JP2017117649A - Light guide and illumination light display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light guide and an illumination light display device capable of using an opposing side peripheral edge part opposing to a light incident part of a light guide sheet as an illumination light region.SOLUTION: A light guide 1 includes: a light guide sheet 20 which can transmit light from a light source 60 and which is formed in a sheet-shape in which one surface 20a side becomes an illumination light region 10a; and a reflection layer 40 which reflects the light leaking to the other surface 20b side of the light guide sheet 20. The light guide can illuminate the illumination light region 10a by the light which has entered from a light incident part 20c provided on a side surface of the light guide sheet 20 propagating. In a plan view from the one surface 20a side, the illumination light region 10a includes: a first illumination light region 10b including a plurality of illumination light patterns 21 for emitting light which has propagated in the light guide sheet 20; and a second illumination light region 10c located in a belt-like manner along an opposing side peripheral edge part 20d opposing to the light incident part 20c. The second illumination light region 10c includes a luminance correction part 22 for adjusting a difference with the luminance in the first illumination light region 10b.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a light guide and an illuminating display device capable of illuminating and displaying a display unit such as an electronic device.

  Various electronic devices and in-vehicle input devices are provided with a display unit that expresses symbols, graphics, and the like, and a light guide and an illumination display device that can illuminate the display unit with light emitted from a light source such as a light-emitting diode. ing.

  For example, Patent Literature 1 discloses an illuminated display device capable of switching display bodies. FIG. 8 is a cross-sectional view of a three-layer display body of the illuminated display device 900 described in Patent Document 1.

  In the illuminated display device 900, a first display body 903, a second display body 904, and a third display body 905 are stacked. The first display body 903, the second display body 904, and the third display body 905 have diffusion printing 933, 943, and 953 on the back surface of the light guide plates 932, 942, and 952 that have light sources 931, 941, and 951 at their ends. A transparent layer 934 that covers the back surface of the diffusion printing 933 and the light guide plate 932, and a transparent layer 944 that covers the back surface of the diffusion printing 943 and the light guide plate 942 are provided. The double-sided tapes 973a, 973b, 974a, 974b, 975a, 975b, 976a, and 976b are arranged on the outer periphery between the first display body 903, the second display body 904, the third display body 905, and the smoke film 906. Yes.

JP 2014-032265 A

  However, in the conventional illuminated display device, the opposite side of the light guide plate (light guide sheet) due to the influence of the light reflected on the end surface on the opposite side facing the end (light incident part) where the light from the light source enters. There has been a problem that a non-uniform luminance region occurs along the peripheral edge. In order to avoid this, the problem is that the opposite peripheral edge portion with non-uniform luminance must be covered with a light shielding layer added to the light guide sheet or hidden with a housing on the side where the light guide sheet is attached to make it an invisible region. was there.

  The present invention solves the above-described problems, and an object thereof is to provide a light guide and an illuminating display device that can also use an opposing peripheral edge facing a light incident portion of a light guide sheet as an illuminating region. .

  The light guide of the present invention is a light guide sheet that is formed in a sheet shape that can transmit light from a light source and has one side as an illumination region, a reflective layer that reflects light leaking to the other side of the light guide sheet, A light guide capable of illuminating the illuminating region by propagating light entering from a light incident portion provided on a side surface of the light guide sheet, and when illuminated in plan view from the one surface side, The region includes a first illumination region having a plurality of illumination patterns that emit light that has propagated through the light guide sheet, and a second illumination region that is positioned in a belt shape along the opposing peripheral edge facing the light incident portion. The second illumination area includes a brightness correction unit that adjusts a difference from the brightness of the first illumination area.

  According to this configuration, the second illumination region located in a strip shape along the opposite peripheral edge portion facing the light incident portion of the light guide sheet includes the luminance correction unit, and the first correction region and the second illumination region are provided by the luminance correction unit. The brightness difference from the illumination area is adjusted. Thereby, a light guide sheet can be used as an illumination area, without concealing the vicinity of the opposing side peripheral part which opposes a light-incidence part. By making the illumination region up to the vicinity of the opposing peripheral edge facing the light incident portion of the light guide sheet, the space efficiency is good and the size can be reduced.

