Backlit finger feature recognition structure
A backlit finger feature recognition structure includes a feature sensor configured to sense a finger feature, a light guide member disposed surrounding the finger sensor, a circuit board assembly disposed corresponding to the light guide member and electrically connected to a lower side of the feature sensor, and an illuminant electrically connected to the circuit board assembly, wherein in a stacking direction, the illuminant does not overlap the feature sensor, and the light guide member guides light emitted from the illuminant to be emitted along the stacking direction.
1 . A backlit finger feature recognition structure, comprising:
a feature sensor configured to sense a finger feature;
a light guide member disposed surrounding the feature sensor;
a circuit board assembly disposed corresponding to the light guide member and electrically connected to a lower side of the feature sensor; and
an illuminant electrically connected to the circuit board assembly,
wherein in a stacking direction, the illuminant does not overlap the feature sensor, and the light guide member guides light emitted from the illuminant to be emitted along the stacking direction;
wherein the feature sensor has a non-quadrilateral cut shape to form a retreat space between the light guide member and the feature sensor, and the illuminant is located in the retreat space.
2 . The backlit finger feature recognition structure of claim 1 , wherein the illuminant and the feature sensor are located at a same side of the circuit board assembly.
3 . The backlit finger feature recognition structure of claim 1 , wherein the light guide member comprises a plate body with an opening; the plate body is disposed on the circuit board assembly; the feature sensor and the illuminant are accommodated in the opening.
4 . The backlit finger feature recognition structure of claim 3 , wherein the opening comprises a first receiving slot and a second receiving slot; the first receiving slot is configured to accommodate the feature sensor; the second receiving slot extends from the first receiving slot and is configured to accommodate the illuminant.
5 . The backlit finger feature recognition structure of claim 3 , wherein the light guide member is constituted by a plurality of detachable plate bodies.
6 . The backlit finger feature recognition structure of claim 1 , wherein the light guide member comprises a first plate body and a second plate body respectively located under and above the circuit board assembly; the first plate body and the second plate body respectively have a first opening and a second opening; the first opening allows a portion of the circuit board assembly to extend therethrough to outside of the light guide member; the feature sensor and the illuminant are accommodated in the second opening.
7 . The backlit finger feature recognition structure of claim 6 , wherein the first plate body and the second plate body constitute the light guide member of an integral structure or a detachable structure.
8 . The backlit finger feature recognition structure of claim 1 , further comprising an additional illuminant electrically connected to the circuit board assembly, wherein the additional illuminant and the illuminant are located at a same surface or different surfaces of the circuit board assembly.
9 . The backlit finger feature recognition structure of claim 1 , wherein the circuit board assembly is a flex-rigid composite circuit board including a flexible printed circuit board and at least one rigid circuit board; the feature sensor and the illuminant are disposed on and electrically connected to the at least one rigid circuit board.
10 . The backlit finger feature recognition structure of claim 1 , further comprising a base holder with an accommodation space and a slot; the accommodation space is configured to accommodate the feature sensor, the light guide member, the circuit board assembly, and the illuminant; the slot communicates with the accommodation space and allows the circuit board assembly to extend from the slot to outside of the base holder.
11 . The backlit finger feature recognition structure of claim 10 , further comprising a cover disposed on the base holder to cover the accommodation space; the cover has a light-permeable portion; in a light-output direction, the light guide member at least partially overlaps the light-permeable portion.
12 . The backlit finger feature recognition structure of claim 1 , further comprising an optical film disposed on a light-exit surface of the light guide member.
13 . The backlit finger feature recognition structure of claim 1 , further comprising a plurality of light-exit dots disposed at a side of the light guide member opposite to a light-exit surface of the light guide member.
14 . The backlit finger feature recognition structure of claim 1 , wherein the illuminant is at least partially located in a region defined by extending lines of adjacent outmost sides of the feature sensor.
15 . A backlit finger feature recognition structure, comprising:
a feature sensor configured to sense a finger feature;
a light guide member disposed surrounding the feature sensor;
a circuit board assembly disposed corresponding to the light guide member and electrically connected to a lower side of the feature sensor; and
an illuminant electrically connected to the circuit board assembly,
wherein in a plane view, the illuminant is located between the light guide member and the feature sensor, and the light guide member guides light emitted from the illuminant to be emitted upward;
wherein the feature sensor has a non-quadrilateral cut shape to form a retreat space between the light guide member and the feature sensor, and the illuminant is located in the retreat space.
16 . The backlit finger feature recognition structure of claim 15 , wherein the illuminant is at least partially located in a region defined by extending lines of adjacent outmost sides of the feature sensor.
17 . The backlit finger feature recognition structure of claim 15 , wherein the illuminant and the feature sensor are located at a same side of the circuit board assembly.
18 . The backlit finger feature recognition structure of claim 15 , wherein the light guide member comprises a plate body with an opening; the plate body is disposed on the circuit board assembly; the feature sensor and the illuminant are accommodated in the opening.
19 . The backlit finger feature recognition structure of claim 18 , wherein the light guide member is constituted by a plurality of detachable plate bodies.
20 . A backlit finger feature recognition structure, comprising:
a feature sensor configured to sense a finger feature;
a light guide member disposed surrounding the feature sensor;
a circuit board assembly disposed corresponding to the light guide member and electrically connected to a lower side of the feature sensor; and
an illuminant electrically connected to the circuit board assembly,
wherein in a stacking direction, the illuminant does not overlap the feature sensor, and the light guide member guides light emitted from the illuminant to be emitted along the stacking direction;
wherein the light guide member comprises a first plate body and a second plate body respectively located under and above the circuit board assembly; the first plate body and the second plate body respectively have a first opening and a second opening; the first opening allows a portion of the circuit board assembly to extend therethrough to outside of the light guide member; the feature sensor and the illuminant are accommodated in the second opening.