Display device

Abstract

In a display device (10), a display panel (12) displays an image. The cover (16) is positioned closer to the observer side than the display panel (12), has light transmittance, and has a first surface (16a) positioned on the observer side, and a second surface (16b) positioned on the opposite side of the first surface (16a). The decorative layer (18) covers at least one of the first surface (16a) and the second surface (16b). The illuminance sensor (22) is located on the second surface (16b) side with respect to the cover (16) and detects the illuminance of the incident light. The light guide body (26) has a first incident end portion (32) as an end portion fixed to the cover (16), and guides light incident on the first incident end portion (32) to the illuminance sensor (22).

Description

Technical Field

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

[0002] A display device is known that controls display brightness based on output of an illuminance sensor (for example, see Patent Document 1). The display device includes: an illuminance sensor disposed inward from a front surface of a display panel; and a light guide member disposed between the illuminance sensor and the front surface of the display panel to guide external light to the illuminance sensor.

[0003] [Prior art literature]

[0004] [Patent Document]

[0005] Patent Document 1: Japanese Patent Application Publication No. 2014-109701 Summary of the invention

[0006] [Problems to be solved by the invention]

[0007] Further improvements are sought in display devices.

[0008] [Technical solutions for solving technical problems]

[0009] In order to solve the above-mentioned problems, a display device of a scheme disclosed in the present invention includes: a display panel that displays an image; a cover that is located on the observer side of the display panel and has light transmittance, and the cover has a first surface and a second surface, the first surface is located on the observer side, and the second surface is located on the opposite side of 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 relative to the cover and detects the illuminance of incident light; and a light guide that has a first incident end portion that is fixed to the cover and guides light incident on the first incident end portion to the illuminance sensor.

[0010] [Effects of the invention]

[0011] Through the above solution, further improvement can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a plan view schematically showing a vehicle on which the display device according to the first embodiment is mounted.

[0013] Figure 2 This is a schematic cross-sectional view of the display device according to the first embodiment.

[0014] Figure 3 This is a schematic cross-sectional view of a display device according to a second embodiment.

[0015] Figure 4This is a schematic cross-sectional view of a display device according to a third embodiment.

[0016] Figure 5 It is a schematic cross-sectional view of a display device according to a modified example of the first embodiment.

[0017] Figure 6 It is a schematic cross-sectional view of a display device according to a modified example of the second embodiment.

[0018] Figure 7 It is a schematic cross-sectional view of a display device according to a modified example of the third embodiment.

[0019] Figure 8 This is a schematic cross-sectional view of a display device according to a fourth embodiment. DETAILED DESCRIPTION

[0020] (Knowledge that forms the basis of this disclosure)

[0021] Before describing the implementation method in detail, the basic knowledge is described. 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 desire to provide a light guide that guides light to an illuminance sensor near a display area of ​​the display device.

[0022] The inventors have found the following problem with respect to a display device in which a cover and a decorative layer are arranged on the observer side of a display panel and the pattern of the decorative layer can be visually recognized in the display area and its surroundings. According to the above expectation, when a light guide is arranged in a manner that penetrates the cover and the decorative layer, the decorative layer is not provided in the portion where the light guide is located, so there is the possibility that the design is impaired, giving the user a sense of disharmony.

[0023] On the other hand, when the light guide is arranged on the inner side of the display device closer to the cover, and there is air between the light guide and the cover, the light will be reflected at the interface between the cover and the air and at the interface between the air and the light guide. Therefore, the light reaching the illuminance sensor will be reduced, and the illuminance of the light incident on the display device will not be accurately detected, and there is a possibility that the brightness of the display device will not be easy to properly control. In addition, due to the reflected light, the light guide can be seen through the decorative layer, and there is a possibility that the design will be damaged, which may give the user a sense of disharmony. In order to solve these problems, the display device disclosed in the present invention is constructed as follows.

[0024] Hereinafter, the same or equivalent components, members, and processes shown in the drawings are denoted by the same reference numerals, and repeated descriptions are appropriately omitted. In addition, the sizes of the members in the drawings are appropriately enlarged or reduced for easy understanding.

