Display device and optical member

Abstract

To provide a display device and an optical member which can appropriately detect a quantity of light corresponding to incident light to a transmission reflection part by a sensor.SOLUTION: A display device has a display part, a sensor, an optical member 100 and a transmission reflection part. The sensor detects a light quantity. The optical member is arranged in the periphery of the transmission reflection part. The optical member has a plurality of mutually continuous reflection surface groups 102. The optical member receives light, is reflected on a plurality of reflection surface groups, and guides the reflected light to the sensor. The transmission reflection part is arranged in front of the display part. The plurality of reflection surface groups constitute a polygonal surface swollen to a side opposite to the incident side with respect to a virtual plane VP. The virtual plane is regulated by an outer contour of the plurality of reflection surface groups.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to a display device and an optical member. [Background technology]

[0002] In a display device having a display panel, a transflective unit disposed in front of the display panel, and a sensor, the sensor detects the amount of light corresponding to the light incident on the transflective unit in an operating mode in which the display panel is turned off. At this time, it is desirable for the sensor to appropriately detect the amount of light corresponding to the light incident on the transflective unit. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-183758 Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure provides a display device and an optical member that can appropriately detect the amount of light corresponding to the light incident on a transflective section using a sensor. [Means for solving the problem]

[0005] The display device according to the present disclosure has a display unit, a sensor, an optical element, and a transflective element. The sensor detects the amount of light. The optical element is arranged around the transflective element. The optical element has multiple reflective surfaces that are connected to each other. The optical element receives light, reflects it from the multiple reflective surfaces, and guides the reflected light to the sensor. The transflective element is arranged in front of the display unit. The multiple reflective surfaces form polygonal surfaces that bulge out on the side opposite the incident side with respect to an imaginary plane. The imaginary plane is defined by the outer contours of the multiple reflective surfaces. [Effects of the Invention]

[0006] According to the display device and optical member according to the present disclosure, the sensor can appropriately detect the amount of light corresponding to the light incident on the transmissive-reflective portion. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a diagram showing an outline of a vehicle on which a display system including a display device according to an embodiment is mounted. [Figure 2] 1 is a perspective view showing an external configuration of a display device according to an embodiment. [Figure 3] 1 is a front view showing the external configuration of a display device according to an embodiment; [Figure 4] 1 is a cross-sectional view showing a configuration of a display device according to an embodiment. [Figure 5] FIG. 2 is a perspective view showing a configuration of an optical member according to the embodiment. [Figure 6] FIG. 2 is a vertical cross-sectional view showing the configuration of an optical member according to the embodiment. [Figure 7] FIG. 2 is a cross-sectional view in a planar direction showing the configuration of an optical member according to the embodiment. [Figure 8] 5A and 5B are perspective views showing the operation of the optical member in the embodiment. [Figure 9] 5A and 5B are diagrams showing vertical angle dependence of sensor sensitivity in the embodiment. [Figure 10] 5A and 5B are perspective views showing the operation of the optical member in the embodiment. [Figure 11] 6A and 6B are graphs showing horizontal angle dependency of sensor sensitivity in the embodiment. [Figure 12] FIG. 10 is a perspective view showing the configuration of an optical member according to a modified example of the embodiment. [Figure 13] FIG. 10 is a vertical cross-sectional view showing the configuration of an optical member according to a modified example of the embodiment. [Figure 14] FIG. 10 is a cross-sectional view in a planar direction showing the configuration of an optical member according to a modified example of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of a display device according to the present disclosure will be described with reference to the drawings.

[0009] (Embodiment) The display device according to the embodiment has a display panel, a transmissive-reflective section arranged in front of the display panel, and a sensor. The sensor detects the amount of light corresponding to the light incident on the transmissive-reflective section, and the sensor is devised to appropriately detect the amount of light.

[0010] A display system 3 including a display device 1 according to the embodiment can be mounted on a vehicle 5, as shown in FIG. 1. For example, the display device 1 is an electronic mirror, and the display system 3 is an electronic mirror system. FIG. 1 is a diagram showing a vehicle 5 on which the display system 3 is mounted. The display system 3 includes the display device 1 and an imaging device 2.

[0011] The imaging device 2 is an on-board camera mounted on the vehicle 5, and is installed on the outside or inside of the vehicle body 6. The imaging device 2 may be installed at the rear end of the vehicle body 6 to image the rear, at the end of the vehicle body 6 near the door to image the side, or at the front end of the vehicle body 6 to image the front.

[0012] The display device 1 is disposed inside the vehicle interior 7. The display device 1 is, for example, an electronic mirror, has a surface 1a, and is capable of displaying an image captured by the imaging device 2 on the surface 1a. The display device 1 is configured to be switchable between a display mode and a mirror mode. The display mode is a mode in which the display panel of the display device 1 displays an image captured by the imaging device 2, and the display device 1 functions as a display. The mirror mode is a mode in which the display panel of the display device 1 is turned off, and the display device 1 functions as a mirror.

[0013] When the display device 1 is an electronic mirror for rearview visibility, it may be implemented in the form of a rearview mirror, with the surface 1a facing the vehicle interior 7 and the shape of the surface 1a being the mirror surface of a rearview mirror. When the display device 1 is an electronic mirror for side visibility, it may be implemented in the form of a door mirror (for example, door mirror 61), with the surface 1a facing the rear of the vehicle body 6 and the shape of the surface 2a being the mirror surface of a door mirror. When the display device 1 is an electronic mirror for forward visibility, it may be implemented in the form of an in-vehicle display device (for example, display device 71), with the surface 1a facing the vehicle interior 7 and the shape of the surface 2a being the display unit of the display device.

[0014] FIG. 1 illustrates a configuration in which the imaging device 2 is installed at the rear end 6a of a vehicle body 6, and the display device 1 is applied to an electronic mirror system for rearward visibility. The electronic mirror system for rearward visibility is also called an electronic rearview mirror. The imaging device 2 captures an image of the area behind the vehicle body. The display device 1 can display the image of the area behind the vehicle body captured by the imaging device 2.

[0015] When the display device 1 is an electronic mirror for rearview, it can be configured as shown in Figures 2 and 3. Figure 2 is a perspective view showing the external configuration of the display device 1. Figure 3 is a front view showing the external configuration of the display device 1.

