Display device

Abstract

To reduce unevenness of visibility in a constitution that uses a protective member by a curved surface shape.SOLUTION: A display device includes: an image display panel 21; and a cover panel (protective member) 3 placed on the image display panel 21, and having light permeability with a curved surface shape. On a visible side surface of the cover panel 3, an anti-glare layer 32 is provided. The anti-glare layer 32 is formed in such a manner that a haze value changes according to a distance to the image display panel 21 right below, and the haze value of a portion whose distance to the image display panel 21 right below is the largest becomes smaller than the haze value of a portion whose distance to the image display panel 21 right below is the smallest.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a display device, and can be applied to a display device that displays vehicle information. [Background technology]

[0002] 2. Description of the Related Art Conventionally, a display device having a curved cover panel (protective member) provided on an image display unit has been disclosed (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-53993 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, when a cover panel (protective member) having a curved surface is used as in the configuration disclosed in Patent Document 1, there is a problem in that the clarity of the image display portion becomes non-uniform. The present invention has been made in consideration of the above points, and has an object to provide a display device that can reduce non-uniformity in clarity in a configuration that uses a protective member with a curved surface shape. [Means for solving the problem]

[0005] In order to solve the above problem, the invention of claim 1 comprises: A display unit and a protective member that is disposed on the display unit and has a curved surface and optical transparency, an antiglare layer is provided on a viewing side surface of the protective member or on a back surface of the protective member that faces the display unit; The antiglare layer is The display is formed so that the haze value changes depending on the distance to the display unit directly below, and the haze value of a portion where the distance to the display unit directly below is large is smaller than the haze value of a portion where the distance to the display unit directly below is small. Effect of the Invention

[0006] According to the present invention, the anti-glare layer is formed so that the haze value changes depending on the distance to the display unit directly below, and the haze value at the portion closest to the display unit directly below is smaller than the haze value at the portion closest to the display unit directly below. This makes it possible to prevent light from being diffused by the anti-glare layer in areas where the distance to the display unit is greater and where light is more diffused and incident on the anti-glare layer. As a result, unevenness in clarity can be reduced even when a protective member with a curved shape is used. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a plan view showing a display device according to a first embodiment of the present invention. [Diagram 2] 2 is a cross-sectional view showing the display device 1 of FIG. 1 taken along line AA. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] (First embodiment) Fig. 1 is a plan view showing a display device according to a first embodiment of the present invention, and Fig. 2 is a cross-sectional view of the display device 1 taken along line AA.

[0009] The display device 1 displays vehicle information in a vehicle. The display device 1 includes an image display panel unit 2, a cover panel 3 as a protective member, a case 4, and a circuit board 5.

[0010] The case 4 is formed by injection molding of a dark colored resin such as polypropylene or ABS resin, has a generally box-like shape with an open top, and accommodates the image display panel unit 2, the circuit board 5, and the like inside.

[0011] The circuit board 5 is made of a rigid wiring board having a wiring pattern formed on a flat glass epoxy base material such as FR-4 (Flame Retardant-4), and is disposed on the rear surface of the image display panel unit 2. The circuit board 5 is formed in a substantially rectangular shape, and a driving circuit for the image display panel unit 2 and the like are mounted on the circuit board 5.

[0012] The image display panel unit 2 includes an image display panel 21 as a display unit that displays image information, and a backlight light source 22. A user (viewer) viewing the display device 1 can view the image information (the vehicle information) through the cover panel 3.

[0013] In this embodiment, the image display panel 21 is configured with a TFT (Thin Film Transistor) type liquid crystal display panel, but may be configured with an organic EL (Electro Luminescence) display panel, in which case the backlight source 22 is omitted. The backlight source 22 is disposed behind the image display panel 21 and emits illumination light to the image display panel 21.

[0014] The cover panel 3 is disposed on the image display panel 2, and is configured as a part having a curved surface shape (curved shape) and light transmission properties. The cover panel 3 includes a light transmission member 31, an antiglare layer 32, and a light blocking layer 33.