[0025] (First embodiment)

[0026] Figure 1 1 is a top view schematically showing a vehicle 1 equipped with a display device 10 according to the first embodiment. The display device 10 is described as an example of a vehicle-mounted display device, but the application is not particularly limited, and for example, it may be a display device of a portable electronic device or a display device of a fixed electronic device.

[0027] The display device 10 is, for example, disposed near the center of the center console in the vehicle. The display device 10 displays various information. External light L1, which is sunlight, is incident on the display surface of the display device 10 from the window on the right rear side of the vehicle 1. The external light L1 is positively reflected on the display surface and sometimes shines toward the eyes of the driver 2 in the left seat. In this case, it may be difficult for the driver 2 to recognize the display content of the display device 10. Therefore, the display device 10 detects the illuminance near the display surface, and the greater the detected illuminance, the greater the screen brightness. Thus, the visibility of the display device 10 can be improved when the illuminance of the incident light is large.

[0028] Figure 2 The display device 10 is a schematic cross-sectional view of the display device 10 according to the 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 .

[0029] The display panel 12 displays an image. The display panel 12 can control the display brightness. Although not shown in the figure, the display panel 12 has, for example, a liquid crystal panel and a backlight for illuminating the liquid crystal panel. The display panel 12 may also be a self-luminous panel such as an organic EL panel. The touch panel 14 is located on the front surface side of the display panel 12, that is, the observer side, and detects the user's touch on the screen of the display device 10. The touch panel 14 is light-transmissive.

[0030] The cover 16 is located on the observer side of the display panel 12 and the touch panel 14. The cover 16 is light-transmissive. The cover 16 has: a first surface 16a, which is located on the observer side; and a second surface 16b, which is located on the opposite side of the first surface 16a. The first surface 16a is also referred to as a 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 light-transmissive. The decorative layer 18 can be a decorative sheet with a pattern or a layer provided by printing or transferring ink to the cover 16. The surface layer 20 covers the observer side of the decorative layer 18. The surface layer 20 is light-transmissive. The surface layer 20 has, for example, depressions and projections formed by matte processing, and also has the function of diffusing light.

[0031] The image displayed on the display panel 12 can be viewed from the observer side of the surface layer 20. The pattern of the decorative layer 18 can also be viewed from the observer side, and in the area overlapping with the display panel 12, the pattern can be viewed overlapping with the displayed image. In addition, the texture of wood grain can also be expressed by the light diffusion function of the surface layer 20. Thus, the appearance design of the display device 10 can be improved. For example, by using the decorative layer 18 with a pattern matching the interior of the vehicle 1, the display screen of the display device 10 can be integrated into the interior of the vehicle 1.

[0032] The light guide 26 and the illuminance sensor 22 are located on the second surface 16b side relative to 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 the present embodiment, the light guide 26 is composed only of the columnar portion 30. The columnar portion 30 may be cylindrical or prism-shaped. The extension direction d1 of the columnar portion 30 is parallel to the normal direction nd of the surface of the cover 16.

[0033] The columnar portion 30 has a first incident end portion 32 as 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-transmissive. 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 bonded to the second surface 16b of the cover 16 by the adhesive layer 28. The adhesive layer 28 is, for example, a layer formed by curing a light-transmissive adhesive. As the adhesive, for example, a known adhesive such as an optical adhesive or a liquid transparent resin can be used.

[0034] The term “bonding” also includes “fusion bonding.” For example, the cover 16 and the light guide 26 can be bonded together using a welding agent or heat. The adhesive layer 28 is a layer formed by solidifying a portion of the melted cover 16 and a portion of the melted light guide 26 .

[0035] Light guide 26 guides light transmitted through surface layer 20, decorative layer 18, cover 16, and adhesive layer 28 and incident on incident surface 34 of first incident end 32 to illuminance sensor 22. Outgoing surface 36 emits light toward illuminance sensor 22. Outgoing surface 36 is parallel to the surface of cover 16.

[0036] 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 at the light receiving surface, and detects the illuminance of the incident light on the light receiving surface.

[0037] The light guide 26 and the illuminance sensor 22 are arranged beside the display panel 12 when viewed from the viewer's side. Thus, the illuminance sensor 22 can detect an illuminance close to the illuminance of external light incident on the display panel 12.