[0016] The display device 1 has a back surface 1b on the opposite side to the front surface 1a, and may be fixed to the body of the vehicle 5 on the back surface 1b side via a fixing member 20. The display device 1 has a housing 10, a transmissive-reflective unit 11, a display panel 12, and an optical member 100.

[0017] The housing 10 has a substantially rectangular parallelepiped exterior shape. In the following description, the direction perpendicular to the surface 1a of the display device 1 is referred to as the X direction, the longitudinal direction of the housing 10 is referred to as the Y direction, and the direction perpendicular to the X and Y directions is referred to as the Z direction. The housing 10 has an opening 10a on the -X side, an opening 10b on the +X side, and an opening 10c on the -Z side.

[0018] One end of an arm 21 of the fixing member 20 is rotatably inserted into the opening 10b. The other end of the arm 21 is connected to an attachment member 22 of the fixing member 20. The attachment member 22 can be attached to the inside of the vehicle body 6. In this way, the housing 10 can be fixed to the vehicle body 6.

[0019] The transmission-reflection unit 11 is disposed on the -X side of the display panel 12 and is fixed to the housing 10 from the -X side. The transmission-reflection unit 11 extends in a plate-like shape in the YZ direction and has a substantially rectangular or substantially inverted isosceles trapezoidal shape in a YZ plane view. The transmission-reflection unit 11 may have rounded corners of its substantially rectangular or substantially inverted isosceles trapezoidal shape. The transmission-reflection unit 11 has YZ dimensions corresponding to the opening 10a. The Y width of the transmission-reflection unit 11 is slightly larger than the Y width of the opening 10a. The Z width of the transmission-reflection unit 11 is slightly larger than the Z width of the opening 10a. This allows the transmission-reflection unit 11 to block the opening 10a from the -X side.

[0020] The display panel 12 is disposed on the +X side of the transflective unit 11 and is housed within the housing 10. The display panel 12 extends like a plate in the YZ directions and has a substantially rectangular shape in a YZ plane view. The display panel 12 has YZ dimensions corresponding to the opening 10a. The Y width of the display panel 12 is slightly larger than the Y width of the opening 10a. The Z width of the display panel 12 is slightly larger than the Z width of the opening 10a. This allows the display panel 12 to block the opening 10a from the +X side.

[0021] The optical element 100 is disposed around the transmission-reflection unit 11. The optical element 100 may be disposed on the -Z side of the transmission-reflection unit 11. The optical element 100 has an incident surface 101 that protrudes from the opening 10c to the -Z side. The incident surface 101 faces the -X side and receives light incident from the -X side. For example, light from the headlights of another vehicle present behind the vehicle 5 may be incident on the incident surface 101a. The optical element 100 may be formed of any light-transmitting material. The optical element 100 may be formed of glass, quartz, transparent plastic, or the like.

[0022] As shown in Fig. 4, the display device 1 further includes a substrate 13, a substrate 14, an FFC (Flexible Flat Cable) 15, and a sensor 16. Fig. 4 is a cross-sectional view showing the configuration of the display device. Fig. 4 illustrates a cross section taken along line AA in Fig. 3.

[0023] Substrate 13 is disposed on the +X side of display panel 12 and is housed within housing 10. Substrate 13 extends in the YZ direction like a plate and has a substantially rectangular shape in a YZ plane view. Substrate 13 may be smaller in size than display panel 12 in a YZ plane view. The -Z side end of substrate 13 may be located on the +Z side of the -Z side end of display panel 12. Substrate 13 may have control circuit element 13a mounted on its +X side surface. Control circuit element 13a may include a circuit for controlling the reflectance of transmission-reflection unit 11.

[0024] The substrate 14 is disposed between the substrate 13 and the optical element 100. The substrate 14 is disposed on the -Z side of the substrate 13 and on the +Z side of the optical element 100, and is housed within the housing 10. The substrate 13 extends like a plate in the XY direction and has a substantially rectangular shape in the XY plane view. The substrate 14 may be larger in size than the optical element 100 in the XY plane view. The substrate 14 may have a control circuit element 14a mounted on the surface on the +Z side. The control circuit element 14a may include a circuit for controlling the reflectance of the transmission-reflection unit 11.

[0025] The FFC 15 may be a flexible film-like cable. The FFC 15 is disposed between the control circuit element 13a and the control circuit element 14a. One end of the FFC 15 is electrically connected to the control circuit element 13a, and the other end is electrically connected to the control circuit element 14a.

[0026] The sensor 16 is mounted on the -Z side surface of the substrate 14 and housed within the housing 10. The sensor 16 is capable of detecting the amount of light. The sensor 16 is an illuminance sensor and may be, for example, a silicon photosensor. The area of the light-receiving region 161 (see FIG. 10) of the sensor 16 is A1. The sensor 16 can accumulate electric charges corresponding to the light received by the light-receiving surface and output a signal corresponding to the accumulated electric charges as a detection result. The sensor 16 may be electrically connected to the control circuit element 14a via wiring within the substrate 14. Thereby, the sensor 16 can transmit the detection result to the control circuit element 13a via the wiring within the substrate 14, the control circuit element 14a, and the FFC 15. Thereby, the control circuit element 13a can adjust the reflectance of the transmissive-reflective portion 11 to a reflectance corresponding to the amount of light detected by the sensor 16.

[0027] For example, when the display device 1 is operating in the mirror mode, the control circuit element 13a controls the reflectance of the transmissive-reflective portion 11 to RR1 during steady state, and when the amount of light detected by the sensor 16 exceeds the threshold amount of light, controls the reflectance of the transmissive-reflective portion 11 to RR2 (<RR1). Thereby, when light from the headlight of a vehicle behind the vehicle 5 is received by the surface 1a, the intensity of the light reflected by the surface 1a and visible to the passengers of the vehicle 5 can be suppressed, improving the convenience for the passengers of the vehicle 5.

[0028] The optical member 100 is arranged on the -Z side of the sensor 16. As shown in FIGS. 5 to 7, the optical member 100 has a plurality of mutually connected reflecting surfaces 102a to 102i. FIG. 5 is a perspective view showing the configuration of the optical member 100. FIG. 6 is an XZ cross-sectional view showing the configuration of the optical member 100 and is an enlarged XZ cross-sectional view of part B in FIG. 4 as viewed from the -Y direction. FIG. 7 is an XY cross-sectional view showing the configuration of the optical member 100 and shows the cross-section when FIG. 6 is cut along the C-C line.

