# US 2013/0155034 A1 · Two-screen display device

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- Number: US 2013/0155034 A1
- Document ID: US20130155034A1
- Status: Published application
- Kind: A1
- Application number: 13/566,443
- Filed: 2012-08-03
- Published: 2013-06-20
- Earliest claimed: 2011-12-14
- Assignees: Mitsubishi Electric Corporation
- Inventors: Akio NAKAYAMA; Yoshimitsu ISHIKAWA
- Web page: https://patentgrep.com/patent/US20130155034A1

## CPC

- G09G 3/3614: {Control of polarity reversal in general}
- G02B 30/27: involving lenticular arrays
- G02B 30/30: involving parallax barriers
- G02F 1/1323: {Arrangements for providing a switchable viewing angle}
- G02F 1/1343: Electrodes {(reflective electrodes G02F1/133553)}
- G09F 9/35: being liquid crystals (G09F9/302 takes precedence; liquid crystal materials C09K19/00; {liquid crystal panels comprising a number of electrodes in a single cell per se G02F1/13})
- G09F 19/14: displaying different signs depending upon the view-point of the observer
- G09G 3/3648: {using an active matrix (G09G3/367 - G09G3/3696 take precedence)}
- H04N 13/31: using parallax barriers
- G02F 1/134345: {Subdivided pixels, e.g. for grey scale or redundancy}
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- 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
- G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A two-screen display device, in which an increase of production cost can be suppressed while the same resolution as an image of a usual (one-screen display) device is maintained, is provided. In a liquid crystal display panel of the two-screen display device, each of a first sub-pixel for first image and a second sub-pixel for second image has an aspect ratio of about 6:1. A source line supplies an image signal to both the first sub-pixel and the second sub-pixel. Each row of the sub-pixel includes a gate line (first gate line) that drives the first sub-pixel and a gate line (second gate line) that drives the second sub-pixel. An opening of a parallax barrier is disposed in a region between the first sub-pixel and the second sub-pixel.

## Claims

### Claim 1

A two-screen display device comprising:
a first sub-pixel that is of a sub-pixel for a first image and a second sub-pixel that is of a sub-pixel for a second image, the first sub-pixel and the second sub-pixel being adjacent to each other, each of the first sub-pixel and the second sub-pixel having an aspect ratio of about 6:1;
a source line that supplies an image signal to both said first sub-pixel and said second sub-pixel;
a first switching element that is connected between said source line and said first sub-pixel;
a second switching element that is connected between said source line and said second sub-pixel;
a first gate line that is of a gate line supplying a driving signal to a control electrode of said first switching element to drive said first sub-pixel;
a second gate line that is of a gate line supplying a driving signal to a control electrode of said second switching element to drive said second sub-pixel;
a display region in which a plurality of sets of said first sub-pixel and said second sub-pixel are arrayed into a two-dimensional matrix shape; and
a parallax barrier that is of a light shielding film provided on said display region, said parallax barrier including a plurality of openings arrayed in a region between said first sub-pixel and said second sub-pixel, which are adjacent to each other.

### Claim 2 (depends on 1)

The two-screen display device according to claim 1, wherein
said source line extends between said first sub-pixel and said second sub-pixel, to which the source line supplies a image signal,
each of said first gate line and said second gate line extends in a direction intersecting said source line, and said first gate line and said second gate line are disposed while said first sub-pixel driven by the first gate line and said second sub-pixel driven by the second gate line are interposed between the first gate line and the second gate line.

### Claim 3 (depends on 1)

The two-screen display device according to claim 1, wherein
each of said first sub-pixel and said second sub-pixel produces one of red, green, and blue colors, and
the color produced by each of said first sub-pixel and said second sub-pixel is arrayed in said display region while regularly changing in each sub-pixel in an extending direction of said gate line.

### Claim 4 (depends on 1)

The two-screen display device according to claim 1, wherein
each of said first sub-pixel and said second sub-pixel produces one of red, green, and blue colors,
the color produced by each of said first sub-pixel and said second sub-pixel is regularly arrayed in said display region in an extending direction of said gate line, and said first sub-pixel and said second sub-pixel, which receive the image signal from said identical source line, produce an identical color light.

### Claim 5 (depends on 1)

The two-screen display device according to claim 1, wherein
a row in which said opening of said parallax barrier is disposed in a region between said first sub-pixel and said second sub-pixel, which receive the image signal from the identical source line and
a row in which said opening of said parallax barrier is disposed in a region between said first sub-pixel and said second sub-pixel, which receive the image signal from the different source lines, are alternately disposed in said display region.

### Claim 6 (depends on 1)

The two-screen display device according to claim 1, wherein
all said openings on said display region in said parallax barrier are disposed in a region between said first sub-pixel and said second sub-pixel, which receive the image signal from the identical source line.

### Claim 7 (depends on 5)

The two-screen display device according to claim 5, wherein
a polarity of said image signal supplied to said source line is inverted in each of said gate line, and reversed with respect to a image signal of said adjacent source line.

