LCD Segment Control for Response Time Deviation
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Solution Overview
Problem
Liquid crystal display devices experience deviations in display due to differences in response times when turning segments on and off, particularly exacerbated by temperature changes, leading to reduced visibility and display quality.
Innovation Solution
A liquid crystal display device with a control part that changes turning-on patterns and applies dummy and delayed voltages to segments not commonly used in previous patterns, using a temperature sensor to adjust voltage application based on ambient temperature, ensuring synchronized segment activation and deactivation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a voltage is applied to segments not commonly used in the first segment group before changing from the second turning-on pattern to the third turning-on pattern, then the response time of segments is equalized and display deviations are prevented, but the device complexity increases due to additional voltage control requirements
Solution Approach 1:
The control part applies a voltage to segments not commonly used in the first segment group during a predetermined period before changing from the second turning-on pattern to the third turning-on pattern. This preliminary action equalizes the response time of segments by pre-activating them, ensuring synchronized display transitions and preventing display deviations caused by timing differences between segment responses.
2Productivity
If the turning-on pattern is changed directly from the first turning-on pattern to the second turning-on pattern, then the control is simple and fast, but display deviations occur due to different response times of segments
Solution Approach 1:
Before changing the turning-on pattern from the first to the second pattern, the control part applies a voltage to segments not commonly used in the first segment group during a predetermined period. This preliminary action ensures that all segments are ready to respond simultaneously when the pattern changes, maintaining both fast response speed and high display precision without direct switching.
Solution Approach 2:
The control part dynamically adjusts the voltage application timing based on the specific pattern transition being made. By applying voltages to different segment groups at different times depending on the transition requirements, the system optimizes both response speed and display precision for each specific pattern change scenario.
Data Source
AI summary
A liquid crystal display device includes a display part which has a plurality of divided segments and a control part, configured to control voltages applied to the segments. The control part changes a turning-on pattern of segments to be output to the display part from a first turning-on pattern which turns on a first segment group to a second turning-on pattern which turns on a second group, and subsequently to a third turning-on pattern which turns on a third segment group. Change of the turning-on pattern includes a control to apply a voltage to at least one of segments of the plurality of segments which are not commonly used in the first segment group in a period from a predetermined time before starting of change to the third turning-on pattern.