1. A method for communication of video information over wireless channels in a communication system including senders and receivers, comprising:
packetizing video information of one or more video streams into packets for transmission over a wireless channel;
controlling channel access by dividing a single contention-free period (CFP) for both a high-rate channel and a low-rate channel into separate multiple schedules, wherein each of the separate multiple schedules within the single CFP includes one or more periodical channel time blocks (CTBs) reserved for transmission of isochronous streams, and the multiple separate schedules are allocated for one isochronous or asynchronous stream; and
transmitting packets from a sender to a receiver during the channel time blocks.
2. The method of claim 1 wherein:
transmitting packets further includes: transmitting packets of video information from a sender to a receiver over the high-rate channel during the channel time blocks, and transmitting acknowledgment packets from the receiver to sender over the low-rate channel during the channel time blocks.
3. The method of claim 2 wherein controlling channel access further includes providing a superframe period comprising a beacon frame that provides schedule timing allocations for dividing the contention-free period (CFP) into channel time blocks.
4. The method of claim 3 wherein the superframe further comprises a contention-based control period (CBCP) for communicating control and management commands over a low-rate channel.
5. The method of claim 4 wherein no information is transmitted over a high-rate channel during a CBCP.
6. The method of claim 4 wherein the superframe further comprises a beam-search period (BSP) for searching transmission beams.
7. The method of claim 4 further comprising periodically transmitting a beacon to signal the start of a superframe period.
8. The method of claim 4 wherein the beacon specifies the start time, and length, of the CBCP and CFP in the corresponding superframe.
9. The method of claim 8 wherein the beacon specifies an allocation of channel time blocks to different senders and receivers.
10. The method of claim 9 wherein the beacon further specifies an allocation of channel time blocks to different streams.
11. The method of claim 4 wherein channel access during the CFP is based on Time Division Multiple Access (TDMA).
12. The method of claim 4 wherein each separate schedule comprises a series of evenly distributed CTBs with equal length, in the CFP.
13. The method of claim 4 further comprising:
a sender transmitting a bandwidth request command for transmission of both isochronous streams and asynchronous data over a channel; and
if sufficient bandwidth remains in the channel, then allocating at least one schedule in the CFP to the sender.
14. The method of claim 13 further comprising allocating the separate multiple schedules to the sender.
15. The method of claim 13 further comprising the sender transmitting multiple streams to a receiver over the channel during the at least one allocated schedule.
16. The method of claim 13 further comprising:
the sender transmitting a stream to a receiver over the channel during the at least one allocated schedule; and
the receiver transmitting an ACK to the sender during the at least one schedule.
17. The method of claim 16 wherein during a CTB one or more packets are transmitted from the sender to the receiver, and one or more corresponding ACKs are transmitted from the receiver to the sender.
18. A system for communication of video information over wireless channels, comprising:
a coordinator controls channel access by dividing a single contention-free period (CFP) for both a high-rate channel and a low-rate channel into separate multiple schedules, wherein each of the separate multiple schedules within the single CFP includes one or more periodical channel time blocks (CTBs) reserved for transmission of isochronous stream, and the multiple separate schedules in the single CFP are allocated for one isochronous or asynchronous streams; and
a transmitter including a packetizer that places video information of one or more video streams into packets for transmission over a wireless channel, and a communication module that transmits packets to a receiver over a high-rate channel during the channel time blocks.
19. The system of claim 18 further comprising a receiver that transmits acknowledgment packets from the receiver to the transmitter during the channel time blocks over the low-rate channel.
20. The system of claim 19 wherein the coordinator further provides a superframe period comprising a beacon frame that includes schedule timing allocations for dividing the CFP into channel time blocks.
21. The system of claim 20 wherein the superframe further comprises a CBCP for communicating control and management commands over the low-rate channel.
22. The system of claim 21 wherein no information is transmitted over the high-rate channel during the CBCP.
23. The system of claim 21 wherein the superframe further comprises a BSP for searching transmission beams.
24. The system of claim 21 wherein the coordinator further periodically transmits a beacon to signal the start of a superframe period.
25. The system of claim 21 wherein the beacon specifies the start time, and length, of the CBCP and CFP in the corresponding superframe.
26. The system of claim 25 wherein the beacon specifies an allocation of channel time blocks to different senders and receivers.
27. The system of claim 26 wherein the beacon further specifies an allocation of channel time blocks to different streams.
28. The system of claim 21 wherein channel access during the CFP is based on TDMA.
29. The system of claim 21 wherein each schedule comprises a series of evenly distributed CTBs with equal length, in the CFP.
30. The system of claim 21 wherein:
the transmitter further transmits a bandwidth request command for transmission of both isochronous streams and asynchronous data over a channel; and
the controller further determines if sufficient bandwidth remains in the channel, and if sufficient bandwidth remains in the channel the controller allocates at least one of the separate multiple schedules in the CFP for transmission of both isochronous streams and asynchronous data by the transmitter over the channel.