[0038] The sensor substrate 24 supports the illuminance sensor 22. The sensor substrate 24 also carries circuit elements for processing the output signal of the illuminance sensor 22. The housing 38 covers the periphery of the light guide 26 and accommodates the light guide 26. Figure 2 In the embodiment, the adhesive layer 28 only bonds the light guide 26 to the cover 16, but the adhesive layer 28 may also bond the housing 38 to the cover 16. In addition, the housing 38 may be fitted into the cover 16. In addition, the housing 38 may be bonded to the cover 16 by a member other than the adhesive layer 28, such as a double-sided tape.

[0039] The cover 16 and the light guide 26 may be formed of the same material or different materials. The cover 16 may be made of, for example, polycarbonate, and the light guide 26 may be made of, for example, acrylic. The closer the refractive index of the cover 16 is to that of the light guide 26, the better, and the closer the refractive index of the adhesive layer 28 is to that of the cover 16 and the light guide 26, the better. The reason for this is that the reflectivity at the interface between the cover 16 and the adhesive layer 28 and at 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 with the same material, the reflected light at the first incident end 32 of the light guide 26 can be further reduced.

[0040] Regarding the display panel 12 , for example, the smaller the illuminance detected by the illuminance sensor 22 , the smaller the screen brightness is, and the larger the detected illuminance is, the larger the screen brightness is.

[0041] 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 and no interface between the air and the light guide 26 between the cover 16 and the light guide 26. Therefore, the light transmitted through the cover 16 is not easily reflected at the first incident end 32, so the amount of light guided to the illuminance sensor 22 is not easily reduced. Therefore, the illuminance sensor 22 can detect the illuminance of the light incident on the display device 10 more accurately. Therefore, for example, the display device 10 can appropriately control the brightness of the screen.

[0042] 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. Thus, the presence of the light guide 26 is less likely to give the observer a sense of discomfort.

[0043] In addition, since the extension direction d1 of the columnar portion 30 is parallel to the normal direction nd of the surface of the cover 16, light incident parallel to the normal direction nd can be detected with high accuracy. Since the adhesive layer 28 is present, even if the light guide 26 is used as a component different from the cover 16, the interface between the cover 16 and the air and the interface between the light guide 26 and the air can be easily eliminated.

[0044] (Second embodiment)

[0045] In the second embodiment, the extending direction of the light guide 26 is different from that in the first embodiment. The following description will focus on the differences from the first embodiment.

[0046] Figure 3 1 is a schematic cross-sectional view of the display device 10 according to the second embodiment. The extension 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 the external light to be monitored. Figure 1 In the case of the display device 10 of the vehicle 1 , the direction d1 is determined to be along the incident direction of the external light L1 .

[0047] This makes it possible to more accurately detect the illuminance of external light L1 incident on the display device 10 from the direction d1 intersecting the normal direction nd of the surface of the cover 16. Therefore, the brightness of the display panel 12 can be more appropriately controlled with respect to the external light L1.

[0048] In addition, Figure 1 In the embodiment, the external light L2 incident on the display surface of the display device 10 from the left rear window of the vehicle 1 does not go toward the driver 2 even if it is regularly reflected. Therefore, the detection accuracy of the illuminance is improved relative to that of the external light L1.

[0049] In addition, if Figure 3 As shown, the emission 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 bent, so the light loss in the light guide 26 can be reduced compared to the case where there is a bend. Therefore, it is easy to detect the illumination of the incident light more accurately.

[0050] (Third embodiment)

[0051] The third embodiment is different from the second embodiment in that the light guide 26 is bent. The following description will focus on the differences from the second embodiment.

[0052] Figure 4 1 is a schematic cross-sectional view of the display device 10 of the third embodiment. The light guide 26 includes: a first columnar portion 30a having an incident surface 34 and a first incident end portion 32; and a second columnar portion 30b having an exit surface 36. The second columnar portion 30b is connected to the first columnar portion 30a. In other words, the first columnar portion 30a and the second columnar portion 30b are formed integrally. The extension direction d1 of the first columnar portion 30a is the same as that of the second embodiment. The extension direction d3 of the second columnar portion 30b is parallel to the normal direction nd.