[0015] The light transmitting member 31 is a curved member made of a transparent material such as acrylic resin, soda lime glass, etc. It is not necessary for the light transmitting member 31 to be completely transparent, but it may be colored to reduce the light transmittance.

[0016] The antiglare layer 32 can be, for example, a light diffusing layer provided on the viewing side surface of the cover panel 3, and is provided to reduce reflection in the effective image display area C of the image display panel .

[0017] The antiglare layer 32 may be a transparent or opaque coating layer having diffusing beads or the like mixed therein, or may be formed by roughening the surface of the light-transmitting member 31 to impart a diffusing function, or a film having a light diffusing function may be attached to the light-transmitting member 31.

[0018] In this embodiment, the cover panel 3 is formed in a dome shape with the horizontal direction of the display screen curved convexly toward the user side. The antiglare layer 32 is formed so that the haze value changes depending on the distance to the image display panel 21 directly below, and the haze value Haze A of the portion with the (largest) distance DA to the image display panel 21 directly below is smaller than the haze value Haze B of the portion with the (smallest) distance DB to the image display panel 21 directly below (Haze A < Haze B).

[0019] The light-shielding layer 33 is a black-based printed ink layer disposed on the rear surface of the light-transmitting member 31 , and is provided to conceal the non-illuminated parts of the image display panel 21 and the internal structure of the display device 1 .

[0020] Here, the light emitted from the image display panel 21 is diffused in order to ensure viewing angle characteristics. As a result, the light incident on the antiglare layer 32 is diffused according to the distance to the image display panel 21 directly below, and if the haze value of the antiglare layer 32 is kept constant, the greater the distance to the image display panel 21 directly below, the lower the clarity of the light.

[0021] However, if anti-glare layer 32 is formed so that the haze value changes depending on the distance to image display panel 21 directly below, and haze value Haze A at the portion where distance DA to image display panel 21 directly below is the longest is smaller than haze value Haze B at the portion where distance DB to image display panel 21 directly below is the shortest, localized reduction in clarity due to anti-glare layer 32 can be suppressed, and thus uneven clarity can be reduced even when a cover panel with a curved shape is used.

[0022] According to the above configuration, the anti-glare layer 32 is formed so that the haze value changes depending on the distance to the image display panel 21 directly below, and the haze value Haze A at the portion where the distance DA to the image display panel 21 directly below is the longest is smaller than the haze value Haze B at the portion where the distance DB to the image display panel 21 directly below is the shortest. This makes it possible to reduce unevenness in clarity even when a cover panel with a curved shape is used.

[0023] (Other embodiments) Although specific configurations suitable for carrying out the present invention have been described in detail above, the configurations of the above-described embodiments can be modified in various ways without departing from the spirit of the present invention.

[0024] For example, the antiglare layer 32 may be provided on the rear surface of the cover panel 3 (light-transmitting member 31) on the image display panel 21 side, rather than on the viewing side surface of the cover panel 3 (light-transmitting member 31).

[0025] Although the cover panel 3 is curved in a convex shape toward the viewer side, the cover panel 3 may be curved in a concave shape toward the viewer side. In this case, the approximate center portion of the image display panel 21 corresponds to the above-mentioned distance DB, and the peripheral portion of the image display panel 21 corresponds to the above-mentioned distance DA. [Explanation of symbols]

[0026] 1 Display device 2 Image display panel unit 3 Cover panel (protective material) 4 Cases 5 Circuit Board 21 Image display panel (display section) 22 Backlight source 31 Light-transmitting material 32 Anti-glare layer 33 Light blocking layer

Claims

[Claim 1] A display unit and a protective member that is disposed on the display unit and has a curved surface and optical transparency, an antiglare layer is provided on a viewing side surface of the protective member or on a back surface of the protective member that faces the display unit; The anti-glare layer is formed so that the haze value changes depending on the distance to the display unit directly below, and the haze value of a portion of the display unit directly below that is a large distance away is smaller than the haze value of a portion of the display unit directly below that is a small distance away.

Images