31. The system of claim 30 wherein the coordinator further allocates the multiple schedules to the transmitter.
32. The system of claim 30 wherein the transmitter further transmits multiple streams to the receiver over the channel during the at least one allocated schedule.
33. The system of claim 30 wherein:
the transmitter further transmits a stream to the receiver over the channel during the at least one allocated schedule; and
the receiver further transmits an ACK to the sender during the at least one allocated schedule.
34. The system of claim 33 wherein during a CTB, one or more packets are transmitted from the transmitter to the receiver, and one or more corresponding ACKs are transmitted from the receiver to the transmitter.
35. A coordinator for controlling communication of video information over wireless channels in a communication network, comprising:
a scheduler divides a single contention-free period (CFP) for both a high-rate channel and a low-rate channel into separate multiple schedules, wherein each of the separate multiple schedules within the single CFP includes one or more periodical channel time blocks (CTBs) reserved for transmission of isochronous streams, and the separate multiple schedules are allocated for one isochronous or asynchronous stream; and
a controller receives a bandwidth request, and allocates channel bandwidth based on the separate multiple schedules to control channel access.
36. The coordinator of claim 35 wherein:
the controller receives a bandwidth request over the low-rate channel from a wireless transmitter, and allocates channel bandwidth based on said multiple separate schedules to control access to the high-rate channel by the transmitter for transmission of video information to a wireless receiver over the high-rate channel.
37. The coordinator of claim 36 wherein the scheduler provides a superframe period comprising a beacon frame that includes schedule timing allocations for dividing the CFP into channel time blocks.
38. The coordinator of claim 37 wherein the superframe further comprises a CBCP for communicating control and management commands over the low-rate channel.
39. The coordinator of claim 38 wherein no information is transmitted over the high-rate channel during the CBCP.
40. The coordinator of claim 38 wherein the superframe further comprises a BSP for searching transmission beams.
41. The coordinator of claim 38 wherein the coordinator periodically transmits a beacon to signal the start of a superframe period.
42. The coordinator of claim 38 wherein the beacon specifies the start time, and length, of the CBCP and CFP in the corresponding superframe.
43. The coordinator of claim 42 wherein the beacon specifies an allocation of channel time blocks to different senders and receivers.
44. The coordinator of claim 43 wherein the beacon further specifies an allocation of channel time blocks to different streams.
45. The coordinator of claim 38 wherein channel access during the CFP is based on TDMA.
46. The coordinator of claim 38 wherein each separate schedule comprises a series of evenly distributed CTBs with equal length, in the CFP.
47. The coordinator of claim 38 wherein:
the network includes a transmitter that transmits a bandwidth request to the coordinator for transmission of both isochronous streams and asynchronous data over a channel; and
the controller further determines if sufficient bandwidth remains in the channel, and if sufficient bandwidth remains in the channel then the controller allocates at least one of the separate multiple schedules in the CFP for transmission of both isochronous streams and asynchronous data by the transmitter over the channel.
48. The coordinator of claim 47 wherein the controller allocates the separate multiple schedules to the transmitter.
49. The coordinator of claim 47 wherein the transmitter transmits multiple streams to the receiver over the channel during the at least one allocated schedule.
50. The coordinator of claim 47 wherein the network further includes a receiver, such that the transmitter transmits a stream to the receiver over the channel during the at least one allocated schedule, and the receiver transmits an ACK to the sender during the at least one allocated schedule.
51. The coordinator of claim 50 wherein during a CTB, one or more packets are transmitted from the transmitter to the receiver, and one or more corresponding ACKs are transmitted from the receiver to the transmitter.
52. The method of claim 17, wherein each CTB is limited to including a single data-ACK pair.
53. The method of claim 1, wherein upon a new sender or receiver joining the system, during an association response phase, a coordinator forwards all schedule information to the new sender or receiver.
54. The method of claim 53, wherein upon a sender or receiver enters a sleep mode for a predetermined time period comprising multiple superframes, the sender or receiver wakes and requests schedule information from the coordinator.
55. The method of claim 1, wherein the separate multiple schedules comprise multiple separate data-ACK pairs.
56. The method of claim 1, wherein for each of the separate multiple schedules, only a single data-ACK pair is included within each CTB.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A display device comprising:
a display and a front panel,
wherein the front panel is made of plastic and is at least partly provided with a metallic coating, applied by means of physical vapor deposition, and wherein the metallic coating is electrically grounded when the display device is placed in operation.
2. The display device as claimed in claim 1, wherein the front panel comprises a black coating, at least in some regions.
3. The display device as claimed in claim 1, wherein a light sensor is provided beneath front of the front panel.
4. The display device as claimed in claim 3, wherein the light sensor is provided in a blind hole.
5. The display device as claimed in claim 3, wherein the light sensor is an infrared sensor.
6. The display device as claimed in claim 1, wherein the display is a TFT visual display unit.
7. The display device as claimed in claim 1, comprising a rear housing.