Touch screen liquid crystal display

US9575610B2 · kind B2 · utility

Assignee

• Apple Inc. · US

Inventors

• Steve Porter Hotelling · Los Gatos, US
• Wei Chen · Palo Alto, US
• Christoph H. Krah · Los Altos, US
• John Greer Elias · Townsend, US
• Wei H. Yao · Palo Alto, US
• John Z. Zhong · Saratoga, US
• Andrew Hodge · Palo Alto, US
• Brian R. Land · Woodside, US
• Willem den Boer · Milpitas, US

Key dates

• Filing date: Dec 30, 2015
• Grant date: Feb 21, 2017
• Expiry date: Dec 30, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G09G2310/0205
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

Disclosed herein are liquid-crystal display (LCD) touch screens that integrate the touch sensing elements with the display circuitry. The integration may take a variety of forms. Touch sensing elements can be completely implemented within the LCD stackup but outside the not between the color filter plate and the array plate. Alternatively, some touch sensing elements can be between the color filter and array plates with other touch sensing elements not between the plates. In another alternative, all touch sensing elements can be between the color filter and array plates. The latter alternative can include both conventional and in-plane-switching (IPS) LCDs. In some forms, one or more display structures can also have a touch sensing function. Techniques for manufacturing and operating such displays, as well as various devices embodying such displays are also disclosed.