Abstract: The present disclosure discloses a backlight module, which includes a light guide plate and at least one light emitting unit. The light guide plate includes a first side and a second side opposite to each other, at least one accommodating portion and at least one light guide structure. The accommodating portion is adjacent to the first side and has an incident surface faced toward the second side. The light guide structure is disposed between the accommodating portion and the second side, and the light guide structure further comprises a first reflective surface and a second reflective surface. The first reflective surface is toward the first side and close to the accommodating portion. The second reflective surface is adjacent to the first reflective surface, and the second reflective surface is toward the first side and away from the accommodating portion. The light emitting unit is disposed in the accommodating portion.

Abstract: A keypad structure with multi-mode display function includes: a keypad layer having a plurality of key pressing positions; and a plurality of indicating unit in installed a multilayer form and under the keypad layer, and each having a light emitting element; and a light guide element corresponding to the light emitting element. A surface of the light guide element has a symbol layer, and the symbol layer includes a plurality of symbols at the key pressing positions, such that the keypad structure can display indicating symbols of different functions at a single key pressing position.

Abstract: A key module with energy storage function includes a transparent key unit, a sun cell, and an elastic unit. The transparent key unit has a plurality of transparent microstructures. The sun cell is disposed under a bottom side of the transparent key unit, and the sun cell has a light-receiving face facing the transparent key unit. The elastic unit is disposed under a bottom side of the sun cell. Therefore, the transparent microstructures of the transparent key unit guide and transmit external light sources onto the light-receiving face of the sun cell in order to increase light source on the light-receiving face.

Abstract: A multi-functional keypad module for a mobile phone includes a circuit board, a light-emitting element, a soft light-guiding rubber layer, an optical touch layer, and a key layer. The soft light-guiding rubber layer is provided on the circuit board and has a plurality of protrusions each corresponding to the circuit board; thereby a feedback feeling from a pressing action and a light-guiding effect can be obtained. The optical touch layer is provided on the soft light-guiding rubber layer, in order to continue the optically enhanced touch-control and the feedback feeling. The key layer is provided on the optical touch layer, with a plurality of keys respectively corresponding to one of the protrusion, thereby completes and achieves the optically enhanced touch-control effect and feedback feeling. Via the above arrangement, the keypad module of a mobile phone has multiple functions of light guiding, touch-control, and feedback feeling from a pressing action.