WIRELESS DISPLAY SYSTEM AND METHOD THEREOF

• US 20090029647A1
• Filed: 12/05/2006
• Published: 01/29/2009
• Est. Priority Date: 12/05/2005
• Status: Active Grant

• Current Assignee: Lenovo (Beijing) Limited (Lenovo Group Ltd.)
• Original Assignee: Lenovo (Beijing) Limited (Lenovo Group Ltd.)
• Inventors: Wei, Wei, Guo, Zihua
• Granted Patent: US 8,213,858 B2
• Time in Patent Office: Days
• US Class Current: 455/41.300
• CPC Class Codes: G06F 3/147 using display panels
• CPC Class Codes: G09G 2340/02 Handling of images in compressed format, e.g. JPEG, MPEG
• CPC Class Codes: G09G 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04

Abstract

A wireless display system is disclosed comprising a host-side data communication apparatus connected to a host and configured to acquire media data containing at least display data from the hardware of said host, generate data message and transfer the data message wirelessly, and a display-device side data communication apparatus configured to receive the data message transferred wirelessly, interpret it into media data and then output to a display device. With the system of the present invention, CPU does not need to execute a screen-capturing program to acquire display information from a display memory unit and thus has a reduced work load, and transmission delay can also be reduced.

Claims

1-43. -43. (canceled)

44. A wireless display system, comprising a host-side data communication apparatus and a display-device side data communication apparatus, wherein the host-side data communication apparatus comprises:

a sampling section which samples display data from the hardware of host;

a data protocol packetizing section which packetizes the display data sampled by the sampling section into corresponding data message in accordance with certain network transport protocol;

a transmitting section which transmits the data message wirelessly;

the display-device side data communication apparatus comprises;

a receiving section which receives the data message transmitted wirelessly;

a data protocol unpacketizing section which unpacketizes the data message to obtain the display data; and

an output section which performs high-speed refresh processing by using the display data.

45. The wireless display system according to claim 44, wherein the host-side data communication apparatus further comprises a data compression section which compresses the sampled display data, and the display-device side data communication apparatus further comprises a data decompression section which decompresses the display data unpacketized by the data protocol unpacketizing section and then transferring to the output section.

46. The wireless display system according to claim 44, wherein the network transport protocol is one of TCP/IP, wireless USB protocol, wireless 1394 protocol, DVI/HSDI protocol or other predetermined transmission protocol.

47. The wireless display system according to claim 44, wherein the sampling section is inserted externally at the output interface of the graphics adaptor of host or connected directly to the output interface of a graphics adaptor internally.

48. A wireless display system, comprising a host-side data communication apparatus and a plurality of display-device side data communication apparatuses, wherein the host-side data communication apparatus comprises:

a sampling section which samples display data from the hardware of host;

a data protocol packetizing section which packetizes the display data sampled by the sampling section into corresponding data message in accordance with certain network transport protocol;

a transmitting section which transmits the data message wirelessly;

each of the display-device side data communication apparatuses comprises;

a receiving section which receives the data message transmitted wirelessly;

a data protocol unpacketizing section which unpacketizes the data message to obtain the display data; and

an output section which performs high-speed refresh processing by using the display data.

49. A wireless display system, comprising a plurality of host-side data communication apparatuses and a display-device side data communication apparatus, wherein each of the host-side data communication apparatuses comprises:

a sampling section which samples display data from the hardware of host;

a data protocol packetizing section which packetizes the display data sampled by the sampling section into corresponding data message in accordance with certain network transport protocol;

a transmitting section which transmits the data message wirelessly;

the display-device side data communication apparatus comprises;

a receiving section which receives the data message transmitted wirelessly;

a data protocol unpacketizing section which unpacketizes the data message to obtain the display data; and

an output section which combines the display data corresponding to the hosts into a frame and performs high-speed refresh processing by using the display data.

50. A wireless display system, comprising a plurality of host-side data communication apparatuses and a plurality of display-device side data communication apparatuses, wherein each of the host-side data communication apparatuses comprises:

a sampling section which samples display data from the hardware of host;

a data protocol packetizing section which packetizes the display data sampled by the sampling section into corresponding data message in accordance with certain network transport protocol;

a transmitting section which transmits the data message wirelessly;

each of the display-device side data communication apparatuses comprises;

a receiving section which receives the data message transmitted wirelessly;

a data protocol unpacketizing section which unpacketizes the data message to obtain the display data; and

an output section which combines the display data corresponding to the hosts into a frame and performs high-speed refresh processing by using the display data.

