JP6460408B2 - Display device - Google Patents

Description

  The present invention relates to a display device, and more particularly to a display device in which an antireflection layer is formed on the surface of a display panel.

  As a display device used for electronic devices such as portable information terminals and car navigation devices, images, information, etc. to enable detection of optical inputs that match the display content such as line-of-sight detection and gesture input A display panel for displaying an image and an optical element such as a camera arranged in close proximity has been put to practical use. For such a display device, Patent Literature 1, Patent Literature 2, and the like are disclosed. Hereinafter, a conventional display device in which a display panel and an optical element are arranged close to each other and an electronic apparatus including the display device will be described with reference to FIGS.

  FIG. 8 is a first explanatory diagram relating to a conventional display device, and shows a configuration of a monitor 211C (display device) according to Patent Document 1 and a car navigation device 211 (electronic device) including the monitor 211C. FIG. 9 is a second explanatory diagram relating to a conventional display device, and shows the configuration of a display device 302 according to Patent Document 2 and a mobile phone 303 (electronic device) including the display device 302. FIG. 9A shows the appearance of the mobile phone 303, and FIG. 9B shows the configuration of the display device 302 provided in the mobile phone 303.

  As shown in FIG. 8, a car navigation device 211 according to Patent Document 1 includes an operation unit 211A for a driver to operate, a main body unit 211B that performs processing that plays a central role of the device, and a monitor 211C for image output. , A communication interface (not shown) and a camera 226 for detecting a line of sight. The monitor 211C is provided with a display panel for displaying information, and the camera 226 is disposed close to the display panel of the monitor 211C.

  As shown in FIG. 9, the mobile phone 303 according to Patent Document 2 includes a display device 302 and a camera unit 360 that is an optical element. A coordinate input device 301 that is a display panel having a coordinate detection function is attached to the display device 302. The coordinate input device 301 includes a first light transmissive substrate 310 and a second light transmissive substrate 320. An electrode 312 a that is an electrode for coordinate detection is formed on the surface of the first translucent substrate 310. In addition, an electrode 322a that is an electrode for coordinate detection is formed on the surface of the second light-transmitting substrate 320, and is disposed to face the surface side of the first light-transmitting substrate 310 with an insulating layer 340 interposed therebetween. Has been.

  The central portion of the second light-transmitting substrate 320 is a display screen, and a decorative print layer 323 (decorative layer) decorated with a predetermined color is provided on the outer peripheral portion of the second light-transmitting substrate 320. It has been. A plurality of space portions 327 are provided at predetermined positions on the outer peripheral portions of the first light-transmitting substrate 310 and the second light-transmitting substrate 320. The above-described camera unit 360 is arranged at a position on the back side of the coordinate input device 301 and corresponding to one of the plurality of space units 327. In recent years, a demand for a display device in which an optical element such as a camera is arranged on the back side of a display panel has been increased from the viewpoint of improving the appearance of an electronic device.

  Although not disclosed in Patent Document 1 or Patent Document 2, the surface of the display panel of such a display device is usually a reflection for suppressing the reflection of external light and improving the visibility of the display screen. A layer called a prevention layer is formed. Since the principle and configuration of the antireflection layer are disclosed in Patent Document 3 and the like, detailed description thereof is omitted, but the antireflection layer is a thin film layer made of a resin material or an inorganic material, and has a predetermined wavelength. It has predetermined optical characteristics (reflectance, refractive index, etc.) for light.

JP 2000-322699 A JP 2011-53738 A JP 2004-167827 A

  In recent years, in the display devices as described above, a display device in which an optical element for near infrared rays is arranged on the back side of a display panel has been put into practical use in order to cope with nighttime use and the like. In such a display device, the optical characteristics of the display panel corresponding to the display screen and the decoration layer (optical characteristics for visible light) and the optical characteristics of the display panel corresponding to the optical element such as a camera (optical for near infrared rays) Characteristics) and the optimum optical characteristics are different. In such a case, on the surface of the display panel, an antireflection layer having an optical characteristic of transmitting near-infrared wavelengths is formed in a region corresponding to an optical element such as a camera, and a display screen or a decoration layer It is desirable to form an antireflection layer having an optical characteristic that transmits the wavelength of visible light in the region corresponding to.

