Sensing device and method of sensing a light by using the same
First Claim
Patent Images
1. A sensing device comprising:
- a lower panel;
an upper panel facing the lower panel; and
a liquid crystal layer disposed between the lower panel and the upper panel, the upper panel including an upper substrate having a first surface facing a direction where an object to be sensed would be positioned and an opposite surface facing the liquid crystal layer, both the first surface and the opposite surface being planarized;
a plurality of infrared ray sensors formed in the upper panel on the opposite surface, each infrared ray sensor including a visible ray blocking film contacting the opposite surface, an insulating layer covering and contacting the visible ray blocking film, an active layer disposed on and contacting the insulating layer, a source and drain electrode, each contacting the active layer, the insulating layer and the opposite surface, a gate insulating layer disposed on the active layer and the source and drain electrodes and contacting the opposite surface, and a gate electrode disposed under the active layer and gate insulating layer; and
a plurality of visible ray sensors formed in the upper panel on the opposite surface,wherein the active layer includes a material capable of sensing both visible rays and infrared rays, and the material includes at least one of amorphous germanium and micro-crystalline silicon.
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Abstract
In a sensing device and a method for sending a light by using the same, the sensing device includes: a lower panel; an upper panel facing the lower panel; a liquid crystal layer disposed between the lower panel and the upper panel; an infrared ray sensor formed in at least one of the lower panel and the upper panel; and a visible ray sensor formed in at least one of the lower panel and the upper panel. The sensing device simultaneously includes the infrared ray sensor and the visible ray sensor such that a touch sensing function or an image sensing function having high reliability may be realized.
13 Citations
25 Claims
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1. A sensing device comprising:
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a lower panel; an upper panel facing the lower panel; and a liquid crystal layer disposed between the lower panel and the upper panel, the upper panel including an upper substrate having a first surface facing a direction where an object to be sensed would be positioned and an opposite surface facing the liquid crystal layer, both the first surface and the opposite surface being planarized;
a plurality of infrared ray sensors formed in the upper panel on the opposite surface, each infrared ray sensor including a visible ray blocking film contacting the opposite surface, an insulating layer covering and contacting the visible ray blocking film, an active layer disposed on and contacting the insulating layer, a source and drain electrode, each contacting the active layer, the insulating layer and the opposite surface, a gate insulating layer disposed on the active layer and the source and drain electrodes and contacting the opposite surface, and a gate electrode disposed under the active layer and gate insulating layer; anda plurality of visible ray sensors formed in the upper panel on the opposite surface, wherein the active layer includes a material capable of sensing both visible rays and infrared rays, and the material includes at least one of amorphous germanium and micro-crystalline silicon. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A sensing device comprising:
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a lower panel including a lower substrate and a pixel transistor disposed on the lower substrate; a liquid crystal layer disposed on the lower panel; and an upper panel disposed on the liquid crystal layer and including an upper substrate having a first surface facing a direction where an object to be sensed would be positioned and an opposite surface facing the liquid crystal layer, an infrared ray sensor, a visible ray sensor, and a readout transistor connected to the infrared ray sensor or the visible ray sensor for transmitting a detection signal to a readout line, wherein both the first surface and the opposite surface are planarized, and wherein the infrared ray sensor includes a visible ray blocking film contacting the opposite surface, an insulating layer covering and contacting the visible ray blocking film, an active layer disposed on and contacting the insulating layer, a source and drain electrode, each contacting the active layer, the insulating layer and the opposite surface, a gate insulating layer on the active layer and the source and drain electrodes, and contacting the opposite surface, and a gate electrode disposed between the active layer and the liquid crystal layer, wherein the active layer includes a material capable of sensing both visible rays and infrared rays, and the material includes at least one of amorphous germanium and micro-crystalline silicon. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for sensing light by using a sensing device, comprising:
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providing a sensing device including an upper substrate having a first surface facing an object to be sensed and a second surface opposite the first surface, an infrared ray sensor and a visible ray sensor, the infrared ray sensor including a visible ray blocking film contacting the opposite surface, an insulating layer covering and contacting the visible ray blocking film, an active layer disposed on and contacting the insulating layer, a source and drain electrode, each contacting the active layer, the insulating layer and the opposite surface, a gate insulating layer disposed on the active layer and the source and drain electrodes and contacting the opposite surface, and a gate electrode disposed under the active layer and gate insulating layer, wherein both the first surface and the second surface are planarized, and wherein the active layer includes a material capable of sensing both visible rays and infrared rays, and the material includes at least one of amorphous germanium and micro-crystalline silicon; emitting an infrared ray and a visible ray from the sensing device; disposing the object close to the upper substrate of the sensing device; and sensing the infrared ray or the visible ray reflected by the object through the infrared ray sensor or the visible ray sensor, thereby obtaining information of the object. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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Specification