Indication device

Abstract

To further improve a display device.SOLUTION: In a display device 10, a display panel 12 displays an image. A cover 16 has: a first surface 16a, which is located closer to an observer side than the display panel 12, has light transparency, and is located on the observer side; and a second surface 16b, which is located on an opposite side to the first surface 16a. A decorative layer 18 covers at least one of the first surface 16a and the second surface 16b. An illuminance sensor 22 is located on the second surface 16b side with respect to the cover 16, and detects illuminance of incident light. A light guide body 26 has a first incident end 32 that is an end secured to the cover 16, and guides light incident on the first incident end 32 to the illuminance sensor 22.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a display device. [Background technology]

[0002] A display device that controls display brightness according to the output of an illuminance sensor is known (see, for example, Patent Document 1). This display device has an illuminance sensor disposed at a position recessed from the front surface of a display panel, and a light-guiding member disposed between the illuminance sensor and the front surface of the display panel, which guides external light to the illuminance sensor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-109701 Summary of the Invention [Problem to be solved by the invention]

[0004] Further improvements are desired in display devices. [Means for solving the problem]

[0005] In order to solve the above problems, a display device according to one embodiment of the present disclosure includes a display panel that displays an image, a cover that is located closer to the viewer than the display panel, is translucent, and has a first surface that is located closer to the viewer, and a second surface that is located opposite the first surface, a decorative layer that covers at least one of the first surface and the second surface, an illuminance sensor that is located on the second surface side of the cover and detects the illuminance of incident light, and a light guide that has a first incident end that is an end fixed to the cover and that guides light that has entered the first incident end to the illuminance sensor. [Effects of the Invention]

[0006] The above-described embodiment allows further improvement. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a top view schematically showing a vehicle on which a display device according to a first embodiment is mounted. [Figure 2] 1 is a schematic cross-sectional view of a display device according to a first embodiment. [Figure 3] FIG. 10 is a schematic cross-sectional view of a display device according to a second embodiment. [Figure 4] FIG. 10 is a schematic cross-sectional view of a display device according to a third embodiment. [Figure 5] FIG. 10 is a schematic cross-sectional view of a display device according to a modified example of the first embodiment. [Figure 6] FIG. 10 is a schematic cross-sectional view of a display device according to a modified example of the second embodiment. [Figure 7] FIG. 11 is a schematic cross-sectional view of a display device according to a modified example of the third embodiment. [Figure 8] FIG. 10 is a schematic cross-sectional view of a display device according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] (Findings that formed the basis of this disclosure) Before describing the embodiments in detail, the underlying knowledge will be explained. In order to more accurately detect the illuminance of light incident on a display device and control the brightness of the display device according to the detected illuminance, there is a demand for providing a light guide that guides light to an illuminance sensor near the display area of ​​the display device.

[0009] The present inventors have discovered the following problem in display devices in which a cover and a decorative layer are arranged on the viewer side of the display panel and the pattern of the decorative layer is visible in the display area and its surroundings: In response to the above demand, if a light guide is arranged to penetrate the cover and the decorative layer, no decorative layer is provided in the area where the light guide is located, which may impair the design and cause a sense of discomfort to the user.

[0010] On the other hand, if the light guide is positioned closer to the interior of the display device than the cover and air is present between the light guide and the cover, light is reflected at both the interface between the cover and the air and the interface between the air and the light guide. This reduces the amount of light reaching the illuminance sensor, which can lead to inaccurate detection of the illuminance of light entering the display device and making it difficult to properly control the brightness of the display device. Furthermore, the reflected light can cause the light guide to be visible through the decorative layer, which can impair the design and cause discomfort to the user. To solve these problems, the display device according to the present disclosure is configured as follows.

[0011] Hereinafter, identical or equivalent components, parts, and steps shown in each drawing will be denoted by the same reference numerals, and duplicated explanations will be omitted where appropriate. In addition, the dimensions of the parts in each drawing are enlarged or reduced as appropriate for ease of understanding.

[0012] (First embodiment) 1 is a top view schematically showing a vehicle 1 equipped with a display device 10 according to a first embodiment. While the display device 10 is described as an example of an in-vehicle display device, its use is not particularly limited, and it may be, for example, a display device for a portable electronic device or a display device for a stationary electronic device.

