Abstract: An asymmetric half-bridge converter is provided. The asymmetric half-bridge converter includes a switch circuit, a resonance tank, a current sensor, and a controller. The current sensor senses a waveform of a resonance current flowing through the resonance tank to generate a sensing result. The controller determines the sensing result. When the sensing result indicates that an ending current value of a primary resonance waveform of the resonance current is greater than a predetermined value, the controller performs a first switching operation on the switch circuit. When the sensing result indicates that the ending current value of the primary resonance waveform is less than or equal to the predetermined value, the controller performs a second switching operation on the switch circuit.

Abstract: A light guiding plate includes a light emitting surface, a structural surface, a light incident surface and a plurality of trench structures. The structural surface is opposite to the light emitting surface. The light incident surface connects between the light emitting surface and the structural surface. The trench structures are formed at intervals on the structural surface. Each of the trench structures includes a first surface and a second surface. The first surface connects with the structural surface. A first angle included between the first surface and the structural surface ranges from 110 degrees to 130 degrees. The second surface connects with the structural surface. The second surface connects with the first surface to form a trench axis. The first surface of each of the trench structures is closer to the light incident surface relative to the corresponding second surface.

Abstract: An optical film includes a first substrate and a second substrate. A plurality of first particles are doped and dispersed in the first substrate, and a plurality of second particles are doped and dispersed in the second substrate. The first substrate has a top surface and a bottom surface, wherein the top surface is a flat surface and the bottom surface is a rough surface. The second substrate is attached to the bottom surface of the first substrate and the second substrate has flat surfaces.