Backlighting apparatus for a keypad assembly
DCFirst Claim
Patent Images
1. A keypad assembly comprising:
- a) a dome configured to operatively engage a switch sensor;
b) a dome overlay guide adhered to the dome;
c) a key corresponding to the dome, and configured to operatively engage the dome;
d) a light emitting source configured to emit light;
e) a reflector layer configured to reflect light escaping the dome overlay guide;
f) wherein the dome overlay guide is configured to receive the emitted light and direct the received light toward the key.
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Abstract
A keypad assembly including a dome configured to operatively engage a switch sensor; a dome overlay guide operatively coupled by to the dome; a key corresponding to the dome and configured to operatively engage the dome; and a light emitting source, configured to emit light. The dome overlay guide is configured to receive the light emitted by the light emitting source and direct the received light toward the keys.
81 Citations
16 Claims
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1. A keypad assembly comprising:
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a) a dome configured to operatively engage a switch sensor; b) a dome overlay guide adhered to the dome; c) a key corresponding to the dome, and configured to operatively engage the dome; d) a light emitting source configured to emit light; e) a reflector layer configured to reflect light escaping the dome overlay guide; f) wherein the dome overlay guide is configured to receive the emitted light and direct the received light toward the key. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A keypad assembly comprising:
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a) a dome configured to operatively engage a switch sensor; b) a dome overlay guide adhered to the dome; c) a key corresponding to the dome, and configured to operatively engage the dome; d) a deflection web configured to seat the key; e) a side firing light emitting source configured to emit light; f) wherein the dome overlay guide is configured to receive the emitted light, and direct the received light toward the key; g) a reflector layer configured to reflect light escaping the dome overlay guide; and h) wherein an actuator is adjacent to a portion of an upper surface of the dome overlay guide. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method for providing backlighting for a keypad assembly, the keypad assembly comprising a printed circuit board having a switch sensor, a key corresponding to the switch sensor, a light emitting source configured to emit light, the method comprising:
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a) providing a dome corresponding to the switch sensor; b) adhering a light guide film to the dome; and c) securing the light guide film within the keypad assembly, wherein the light guide film is configured to receive the emitted light, and wherein the dome is configured to operatively engage the switch sensor; and d) adhering a reflector layer to the light guide film.
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Specification