Display device having optical sensing frame and method for detecting touch using the same
AssigneeLG Display Co., Ltd.
InventorsByung Chun Yu, Min-Ho Sohn, Hyung-Uk Jang
Life of this patent
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Abstract
A display device having an optical sensing frame, including a display panel; at least one waveguide unit arranged at two adjacent sides of the display panel, the waveguide unit having a stacked structure, the stacked structure including a light-emitting layer, and a light-receiving layer to receive reflected light, and a plurality of retroreflectors arranged at opposing sides of the waveguide unit.
Claims25
A display device having an optical sensing frame, comprising:
- a display panel;
- at least one waveguide unit arranged at two adjacent sides of the display panel, the waveguide unit having a stacked structure, the stacked structure including a light-emitting layer, and a light-receiving layer to receive reflected light;
- and
- a plurality of retroreflectors arranged at opposing sides of the waveguide unit.
A method for fabricating a display device having an optical sensing frame, comprising the steps of:
- providing a display panel;
- providing at least one waveguide unit arranged at two adjacent sides of the display panel, the waveguide unit having a stacked structure, the stacked structure including a light-emitting layer, and a light-receiving layer to receive reflected light;
- and
- providing a plurality of retroreflectors arranged at opposing sides of the waveguide unit.
A method for detecting touch of a display device with an optical sensing frame, the method comprising the steps of:
- preparing a display device having a waveguide unit arranged at adjacent two sides of the display panel, a retroreflector arranged at the remaining two sides of the display panel and a case to encase the display panel, the waveguide unit and the retroreflector, wherein the waveguide unit has a stacked structure including a light-emitting layer to emit infrared light and a light-receiving layer to receive the reflected light and thus detect touch;
- touching a portion of the display panel using an imput element;
- and
- allowing the waveguide unit to sense variations in reception amount of reflected light caused by the intervention of the input element in the touched portion and allowing the input element to block emitted light to prevent retro-reflection and thus detect presence of touch and the position thereof.
Dependencies are inferred from the claim text.