Computer keyboard key scan shared matrix with an individual LED per key

Abstract

Systems, devices, and methods for a shared matrix of shared row pins and/or column pins between a first array of keys and a second array of lights of a keyboard. A keyboard controller addresses the first array of keys and the second array of lights during a scanning period using the shared row pins and/or column pins. Each key is backlit by one or more lights of the second array of lights that may be individually controlled. The keyboard controller may drive the desired lights of a respective row while detecting key presses of the same row during the row interval using the shared row pins and/or column pins. In some embodiments, the keyboard controller may drive the desired lights of a row during driving interval of the row interval, and scan the keys of the row separately during a sensing interval of the row interval.

Description

[0001] Cross References to Related Applications [0002] This application is a non-provisional application of U.S. Provisional Patent Application 61 / 745,035, filed December 21, 2012, entitled "Computer Keyboard Key Scan Shared Matrix with an Individual LED Per Key," which is hereby incorporated by reference . Background technique [0003] The present disclosure relates generally to keyboard assemblies for electronic displays, and more particularly, to computer keyboard key scan sharing matrices with individual light emitting diodes (LEDs) for each key. [0004] This section is intended to introduce the reader to various aspects of prior art that may be related to aspects of the present disclosure that are described and / or claimed below. We believe this discussion is helpful in providing the reader with background information to facilitate a better understanding of various aspects of the disclosure. Accordingly, it should be understood that these statements are to be read in ...

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Problems solved by technology

Unfortunately, the diffuser and backlight circuitry take up extra

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