DDI Chip On-Chip Memory Integration for Power Reduction
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Solution Overview
Problem
Existing display driver integrated circuit (DDI) chips face challenges in efficiently driving display panels due to power consumption and size constraints, particularly when using external memory for pixel compensation, which increases power usage and manufacturing costs.
Innovation Solution
Incorporating nonvolatile memory devices like MRAM and volatile memory devices like SRAM within the DDI chip, eliminating the need for external memory, and optimizing memory frequencies to reduce chip size and power consumption while improving integration and user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external memory is used for pixel compensation, then compensation functionality is achieved, but power consumption increases
Solution Approach 1:
The patent merges the pixel compensation memory function into the DDI chip itself by integrating a frame buffer memory and a compensation data memory directly in the chip. This eliminates the need for external memory devices, thereby reducing power consumption while maintaining the pixel compensation functionality through on-chip storage of compensation data for each pixel.
Solution Approach 2:
The patent segments the memory functions within the DDI chip by separating the frame buffer memory (for image data storage) from the compensation data memory (for pixel compensation). This segmentation allows independent optimization of each memory block's capacity and access patterns, enabling efficient pixel compensation without requiring external memory interfaces that would increase power consumption.
2Reliability
If external memory is used for pixel compensation, then compensation functionality is achieved, but manufacturing cost increases
Solution Approach 1:
The patent combines multiple functions (frame buffering, compensation data storage, and pixel compensation processing) into a single integrated DDI chip. This eliminates the need for separate external memory components, reducing assembly steps and manufacturing complexity while maintaining full pixel compensation functionality through on-chip memory resources.
3Reliability
If external memory is used, then compensation functionality is achieved, but device size increases
Solution Approach 1:
The patent integrates all necessary memory resources for pixel compensation directly within the DDI chip footprint. The frame buffer memory and compensation data memory are arranged to utilize the chip area efficiently, eliminating the need for external memory components and thereby reducing the overall device size while maintaining complete pixel compensation functionality.
Data Source
AI summary
A display apparatus includes a display panel; and a display driver integrated circuit (DDI) chip coupled to the display panel, the DDI chip being configured to generate a display driving signal for driving the display panel based on image data. The DDI chip may include: a first embedded memory device embedded in the DDI chip and configured to store compensation data for compensating for electrical and optical characteristics of a plurality of pixels included in the display panel; a timing controller configured to control signals for driving the display panel, and to generate a data control signal based on the image data and the compensation data; and a data driver configured to provide a data voltage to the display panel according to the data control signal. The first embedded memory device may not include static random access memory (SRAM).