[0013] The display device 10 is installed, for example, near the center of the center console inside the vehicle. The display device 10 displays various information. External light L1, which is sunlight, enters the display surface of the display device 10 through the right rear window of the vehicle 1, and the external light L1 may be specularly reflected from the display surface and directed toward the eyes of the driver 2 in the left seat. In this case, the driver 2 may have difficulty viewing the content displayed on the display device 10. Therefore, the display device 10 detects the illuminance near the display surface, and increases the screen brightness as the detected illuminance increases. This improves the visibility of the display device 10 when the illuminance of incident light is high.

[0014] 2 is a schematic cross-sectional view of a display device 10 according to a first embodiment. The display device 10 includes a display panel 12, a touch panel 14, a cover 16, a decorative layer 18, a surface layer 20, an illuminance sensor 22, a sensor substrate 24, a light guide 26, and an adhesive layer 28.

[0015] The display panel 12 displays an image. The display brightness of the display panel 12 is controllable. Although not shown, the display panel 12 includes, for example, a liquid crystal panel and a backlight that illuminates the liquid crystal panel. The display panel 12 may be a self-luminous panel such as an organic EL panel. The touch panel 14 is located closer to the front of the display panel 12, i.e., closer to the viewer, and detects touches made by the user on the screen of the display device 10. The touch panel 14 is translucent.

[0016] The cover 16 is located closer to the viewer than the display panel 12 and the touch panel 14. The cover 16 is translucent. The cover 16 has a first surface 16a located on the viewer side and a second surface 16b located on the opposite side to the first surface 16a. The first surface 16a is also referred to as the surface. The decorative layer 18 covers the first surface 16a of the cover 16. The decorative layer 18 has a pattern, such as a wood grain pattern, and is translucent. The decorative layer 18 may be a decorative sheet with a pattern, or may be a layer formed by printing or transferring ink onto the cover 16. The surface layer 20 covers the viewer-side surface of the decorative layer 18. The surface layer 20 is translucent. The surface layer 20 has irregularities formed, for example, by a matte finish, and also has the function of diffusing light.

[0017] The image displayed on the display panel 12 is visible from the observer's side of the surface layer 20. The pattern of the decorative layer 18 is also visible from the observer's side, and in the area overlapping the display panel 12, the pattern can be seen superimposed on the displayed image. Furthermore, the light diffusion function of the surface layer 20 can also express the texture of wood grain, etc. These features can improve the design of the display device 10. For example, by using a decorative layer 18 with a pattern that matches the interior of the vehicle 1, the display screen of the display device 10 can be made to blend into the interior of the vehicle 1.

[0018] The light guide 26 and the illuminance sensor 22 are located on the second surface 16b side of the cover 16. The light guide 26 extends from the second surface 16b of the cover 16. The light guide 26 has a columnar portion 30. In this embodiment, the light guide 26 is composed only of the columnar portion 30. The columnar portion 30 may have a cylindrical shape or a prismatic shape. The extending direction d1 of the columnar portion 30 is parallel to the normal direction nd of the surface of the cover 16.

[0019] The columnar section 30 has a first incident end portion 32, which is an end portion, an incident surface 34, and an exit surface 36. The first incident end portion 32 is fixed to the second surface 16b of the cover 16 by an adhesive layer 28. The adhesive layer 28 is light-transmitting. The adhesive layer 28 bonds the first incident end portion 32 to the cover 16. It can also be said that the incident surface 34 is joined to the second surface 16b of the cover 16 by the adhesive layer 28. The adhesive layer 28 is, for example, a layer in which a light-transmitting adhesive is hardened. As the adhesive, for example, a known adhesive such as an optical pressure-sensitive adhesive or a liquid transparent resin can be used.

[0020] The term "adhesion" also includes "welding." For example, the cover 16 and the light guide 26 can be welded together using a welding agent or heat. The adhesive layer 28 is a layer formed by hardening a portion of the melted cover 16 and a portion of the melted light guide 26.

[0021] The light guide 26 guides light that has passed through the surface layer 20, the decorative layer 18, the cover 16, and the adhesive layer 28 and is incident on the incident surface 34 of the first incident end 32 to the illuminance sensor 22. The exit surface 36 emits light toward the illuminance sensor 22. The exit surface 36 is parallel to the surface of the cover 16.

[0022] The light receiving surface of the illuminance sensor 22 is fixed to the emission surface 36. The illuminance sensor 22 receives light emitted from the emission surface 36 of the light guide 26 on the light receiving surface, and detects the illuminance of the light incident on the light receiving surface.