  In the light guide of the present invention, the illumination pattern of the first illumination region has a shape that gradually increases from the light incident part side toward the second illumination region side, and the light illumination pattern of the second illumination region The brightness correction unit includes a plurality of correction patterns provided in a shape similar to the illumination pattern, and the correction pattern is smaller in shape than the largest illumination pattern located in the vicinity of the second illumination region. It is characterized by providing.

  According to this configuration, by setting the luminance correction unit to a correction pattern having a similar shape that is smaller than the shape of the illumination pattern of the first illumination region, the light emitted from the second illumination region is reduced, so the luminance of the second illumination region is reduced. It can be adjusted so that it is not too strong. Moreover, since the brightness correction unit can be formed together with the illumination pattern of the first illumination area, the second illumination area can be easily provided.

  In the light guide of the present invention, the correction pattern gradually decreases in the vicinity of the boundary between the second illumination area and the first illumination area from the first illumination area side toward the opposing peripheral edge side. It has the shape which becomes.

  According to this configuration, since the shape of the correction pattern gradually changes, it becomes difficult to visually recognize the boundary between the first illumination area and the second illumination area.

  Moreover, the light guide of the present invention is characterized in that the illumination pattern is disposed on the one surface side of the light guide sheet and has a concave shape that is recessed toward the other surface side.

  According to this configuration, light that has propagated through the light guide sheet can be efficiently emitted. Moreover, it can form easily.

  Further, the light guide of the present invention has a support layer for fixing the light guide sheet on the other surface side of the light guide sheet, and the support layer is disposed at least along the opposite peripheral edge portion. And overlapping with the second illumination region in plan view.

  According to this configuration, since the second illumination region is provided so as to overlap with the support layer, which is one of the causes of non-uniform luminance, in the plan view, the support layer is disposed along the opposing peripheral edge. A difference from the luminance of the first illumination area caused by the luminance correction unit can be adjusted.

  In the light guide of the present invention, the support layer is colored according to a color tone that illuminates the illumination region.

  According to this configuration, by changing the color of the support layer in accordance with the color of the light to be emitted, the difference in color tone from the first illumination region can be reduced.

  In the light guide of the present invention, the reflective layer is a reflective sheet fixed to the light guide sheet via the support layer.

  According to this structure, a brightness | luminance can be raised by using a reflective sheet. It can also be used to adjust the color tone by changing the color of the reflective sheet.

  In addition, an illuminated display device according to the present invention includes the light guide described above and a light source arranged so that light can enter the light incident portion.

  According to this configuration, by using the light guide that adjusts the difference in luminance between the first illumination region and the second illumination region along the opposing side periphery, and using the light guide as the illumination region up to the opposing side periphery, space efficiency is improved. Good and can be downsized.

  According to the present invention, the second illumination region located in a strip shape along the opposite peripheral edge portion facing the light incident portion of the light guide sheet includes the luminance correction unit, and the first correction region and the second illumination region are provided by the luminance correction unit. The brightness difference from the illumination area is adjusted. Thereby, a light guide sheet can be used as an illumination area, without concealing the vicinity of the opposing side peripheral part which opposes a light-incidence part. Therefore, the light guide of the present invention is space efficient and can be miniaturized by using the illumination region as far as the opposing peripheral edge. In addition, according to the present invention, it is possible to provide an illuminated display device that can also use the opposed peripheral edge portion facing the light incident portion of the light guide sheet as an illuminated region.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external view which shows the illumination display apparatus and light guide of 1st Embodiment of this invention, Fig.1 (a) is a top view, FIG.1 (b) is a front view. It is a disassembled perspective view which shows the illuminated display apparatus and light guide of 1st Embodiment of this invention. It is a schematic plan view which shows the light guide of 1st Embodiment of this invention. It is the schematic cross section cut | disconnected by the IV-IV line of FIG. It is a disassembled perspective view which shows the illumination display apparatus and light guide of a comparative example. It is a disassembled perspective view which shows the illumination display apparatus and light guide of 2nd Embodiment of this invention. It is a disassembled perspective view which shows the illumination display apparatus and light guide of a comparative example. It is sectional drawing of the display body which consists of three layers of the conventional illuminated display apparatus.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. For easy understanding, the dimensions of the drawings are appropriately changed.