[0029] The optical element 100 has an incident surface 101, a group of reflecting surfaces 102, and an exit surface 103. The incident surface 101 is disposed on the -X side or -Z side of the optical element 100, is exposed as an outer surface of the optical element 100, and faces the -X side. The reflecting surface group 102 is disposed on the +X side of the incident surface 101. The reflecting surface group 102 is disposed on the +X side or -Z side of the optical element 100, and faces a direction inclined toward the -X side or +Z side within the optical element 100. The exit surface 103 is disposed on the +Z side of the reflecting surface group 102. The exit surface 103 is disposed on the +Z side of the optical element 100, is exposed as an outer surface of the optical element 100, and faces the +Z side.

[0030] Optical element 100 receives light incident from the -X side at incident surface 101, reflects the received light at reflecting surface group 102, and emits the reflected light from exit surface 103 to guide it to sensor 16. Reflecting surface group 102 is disposed between incident surface 101 and exit surface 103 on the optical path.

[0031] The group of reflecting surfaces 102 includes a plurality of reflecting surfaces 102a-102i that are connected to one another. The plurality of reflecting surfaces 102a-102i form a polygonal surface that bulges outward from an imaginary plane VP toward the side opposite the incident side. The imaginary plane VP is defined by the outer contours of the plurality of reflecting surfaces 102a-102i (see FIG. 5). This allows the optical element 100 to guide incident light from the -X side to the sensor 16 over a wide angular range, thereby expanding the angular range over which the sensor 16 can detect the amount of light.

[0032] The incident surface 101 has a plurality of convex surfaces 101a_1 to 101a_5, 101b_1 to 101b_5, 101c_1 to 101c_5, and 101d_1 to 104d_5. Each of the convex surfaces 101a_1 to 104d_5 includes a curved surface that is convex toward the -X side. This allows the optical member 100 to receive light at the incident surface 101 over a wide angle range.

[0033] In this specification, the angle of incidence of light with respect to the incident surface 101 will be considered to be the angle of incidence in the vertical direction and the angle of incidence in the horizontal direction. The incident surface 101 is considered to be a surface roughly aligned along the YZ direction, and the -X direction is the normal direction of the incident surface 101. When viewed from the -Y direction, the angle of incidence in the vertical direction with respect to the incident surface 101 is defined as a positive angle when it is angled clockwise with respect to the -X direction, and a negative angle when it is angled counterclockwise with respect to the -X direction. When viewed from the +Z direction, the angle of incidence in the horizontal direction with respect to the incident surface 101 is defined as a positive angle when it is angled clockwise with respect to the -X direction, and a negative angle when it is angled counterclockwise with respect to the -X direction.

[0034] The plurality of reflecting surfaces 102a to 102i included in the reflecting surface group 102 are inclined to one another and connected to form a polygonal surface.

[0035] In this specification, the inclination angles of the two reflecting surfaces are considered to be the inclination angle in the vertical direction and the inclination angle in the horizontal direction. The inclination angle of the first reflecting surface in the vertical direction relative to the second reflecting surface, when viewed from the -Y direction, is defined as a positive angle when it is angled clockwise with respect to the second reflecting surface, and a negative angle when it is angled counterclockwise with respect to the second reflecting surface. The inclination angle of the first reflecting surface in the horizontal direction relative to the second reflecting surface, when viewed from the +Z direction, is defined as a positive angle when it is angled clockwise with respect to the second reflecting surface, and a negative angle when it is angled counterclockwise with respect to the second reflecting surface.

[0036] The multiple reflecting surfaces 102a-102i are obtained by dividing the virtual plane VP into 3 x 3 sections and deforming the 3 x 3 reflecting surfaces so that they bulge out to the side opposite the incident side while maintaining their interconnected state. The multiple reflecting surfaces 102a-102i are connected to each other via straight sides.

[0037] At this time, the plurality of reflecting surfaces 102a to 102i are inclined at angles to one another. Of the plurality of reflecting surfaces 102a to 102i, the reflecting surface 102b extends along the imaginary plane VP, and the reflecting surfaces 102a and 102c to 102i extend at an angle relative to the imaginary plane VP.

[0038] The multiple reflecting surfaces 102a to 102i may share and reflect incident light at different angles of incidence. Reflecting surface 102b shares incident light with a relatively small angle of incidence. Reflecting surfaces 102a and 102c share incident light with a relatively large vertical angle of incidence on the positive and negative sides, respectively. Reflecting surfaces 102e and 102h share incident light with a relatively large horizontal angle of incidence on the positive and negative sides, respectively. Reflecting surfaces 102d and 102g share incident light with a relatively large vertical angle of incidence on the positive side and a relatively large horizontal angle of incidence on the positive and negative sides, respectively. Reflecting surfaces 102i and 102f share incident light with a relatively large vertical angle of incidence on the negative side and a relatively large horizontal angle of incidence on the positive and negative sides, respectively.

[0039] Each of the reflecting surfaces 102a to 102i has a substantially rectangular shape in a plan view. The areas of the reflecting surfaces 102a to 102i may be equal to one another. The area of ​​each of the reflecting surfaces 102a to 102i may be equal to or greater than the area A1 of the light receiving region 161 of the sensor 16. For example, the area of ​​each of the reflecting surfaces 102a to 102i is 1.5 mm×1.5 mm=2.25 mm. 2 The area of ​​each of the reflecting surfaces 102a to 102i is 3 mm × 3 mm = 9 mm 2 It is more preferable that the above is true.

[0040] Reflecting surface 102b is disposed at the center of the multiple reflecting surfaces 102a to 102i. Reflecting surface 102b is connected to reflecting surface 102a at its -Z side, to reflecting surface 102c at its +Z side, to reflecting surface 102e at its -Y side, and to reflecting surface 102h at its +Y side. Reflecting surface 102b has corners on the -Y and -Z sides that contact corners of reflecting surface 102d, corners on the -Y and +Z sides that contact corners of reflecting surface 102f, corners on the +Y and -Z sides that contact corners of reflecting surface 102g, and corners on the +Y and +Z sides that contact corners of reflecting surface 102i. Reflecting surface 102b may be approximately parallel to imaginary plane VP (see FIGS. 6 and 7). The area of ​​reflecting surface 102b may be smaller than the areas of the other reflecting surfaces 102a and 102c to 102i.