  However, when two antireflection areas having different optical characteristics are provided on the surface of the display panel, the two antireflection layers overlap at the boundary between the two antireflection areas, and are different from the optical characteristics of either antireflection layer. Optical characteristics (transmission wavelength and reflection wavelength). For this reason, light having a wavelength different from that of the two antireflection layers is reflected at the boundary portion, and the color of the two antireflection layers appears different to human eyes. Such a sudden change in the boundary portion of the optical characteristics makes the boundary portion conspicuous, and there is a problem that the appearance of the display panel is deteriorated.

  The present invention has been made in view of the actual situation of the prior art, and an object of the present invention is to provide a display device that can improve the appearance of the display panel by making the boundary portion of the antireflection region inconspicuous. There is.

  In order to solve this problem, the display device according to claim 1 is a display device including a display panel having an antireflection layer formed on a surface thereof, and the surface of the display panel has a first optical characteristic. A first antireflection region in which only the first antireflection layer having the second antireflection layer is formed; a second antireflection region in which only the second antireflection layer having the second optical characteristic is formed; and the first antireflection layer, And a third antireflection region provided with an overlapping portion overlapping the second antireflection layer, wherein the third antireflection region is a boundary between the first antireflection region and the second antireflection region. It is arranged in a part and has a gradation pattern.

  In the display device having this configuration, since the third antireflection region has a gradation pattern, the optical characteristics of the third antireflection region can be changed stepwise. Then, by changing the optical characteristics of the third antireflection region in a stepwise manner, it is possible to suppress an abrupt change in the optical characteristics at the boundary between the first antireflection region and the second antireflection region. As a result, it is possible to improve the appearance of the display panel by making the boundary portion between the first antireflection region and the second antireflection region inconspicuous.

The display device according to claim 2, wherein the overlapping portion is disposed at a plurality of locations of the third antireflection region, and along a direction from the first antireflection region to the second antireflection region in plan view. , At least one of the width dimension and the interval of the overlapped portion is changed stepwise.

In the display device having this configuration, the overlapping portions are arranged at a plurality of locations in the third antireflection region, and the width dimension and the interval of the overlapping portions are along the direction from the first antireflection region toward the second antireflection region. Since at least one of these changes stepwise, the optical characteristics of the third antireflection region can be changed stepwise easily even if the number of antireflection layers is small. As a result, the boundary portion between the first antireflection region and the second antireflection region can be made inconspicuous easily, and the appearance of the display panel can be easily improved.

  In the display device according to claim 3, a decoration region in which a decoration layer is formed is provided on the back surface of the display panel, and the third antireflection region is located at a position overlapping the decoration region in plan view. It is arranged.

  In the display device having this configuration, since the third antireflection region is arranged at a position overlapping the decoration region in plan view, the boundary portion between the first antireflection region and the second antireflection region is further provided by the decoration layer. It can be inconspicuous. As a result, the appearance of the display panel can be further improved.

  The display device according to claim 4, in a region overlapping the third antireflection region in plan view of the decoration region, along a direction from the first antireflection region to the second antireflection region in plan view. In addition, at least one of the color tone and the color density of the decorative layer changes in a stepwise manner.

  In the display device having this configuration, since at least one of the color tone and the color density of the decorative layer changes stepwise in a region overlapping the third antireflection region in a plan view of the decorative region, the first reflection An abrupt change in optical characteristics at the boundary between the prevention region and the second antireflection region can be further suppressed. As a result, the boundary portion between the first antireflection region and the second antireflection region can be made less noticeable, and the appearance of the display panel can be further improved.

In the display device according to claim 5, in a region overlapping the third antireflection region in a plan view of the decoration region, a plurality of decoration portions arranged in a predetermined color are arranged at a plurality of locations, and in a plan view At least one of the width dimension and the interval of the decorating portion changes stepwise along the direction from the first antireflection region toward the second antireflection region.

In the display device having this configuration, the decoration portion is arranged at a plurality of locations in the region overlapping the third antireflection region in plan view of the decoration region, and along the direction from the first antireflection region toward the second antireflection region. In addition, since at least one of the width dimension and the interval of the decoration portion changes stepwise, the rapid change in the optical characteristics at the boundary portion between the first antireflection region and the second antireflection region is further suppressed. be able to. As a result, the boundary portion between the first antireflection region and the second antireflection region can be made less noticeable, and the appearance of the display panel can be further improved.

