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JP-2026074712-A - display device

JP2026074712AJP 2026074712 AJP2026074712 AJP 2026074712AJP-2026074712-A

Abstract

[Problem] To provide a display device that can change its appearance pattern. [Solution] The display device 100 includes a display panel 1, a first light guide 2 having a first cover portion 21 that guides the first light La from the first light source 6a into the interior and covers the display panel 1 from the front, a first decorative layer 3 provided on the rear surface of the first cover portion 21, a second light guide 4 having a second cover portion 41 that guides the second light Lb from the second light source 6b into the interior and covers the first cover portion 21 from the front, and a second decorative layer 5 provided on the rear surface of the second cover portion 41. The first decorative layer 3 and the second decorative layer 5 are decorated with different patterns. A first reflective portion 21a is formed on the front surface of the first cover portion 21 to reflect the first light La towards the first decorative layer 3. A second reflective portion 41a is formed on the front surface of the second cover portion 41 to reflect the second light Lb towards the second decorative layer 5. [Selection Diagram] Figure 2

Inventors

  • 岡田 裕司

Assignees

  • 日本精機株式会社

Dates

Publication Date
20260507
Application Date
20241021

Claims (3)

  1. A display panel that displays images, A first light guide has a first light receiving section that receives a first light, and a first covering section that guides the first light incident on the first light receiving section into the interior and covers the display panel from the front, A first light source that emits the first light toward the first light receiving unit, A first decorative layer having light transmittance is provided on the rear surface of the first covering portion, A second light guide has a second light receiving section that receives a second light, and a second cover section that guides the second light incident on the second light receiving section into the interior and covers the first cover section from the front, A second light source that emits the second light toward the second light receiving unit, The second decorative layer, which is provided on the rear surface of the second covering portion and has light-transmitting properties, is provided, The first decorative layer and the second decorative layer are each decorated with different patterns. A first reflective portion is formed on the front surface of the first covering portion, which reflects the first light towards the first decorative layer. A second reflective portion is formed on the front surface of the second covering portion, which reflects the second light towards the second decorative layer. The first light source and the second light source are controlled to be in a state where both are off, a state where one is on and the other is off, and a state where both are on. Display device.
  2. The first light source and the second light source are located on opposite sides of the display panel. The display device according to claim 1.
  3. The display brightness when the display panel displays the image is higher when at least one of the first and second light sources is lit than when both the first and second light sources are off. The display device according to claim 1 or 2.

Description

This disclosure relates to a display device. Patent Document 1 describes a display device in which the front surface of the display that shows images is covered with a light-transmitting screen with a wood-grain pattern. Japanese Patent Publication No. 2001-331132 A front view of a display device according to one embodiment of the present disclosure.Schematic cross-sectional view of the display device along line I-I shown in Figure 1. One embodiment of this disclosure will be described with reference to the drawings. The display device 100 shown in Figure 1 is mounted, for example, on the vehicle's dashboard (including the instrument panel) and displays various information about the vehicle. In this paper, the direction from the user (a passenger in the vehicle, primarily the driver) to the display device 100 is defined as "forward," and the opposite direction is defined as "rear." In Figure 2, the front of the display device 100 is represented by "F," and the rear by "B." Furthermore, the left, right, up, and down directions refer to the direction from the passenger's perspective. As shown in Figure 2, the display device 100 comprises a display panel 1, a first light guide 2, a first decorative layer 3, a second light guide 4, a second decorative layer 5, a circuit board 6, a case 7, and a cover panel 8. The circuit board 6 is equipped with a first light source 6a emitting first light La, a second light source 6b emitting second light Lb, and a control unit 6c. The display panel 1 is composed of a liquid crystal panel, an organic EL (Electro-Luminescence) panel, etc., and displays an image facing forward. As shown by the dashed line in Figure 1, the display panel 1 has a rectangular shape when viewed from the front. The first light guide 2 is molded from a resin such as PMMA (Polymethyl methacrylate) or PC (Polycarbonate) and has light-transmitting properties. The first light guide 2 comprises a first light-receiving section 20 that receives the first light La, and a first covering section 21 that guides the first light La incident on the first light-receiving section 20 into the interior and covers the display panel 1 from the front. The first light-receiving unit 20 is positioned so as not to face the display panel 1 in the front-to-back direction, and in this example, it is located below the first cover portion 21. The first light-receiving unit 20 has a roughly L-shape in cross-section, and includes a first light-receiving surface 20a facing the first light source 6a, and a first inclined surface 20b that reflects the first light La incident on the first light-receiving surface 20a toward the first cover portion 21. One end of the first light-receiving unit 20 is the first light-receiving surface 20a, and the other end is connected to the first cover portion 21. The first light, La, incident on the first light-receiving section 20 from the first light-receiving surface 20a, is reflected by the inclined surface 20b and directed towards the first cover section 21. The first light, La, reflected by the inclined surface 20b, is directed upward and guided into the interior of the first cover section 21. The first light-receiving surface 20a may be formed as a lens surface so that the incident first light, La, can be received by the first light-receiving section 20 as light parallel to the optical axis of the first light source 6a. The first cover portion 21 guides the first light La incident on the first light receiving portion 20 into its interior, as described above. The first cover portion 21 is formed in a plate-like shape that covers the display panel 1 from the front. For example, when viewed from the front, the first cover portion 21 has a rectangular shape that is slightly larger than the display panel 1. A first reflective portion 21a is formed on the front surface of the first covering portion 21, which reflects the first light La towards the first decorative layer 3. The first reflective portion 21a is a collection of fine recesses formed across the entire front surface of the first covering portion 21. Figure 2 shows an example where the cross-sectional shape of the recesses constituting the first reflective portion 21a is V-shaped, but the shape of the recesses is arbitrary as long as they can reflect the arriving first light La backward. For example, the recesses constituting the first reflective portion 21a may be shaped to reflect only light from a certain direction (for example, the first light La traveling upward on the first covering portion 21) backward. Furthermore, the multiple recesses constituting the first reflective section 21a may be configured to allow the first decorative layer 3 to be evenly illuminated by the first light La (hereinafter referred to as the illumination unevenness reduction configuration of the first reflective section 21a). As an illumination unevenness reduction configuration for the first reflective section 21a, a configuration can be adopted in which the den