### Claim 8 (depends on 5)

The two-screen display device according to claim 5, wherein
a polarity of said image signal supplied to said source line is inverted in each set of said first gate line and said second gate line, and reversed with respect to an image signal of said adjacent source line.

### Claim 9 (depends on 1)

The two-screen display device according to claim 1, wherein
said parallax barrier is made of metal or black resin.

### Claim 10

A two-screen display device comprising:
a first sub-pixel that is of a sub-pixel for a first image and a second sub-pixel that is of a sub-pixel for a second image, the first sub-pixel and the second sub-pixel being adjacent to each other, each of the first sub-pixel and the second sub-pixel having an aspect ratio of about 3:2;
a first source line that is of a source line supplying an image signal to said first sub-pixel;
a second source line that is of a source line supplying an image signal to said second sub-pixel;
a first switching element that is connected between said first source line and said first sub-pixel;
a second switching element that is connected between said second source line and said second sub-pixel;
a gate line that supplies a driving signal to control electrodes of said first switching element and said second switching element to drive said first sub-pixel and said second sub-pixel;
a display region in which a plurality of sets of said first sub-pixel and said second sub-pixel are arrayed into a two-dimensional matrix shape; and
a parallax barrier that is of a light shielding film provided on said display region, said parallax barrier including a plurality of openings arrayed in a region between said first sub-pixel and said second sub-pixel, which are adjacent to each other.

### Claim 11 (depends on 10)

The two-screen display device according to claim 10, wherein
each of said first sub-pixel and said second sub-pixel produces one of red, green, and blue colors, and
the color produced by each of said first sub-pixel and said second sub-pixel is arrayed in said display region while regularly changing in each sub-pixel in an extending direction of said gate line.

### Claim 12 (depends on 10)

The two-screen display device according to claim 10, wherein
said openings of said parallax barrier are arrayed in a zigzag manner in said display region while said first sub-pixel and said second sub-pixel are alternately disposed in an extending direction of said source line.

### Claim 13 (depends on 10)

The two-screen display device according to claim 10, wherein
two sub-pixels adjacent to each other in an extending direction of said source line are disposed between a gate line that drives one of the two sub-pixels and a gate line that drives the other in said display region.

### Claim 14 (depends on 10)

The two-screen display device according to claim 10, wherein
said parallax barrier is made of metal or black resin.

### Claim 15

A two-screen display device comprising:
a first sub-pixel that is of a sub-pixel for a first image and a second sub-pixel that is of a sub-pixel for a second image, the first sub-pixel and the second sub-pixel being adjacent to each other, each of the first sub-pixel and the second sub-pixel having an aspect ratio of about 3:2;
a source line that supplies an image signal to both said first sub-pixel and said second sub-pixel;
a first switching element that is connected between said source line and said first sub-pixel;
a second switching element that is connected between said source line and said second sub-pixel;
a first gate line that is of a gate line supplying a driving signal to a control electrode of said first switching element to drive said first sub-pixel;
a second gate line that is of a gate line supplying a driving signal to a control electrode of said second switching element to drive said second sub-pixel;
a display region in which a plurality of sets of said first sub-pixel and said second sub-pixel are arrayed into a two-dimensional matrix shape; and
a parallax barrier that is of a light shielding film provided on said display region, said parallax barrier including a plurality of openings arrayed in a region between said first sub-pixel and said second sub-pixel, which are adjacent to each other.

### Claim 16 (depends on 15)

The two-screen display device according to claim 15, wherein
said source line extends between said first sub-pixel and said second sub-pixel, to which the source line supplies a image signal,
each of said first gate line and said second gate line extends in a direction intersecting said source line, and said first gate line and said second gate line are disposed while said first sub-pixel driven by the first gate line and said second sub-pixel driven by the second gate line are interposed between the first gate line and the second gate line.

### Claim 17 (depends on 15)

The two-screen display device according to claim 15, wherein
each of said first sub-pixel and said second sub-pixel produces one of red, green, and blue colors, and
the color produced by each of said first sub-pixel and said second sub-pixel is arrayed in said display region while regularly changing in each sub-pixel in an extending direction of said gate line.

### Claim 18 (depends on 15)

The two-screen display device according to claim 15, wherein
a row in which said opening of said parallax barrier is disposed in a region between said first sub-pixel and said second sub-pixel, which receive the image signal from the identical source line and
a row in which said opening of said parallax barrier is disposed in a region between said first sub-pixel and said second sub-pixel, which receive the image signal from the different source lines, are alternately disposed in said display region.

### Claim 19 (depends on 18)

The two-screen display device according to claim 18, wherein
a polarity of said image signal supplied to said source line is inverted in each of said gate line, and reversed with respect to a image signal of said adjacent source line.

### Claim 20 (depends on 18)

The two-screen display device according to claim 18, wherein
a polarity of said image signal supplied to said source line is inverted in each set of said first gate line and said second gate line, and reversed with respect to an image signal of said adjacent source line.

### Claim 21 (depends on 15)

The two-screen display device according to claim 15, wherein
said parallax barrier is made of metal or black resin.