[0041] Reflecting surface 102a is disposed on the -Z side of reflecting surface 102b and is connected to reflecting surface 102b at its +Z side. Reflecting surface 102a is inclined with respect to reflecting surface 102b so that the -Z side is closer to imaginary plane VP than the +Z side. The angle formed by reflecting surface 102a and imaginary plane VP corresponds to the angle of incidence of light with respect to incident surface 101. The angle formed by reflecting surface 102a and reflecting surface 102b corresponds to the angle of incidence of light with respect to incident surface 101. The horizontal inclination angle θah of reflecting surface 102a with respect to reflecting surface 102b corresponds to the horizontal angle of incidence of light that should be covered by reflecting surface 102a. The vertical inclination angle θav of reflecting surface 102a with respect to reflecting surface 102b corresponds to the vertical angle of incidence of light that should be covered by reflecting surface 102a.

[0042] The reflecting surface 102a is responsible for incident light having a relatively large vertical incidence angle on the positive side. The angle formed by the reflecting surfaces 102a and 102b may be approximately ¼ of the incidence angle of the incident light to be covered by the reflecting surface 102a. When the optical element 100 is to cover incident light having a vertical incidence angle of −10° or more and +10° or less, the reflecting surface 102a may have a vertical inclination angle θav of approximately 2.5° with respect to the reflecting surface 102b. The reflecting surface 102a may have a horizontal inclination angle θah (see FIG. 6) of approximately zero with respect to the reflecting surface 102b.

[0043] Reflecting surface 102c is disposed on the +Z side of reflecting surface 102b and is connected to reflecting surface 102b at its -Z side. Reflecting surface 102c is inclined with respect to reflecting surface 102b so that the +Z side is closer to virtual plane VP than the -Z side. The angle formed by reflecting surface 102c and virtual plane VP corresponds to the angle of incidence of light with respect to incident surface 101. The angle formed by reflecting surface 102c and reflecting surface 102b corresponds to the angle of incidence of light with respect to incident surface 101. The horizontal inclination angle θch of reflecting surface 102c with respect to reflecting surface 102b corresponds to the horizontal angle of incidence of light that should be covered by reflecting surface 102c. The vertical inclination angle θcv of reflecting surface 102c with respect to reflecting surface 102b corresponds to the vertical angle of incidence of light that should be covered by reflecting surface 102c.

[0044] The reflecting surface 102c is responsible for incident light having a relatively large vertical incidence angle on the positive side. The angle formed by the reflecting surface 102c and the reflecting surface 102b may be approximately ¼ of the incidence angle of the incident light to be covered by the reflecting surface 102c. When the optical element 100 is to cover incident light having a vertical incidence angle of −10° or more and +10° or less, the reflecting surface 102c may have a vertical inclination angle θcv (see FIG. 6) of approximately −2.5° with respect to the reflecting surface 102b. The reflecting surface 102c may have a horizontal inclination angle θch of approximately zero with respect to the reflecting surface 102b.

[0045] Reflecting surface 102d is disposed on the -Y and -Z sides of reflecting surface 102b, and its corners on the +Y and +Z sides are in contact with the corners of reflecting surface 102b. Reflecting surface 102d is inclined with respect to reflecting surface 102b so that its corners on the -Y and -Z sides are closer to virtual plane VP than its corners on the +Y and +Z sides. The angle formed by reflecting surface 102d and virtual plane VP corresponds to the angle of incidence of light with respect to incident surface 101. The angle formed by reflecting surface 102d and reflecting surface 102b corresponds to the angle of incidence of light with respect to incident surface 101. The horizontal inclination angle θdh of reflecting surface 102d with respect to reflecting surface 102b corresponds to the horizontal angle of incidence of light that should be covered by reflecting surface 102d. The vertical inclination angle θdv of reflecting surface 102d with respect to reflecting surface 102b corresponds to the vertical angle of incidence of light that should be covered by reflecting surface 102d. The absolute value of the tilt angle θdv in the vertical direction may be smaller than the absolute value of the tilt angle θdh in the horizontal direction.

[0046] The reflecting surface 102d is responsible for incident light having a relatively large positive vertical angle of incidence and a relatively large positive horizontal angle of incidence. The angle formed by the reflecting surface 102d and the reflecting surface 102b may be approximately ¼ of the incident angle of the incident light to be covered by the reflecting surface 102d. When the optical element 100 is to cover incident light having a vertical angle of incidence of -10° to +10° and a horizontal angle of incidence of -35° to +35°, the reflecting surface 102d may have a vertical inclination angle θdv of approximately 2.5° with respect to the reflecting surface 102b. The reflecting surface 102d may have a horizontal inclination angle θdh of approximately 10° with respect to the reflecting surface 102b.

[0047] Reflecting surface 102e is disposed on the -Y side of reflecting surface 102b and is connected to reflecting surface 102b at its +Y side edge. Reflecting surface 102e is inclined with respect to reflecting surface 102b so that its -Y side edge is closer to virtual plane VP than its +Y side edge. The angle between reflecting surface 102e and virtual plane VP corresponds to the angle of incidence of light with respect to incident surface 101. The angle between reflecting surface 102e and reflecting surface 102b corresponds to the angle of incidence of light with respect to incident surface 101. The horizontal inclination angle θeh of reflecting surface 102e with respect to reflecting surface 102b corresponds to the horizontal angle of incidence of light that should be covered by reflecting surface 102e. The vertical inclination angle θev of reflecting surface 102e with respect to reflecting surface 102b corresponds to the vertical angle of incidence of light that should be covered by reflecting surface 102e. The absolute value of the vertical inclination angle θev may be smaller than the absolute value of the horizontal inclination angle θeh.

[0048] The reflecting surface 102e is responsible for incident light having a relatively large horizontal incidence angle on the positive side. The angle formed by the reflecting surface 102e and the reflecting surface 102b may be approximately ¼ of the incidence angle of the incident light to be covered by the reflecting surface 102e. When the optical element 100 is to cover incident light having a horizontal incidence angle of −35° or more and +35° or less, the reflecting surface 102e may have a horizontal inclination angle θeh (see FIG. 6) of approximately 10° with respect to the reflecting surface 102b. The reflecting surface 102e may have a vertical inclination angle θav of approximately zero with respect to the reflecting surface 102b.

