Electronic device
An electronic device includes a cover layer, a light control panel, an optical fingerprint sensor and a first light source disposed at the same side of the cover layer. The first light source is for fingerprint sensing and capable of providing a light of which half-value angle is between −15° and 15°.
1. An electronic device, comprising:
a cover layer;
a light control panel;
an optical fingerprint sensor;
a first light source; and
an adjustable light transmittance layer disposed between the light control panel and the first light source and the adjustable light transmittance layer is in a diffusing state when the electronic device is in a display mode;
wherein the light control panel, the optical fingerprint sensor and the first light source are disposed at a same side of the cover layer and the first light source is for fingerprint sensing and capable of providing a light of which half-value angle is between −15° and 15°.
2. The electronic device of claim 1 , wherein at least a portion of the light enters the cover layer before entering the light control panel for a first time when reflected by a detected object.
3. The electronic device according to claim 1 , wherein a direction of the light has an oblique angle with respect to a normal direction of the cover layer.
4. The electronic device of claim 1 , wherein the first light source is turned off when the electronic device is not in a fingerprint sensing mode.
5. The electronic device of claim 4 , further comprising:
a second light source, wherein the second light source is turned on when the electronic device is in a display mode and the second light source is turned off when the electronic device is in the fingerprint sensing mode.
6. The electronic device according to claim 1 , further comprising an optical structure layer, wherein the light control panel is disposed on the optical structure layer.
7. The electronic device according to claim 6 , further comprising a light guide plate, wherein the optical structure layer is disposed on the light guide plate.
8. The electronic device according to claim 7 , further comprising a diffusing layer disposed between the optical structure layer and the light guide plate.
9. The electronic device of claim 1 , wherein the adjustable light transmittance layer is in a transparent state when the electronic device is in a fingerprint sensing mode.
10. The electronic device of claim 1 , wherein a direction of the light which provided by the first light source is parallel to a normal direction of the cover layer.
11. An electronic device, comprising:
a cover layer;
a backlight;
a light control panel disposed between the cover layer and the backlight;
an optical adjustable structure between the cover layer and the backlight;
an adjustable light transmittance layer disposed between the light control panel and the backlight and the adjustable light transmittance layer is in a diffusing state when the electronic device is in a display mode; and
an optical fingerprint sensor disposed between the cover layer and the backlight, and corresponding to the optical adjustable structure;
wherein the backlight provides a light for fingerprint sensing and the light is passing through the optical adjustable structure to become a collimated light and a half-value angle of the collimated light is between −15° and 15°.
12. The electronic device according to claim 11 , wherein the optical adjustable structure is disposed in the light control panel.
13. An electronic device, comprising:
a cover layer;
a light control panel;
a first light source; and
a second light source disposed adjacent to the first light source and providing a second light of which half-value angle is greater than −15° and 15°;
wherein the first light source is turned on and the second light source is turned off when the electronic device is in a narrow viewing angle state;
wherein the light control panel and the first light source are disposed at a same side of the cover layer and the first light source provides a first light of which half-value angle is between −15° and 15°.
14. The electronic device of claim 13 , wherein the first light source is turned off and the second light source is turned on when the electronic device is in a wide viewing angle state.
15. The electronic device according to claim 13 , wherein a direction of the first light which provided by the first light source is parallel to a normal direction of the cover layer.