# US 8,786,812 B2 · Liquid crystal display device

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- Number: US 8,786,812 B2
- Document ID: US8786812B2
- Status: Granted
- Kind: B2
- Application number: 13/414,048
- Filed: 2012-03-07
- Published: 2012-09-27
- Granted: 2014-07-22
- Earliest claimed: 2011-03-22
- Assignees: Japan Display Inc.
- Applicants: Toshio Miyazawa; Terunori Saitou
- Inventors: Toshio Miyazawa; Terunori Saitou
- Web page: https://patentgrep.com/patent/US8786812B2

## CPC

- G02B 30/28: involving active lenticular arrays
- G03B 21/006: {using LCD's}
- G02B 3/12: Fluid-filled or evacuated lenses
- G02B 30/27: involving lenticular arrays
- G02F 1/134363: {for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]}
- G02F 1/13471: {in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells (G02F1/13475 takes precedence)}
- H04N 13/305: using lenticular lenses, e.g. arrangements of cylindrical lenses
- H04N 13/359: Switching between monoscopic and stereoscopic modes
- G02F 1/294: {Variable focal length devices}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)
- 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
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A liquid crystal lens is provided on a liquid crystal display panel. Electrodes extending vertically to a plane of drawing are provided on an upper substrate of the liquid crystal lens at predetermined intervals. No electrodes are provided on a lower substrate. An initial alignment of liquid crystal molecules in the liquid crystal lens is vertically directed with respect to the plane of the drawing. A voltage applied to the upper substrate electrodes generates a transverse electric field to rotate the liquid crystal molecules. Polarization light emitted from the liquid crystal display panel is vertically directed to the plane of the drawing, which generates a refractive index distribution of the polarization light in a liquid crystal layer to form a convex lens within the liquid crystal lens. This lens allows first and second pixels to be recognized by right and left eyes to allow a three-dimensional display.

## Claims

### Claim 1

A liquid crystal display device having a liquid crystal lens arranged on a liquid crystal display panel,
wherein the liquid crystal display panel includes pixels each having a red sub-pixel, a green sub-pixel, and a blue sub-pixel arranged in a first direction, which are provided in the first direction at first intervals, and further arranged in a second direction orthogonal to the first direction at second intervals;
the liquid crystal lens is formed by interposing a liquid crystal between a first substrate and a second substrate;
the first substrate includes a plurality of first electrodes in stripes, extending in the first direction, and arranged in the second direction each at an interval twice as large as the second interval, each of the plurality of first electrodes in stripes having a same width;
the second substrate includes a plurality of second electrodes in stripes and a plurality of third electrodes in stripes, extending in the second direction, and arranged in the first direction at predetermined intervals, having the plurality of second electrodes arranged in the first direction at the interval at least twice as large as the first interval, each of the plurality of third electrodes in stripes having a width greater than a width of each of the plurality of second electrodes in stripes;
an initial alignment of liquid crystal molecules between the first and second substrates is in the second direction; and
different voltages are allowed to be applied to the plurality of first, second and third electrodes.

### Claim 2 (depends on 1)

The liquid crystal display device according to claim 1, wherein a direction of the initial alignment of the liquid crystal molecules in the liquid crystal lens is consistent with an extending direction of the plurality of first electrodes within a range of ±5°.

### Claim 3 (depends on 1)

The liquid crystal display device according to claim 1, wherein the first substrate is positioned at a side of the liquid crystal display panel.

### Claim 4

A liquid crystal display device having a liquid crystal lens arranged on a liquid crystal display panel,
wherein the liquid crystal display panel includes pixels each having a red sub-pixel, a green sub-pixel, and a blue sub-pixel arranged in a first direction, which are provided in the first direction at first intervals, and further arranged in a second direction orthogonal to the first direction at second intervals;
the liquid crystal lens is formed by interposing a liquid crystal between a first substrate and a second substrate;
the first substrate includes a plurality of first electrodes in stripes, extending in the first direction, and arranged in the second direction each at an interval twice as large as the second interval, each of the plurality of first electrodes in stripes having a same width;
the second substrate includes a plurality of second electrodes in stripes and a plurality of third electrodes in stripes, extending in the second direction, and arranged in the first direction at predetermined intervals, having the plurality of second electrodes arranged in the first direction at the interval twice as large as the first interval, each of the plurality of third electrodes in stripes having a width greater than a width of each of the plurality of second electrodes in stripes;
an initial alignment of liquid crystal molecules between the first and second substrates is in the second direction;
the plurality of second and the plurality of third electrodes are set to be at one potential, and a voltage is applied between the plurality of second electrodes and the plurality of first electrodes, and between the plurality of third electrodes and the plurality of first electrodes to allow a three-dimensional display; and
the plurality of first electrodes and the plurality of third electrodes are set to be at the one potential, and the voltage is applied between the plurality of first electrodes and the plurality of second electrodes, and between the third and second electrodes to allow a three-dimensional display.

### Claim 5 (depends on 4)

The liquid crystal display device according to claim 4,
wherein a rectangular display screen is provided;
the plurality of second and third electrodes are set to be at the one potential, and the voltage is applied between the plurality of second and first electrodes, and between the plurality of third and first electrodes to perform the three-dimensional display by selecting the display screen in a horizontal mode; and
the plurality of first and third electrodes are set to be at the one potential, and the voltage is applied between the plurality of first and second electrodes, and between the plurality of third and second electrodes to perform the three-dimensional display by selecting the display screen in a vertical mode.