[0053] The emission 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. Thus, the thickness of the display device 10 can be made smaller than that of the second embodiment. Therefore, the display device 10 can be assembled more easily.

[0054] (Modifications of the first to third embodiments)

[0055] In the first to third embodiments, the light guide 26 may be formed integrally with the cover 16. Hereinafter, the differences from the first to third embodiments will be mainly described.

[0056] Figure 5 FIG. 1 is a schematic cross-sectional view of a display device 10 according to a modified example of the first embodiment. Figure 5 In the display device 10 shown in FIG. 1 , the light guide 26 and the cover 16 are formed integrally. Figure 2 The display device 10 shown in FIG. 1 is different.

[0057] Figure 6 FIG. 1 is a schematic cross-sectional view of a display device 10 according to a modified example of the second embodiment. Figure 6 In the display device 10 shown in FIG. 1 , the light guide 26 and the cover 16 are formed integrally. Figure 3 The display device 10 shown in FIG. 1 is different.

[0058] Figure 7 FIG. 1 is a schematic cross-sectional view of a display device 10 according to a modified example of the third embodiment. Figure 7 In the display device 10 shown in FIG. 1 , the light guide 26 and the cover 16 are formed integrally. Figure 4 The display device 10 shown in FIG. 1 is different.

[0059] In these configuration examples, the cover 16 with the light guide 26 can be manufactured by resin molding, for example. 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 that the reflection of external light can be further suppressed. In addition, the number of components can be reduced, and the display device 10 can be manufactured at a lower cost. In addition, the assembly of the display device 10 will be easier.

[0060] (Fourth embodiment)

[0061] The fourth embodiment is different 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.

[0062] Figure 8This is a schematic cross-sectional view of the display device 10 of the fourth embodiment. The light guide 26 extends from the second surface 16b of the cover 16. The light guide 26 has a first columnar portion 40a, a second columnar portion 40b, and a third columnar portion 40c. The first columnar portion 40a has a first incident end portion 32a as an end portion fixed to the cover 16. The second columnar portion 40b has a second incident end portion 32b as an end portion fixed to the cover 16. An extension direction d1 of the first columnar portion 40a intersects with an extension direction d2 of the second columnar portion 40b. The direction d1 and the direction d2 respectively intersect with the normal direction nd of the surface of the cover 16. The direction d1 and the direction d2 are respectively set to be along the incident direction of the external light to be monitored. For example, in a device mounted on Figure 1 In the case of the display device 10 of the vehicle 1 , the direction d1 is determined as the incident direction along the external light L1 , and the direction d2 is determined as the incident direction along the external light L2 .

[0063] The first columnar portion 40a and the second columnar portion 40b are connected to the third columnar portion 40c. In addition, the first columnar portion 40a and the second columnar portion 40b are connected to each other at the portion connected to the third columnar portion 40c. The extension direction d3 of the third columnar portion 40c is parallel to the normal direction nd. The third columnar portion 40c guides the light guided by the first columnar portion 40a and the second columnar portion 40b respectively to the illuminance sensor 22. The exit surface 36 emits light to the illuminance sensor 22. The cover 16, the first columnar portion 40a, the second columnar portion 40b and the third columnar portion 40c are integrally formed by resin molding.

[0064] This configuration can detect the illuminance of the external light L1 with high accuracy and the illuminance of the external light L2 with higher accuracy than the third embodiment. Therefore, the brightness of the display panel 12 can be more appropriately controlled for the external light L2 in addition to the external light L1.

[0065] In addition, according to the incident direction of the external light to be monitored, either direction d1 or direction d2 may be parallel to the normal direction nd of the surface of the cover 16. In addition, similar to the first to third embodiments, the cover 16 and the light guide 26 may be configured as different components, and the first incident end 32a and the second incident end 32b of the light guide 26 may be bonded to the cover 16 by the adhesive layer 28, respectively.

[0066] The present disclosure has been described above based on the embodiments. It should be understood by those skilled in the art that the embodiments are merely illustrative, and various modifications may exist in the combination of their constituent elements or processing procedures, and such modifications are also within the scope of the present disclosure.