[First Embodiment]
FIG. 1 is an external view showing an illuminated display device 100 and a light guide 1 according to a first embodiment of the present invention, FIG. 1 (a) is a plan view, and FIG. 1 (b) is a front view. FIG. 2 is an exploded perspective view showing the illumination display device 100 and the light guide 1. FIG. 3 is a schematic plan view showing the light guide 1 according to the first embodiment of the present invention. 4 is a schematic cross-sectional view taken along line IV-IV in FIG. The dimensions in the Z1-Z2 direction are enlarged and displayed in an easy-to-understand manner.

  As shown in FIGS. 1 and 2, the illuminated display device 100 of this embodiment includes a light guide 1, a light source 60, and a base 70. The light guide 1 of the present embodiment includes a light guide sheet 20 formed in a sheet shape, a support layer 30 for fixing the light guide sheet 20, and a reflection sheet 41.

  The light guide sheet 20 is a transparent or translucent translucent synthetic resin sheet, and is provided in a substantially rectangular flat plate shape. The light guide sheet 20 can be formed of, for example, a synthetic resin material such as polycarbonate or acrylic. As will be described later, a plurality of illumination patterns 21 and a plurality of correction patterns 23 are formed on the light guide sheet 20, but specific shapes are omitted in FIGS. 1 and 2.

  As shown in FIG. 2, the support layer 30 has an outer shape substantially the same as the outer shape of the light guide sheet 20, and is provided in a frame shape having an opening 30 a at the center. The support layer 30 is composed of a double-sided adhesive tape having an adhesive material on both sides of a base film made of a transparent or translucent light-transmitting synthetic resin sheet. Note that the support layer 30 may be colored so as to have a specific color tone. In order to color the support layer 30, for example, an ink containing a coloring pigment is printed on a transparent or translucent light-transmitting synthetic resin sheet using a method such as screen printing, and the ink is cured. Thus, a base film is formed.

  The reflection sheet 41 functions as a reflection layer 40 that reflects light leaking to the other surface 20 b side of the light guide sheet 20. The reflection sheet 41 is composed of a synthetic resin sheet (for example, PET). As the reflection sheet 41, for example, a white synthetic resin sheet can be used. In addition, a transparent or translucent translucent synthetic resin sheet is printed with a light scattering ink (white ink) containing, for example, titanium dioxide powder using a technique such as screen printing. You may form by hardening. The color tone may be adjusted by changing the color of the reflective sheet 41 by coloring in the same manner as the support layer 30.

  The light source 60 is configured by an LED (light emitting diode), and light is emitted from the light emitting unit 61. The light source 60 has a connection electrode portion (not shown) exposed and can be connected by solder or the like.

  The base 70 is composed of a printed wiring board. Wiring (not shown) is formed on the base 70 and is connected to the connection electrode portion of the light source 60 by solder or the like. In addition, a connector portion (not shown) is provided, and power can be supplied to the light source 60 from an external power supply circuit via wiring. The light guide 1 is attached to the base 70 by a fixing member (not shown), and is fixed so as not to be displaced with respect to the light source 60.

  In the illuminated display device 100 and the light guide 1 according to the present embodiment, the Z1 side surface 20a side of the light guide sheet 20 that can transmit light from the light source 60 is an illuminated region 10a, as will be described in detail below. 1 to 4, the light incident portion 20 c is provided on the X1 side surface of the light guide sheet 20, and light entering from the light incident portion 20 c facing the light source 60 is reflected by the one surface 20 a and the other surface 20 b. However, the illumination region 10 a can be illuminated by propagating through the light guide sheet 20. Here, the illumination region 10a is located between the second illumination region 10c located in a strip shape along the opposing peripheral edge 20d facing the light entrance 20c, and from the boundary position of the second illumination region 10c to the light entrance 20c side. And the first illumination region 10b. In the illumination region 10a, a plurality of illumination patterns 21 and a plurality of correction patterns 23 are formed so as to partition the first illumination region 10b and the second illumination region 10c. In addition, about the specific shape of the some illumination pattern 21 and the some correction pattern 23 which were abbreviate | omitted in FIG. 1 and FIG. 2, in FIG. 3, the one part is expanded and shown typically. Further, in FIG. 4, the shape in cross-sectional view is schematically shown so that the features of the correction pattern 23 can be easily understood.

