Overlapping Backlight Blocks for Simplified Partial Driving
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Solution Overview
Problem
Existing display apparatuses with backlight systems require complex circuit configurations for partial driving control to enhance contrast, necessitating multiple control devices and drive circuits for each light-emission block.
Innovation Solution
The illumination unit and display apparatus employ a configuration with overlapping first and second light-emission blocks, each containing light-emitting devices arranged in different directions, allowing simplified light-emission control through shared control devices and drive circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple drive circuits and control devices are provided for each partial light-emission block to enable partial driving control, then light-emission control precision is improved, but device complexity increases
Solution Approach 1:
The backlight is divided into multiple partial light-emission blocks that can be independently controlled. Each block is assigned to a specific drive circuit, allowing selective illumination of different regions to enhance contrast while managing control complexity through spatial segmentation
Solution Approach 2:
A single drive circuit is designed to control multiple light-emission blocks simultaneously. The drive circuit performs dual functions by managing both first light-emission blocks and second light-emission blocks, reducing the total number of control devices needed while maintaining precise control over all blocks
2Device complexity
If the number of control devices is reduced to simplify circuit configuration, then device complexity is reduced, but light-emission control precision deteriorates
Solution Approach 1:
Multiple light-emission blocks are merged under the control of a single drive circuit. The drive circuit integrates control signals for both first and second light-emission blocks, achieving circuit simplification while preserving the ability to independently control each block's light emission through coordinated signal management
Data Source
AI summary
An illumination unit according to the present disclosure includes a plurality of first light-emission blocks, a plurality of second light-emission blocks, and a light-emission controller. The first light-emission blocks each include a plurality of first light-emitting devices arranged in a first direction. The second light-emission blocks are partially overlapped with the respective first light-emission blocks, and each include a plurality of second light-emitting devices arranged in a second direction different from the first direction. The light-emission controller performs light-emission control of the first light-emitting devices for each of the first light-emission blocks, and performs the light-emission control of the second light-emitting devices for each of the second light-emission blocks.