[0067] For example, in the first to third embodiments, the decorative layer 18 may cover the second surface 16b instead of the first surface 16a of the cover 16. In this modified example, the surface layer 20 covers the first surface 16a of the cover 16. The first incident end 32 is fixed to the back side 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 is also equivalent to the first incident end 32 being fixed to the cover 16. In addition, in the fourth embodiment, the cover 16 and the light guide 26 are configured as different components, and the decorative layer 18 may cover the second surface 16b instead of the first surface 16a of the cover 16. In this modified example, the first incident end 32a and the second incident end 32b are fixed to the back side of the decorative layer 18 by the adhesive layer 28. This configuration is also equivalent to the first incident end 32a and the second incident end 32b being fixed to the cover 16. In these modified examples, the above-mentioned effects can be obtained because there are no interfaces between cover 16 and air, between decorative layer 18 and air, and between air and light guide 26. In addition, the freedom of configuration of display device 10 can be increased.

[0068] Furthermore, in 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, respectively. In this modification, the first incident end 32 is also fixed to the back surface of the decorative layer 18 covering the second surface 16b by the adhesive layer 28. In addition, in the fourth embodiment, the cover 16 and the light guide 26 are configured as different 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 the adhesive layer 28, respectively. In these modifications, by providing the decorative layer 18 having a pattern on both the first surface 16a and the second surface 16b, a three-dimensional design can be expressed, and thus the degree of freedom in the design of the display device 10 can be increased. Furthermore, by providing the decorative layer 18 on both the first surface 16 a and the second surface 16 b , it is possible to easily adjust the transmittance and the transmission color of the cover 16 to a desired value.

[0069] One aspect of the present disclosure is as follows.

[0070] [Project 1]

[0071] A display device, comprising:

[0072] a display panel that displays an image;

[0073] a cover, located on the observer side of the display panel, having light transmittance, the cover having a first surface and a second surface, the first surface being located on the observer side, and the second surface being located on the opposite side of the first surface;

[0074] a decorative layer covering at least one of the first surface and the second surface;

[0075] an illuminance sensor located on the second surface side relative to the cover and detecting the illuminance of incident light; and

[0076] The light guide has a first incident end portion which is an end portion fixed to the cover and guides the light incident on the first incident end portion to the illuminance sensor.

[0077] According to this scheme, since the first incident end is fixed to the cover, the light transmitted through the cover is not easily reflected at the first incident end, so the amount of light guided to the illuminance sensor is not easily reduced. Therefore, the illuminance sensor can more accurately detect the illuminance of the light incident on the display device. In addition, since the light transmitted through the cover is not easily reflected at the first incident end, the light guide is not easily visible to the observer through the decorative layer. Therefore, the presence of the light guide is not easy to give the observer a sense of disharmony.

[0078] [Project 2]

[0079] The display device according to item 1, wherein:

[0080] The display device includes an adhesive layer that bonds the first incident end portion of the light guide to the cover.

[0081] In this case, even if a light guide body that is a member different from the cover is used, the interface between the cover and the air and the interface between the light guide body and the air can be easily eliminated.

[0082] [Item 3]

[0083] The display device according to item 1 or 2, wherein:

[0084] The light guide is formed of the same material as that of the cover.

[0085] In this case, the reflected light at the first incident end of the light guide can be further reduced.

[0086] [Item 4]

[0087] The display device according to item 1, wherein:

[0088] The light guide is formed integrally with the cover.

[0089] In this case, the number of components can be reduced, and the display device can be manufactured at a lower cost. In addition, the display device can be assembled more easily.

[0090] [Item 5]

[0091] The display device according to any one of items 1 to 4, wherein:

[0092] The light guide has a columnar portion, and the columnar portion has the first incident end portion;

[0093] The extending direction of the columnar portion is parallel to a normal direction of a surface of the cover.

[0094] In this case, the illuminance of light incident parallel to the normal direction of the surface of the cover can be detected with higher accuracy.

[0095] [Item 6]

[0096] The display device according to any one of items 1 to 4, wherein:

[0097] The light guide has a columnar portion, and the columnar portion has the first incident end portion;

[0098] The extending direction of the columnar portion intersects with a normal direction of a surface of the cover.