  The plurality of illumination patterns 21 are arranged on the one surface 20a side of the light guide sheet 20 in order to emit light propagating through the light guide sheet 20 to the one surface 20a side. Each of the illumination patterns 21 has a concave shape that is recessed toward the other surface 20b, and is provided in the first illumination region 10b of the illumination region 10a. The illumination pattern 21 of the first illumination region 10b has a shape (similar shape in which the depth and area increase) that gradually increase from the X1 side from which the light entering from the light incident portion 20c propagates toward the X2 side. Yes. The illumination pattern 21 is not limited to the shape shown in FIG. 3 and FIG. 4, and may be any shape that allows the light propagating through the light guide sheet 20 to be emitted efficiently.

  The plurality of correction patterns 23 are provided in the second illumination area 10c of the illumination area 10a, and, like the illumination pattern 21 in the first illumination area 10b, emit light that has propagated through the light guide sheet 20 to the one surface 20a side. The light guide sheet 20 is disposed on the one surface 20a side. The correction pattern 23 is provided in a shape similar to the illumination pattern 21 and has a shape smaller than that of the largest illumination pattern 21 located in the vicinity of the second illumination region 10c. The correction pattern 23 further has a shape (depth and area are gradually reduced in the vicinity of the boundary between the second illumination region 10c and the first illumination region 10b from the first illumination region 10b side toward the opposing peripheral edge 20d side. (Similar shape that becomes smaller).

  Next, as a comparative example, a case where the configuration of the illumination display device 100 and the light guide 1 of the present embodiment is not provided will be described. FIG. 7 is an exploded perspective view showing an illumination display device and a light guide of a comparative example.

  As shown in FIG. 7, the illuminated display device 800 and the light guide 801 of the comparative example are provided with a light shielding film 811 so as to overlap the support layer 830 in plan view. The light shielding film 811 is formed, for example, by printing a light-shielding ink (black ink or the like) on the light guide sheet 820 using a method such as screen printing and curing the ink. The support layer 830, the reflection sheet 841, the light source 860, and the base 870 are the same as the support layer 30, the reflection sheet 41, the light source 60, and the base 70 of the illumination display device 100 and the light guide 1. The light guide sheet 820 is the same as the illumination pattern 21 of the illumination display device 100 and the light guide 1 and is formed in the illumination area 810a.

  Since the light shielding film 811 is provided, the illumination region 810a of the light guide 801 is limited to an inner region that does not overlap the light shielding film 811 (region overlapping the opening 830a of the support layer 830 in plan view). Therefore, since the illumination region 810a is located at a position away from the opposed peripheral edge portion 820d that faces the light incident portion 820c, for example, when the attached portion is an edge of an electronic device or the like, to the immediate vicinity of this edge I was unable to illuminate.

  On the other hand, in the illumination display device 800 of the comparative example, when the light shielding film 811 is not provided, the illumination display device 100 and the illumination pattern 21 of the light guide 1 are continuously formed up to the opposing peripheral edge portion 820d. Is done. In this case, a part of the light reflected in the light guide sheet 820 by the opposing side peripheral edge portion 820d is emitted in the vicinity of the opposing side peripheral edge portion 820d. For this reason, the area | region which shines relatively brightly along the opposition side peripheral part 820d is produced. Note that if the reflection at the opposing peripheral edge portion 820d is reduced (that is, if the light transmission loss is increased), the illumination unevenness can be reduced, but the illumination intensity of the illumination region 810a is reduced. Furthermore, since the reflection of the light propagated in the light guide sheet 820 is different between the region where the support layer 830 is arranged in a plan view and the region inside thereof, along the plane position corresponding to the edge of the opening 830a, Brightness may vary in a streak pattern.

  In the configuration of the illumination display device 100 and the light guide 1 of the present embodiment, the luminance of the second illumination region 10c along the opposing peripheral edge portion 20d facing the light incident portion 20c is adjusted as follows. Thereby, the difference in luminance between the first illumination region 10b and the second illumination region 10c is adjusted, and the first illumination region 10b and the second illumination region 10c can be used as the illumination region 10a without concealing the vicinity of the opposing peripheral edge portion 20d.

