Display device, computer terminal, and antenna

• US 20020021250A1
• Filed: 06/07/2001
• Published: 02/21/2002
• Est. Priority Date: 06/21/2000
• Status: Active Grant

• Current Assignee: Lenovo PC International Limited (Lenovo Group Ltd.)
• Original Assignee: Lenovo Singapore Pte Limited (Lenovo Group Ltd.)
• Inventors: Asano, Takeshi, Fujii, Kazuo, Gaucher, Brian P., Usui, Hideyuki, Liu, Duixian, Oie, Masaki, Studwell, Thomas W., Flint, Ephraim B.
• Granted Patent: US 6,853,336 B2
• Time in Patent Office: Days
• US Class Current: 343/702
• CPC Class Codes: G06F 1/1698 the I/O peripheral being a sending/receiving arrangement to establish a cordless communication link, e.g. radio or infrared link, integrated cellular phone details of antennas disposed inside a computer H01Q1/2266
• CPC Class Codes: H01Q 1/2266 disposed inside the computer
• CPC Class Codes: H01Q 1/44 using equipment having another main function to serve additionally as an antenna , e.g. means for giving an antenna an aesthetic aspectH01Q1/27 - H01Q1/34 take precedence
• CPC Class Codes: H01Q 1/52 Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure absorbing means H01Q17/00
• CPC Class Codes: H01Q 13/106 Microstrip slot antennas patch antenna elements H01Q9/0407
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H01Q 21/30 Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
• CPC Class Codes: H01Q 9/42 with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Abstract

In a notebook type computer terminal, a plate type slot antenna is provided between a display panel and a surrounding wall of a display panel housing so that a radiator portion thereof is projecting from a frame of the display panel and a stay, which are made of conductive material by a length more than a predetermined dimension S. A ground portion of the antenna is connected not only to a ground of a radio transceiver unit but also to the display panel housing made of conductive material through the stay.

Claims

1. A display device, comprising:

a display panel having a display surface for images and an outer side face adjacent to said display surface;

a housing containing said display panel and having an inner surface opposed to said outer side face of said display panel; and

an antenna located between said outer side face of said display panel and said inner surface of said housing;

wherein said antenna includes a radiator portion provided at a predetermined distance from a conductive material portion of said display panel and/or said housing and a ground portion connected to said portions made of conductive material.

2. The display device according to claim 1, further comprising:

a rib formed on the outer portion of said housing so that it projects approximate vertically to said display surface of said display panel; and

a frame filling a space between said housing and said display panel wherein said antenna is sandwiched between said rib and said frame.

3. The display device according to claim 1, wherein said antenna is a plate type slot antenna or an inverted-F type antenna.

4. The display device according to claim 1, wherein said radiator portion of said antenna is located at a predetermined distance from said portions made of conductive material in a direction orthogonal to said display surface of said display panel.

5. The display device according to claim 1, wherein said radiator portion of said antenna is located at a predetermined distance from said portions made of conductive material in a direction parallel to said display surface of said display panel.

6. A computer terminal which is capable of opening and closing, comprising:

a first housing with a built-in display panel; and

a second housing rotatably connected to one end of said first housing wherein said first housing has a rib on its outer portion which projects from the side opposed to said second housing wherein said rib contains an antenna which transmits and receives radio signals for communicating data between said computer terminal and outside.

7. The computer terminal according to claim 6, wherein said second housing has, at a location corresponding to said rib of said first housing, a recess for receiving said rib when said first housing and said second housing are closed.

8. The computer terminal according to claim 6, wherein said antenna is formed to be located on almost the top of said computer terminal when said first housing is opened to be in an upright position with respect to said second housing.

9. The computer terminal according to claim 6, wherein said antenna has a radiator portion which transmits and receives radio signals, provided at a distance larger than a dimension determined from the wavelength of radio signals to be transmitted and received by said antenna, from portions of said display panel and said first housing that are made of conductive material.

10. A computer terminal, comprising:

a display panel having a display surface for images and an outer side face adjacent to said display surface;

a housing made of conductive material and having an inner surface opposed to said outer side face of said display panel for containing said display panel;

a control unit controlling said display panel; and

an antenna transmitting radio signals to receive radio signals from outside and transferring signals based on said radio signals between said control unit wherein said antenna is located between said outer side face of said display panel and said inner surface of said housing and is electrically grounded to said housing.

11. The computer terminal according to claim 10, further comprising:

another housing rotatably connected to said housing; and

a hinge unit made of conductive material and rotatably connecting said housing and said another housing wherein said antenna is grounded to said housing via said hinge unit.

12. The computer terminal according to claim 10, wherein one end of a ground line is connected to said antenna and the other end of said ground line is connected to a ground made of conductive material.

13. The computer terminal according to claim 10, wherein said antenna has a radiator portion provided at a predetermined distance from said housing and the frame of said display panel wherein said housing has a cut-out formed to be at a predetermined distance from said radiator portion and said cut-out has a cover made of non-conductive material to fill said cut-out.

14. The computer terminal according to claim 13, wherein a rib is formed on the outer portion to project toward said display surface of said display panel and said rib is provided with said cut-out and said cover.

16. The antenna according to claim 15, wherein the housing of said display device is formed of conductive material wherein said support member is connected to the housing of said display device.

17. The antenna according to claim 15, wherein said ground portion is fastened to said support member with a fastening member.

18. The antenna according to claim 15, wherein said radiator portion is provided at a predetermined distance from portions of said display device that are made of conductive material.

20. The antenna arrangement of claim 19, further comprising a means for conducting a signal comprising a first component for conducting the signal connected to the feed portion and a second component for grounding the conducting means connected to the RF foil opposite the feed portion.

21. The antenna arrangement of claim 20, wherein the means for conducting the signal is a coaxial cable having an inner conductor connected to the feed portion and an outer conductor connected to the RF foil opposite the feed portion.

22. The antenna arrangement of claim 19, wherein an impedance match is achieved by positioning a feed conductor at a midpoint of the length of the antenna arrangement for increasing impedance and towards an end of the length for decreasing the impedance.

24. The antenna arrangement of claim 23, further comprising a means for conducting a signal comprising a first component for conducting the signal connected to the feed portion and a second component for grounding the conducting means connected to the RF foil opposite the feed portion.

25. The antenna arrangement of claim 24, wherein the means for conducting the signal is a coaxial cable having an inner conductor connected to the feed portion and an outer conductor connected to the RF foil opposite the feed portion.

26. The antenna arrangement of claim 23, wherein an impedance match is achieved by positioning a feed conductor at an open end of the length of the antenna arrangement for increasing impedance and towards a closed end of the length for decreasing the impedance.

15. An antenna mounted on a display device comprising:

a display panel, a first ground, and a second ground wherein said antenna includes a radiator portion transmitting/receiving radio signals and having a feeder connected thereto at a predetermined location in its longitudinal direction, and

a ground portion connected to said first ground and said second ground wherein said ground portion is in electrically connected with said first ground via a ground line connected at a location corresponding to said predetermined location of said radiator portion and in electrically connected with said second ground via a support member supporting said display panel.

19. An integrated antenna arrangement comprising:

a conductive RF shielding foil disposed on the back of an electronic display having a hole; and

a feed portion extending partially across the hole forming a slot antenna.

23. An integrated antenna arrangement comprising:

a conductive RF shielding foil disposed on the back of an electronic display having a notch; and

a feed portion extending partially across the notch forming an inverted-F antenna.