Electronic device
An electronic device has a narrow viewing angle state and a wide viewing angle state, and includes a panel and a light source providing 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, 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°. 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.
1. An electronic device having a narrow viewing angle state and a wide viewing angle state, comprising:
a panel; 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 a 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 viewing 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:
a brightness enhancement film disposed on the light source.
3. The electronic device of claim 2 , further comprising:
a light guide plate overlapped with the brightness enhancement film.
4. The electronic device of claim 3 , further comprising:
another light source disposed on one side of the light guide plate.
5. The electronic device of claim 4 , wherein the another light source is turned on when the electronic device is in the wide viewing angle state.
6. The electronic device of claim 3 , further comprising an optical structure layer overlapped with the light guide plate.
7. An electronic device having a narrow viewing angle state and a wide viewing angle state, comprising:
a transistor array;
a cover layer disposed on the transistor array; and
a light source providing a light passing through the transistor array;
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 a strongest light intensity, the second 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.
8. The electronic device of claim 7 , further comprising:
a brightness enhancement film disposed on the light source.
9. The electronic device of claim 8 , further comprising:
a light guide plate overlapped with the brightness enhancement film.
10. The electronic device of claim 9 , further comprising:
another light source disposed on one side of the light guide plate.
11. The electronic device of claim 10 , wherein the another light source is turned on when the electronic device is in the wide viewing angle state.