Abstract: An electronic device including a first light emitting unit, a second light emitting unit, a first optical layer and a second optical layer is disclosed. The first light emitting unit emits a first light. The second light emitting unit emits a second light. At least one of the first light and the second light passes through the first optical layer. The second optical layer is overlapped with the first optical layer. The second optical layer is configured to scatter the first light emitted from the first light emitting unit. When the first light emitting unit emits the first light, the second light emitting unit selectively emits the second light.

Abstract: 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.

Abstract: A display device including a first light emitting unit, a second light emitting unit, a first optical layer and a second optical layer is disclosed. The first optical layer is disposed on at least one of the first light emitting unit and the second light emitting unit, and the first optical layer includes a collimating layer. The second optical layer is disposed on the first light emitting unit. The second optical layer is configured to scatter a first light emitted from the first light emitting unit but does not scatter a second light emitted from the second light emitting unit.

Abstract: A device for controlling different amounts of flushing water out of a toilet tank includes a casing having a through-hole defined therein and a pair of channels formed on both sides thereof; a shaft rotatably arranged in the casing with the front end extending out through the through-hole, the shaft being spring-loaded to define a rotationally initial position and so as to urge itself to return to the initial position after rotation; a disk secured to the shaft and having a pair of posts spaced apart at a predetermined angular distance; a reel having a peripheral recess for receiving a string, the string being fixedly attached to the reel; a pair of trigger members pivotally connected to the casing, each trigger member being pivotal to a first position in which one of the posts is retained by the trigger member after the shaft is rotated away from the initial position through a respective angle, and to a second position in which the post is released to return to the initial position; a pair of poles movable t