US-12621425-B2 - Detection system

Abstract

A detection system includes a display panel configured to display an image using light from a back surface side, a backlight configured to irradiate the display panel with light from the back surface side, a parallax barrier having a plurality of openings and disposed at a position overlapping the display panel, a sensor region having a detection region and disposed on a back surface of a front plate, a plurality of electrodes provided in the detection region, and a decorative layer having translucency and provided at a position overlapping the detection region and the parallax barrier.

Inventors

• Takuya Nishimoto
• Koji Yoshida
• Makoto Ishikawa

Assignees

• JAPAN DISPLAY INC.

Dates

Publication Date

20260505

Application Date

20240903

Priority Date

20230905

Claims (4)

1. 1 . A detection system comprising: a display panel configured to display an image in a display region using light from a back surface side; a backlight configured to irradiate the display panel with light from the back surface side; a parallax barrier having a plurality of openings and disposed at a position overlapping the display panel; a sensor region having a detection region and disposed on a back surface of a front plate; a plurality of electrodes provided in the detection region; and a decorative layer that has translucency and that includes a plurality of openings through the decorative layer, the decorative layer being provided at a position overlapping the display region displaying the image, the detection region, and the parallax barrier, wherein the display region including a first region and a second region, in the first region on which light from the backlight is incident, a display object is displayed, and in the second region on which light from the backlight is not incident, a pattern of the decorative layer is visible.
2. 2 . The detection system according to claim 1 , wherein a transparent substrate is provided between the decorative layer and the parallax barrier, the electrodes are covered by a protective layer, and the parallax barrier is provided between the transparent substrate and the protective layer.
3. 3 . The detection system according to claim 1 , wherein the electrodes are covered by a protective layer, and the parallax barrier is provided between the front plate and the protective layer.
4. 4 . The detection system according to claim 3 , wherein the parallax barrier is disposed between the front plate and the decorative layer, and the positions of the openings of the decorative layer overlap all or some of the positions of the openings of the parallax barrier.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims the benefit of priority from Japanese Patent Application No. 2023-143971 filed on Sep. 5, 2023, the entire contents of which are incorporated herein by reference. BACKGROUND 1. Technical Field The present disclosure relates to a detection system. 2. Description of the Related Art Conventionally known are display devices that display stereoscopic images without requiring special glasses by a parallax barrier or other mechanisms (e.g., Japanese Patent Application Laid-open Publication No. 2010-204406 (JP-A-2010-204406)). In the technique described in JP-A-2010-204406, the display panel itself may possibly be visually recognized if an observer looks through the parallax barrier when the display device is in a non-display state. Therefore, it is desired to make the display panel itself invisible when the display device is in the non-display state. It is also desired to detect an external proximity object near the region of a stereoscopic image when the display device displays a display object (stereoscopic image). An object of the present disclosure is to provide a detection system that can make a display panel invisible when a display device is in a non-display state and can detect an external proximity object near the region of a display object when the display device displays a stereoscopic image. SUMMARY A detection system according to an embodiment of the present disclosure includes a display panel configured to display an image using light from a back surface side, a backlight configured to irradiate the display panel with light from the back surface side, a parallax barrier having a plurality of openings and disposed at a position overlapping the display panel, a sensor region having a detection region and disposed on a back surface of a front plate, a plurality of electrodes provided in the detection region, and a decorative layer having translucency and provided at a position overlapping the detection region and the parallax barrier. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view schematically illustrating a detection system according to a first embodiment; FIG. 2 is a diagram of a configuration example of a display device according to the first embodiment; FIG. 3 is a plan view for explaining three-dimensional display of the detection system according to the first embodiment; FIG. 4 is a perspective view of a schematic configuration of the detection system according to the first embodiment; FIG. 5A is a plan view for explaining a detection region of a detection device when the display device according to the first embodiment is in a display state; FIG. 5B is a plan view for explaining the detection region of the detection device when the display device according to the first embodiment is a non-display state; FIG. 6 is a plan view of a schematic configuration of the detection device according to the first embodiment; FIG. 7 is a block diagram of a configuration example of a detection circuit of the detection device according to the first embodiment; FIG. 8A is a schematic of the relation between the position of an object to be detected in a space on the detection region and the positions of respective electrodes; FIG. 8B is a schematic of the spatial coordinates of the object to be detected in the space on the detection region; FIG. 9 is a sectional view schematically illustrating the detection system according to a first modification of the first embodiment; FIG. 10 is a sectional view schematically illustrating the detection system according to a second modification of a second embodiment; and FIG. 11 is a sectional view schematically illustrating the detection system according to a third modification of a third embodiment. DETAILED DESCRIPTION Exemplary aspects (embodiments) to embody the present disclosure are described below in greater detail with reference to the accompanying drawings. The contents described in the first embodiment below are not intended to limit the present disclosure. Components described below include components easily conceivable by those skilled in the art and components substantially identical therewith. Furthermore, the components described below may be appropriately combined. What is disclosed herein is given by way of example only, and appropriate modifications made without departing from the spirit of the present disclosure and easily conceivable by those skilled in the art naturally fall within the scope of the present disclosure. To make the explanation more specific, the drawings may possibly illustrate the width, the thickness, the shape, and other elements of each component more schematically than the actual aspect. These elements, however, are given by way of example only and are not intended to limit interpretation of the present disclosure. In the present specification and the drawings, components similar to those previously described with reference to previous drawings are denoted by