 3 is provided with a discharge tray on which the recording media is placed after recording.

[0013] The front part of the recording device 1 is provided with an operation unit 14 that can be operated by the user. FIG. 2 is a front view of the operation unit 14. The operation unit 14 is provided with a display unit 15 that displays information and a plurality of operation buttons 16. The operation buttons 16 include a power key that can instruct the power of the recording device 1 to be turned on / off. A light emitting unit 43 of a display device (display unit) 20, which will be described later, is disposed at the lower front part of the operation unit 14. The light emitting unit 43 is located above the discharge port 3 in the Z direction. Since the recorded recording medium is discharged from the discharge port 3, the user frequently visually checks the periphery of the discharge port 3. By disposing the light emitting unit 43 adjacent to the discharge port 3, it is possible to improve the visibility of the display of the light emitting unit 43 for the user, and also to attract the user's attention to the display of the light emitting unit 43.

[0014] 3 is an explanatory diagram showing the internal mechanism of the recording device 1. The recording medium P set in the paper feed tray 2A, paper feed cassette 2B or paper feed cassette 2C is conveyed by the conveying unit 4A, 4B or 4C and the conveying units 5 to 8, guided by the guide member 9. During the conveying process, an image is recorded by the recording head 11, and the recording medium is discharged to the discharge tray 3. The guide member 9 has a guide portion 9a that forms a path for turning the recording medium P over, and the recording device 1 is also capable of double-sided recording on the recording medium P.

[0015] Of the transport units 4A to 4C and the transport units 5 to 8, the transport units 4A to 4C are disposed on the most upstream side in the transport direction of the recording medium P. The transport unit 5 is disposed downstream of the transport units 4B and 4C, and the transport unit 6 is disposed downstream of the transport units 4A and 5. The transport unit 7 is disposed downstream of the transport unit 6, and the transport unit 8 is disposed downstream of the transport unit 7.

[0016] The transport unit 7 transports the recording medium P in the Y direction (sub-scanning direction) relative to the recording head 11. The recording position of the image in the Y direction relative to the recording medium P is controlled by driving and controlling the transport unit 7. The transport unit 7 includes a drive roller 7a and a driven roller 7b that is in pressure contact with the drive roller 7a, and transports the recording medium P by clamping it between these rollers.

[0017] The transport units 4A to 4C and the transport units 5 and 6 can also be called feeding units because they feed the recording medium P to the transport unit 7. The transport units 4A to 4C in this embodiment include a pickup roller that picks up the recording medium P from the corresponding paper feed tray 2A, stacking unit 20B or stacking unit 20C and transports it to the transport unit 5 or 6.

[0018] The transport units 5 and 6 include drive rollers 5a, 6a and driven rollers 5b, 6b that are in pressure contact with the corresponding drive rollers 5a, 6a, and these rollers sandwich and transport the recording medium P. The transport units 5 and 6 can also be called intermediate units or intermediate rollers because they are located between the most upstream transport units 4A to 4C and the transport unit 7.

[0019] The transport unit 8 can also be called a discharge unit because it discharges the recorded recording medium P to the discharge tray 3. The transport unit 8 includes a drive roller 8a and a driven roller 7b that is in pressure contact with the drive roller 8a, and these rollers sandwich and transport the recording medium P.

[0020] The recording head 11 is an inkjet recording head that ejects ink to record on a recording medium. The recording head 11 is positioned between the transport unit 7 and the transport unit 8 in the transport direction of the recording medium P. The recording head 11 is mounted on a carriage 12. The ink ejection surface (lower surface) of the recording head 11 faces the platen 10, and ejects ink onto the recording medium P transported over the platen 10. An ink tank that supplies ink to the recording head 11 is disposed inside the recording device 1, and the ink in the ink tank is supplied to the recording head 11 via a tube.

[0021] The carriage 12 is moved back and forth in a direction across the recording medium P (in this embodiment, the X direction (main scanning direction)) by a drive unit 13. The drive unit 13 is a belt transmission mechanism using a motor as a drive source, and includes, for example, a drive pulley and a driven pulley spaced apart in the X direction, an endless belt wound around these pulleys, and a guide member that guides the movement of the carriage 12 in the X direction. The carriage 12 is connected to the endless belt. When the drive pulley is rotated by the motor, the endless belt runs and the carriage 11 moves. The recording head 11 may be attached to the carriage 12 in a replaceable manner.

