OLED Drive Power Supply Integrated Control Chip
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Solution Overview
Problem
Existing OLED drive power supplies have complex architectures and large power supply boards due to high power requirements, leading to increased volume and production costs, particularly in OLED televisions where power output stability and timing control are critical.
Innovation Solution
Integration of a bridgeless PFC and auxiliary path LLC control circuit into a single control chip, omitting a special standby circuit, and using a power supply circuit with conversion modules and switches to manage power output efficiently, reducing the power supply board area and production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-path independent control output architecture is adopted to meet OLED power requirements, then power output stability and timing control are improved, but device complexity and power supply board area increase
Solution Approach 1:
The patent merges the PFC control circuit and auxiliary path LLC control circuit into a single integrated control chip. This consolidation maintains the necessary independent control functions for power stability while reducing the number of separate control components, thereby simplifying the overall circuit architecture without compromising reliability
Solution Approach 2:
The integrated control chip performs multiple functions including PFC control, auxiliary path LLC control, and timing sequence control. By designing a universal controller that handles multiple control tasks, the patent reduces device complexity while maintaining the sophisticated power management required for OLED stability
2Reliability
If a multi-path independent control output architecture is adopted to meet OLED power requirements, then power output stability and timing control are improved, but power supply board area increases
Solution Approach 1:
By combining multiple control circuits into one integrated chip, the physical space required on the power supply board is significantly reduced. The consolidation eliminates the need for separate control ICs and their associated peripheral components, directly addressing the board area issue while preserving power stability
3Ease of operation
If a special standby circuit is included to manage power sequencing, then timing control is improved, but device complexity and production cost increase
Solution Approach 1:
The integrated control chip incorporates timing control functionality alongside PFC and LLC control functions. This multi-functional design eliminates the need for a separate standby circuit while maintaining precise timing control, thereby reducing device complexity without sacrificing operational ease
4Ease of operation
If a special standby circuit is included to manage power sequencing, then timing control is improved, but production cost increases
Solution Approach 1:
By merging the timing control functions into the integrated control chip that also handles PFC and LLC control, the patent reduces the total component count. This consolidation simplifies the manufacturing process and reduces production costs while maintaining the necessary timing control capabilities for power sequencing
Data Source
AI summary
An OLED drive power supply includes a power supply board connected to a main board and OLED screen, the power supply board includes a power supply circuit, first conversion module, second conversion module and switch; after powering on, the power supply circuit starts the first conversion module to output high-voltage DC to second conversion module, output first voltage and second voltage to power main board, switch converts first voltage to first enabling voltage to power OLED screen; after preset time, main board outputs second enabling signal to power supply circuit, to control second conversion module to start and output second enabling voltage to power and light OLED screen, first conversion module comprises bridgeless PFC circuit and auxiliary path LLC control circuit integrated into same semiconductor chip encapsulation, and omitting specific standby circuit, circuit structure is simplified, area of power supply board is reduced, and production cost is reduced.