DISPLAY APPARATUS

• US 20150286329A1
• Filed: 06/17/2015
• Published: 10/08/2015
• Est. Priority Date: 09/04/2012
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: CHOI, Moonsung, KIM, Incheol, HWANG, Seongmo, PARK, Jihong, LEE, Il Ho, NAM, Seungho
• Granted Patent: US 9,335,857 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04101 2.5D-digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A display apparatus includes a display panel that displays an image during a display period and detects a touch event during a non-display period. The display panel includes a plurality of common electrodes and a plurality of data lines capacitively coupled to the common electrodes during the non-display period. Coordinate information of a position at which the touch event occurs is calculated on the basis of a capacitance variation of the common electrodes and the data lines.

Claims

1. A display apparatus comprising:

a display panel that includes a first substrate providing a touch surface, wherein the display panel displays an image during a display period, and detects a touch event during a non-display period; and

a touch sensor configured to calculate a coordinate information of a position at which the touch event occurs,

wherein the display panel comprises;

a plurality of common electrodes that receive a reference voltage during the display period and receive sensing signals during the non-display period, the common electrodes being extended in a first direction; and

a plurality of data lines that receive data voltages during the display period, the data lines being extended in a second direction crossing the first direction, and a portion of the data lines being capacitively coupled to the common electrodes during the non-display period.