# US 10,321,120 B2 · Display apparatus with electrochromic mirror

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- Number: US 10,321,120 B2
- Document ID: US10321120B2
- Status: Granted
- Kind: B2
- Application number: 14/855,473
- Filed: 2015-09-16
- Published: 2016-05-05
- Granted: 2019-06-11
- Earliest claimed: 2014-10-30
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Keun-bae Jeon; Won Yong Lee
- Web page: https://patentgrep.com/patent/US10321120B2

## CPC

- G02B 30/31: involving active parallax barriers (involving directional light or back-light sources G02B30/33)
- H04N 13/31: using parallax barriers
- G02B 30/27: involving lenticular arrays
- G02F 2201/44: Arrangements combining different electro-active layers, e.g. electrochromic, liquid crystal or electroluminescent layers
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS

## Abstract

A three-dimensional (3D) display apparatus including: a display panel; a backlight configured to supply light to the display panel; and a parallax barrier disposed between the display panel and the backlight, wherein the parallax barrier includes an electrochromic mirror (ECM).

## Claims

### Claim 1

A three-dimensional (3D) display apparatus comprising:
a display panel;
a backlight configured to supply light to the display panel;
a parallax barrier including an electrochromic mirror (ECM) and disposed between the display panel and the backlight; and
a controller configured to control the ECM,
wherein the ECM comprises one or more blocking portions configured to block light and one or more transmitting portions configured to transmit light,
wherein a size and a position of the one or more blocking portions and the one or more transmitting portions, respectively, are adjusted based on electricity applied to the ECM, and
wherein the controller is configured to, in response to a portion of the display panel displaying a dark portion of a screen, control the ECM to set an area of the ECM corresponding to the portion of the display panel as a blocking portion.

### Claim 2 (depends on 1)

The 3D display apparatus of claim 1, wherein
the blocking portions and the transmitting portions are alternately formed in the ECM.

### Claim 3 (depends on 2)

The 3D display apparatus of claim 2, wherein the controller is further configured to adjust positions of the blocking portions and positions of the transmitting portions based on a position of a viewer.

### Claim 4 (depends on 1)

The 3D display apparatus of claim 1, wherein the backlight comprises:
a light guide panel configured to guide the supplied light toward the display panel;
a pair of 3D light sources disposed on opposite ends of the light guide panel; and
a two-dimensional light source disposed behind the light guide panel.

### Claim 5 (depends on 4)

The 3D display apparatus of claim 4, wherein the pair of 3D light sources and the two-dimensional light source comprise respective substrates and respective pluralities of light emitting diodes disposed on the respective substrates.

### Claim 6 (depends on 1)

The 3D display apparatus of claim 1, wherein the display panel comprises a liquid crystal panel.

### Claim 7

A display apparatus comprising:
a display panel;
a backlight configured to supply light to the display panel;
an electrochromic mirror (ECM) disposed between the display panel and the backlight; and
a controller configured to control the ECM,
wherein the ECM comprises one or more blocking portions configured to block light and one or more transmitting portions configured to transmit light,
wherein a size and a position of the one or more blocking portions and the one or more transmitting portions, respectively, are adjusted based on electricity applied to the ECM, and
wherein the controller is configured to, in response to a portion of the display panel displaying a dark portion of a screen, control the ECM to set an area of the ECM corresponding to the portion of the display panel as a blocking portion.

### Claim 8 (depends on 7)

The display apparatus of claim 7, wherein
the blocking portions and the transmitting portions are alternately formed in the ECM.

### Claim 9 (depends on 8)

The display apparatus of claim 8, wherein the backlight comprises:
a light guide panel configured to guide the supplied light toward the display panel;
a pair of 3D light sources disposed on opposite side ends of the light guide panel; and
a two-dimensional light source disposed behind the light guide panel.

### Claim 10 (depends on 7)

The display apparatus of claim 7, wherein a reflectivity of the ECM is adjustable based on the electricity applied to the ECM.

### Claim 11 (depends on 10)

The display apparatus of claim 10, wherein the reflectivity of the ECM is adjustable based on the electricity applied to the ECM to provide the one or more blocking portions and the one or more transmitting portions.

### Claim 12 (depends on 11)

The display apparatus of claim 11, wherein the controller is further configured to control the ECM to form a parallax barrier with the one or more blocking portions and the one or more transmitting portions.

### Claim 13 (depends on 12)

The display apparatus of claim 12, wherein the controller is further configured to control the ECM to form the parallax barrier by forming the one or more blocking portions and the one or more transmitting portions in alternating strips.

### Claim 14 (depends on 12)

The display apparatus of claim 12, wherein the controller is further configured to control the ECM to adjust the parallax barrier based on a position of a viewer of the display apparatus relative to a front of the display panel.

### Claim 15 (depends on 12)

The display apparatus of claim 12, wherein the controller is further configured to control the ECM to adjust the parallax barrier based on a distance of a viewer of the display apparatus from the display panel.