[0022] Thus, the recording device 1 of this embodiment is a serial type recording device in which the recording head 11 is mounted on the carriage 12. The recording operation on the recording medium P is performed by alternately repeating a transport operation (intermittent transport operation) in which the transport unit 7 transports the recording medium P a predetermined amount and a recording scan while transport of the transport unit 7 is stopped. The recording scan is an operation in which ink is ejected from the recording head 11 while the carriage 12 on which the recording head 11 is mounted is moved.

[0023] <Display device> FIG. 4(A) is a front view of the display device 20 disposed inside the operation unit 14. The display device 20 is an illumination device that includes light-emitting elements 31 and 32 as light sources and a light-guiding member 40 having a light output section 43, and guides light from the light-emitting elements 31 and 32 through the light-guiding member 40 and outputs the light from the light output section 43. By turning on and off the light output section 43, it is possible to provide the user with information regarding the state of the recording device 1, for example. FIG. 4(B) is a rear view of the light-guiding member 40, and FIG. 4(C) is a perspective view of an end of the light-guiding member 40. FIG. 5 is a cross-sectional view taken along the line AA in FIG. 2. FIG. 6 is a perspective view of the light-guiding member 40 as viewed from the rear side.

[0024] The light emitting elements 31 and 32 are, for example, LEDs, and are supported by the circuit board 14b. The light emitting elements 31 and 32 are arranged spaced apart in the X direction corresponding to light receiving units 41 and 42, which will be described later, and are arranged at the same positions in the Y and Z directions. A drive circuit for driving the light emitting elements 31 and 32 is mounted on the circuit board 14b. The light guiding member 40 is formed of, for example, a transparent resin such as highly transparent acrylic or polystyrene.

[0025] The operation unit 14 has case members 14a and 14c that form its outer walls. The case member 14a mainly constitutes the front surface of the operation unit 14, and the case member 14c mainly constitutes the back surface and bottom surface of the operation unit 14. The light emitting elements 31 and 32, the light guide member 40, and the circuit board 14b are housed inside the case members 14a and 14c. A gap is formed between the bottom end of the case member 14c and the tip of the bottom surface of the case member 14c, and the light output portion 43 of the light guide member 40 enters this gap and is configured to be visible from the outside.

[0026] The light guide member 40 includes a wall portion 401 and a wall portion 402. The wall portion 401 is a plate-like portion extending in the X direction and the Z direction, and has a front surface 44 and a rear surface 45. The wall portion 402 is a plate-like portion that protrudes from a lower end portion of the wall portion 401 to the front side in the Y direction and extends in the Y direction and the X direction. The thickness of the wall portion 402 in the Z direction gradually decreases from the front surface side to the rear surface side in the Y direction. The light guide member 40 is configured as an L-shaped member as a whole by the wall portion 401 and the wall portion 402. The light guide member 40 is a member that is longer in the X direction than in the Z direction as a whole, and is made smaller in size in the Z direction.

[0027] The light guide member 40 includes light receiving portions 41 and 42 and a light output portion 43. The light receiving portion 41 receives light from the light emitting element 31, and the light receiving portion 42 receives light from the light emitting element 32. The light receiving portions 41 and 42 are formed on the upper part of the wall portion 401 and on the rear portion, and are curved recesses in this embodiment. By making the light receiving portions 41 and 42 curved recesses, it is possible to improve the diffusion of light incident from the light emitting elements 31 and 32 within the light guide member 40. The light receiving portions 41 and 42 are formed to be spaced apart in the X direction, and are arranged at the same position in the Y direction and the Z direction.

[0028] The light exiting portion 43 exits the light received by the light receiving portions 41 and 42. The light exiting portion 43 is formed on the lower portion of the wall portion 402, and includes a light exiting surface 43a on the front side and a light exiting surface 43b on the bottom side. Note that it is also possible to employ a configuration in which the light exiting portion 43 only has the light exiting surface 43a and does not have the light exiting surface 43b (a configuration in which the light exiting portion 43 is covered by the case member 14c or the like).