[0099] In this case, the illuminance of light incident from a direction intersecting with the normal direction of the surface of the cover can be detected with high accuracy.

[0100] [Item 7]

[0101] The display device according to item 5 or 6, wherein:

[0102] The light guide has an exit surface, which emits light to the illumination sensor;

[0103] The emission surface is parallel to the surface of the cover.

[0104] In this case, by arranging the light receiving surface of the illuminance sensor on the sensor substrate in parallel with the emission surface of the light guide, the sensor substrate can be arranged in parallel with the surface of the cover. Therefore, the thickness of the display device can be further reduced.

[0105] [Item 8]

[0106] The display device according to any one of items 1 to 4, wherein:

[0107] The light guide comprises:

[0108] a first columnar portion having the first incident end portion,

[0109] a second columnar portion having a second incident end portion as an end portion fixed to the cover, and

[0110] a third columnar portion connected to the first columnar portion and the second columnar portion and guiding the light respectively guided to the first columnar portion and the second columnar portion to the illuminance sensor;

[0111] An extending direction of the first columnar portion intersects with an extending direction of the second columnar portion.

[0112] In this case, the illuminance of both the light incident along the extending direction of the first columnar portion and the light incident along the extending direction of the second columnar portion can be detected with high accuracy.

[0113] [Item 9]

[0114] The display device according to item 8, wherein:

[0115] The extending direction of the first columnar portion is parallel to a normal direction of a surface of the cover.

[0116] In this case, the illuminance of each of the light incident parallel to the normal direction of the surface of the cover and the light incident from a direction intersecting the normal direction can be detected with high accuracy.

[0117] [Item 10]

[0118] The display device according to item 8, wherein:

[0119] The first columnar portion and the second columnar portion each extend in a direction that intersects with a normal direction of a surface of the cover.

[0120] In this case, the illuminance of light incident from two directions intersecting with the normal direction of the surface of the cover can be detected with high accuracy.

[0121] [Item 11]

[0122] The display device according to any one of items 1 to 10, wherein:

[0123] The decorative layer covers the first surface.

[0124] [Industrial Applicability]

[0125] The present disclosure can be utilized in a display device.

[0126] [Explanation of Reference Numerals]

[0127] 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 portion, 32a…first incident end portion, 32b…second incident end portion, 34…incident surface, 36…exit surface, 40a…first columnar portion, 40b…second columnar portion, 40c…third columnar portion.

Claims

1. A display device, comprising: a display panel that displays an image; a cover having a first surface and a second surface, wherein the first surface is located on the observer side relative to the display panel, has light transmittance, and is located on the observer side, and the second surface is located on the opposite side of 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 relative to the cover and detecting the illuminance of incident light; and The light guide has a first incident end portion which is an end portion fixed to the cover and guides the light incident on the first incident end portion to the illuminance sensor.

2. The display device according to claim 1, wherein: The display device includes an adhesive layer that bonds the first incident end portion of the light guide to the cover.

3. The display device according to claim 1 or 2, wherein: The light guide is formed of the same material as that of the cover.

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

5. The display device according to claim 1 or 2, wherein: The light guide has a columnar portion, and the columnar portion has the first incident end portion; The extending direction of the columnar portion is parallel to a normal direction of a surface of the cover.

6. The display device according to claim 1 or 2, wherein: The light guide has a columnar portion, and the columnar portion has the first incident end portion; The extending direction of the columnar portion intersects with a normal direction of a surface of the cover.

7. The display device according to claim 6, wherein: The light guide has an exit surface, which emits light to the illumination sensor; The emission surface is parallel to the surface of the cover.

8. The display device according to claim 1 or 2, wherein: The light guide comprises: a first columnar portion having the first incident end portion, a second columnar portion having a second incident end portion as an end portion fixed to the cover, and a third columnar portion connected to the first columnar portion and the second columnar portion and guiding the light respectively guided to the first columnar portion and the second columnar portion to the illuminance sensor; An extending direction of the first columnar portion intersects with an extending direction of the second columnar portion.

9. The display device according to claim 1 or 2, wherein: The decorative layer covers the first surface.

Images