Backlight Module Rotation Control for Display Mosaic Elimination

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Solution Overview

Problem

Portable electronic devices experience frame sticking or mosaic phenomena due to limited hardware efficiency when rotated, causing visual segmentation and discomfort in operation.

Innovation Solution

A displaying method that involves turning off the backlight module during rotation, waiting for a predetermined time period, and then turning it back on, which can include gradual dimming and lighting of the display panel, managed by the BIOS, embedded controller, and storage device without requiring additional components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If the portable electronic device is rotated quickly, then the rotation response speed is improved, but frame sticking or mosaic phenomenon occurs due to limited hardware efficiency

Engineering Contradiction:

Improverotation response speedVSAvoiddisplay quality

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The system performs preliminary actions by turning off the backlight module before the frame rendering is complete, and turns it back on after the frame is ready. This preliminary timing adjustment allows the rotation to complete without displaying the intermediate mosaic state, resolving the contradiction between fast rotation response and display quality.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent converts the harmful effect of frame sticking into a beneficial timing mechanism. By detecting the rotation event and using it to trigger the backlight off-on sequence, the system transforms the problematic mosaic phenomenon into a controlled transition where the backlight state change masks the frame rendering delay, maintaining both speed and quality.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Reliability

If the backlight module is turned off and on during rotation, then frame sticking phenomenon is eliminated, but energy consumption increases due to repeated switching

Engineering Contradiction:

Improvedisplay qualityVSAvoidbacklight energy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The backlight module maintains continuous useful action by being turned off during the brief frame rendering period and immediately turned back on when the frame is ready. This continuous control ensures display quality is maintained throughout the rotation process while minimizing energy consumption by keeping the backlight off only during the necessary transition period.

Inventive Principle:

Principle #20Continuity of useful action

3Productivity

If the frame is re-arranged quickly during rotation, then the rotation efficiency is improved, but visual segmentation is felt by the user

Engineering Contradiction:

Improveframe rearrangement efficiencyVSAvoiduser comfort

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The backlight module serves as an intermediary element that mediates between the frame rearrangement process and the user's visual perception. By controlling the backlight state during rotation, it allows the frame to be rearranged quickly for high efficiency while preventing the user from perceiving the intermediate visual segmentation, thus maintaining user comfort.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS8717276B2Displaying method and portable electronic device using the same

Publication Date: 2014.05.06 PEGATRON

AI summary

A displaying method used in a portable electronic device is provided. The portable electronic device includes a display panel having a backlight module. The displaying method includes the following steps: turning off the backlight module when a rotation event occurs; waiting for a time period; turning on the backlight module.