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Method for a delay in screen saver activation using a keyboard IR input

IP.com Disclosure Number: IPCOM000008168D
Publication Date: 2002-May-22
Document File: 3 page(s) / 478K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for a delay in screen saver activation using a keyboard infrared (IR) input. Benefits include improved functionality and improved end-user satisfaction.

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Method for a delay in screen saver activation using a keyboard IR input

Disclosed is a method for a delay in screen saver activation using a keyboard infrared (IR) input. Benefits include improved functionality and improved end-user satisfaction.

General description

      The disclosed method describes an addition to a PC keyboard consisting of an IR sensor placed on the front of a keyboard to detect close-range movement. The IR sensor is connected to the microcontroller, which determines if the person is near the keyboard, and periodically sends a signal to the PC. The screen saver is not activated until the person leaves the PC. This method greatly reduces user annoyance due to unexpected screen saver activation because the keyboard is not touched for a few minutes.

      The disclosed method is completely contained in the keyboard, requiring no addition/modification to the PC or to the PC operating system or software.

Advantages

      The disclosed method reduces user annoyance when a screen saver activates because input has not been received for some time. No change to the PC or software is required.

Detailed description

      The disclosed method is comprised of two basic hardware blocks: the IR sensor circuitry, and rest of the circuitry, which is digital and includes the keyboard microcontroller.

      The basic circuitry consists of a fresnel lens, through which the IR rays are transmitted onto a pyroelectric sensor (see Figure 1). The sensor is sensitive to radiation over a wide range so a filter window can be added to limit incoming radiation to the 8 to 14 mm range, which is most sensitive to human body radiation. Typically, the field-effect...