  Specifically, the support layer 30 is disposed along at least the opposing-side peripheral edge portion 20d, and overlaps the second illumination region 10c of the illumination region 10a in plan view. The plurality of correction patterns 23 provided in the second illumination region 10c are formed in a shape smaller than that of the largest illumination pattern 21 located in the vicinity of the second illumination region 10c. Since the efficiency of light emission varies depending on the shape of the correction pattern 23, the amount of light emitted (brightness) is adjusted according to the size. Further, the correction pattern 23 has a shape that gradually decreases in the vicinity of the boundary between the second illumination region 10c and the first illumination region 10b from the first illumination region 10b side toward the opposing peripheral edge portion 20d. As a result, the amount of light (brightness) emitted from the second illumination region 10c is adjusted to be the same as that of the first illumination region 10b, and the boundary along the edge of the opening 30a is close to the same brightness as the surroundings. Thus, the boundary between the first illumination region 10b and the second illumination region 10c becomes inconspicuous.

  The color of the support layer 30 may be changed according to the color tone that illuminates the illumination area 10a. In addition, when the width of the support layer 30 (the interval between the opposing peripheral edge 20d and the edge of the opening 30a) is wide, the correction pattern 23 is near the boundary between the second illumination region 10c and the first illumination region 10b. After decreasing from the first illumination region 10b side toward the opposing side peripheral edge portion 20d side, it was optimized by setting the size to be substantially constant on the opposing side peripheral edge portion 20d side. Furthermore, when the width of the support layer 30 is wider, it is optimal to make the correction pattern 23 a substantially constant size on the opposing peripheral edge 20d side and then slightly increase it in the vicinity of the opposing peripheral edge 20d.

  As described above, the plurality of correction patterns 23 provided in the second illumination region 10c have a function of adjusting a difference from the luminance of the first illumination region 10b. In other words, the second illumination region 10c includes a luminance correction unit 22 that adjusts a difference from the luminance of the first illumination region 10b.

  As described above, the brightness correction unit 22 is not limited to the plurality of correction patterns 23 provided in a shape similar to the illumination pattern 21, and may be provided in a shape different from the illumination pattern 21.

  Hereinafter, the effect by having made the illumination display apparatus 100 and the light guide 1 of 1st Embodiment is demonstrated.

  The light guide 1 according to the first embodiment is capable of transmitting light from the light source 60 and leaks to the other surface 20b side of the light guide sheet 20 formed in a sheet shape in which the one surface 20a side becomes the illumination region 10a. And a reflective layer 40 that reflects light. The illumination region 10a can be illuminated by the propagation of light that enters from the light incident portion 20c provided on the side surface of the light guide sheet 20. When viewed in plan from the one surface 20a side, the illumination region 10a faces the first illumination region 10b including a plurality of illumination patterns 21 for emitting light propagating through the light guide sheet 20, and the light incident portion 20c. A second illumination region 10c located in a band shape along the opposite peripheral edge 20d, and the second illumination region 10c includes a luminance correction unit 22 that adjusts a difference from the luminance of the first illumination region 10b.

  According to this configuration, the second illumination region 10 c located in a strip shape along the opposing peripheral edge portion 20 d facing the light incident portion 20 c of the light guide sheet 20 includes the luminance correction portion 22. The difference in luminance between the first illumination region 10b and the second illumination region 10c is adjusted. Thereby, the light guide sheet 20 can be used as the illumination region 10a without concealing the vicinity of the opposing side peripheral edge portion 20d facing the light incident portion 20c. By setting the illumination region 10a to the vicinity of the opposing peripheral edge portion 20d facing the light incident portion 20c of the light guide sheet 20, the space efficiency is good and the size can be reduced.

  The illumination pattern 21 of the first illumination region 10b has a shape that gradually increases from the light incident portion 20c side to the second illumination region 10c side, and the luminance correction unit 22 of the second illumination region 10c includes the illumination pattern. It consists of a plurality of correction patterns 23 provided in a shape similar to 21. The correction pattern 23 has a shape smaller than that of the largest shape of the illumination pattern 21 located in the vicinity of the second illumination region 10c.

  According to this configuration, since the luminance correction unit 22 is a correction pattern 23 having a similar shape smaller than the shape of the illumination pattern 21 in the first illumination region 10b, the light emitted from the second illumination region 10c is reduced. It can be adjusted so that the brightness of the illumination region 10c does not become too strong. Moreover, since the brightness correction | amendment part 22 can be collectively formed with the illumination pattern 21 of the 1st illumination area | region 10b, the 2nd illumination area | region 10c can be provided easily.