[0049] Reflecting surface 102f is disposed on the -Y and +Z sides of reflecting surface 102b, and its +Y and -Z corners are in contact with the corners of reflecting surface 102b. Reflecting surface 102f is inclined with respect to reflecting surface 102b so that its -Y and +Z corners are closer to virtual plane VP than its +Y and -Z corners. The angle between reflecting surface 102f and virtual plane VP corresponds to the angle of incidence of light with respect to incident surface 101. The angle between reflecting surface 102f and reflecting surface 102b corresponds to the angle of incidence of light with respect to incident surface 101. The horizontal inclination angle θfh of reflecting surface 102f with respect to reflecting surface 102b corresponds to the horizontal angle of incidence of light that should be covered by reflecting surface 102f. The vertical inclination angle θfv of reflecting surface 102f with respect to reflecting surface 102b corresponds to the vertical angle of incidence of light that should be covered by reflecting surface 102f. The absolute value of the tilt angle θfv in the vertical direction may be smaller than the absolute value of the tilt angle θfh in the horizontal direction.

[0050] The reflecting surface 102f is responsible for incident light having a relatively large negative vertical angle of incidence and a relatively large negative horizontal angle of incidence. The angle formed by the reflecting surface 102f and the reflecting surface 102b may be approximately ¼ of the incident angle of the incident light to be covered by the reflecting surface 102f. When the optical element 100 is to cover incident light having a vertical angle of incidence of -10° to +10° and a horizontal angle of incidence of -35° to +35°, the reflecting surface 102f may have a vertical inclination angle θfv of approximately -2.5° with respect to the reflecting surface 102b. The reflecting surface 102f may have a horizontal inclination angle θfh of approximately 10° with respect to the reflecting surface 102b.

[0051] Reflecting surface 102g is disposed on the +Y and -Z sides of reflecting surface 102b, and its corners on the -Y and +Z sides are in contact with the corners of reflecting surface 102b. Reflecting surface 102g is inclined with respect to reflecting surface 102b so that its corners on the +Y and -Z sides are closer to imaginary plane VP than its corners on the -Y and +Z sides. The angle formed by reflecting surface 102g and imaginary plane VP corresponds to the angle of incidence of light with respect to incident surface 101. The angle formed by reflecting surface 102g and reflecting surface 102b corresponds to the angle of incidence of light with respect to incident surface 101. The horizontal inclination angle θgh of reflecting surface 102g with respect to reflecting surface 102b corresponds to the horizontal angle of incidence of light that should be covered by reflecting surface 102g. The vertical inclination angle θgv of reflecting surface 102g with respect to reflecting surface 102b corresponds to the vertical angle of incidence of light that should be covered by reflecting surface 102g. The absolute value of the tilt angle θgv in the vertical direction may be smaller than the absolute value of the tilt angle θgh in the horizontal direction.

[0052] The reflecting surfaces 102g are each responsible for incident light having a relatively large positive vertical incidence angle and a relatively large negative horizontal incidence angle. The angle formed by the reflecting surfaces 102a and 102b may be approximately ¼ of the incidence angle of the incident light to be covered by the reflecting surface 102a. When the optical element 100 is intended to cover incident light having a vertical incidence angle of −10° or more and +10° or less, the reflecting surface 102g may have a vertical inclination angle θgv of approximately 2.5° with respect to the reflecting surface 102b. The reflecting surface 102g may have a horizontal inclination angle θgh of approximately −10° with respect to the reflecting surface 102b.

[0053] Reflecting surface 102h is disposed on the +Y side of reflecting surface 102b and is connected to reflecting surface 102b at its -Y side edge. Reflecting surface 102h is inclined with respect to reflecting surface 102b so that its +Y side edge is closer to virtual plane VP than its -Y side edge. The angle formed by reflecting surface 102h and virtual plane VP corresponds to the angle of incidence of light with respect to incident surface 101. The angle formed by reflecting surface 102h and reflecting surface 102b corresponds to the angle of incidence of light with respect to incident surface 101. The horizontal inclination angle θhh of reflecting surface 102h with respect to reflecting surface 102b corresponds to the horizontal angle of incidence of light that should be covered by reflecting surface 102h. The vertical inclination angle θhv of reflecting surface 102h with respect to reflecting surface 102b corresponds to the vertical angle of incidence of light that should be covered by reflecting surface 102h. The absolute value of the vertical inclination angle θhv may be smaller than the absolute value of the horizontal inclination angle θhh.

[0054] The reflecting surface 102h is responsible for incident light having a relatively large negative horizontal angle of incidence. The angle formed by the reflecting surface 102h and the reflecting surface 102b may be approximately ¼ of the angle of incidence of the incident light to be covered by the reflecting surface 102h. When the optical element 100 is to cover incident light having a horizontal angle of incidence between −35° and +35°, the reflecting surface 102h may have a horizontal inclination angle θhh (see FIG. 6) of approximately −10° with respect to the reflecting surface 102b. The reflecting surface 102h may have a vertical inclination angle θhv of approximately zero with respect to the reflecting surface 102b.

[0055] Reflecting surface 102i is disposed on the +Y and +Z sides of reflecting surface 102b, and its -Y and -Z corners are in contact with the corners of reflecting surface 102b. Reflecting surface 102i is inclined with respect to reflecting surface 102b so that its +Y and +Z corners are closer to virtual plane VP than its -Y and -Z corners. The angle formed by reflecting surface 102i and virtual plane VP corresponds to the angle of incidence of light with respect to incident surface 101. The angle formed by reflecting surface 102i and reflecting surface 102b corresponds to the angle of incidence of light with respect to incident surface 101. The horizontal inclination angle θih of reflecting surface 102i with respect to reflecting surface 102b corresponds to the horizontal angle of incidence of light that should be covered by reflecting surface 102i. The vertical inclination angle θiv of reflecting surface 102i with respect to reflecting surface 102b corresponds to the vertical angle of incidence of light that should be covered by reflecting surface 102i. The absolute value of the tilt angle θiv in the vertical direction may be smaller than the absolute value of the tilt angle θih in the horizontal direction.

[0056] The reflecting surface 102i is responsible for incident light having a relatively large negative vertical angle of incidence and a relatively large positive horizontal angle of incidence. The angle formed by the reflecting surface 102i and the reflecting surface 102b may be approximately ¼ of the incident angle of the incident light to be covered by the reflecting surface 102i. When the optical element 100 is intended to cover incident light having a vertical angle of incidence of -10° to +10° and a horizontal angle of incidence of -35° to +35°, the reflecting surface 102i may have a vertical inclination angle θgv of approximately -2.5° with respect to the reflecting surface 102b. The reflecting surface 102i may have a horizontal inclination angle θfh of approximately -10° with respect to the reflecting surface 102b.