[0029] The light guide member 40 has one end 431 in the X direction and the other end 432 on the opposite side. The light output portion 43 extends in the X direction, and in this embodiment, the end 431 is also one end of the light output portion 43 in the X direction, and the end 432 is also the other end of the light output portion 43 in the X direction. In this manner, in this embodiment, the end 431 and the end 432 are part of the light output portion 43, but the end 431 and the end 432 may not be part of the light output portion 43 and may be a portion that does not output light.

[0030] When viewed in the Z direction, the light receiving portions 41 and 42 are spaced apart from the light output portion 43. When viewed in the X direction, the light receiving portion 41 is located closer to the end portion 431 than the end portion 432, and the light receiving portion 42 is located closer to the end portion 432 than the end portion 431. When comparing the positions with the center line CL of the light guide member 40 in the X direction, the light receiving portion 41 is located closer to the end portion 431 than the center line CL, and the light receiving portion 42 is located closer to the end portion 432.

[0031] The light-guiding member 40 has a reflecting portion 46. The reflecting portion 46 reflects the light received by the light-receiving portions 41 and 42 to the light-emitting portion 43. The reflecting portion 46 is formed from the lower portion of the back surface 45 to the bottom surface of the wall portion 402. In the present embodiment, the reflecting portion 46 has a plurality of protrusions 460. The protrusions 460 make it easier for the light propagating within the light-guiding member 40 to be reflected to the light-emitting portion 43.

[0032] FIG. 7 shows the arrangement pattern of the protrusions 461, and is an enlarged view of part B in FIG. 4(B). In this embodiment, the protrusions 460 have a quadrangular pyramid shape having a vertex 461, and the width in the direction intersecting the X direction (Z direction in part B) is longer than the width in the X direction. In other words, the bottom surface of the protrusions 460 has a diamond shape with one diagonal line in the X direction and the diagonal line in the X direction being shorter than the other diagonal line. The multiple protrusions 461 are arranged in a staggered pattern. By arranging the multiple protrusions 461 in a staggered pattern, the gap between the adjacent protrusions 461 can be narrowed, and the number of protrusions 461 per unit area can be increased. The rows of the protrusions 461 in the direction intersecting the X direction may be arranged, for example, three or more rows per mm.

[0033] 8 and 9 show an example of light propagation within the light-guiding member 40. As an example, the propagation path of light taken in from the light-emitting element 31 through the light-receiving section 41 to the light-guiding member 40 is shown. The light is repeatedly reflected and refracted at interfaces formed by each surface within the light-guiding member 40. Among these, a portion of the light is reflected by the reflecting section 46 while maintaining its intensity by total reflection, and a portion of the light is emitted from the light-emitting section 43.

[0034] Here, the incident light from the light emitting element 31 is F, and the reflected light from the reflecting portion 46 is R. The light propagation paths shown in Figs. 8 and 9 are examples of paths in which the incident light F is totally reflected by the front surface 44 and the wall surface of the protrusion 46 of the reflecting portion 46, respectively, and is output from the light output portion 43. The reflection angle and refraction angle of the light reflected at the interface change depending on the refractive index determined by the materials inside and outside the interface, but among them, the light beam that is incident at or below the critical angle is totally reflected and maintains its intensity. Assuming that the outside of the interface is air and that the material of the light guide member 40 is polystyrene, the critical angle is approximately 39 degrees from the refractive indexes of these media.

[0035] <Uniformity of light distribution> A longer optical path length from the light-receiving sections 41 and 42 to the light-emitting section 43 is advantageous in terms of uniformity of orientation at the light-emitting section 43 because the diffused light is diffused over a wider area. However, a longer optical path length increases the size of the light-guiding member 40. The light-guiding member 40 of the present embodiment is long in the X direction and short in the Z direction, while the light-receiving sections 41 and 42 and the light-emitting section 43 are spaced apart in the Z direction, and the optical path length tends to be shorter when viewed in the Z direction.

[0036] Therefore, in this embodiment, the optical axis of the light from the light-emitting element 31 received by the light-receiving unit 41 is tilted in the X direction with respect to the Z direction so that the optical axis reaches the light-emitting unit 43 at a position closer to the end 432 than the end 431. Similarly, the optical axis of the light from the light-emitting element 32 received by the light-emitting unit 42 is tilted in the X direction with respect to the Z direction so that the optical axis reaches the light-emitting unit 43 at a position closer to the end 431 than the end 432. In other words, the light from the light-emitting element 31 is made incident toward the end 432 of the light-emitting unit 43 that is farther from the light-emitting element 31, and the light from the light-emitting element 32 is made incident toward the end 431 of the light-emitting unit 43 that is farther from the light-emitting element 32.

