Backlighting assembly for a keypad
AssigneeResearch In Motion Limited
InventorChao CHEN
Life of this patent
Estimating the term…
Abstract
A backlighting assembly for use in a keypad assembly. The backlighting assembly includes at least one light emitting source configured to emit light; and a light guide assembly configured to receive the emitted light and direct the light toward the at least one key. The light guide assembly includes both a light guide film and a light guide frame for directing light from the light source toward the key(s).
Claims20
A keypad assembly comprising:
- (a) at least one key;
- (b) at least one light emitting source configured to emit light;
- (c) a light guide assembly configured to receive the emitted light and direct the light toward the at least one key;
- and
- (d) wherein the light guide assembly comprises:
- (i) a light guide film, and
- (ii) a light guide frame.
A backlighting assembly for a keypad assembly having at least one key, the backlighting assembly comprising:
- (a) at least one side firing light emitting source configured to emit light;
- (b) a light guide assembly configured to receive the emitted light and direct the light toward the at least one key;
- and
- (c) wherein the light guide assembly comprises:
- (i) a light guide film, and
- (ii) a light guide frame.
A method for providing backlighting for a keypad assembly having at least one key, the method comprising:
- (a) providing a keypad assembly having at least one light emitting source, wherein the light emitting source is configured to emit light;
- (b) providing a light guide assembly configured to receive the emitted light and to direct the received light toward the at least one key, wherein the light guide assembly comprises a light guide film and a light guide frame;
- and
- (c) causing the light emitting source to emit light.
Dependencies are inferred from the claim text.