The display device according to claim 6, wherein, in a plan view, a width dimension of a portion overlapping the overlapping portion of the decorating portion along a direction from the first antireflection region toward the second antireflection region, The ratio of the width dimension of the part which does not overlap with a superimposition part changes in steps.

In the display device of this configuration, the first anti-reflective regions along a direction toward the second antireflection region, and the width of the portion overlapping with the overlapped portion of the decorative portion, the width of the portion that does not overlap with the overlapped portion Since the ratio changes stepwise, it is possible to further suppress a sudden change in optical characteristics at the boundary between the first antireflection region and the second antireflection region. As a result, the boundary portion between the first antireflection region and the second antireflection region can be made less noticeable, and the appearance of the display panel can be further improved.

  The display device according to claim 7, wherein the second antireflection region is formed so as to surround the first antireflection region, and a position on the back surface side of the display panel that overlaps the first antireflection region in a plan view. Is characterized in that an optical element is arranged.

  In the display device having this configuration, optical input in accordance with display contents can be performed by using an optical element arranged on the back side of the display panel. In addition, by arranging the optical element on the back side of the display panel, the optical element can be made inconspicuous and the appearance of the display panel can be improved. Furthermore, the optical characteristic of the first antireflection region can be set in accordance with the optical element by arranging the optical element at a position overlapping the first antireflection region in plan view on the back side of the display panel. It becomes easy to draw out the performance of the element.

  The display device according to claim 8, wherein the first antireflection layer is an antireflection layer for near infrared rays, the second antireflection layer is an antireflection layer for visible light, and the optical element It has the light emitting element for infrared rays, and the image pick-up element for near infrared rays, It is characterized by the above-mentioned.

  In the display device having this configuration, the first antireflection layer is an antireflection layer for near infrared rays, and the optical element includes a light emitting element for near infrared rays and an imaging element for near infrared rays. Optical input can be performed without reducing the visibility of the display panel using near infrared rays. In addition, in the display device with this configuration, the boundary portion between the first antireflection region and the second antireflection region can be made inconspicuous, so that the optical characteristics of the first antireflection layer can be reduced as in the display device with this configuration. This is suitable when the optical properties of the second antireflection layer are greatly different.

  According to the present invention, it is possible to provide a display device capable of improving the appearance of the display panel by making the boundary portion of the antireflection region inconspicuous.

It is explanatory drawing which shows the structure of the display apparatus which concerns on 1st Embodiment of this invention. It is explanatory drawing which shows the structure of the display panel which concerns on 1st Embodiment of this invention. It is explanatory drawing which shows the cross-section of the display panel which concerns on 1st Embodiment of this invention. It is explanatory drawing which shows arrangement | positioning of the reflection preventing layer which concerns on 1st Embodiment of this invention. It is explanatory drawing which shows arrangement | positioning of the decoration layer which concerns on 1st Embodiment of this invention. It is explanatory drawing which shows the cross-section of the display panel which concerns on 2nd Embodiment of this invention. It is explanatory drawing which shows arrangement | positioning of the decoration layer which concerns on 2nd Embodiment of this invention. It is the 1st explanatory view showing the composition of the conventional display device. It is the 2nd explanatory view showing the composition of the conventional display device.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. In the following description, for the sake of convenience, for the sake of convenience, the description will be made with X1 on the left, X2 on the right, Y1 on the front, Y2 on the back, Z1 on and Z2 on the bottom. In order to make the features of the present invention easier to understand, the structure of each member of the display device 1 and the display device 101 is simplified as appropriate, and the dimensions of the members of the display device 1 and the display device 101 are changed as appropriate.

  FIG. 1 is an explanatory diagram showing the configuration of the display device 1 according to the first embodiment of the present invention. FIG. 1A is a schematic diagram when the display device 1 is viewed from the front, and FIG. 1B is a schematic diagram when the display device 1 is viewed from the right side. FIG. 2 is an explanatory diagram showing the configuration of the display panel 10 according to the first embodiment of the present invention. FIG. 2A is a schematic diagram when the display panel 10 is viewed from the front. A shaded portion in FIG. 2A indicates a region where the antireflection layer 20 is formed. FIG. 2B is a schematic diagram when the display panel 10 is viewed from the rear. A hatched portion in FIG. 2B indicates a region where the decorative layer 30 is formed.