  Further, the correction pattern 23 has a shape that gradually decreases from the first illumination region 10b side toward the opposing peripheral edge 20d side in the vicinity of the boundary between the second illumination region 10c and the first illumination region 10b.

  According to this configuration, since the shape of the correction pattern 23 is gradually changed, the boundary between the first illumination area 10b and the second illumination area 10c is hardly visually recognized.

  Moreover, the illumination pattern 21 is arrange | positioned at the one surface 20a side of the light guide sheet 20, and has a concave shape recessed toward the other surface 20b side.

  According to this configuration, the light propagating through the light guide sheet 20 can be efficiently emitted. Moreover, the light guide sheet 20 can be easily formed.

  Further, the light guide 1 of the present embodiment has a support layer 30 for fixing the light guide sheet 20 on the other surface 20b side of the light guide sheet 20, and the support layer 30 is at least on the opposite side peripheral edge portion 20d. And the second illumination region 10c overlaps with the second illumination region 10c in plan view.

  According to this configuration, since the second illumination region 10c is provided so as to overlap with the support layer 30 that is one of the causes of non-uniform luminance in plan view, the support layer 30 is provided along the opposing side peripheral edge portion 20d. The luminance correction unit 22 can adjust the difference from the luminance of the first illumination region 10b due to the arrangement of the first illumination region 10b.

  In the light guide 1 of the first embodiment, the support layer 30 may be colored according to the color tone that illuminates the illumination region 10a.

  According to this configuration, by changing the color of the support layer 30 in accordance with the color of the light to be emitted, the difference in color tone from the first illumination region 10b can be reduced.

  The light guide 1 according to the first embodiment is characterized in that the reflective layer 40 is a reflective sheet 41 fixed to the light guide sheet 20 via the support layer 30.

  According to this configuration, the brightness can be increased by using the reflection sheet 41. Further, by changing the color of the reflection sheet 41, it can be used for adjusting the color tone.

  The illuminated display device 100 according to the first embodiment includes the light guide 1 and a light source 60 arranged so that light can enter the light incident portion 20c.

  According to this configuration, the light guide 1 that adjusts the difference in luminance between the first illumination region 10b and the second illumination region 10c along the opposing side peripheral portion 20d and uses the illumination region 10a up to the opposing side peripheral portion 20d is used. Thus, space efficiency is good and the size can be reduced.

[Second Embodiment]
FIG. 5 is an external view showing an illumination display device 200 and a light guide 2 according to the second embodiment of the present invention, FIG. 5 (a) is a plan view, and FIG. 5 (b) is a front view. FIG. 6 is an exploded perspective view showing the illumination display device 200 and the light guide 2.

  The illumination display device 200 and the light guide 2 of the second embodiment are different from the illumination display device 100 and the light guide 1 of the first embodiment in that the reflection sheet 41 is not disposed. Other members are the same as those of the illumination display device 100 and the light guide 1 of the first embodiment, and the description thereof is omitted by using the same reference numerals.

  In the light guide 2 of the present embodiment, the surface of the base 70 is used as the reflective layer 40 that reflects light leaking to the other surface 20b side of the light guide sheet 20. In addition, it is preferable that the base 70 is provided with the resist layer for protection. This resist layer may be used as the reflective layer 40, or a white material having a high reflectance may be laminated on the resist layer to form the reflective layer 40.

  In the illuminated display device 200 and the light guide 2 of the present embodiment, the light incident portion 20c is provided on the side surface on the X1 side of the light guide sheet 20, and the light entering from the light incident portion 20c facing the light source 60 is on one side 20a. Further, the illumination region 10a can be illuminated by propagating through the light guide sheet 20 while being reflected by the other surface 20b. Here, the illumination region 10a is located between the second illumination region 10c located in a strip shape along the opposing peripheral edge 20d facing the light entrance 20c, and from the boundary position of the second illumination region 10c to the light entrance 20c side. And the first illumination region 10b. In the illumination region 10a, a plurality of illumination patterns 21 and a plurality of correction patterns 23 are formed so as to partition the first illumination region 10b and the second illumination region 10c. The correction pattern 23 is provided in a shape similar to the illumination pattern 21.