51. A wireless display system, comprising a host-side data communication apparatus and a display-device side data communication apparatus, wherein the host-side data communication apparatus comprises:

a data collecting section which collects the media data comprising display data and audio data from the hardware of host directly;

a data protocol packetizing section which packetizes the media data collected by the collecting section into corresponding data message in accordance with certain network transport protocol;

a transmitting section which transmits the data message wirelessly;

the display-device side data communication apparatus comprises;

a receiving section which receives the data message transmitted wirelessly;

a data protocol unpacketizing section which unpacketizes the data message to obtain the media data comprising display data and audio data; and

an output section which outputs the display data and the audio data to the display device and the speaker respectively.

52. The wireless display system according to claim 51, wherein the data collecting section comprises:

an image processing unit for receiving display information and converting it into pixel information and display control signals; and

an audio processing unit for receiving sound information and converting it into audio signals.

53. The wireless display system according to claim 51, wherein the transmitting section comprises:

a probing &

connecting unit for establishing a wireless connection between the host and the display device;

a communication control unit for control communication quality; and

a radio unit which receives the message and further encoding and modulating it to wireless signals for transmission.

54. The wireless display system according to claim 53, wherein the communication control unit receives display device parameters transferred by probe response message, determines transmission parameters and message coding format based on the display device parameters and user-set display parameters, and the radio unit transmits the transmission parameters and message coding format.

55. The wireless display system according to claim 53, wherein the communication control unit probes the strength of the signals transferred by the display device and packet loss ratio result, calculates the distance and interference between the host and the display device, and, based on these factors, adjusts the transmitting power of radio unit.

56. The wireless display system according to claim 53, wherein the message contains at least (1) display device identification information, (2) message type information, (3) message length information and (4) video or audio message data.

57. The wireless display system according to claim 53, wherein the video message data contains at least (1) field synchro information, (2) line synchro information, (3) pixel cell identification and (4) pixel data.

58. The wireless display system according to claim 57, wherein all the types of information in the video message is positioned in such order that the filed synchro information is followed by the pixel information contained in all lines within one field, and the line synchro information is followed by all pixel information contained in one line.

59. The wireless display system according to claim 51, wherein the receiving section comprises:

a radio unit which receives the data message from the host wirelessly;

a control unit which controls the radio unit as well as performs authentication and negotiation on keys; and

a data protocol unpacketizing unit which interprets the data message received by the radio unit into the display data and the audio data in accordance with corresponding protocol.

60. The wireless display system according to claim 51, wherein the data protocol unpacketizing unit is a HSDI control unit.

61. The wireless display system according to claim 51, wherein the output section comprises a VGA DMA unit, a VGA control unit and a VGA Timing unit.

62. The wireless display system according to claim 51, wherein the data protocol unpacketizing unit is an embedded processing chip.

63. The wireless display system according to claim 51, wherein the output section is a GPU.

64. The wireless display system according to claim 51, wherein the display device-side data communication apparatus is inserted externally on the display device or integrated into the display device.

65. The wireless display system according to claim 51, wherein the receiving section comprises:

a radio unit which receives and decodes the wireless signals transmitted from the host;

a codec unit which receives the decoded signals and further decodes them as pixel information, control signals or audio signals;

a communication control unit which controls communication quality; and

a probing &

connecting unit which establishes a wireless connection between the host and the display device.

66. The wireless display system according to claim 65, wherein the communication control unit acquires from the control signals display device parameters used in determining line and field parameters.

67. The wireless display system according to claim 51, wherein the output section comprises:

a display controller which receives pixel information and display control signals, drives the display device based on the information; and

an audio output unit which receives the decoded audio signals and generates a drive signal for driving the speaker.