  FIG. 3 is an explanatory diagram showing a cross-sectional structure of the display panel 10 according to the first embodiment of the present invention. 3A is a schematic cross-sectional view of the display panel 10 corresponding to the cross-sectional line A1-A1 of FIG. 2A, and FIG. 3B is a third reflection on the right side shown in FIG. It is the cross-sectional schematic diagram which expanded the prevention area | region 15c vicinity. FIG. 4 is an explanatory view showing the arrangement of the antireflection layer 20 according to the first embodiment of the present invention. FIG. 4 is an enlarged schematic view of a region surrounded by an imaginary line L1 (dashed line) in FIG. In FIG. 4, a portion drawn with a right-down oblique line and a left-down oblique line intersecting each other indicates a region where the overlapping portion 23 is formed, and a portion drawn only with a right-down oblique line is a second antireflection layer. The region where only 22 is formed is shown, and the other part shows the region where only the first antireflection layer 21 is formed. FIG. 5 is a schematic diagram of the display panel 10 in which a region surrounded by an imaginary line L2 (dashed line) in FIG. 2B is enlarged. The hatched portion in FIG. 5 indicates a region where the decorative layer 30 is formed.

  FIG. 6 is an explanatory view showing a cross-sectional structure of the display panel 110 according to the second embodiment of the present invention. 6A is a schematic cross-sectional view of the display panel 110 corresponding to the same cross-sectional position as FIG. 3A, and FIG. 6B is a third antireflection region on the right side shown in FIG. 6A. It is the cross-sectional schematic diagram which expanded 15c vicinity. FIG. 7 is a schematic diagram of the display panel 110 corresponding to the same region as FIG. A hatched portion in FIG. 7 indicates a region where the decorative portion 31 is formed.

[First Embodiment]
First, the configuration of the display device 1 according to the first embodiment of the present invention will be described with reference to FIGS. A display device 1 according to the first embodiment of the present invention is a display device used in an electronic device such as a portable information terminal or a car navigation device. As shown in FIG. 1, a display panel 10, a display unit 40, and The optical element 50 is provided.

  The display panel 10 is a substantially rectangular light-transmitting plate-like member made of a material such as glass or synthetic resin. As shown in FIG. 1, the display panel 10 has a front surface 11 (front surface) and a back surface 12 (rear side). Side). Near the center of the display panel 10 is provided a substantially rectangular display screen 13 on which images and information are displayed. At a predetermined position on the outer peripheral portion of the display panel 10, a light transmitting portion 14 that transmits near-infrared light is provided.

  Further, as shown in FIGS. 1 and 2, the surface 11 of the display panel 10 is an antireflection layer that is a layer for suppressing reflection of external light such as sunlight and artificial illumination light made of a material such as resin. Layer 20 is formed. Hereinafter, the region where the antireflection layer 20 is formed on the surface 11 of the display panel 10 is abbreviated as an antireflection region 15. As shown in FIGS. 3 and 4, the antireflection region 15 includes three types of regions: a first antireflection region 15 a, a second antireflection region 15 b, and a third antireflection region 15 c.

  The first antireflection region 15a is a region in which only the first antireflection layer 21 having the first optical characteristics (reflectance, refractive index, etc.) for near infrared rays is formed. It is provided in the position which overlaps. The second antireflection region 15b is a region where only the second antireflection layer 22 having the second optical characteristic for visible light is formed, and surrounds the first antireflection region 15a with a gap as viewed from the front. It is provided as follows. The third antireflection region 15c is a region in which annular overlapping portions 23 and non-overlapping portions 24 surrounding the first antireflection region 15a are alternately formed outward, and the first antireflection region 15a. And the second antireflection region 15b.

  The overlapping portion 23 is a portion where the first antireflection layer 21 is overlaid on the second antireflection layer 22, and is provided at a plurality of locations in the third antireflection region 15c. The plurality of overlapping portions 23 each have a substantially square annular shape with different outer diameters, and the outer overlapping portion 23 is disposed so as to surround the inner overlapping portion 23 with a gap when viewed from the front. . The non-overlapping portion 24 is a portion where only the second antireflection layer 22 is formed, and a portion of a gap between the outer overlapping portion 23 and the inner overlapping portion 23 is the non-overlapping portion 24.

