Electronic device
An electronic device which has a narrow viewing angle state and a wide viewing angle state includes a diffuser layer, a panel and a light source. The panel is disposed on the diffuser layer. The light source provides a light passing through the panel. In the narrow viewing angle state, the light has a first relative light intensity and a second relative light intensity. The first relative light intensity is the strongest light intensity, and the second relative light intensity is 50% of the strongest light intensity. The first relative light intensity corresponds to an angle of 0°, the second relative light intensity corresponds to a half-value angle, and the half-value angle is between −15° and 15°.
1. An electronic device having a narrow viewing angle state and a wide viewing angle state, comprising:
a diffusing layer;
a panel disposed on the diffusing layer; and
a light source providing a light passing through the panel;
wherein in the narrow viewing angle state, the light has a first relative light intensity and a second relative light intensity, the first relative light intensity is the strongest light intensity, the second relative light intensity is 50% of the strongest light intensity, the first relative light intensity corresponds to an angle of 0°, the second relative light intensity corresponds to a half-value angle, and the half-value angle is between −15° and 15°,
wherein in the narrow angle state, a third relative light intensity at each angle between 20° and 60° or each angle between −20° and −60° is lower than 20% of the strongest light intensity.
2. The electronic device of claim 1 , further comprising:
an optical structure layer disposed under the panel.
3. The electronic device of claim 2 , wherein the optical structure layer includes a brightness enhancement film (BEF), an advanced structured optical composite (ASOC), a blue light transmitting mirror (BLT), or a combination thereof.
4. The electronic device of claim 2 , further comprising:
a light guide plate disposed under the panel, wherein the optical structure layer is disposed on the light guide plate.
5. The electronic device of claim 4 , wherein the diffusing layer disposed between the optical structure layer and the light guide plate.
6. The electronic device of claim 1 , further comprising an optical adjustable structure disposed on the diffusing layer.
7. The electronic device of claim 6 , wherein the optical adjustable structure is a privacy film.
8. The electronic device of claim 7 , wherein the privacy film is a grating.
9. The electronic device of claim 1 , wherein in the narrow angle state, a third relative light intensity at each angle between 20° and 60° or each angle between −20° and −60° is lower than 10% of the strongest light intensity.