[0037] This allows the optical path length of the light propagating from the light receiving sections 41 and 42 to the light exiting section 43 to be longer while shortening the Z-direction dimension of the light-guiding member 40, thereby increasing the diffusion rate of the light and improving the uniformity of the orientation in the light exiting section 43.

[0038] 10(A) to 10(C) are explanatory diagrams of the optical axes of the light-emitting elements 31 and 32 incident on the light-receiving units 41 and 42. The optical axis 31A of the light of the light-emitting element 31 incident on the light-receiving unit 41 is reflected at a position RP1 on the reflecting unit 46 at an incident angle θ1 and exits from the light-exiting unit 43 at a position X1 in the X direction. The optical axis 32A of the light of the light-emitting element 32 incident on the light-receiving unit 42 is reflected at a position RP2 on the reflecting unit 46 at an incident angle θ2 and exits from the light-exiting unit 43 at a position X2 in the X direction. Both of the incident angles θ1 and θ2 are within an angle range smaller than the critical angle.

[0039] In the present embodiment, the optical axis 31A and the optical axis 32A intersect within the wall portion 401 before reaching the reflecting portion 46. By designing the intersection point closer to the light receiving portions 41 and 42, the length of the light guide member 40 in the Z direction can be made shorter. In addition, the position X1 is closer to the end 432 of the light output portion 43 than the center line CL, and the position X2 is closer to the end 431 of the light output portion 43 than the center line CL. The light of each of the light emitting elements 31 and 32 can be made to reach a farther distance. The position RP1 is designed to be closer to the end 432 than the end 431, more specifically, to be closer to the end 432 than the center line CL. Similarly, the position RP2 is designed to be closer to the end 431 than the end 432, more specifically, to be closer to the end 431 than the center line CL. By designing the reflection points of the light of each of the light emitting elements 31 and 32 farther away, the light can be diffused to a farther range of the light output portion 43.

[0040] When the light from the light emitting elements 31 and 32 incident on the light receiving sections 41 and 42 reaches the light output section 43 without being reflected in the light guide member 40, a portion with high brightness is generated in the light output section 43, which causes uneven brightness. Therefore, openings 47 and 48 are formed in the light guide member 40 as shown in Figs. 4(A) to 4(C) and 6. The opening 47 is formed in the wall section 401 at a portion between the light receiving section 41 and the light output section 43 in the Z direction. The opening 48 is formed in the wall section 401 at a portion between the light receiving section 42 and the light output section 43 in the Z direction. In the case of this embodiment, the openings 47 and 48 are cutouts with a part of them opened. However, the openings 47 and 48 may be holes with closed peripheries.

[0041] 11 is an explanatory diagram of the function of opening 47. Light, indicated by an arrow, traveling directly from light-emitting element 31 to light output section 43 is reflected and refracted at the interface of opening 46 when passing through opening 47. Therefore, it is possible to suppress the generation of light rays traveling directly from light-emitting element 31 to light output section 43. Opening 48 has a similar function.

[0042] Next, by varying the heights of the protrusions 460 (the distance from the bottom surface to the apex 461), the luminance distribution of the light output section 43 can be made more uniform. Specifically, in the X direction, the height of the protrusions 460 arranged in the center (near the center line CL) is made higher than that of the protrusions 460 arranged at the ends of the reflecting section 46. This promotes light to be reflected toward the ends of the light output section 43 rather than toward the center. As an example, the difference in height between the protrusions 460 in the center and the protrusions 460 at the ends is set to a value within a range of several tens of μm to 100 μm, and the height is gradually changed.

[0043] The following formula shows an example of setting the heights of the protrusions 460 whose positions differ in the X direction. The height of the n-th protrusion 460 is Hn, the coordinates on the X axis are as shown in FIG. 12, the position of the light receiving portion 41 is L1, and the position of the light receiving portion 42 is L2. Hn=0.000006tn 3 -0.0004tn 2 +0.0093tn+0.112 tn=xn-L1 (n <CN) tn=L2-Xn (n≧CN) CN is the median value of the number of protrusions 460 in one row in the X direction. For example, if the number of protrusions 460 in one row in the X direction is 151, then CN=76.

