Techniques to control brightness in a display
View Patent ↗A node to receive a first current and to couple a first or a second backlighting medium to the node. The first backlighting medium is to conduct the first current and the second backlighting medium to conduct a second current. A switch is coupled to the node and to the first or the second backlighting medium. The switch is to receive a control input signal and to conduct a third current if the second backlighting medium is coupled to the node.
1. An apparatus, comprising:
a node to receive a first current and to couple a first or a second display backlighting medium to said node, said first display backlighting medium to conduct said first current and said second display backlighting medium to conduct a second current; and
a switch coupled to said node and to said first or said second display backlighting medium, said switch to receive a control input signal, said switch to conduct a third current if said second display backlighting medium is coupled to said node.
2. The apparatus of claim 1 , wherein said switch conducts said third current based on said control input signal.
3. The apparatus of claim 1 , wherein said control input signal is a positive, a negative, or a floating input signal.
4. The apparatus of claim 1 , wherein said first display backlighting medium and said second display backlighting medium produce substantially the same level of brightness.
5. The apparatus of claim 1 , wherein said first current is substantially equal to the sum of said second and said third currents.
6. The apparatus of claim 1 , wherein at least one of said first display backlighting medium or said second display backlighting medium comprises a light emitting diode (LED).
7. The apparatus of claim 6 , wherein said LED is arranged in an array lit configuration.
8. The apparatus of claim 6 , wherein said LED is arranged in an edge lit configuration.
9. An apparatus, comprising:
a display backlighting medium; and
a controller coupled to said display backlighting medium, said controller to control a drive current to said display backlighting medium, said controller comprising a node to receive a first current and to couple a first or a second type of said display backlighting medium to said node, said first type of display backlighting medium to conduct said first current and said second type of display backlighting medium to conduct a second current; and
a switch coupled to said node and to said first or said second type of display backlighting medium, said switch to receive a control input signal, said switch to conduct a third current if said second type of display backlighting medium is coupled to said node.
10. The apparatus of claim 9 , comprising a display located above said display backlighting and optically coupled to said display backlighting medium.
11. The apparatus of claim 10 , comprising a diffuser located above said display backlighting and optically coupled to said display backlighting medium, wherein said diffuser is located between said display backlighting medium and said display.
12. The apparatus of claim 10 , comprising a touch panel locate above said display.
13. The apparatus of claim 10 , wherein said display is a liquid crystal display.
14. The apparatus of claim 9 , wherein said controller is adapted to couple to a device platform.
15. The apparatus of claim 14 , wherein said device platform is a wireless mobile computing device.
16. A system, comprising:
an antenna;
a mobile computing device platform coupled to said antenna; a controller coupled to said mobile device platform;
a backlighting medium coupled to said controller, said controller to control a drive current to said backlighting medium, said controller comprising a node to receive a first current and to couple a first or a second type of said backlighting medium to said node, said first type of backlighting medium to conduct said first current and said second type of backlighting medium to conduct a second current; and
a switch coupled to said node and to said first or said second type of backlighting medium, said switch to receive a control input signal, said switch to conduct a third current if said second type of backlighting medium is coupled to said node.
17. The system of claim 16 , wherein said switch conducts said third current based on said control input signal.
18. The system of claim 16 , wherein said first backlighting medium and said second backlighting medium produce substantially the same level of brightness.
19. The system of claim 16 , wherein at least one of said first backlighting medium or said second backlighting medium comprises a light emitting diode (LED).
20. The system of claim 16 , comprising a display located above said backlighting and optically coupled to said backlighting medium.
21. The system of claim 20 , wherein said display is a liquid crystal display.
22. A method, comprising:
receiving a first current in a node;
determining whether a first or second type of display backlighting medium is coupled to the node;
conducting said first current if said display backlighting medium is the first type or conducting a second current if the display backlighting medium is the second type;
receiving a control input signal at a switch coupled to said node and to said first or said second type of display backlighting medium; and
conducting a third current through said switch if said type second display backlighting medium is coupled to said node, wherein the sum of said second and said third current is substantially equal to said first current.
23. The method of claim 22 , comprising conducting said third current based on said control input signal.
24. The method of claim 22 , comprising producing substantially the same level of brightness from said first display backlighting medium and said second display backlighting medium.
25. The apparatus of claim 1 , wherein said switch is selectively coupled to said first display backlighting medium and said second display backlighting medium.
26. The apparatus of claim 1 , wherein said node selectively couples said first display backlighting medium and said second display backlighting medium to said node.
27. The apparatus of claim 26 , wherein said switch is selectively coupled to said first display backlighting medium and said second display backlighting medium.
28. The apparatus of claim 9 , wherein said switch is selectively coupled to said first type of display backlighting medium and said second type of display backlighting medium.
29. The apparatus of claim 28 , wherein said node selectively couples to said first type of display backlighting medium and said second type of display backlighting medium.
30. The method of claim 22 , comprising receiving a control input signal at a switch selectively coupled to said node and to said first type of display backlighting medium and said second type of display backlighting medium.