  The third antireflection region 15c includes a width dimension W1 (hereinafter, abbreviated as a width dimension W1 of the overlapping portion 23) along the direction from the inner side to the outer side of the overlapping portion 23 and the inner side to the outer side of the non-overlapping portion 24. The gradation pattern is such that the width dimension along the direction, that is, the interval D1 between two adjacent overlapping portions 23 (hereinafter, abbreviated as the interval D1 of the overlapping portions 23) changes stepwise. . In the present embodiment, the width dimension W1 of the overlapping portion 23 decreases stepwise along the direction from the first antireflection region 15a to the second antireflection region 15b (from the inside to the outside) when viewed from the front. The interval D1 of 23 increases stepwise.

  As shown in FIGS. 1 and 2, a decoration layer 30 decorated with a predetermined color is formed at a predetermined position on the back surface 12 of the display panel 10. Hereinafter, the area | region where the decoration layer 30 of the back surface 12 of the display panel 10 was formed is abbreviated as the decoration area | region 16, and the area | region in which the decoration layer 30 is not formed is abbreviated as the non-decoration area | region 17. The decoration region 16 is provided on the outer peripheral portion of the back surface 12 of the display panel 10 so as to surround the display screen 13 when viewed from the front. The non-decorative region 17 is provided at a position overlapping the display screen 13 when viewed from the front and a position overlapping the light transmitting portion 14.

  As shown in FIGS. 3 and 5, the decoration region 16 includes two types of regions, a gradation region 16a and a non-gradation region 16b. The gradation region 16a is a region where the color tone and color density of the decorative layer 30 change stepwise, and the portion of the decorative region 16 that overlaps with the third antireflection region 15c when viewed from the front is the floor. It is a tone area 16a. And in the gradation area | region 16a, the color tone and color density of the decoration layer 30 change in steps along the direction which goes to the 2nd antireflection area | region 15b from the 1st antireflection area | region 15b seeing from the front. Changes in the color tone and color density of the decorative layer 30 in the gradation area 16a reduce the color difference between the first antireflection area 15a and the second antireflection area 15b when viewed from the front. It has changed. The non-gradation area 16b is an area where the color tone and color density of the decorative layer 30 do not change stepwise, and a portion other than the gradation area 16a in the decoration area 16 is the non-gradation area 16b. It has become.

  The display unit 40 is a unit for image display including a liquid crystal display element, and is arranged behind the display screen 13 of the display panel 10 as shown in FIG. The display unit 40 is driven by a drive circuit (not shown) to display various images and information on the display screen 13.

  The optical element 50 is a sensor element for detecting an optical input such as line-of-sight detection or gesture input, and is disposed behind the light transmitting portion 14 of the display panel 10 as shown in FIG. . In the present embodiment, the optical element 50 is a sensor element in which a light emitting element 51 and an imaging element 52 are combined. The light emitting element 51 is a light emitting diode for near infrared rays, and the imaging element 52 is a camera for near infrared rays.

  The near-infrared light emitted from the light emitting element 51 passes through the light transmitting portion 14 of the display panel 10 and is emitted to the outside, and the reflected light of the emitted light passes through the light transmitting portion 14 of the display panel 10. Light enters the image sensor 52. The display device 1 has such a configuration.

  Next, the effect of this embodiment will be described. In the display device 1 of the present embodiment, since the third antireflection region 15c has a gradation pattern, the optical characteristics of the third antireflection region 15c can be changed stepwise. Then, by changing the optical characteristics of the third antireflection region 15c in stages, it is possible to suppress a rapid change in the optical characteristics at the boundary between the first antireflection region 15a and the second antireflection region 15b. it can. As a result, the boundary between the first antireflection region 15a and the second antireflection region 15b can be made inconspicuous, and the appearance of the display panel 10 can be improved.

  Further, in the display device 1 of the present embodiment, the overlapping portions 23 are arranged at a plurality of locations of the third antireflection region 15c, and when viewed from the front, the first antireflection region 15a to the second antireflection region 15b (from inside to outside). Since the width dimension W1 of the overlapping portion 23 and the distance D1 between the overlapping portions 23 change in a stepwise direction, the optical property of the third antireflection region 15c can be easily obtained even if the number of types of the antireflection layer 20 is small. The characteristics can be changed step by step. As a result, the boundary portion between the first antireflection region 15a and the second antireflection region 15b can be easily made inconspicuous, and the appearance of the display panel 10 can be easily improved.

