# US 10,502,950 B2 · Wearable display device and image display method

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- Number: US 10,502,950 B2
- Document ID: US10502950B2
- Status: Granted
- Kind: B2
- Application number: 15/542,471
- Filed: 2016-01-14
- Published: 2018-09-27
- Granted: 2019-12-10
- Earliest claimed: 2015-05-29
- Assignees: Sony Interactive Entertainment Inc.; Sony Corporation
- Applicants: Sony Corporation; Sony Interactive Entertainment Inc.
- Inventors: Koji Kikuchi; Takamasa Araki; Masatoshi Nakamura; Shotaro Tada; Rei Miyazaki
- Web page: https://patentgrep.com/patent/US10502950B2

## CPC

- G02B 27/0025: {for optical correction, e.g. distorsion, aberration}
- G02B 3/0006: {Arrays (G02B3/02, G02B5/188 take precedence)}
- G02B 3/0056: {arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses (G02B3/0043 takes precedence; miniaturised objectives for electronic devices employing wafer level optics G02B13/0085)}
- G02B 5/22: Absorbing filters {(G02B5/201 - G02B5/208 take precedence)}
- G02B 25/00: Eyepieces; Magnifying glasses
- G02B 27/0172: {characterised by optical features}
- G02B 1/11: Anti-reflection coatings
- G02B 5/3083: {Birefringent or phase retarding elements (G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001)}
- G02B 2027/0123: {comprising devices increasing the field of view}
- G02B 2027/014: {comprising information/image processing systems}
- H04N 5/64: Constructional details of receivers, e.g. cabinets or dust covers (furniture aspects {of television cabinets} A47B81/06)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

With an image display apparatus, such as a head-mounted display, the eyes of a user observe an image displayed on a display panel through an eyepiece in an enlarged manner. A microlens array sheet that is one example of an optical element functioning as an optical lowpass filter is inserted in an optical path running from the display panel to the eyepiece.

## Claims

### Claim 1

A wearable display panel comprising:
a display panel;
an eyepiece; and
an optical element that functions as an optical lowpass filter inserted in an optical path running from said display panel to said eyepiece,
wherein the optical element that functions as said optical lowpass filter is configured such that a diffusion effect is provided in a center section of said display panel and such that a condensing effect is provided in a peripheral section of said display panel.

### Claim 2 (depends on 1)

The wearable display apparatus according to claim 1, wherein an optical element that functions as said optical lowpass filter is any one of a microlens array sheet, an antiglare sheet, and a birefringence element.

### Claim 3 (depends on 1)

The wearable display apparatus according to claim 1, wherein an optical element that functions as said optical lowpass filter is designed in advance such that, as a size of a pixel of said display panel gets larger, an effect as an optical lowpass filter gets greater.

### Claim 4 (depends on 1)

The wearable display apparatus according to claim 1, wherein an optical element that functions as said optical lowpass filter is a microlens array sheet, and said microlens array sheet is designed with a thickness of said microlens array sheet or a curvature of a microlens adjusted in accordance with a size of a pixel of said display panel.

### Claim 5 (depends on 1)

The wearable display apparatus according to claim 1, wherein an optical element that functions as said optical lowpass filter is a microlens array sheet and designed such that, in order to prevent a moir6 from occurring by an interference between a two-dimensional spatial frequency of a pixel array of said display panel and a two-dimensional spatial frequency of an array pattern of microlenses in said microlens array sheet, a two-dimensional spatial frequency of an array pattern of microlenses is adjusted by offsetting a two-dimensional array coordinate of a microlens center in said microlens array sheet from a honeycomb grid.

### Claim 6 (depends on 1)

The wearable display apparatus according to claim 1, wherein an optical element that functions as said optical lowpass filter is a microlens array sheet, and in order to prevent a moir6 from occurring by an interference between a two-dimensional spatial frequency of a pixel array of said display panel and a two-dimensional spatial frequency of an array pattern of microlenses in a microlens array sheet, a microlens array sheet is arranged such that a line of pixels of said display panel and a line of microlenses in a microlens array sheet form a predetermined angle.

### Claim 7 (depends on 1)

The wearable display apparatus according to claim 1, wherein an optical element that functions as said optical lowpass filter is a microlens array sheet, and in order to prevent a moir6 from occurring by an interference between a two-dimensional spatial frequency of a pixel array of said display panel and a two-dimensional spatial frequency of an array pattern of microlenses in a microlens array sheet, an image correction processing for cancelling a light intensity distribution of a moir6 is added in advance to image data to be displayed on said display panel.

### Claim 8

An image display method for displaying, on a wearable display apparatus having a display panel and an eyepiece, an image by inserting an optical element that functions as an optical lowpass filter into an optical path running from said display panel to said eyepiece, wherein the optical element that functions as said optical lowpass filter is configured such that a diffusion effect is provided in a center section of said display panel and such that a condensing effect is provided in a peripheral section of said display panel.