[0044] <Summary of the embodiment> The above-described embodiments disclose at least the display device and the recording device according to the following items.

[0045] Item 1. A first light emitting element; A second light-emitting element; a first light receiving section that receives light from the first light emitting element, a second light receiving section that receives light from the second light emitting element, and a light emitting section that extends in a first direction and emits light received by the first light receiving section and the second light receiving section, the light guiding member having a first end and a second end spaced apart in the first direction, the first light receiving portion and the second light receiving portion are spaced apart from the light output portion in a second direction intersecting the first direction, the first light receiving portion is located closer to the first end portion than to the second end portion in the first direction; the second light receiving portion is located closer to the second end portion than to the first end portion in the first direction, an optical axis of the light received by the first light receiving portion reaches the light output portion on a side closer to the second end portion than the first end portion; an optical axis of the light received by the second light receiving portion reaches the light output portion at a position closer to the first end portion than the second end portion; A display device comprising:

[0046] Item 2. The display device according to item 1, an optical axis of the light received by the first light receiving unit intersects with an optical axis of the light received by the second light receiving unit; A display device comprising:

[0047] Item 3. The display device according to item 1 or 2, the light guide member includes a reflecting portion that reflects the light received by the first light receiving portion and the light received by the second light receiving portion to the light exiting portion, an optical axis of the light received by the first light receiving portion reaches the reflecting portion, and then is reflected toward the second end portion in the first direction and reaches the light exiting portion; an optical axis of the light received by the second light receiving portion reaches the reflecting portion, and then is reflected toward the first end portion in the first direction and reaches the light exiting portion; A display device comprising:

[0048] Item 4. The display device according to item 3, an optical axis of the light received by the first light receiving portion reaches the reflecting portion on a side closer to the second end than to the first end in the first direction; an optical axis of the light received by the second light receiving portion reaches the reflecting portion on a side closer to the first end portion than the second end portion in the first direction; A display device comprising:

[0049] Item 5. The display device according to item 3 or 4, an optical axis of the light received by the first light receiving unit and an optical axis of the light received by the second light receiving unit intersect with each other before reaching the reflecting unit; A display device comprising:

[0050] Item 6. The display device according to any one of items 3 to 5, The reflecting portion has a plurality of protrusions. A display device comprising:

[0051] Item 7. Item 6. The display device according to item 6, The plurality of protrusions are a plurality of quadrangular pyramid-shaped protrusions arranged in a staggered pattern. A display device comprising:

[0052] Item 8. The display device according to item 6 or 7, Among the plurality of protrusions, a protrusion disposed in a central portion is taller than a protrusion disposed at an end portion in the first direction. A display device comprising:

[0053] Item 9. The display device according to any one of items 1 to 8, The light guiding member is a first opening portion is provided between the first light receiving portion and the first end portion of the light emitting portion in the second direction; a second opening portion is provided between the second light receiving portion and the second end portion of the light emitting portion in the second direction; A display device comprising:

[0054] Item 10. The display device according to any one of claims 1 to 9, The light guide member is a member that is longer in the first direction than in the second direction. A display device comprising:

[0055] Item 11. Item 11. The display device according to item 10, The light guiding member is a first wall portion extending in the first direction and the second direction; a second wall portion protruding from an end portion in the second direction of the first wall portion in a third direction intersecting the first direction and the second direction and extending in the first direction, the first light receiving portion and the second light receiving portion are formed on the first wall portion, The light exit portion is formed on the second wall portion. A display device comprising:

[0056] Item 12. A recording device equipped with a display unit, The display unit is A first light emitting element; A second light-emitting element; a first light receiving portion that receives light from the first light emitting element, a second light receiving portion that receives light from the second light emitting element, and a light emitting portion that extends in a first direction and emits light received by the first light receiving portion and the second light receiving portion, and a light guiding member having a first end and a second end spaced apart in the first direction; the first light receiving portion and the second light receiving portion are spaced apart from the light output portion in a second direction intersecting the first direction, the first light receiving portion is located closer to the first end portion than to the second end portion in the first direction; the second light receiving portion is located closer to the second end portion than to the first end portion in the first direction, an optical axis of the light received by the first light receiving portion reaches the light output portion on a side closer to the second end portion than the first end portion; an optical axis of the light received by the second light receiving portion reaches the light output portion at a position closer to the first end portion than the second end portion; A recording apparatus comprising:

