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Save power of a LED display device by using only part of the screen.

IP.com Disclosure Number: IPCOM000249136D
Publication Date: 2017-Feb-08
Document File: 3 page(s) / 50K

Publishing Venue

The IP.com Prior Art Database


Disclosed is a power saving feature in a device that uses LED for its display. The feature allows a user to select portion of the screen that needs to be visible and turn the display off on the rest of the screen. In the visible area, user can scroll the document by using the hand or eye gaze controller to reduce the manual effort to scroll. Thus, a user is able to use the LED device for longer time by consuming less power and effort.

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Save power of a LED display device by using only part of the screen .

There are many cases where the battery of a communication or media device (like mobile, tablet, etc.) reaches low power. There is a risk of a device loosing connectivity, mainly if there is no power charging point nearby. Hence, there is a need to use any device in low power saving mode. A device should be able to perform some actions by consuming very less power in this power saving mode. For a device with LED display, a user can use this power saving mode that will help him in long journeys.

This power saving feature allows a user to select a portion of a screen that needs to be powered ON in a LED device, thereby turning the power OFF for the rest of the screen. Additionally, to be able to scroll the selected powered section with less effort, an eye gaze controller can be used to scroll by following the user's eye movements.

This is how the solution works:

1. Using the hand (or eye gaze controller for a person without hands), select portion of the screen that needs to be visible. For example, a strip at the center of the screen which shows 5 lines.

2. The feature internally selects the set of diodes powering the selected section on the screen. It keeps only the selected diodes ON and turns OFF the remaining diodes around the selected area. User continues to use the LED device by using only the selected part of the screen and thus it saves his device power.

3. Using hand, a user can scroll the document, but since it is a small portion, user will have to constantly keep scrolling the document which can be frustrating. To eliminate manual scrolling of the small visible area by clicking or touch scrolling, an eye gaze trac...