[0023] When viewed from the viewer's side, the light guide 26 and the illuminance sensor 22 are disposed next to the display panel 12. This allows the illuminance sensor 22 to detect an illuminance close to the illuminance of external light incident on the display panel 12.

[0024] The sensor board 24 supports the illuminance sensor 22. The sensor board 24 also has circuit elements mounted thereon that process the output signal of the illuminance sensor 22. The case 38 covers the periphery of the light guide 26 and houses the light guide 26. Note that, although the adhesive layer 28 adheres only the light guide 26 to the cover 16 in FIG. 2 , the adhesive layer 28 may also adhere the case 38 to the cover 16. Alternatively, the case 38 may be fitted into the cover 16. Alternatively, the case 38 may be adhered to the cover 16 with a member other than the adhesive layer 28, such as double-sided tape.

[0025] The cover 16 and the light guide 26 may be formed of the same material or different materials. The material of the cover 16 may be, for example, polycarbonate, and the material of the light guide 26 may be, for example, acrylic. The refractive index of the cover 16 and the refractive index of the light guide 26 are preferably close to each other, and the refractive index of the adhesive layer 28 is preferably close to each other. This is because the reflectance at the interface between the cover 16 and the adhesive layer 28 and the interface between the adhesive layer 28 and the light guide 26 can be reduced. By forming the cover 16 and the light guide 26 from the same material, reflected light at the first incident end 32 of the light guide 26 can be further reduced.

[0026] For example, the display panel 12 reduces the screen brightness as the illuminance detected by the illuminance sensor 22 decreases, and increases the screen brightness as the detected illuminance increases.

[0027] According to the embodiment, the first incident end 32 of the light guide 26 is fixed to the cover 16 by the adhesive layer 28, so there is no interface between the cover 16 and the air or between the air and the light guide 26 between the cover 16 and the light guide 26. This makes it difficult for light that has passed through the cover 16 to be reflected at the first incident end 32, making it difficult for the amount of light guided to the illuminance sensor 22 to decrease. This allows the illuminance sensor 22 to more accurately detect the illuminance of light incident on the display device 10. This allows the display device 10 to, for example, appropriately control the brightness of the screen.

[0028] Furthermore, since the light transmitted through the cover 16 is less likely to be reflected at the first incident end 32, the light guide 26 is less likely to be visible to the observer through the decorative layer 18. This makes it less likely that the presence of the light guide 26 will give the observer an uncomfortable feeling.

[0029] Furthermore, the extending direction d1 of the columnar portion 30 is parallel to the normal direction nd of the surface of the cover 16, so that light incident parallel to the normal direction nd can be detected with high accuracy. The presence of the adhesive layer 28 makes it possible to easily eliminate the interface between the cover 16 and the air and the interface between the light guide 26 and the air, even if the light guide 26 is a separate component from the cover 16.

[0030] (Second embodiment) The second embodiment differs from the first embodiment in the extending direction of the light guide 26. The following description will focus on the differences from the first embodiment.

[0031] 3 is a schematic cross-sectional view of a display device 10 according to a second embodiment. The extending direction d1 of the columnar portion 30 intersects with the normal direction nd of the surface of the cover 16. The direction d1 is set to be along the incident direction of external light to be detected. For example, in the case of the display device 10 mounted on the vehicle 1 of FIG. 1, the direction d1 is set to be along the incident direction of external light L1.

[0032] This makes it possible to more accurately detect the illuminance of external light L1 incident on the display device 10 from a direction d1 intersecting with the normal direction nd to the surface of the cover 16. This makes it possible to more appropriately control the luminance of the display panel 12 in response to the external light L1.

[0033] In addition, in Figure 1, external light L2 that enters the display surface of the display device 10 from the left rear window of the vehicle 1 does not head toward the driver 2 even if it is specularly reflected, so here, the configuration is such that the accuracy of detecting illuminance is improved relative to external light L1.

[0034] 3, the light exit surface 36 and the sensor substrate 24 are not parallel to the surface of the cover 16. The light guide 26 extends in one direction and is not curved, which reduces the loss of light in the light guide 26 compared to when the light guide 26 is curved. This makes it easier to detect the illuminance of incident light more accurately.

[0035] (Third embodiment) The third embodiment differs from the second embodiment in that the light guide 26 is bent. The following description will focus on the differences from the second embodiment.