[0057] Item 13. Item 13. The recording device according to item 12, a discharge port that opens to a front portion of the recording device and through which the recording medium is discharged after recording; The display unit is located above the outlet on the front surface. A recording apparatus comprising:

[0058] Item 14. Item 14. The recording device according to item 12 or 13, an operation unit disposed on a front surface of the recording device and operable by a user; The display unit is provided on the operation unit. A recording apparatus comprising:

[0059] Item 15. Item 15. The recording device according to item 14, The light output unit is disposed at a lower front surface of the operation unit. A recording apparatus comprising:

[0060] Item 16. 16. The recording device according to any one of claims 12 to 15, an optical axis of the light received by the first light receiving unit intersects with an optical axis of the light received by the second light receiving unit; A recording apparatus comprising:

[0061] Item 17. 17. The recording device according to any one of claims 12 to 16, the light guide member includes a reflecting portion that reflects the light received by the first light receiving portion and the light received by the second light receiving portion to the light exiting portion, an optical axis of the light received by the first light receiving portion reaches the reflecting portion, and then is reflected toward the second end portion in the first direction and reaches the light exiting portion; an optical axis of the light received by the second light receiving portion reaches the reflecting portion, and then is reflected toward the first end portion in the first direction and reaches the light exiting portion; A recording apparatus comprising:

[0062] Item 18. Item 18. The recording device according to item 17, an optical axis of the light received by the first light receiving portion reaches the reflecting portion on a side closer to the second end than to the first end in the first direction; an optical axis of the light received by the second light receiving portion reaches the reflecting portion on a side closer to the first end portion than the second end portion in the first direction; A recording apparatus comprising:

[0063] Item 19. Item 17 or 18. The recording device according to item 17 or 18, an optical axis of the light received by the first light receiving unit and an optical axis of the light received by the second light receiving unit intersect with each other before reaching the reflecting unit; A recording apparatus comprising:

[0064] Item 20. 20. A recording device according to any one of claims 17 to 19, The reflecting portion has a plurality of protrusions. A recording apparatus comprising:

[0065] The invention is not limited to the above-described embodiments, and various modifications and variations are possible without departing from the spirit and scope of the invention. Accordingly, the following claims are appended to apprise the public of the scope of the invention. [Explanation of symbols]

[0066] 1 recording device, 20 display device, 31 light emitting element, 32 light emitting element, 40 light guide member, 41 light receiving portion, 42 light receiving portion, 43 light emitting portion

Claims

1. A first light emitting element; A second light-emitting element; a first light receiving section that receives light from the first light emitting element, a second light receiving section that receives light from the second light emitting element, and a light emitting section that extends in a first direction and emits light received by the first light receiving section and the second light receiving section, the light guiding member having a first end and a second end spaced apart in the first direction, the first light receiving portion and the second light receiving portion are spaced apart from the light output portion in a second direction intersecting the first direction, the first light receiving portion is located closer to the first end portion than to the second end portion in the first direction; the second light receiving portion is located closer to the second end portion than to the first end portion in the first direction, an optical axis of the light received by the first light receiving portion reaches the light output portion on a side closer to the second end portion than the first end portion; an optical axis of the light received by the second light receiving portion reaches the light output portion at a position closer to the first end portion than the second end portion; A display device comprising:

2. The display device according to claim 1 , an optical axis of the light received by the first light receiving unit intersects with an optical axis of the light received by the second light receiving unit; A display device comprising:

3. The display device according to claim 1 , the light guide member includes a reflecting portion that reflects the light received by the first light receiving portion and the light received by the second light receiving portion to the light exiting portion, an optical axis of the light received by the first light receiving portion reaches the reflecting portion, and then is reflected toward the second end portion in the first direction and reaches the light exiting portion; an optical axis of the light received by the second light receiving portion reaches the reflecting portion, and then is reflected toward the first end portion in the first direction and reaches the light exiting portion; A display device comprising:

