Information handling system keyboard embedded micro LED backlight
Information handling system keyboard illumination is provided with micro LEDs disposed below keyboard keys to direct illumination at each key individually. The micro LEDs may be integrated at a bottom surface of a support plate below a keyboard membrane, on top of the support plate within an opening of the membrane or in a spacer layer of the membrane between circuit layers. A diffuser disposed between the micro LED helps to diffuse illumination directed at the key for a more even icon illumination. The diffuser may be integrated with the membrane at an upper circuit layer or over a structure disposed over the micro LED.
1 . A keyboard comprising:
a support plate;
a membrane disposed on the support plate, the membrane having a flexible material with an upper and lower circuit layer configured to detect a key touch;
plural keys disposed over the membrane and operable to accept an end user touch to translate the touch as an input at the membrane;
an LED disposed under each key between the upper and lower circuit layer; and
a diffuser integrated in the membrane upper circuit layer and disposed at each LED to diffuse illumination towards the key, the illumination passing through the diffuser and the membrane flexible material.
2 . An information handling system comprising:
a housing;
a processor disposed in the housing and operable to execute instructions that process information;
a memory disposed in the housing and interfaced with the processor, the memory operable to store the instructions and information;
an embedded controller disposed in the housing and interfaced with the processor, the embedded controller operable to accept inputs from input devices and communicate the inputs to the processor;
a keyboard interfaced with the embedded controller, the keyboard having plural keys, each of the plural keys accepting an input by a press at a membrane for communication to the embedded controller, the membrane having flexible material with an upper and lower circuit layer configured to detect a key touch, the keyboard further having plural light emitting diodes (LEDs) between the upper and lower circuit layer, each of the plural LEDs disposed below one of the plural keys, each of the plural LEDs directed up towards the one of the plural keys; and
a diffusion layer integrated in the membrane having a diffusive material;
wherein the diffusion layer aligns a diffusive material between each of the plural LEDs and the associated one of the plural keys, each of the plural LEDs illuminating the associated one of the plural keys through membrane flexible material and the diffusive material.