[0036] FIG. 4 is a schematic cross-sectional view of a display device 10 according to a third embodiment. The light guide 26 has a first columnar section 30a having an incident surface 34 and a first incident end 32, and a second columnar section 30b having an exit surface 36. The second columnar section 30b is connected to the first columnar section 30a. In other words, the first columnar section 30a and the second columnar section 30b are integrally formed. The extension direction d1 of the first columnar section 30a is the same as in the second embodiment. The extension direction d3 of the second columnar section 30b is parallel to the normal direction nd.

[0037] The light-emitting surface 36 is parallel to the surface of the cover 16. Therefore, the light-receiving surface of the illuminance sensor 22 and the sensor substrate 24 are also parallel to the surface of the cover 16. This makes it possible to make the thickness of the display device 10 smaller than in the second embodiment. This makes it easier to assemble the display device 10.

[0038] (Modifications of the first to third embodiments) In each of the first to third embodiments, the light guide 26 and the cover 16 may be integrally formed. The following description will focus on the differences from each of the first to third embodiments.

[0039] Fig. 5 is a schematic cross-sectional view of a display device 10 according to a modification of the first embodiment. The display device 10 shown in Fig. 5 differs from the display device 10 shown in Fig. 2 in that the light guide 26 and the cover 16 are integrally formed.

[0040] Fig. 6 is a schematic cross-sectional view of a display device 10 according to a modification of the second embodiment. The display device 10 shown in Fig. 6 differs from the display device 10 shown in Fig. 3 in that the light guide 26 and the cover 16 are integrally formed.

[0041] Fig. 7 is a schematic cross-sectional view of a display device 10 according to a modification of the third embodiment. The display device 10 shown in Fig. 7 differs from the display device 10 shown in Fig. 4 in that the light guide 26 and the cover 16 are integrally formed.

[0042] In these configuration examples, the cover 16 with the light guide 26 can be manufactured by, for example, resin molding. The light guide 26 extends from the second surface 16b of the cover 16, and the first incident end 32 of the light guide 26 is fixed to the second surface 16b of the cover 16. According to these configuration examples, there is no interface with a refractive index difference between the cover 16 and the light guide 26, so reflection of external light can be further suppressed. Furthermore, the number of parts can be reduced, allowing the display device 10 to be manufactured at lower cost. Furthermore, assembly of the display device 10 becomes easier.

[0043] (Fourth embodiment) The fourth embodiment differs from the third embodiment in that the light guide 26 has two incident ends. The following description will focus on the differences from the third embodiment.

[0044] FIG. 8 is a schematic cross-sectional view of a display device 10 according to a fourth embodiment. The light guide 26 extends from the second surface 16b of the cover 16. The light guide 26 includes a first columnar section 40a, a second columnar section 40b, and a third columnar section 40c. The first columnar section 40a includes a first incident end section 32a that is fixed to the cover 16. The second columnar section 40b includes a second incident end section 32b that is fixed to the cover 16. The direction d1 in which the first columnar section 40a extends intersects with the direction d2 in which the second columnar section 40b extends. The directions d1 and d2 each intersect with the normal direction nd to the surface of the cover 16. The directions d1 and d2 are each set to align with the incident direction of external light to be detected. For example, in the case of the display device 10 mounted on the vehicle 1 of FIG. 1, the direction d1 is determined to be along the incident direction of external light L1, and the direction d2 is determined to be along the incident direction of external light L2.

[0045] The first columnar section 40a and the second columnar section 40b are connected to the third columnar section 40c. The first columnar section 40a and the second columnar section 40b are connected to each other at the portion where they connect to the third columnar section 40c. The direction d3 in which the third columnar section 40c extends is parallel to the normal direction nd. The third columnar section 40c guides the light guided to the first columnar section 40a and the second columnar section 40b to the illuminance sensor 22. The exit surface 36 emits light toward the illuminance sensor 22. The cover 16, the first columnar section 40a, the second columnar section 40b, and the third columnar section 40c are integrally formed by resin molding.

[0046] This configuration not only enables the illuminance of external light L1 to be detected with high accuracy, but also enables the illuminance of external light L2 to be detected with higher accuracy than in the third embodiment. Therefore, the luminance of the display panel 12 can be more appropriately controlled for external light L2 as well as external light L1.