4. The display device according to claim 3 , an optical axis of the light received by the first light receiving portion reaches the reflecting portion on a side closer to the second end than to the first end in the first direction; an optical axis of the light received by the second light receiving portion reaches the reflecting portion on a side closer to the first end portion than the second end portion in the first direction; A display device comprising:

5. The display device according to claim 3 , an optical axis of the light received by the first light receiving unit and an optical axis of the light received by the second light receiving unit intersect with each other before reaching the reflecting unit; A display device comprising:

6. The display device according to claim 3 , The reflecting portion has a plurality of protrusions. A display device comprising:

7. The display device according to claim 6, The plurality of protrusions are a plurality of quadrangular pyramid-shaped protrusions arranged in a staggered pattern. A display device comprising:

8. The display device according to claim 6, Among the plurality of protrusions, a protrusion disposed in a central portion is taller than a protrusion disposed at an end portion in the first direction. A display device comprising:

9. The display device according to claim 1 , The light guiding member is a first opening portion is provided between the first light receiving portion and the first end portion of the light emitting portion in the second direction; a second opening portion is provided between the second light receiving portion and the second end portion of the light emitting portion in the second direction; A display device comprising:

10. The display device according to claim 1 , The light guide member is a member that is longer in the first direction than in the second direction. A display device comprising:

11. The display device according to claim 10, The light guiding member is a first wall portion extending in the first direction and the second direction; a second wall portion protruding from an end portion in the second direction of the first wall portion in a third direction intersecting the first direction and the second direction and extending in the first direction, the first light receiving portion and the second light receiving portion are formed on the first wall portion, The light exit portion is formed on the second wall portion. A display device comprising:

12. A recording device equipped with a display unit, The display unit is A first light emitting element; A second light-emitting element; a first light receiving portion that receives light from the first light emitting element, a second light receiving portion that receives light from the second light emitting element, and a light emitting portion that extends in a first direction and emits light received by the first light receiving portion and the second light receiving portion, and a light guiding member having a first end and a second end spaced apart in the first direction; the first light receiving portion and the second light receiving portion are spaced apart from the light output portion in a second direction intersecting the first direction, the first light receiving portion is located closer to the first end portion than to the second end portion in the first direction; the second light receiving portion is located closer to the second end portion than to the first end portion in the first direction, an optical axis of the light received by the first light receiving portion reaches the light output portion on a side closer to the second end portion than the first end portion; an optical axis of the light received by the second light receiving portion reaches the light output portion at a position closer to the first end portion than the second end portion; A recording apparatus comprising:

13. 13. The recording device according to claim 12, a discharge port that opens to a front portion of the recording device and through which the recording medium is discharged after recording; The display unit is located above the outlet on the front surface. A recording apparatus comprising:

14. 13. The recording device according to claim 12, an operation unit disposed on a front surface of the recording device and operable by a user; The display unit is provided on the operation unit. A recording apparatus comprising:

15. 15. The recording device according to claim 14, The light output unit is disposed at a lower front surface of the operation unit. A recording apparatus comprising:

16. 13. The recording device according to claim 12, an optical axis of the light received by the first light receiving unit intersects with an optical axis of the light received by the second light receiving unit; A recording apparatus comprising:

17. 13. The recording device according to claim 12, the light guide member includes a reflecting portion that reflects the light received by the first light receiving portion and the light received by the second light receiving portion to the light exiting portion, an optical axis of the light received by the first light receiving portion reaches the reflecting portion, and then is reflected toward the second end portion in the first direction and reaches the light exiting portion; an optical axis of the light received by the second light receiving portion reaches the reflecting portion, and then is reflected toward the first end portion in the first direction and reaches the light exiting portion; A recording apparatus comprising:

18. 18. The recording device according to claim 17, an optical axis of the light received by the first light receiving portion reaches the reflecting portion on a side closer to the second end than to the first end in the first direction; an optical axis of the light received by the second light receiving portion reaches the reflecting portion on a side closer to the first end portion than the second end portion in the first direction; A recording apparatus comprising:

19. 18. The recording device according to claim 17, an optical axis of the light received by the first light receiving unit and an optical axis of the light received by the second light receiving unit intersect with each other before reaching the reflecting unit; A recording apparatus comprising:

20. 18. The recording device according to claim 17, The reflecting portion has a plurality of protrusions. A recording apparatus comprising:

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