Display with an electrically conducting layer

• US 20040075786A1
• Filed: 12/04/2003
• Published: 04/22/2004
• Est. Priority Date: 12/23/2000
• Status: Active Grant

• Current Assignee: Continental Automotive GmbH (Continental AG)
• Original Assignee: Siemens AG
• Inventors: Zimmermann, Michael, Brandt, Peter, Wesner, Gerhard, Brohm, Thomas
• Granted Patent: US 7,259,809 B2
• Time in Patent Office: Days
• US Class Current: 349/58
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0444 using a single conductive element covering the whole sensing surface, e.g. by sensing the electrical current flowing at the corners

Abstract

A display for showing text and graphical images includes an electrically conducting layer which is connected to a shield potential, such as a ground potential, for shielding the display from external electromagnetic disturbances and preventing radiation from the display of electromagnetic disturbances generated by the display.

Claims

1. A display (1) with an electrical layer (3a, 3b, 14a, 14b), characterized in that the electrically conducting layer (3a, 3b, 14a, 14b) is connected to a shielding potential (M, 20) for high frequencies.

2. The display as claimed in claim 1, characterized in that the electrically conducting layer (3a, 3b, 14a, 14b) is connected to a shielding potential (M, 20) via capacitances.

3. The display as claimed in claim 2, characterized in that the capacitances are realized as capacitors (10a, 10b).

4. The display as claimed in one of the preceding claims, characterized in that the shielding potential is realized as a metal housing (20) or metallized housing which is closed by the display (1).

5. The display as claimed in one of the preceding claims, characterized in that a ground potential (M) is used the as shielding potential.

6. The display as claimed in one of the preceding claims, characterized in that the electrically conducting layer (3a, 3b) is made up of indium-tin oxide and covers the liquid-crystal display (1) over its surface area.

7. The display as claimed in one of the preceding claims, characterized in that the display is formed as a liquid-crystal display, in that the electrically conducting layer (3a, 3b, 14a, 14b) is formed as a heating device.

8. The display as claimed in one of claims 1-5, characterized in that the electrically conducting layer is configured as a heating device and comprises current-conducting paths (14a, 14b), which are arranged on the liquid-crystal display.

9. The display as claimed in claim 7, characterized in that the current-conducting paths (14a, 14b) are arranged between electrodes (13a, 13b) of the liquid-crystal display.

10. The display as claimed in claim 7 or 8, characterized in that the current-conducting paths (14a, 14b) are produced from indium-titanium oxide.

11. The display as claimed in one of claims 1 to 6, characterized in that the electrically conducting layer is formed as part of a touch screen.

12. The display as claimed in claim 11, characterized in that the display is formed as a liquid-crystal display, in that the electrically conducting layer is also used for heating the liquid-crystal display.