  Further, in the display device 1 of the present embodiment, the third antireflection region 15c is disposed at a position overlapping the decoration region 16 when viewed from the front, so the first antireflection region 15a and the second antireflection region 15b The boundary portion of the decorative layer 30 can be made more inconspicuous. As a result, the appearance of the display panel 10 can be further improved.

  Further, in the display device 1 of the present embodiment, the color tone and color density of the decorative layer 30 are stepped in the gradation region 16a of the decorative region 16 (region overlapping the third antireflection region 15c when viewed from the front). Therefore, it is possible to further suppress an abrupt change in optical characteristics at the boundary between the first antireflection region 15a and the second antireflection region 15b. As a result, the boundary portion between the first antireflection region 15a and the second antireflection region 15b can be made less noticeable, and the appearance of the display panel 10 can be further improved.

  Further, in the display device 1 of the present embodiment, an optical input that matches the display content can be performed using the optical element 50 arranged on the back surface 12 side of the display panel 10. In addition, by disposing the optical element 50 on the back surface 12 side of the display panel 10, the optical element 50 can be made inconspicuous and the appearance of the display panel 10 can be improved. Further, by arranging the optical element 50 on the back surface 12 side of the display panel 10 so as to overlap the first antireflection area 15a in plan view, the optical characteristics of the first antireflection area 15a are set according to the optical element 50. Therefore, the performance of the optical element 50 can be easily extracted.

  Further, in the display device 1 of the present embodiment, the first antireflection layer 21 is the antireflection layer 20 for near infrared, and the optical element 50 includes a near infrared light emitting element 51 and a near infrared imaging element 52. Since it is included, optical input can be performed without reducing the visibility of the display panel 10 using near-infrared rays at night use or the like. Moreover, in the display device 1, the first antireflection layer 21 is an antireflection layer for near infrared rays, and the second antireflection layer 22 is an antireflection layer for visible light. Although the characteristics and the optical characteristics of the second antireflection layer 22 are greatly different, the boundary portion between the first antireflection region 15a and the second antireflection region 15b can be made inconspicuous. This is suitable when the optical characteristics and the optical characteristics of the second antireflection layer 22 are greatly different.

[Second Embodiment]
Next, the structure of the display apparatus 101 which concerns on 2nd Embodiment of this invention is demonstrated using FIG.6 and FIG.7. In addition, in this embodiment, when it is the same structure as 1st Embodiment mentioned above, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  As shown in FIGS. 6 and 7, the display device 101 according to the second embodiment of the present invention is obtained by replacing the display panel 10 of the display device 1 of the first embodiment with a display panel 110. The display panel 110 has the back surface 12 and the surface 11 similarly to the display panel 10 of 1st Embodiment. An antireflection region 15 is provided on the surface 11 of the display panel 110, and the antireflection region 15 includes a first antireflection region 15a, a second antireflection region 15b, and a third antireflection region 15c. It consists of different areas. In addition, a decoration area 16 and a non-decoration area 17 are provided on the back surface 12 of the display panel 110. The decoration area 16 includes two types of areas, a gradation area 16a and a non-gradation area 16b. It is configured. And the part which overlaps with the 3rd antireflection area | region 15c seeing from the front among the decoration area | regions 16 is the gradation area | region 16a.

  However, in the present embodiment, unlike the display panel 10, the gradation area 16a is colored with a predetermined color and arranged in a plurality of places in the gradation area 16a, and the decoration section 31 is disposed. It is an area where there are no non-decorated parts 32. The plurality of decorating portions 31 have a substantially square annular shape with different outer diameters, and are arranged so that the outer decorating portion 31 surrounds the inner decorating portion 31 with a gap when viewed from the front. Has been. And the part of the clearance gap between the outer side decoration part 31 and the inner side decoration part 31 is the non-decoration part 32. FIG.

  The gradation region 16a includes a width dimension W2 (hereinafter, abbreviated as a width dimension W2 of the decoration portion 31) along the direction from the inside to the outside of the decoration portion 31, and the inside to the outside of the non-decoration portion 32. The width dimension along the direction toward, that is, the interval D2 between two adjacent decorating portions 31 (hereinafter, abbreviated as the interval D2 between the decorating portions 31) is a gradation pattern that changes stepwise. Yes. In the present embodiment, the width dimension W2 of the decorative portion 31 increases stepwise along the direction from the first antireflection region 15a to the second antireflection region 15b (from the inside to the outside) when viewed from the front. The interval D2 of the decoration part 31 decreases stepwise.

