Display device with built-in optical image sensor
A display device with a built-in optical image sensor includes a display panel, a cover substrate, and an optical image sensor. The cover substrate has light transmissivity and covers the display panel. The optical image sensor is coupled to the display panel and senses an image of a body of a user using light reflected from the body of the user in contact with the cover substrate. The display panel includes a base substrate, a pixel portion, an encapsulation film, and a touch sensing layer. The touch sensing layer includes the touch electrode portion and is disposed on the encapsulation film covering a pixel portion. A plurality of pinholes are defined in at least one layer having light absorptivity or light reflectivity of the pixel portion. The plurality of pinholes overlap the optical image sensor. Further, openings overlapping the plurality of pinholes are defined in the touch electrode portion.
1. A display device with a built-in optical image sensor, comprising:
a display panel;
a cover substrate having light transmissivity and configured to cover the display panel; and
the optical image sensor coupled to the display panel and configured to sense an image of a body of a user using light reflected from the body of the user in contact with the cover substrate,
wherein the display panel includes:
a base substrate;
a pixel portion disposed on the base substrate;
an encapsulation film configured to cover the pixel portion; and
a touch sensing layer including a touch electrode portion and disposed on the encapsulation film to be located between the encapsulation film and the cover substrate, and
wherein a plurality of pinholes are defined in at least one layer of the pixel portion having light absorptivity or light reflectivity, the plurality of pinholes overlapping the optical image sensor, and wherein a plurality of openings overlapping the plurality of pinholes are defined in the touch electrode portion.
2. The display device of claim 1 , wherein the pixel portion includes:
a plurality of pixels disposed on the base substrate; and
a bank layer located between two adjacent pixels,
wherein the bank layer has the light absorptivity and the plurality of pinholes are defined in the bank layer.
3. The display device of claim 2 , wherein each of the plurality of pinholes passes through the bank layer in a thickness direction of the base substrate.
4. The display device of claim 1 , wherein:
the pixel portion includes a plurality of pixels disposed on the base substrate;
each of the plurality of pixels includes:
a driving transistor disposed on the base substrate;
an anode electrically connected to the driving transistor;
an organic light emitting layer disposed on the anode;
a cathode disposed on the organic light emitting layer; and
a light shielding layer interposed between the base substrate and the driving transistor and configured to block light traveling toward the driving transistor, wherein at least one of the plurality of pinholes is defined in the light shielding layer.
5. The display device of claim 4 , wherein:
the plurality of pixels are disposed in a plurality of pixel areas;
a non-pixel area is defined between two adjacent pixel areas among the plurality of pixel areas; and
the plurality of pinholes are defined in the light shielding layer at positions corresponding to the non-pixel area.
6. The display device of claim 4 , wherein:
the pixel portion includes a bank layer located between two adjacent pixels among the plurality of pixels; and
the bank layer has light transmissivity.
7. The display device of claim 1 , wherein:
the pixel portion includes a plurality of pixels disposed on the base substrate;
each of the plurality of pixels includes:
a driving transistor disposed on the base substrate;
an anode having light reflectivity and electrically coupled to the driving transistor;
an organic light emitting layer disposed on the anode; and
a cathode disposed on the organic light emitting layer, and
at least one of the plurality of pinholes is defined in the anode.
8. The display device of claim 7 , wherein:
the plurality of pixels are disposed in a plurality of pixel areas;
a non-pixel area is defined between two adjacent pixel areas among the plurality of pixel areas; and
the at least one of the plurality of pinholes is defined in the anode at a position corresponding to the non-pixel area.
9. The display device of claim 7 , wherein:
the pixel portion includes a bank layer located between two adjacent pixels among the plurality of pixels; and
the bank layer has light transmissivity.
10. The display device of claim 1 , wherein the touch electrode portion includes:
a touch electrode; and
a bridge configured to connect the touch electrode to another touch electrode adjacent to the touch electrode, wherein
the plurality of openings are defined in the touch electrode.
11. The display device of claim 10 , wherein the touch electrode has a characteristic of light reflectivity.
12. The display device of claim 1 , wherein:
the touch electrode portion includes a touch electrode with a mesh structure; and
each of the plurality of openings is defined as a shape in which a portion of the touch electrode is disconnected.
13. The display device of claim 1 , wherein the optical image sensor is opposite to the pixel portion by interposing the base substrate therebetween.
14. The display device of claim 1 , wherein the plurality of pinholes are arranged in a form of a matrix having a row direction and a column direction.
15. The display device of claim 1 , wherein the touch sensing layer is disposed on the encapsulation film, the touch sensing layer in contact with the encapsulation film.
16. The display device of claim 1 , wherein each of the plurality of openings overlaps one of the plurality of pinholes.