  The illuminated display device 200 and the light guide 2 of the second embodiment are different from the illuminated display device 100 and the light guide 1 of the first embodiment in the characteristics of the reflective layer 40. By changing the size of the correction pattern 23 in accordance with the characteristics of the reflective layer 40, the brightness of the second illumination region 10c along the opposing peripheral edge portion 20d facing the light incident portion 20c is adjusted. Thereby, the difference in luminance between the first illumination region 10b and the second illumination region 10c is adjusted, and the first illumination region 10b and the second illumination region 10c can be used as the illumination region 10a without concealing the vicinity of the opposing peripheral edge portion 20d. The plurality of correction patterns 23 provided in the second illumination region 10c have a function of adjusting a difference from the luminance of the first illumination region 10b. In other words, the second illumination region 10c includes a luminance correction unit 22 that adjusts a difference from the luminance of the first illumination region 10b. As described above, the brightness correction unit 22 is not limited to the plurality of correction patterns 23 provided in a shape similar to the illumination pattern 21, and may be provided in a shape different from the illumination pattern 21.

  Hereinafter, the effect by having made the illumination display apparatus 200 and the light guide 2 of 2nd Embodiment is demonstrated.

  The light guide 2 according to the second embodiment leaks to the light guide sheet 20 formed in a sheet shape that can transmit light from the light source 60 and the one surface 20a side becomes the illumination region 10a, and the other surface 20b side of the light guide sheet 20. And a reflective layer 40 that reflects light. The illumination region 10a can be illuminated by the propagation of light that enters from the light incident portion 20c provided on the side surface of the light guide sheet 20. When viewed in plan from the one surface 20a side, the illumination region 10a faces the first illumination region 10b including a plurality of illumination patterns 21 for emitting light propagating through the light guide sheet 20, and the light incident portion 20c. A second illumination region 10c located in a band shape along the opposite peripheral edge 20d, and the second illumination region 10c includes a luminance correction unit 22 that adjusts a difference from the luminance of the first illumination region 10b.

  According to this configuration, the second illumination region 10 c located in a strip shape along the opposing peripheral edge portion 20 d facing the light incident portion 20 c of the light guide sheet 20 includes the luminance correction portion 22. The difference in luminance between the first illumination region 10b and the second illumination region 10c is adjusted. Thereby, the light guide sheet 20 can be used as the illumination region 10a without concealing the vicinity of the opposing side peripheral edge portion 20d facing the light incident portion 20c. By setting the illumination region 10a to the vicinity of the opposing peripheral edge portion 20d facing the light incident portion 20c of the light guide sheet 20, the space efficiency is good and the size can be reduced.

  The illumination pattern 21 of the first illumination region 10b has a shape that gradually increases from the light incident portion 20c side to the second illumination region 10c side, and the luminance correction unit 22 of the second illumination region 10c includes the illumination pattern. It consists of a plurality of correction patterns 23 provided in a shape similar to 21. The correction pattern 23 has a shape smaller than that of the largest shape of the illumination pattern 21 located in the vicinity of the second illumination region 10c.

  According to this configuration, since the luminance correction unit 22 is a correction pattern 23 having a similar shape smaller than the shape of the illumination pattern 21 in the first illumination region 10b, the light emitted from the second illumination region 10c is reduced. It can be adjusted so that the brightness of the illumination region 10c does not become too strong. Moreover, since the brightness correction | amendment part 22 can be collectively formed with the illumination pattern 21 of the 1st illumination area | region 10b, the 2nd illumination area | region 10c can be provided easily.

  Further, the correction pattern 23 has a shape that gradually decreases from the first illumination region 10b side toward the opposing peripheral edge 20d side in the vicinity of the boundary between the second illumination region 10c and the first illumination region 10b.

  According to this configuration, since the shape of the correction pattern 23 is gradually changed, the boundary between the first illumination area 10b and the second illumination area 10c is hardly visually recognized.

  Moreover, the illumination pattern 21 is arrange | positioned at the one surface 20a side of the light guide sheet 20, and has a concave shape recessed toward the other surface 20b side.

  According to this configuration, the light propagating through the light guide sheet 20 can be efficiently emitted. Moreover, the light guide sheet 20 can be easily formed.

  Moreover, the light guide 2 of 2nd Embodiment has the support layer 30 for fixing the light guide sheet 20 to the other surface 20b side of the light guide sheet 20, and the support layer 30 is at least the opposing side peripheral part 20d. And is overlapped with the second illumination region 10c in plan view.