[0057] For example, the reflecting surface 102b is approximately parallel to the imaginary plane VP, and light LBb incident on the incident surface 101 along the X direction is reflected by the reflecting surface 102b and easily guided to the sensor 16, as shown by the dotted arrow in Fig. 8. However, light LBa incident on the incident surface 101 from a direction tilted toward the -X side or +Z side with respect to the X direction may be emitted in a direction away from the sensor 16 when reflected by the imaginary plane VP. Light LBc incident on the incident surface 101 from a direction tilted toward the -X side or -Z side with respect to the X direction may be emitted in a direction away from the sensor 16 when reflected by the imaginary plane VP.

[0058] On the other hand, the reflecting surface 102a is inclined perpendicularly to the imaginary plane VP at an inclination angle θav (>0). Therefore, light LBa incident on the incident surface 101 from a direction inclined toward the −X side and +Z side with respect to the X direction is reflected by the reflecting surface 102a and easily guided to the sensor 16, as shown by the dashed-dotted arrow in FIG.

[0059] The reflecting surface 102c is inclined perpendicularly to the imaginary plane VP at an inclination angle θcv (<0). Therefore, light LBc incident on the incident surface 101 from a direction inclined toward the −X side or −Z side with respect to the X direction is reflected by the reflecting surface 102c and easily guided to the sensor 16, as indicated by the two-dot chain arrow in FIG.

[0060] As shown in FIG. 8, by including in the group of reflecting surfaces 102 reflecting surfaces 102b that are approximately parallel to the virtual plane VP, as well as reflecting surfaces 102a that are inclined to the positive side and reflecting surfaces 102a that are inclined to the negative side with respect to the reflecting surface 102b, the range of angles over which light can be guided to the sensor 16 at vertical incident angles can be easily expanded.

[0061] This is shown by the solid line in Fig. 9, which is a graph illustrating the vertical angle dependency of sensor sensitivity. Fig. 9 shows that the fluctuation width ΔSv of sensor sensitivity is relatively small and is kept within an allowable range in the vertical incident angle range of -10° to +10°. In other words, it can be seen that the structure of the reflecting surface group 102 shown in Figs. 6 and 8 makes it possible to ensure a vertical incident angle range of -10° to +10°.

[0062] 10, light LBb incident on the incident surface 101 in the X direction is reflected by the reflecting surface 102b and easily guided to the sensor 16. However, light LBe incident on the incident surface 101 from a direction tilted toward the -X side or the -Y side with respect to the X direction may be emitted in a direction away from the sensor 16 when reflected by the imaginary plane VP. Light LBh incident on the incident surface 101 from a direction tilted toward the -X side or the +Y side with respect to the X direction may be emitted in a direction away from the sensor 16 when reflected by the imaginary plane VP.

[0063] On the other hand, the reflecting surface 102e is inclined perpendicularly to the virtual plane VP at an inclination angle θeh (>0). Therefore, light LBe incident on the incident surface 101 from a direction inclined toward the −X side or −Y side with respect to the X direction is reflected by the reflecting surface 102e and easily guided to the sensor 16, as shown by the dashed-dotted arrow in FIG.

[0064] The reflecting surface 102h is inclined horizontally at an inclination angle θhh (<0) with respect to the imaginary plane VP. Therefore, light LBh incident on the incident surface 101 from a direction inclined toward the -X side and +Y side with respect to the X direction is reflected by the reflecting surface 102h and easily guided to the sensor 16, as shown by the two-dot chain arrow in FIG.

[0065] As shown in FIG. 10, by including in the group of reflecting surfaces 102 a reflecting surface 102e inclined to the positive side and a reflecting surface 102h inclined to the negative side with respect to the reflecting surface 102b in addition to the reflecting surface 102b that is approximately parallel to the virtual plane VP, the range of angles over which light can be guided to the sensor 16 at horizontal incident angles can be easily expanded.

[0066] This is shown by the solid line in Fig. 11, which is a graph illustrating the horizontal angle dependency of sensor sensitivity. Fig. 11 shows that the fluctuation width ΔSh of sensor sensitivity is relatively small and kept within an allowable range in the horizontal incident angle range of -35° to +35°. In other words, it can be seen that the structure of the reflecting surface group 102 shown in Figs. 7 and 10 makes it possible to ensure a horizontal incident angle range of -35° to +35°.

[0067] As described above, in this embodiment, the optical member 100 of the display device 1 has a plurality of reflective surfaces 102a-102i that are connected to one another. The reflective surfaces 102a-102i form a polygonal surface that bulges outward from the imaginary plane VP defined by the outer contours of the reflective surfaces 102a-102i toward the side opposite the incident side. This allows the optical member 100 to guide incident light from the -X side to the sensor 16 over a wide angular range, thereby expanding the angular range over which the sensor 16 can detect the amount of light. In other words, the light-guiding performance of obliquely incident light to the sensor 16 can be improved without using an expensive sensor.

[0068] In the group of reflecting surfaces 102 of the optical member 100, the plurality of reflecting surfaces 102a to 102i may have a mixture of reflecting surfaces with different areas. The area of ​​the reflecting surface 102b, which is located in the center of the plurality of reflecting surfaces 102a to 102i, may be smaller than the areas of the other reflecting surfaces 102a and 102c to 102i. The intensity of incident light with a relatively small angle of incidence is stronger than the intensity of incident light with a relatively large angle of incidence. Therefore, by making the area of ​​the reflecting surface 102b smaller than the areas of the other reflecting surfaces 102a and 102c to 102i, the intensities of light received by each reflecting surface 102a to 102i can be made closer to each other.

[0069] Alternatively, the group of reflecting surfaces of the optical element may be obtained by dividing the virtual plane VP into N×M portions and deforming the N×M reflecting surfaces so that they bulge out to the side opposite the incident side while maintaining their interconnected state. N is any integer equal to or greater than 2. M is any integer equal to or greater than 2. N and M may be the same or different from each other. The values ​​of N and M may be determined so that the area of ​​each reflecting surface after division is equal to or greater than the area A1 of the light receiving region 161 of the sensor 16. The values ​​of N and M may be determined so that the area of ​​each reflecting surface after division is equal to or greater than the area A2 (e.g., 2.25 mm ) obtained by adding a margin for optical error to the area A1. 2 ) or more. In the embodiment, a configuration in which N=3 and M=3 is exemplified.

