Display device

Patent metadata

Field	Value
Publication number	US-11573449-B2
Application number	US-202217578723-A
Country	US
Kind code	B2
Filing date	Jan 19, 2022
Priority date	Jan 20, 2021
Publication date	Feb 7, 2023
Grant date	Feb 7, 2023

Abstract

According to one embodiment, a display device comprises a collimating layer including first to third openings, first to third color filters overlaid on the first to third openings, respectively, a first sensor outputting a first detection signal corresponding to light made incident through the first opening and the first color filter, a second sensor outputting a second detection signal corresponding to light made incident through the second opening and the second color filter, and a third sensor outputting a third detection signal corresponding to light made incident through the third opening and the third color filter.

First claim

What is claimed is:

1. A display device comprising:
a first substrate comprising a first sensor, a second sensor, a third sensor, and a first collimating layer disposed in a display area including a pixel;
a second substrate comprising a first color filter of a first color, a second color filter of a second color, a third color filter of a third color, a second collimating layer, and a third collimating layer; and
a liquid crystal layer between the first substrate and the second substrate; wherein
the first collimating layer is located between the first to third sensors and the liquid crystal layer in a thickness direction,
the first to third color filters and the third collimating layer are located between the first collimating layer and the second collimating layer in the thickness direction,
the first collimating layer includes a first opening overlapping the first color filter, a second opening overlapping the second color filter, and a third opening overlapping the third color filter,
the second collimating layer includes a fourth opening overlapping the first color filter, a fifth opening overlapping the second color filter, and a sixth opening overlapping the third color filter,
the third collimating layer includes a seventh opening overlapping the first color filter, an eighth opening overlapping the second color filter, and a ninth opening overlapping the third color filter,
the first opening, the fourth opening, and the seventh opening are arranged in the thickness direction,
the second opening, the fifth opening, and the eighth opening are arranged in the thickness direction,
the third opening, the sixth opening, and the ninth opening are arranged in the thickness direction,
the first opening is smaller than both of the fourth opening and the seventh opening,
the second opening is smaller than both of the fifth opening and the eighth opening,
the third opening is smaller than both of the sixth opening and the ninth opening,
the first sensor is configured to output a first detection signal corresponding to light made incident through the first opening, the fourth opening, the seventh opening, and the first color filter;
the second sensor is configured to output a second detection signal corresponding to light made incident through the second opening, the fifth opening, the eighth opening, and the second color filter; and
the third sensor is configured to output a third detection signal corresponding to light made incident through the third opening, the sixth opening, the ninth opening, and the third color filter.

2. The display device of claim 1 , further comprising:
a fourth color filter of the first color overlaid on the pixel,
wherein
the first color filter is connected to the fourth color filter.

3. The display device of claim 1 , further comprising:
an infrared cut layer overlaid on at least one of the first opening, the second opening, and the third opening.

4. The display device of claim 1 , further comprising:
a pixel electrode formed of a transparent conductive material,
wherein
at least one of the first sensor, the second sensor, and the third sensor is overlaid on the pixel electrode.

5. The display device of claim 4 , wherein
at least one of the first opening, the second opening, and the third opening is overlaid on the pixel electrode.

6. The display device of claim 1 , wherein
the display area includes a plurality of first sub-pixels of the first color, a plurality of second sub-pixels of the second color, and a plurality of third sub-pixels of the third color, and
the third collimating layer includes a plurality of first pixel openings provided in the plurality of first sub-pixels, respectively, a plurality of second pixel openings provided in the plurality of second sub-pixels, respectively, and a plurality of third pixel openings provided in the plurality of third sub-pixels, respectively.

7. The display device of claim 6 , wherein
each of the first opening, the second opening, and the third opening is disposed between two adjacent openings of the plurality of third pixel openings.

8. The display device of claim 7 , further comprising:
a fourth color filter overlaid on the plurality of first pixel openings;
a fifth color filter overlaid on the plurality of second pixel openings; and
a sixth color filter overlaid on the plurality of third pixel openings,
wherein
the fourth color filter, the fifth color filter, and the sixth color filter are arranged in a first direction,
the fourth color filter and the fifth color filter are formed in a straight line in a second direction intersecting the first direction, and
the sixth color filter is formed intermittently in the second direction.

9. The display device of claim 1 , wherein
the first sensor, the second sensor, and the third sensor output the first detection signal, the second detection signal, and the third detection signal, respectively, in accordance with light emitted from the pixel and reflected on an object.

10. The display device of claim 1 , further comprising:
a controller detecting unevenness on an object, based on the first detection signal, the second detection signal, and the third detection signal.

11. The display device of claim 10 , wherein
the controller discriminates whether the object is a living body or a simulated body, based on a chronological change of each of the first detection signal, the second detection signal, and the third signal.

12. A display device comprising:
a first substrate comprising a sensor and a first collimating layer disposed in a display area including a pixel;
a second substrate comprising a second collimating layer and a third collimating layer;
a liquid crystal layer between the first substrate and the second substrate; and
a driver controlling the pixel and the sensor,
wherein
the first collimating layer is located between the sensor and the liquid crystal layer in a thickness direction,

the third collimating layer is located between the first collimating layer and the second collimating layer in the thickness direction,
the first collimating layer includes a first opening,
the second collimating layer includes a second opening,
the third collimating layer includes a third opening,
the first opening, the second opening, and the third opening are arranged in the thickness direction,
the first opening is smaller than both of the second opening and the third opening,
the sensor is configured to output a detection signal corresponding to reflected light emitted from the pixel, reflected on an object and incident on the sensor through the first opening, the second opening, and the third opening,
the pixel includes a first sub-pixel emitting light of a first color, a second sub-pixel emitting light of a second color, and a third sub-pixel emitting light of a third color,
the driver is configured to turn on the first sub-pixel during a first period and causing the sensor to output a first detection signal corresponding to reflected light of the light of the first color emitted from the first sub-pixel, to turn on the second sub-pixel during a second period and causing the sensor to output a second detection signal corresponding to reflected light of the light of the second color emitted from the second sub-pixel, and to turn on the third sub-pixel during a third period and causing the sensor to output a third detection signal corresponding to reflected light of the light of the third color emitted from the third sub-pixel.

13. The display device of claim 12 , further comprising:
an infrared cut layer overlaid on the sensor and not overlaid on the first sub-

Assignees

• Japan Display Inc

Inventors

• Ito Tomoyuki
• Matsunaga Kazuki
• Araki Shigesumi
• Mochizuki Kazuhide

Classifications

• G02F1/134309

  characterised by their geometrical arrangement · CPC title

• G06F3/0421

  by interrupting or reflecting a light beam, e.g. optical touch-screen · CPC title

• G02F2201/083

  infrared absorbing · CPC title

• G02F1/136209

  Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element · CPC title

• G06V40/1318

  using electro-optical elements or layers, e.g. electroluminescent sensing · CPC title