US-12626622-B2 - Display device

US12626622B2US 12626622 B2US12626622 B2US 12626622B2US-12626622-B2

Abstract

A display device includes a first display panel realizing a first image light of a first resolution; and a second display panel realizing a second image light synchronized with the first image light, the second image light having a second resolution lower than the first resolution, wherein a second virtual image implemented by the second image light is superimposed with a first virtual image implemented by the first image light to implement a virtual reality image.

Inventors

Sun-Woong Kim
Dong-Hyeok Kim

Assignees

LG DISPLAY CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20221219
Priority Date: 20211224

Claims (10)

1 . A display device, comprising: a first display panel realizing a first image light of a first resolution; and a second display panel realizing a second image light synchronized with the first image light, the second image light having a second resolution lower than the first resolution, wherein a second virtual image implemented by the second image light is superimposed with a first virtual image implemented by the first image light to implement a virtual reality image, and wherein the first display panel is disposed on a surface of the second display panel which outputs the second image light, the first display panel has a smaller size than the second display panel, and the first display panel overlaps with the second display panel.
2 . The display device of claim 1 , wherein the virtual reality image includes a region A of a center portion corresponding to 30 degrees i.e., ±15 degrees which is a central viewing angle region range of a user's eye, and a region B which corresponds to 40 to 100 degrees which is a peripheral viewing angle region range of the user's eye and surrounds an edge of the region A.
3 . The display device of claim 2 , wherein the virtual reality image has the first virtual image implemented in the region A, and the second virtual image implemented in the region B.
4 . The display device of claim 3 , wherein the second virtual image is cut out corresponding to the region A, and the first virtual image is cut out corresponding to the region B.
5 . The display device of claim 3 , wherein a boundary portion between the first virtual image and the second virtual image of the virtual reality image is blurred.
6 . The display device of claim 5 , wherein an edge of the first virtual image is blurred.
7 . The display device of claim 3 , wherein an edge region of the first virtual image has a resolution between the first resolution and the second resolution.
8 . The display device of claim 1 , wherein the first resolution is 1000 PPI or higher, and the second resolution is 100 PPI or higher.
9 . The display device of claim 1 , wherein each of the first and second display panels includes: a substrate including a plurality of pixel areas; a first electrode disposed in each pixel area on the substrate; an organic light emitting layer disposed on the first electrode; and a second electrode disposed on the organic light emitting layer.
10 . The display device of claim 1 , wherein the second display panel includes a first portion overlapping with the first display panel, and a second portion and a third portion which are on both sides of the first portion and do not overlap with the first display panel.

Description

CROSS REFERENCE TO RELATED APPLICATION The present application claims the priority of Korean Patent Application No. 10-2021-0187715 filed on Dec. 24, 2021, which is hereby incorporated by reference in its entirety for all purposes as if fully set forth herein. BACKGROUND Field of the Invention The present disclosure relates to a display device for displaying an image, more particularly, to a display device for displaying a virtual reality (VR). Discussion of the Related Art Recently, devices for providing an image to a user using a virtual reality device (VR) have been developed. A virtual reality refers to an interface between a human and a computer that makes a specific environment or situation on a computer and makes it as if a user using it is interacting with a real surrounding situation or environment. The virtual reality allows people to see and manipulate environments that are difficult to experience on a daily basis without directly experiencing them. Such the virtual reality can be applied to fields such as education, advanced programming, remote operation, remote satellite surface exploration, exploration data analysis, and scientific visualization. Here, the virtual reality device is a device to which a virtual reality technology is applied to increase a sense of immersion for a single user experiencing the virtual reality, and in particular, a display device for maximizing a sense of visual immersion is considered the most important. For example, a Head Mounted Display (HMD), a Face Mounted Display (FMD), and an Eye Glasses-type Display (EGD) are representative virtual reality devices. Meanwhile, the virtual reality device needs to display a high-resolution image in order to prevent a recognition of pixelation, and it is very difficult to implement a high-resolution image in consideration of a human's viewing angle. SUMMARY Accordingly, the present disclosure is directed to a display device that substantially obviates one or more of the problems due to limitations and disadvantages described above. More specifically, the present disclosure is to provide a display device which can provide a high-resolution virtual reality device. The present disclosure is also to provide a display device which can provide a virtual reality device capable of further improving a three-dimensional effect, a sense of reality, and a sense of immersion. Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the disclosure. These and other advantages of the disclosure will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. To achieve these and other advantages and in accordance with the present disclosure, as embodied and broadly described herein, a display device includes a first display panel realizing a first image light of a first resolution; and a second display panel realizing a second image light synchronized with the first image light, the second image light having a second resolution lower than the first resolution, wherein a second virtual image implemented by the second image light is superimposed with a first virtual image implemented by the first image light to implement a virtual reality image. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the disclosure as claimed. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of the present disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the principles of the disclosure. In the drawings: FIG. 1A is a perspective view schematically illustrating a virtual reality device according to an embodiment of the present disclosure; FIG. 1B is an exploded perspective view of the virtual reality device of FIG. 1A; FIGS. 2A and 2B are schematic views illustrating viewing angle ranges of a human; FIG. 3 is a schematic diagram illustrating a field of view of first and second display panel modules of a virtual reality device according to an embodiment of the present disclosure; FIG. 4A shows a second virtual image implemented in first, second and second, second display panels; c FIG. 4B shows a first virtual image implemented in first, first and second, first display panels; FIGS. 4C and 4D show virtual reality images implemented through a virtual reality device according to an embodiment of the present disclosure; FIG. 5 is a schematic diagram illustrating a display panel module of a virtual reality device according to an embodiment of the present disclosure; and FIGS. 6 to 12 are schematic views illustrating various display device modul