LED Driver IC Layout for Horizontal Scanning Backlights
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Solution Overview
Problem
Conventional driver IC layouts for LED backlight systems in media devices fail to provide horizontal scanning backlight without increasing layout complexity or routing difficulty, leading to issues like increased wire crossovers and manufacturing costs.
Innovation Solution
A redesigned layout configuration where each driver IC is connected to multiple LEDs in a row, utilizing a timing control unit to output control signals to different LEDs at different time periods, allowing for horizontal scanning backlight without additional complexity or routing issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If driver ICs are connected to multiple LEDs in separate horizontal zones using conventional layouts, then horizontal scanning backlight can be achieved, but layout complexity and routing difficulty increase
Solution Approach 1:
The patent divides the backlight into multiple horizontal zones, with each zone containing multiple LEDs that can be independently controlled. This segmentation allows the driver IC to control LEDs in different horizontal zones at different time periods, enabling horizontal scanning backlight without requiring complex inter-zone routing.
Solution Approach 2:
The patent transitions from controlling LEDs in a single horizontal zone to controlling LEDs across multiple horizontal zones by introducing a temporal dimension. The driver IC outputs control signals to different LEDs at different time periods, effectively using time as an additional dimension to achieve horizontal scanning without increasing spatial routing complexity.
2Ease of operation
If driver ICs are connected to multiple LEDs in separate horizontal zones, then horizontal scanning backlight can be achieved, but routing difficulty and wire crossovers increase
Solution Approach 1:
By segmenting the backlight into distinct horizontal zones with dedicated driver IC connections, the patent eliminates the need for complex wire crossovers between zones. Each driver IC connects to LEDs within its assigned horizontal zone, simplifying the routing structure while maintaining horizontal scanning functionality through temporal control.
Solution Approach 2:
The driver IC employs periodic control by outputting control signals to different LEDs at different time periods. This periodic action enables horizontal scanning backlight by sequentially activating LEDs in different horizontal zones without requiring complex physical routing connections between zones.
3Ease of manufacture
If conventional driver IC layouts are used, then manufacturing costs are reduced, but horizontal scanning backlight cannot be provided
Solution Approach 1:
The driver IC is designed with multi-functionality, capable of controlling multiple LEDs across different horizontal zones using a single integrated circuit. This universal design maintains manufacturing cost efficiency while enabling horizontal scanning backlight through internal timing control, eliminating the need for multiple separate driver ICs or complex external control circuits.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables efficient horizontal scanning backlight with reduced motion blur, improved image contrast, enhanced picture quality, and lower energy consumption while simplifying the layout and reducing manufacturing costs.
Implementation Method 1
the backlight apparatus can include first and second light-emitting diodes (LEDs) in a first horizontal zone and third and fourth LEDs in a second horizontal zone
Data Source
AI summary
Disclosed herein are system, apparatus, article of manufacture, method and/or computer program product embodiments, and/or combinations and sub-combinations thereof, for controlling a backlight apparatus in a media device with driver ICs. In some embodiments, the media device can include a display screen and the backlight apparatus. In some embodiments, the backlight apparatus can include first and second LEDs in a first horizontal zone and third and fourth LEDs in a second horizontal zone. The backlight apparatus can include a first driver IC connected to the first and third LEDs and configured to turn on the first LED during a first time period and the third LED during a second time period. The backlight apparatus can include a second driver IC connected to the second and fourth LEDs and configured to turn on the second LED during the first time period and the fourth LED during the second time period.