Display device including sensor units and driving method thereof

Patent metadata

Field	Value
Publication number	US-9335853-B2
Application number	US-201213404714-A
Country	US
Kind code	B2
Filing date	Feb 24, 2012
Priority date	Aug 16, 2011
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

Exemplary embodiments of the present invention provide a display device including a plurality of sensing unit groups consisting of a plurality of sensing units and arranged in a matrix form. The display device further includes a plurality of gate lines connected to the plurality of sensing units included in a first sensing unit group, at least one sensing signal line connected to the plurality of sensing units, a scan driver transmitting gate signals to the gate lines, and a sensing signal processor processing a sensing signal transmitted by the sensing signal line. The gate lines transmit the gate signals according to different gate clock signals.

First claim

What is claimed is:

1. A display device, comprising:
a plurality of sensing unit groups, each sensing unit group comprising at least three sensing units that are arranged adjacently with each other;
a plurality of gate lines connected to a first plurality of sensing units of a first sensing unit group;
at least one sensing signal line connected to the first plurality of sensing units;
a scan driver configured to transmit gate signals to the plurality of gate lines, respectively; and
a sensing signal processor configured to process a sensing signal received from the at least one sensing signal line,
wherein the scan driver is configured to transmit the gate signals to the plurality of gate lines connected to the first plurality of sensing units according to different at least three gate clock signals,
wherein:
the first sensing unit group comprises a first sensing unit and a second sensing unit connected to different sub-gate lines;
the first sensing unit is configured to provide a first sensing signal during a first reset period and to provide a second signal during a second reset period after sensing light during a first sensing period; and
the second sensing unit is configured to provide a third sensing signal during a third reset period disposed within the first sensing period and to provide a fourth sensing signal during a fourth reset period after sensing light during a second sensing period.

2. The display device of claim 1 , wherein:
the first sensing unit group comprises four sensing units arranged in a quadrangular form; and
the plurality of gate lines comprises four gate lines connected to the four sensing units, respectively.

3. The display device of claim 2 , wherein:
the four gate lines are arranged two by two every sensing unit row.

4. The display device of claim 3 , wherein:
each sensing unit comprises a switching element connected to a gate line and a sensing signal line, and a sensing element and a capacitor connected to the switching element;
a control terminal of the sensing element is configured to receive a bias voltage; and
an input terminal of the sensing element and the capacitor are configured to receive a source voltage.

5. The display device of claim 4 , further comprising:
a backlight unit to radiate light to the plurality of sensing unit groups,
wherein the plurality of sensing units are configured to sense the radiated light from the backlight unit.

6. The display device of claim 1 , further comprising:
a backlight unit to radiate light to the plurality of sensing unit groups during a part of the first sensing period.

7. A display device, comprising:
a plurality of sensing unit groups comprising a first sensing unit group and a second sensing unit group, each sensing unit group comprising a plurality of sensing units;
a plurality of gate lines, one of which comprising a first sub-gate line and a second sub-gate line connected to each other;
at least one sensing signal line connected to the sensing units of the first sensing unit group and the second sensing unit group;
a scan driver configured to transmit gate signals to the plurality of gate lines, respectively; and
a sensing signal processor configured to process a sensing signal received from the at least one sensing signal line,
wherein the plurality of gate lines is configured to transmit the gate signals according to different gate clock signals from each other,
wherein the first sub-gate line is connected to one of the plurality of sensing units of the first sensing unit group, and
wherein the second sub-gate line is connect to one of the plurality of sensing units of the second sensing unit group.

8. The display device of claim 7 , wherein:
an arrangement of the plurality of sensing units of the first sensing unit group and an arrangement of the plurality of sensing units of the second sensing unit group are different from each other.

9. The display device of claim 8 , wherein:
the first sensing unit group and the second sensing unit group are alternately disposed in a column direction.

10. The display device of claim 8 , wherein:
a number of the at least one sensing signal line is at least two;
the first sensing unit group comprises a first sensing unit connected to the first sub-gate line;
the second sensing unit group comprises a second sensing unit connected to the second sub-gate line; and
the first sensing unit and the second sensing unit are connected to different sensing signal lines.

11. The display device of claim 10 , wherein:
the sensing signal processor is configured to receive sensing signals according to an arrangement order of the sensing signal lines in a row direction for sensing units connected to the same gate line and to rearrange data of the received sensing signals according to an arrangement order of the sensing units in a column direction.

12. The display device of claim 7 , wherein:
at least one of the plurality of sensing unit groups comprises four sensing units arranged in a quadrangular form;
the plurality of gate lines comprises four gate lines respectively connected with the four sensing units; and
two sensing unit rows are disposed between the first and second sub-gate lines.

13. A display device, comprising:
a plurality of sensing unit groups, each sensing unit group comprising at least three sensing units that are arranged adjacently with each other;
a plurality of gate lines connected to a first plurality of sensing units of a first sensing unit group;
at least one sensing signal line connected to the first plurality of sensing units;
a scan driver configured to transmit gate signals to the plurality of gate lines, respectively; and
a sensing signal processor configured to process a sensing signal received from the at least one sensing signal line,
wherein the scan driver is configured to transmit the gate signals to the plurality of gate lines connected to the first plurality of sensing units according to different at least three gate clock signals,
wherein:
each sensing unit comprises a switching element connected to a gate line and a sensing signal line, and a sensing element and a capacitor connected to the switching element;
a control terminal of the sensing element is connected to a bias voltage line; and
an input terminal of the sensing element and the capacitor are connected to a source voltage line, and wherein:
the plurality of gate lines comprises a first gate line and a second gate line connected to the switching elements of different sensing units of the first sensing unit group and adjacent to each other;
the first gate line and the second gate line extend in a row direction;
the bias voltage line is disposed in an upper layer than the first gate line and the second gate line; and
the bias voltage line comprises a dummy electrode disposed between the first gate line and the second gate line adjacent to the first gate line.

14. The display device of claim 13 , wherein the dummy electrode comprises:
a first dummy electrode disposed between the first gate line and an input terminal of the switching element; and
a second dummy electrode disposed between the second gate line and the input terminal of the switching element.

15. A display device, comprising:
a substrate;
a first gate line and a second gate line extending in a first direction and disposed on the substrate;
a first sensing unit and a second sensing unit that are arranged in the first direction; and
first and second sensing signal lines crossing the first and second gate lines and transmitting sensing signals from the first and seco

Assignees

• Park Kyung-Ho
• You Bong Hyun
• Bae Jae-Sung
• Lee Sang-Je
• Park Dong-Won
• Yoo Dong-Hyun
• Kim Jae-Won
• Samsung Display Co Ltd

Inventors

• Park Kyung-Ho
• You Bong Hyun
• Bae Jae-Sung
• Lee Sang-Je
• Park Dong-Won
• Yoo Dong-Hyun
• Kim Jae-Won

Classifications

• G09G3/34

  by control of light from an independent source · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G09G2370/24

  Keyboard-Video-Mouse [KVM] switch · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title