  Moreover, the decoration part 31 is arrange | positioned at the gradation area | region 16a so that at least one part of the decoration part 31 may overlap with the superimposition part 23 seeing from the front. And in the gradation area | region 16a, it does not overlap with the superimposition part 23 of the decoration part 31 with respect to the width dimension W3 (width dimension along the direction which goes to an outer side from the inner side) of the part which overlaps with the superimposition part 23 of the decoration part 31. The ratio of the width dimension W4 (width dimension along the direction from the inside toward the outside) of the portion changes stepwise. In the present embodiment, the ratio of the width dimension W4 to the width dimension W3 increases stepwise along the direction from the first antireflection area 15a to the second antireflection area 15b when viewed from the front.

  Next, the effect of this embodiment will be described. In the display device 101 of the present embodiment, the decorative portions 31 are arranged at a plurality of locations in the gradation region 16a, and are added along the direction from the first antireflection region 15a to the second antireflection region 15b when viewed from the front. Since the width dimension W2 of the decoration part 31 and the space | interval D2 of the decoration part 31 change in steps, the sudden change of the optical characteristic in the boundary part of the 1st antireflection area | region 15a and the 2nd antireflection area | region 15b is carried out. Further suppression can be achieved. As a result, the boundary portion between the first antireflection region 15a and the second antireflection region 15b can be made less noticeable, and the appearance of the display panel 10 can be further improved.

  Further, in the display device 101 of the present embodiment, the width dimension W3 of the portion overlapping the overlapping portion 23 of the decorating portion 31 along the direction from the first antireflection region 15a to the second antireflection region 15b when viewed from the front. And the ratio of the width dimension W4 of the portion that does not overlap the overlapping portion 23 changes in a stepwise manner, so that a sudden change in the optical characteristics at the boundary portion between the first antireflection region 15a and the second antireflection region 15b occurs. Further suppression can be achieved. As a result, the boundary portion between the first antireflection region 15a and the second antireflection region 15b can be made less noticeable, and the appearance of the display panel can be further improved.

  As mentioned above, although embodiment of this invention has been described, this invention is not limited to said embodiment, As long as it does not deviate from the summary of this invention, it can change suitably.

  For example, in the embodiment of the present invention, the configuration, dimensions, and the like of the display device 1 and the display device 101 may be appropriately changed as long as a predetermined function can be realized. For example, the display device 1 and the display device 101 do not include the optical element 50, and an optical element on the electronic device side (not shown) may be disposed behind the display panel 10 or the display panel 110. The display device 1 and the display device 101 may further include members other than those described above, such as a transparent electrode for coordinate input.

  In the embodiment of the present invention, as long as a predetermined function can be realized, the number, shape, and dimensions of the overlapping portion 23 may be appropriately changed. For example, a large number of small circular or square overlapping portions 23 may be arranged in the third antireflection region 15c, and the outer diameter of the overlapping portions 23 or the interval between adjacent overlapping portions 23 may be changed stepwise. Further, as long as a predetermined function can be realized, only one of the width dimension W1 of the overlapping portion 23 and the interval D1 of the overlapping portion 23 may be changed in a stepwise manner. Further, the overlapping portion 23 is a portion where the second antireflection layer 22 is superimposed on the first antireflection layer 21, and the non-overlapping portion 24 is a portion where only the first antireflection layer 21 is formed. I do not care.

  In the embodiment of the present invention, if a predetermined function can be realized, one overlapping portion 23 having a shape covering the entire third antireflection region 15c is arranged in the third antireflection region 15c, and the overlapping portion is arranged. The third antireflection region 15c may be used as a gradation region by changing the thickness dimension in the front-rear direction 23 in a stepwise manner. In addition, one overlapping portion 23 shaped to cover the entire third antireflection region 15c is arranged in the third antireflection region 15c, and the thick portions and the thin portions in the front-rear direction of the overlapping portions 23 are alternately arranged. The third antireflection region 15c may be formed as a gradation region by changing the width dimension and the interval of at least one of the thick portion and the thin portion of the overlapping portion 23 in a stepwise manner.

