Devices and methods for shielding displays from electrostatic discharge
Methods and devices for shielding displays from electrostatic discharge (ESD) are provided. In one example, a display of an electronic device may include a high resistivity shielding layer configured to protect electrical components from static charges. The display may also include a conductive layer electrically coupled to the high resistivity shielding layer and configured to decrease a discharge time of static charges from the high resistivity shielding layer. The display may include a grounding layer and a conductor electrically coupled between the conductive layer and the grounding layer to direct static charges from the conductive layer to the grounding layer.
1. A display of an electronic device comprising:
a high resistivity shielding layer configured to protect electrical components from static charges;
a conductive layer electrically coupled to the high resistivity shielding layer and configured to decrease a discharge time of static charges from the high resistivity shielding layer, wherein the conductive layer comprises one or more conductive bars electrically coupled together;
a grounding layer; and
a conductor electrically coupled between the conductive layer and the grounding layer to direct static charges from the conductive layer to the grounding layer.
2. The display of claim 1 , wherein the high resistivity shielding layer comprises indium tin oxide, indium zinc oxide, or any combination thereof.
3. The display of claim 1 , wherein the high resistivity shielding layer comprises a resistance of greater than approximately 1000 ohms per square.
4. The display of claim 1 , wherein the high resistivity shielding layer is configured to protect a display layer, a touch layer, or any combination thereof from static charges.
5. The display of claim 1 , wherein the conductive layer comprises one or more conductive dots electrically coupled together.
6. The display of claim 1 , wherein the conductive layer comprises a conductive ring disposed along a border of the high resistivity shielding layer.
7. The display of claim 1 , wherein the conductive layer comprises a conductive ring disposed along a border of the high resistivity shielding layer and a conductive bar coupled to the conductive ring and to the conductor.
8. The display of claim 1 , wherein the conductive layer comprises a metallic material.
9. The display of claim 8 , wherein the metallic material comprises silver.
10. The display of claim 1 , wherein the conductive layer comprises a carbon nanotube.
11. The display of claim 1 , wherein the conductive layer comprises a conductive polarizer.
12. A method of manufacturing a consumer electronic device, comprising:
providing a display panel, wherein the display panel comprises:
a high resistivity shielding layer configured to protect electrical components of the display panel from static charges;
a conductive layer electrically coupled to the high resistivity shielding layer and configured to increase a speed that static charges are directed from the high resistivity shielding layer, wherein the conductive layer comprises one or more conductive bars electrically coupled together;
a grounding layer; and
a conductor electrically coupled between the conductive layer and the grounding layer to direct static charges from the conductive layer to the grounding layer; and
coupling a processing device to the display panel.
13. The method of claim 12 , comprising coupling the display panel and the processing device to a housing.
14. A method of manufacturing a display panel for a display device, comprising:
providing a substrate;
forming a grounding layer over the substrate, wherein forming the grounding layer over the substrate comprises forming the grounding layer directly on a thin-film transistor layer;
forming a high resistivity shielding layer over the grounding layer, wherein the high resistivity shielding layer is configured to protect electrical components of the display panel from static charges;
forming a conductive layer directly on the high resistivity shielding layer, wherein the conductive layer is electrically coupled to the high resistivity shielding layer and configured to decrease a time that it takes to direct static charges from the high resistivity shielding layer; and
forming a conductor directly on the grounding layer and the conductive layer to direct static charges from the conductive layer to the grounding layer.
15. The method of claim 14 , wherein forming the high resistivity shielding layer over the grounding layer comprises forming the high resistivity shielding layer directly on a color filter glass layer.
16. The method of claim 14 , wherein forming the high resistivity shielding layer over the grounding layer comprises forming the high resistivity shielding layer directly on a polarizer layer.
17. The method of claim 16 , wherein forming the conductive layer directly on the high resistivity shielding layer comprises forming the polarizer layer directly on the high resistivity shielding layer.
18. The method of claim 14 , wherein forming the high resistivity shielding layer over the grounding layer comprises forming the high resistivity shielding layer directly on a color filter glass layer, wherein the color filter glass layer comprises on-cell touch.
19. The method of claim 14 , comprising forming a liquid crystal layer between the substrate and the high resistivity shielding layer, wherein the liquid crystal layer comprises in-cell touch.
20. A display device comprising:
a thin-film transistor layer;
a grounding layer disposed over the thin-film transistor layer;
a liquid crystal layer disposed over the grounding layer;
a color filter glass layer disposed over the liquid crystal layer;
a high resistivity shielding layer disposed over the color filter glass layer, the high resistivity shielding layer configured to protect electrical components from static charges;
a conductive layer disposed directly on the high resistivity shielding layer and configured to increase a speed that static charges are directed from the high resistivity shielding layer, wherein the conductive layer comprises one or more conductive bars electrically coupled together; and
a conductor disposed between the conductive layer and the grounding layer to direct static charges from the conductive layer to the grounding layer.
21. The display device of claim 20 , wherein the color filter glass layer comprises on-cell touch.
22. An electronic device comprising:
a liquid crystal display (LCD) panel comprising a plurality of display pixels arranged in rows and columns, wherein the display panel comprises:
a high resistivity shielding layer disposed over the display pixels and configured to protect the display pixels from static charges;
a conductive layer electrically coupled to the high resistivity shielding layer and configured to decrease a discharge time for static charges to be directed from the high resistivity shielding layer, wherein the conductive layer comprises one or more conductive bars electrically coupled together;
a grounding layer; and
a conductor electrically coupled between the conductive layer and the grounding layer to direct static charges from the conductive layer to the grounding layer.
23. The electronic device of claim 22 , wherein the conductive layer comprises a conductive ring disposed along a border of the high resistivity shielding layer.
24. The method of claim 12 , wherein the high resistivity shielding layer comprises a resistance of greater than approximately 1000 ohms per square.
25. The method of claim 14 , wherein the high resistivity shielding layer comprises a resistance of greater than approximately 1000 ohms per square.
26. The display device of claim 20 , wherein the high resistivity shielding layer comprises a resistance of greater than approximately 1000 ohms per square.
27. The electronic device of claim 22 , wherein the high resistivity shielding layer comprises a resistance of greater than approximately 1000 ohms per square.