[0070] For example, when N=2 and M=2, the optical element 200 may be configured as shown in FIGS. 12 to 14. FIG. 12 is a perspective view showing the configuration of the optical element 200 according to a modified example of the embodiment. FIG. 13 is an XZ cross-sectional view showing the configuration of the optical element 200 according to a modified example of the embodiment, and corresponds to the XZ enlarged cross-sectional view of part B in FIG. 4 as viewed from the -Y direction. FIG. 14 is an XY cross-sectional view showing the configuration of the optical element 200 according to a modified example of the embodiment, and shows a cross section when FIG. 13 is cut along line DD.

[0071] The optical element 200 has a group of reflecting surfaces 202 instead of the group of reflecting surfaces 102 (FIGS. 5 to 7). The group of reflecting surfaces 202 has a plurality of reflecting surfaces 202a to 202d that are connected to one another. The plurality of reflecting surfaces 202a to 202d form a polygonal surface that bulges out toward the opposite side of the incident side with respect to an imaginary plane VP. The imaginary plane VP is defined by the outer contours of the plurality of reflecting surfaces 202a to 202d (see FIG. 12). This allows the optical element 200 to guide incident light from the -X side to the sensor 16 over a wide angular range, thereby expanding the angular range over which the sensor 16 can detect the amount of light. Each of the reflecting surfaces 202a to 202d has a substantially triangular shape in a planar view.

[0072] The multiple reflecting surfaces 202a-202d are obtained by dividing the virtual plane VP into 2 x 2 and deforming the 2 x 2 reflecting surfaces so that they bulge out to the side opposite the incident side while maintaining their interconnected state. The multiple reflecting surfaces 202a-202d are connected to each other via straight sides.

[0073] At this time, the plurality of reflecting surfaces 202a to 202d are inclined at angles to one another. The plurality of reflecting surfaces 202a to 202d each extend at an angle to the imaginary plane VP.

[0074] The multiple reflecting surfaces 202a to 202d may share incident light at different angles of incidence. Reflecting surface 202a shares incident light at a relatively small angle of incidence and incident light at a relatively large positive angle of incidence in the vertical direction. Reflecting surface 202b shares incident light at a relatively small angle of incidence and incident light at a relatively large negative angle of incidence in the vertical direction. Reflecting surface 202c shares incident light at a relatively small angle of incidence and incident light at a relatively large positive angle of incidence in the horizontal direction. Reflecting surface 202d shares incident light at a relatively small angle of incidence and incident light at a relatively large negative angle of incidence in the horizontal direction.

[0075] Reflecting surface 202a is disposed on the -Z side of reflecting surfaces 202b to 202d, and is connected to reflecting surface 202c at its -Y and +Z sides, and to reflecting surface 202d at its +Y and +Z sides, with its +Z corner in contact with the corner of reflecting surface 202b. Reflecting surface 202a is inclined with respect to imaginary plane VP so that its -Z side edge is closer to imaginary plane VP than its +Z corner. The angle formed by reflecting surface 202a and imaginary plane VP corresponds to the angle of incidence of light with respect to incident surface 101. The horizontal inclination angle θah200 of reflecting surface 202a with respect to imaginary plane VP corresponds to the horizontal angle of incidence of light that should be covered by reflecting surface 202a. The vertical inclination angle θav200 of reflecting surface 202a with respect to imaginary plane VP corresponds to the vertical angle of incidence of light that should be covered by reflecting surface 202a.

[0076] The reflecting surface 202a is responsible for dividing incident light having a relatively small angle of incidence into incident light having a relatively large positive angle of incidence in the vertical direction. The angle formed by the reflecting surface 202a and the imaginary plane VP may be approximately ¼ of the angle of incidence of the incident light to be covered by the reflecting surface 202a. When the optical element 200 is to cover incident light having an incident angle in the vertical direction of −10° to +10°, the reflecting surface 202a may have a vertical inclination angle θav200 (see FIG. 13) of approximately 2.5° with respect to the imaginary plane VP. The reflecting surface 202a may have a horizontal inclination angle θah200 with respect to the imaginary plane VP of approximately zero.

[0077] Reflecting surface 202b is disposed on the +Z side of reflecting surfaces 202a, 202c, and 202d, and is connected to reflecting surface 202c at its -Y and -Z sides, and to reflecting surface 202d at its +Y and -Z sides, with its -Z corner in contact with the corner of reflecting surface 202a. Reflecting surface 202b is inclined with respect to imaginary plane VP so that its +Z side is closer to imaginary plane VP than its -Z corner. The angle formed by reflecting surface 202b and imaginary plane VP corresponds to the angle of incidence of light with respect to incident surface 101. The horizontal inclination angle θbh200 of reflecting surface 202b with respect to imaginary plane VP corresponds to the horizontal angle of incidence of light that should be covered by reflecting surface 202b. The vertical inclination angle θbv200 of reflecting surface 202b with respect to imaginary plane VP corresponds to the vertical angle of incidence of light that should be covered by reflecting surface 202b.

[0078] The reflecting surface 202b is responsible for dividing incident light having a relatively small angle of incidence and incident light having a relatively large negative angle of incidence in the vertical direction. The angle formed by the reflecting surface 202b and the imaginary plane VP may be approximately 1 / 4 of the angle of incidence of the incident light to be covered by the reflecting surface 202b. When the optical element 200 is to cover incident light having an angle of incidence in the vertical direction of -10° or more and +10° or less, the reflecting surface 202b may have a vertical inclination angle θbv200 (see FIG. 13) of approximately -2.5° with respect to the imaginary plane VP. The reflecting surface 202b may have a horizontal inclination angle θbh200 with respect to the imaginary plane VP of approximately zero.

[0079] Reflecting surface 202c is disposed on the -Y side of reflecting surfaces 202a, 202b, and 202d, and is connected to reflecting surface 202a at its +Y and -Z sides, and connected to reflecting surface 202b at its +Y and +Z sides, with its +Y corner in contact with the corner of reflecting surface 202d. Reflecting surface 202c is inclined with respect to imaginary plane VP so that its -Y side edge is closer to imaginary plane VP than its +Y corner. The angle formed by reflecting surface 202c and imaginary plane VP corresponds to the angle of incidence of light with respect to incident surface 101. The horizontal inclination angle θch200 of reflecting surface 202c with respect to imaginary plane VP corresponds to the horizontal angle of incidence of light that should be covered by reflecting surface 202c. The vertical inclination angle θcv200 of reflecting surface 202c with respect to imaginary plane VP corresponds to the vertical angle of incidence of light that should be covered by reflecting surface 202c.