  According to this configuration, since the second illumination region 10c is provided so as to overlap with the support layer 30 that is one of the causes of non-uniform luminance in plan view, the support layer 30 is provided along the opposing side peripheral edge portion 20d. The luminance correction unit 22 can adjust the difference from the luminance of the first illumination region 10b due to the arrangement of the first illumination region 10b.

  Moreover, the light guide 2 of 2nd Embodiment may be colored according to the color tone which the support layer 30 illuminates the illumination area | region 10a.

  According to this configuration, by changing the color of the support layer 30 in accordance with the color of the light to be emitted, the difference in color tone from the first illumination region 10b can be reduced.

  The illuminated display device 100 according to the second embodiment includes the light guide 2 and a light source 60 arranged so that light can enter the light incident portion 20c.

  According to this configuration, the light guide 2 that adjusts the difference in luminance between the first illumination region 10b and the second illumination region 10c along the opposing side peripheral portion 20d and uses the illumination region 10a up to the opposing side peripheral portion 20d is used. Thus, space efficiency is good and the size can be reduced.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, the present invention can be modified as follows, and these also belong to the technical scope of the present invention.

  (1) In the present embodiment, the support layer 30 is a double-sided adhesive tape, but it may be a paste applied by printing or the like.

  (2) In the present embodiment, the illumination pattern 21 has a concave shape that is recessed toward the other surface 20b and is provided in the first illumination region 10b of the illumination region 10a. However, the illumination pattern 21 is not limited to the concave shape. Instead, it may have a convex shape. Similarly, the brightness correction unit 22 is not limited to a concave shape, and may have a convex shape.

  (3) In this embodiment, although the several illumination pattern 21 was arrange | positioned at the one surface 20a side of the light guide sheet 20, you may change so that it may be arrange | positioned at the other surface 20b side.

DESCRIPTION OF SYMBOLS 1 Light guide 2 Light guide 10a Illumination area 10b 1st illumination area 10c 2nd illumination area 20 Light guide sheet 20a One side 20b Other side 20c Light incident part 20d Opposite side peripheral part 21 Illumination pattern 22 Brightness correction part 23 Correction pattern 30 Support layer 30a opening 40 reflecting layer 41 reflecting sheet 60 light source 61 light emitting unit 70 base 100 illuminated display device 200 illuminated display device

Claims (8)

A light guide sheet that is formed in a sheet shape that can transmit light from the light source and has one side as an illumination region;
A reflective layer that reflects light leaking to the other surface side of the light guide sheet,
A light guide capable of illuminating the illumination region by propagation of light entering from a light incident portion provided on a side surface of the light guide sheet;
When viewed in plan from the one surface side, the illumination area includes a first illumination area having a plurality of illumination patterns that emit light that has propagated through the light guide sheet, and an opposed peripheral edge that faces the light incident part. A second illumination region located in a band shape along
The light guide according to claim 1, wherein the second illumination area includes a brightness correction unit that adjusts a difference from the brightness of the first illumination area. The illumination pattern of the first illumination region has a shape that gradually increases from the light incident part side toward the second illumination region side,
The brightness correction unit of the second illumination area is composed of a plurality of correction patterns provided in a shape similar to the illumination pattern,
The light guide according to claim 1, wherein the correction pattern has a shape smaller than that of the largest illumination pattern located in the vicinity of the second illumination region.   The correction pattern has a shape that gradually decreases from the first illumination region side toward the opposed peripheral edge side in the vicinity of the boundary between the second illumination region and the first illumination region. The light guide according to claim 2.   4. The light guide according to claim 1, wherein the illumination pattern has a concave shape that is disposed on the one surface side of the light guide sheet and is recessed toward the other surface side. 5. . On the other surface side of the light guide sheet, there is a support layer for fixing the light guide sheet,
5. The light guide according to claim 4, wherein the support layer is disposed along at least the opposing peripheral edge and overlaps the second illumination region in plan view.   The light guide according to claim 5, wherein the support layer is colored according to a color tone that illuminates the illumination region.   The light guide according to claim 5, wherein the reflective layer is a reflective sheet fixed to the light guide sheet via the support layer. The light guide according to any one of claims 1 to 7,
And a light source arranged so that light can be incident on the light incident portion.