Segmented Light Emission Driving for Display Devices
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Solution Overview
Problem
Existing flat-type display devices, such as organic EL display devices, face challenges in achieving both improved light emission luminance and increased frame rate while controlling moving image blur, as traditional line sequential driving methods result in delayed timing for the last scanning line, leading to image blur, and global light emission driving compromises frame rate for sufficient luminance.
Innovation Solution
A display device configuration that includes a pixel array unit with light emitting units, a writing scanning unit, and a light emission driving unit that divides the display screen into multiple units in the scanning direction, allowing for simultaneous light emission driving across these units, thereby reducing phase differences and optimizing light emission periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rolling light emission driving is used, then moving image blur is reduced, but frame rate increases and light emission luminance decreases
Solution Approach 1:
The display screen is divided into multiple light emission driving units in the scanning direction, allowing simultaneous light emission driving for multiple lines. This segmentation enables parallel processing of light emission across different line segments, increasing the frame rate while maintaining sufficient light emission luminance for each segment.
2Reliability
If global light emission driving is used, then moving image blur is reduced, but frame rate decreases to secure light emission period
Solution Approach 1:
The display screen is divided into multiple light emission driving units, enabling simultaneous light emission driving across multiple segments. This parallel execution of light emission driving for different segments allows the system to achieve global light emission效果 while maintaining a high frame rate, as multiple segments can be driven concurrently rather than sequentially.
3Reliability
If global light emission driving is used, then moving image blur is reduced, but light emission luminance decreases due to insufficient light emission period
Solution Approach 1:
The display screen is divided into multiple light emission driving units, allowing simultaneous light emission driving for multiple lines across different segments. This parallel processing approach extends the effective light emission period by overlapping light emission across segments, thereby securing sufficient light emission luminance while maintaining the global light emission benefit of reduced moving image blur.
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 both enhanced light emission luminance and increased frame rate while minimizing moving image blur, by ensuring sufficient light emission periods without the need for reduced frame rates, thus addressing the limitations of traditional driving methods.
Implementation Method 1
an organic EL element using electro luminescence (EL) of an organic material and using a phenomenon in which light is emitted when an electric field is applied to an organic thin film
Data Source
AI summary
A display device of the present disclosure includes: a pixel array unit in which pixels respectively including light emitting units are arranged; a writing scanning unit that writes a video signal while scanning each of the pixels of the pixel array unit in units of pixel rows; and a light emission driving unit that divides a display screen into a plurality of units in a scanning direction in units of the pixel rows, and performs light emission driving for each of the divided units.