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Active stylus ring electrode

A ring-shaped electrode and electrode technology, which is applied to capacitors that change the effective area of ​​electrodes, capacitors that change capacitance mechanically, circuits, etc., can solve the difficulties in detecting the azimuth and tilt angle of the active stylus, tilt jitter, Problems such as inaccurate tilt

Active Publication Date: 2018-05-11
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when using an active stylus at a specific orientation angle, detecting the azimuth and tilt of the active stylus can be difficult (e.g., can lead to tilt inaccuracy and tilt jitter)

Method used

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  • Active stylus ring electrode
  • Active stylus ring electrode
  • Active stylus ring electrode

Examples

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Embodiment Construction

[0021] In the following description of the examples, reference is made to the accompanying drawings, in which are shown by way of illustrations specific examples that may be practiced. It is to be understood that other examples may be utilized and structural changes may be made without departing from the scope of the respective examples.

[0022] The present invention relates to detecting the orientation of a stylus relative to a surface, such as azimuth and tilt. In one embodiment, touch detection may be performed by detecting capacitance at one or more locations on the stylus relative to the surface, and then using the capacitance(s) to determine the orientation of the stylus relative to the surface. The orientation of the pen relative to the contact surface (eg, touch panel). In some embodiments, the stylus can include a ring electrode configuration that can improve capacitive coupling between the ring electrode (for orientation detection) and the touch panel. In some emb...

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Abstract

A ring electrode to determine the orientation of the stylus relative to the surface. The stylus can include a ring electrode configuration which can improve capacitive coupling between the ring electrode and the touch panel. The ring electrode configuration can include a ring electrode and ground ring, and ground plate. By varying the lengths of ring electrode, ground ring, ground plate, and the distance between these elements, the electric field emanating from the ring electrode can be tuned to optimize the capacitive coupling between the ring electrode and surface. In some examples, the ringelectrode can include multiple sub-rings. In some examples, the ring electrode can comprise a crown shape including projections, each having a width that tapers to a minimum width along the length ofthe ring electrode.

Description

technical field [0001] This document relates generally to input devices for use with touch-sensitive devices, and more specifically, to the design of ring electrodes for active stylus. Background technique [0002] Many types of input devices are currently available for performing operations in computing systems, such as buttons or keys, mice, trackballs, joysticks, touch panels, touch screens, and the like. In particular, touch-sensitive devices and touch screens have become quite popular due to their ease and flexibility in operation, as well as their affordability. A touch-sensitive device may include a touch panel, which may be a transparent panel with a touch-sensitive surface, and a display device such as a liquid crystal display (LCD), which may be positioned partially or completely behind the panel such that the touch-sensitive surface At least a portion of the viewable area of ​​the display device may be covered. Touch-sensitive devices may allow a user to perform...

Claims

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Application Information

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IPC IPC(8): G06F3/0354G06F3/044H01G5/01
CPCG06F3/03545G06F3/0442G06F3/0443G06F3/0446H01G5/12H01G5/145G06F3/0383
Inventor P·班达里B·R·马歇尔L-Q·谭R·纳西瑞马哈拉提A·N·兹默曼R·P·布鲁克斯K·C·阿门达瑞兹
Owner APPLE INC
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