[0080] The reflecting surface 202c is responsible for dividing incident light having a relatively small angle of incidence into incident light having a relatively large positive horizontal angle of incidence. The angle formed by the reflecting surface 202c and the imaginary plane VP may be approximately ¼ of the angle of incidence of the incident light to be covered by the reflecting surface 202c. When the optical element 200 is to cover incident light having a horizontal angle of incidence of −35° or more and +35° or less, the reflecting surface 202c may have a horizontal inclination angle θch200 (see FIG. 14) of approximately 10° with respect to the imaginary plane VP. The reflecting surface 202c may have a vertical inclination angle θcv200 with respect to the imaginary plane VP of approximately zero.

[0081] Reflecting surface 202d is disposed on the +Y side of reflecting surfaces 202a-202c, and is connected to reflecting surface 202a at its -Y and -Z sides, and connected to reflecting surface 202b at its -Y and +Z sides, with its -Y corner in contact with the corner of reflecting surface 202c. Reflecting surface 202d is inclined with respect to imaginary plane VP so that its +Y side is closer to imaginary plane VP than its -Y corner. The angle formed by reflecting surface 202d and imaginary plane VP corresponds to the angle of incidence of light with respect to incident surface 101. The horizontal inclination angle θdh200 of reflecting surface 202d with respect to imaginary plane VP corresponds to the horizontal angle of incidence of light that should be covered by reflecting surface 202d. The vertical inclination angle θdv200 of reflecting surface 202d with respect to imaginary plane VP corresponds to the vertical angle of incidence of light that should be covered by reflecting surface 202d.

[0082] The reflecting surface 202d is responsible for dividing incident light having a relatively small angle of incidence and incident light having a relatively large negative horizontal angle of incidence. The angle formed by the reflecting surface 202d and the imaginary plane VP may be approximately ¼ of the angle of incidence of the incident light to be covered by the reflecting surface 202d. When the optical element 200 is to cover incident light having a horizontal angle of incidence of −35° or more and +35° or less, the reflecting surface 202d may have a horizontal inclination angle θdh200 (see FIG. 14) of approximately −10° with respect to the imaginary plane VP. The reflecting surface 202d may have a vertical inclination angle θdv200 with respect to the imaginary plane VP of approximately zero.

[0083] In this optical element 200, the plurality of interconnected reflecting surfaces 202a-202d also form a polygonal surface that bulges outward from the incident side relative to an imaginary plane VP defined by the outer contours of the plurality of reflecting surfaces 202a-202d. This allows the optical element 200 to guide incident light from the -X side to the sensor 16 over a wide angular range, thereby expanding the angular range over which the sensor 16 can detect the amount of light. In other words, the light-guiding performance to the sensor 16 for obliquely incident light can be improved without using an expensive sensor.

[0084] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, as well as within the scope of the invention described in the claims and their equivalents. [Explanation of symbols]

[0085] 1 Display device 11 Transmissive / reflective section 12 Display panel 16 sensors 100,200 Optical components 101 Incidence plane 102,202 Reflective surface group 102a~102i,202a~202d Reflective surface 161 Light receiving area VP Virtual Plane

Claims

1. A display panel; a transflective section disposed in front of the display panel; a sensor for detecting an amount of light corresponding to the incident light on the transmission / reflection unit; an optical member disposed around the transmission / reflection section, having a plurality of reflective surfaces connected to each other, receiving light, reflecting the light on the reflective surfaces, and guiding the reflected light to the sensor; Equipped with The plurality of reflecting surfaces form polygonal surfaces that bulge outward from the incident side with respect to a virtual plane defined by the outer contours of the plurality of reflecting surfaces. Display device.

2. The area of ​​each of the plurality of reflecting surfaces is equal to or greater than the area of ​​the light receiving region of the sensor. The display device according to claim 1 .

3. Each of the plurality of reflecting surfaces extends along the imaginary plane. The display device according to claim 1 .

4. The plurality of reflective surfaces are a first reflecting surface extending along the imaginary plane; a second reflecting surface extending at an angle with respect to the virtual plane; Contains The display device according to claim 1 .

5. the optical member further has an incident surface onto which light is incident, The angle formed between the second reflecting surface and the virtual plane corresponds to the angle of incidence of light with respect to the incident surface. The display device according to claim 4 .

6. the optical member further has an incident surface onto which light is incident, The angle formed between the first reflecting surface and the second reflecting surface corresponds to the angle of incidence of light with respect to the incident surface. The display device according to claim 4 .

7. The area of ​​the first reflecting surface is smaller than the area of ​​the second reflecting surface. The display device according to claim 4 .

8. an incident surface on which light is incident; an exit surface extending from an end of the incident surface in a direction intersecting the incident surface and facing a sensor that detects the amount of light; a plurality of reflective surfaces arranged between the incident surface and the exit surface in the optical path and connected to each other; Equipped with The plurality of reflecting surfaces form polygonal surfaces that bulge outward from the incident side with respect to a virtual plane defined by the outer contours of the plurality of reflecting surfaces. Optical components.

9. The area of ​​each of the plurality of reflecting surfaces is equal to or greater than the area of ​​the light receiving region of the sensor. The optical member according to claim 8 .

10. Each of the plurality of reflecting surfaces extends along the imaginary plane. The optical member according to claim 8 .

11. The plurality of reflective surfaces are a first reflecting surface extending along the imaginary plane; a second reflecting surface extending at an angle with respect to the virtual plane; Contains The optical member according to claim 8 .

12. the optical member further has an incident surface onto which light is incident, The angle formed between the second reflecting surface and the virtual plane corresponds to the angle of incidence of light with respect to the incident surface. The optical member according to claim 11.

13. the optical member further has an incident surface onto which light is incident, The angle formed between the first reflecting surface and the second reflecting surface corresponds to the angle of incidence of light with respect to the incident surface. The optical member according to claim 11.

14. The area of ​​the first reflecting surface is smaller than the area of ​​the second reflecting surface. The optical member according to claim 11.

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