Display frame with integrated ESD shield, and a user interface construction

• US 6,728,555 B1
• Filed: 09/28/2000
• Issued: 04/27/2004
• Est. Priority Date: 09/29/1999
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Mobile Phones UK Limited (Nokia Corporation)
• Inventors: Töykkälä, Ari-Pekka, Pirilä, Jouko
• Primary Examiner(s): APPIAH, CHARLES NANA
• Application Number:
  US09/672,464
• Time in Patent Office: 1,307 Days
• Field of Search: 455/550.1, 455/575.1, 455/90.3, 455/128, 455/300, 455/301, 455/351, 455/566, 361/816, 361/818, 174/35.R, 174/35.GC, 345/87, 379/437, 379/368, 379/433.07, 379/433.04, 379/451
• US Class Current: 455/566
• CPC Class Codes: H01H 2239/008 Static electricity considerations
• CPC Class Codes: H04M 1/0202 Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets constructional features of telephone transmitters or receivers, e.g. of speakers or microphones H04M1/03
• CPC Class Codes: H05K 9/0067 Devices for protecting against damage from electrostatic discharge

Abstract

A user interface construction is provided for a portable terminal of a communication system. It comprises a circuit board (301, 603) having a first surface as well as a keypad (303, 304), a display unit (307) and a loudspeaker (306) on said first surface. Additionally it comprises an outer cover (311) arranged to essentially cover said keypad (303, 304), display unit (307) and loudspeaker (306). It comprises also between the keypad (303, 304), display unit (307) and loudspeaker (306) and the outer cover (311) an extended display frame (308, 602). It is electrically conductive, coupled to a ground potential member (604) appearing on the circuit board (301, 603) and arranged to hold the keypad (303, 304), display unit (307) and loudspeaker (306) in place with respect to the circuit board (301, 602). Additionally it is arranged to essentially cover the keypad (303, 304), the display unit (307) and the loudspeaker (306) so as to protect them against electrostatic discharges.

Claims

1. A display frame for a portable terminal comprising:

a first extended portion which is elevated, perforated and thereby arranged to essentially cover a loudspeaker located in the vicinity of said display unit, and

a second extended portion which is perforated and thereby arranged to essentially cover a keypad located in the vicinity of said display unit;

wherein the display frame is adapted to hold the display unit in place with respect to a circuit board and to shield the display unit against electrostatic discharges, the display frame being adapted to be located inside an outer cover of the portable terminal and separated from the outer cover.

2. A display frame according to claim 1, wherein said second extended portion is also arranged to essentially cover a microphone located in the vicinity of said keypad.

3. A display frame according to claim 1, wherein a part of the display frame defines an opening and the display frame additionally comprises an integrated elastic gasket surrounding the edge of said opening, said integrated elastic gasket being permanently mechanically attached to the display frame.

4. A display frame according to claim 3, wherein the display frame is arranged to act as a solid insert for an elastic gasket made by injection moulding.

5. The display frame of claim 1 wherein the first extended portion and the second extended portion are positioned along a front portion of the inside of the outer cover of the portable terminal.

6. The device of claim 1 wherein the device is flexible conductive shield.

7. The device of claim 6 wherein the device serves as a mechanical holder of the user interface components on the printed circuit board without attachment of the outer cover.

8. A user interface construction for a portable terminal of a communication system, comprising:

a circuit board having a first surface,

a keypad, a display unit and a loudspeaker on said first surface,

an outer cover arranged to essentially cover said keypad, display unit and loudspeaker, and

between the keypad, display unit and loudspeaker on one hand and the outer cover on the other hand, and physically separated from the outer cover, an extended display frame which is electrically conductive, coupled to a ground potential member appearing on the circuit board and arranged to hold the keypad, display unit and loudspeaker in place with respect to the circuit board and to essentially cover the keypad, the display unit and the loudspeaker so as to protect them against electrostatic discharges.

9. A user interface construction according to claim 8, comprising a microphone, so that said extended display frame is also arranged to hold the microphone in place with respect to the circuit board and to essentially cover the microphone.

10. A user interface construction according to claim 8, comprising between the display unit and the outer cover an elastic gasket which is permanently mechanically attached to said extended display frame.

11. A user interface construction according to claim 8, comprising between the loudspeaker and the outer cover an elastic gasket which is permanently mechanically attached to said extended display frame.

12. A user interface construction according to claim 8, comprising between the microphone and the outer cover an elastic gasket which is permanently mechanically attached to said extended display frame.

13. The user interface of claim 8, wherein the extended display frame allows a user to access and manipulate keys on the keypad.

14. A frame for a display in a portable terminal comprising:

an electrically conductive member adapted to cover user interface components on a printed circuit board of the portable terminal, the electrically conductive member including at least partial opening to allow user access to the user interface components;

the electrically conductive member being adapted to mechanically secure the display in place and provide an electrostatic discharge shield for the display separately from an outer cover of the portable terminal, the outer being adapted to be placed over the frame during assembly of the portable terminal.

15. The frame of claim 14 further comprising at least one integrated electrically conductive gasket surrounding at least one opening in the electrically conductive member, the gasket adapted to provide a physical separation between the frame and the outer cover and establish an electrical connection between the frame and the cover.

16. The frame of claim 14 wherein the electrically conductive member forms a contiguous electrically conductive plane across the user interface components of the portable terminal.

17. The frame of claim 14 wherein the display is secured to the printed circuit board by the frame independently of the outer cover.

18. The frame of claim 14 wherein a minimum physical separation exists between an interior surface of the outer cover and the electrically conductive member.

19. A display frame for holding a display unit in place with respect to a circuit board and for shielding the display unit against electrostatic discharges, comprising:

a first extended portion which is elevated, perforated and arranged to cover a loudspeaker located in the vicinity of said display unit;

a second extended portion which is perforated and arranged to cover a keypad located in the vicinity of said display unit; and

wherein a part of the display frame defines an opening and the display frame additionally comprises an integrated elastic gasket surrounding the edge of said opening, said integrated elastic gasket being permanently mechanically attached to the display frame.

20. An electrostatic protection device for user interface components on a printed circuit board of a portable device comprising:

a single piece shield adapted to cover the user interface components and allow user access and manipulation of the components;

the shield adapted to secure in place each user interface component without any contact with an outer cover;

at least one elastic gasket integrated into the shield and adapted to surround at least one perimeter of at least one opening in the shield, the gasket adapted to prevent the outer cover from contacting a component beneath the at least one opening wherein the device protects the user interface components on the printed circuit board from electrostatic discharge.

21. The device of claim 20 wherein the at least one integrated gasket extends on either side of the protection device along the perimeter of the opening.