1-21. (canceled)
22. An information displayingreproducing apparatus, comprising:
a receiver for outputting at least one type of information from among video information, character information, and sound information contained in received broadcast signals; and
an image display device connected to the receiver, and comprising an electron source and a light-emitting member, wherein the electron source includes a plurality of electron-emitting devices and the electron source is produced by a method comprising producing precursors to the electron-emitting devices, each by a method comprising: preparing an electron-emitting member, and
alternately exposing the electron-emitting member to an oxygen-containing gas and a metal-containing gas a plurality of times.
23. An information displayingreproducing apparatus comprising:
a receiver for outputting at least one type of information from among video information, character information, and sound information contained in received broadcast signals; and
an image display device connected to the receiver,
wherein the image display device includes an electron source and a light-emitting member, the electron source including a plurality of electron-emitting devices, and the electron source is produced by a method comprising the step of producing precursors to the electron-emitting devices each by a method comprising:
preparing a first electroconductive film and a second electroconductive film, and
alternately exposing at least one of the first electroconductive film and the second electroconductive film to an oxygen-containing gas and a metal-containing gas a plurality of times.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1-11. (canceled)
12. A method of reporting a channel state for multiple input multiple output (MIMO) in a wireless local access network, the method comprising:
broadcasting, by an initiating station, a channel request frame including an initiator field and a recipient set field, the initiator field indicating an address of the initiating station, the recipient set field including a plurality of subfields indicating a plurality of recipients to prepare a channel response frame, each of the plurality of subfields including a recipient field indicating an identifier of each recipient, wherein the plurality of recipients receive independent data streams simultaneously over same channel bandwidth; and
sequentially receiving, by the initiating station, from each of the plurality of recipients, the channel response frame including the channel state for MIMO channel.
13. The method of claim 12, the method further comprising:
transmitting, by an initiating station, to the plurality of recipients, a null data packet frame to determine the channel state after broadcasting the channel request frame.
14. The method of claim 13, wherein a bandwidth of the channel response frame is equal to or narrower than a bandwidth of the null data packet frame.
15. The method of claim 13, wherein the channel request frame further includes a duration field indicating an estimated time required to transmit the null data packet frame and the channel response frame.
16. The method of claim 15, wherein the channel request frame further includes a receiver address field which is set to a broadcast address.
17. A wireless apparatus of reporting a channel state for multiple input multiple output (MIMO) in a wireless local access network, the wireless apparatus comprising a processor configured to:
broadcast a channel request frame including an initiator field and a recipient set field, the initiator field indicating an address of the wireless apparatus, the recipient set field including a plurality of subfields indicating a plurality of recipients to prepare a channel response frame, each of the plurality of subfields including a recipient field indicating an identifier of each recipient, wherein the plurality of recipients receive independent data streams simultaneously over same channel bandwidth; and
sequentially receive, from each of the plurality of recipients, the channel response frame including the channel state for MIMO channel.
18. The wireless apparatus of claim 17, wherein the processor further configured to transmit, to the plurality of recipients, a null data packet frame to determine the channel state after broadcasting the channel request frame.
19. The wireless apparatus of claim 18, wherein a bandwidth of the channel response frame is equal to or narrower than a bandwidth of the null data packet frame.
20. The wireless apparatus of claim 18, wherein the channel request frame further includes a duration field indicating an estimated time required to transmit the null data packet frame and the channel response frame.
21. The wireless apparatus of claim 18, wherein the channel request frame further includes a receiver address field which is set to a broadcast address.