68. A wireless display system, comprising a host-side data communication apparatus and a plurality of display-device side data communication apparatuses, wherein the host-side data communication apparatus comprises:

a data collecting section which collects the media data comprising display data and audio data from the hardware of host directly;

a data protocol packetizing section which packetizes the media data collected by the collecting section into corresponding data message in accordance with certain network transport protocol;

a transmitting section which transmits the data message wirelessly;

each of the display-device side data communication apparatuses comprises;

a receiving section which receives the data message transmitted wirelessly;

a data protocol unpacketizing section which unpacketizes the data message to obtain the media data comprising display data and audio data; and

an output section which outputs the display data and the audio data to the display device and the speaker respectively.

69. A wireless display system, comprising a plurality of host-side data communication apparatuses and a display-device side data communication apparatus, wherein each of the host-side data communication apparatuses comprises:

a data collecting section which collects the media data comprising display data and audio data from the hardware of host directly;

a data protocol packetizing section which packetizes the media data collected by the collecting section into corresponding data message in accordance with certain network transport protocol;

a transmitting section which transmits the data message wirelessly;

the display-device side data communication apparatus comprises;

a receiving section which receives the data message transmitted wirelessly;

a data protocol unpacketizing section which unpacketizes the data message to obtain the media data comprising display data and audio data; and

an output section which combines the display data corresponding to the hosts into a frame and outputs the display data and the audio data to the display device and the speaker respectively.

70. A wireless display system comprising a plurality of host-side data communication apparatuses and a plurality of display-device side data communication apparatuses, wherein each of the host-side data communication apparatuses comprises:

a data collecting section which collects the media data comprising display data and audio data from the hardware of host directly;

a data protocol packetizing section which packetizes the media data collected by the collecting section into corresponding data message in accordance with certain network transport protocol;

a transmitting section which transmits the data message wirelessly;

each of the display-device side data communication apparatuses comprises;

a receiving section which receives the data message transmitted wirelessly;

a data protocol unpacketizing section which unpacketizes the data message to obtain the media data comprising display data and audio data; and

an output section which combines the display data corresponding to the hosts into a frame and outputs the display data and the audio data to the display device and the speaker respectively.

71. A wireless display method comprising the steps of:

at host side,

sampling display data from the hardware of host;

packetizing the display data sampled into corresponding data message in accordance with certain network transport protocol;

transmitting the data message wirelessly;

at display-device side,

receiving the data message transmitted wirelessly;

unpacketizing the data message to obtain the display data; and

performing high-speed refresh processing by using the display data

72. The wireless display method according to claim 71, further comprising the steps of:

at host side, compressing the sampled display data, and at the display device side, decompressing the display data unpacketized and then transferring to the output section.

73. The wireless display method according to claim 71, wherein the network transport protocol is one of TCP/IP, wireless USB protocol, wireless 1394 protocol, DVI/HSDI protocol or other predetermined transmission protocol.

74. A wireless display method comprising the steps of:

at host side,

collecting the media data comprising display data and audio data from the hardware of host directly;

packetizing the media data collected into corresponding data message in accordance with certain network transport protocol;

transmitting the data message wirelessly;

at display-device side,

receiving the data message transmitted wirelessly;

unpacketizing the data message to obtain the media data comprising display data and audio data; and

outputting the display data and the audio data to the display device and the speaker respectively.

75. The wireless display method according to claim 74, further comprising a step of:

establishing connection between the host and the display device before the step of transmitting.

76. The wireless display method according to claim 75, wherein the step of establishing connection comprises:

transmitting probe message containing display device identification information from the host to the display device;

receiving, by the display device, the probe message and comparing the identification information in the probe message with the identification information of the display device;

transmitting probe response message from the display device to the host when the identification information in the probe message coincides with the identification information of the display device, the probe response message containing technical parameters and model of the display device; and

receiving, by the host, the probe response message and establishing connection.

77. The wireless display method according to claim 76, further comprising the step of:

determining, by the host, the coding format of the data message transmitted to the display device based on the technical parameters and model of the display device.

78. The wireless display method according to claim 77, further comprising the step of:

calculating, by the host, the distance and interference between the host and the display device based on the strength of the signals transferred by the display device and packet loss ratio result during the connection establishment, and adjusting the transmitting power of wireless signals.

79. The wireless display method according to claim 78, further comprising the step of:

detecting, by the display device, the integrity check code of the probe message so as to configure link layer parameters and physical layer parameters.