Display device
US-2024272501-A1 · Aug 15, 2024 · US
Capacitive sensor system with noise reduction
US8941394B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8941394-B2 |
| Application number | US-89508710-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 30, 2010 |
| Priority date | Jun 25, 2008 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A system for reducing noise when detecting the capacitance value of a capacitor in a touch display that operates in a potentially noisy environment. A capacitance sensor is provided for determining the size of the capacitor in the touch screen display and includes a charging circuit that charges the capacitor and a discharge circuit that resets the charge of the capacitor to substantially zero. A control circuit controls the capacitance sensor and the operation of the charge and discharge circuits in accordance with a predetermined charging/discharging algorithm to resolve the value of the capacitor and output such value in a sampling operation. The operation of the control circuit and the charging/discharging algorithm is subject to errors as a function of the noisy environment, which errors will be reflected in the output value. A noise reduction circuit is provided to modify the operation of the control circuit to reduce noise.
First claim
Opening claim text (preview).
What is claimed is: 1. A system for reducing noise when detecting a capacitance value of a capacitor in a touch display that operates in a potentially noisy environment, comprising: a capacitance sensor for determining a size of the capacitor in the touch screen display and the capacitor sensor including a charging circuit that charges the capacitor and a discharge circuit that resets the charge of the capacitor to substantially zero; a control circuit that controls the capacita…
Assignees
Inventors
Classifications
Physics · mapped topic
- G06F3/0418Primary
Physics · mapped topic
- G06F3/044Primary
Physics · mapped topic
Physics · mapped topic
Patent family
Related publications grouped by family.
External sources
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US8941394B2 cover?
- A system for reducing noise when detecting the capacitance value of a capacitor in a touch display that operates in a potentially noisy environment. A capacitance sensor is provided for determining the size of the capacitor in the touch screen display and includes a charging circuit that charges the capacitor and a discharge circuit that resets the charge of the capacitor to substantially zero.…
- Who is the assignee on this patent?
- Martin Bradley, Wei Dazhi, Silicon Lab Inc
- What technology area does this patent fall under?
- Primary CPC classification G06F3/0418. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 27 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).