Information handling system keyboard membrane integrated high speed input/output connection
An information handling system keyboard membrane integrates a high speed communication link, such as a differential serial pair, that communicates between a motherboard and a port exposed at a side of the information handling system housing. A communications hub in the membrane, such as a Thunderbolt hub, coordinates communication of information through the high speed link and communication of key inputs to the motherboard.
1. An information handling system comprising:
a housing having a main portion with an interior, the main portion rotationally coupled to a lid portion configured to accept a display;
a motherboard coupled to the housing main portion in the interior;
a processor coupled to the motherboard and operable to execute instructions that process information;
a memory coupled to the motherboard and operable to store the instructions and information, the memory interfaced with the processor through the motherboard;
a port exposed at a side of the housing and configured to communicate with an external cable;
a keyboard coupled over the housing main portion to enclose the interior, the keyboard having plural keys and a membrane, the membrane including sensors to detect presses of the plural keys against the membrane;
a communication link integrated in the membrane and interfacing the motherboard and the port within the housing interior;
an input/output board coupled to the link and the port; and
a communication hub coupled to the input/output board and operable to receive signals from the motherboard and distribute the signals with plural of the ports coupled to the input/output board.
2. The information handling system of claim 1 wherein the communication link communicates information as electrical signals sent through a differential pair of wirelines.
3. The information handling system of claim 2 wherein the communication link comprises a coplanar waveguide.
4. The information handling system of claim 2 wherein the communication link comprises a differential strip line.
5. The information handling system of claim 1 wherein the port further comprises:
at least one data port; and
at least one graphics port.
6. The information handling system of claim 1 further comprising:
a first set of spring biased pins; and
a first set of pads aligned with the first set of spring biased pins to communicate information between the communication link and the input/output board.
7. The information handling system of claim 6 further comprising:
a membrane circuit board defined on the membrane;
keyboard matrix controller coupled to the membrane and operable to determine key input values sensed as key presses at the membrane; and
a membrane communications hub coupled to the membrane circuit board and interfaced with the keyboard matrix and the communication link, the membrane communication hub configured to communicate key input values to the motherboard and to communicate between the motherboard and the communication link.
8. The information handling system of claim 7 wherein the communication hub and the membrane communication hub comprise Thunderbolt communication hubs.
9. A method for communicating information from an information handling system motherboard to a circuit board having a port, the method comprising:
integrating a differential serial link into a keyboard membrane;
assembling the keyboard membrane in a keyboard to detect keyboard key presses;
assembling the keyboard in the information handling system to directly interface contact pads of the keyboard membrane with the motherboard and the circuit board having the port;
communicating information between the motherboard and port through the differential serial link;
integrating a circuit board with the keyboard membrane; and
including a communications hub on the circuit board to coordinate communication of information through the differential serial link.
10. The method of claim 9 further comprising:
shielding the differential serial link in part with a ground included in the keyboard membrane; and
coupling a ground member to the motherboard, the keyboard membrane and the port.
11. The method of claim 9 further comprising:
communicating between the motherboard and the differential serial link through a first set of spring biased contacts and a first set of contact pads; and
communicating between the differential serial link and the port through a second set of spring biased contacts and a second set of contact pads.
12. The method of claim 9 further comprising:
detecting keyboard key presses with sensors included in the membrane; and
communicating the keyboard key presses through the communications hub to the motherboard.
13. The method of claim 12 wherein the snapping further comprises:
communicating power from the motherboard through the communication hub and the keyboard membrane to the port.
14. The method of claim 13 wherein the port comprises a Type C USB port.
15. A system for communicating information from an information handling system motherboard to a port, the system comprising:
a motherboard;
a port coupled to a circuit board and configured to communicate with an external cable;
a keyboard having plural keys and a membrane, the membrane including sensors to detect presses of the plural keys against the membrane;
a communication link integrated in the membrane and having a first set of contact pads aligned to directly interface with the motherboard and a second set of contact pads aligned to directly interface with the circuit board of the port; and
a communications hub coupled to the membrane and interfaced with the communication link and the sensors to coordinate communication with the motherboard of both information of the communication link and inputs of the key presses.
16. The system of claim 15 wherein the communication link communicates information as electrical signals sent through a differential pair of wirelines.
17. A system of claim 16 further comprising:
a ground coupled to each of the motherboard, port and membrane.