Display Backlight Scan Group Control for Fewer Substrate Lines
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Solution Overview
Problem
The increasing number of light sources in display apparatuses leads to a rise in the complexity and cost of manufacturing processes due to the increased number of lines connected to the substrate, complicating the manufacturing process and driving elements.
Innovation Solution
A light source device is configured to group driving elements into scan groups, with a controller determining the transmission time points and cycles of scan and data signals based on the number of scan groups, reducing the number of data lines and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of light sources is increased to improve image quality and contrast ratio, then the display performance is improved, but the number of lines connected to the substrate increases, leading to increased manufacturing complexity and costs
Solution Approach 1:
The driving elements are divided into multiple scan groups, with each group controlled by dedicated scan lines. This segmentation allows the system to manage a large number of light sources through organized groups rather than individual connections, reducing the overall line complexity while maintaining control over each light source for high-quality display output
Solution Approach 2:
The patent introduces a time dimension by implementing sequential scanning across different scan groups. Instead of requiring all light sources to be controlled simultaneously through separate lines, the system scans through groups in sequence, effectively reducing the number of lines needed at any given moment while still controlling all light sources
2Reliability
If the number of light sources is increased to achieve high contrast ratios, then the display performance is improved, but the number of lines increases, driving up manufacturing costs
Solution Approach 1:
By segmenting driving elements into scan groups with shared scan lines, the patent reduces the total number of lines required to control a large array of light sources. This segmentation maintains the ability to control each light source individually for high contrast ratios while significantly reducing manufacturing complexity and associated costs
Solution Approach 2:
Each scan line serves multiple driving elements within its scan group, making the scan lines universal rather than dedicated to single elements. This multi-functionality allows the system to control numerous light sources with fewer lines, reducing manufacturing costs while maintaining the capability to achieve high contrast ratios through precise control
Data Source
AI summary
There is provided a light source device and a display apparatus with the light source device including scan groups each including a driving element for controlling at least one light source, a plurality of scan lines configured to transmit scan signals to the plurality of scan groups, a data line configured to transmit a data signal to the plurality of scan groups, and a controller configured to determine a generation time point of the scan signal and a cycle of the data signal based on a number of scan groups.