[0047] Depending on the incident direction of external light to be detected, either direction d1 or direction d2 may be parallel to the normal direction nd of the surface of cover 16. As in the first to third embodiments, cover 16 and light guide 26 may be configured as separate components, and first incident end 32a and second incident end 32b of light guide 26 may be adhered to cover 16 by adhesive layer 28, respectively.

[0048] The present disclosure has been described above based on the embodiments. These embodiments are merely examples, and it will be understood by those skilled in the art that various modifications are possible in the combination of each component or each treatment process, and that such modifications are also within the scope of the present disclosure.

[0049] For example, in each of the first to third embodiments, the decorative layer 18 may cover the second surface 16b of the cover 16 instead of the first surface 16a. In this modification, the surface layer 20 covers the first surface 16a of the cover 16. The first incident end 32 is fixed to the back surface of the decorative layer 18 by the adhesive layer 28. That is, the first incident end 32 is fixed to the cover 16 via the adhesive layer 28 and the decorative layer 18. This configuration also corresponds to the first incident end 32 being fixed to the cover 16. Furthermore, in the fourth embodiment, the cover 16 and the light guide 26 may be configured as separate components, and the decorative layer 18 may cover the second surface 16b of the cover 16 instead of the first surface 16a. In this modification, the first incident end 32a and the second incident end 32b are each fixed to the back surface of the decorative layer 18 by the adhesive layer 28. This configuration also corresponds to the first incident end 32a and the second incident end 32b being fixed to the cover 16. In these modified examples, there is no interface between the cover 16 and the air, between the decorative layer 18 and the air, or between the air and the light guide 26, so the effects described above can be obtained. In addition, the degree of freedom in the configuration of the display device 10 can be increased.

[0050] Furthermore, in each of the first to third embodiments, the decorative layer 18 may cover both the first surface 16a and the second surface 16b of the cover 16. In this modification, the first incident end 32 is fixed to the back surface of the decorative layer 18 covering the second surface 16b by an adhesive layer 28. In the fourth embodiment, the cover 16 and the light guide 26 are configured as separate components, and the decorative layer 18 may cover both the first surface 16a and the second surface 16b of the cover 16. In this modification, the first incident end 32a and the second incident end 32b are also fixed to the back surface of the decorative layer 18 covering the second surface 16b by an adhesive layer 28. In these modifications, providing the decorative layer 18 with a pattern on both the first surface 16a and the second surface 16b allows for a three-dimensional design, thereby increasing the design freedom of the display device 10. Furthermore, by providing the decorative layer 18 on both the first surface 16a and the second surface 16b, it becomes easier to adjust the transmittance and transmitted color of the cover 16 to a desired value.

[0051] One aspect of the present disclosure is as follows. [Item 1] a display panel for displaying images; a cover that is located closer to a viewer than the display panel, has light-transmitting properties, and has a first surface that is located closer to the viewer, and a second surface that is located opposite to the first surface; a decorative layer covering at least one of the first surface and the second surface; an illuminance sensor located on the second surface side of the cover and detecting illuminance of incident light; a light guide having a first incident end portion that is an end portion fixed to the cover, and that guides light that has entered the first incident end portion to the illuminance sensor; A display device comprising: According to this aspect, since the first incident end is fixed to the cover, light transmitted through the cover is less likely to be reflected at the first incident end, making it less likely that the amount of light guided to the illuminance sensor will decrease. Therefore, the illuminance sensor can more accurately detect the illuminance of light incident on the display device. Furthermore, since light transmitted through the cover is less likely to be reflected at the first incident end, the light guide is less likely to be visible to the viewer through the decorative layer. This makes it less likely that the presence of the light guide will cause discomfort to the viewer.

[0052] [Item 2] an adhesive layer that bonds the first incident end of the light guide and the cover; Item 1. The display device according to item 1. In this case, even if the light guide, which is a separate component from the cover, is used, it is possible to easily eliminate the interface between the cover and the air and the interface between the light guide and the air.

[0053] [Item 3] The light guide is formed of the same material as the cover. Item 1 or 2. The display device according to item 1 or 2. In this case, the reflected light at the first incident end of the light guide can be further reduced.

[0054] [Item 4] The light guide is integrally formed with the cover. Item 1. The display device according to item 1. In this case, the number of parts can be reduced, the display device can be manufactured at lower cost, and the display device can be assembled more easily.