  In the first embodiment of the present invention, as long as a predetermined function can be realized, only one of the color tone and the color density of the decorative layer 30 may be changed stepwise. Further, if the appearance of the display panel can be improved only by the width dimension W1 of the overlapping portion 23 and the interval D1 of the overlapping portion 23, the color tone and lightness of the decorative layer 30 need not be changed stepwise. I do not care.

  Further, in the second embodiment of the present invention, as long as a predetermined function can be realized, the number, shape, and dimensions of the decorative portion 31 may be changed as appropriate. Moreover, as long as a predetermined function can be realized, only one of the width dimension W2 of the decorating part 31 and the interval D2 of the decorating part 31 may be changed stepwise. Further, if the appearance of the display panel can be improved only by the width dimension W2 of the decoration part 31 and the interval D2 of the decoration part 31, the ratio between the width dimension W3 and the width dimension W4 is changed stepwise. You don't have to.

  Further, in the embodiment of the present invention, the display unit 40 may be other than those described above. Further, the optical element 50 may be only one of the light emitting element 51 and the imaging element 52, or may be another optical element. The optical element 50 may not be an optical element for near infrared rays. Even in such a case, if the optical characteristics of the display panel are different between the region corresponding to the optical element and the other region, the same effect as described above can be obtained.

  In the embodiment of the present invention, the display device 1 and the display device 101 may be used for electronic devices other than those described above, such as tablet terminals and game machines. Then, the orientation of the display device 1 or the display device 101 may be changed as appropriate according to the standard of the electronic device to be used.

DESCRIPTION OF SYMBOLS 1 Display apparatus 10 Display panel 11 Front surface 12 Back surface 13 Display screen 14 Translucent part 15 Antireflection area | region 15a 1st antireflection area | region 15b 2nd antireflection area | region 15c 3rd antireflection area | region 16 Decoration area | region 16a Gradation area | region 16b Non-floor Tone region 17 Non-decorated region 20 Anti-reflective layer 21 First anti-reflective layer 22 Second anti-reflective layer 23 Superposed portion 24 Non-superimposed portion 30 Decorated layer 31 Decorated portion 32 Non-decorated portion 40 Display portion 50 Optical element 51 Light emitting element 52 Imaging element 101 Display device 110 Display panel

Claims (8)

A display device comprising a display panel having an antireflection layer formed on the surface,
On the surface of the display panel, a first antireflection region in which only the first antireflection layer having the first optical characteristic is formed and a second antireflection layer having the second optical characteristic is formed. Two antireflection regions, and a third antireflection region in which an overlapping portion in which the first antireflection layer and the second antireflection layer overlap each other is provided,
The display device, wherein the third antireflection region is arranged at a boundary portion between the first antireflection region and the second antireflection region, and has a gradation pattern. The overlapping portion is disposed at a plurality of locations in the third antireflection region,
The at least one of the width dimension and the space | interval of the said superimposition part changes in steps along the direction which goes to the said 2nd antireflection area from the said 1st antireflection area in planar view, The display device according to 1. A decoration area in which a decoration layer is formed is provided on the back surface of the display panel,
The display device according to claim 1, wherein the third antireflection region is disposed at a position overlapping the decoration region in plan view.   In a region that overlaps the third antireflection region in plan view of the decoration region, the color tone and shading of the decoration layer along the direction from the first antireflection region to the second antireflection region in plan view 4. The display device according to claim 3, wherein at least one of and changes in a stepwise manner. In a region overlapping with the third antireflection region in plan view of the decoration region, a plurality of decoration portions arranged in a predetermined color are arranged at a plurality of locations,
At least one of the width dimension and the interval of the decorative portion changes stepwise along a direction from the first antireflection region to the second antireflection region in plan view. Item 5. A display device according to item 3 or item 4. Along in a plan view from the first anti-reflection region in a direction toward the second antireflection region, and the width of the portion overlapping the overlapped portion of the decorative portion, and the width of the portion which does not overlap with the superimposed portions The display device according to claim 5, wherein the ratio of the change is stepwise. The second antireflection region is formed so as to surround the first antireflection region;
7. The display device according to claim 1, wherein an optical element is disposed on a back surface side of the display panel at a position overlapping the first antireflection region in a plan view. . The first antireflection layer is an antireflection layer for near infrared, and the second antireflection layer is an antireflection layer for visible light,
The display device according to claim 7, wherein the optical element includes a light emitting element for near infrared rays and an imaging element for near infrared rays.