Light sensor and display apparatus having the same
First Claim
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1. A light sensor disposed on a substrate to sense light, the light sensor comprising:
- a light sensing layer disposed on the substrate to receive a light;
a source electrode disposed on the light sensing layer;
a drain electrode disposed on the light sensing layer and spaced apart from the source electrode;
an insulating layer disposed on the source electrode and the drain electrode; and
a gate electrode disposed on the insulating layer to face the light sensing layer,wherein an edge of the gate electrode directly overlaps with the light sensing layer at least in an area where the light sensing layer is overlapped with the source electrode and the drain electrode,wherein the source electrode comprises a plurality of first branch electrodes disposed in a first direction and a first body electrode connecting the first branch electrodes, the drain electrode comprises a plurality of second branch electrodes disposed in the first direction and a second body electrode connecting the second branch electrodes, and the first branch electrodes are alternately disposed with the second branch electrodes,wherein the gate electrode comprises;
a contact portion disposed perpendicular to the first direction;
a first end extending in the first direction and crossing the first branch electrodes; and
a second end disposed parallel to the first end and crossing the second branch electrodes, andwherein the light sensing layer comprises a third end and a fourth end that are disposed substantially parallel to the first end and the second end, respectively.
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Abstract
In a display apparatus, a light sensor of a display includes a light sensing layer, a source electrode, a drain electrode, an insulating layer, and a gate electrode to sense light from an external source. The light sensing layer is disposed on the substrate to sense light, and the source and drain electrodes are disposed on the light sensing layer and are covered by the insulating layer. The gate electrode is disposed on the insulating layer. An edge of the gate electrode is disposed on the light sensing layer at least in an area where the light sensing layer is overlapped with the source and drain electrodes.
14 Citations
18 Claims
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1. A light sensor disposed on a substrate to sense light, the light sensor comprising:
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a light sensing layer disposed on the substrate to receive a light; a source electrode disposed on the light sensing layer; a drain electrode disposed on the light sensing layer and spaced apart from the source electrode; an insulating layer disposed on the source electrode and the drain electrode; and a gate electrode disposed on the insulating layer to face the light sensing layer, wherein an edge of the gate electrode directly overlaps with the light sensing layer at least in an area where the light sensing layer is overlapped with the source electrode and the drain electrode, wherein the source electrode comprises a plurality of first branch electrodes disposed in a first direction and a first body electrode connecting the first branch electrodes, the drain electrode comprises a plurality of second branch electrodes disposed in the first direction and a second body electrode connecting the second branch electrodes, and the first branch electrodes are alternately disposed with the second branch electrodes, wherein the gate electrode comprises; a contact portion disposed perpendicular to the first direction; a first end extending in the first direction and crossing the first branch electrodes; and a second end disposed parallel to the first end and crossing the second branch electrodes, and wherein the light sensing layer comprises a third end and a fourth end that are disposed substantially parallel to the first end and the second end, respectively. - View Dependent Claims (2, 3, 4, 5)
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6. A display apparatus, comprising:
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a display panel comprising a first substrate and a second substrate facing the first substrate to display an image; and a plurality of light sensors to sense light, wherein each of the light sensors comprises; a light sensing layer disposed on the first substrate or the second substrate to receive the light; a source electrode disposed on the light sensing layer; a drain electrode disposed on the light sensing layer and spaced apart from the source electrode; an insulating layer disposed on the source electrode and the drain electrode; and a gate electrode disposed on the insulating layer to face the light sensing layer, and wherein an edge of the gate electrode directly overlaps with the light sensing layer at least in an area where the light sensing layer is overlapped with the source electrode and the drain electrode, wherein the source electrode comprises a plurality of first branch electrodes disposed in a first direction and a first body electrode connecting the first branch electrodes, the drain electrode comprises a plurality of second branch electrodes disposed in the first direction and a second body electrode connecting the second branch electrodes, and the first branch electrodes are alternately disposed with the second branch electrodes, wherein the gate electrode comprises; a contact portion disposed perpendicular to the first direction; a first end extending in the first direction and crossing the first branch electrodes; and a second end disposed parallel to the first end and crossing the second branch electrodes, and wherein the light sensing layer comprises a third end and a fourth end that are disposed substantially parallel to the first end and the second end, respectively. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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15. A display apparatus, comprising:
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a display panel to display an image, the display panel comprising; a first substrate comprising a plurality of pixels; and a second substrate comprising; a first sensor to sense a first light comprising an infrared wavelength; and a second sensor to sense a second light comprising a visible wavelength; and a backlight unit disposed adjacent to the display panel to provide a white light to the first substrate, wherein each of the first sensors comprises; a light sensing layer to receive the first light or the second light; a source electrode disposed on the light sensing layer; a drain electrode disposed on the light sensing layer and spaced apart from the source electrode; an insulating layer disposed on the source electrode and the drain electrode; and a gate electrode disposed on the insulating layer to face the light sensing layer, and wherein an edge of the gate electrode is disposed on the light sensing layer at least in an area where the light sensing layer is overlapped with the source electrode and the drain electrode, wherein the source electrode comprises a plurality of first branch electrodes disposed in a first direction and a first body electrode connecting the first branch electrodes, the drain electrode comprises a plurality of second branch electrodes disposed in the first direction and a second body electrode connecting the second branch electrodes, and the first branch electrodes are alternately disposed with the second branch electrodes, wherein the gate electrode comprises; a contact portion disposed perpendicular to the first direction; a first end extending in the first direction and crossing the first branch electrodes; and a second end disposed parallel to the first end and crossing the second branch electrodes, and wherein the light sensing layer comprises a third end and a fourth end that are disposed substantially parallel to the first end and the second end, respectively. - View Dependent Claims (16, 17, 18)
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Specification