[0055] [Item 5] the light guide has a post having the first incident end, The extending direction of the columnar portion is parallel to the normal direction of the surface of the cover. Item 4. The display device according to any one of items 1 to 4. In this case, the illuminance of light incident parallel to the normal direction of the surface of the cover can be detected with high accuracy.

[0056] [Item 6] the light guide has a post having the first incident end, The extending direction of the columnar portion intersects with the normal direction of the surface of the cover. Item 4. The display device according to any one of items 1 to 4. In this case, the illuminance of light incident from a direction intersecting the normal direction of the surface of the cover can be detected with high accuracy.

[0057] [Item 7] the light guide has an exit surface that emits light toward the illuminance sensor, The exit surface is parallel to the surface of the cover. Item 5. The display device according to item 6. In this case, by arranging the light receiving surface of the illuminance sensor on the sensor substrate parallel to the light emitting surface of the light guide, the sensor substrate can be arranged parallel to the surface of the cover, thereby making it possible to further reduce the thickness of the display device.

[0058] [Item 8] The light guide is a first columnar portion having the first incident end portion; a second columnar portion having a second incident end portion fixed to the cover; a third columnar section connected to the first columnar section and the second columnar section, and guiding the light guided to the first columnar section and the second columnar section to the illuminance sensor; Equipped with The extending direction of the first columnar portion intersects with the extending direction of the second columnar portion. Item 4. The display device according to any one of items 1 to 4. In this case, the illuminance can be detected with high accuracy for both the light incident along the direction in which the first columnar section extends and the light incident along the direction in which the second columnar section extends.

[0059] [Item 9] The extending direction of the first columnar portion is parallel to the normal direction of the surface of the cover. Item 9. The display device according to item 8. In this case, the illuminance of light incident parallel to the normal direction of the surface of the cover and the illuminance of light incident from a direction intersecting the normal direction can be detected with high accuracy.

[0060] [Item 10] The extending directions of the first columnar portion and the second columnar portion intersect with the normal direction of the surface of the cover. Item 9. The display device according to item 8. In this case, the illuminance of light incident from each of two directions intersecting the normal direction of the surface of the cover can be detected with high accuracy.

[0061] [Item 11] The decorative layer covers the first surface. Item 11. The display device according to any one of items 1 to 10. [Explanation of symbols]

[0062] 10...display device, 12...display panel, 14...touch panel, 16...cover, 16a...first surface, 16b...second surface, 18...decorative layer, 20...surface layer, 22...illuminance sensor, 24...sensor substrate, 26...light guide, 28...adhesive layer, 30...columnar portion, 30a...first columnar portion, 30b...second columnar portion, 32...first incident end, 32a...first incident end, 32b...second incident end, 34...incident surface, 36...exit surface, 40a...first columnar portion, 40b...second columnar portion, 40c...third columnar portion.

Claims

1. a display panel for displaying images; a cover that is located closer to a viewer than the display panel, has light-transmitting properties, and has a first surface that is located closer to the viewer, and a second surface that is located opposite to the first surface; a decorative layer covering at least one of the first surface and the second surface; an illuminance sensor located on the second surface side of the cover and detecting illuminance of incident light; a light guide having a first incident end portion that is an end portion fixed to the cover, the light guide portion guiding the light that has entered the first incident end portion to the illuminance sensor; Equipped with The light guide is a first columnar portion having the first incident end portion; a second columnar portion having a second incident end portion fixed to the cover; a third columnar section connected to the first columnar section and the second columnar section, and guiding the light guided to the first columnar section and the second columnar section to the illuminance sensor; Equipped with The extending direction of the first columnar portion intersects with the extending direction of the second columnar portion. Display device.

2. an adhesive layer that bonds the first incident end of the light guide and the cover; The display device according to claim 1 .

3. The light guide is formed of the same material as the cover.

3. The display device according to claim 1 or 2.

4. The light guide is integrally formed with the cover. The display device according to claim 1 .

5. the light guide has a post having the first incident end; The extending direction of the columnar portion is parallel to the normal direction of the surface of the cover.

3. The display device according to claim 1 or 2.

6. the light guide has a post having the first incident end; The extending direction of the columnar portion intersects with the normal direction of the surface of the cover.

3. The display device according to claim 1 or 2.

7. the light guide has an exit surface that emits light toward the illuminance sensor, The exit surface is parallel to the surface of the cover. The display device according to claim 6.

8. The decorative layer covers the first surface.

3. The display device according to claim 1 or 2.

Images