Organic Light Emitting Display Device Block Emission Control
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Solution Overview
Problem
Existing organic light emitting display devices operate at high driving frequencies, leading to increased power consumption, reduced stability, and higher manufacturing costs, while also experiencing luminance differences at block interfaces due to differing data-recording and emission times.
Innovation Solution
The organic light emitting display device is divided into multiple blocks with dedicated emission drivers supplying emission control signals to emission control lines, allowing for synchronized and simultaneous signal supply across blocks, thereby maintaining consistent emission control signal widths and reducing luminance differences, and operates at a lower driving frequency of 120 Hz.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the display device operates at high driving frequency, then the response speed is improved, but power consumption increases and stability decreases
Solution Approach 1:
The pixel unit is divided into multiple blocks, with each block having its own emission driver. This segmentation allows different blocks to operate at different times, enabling the display to maintain fast response when needed while reducing overall power consumption by activating only necessary blocks during each frame period.
Solution Approach 2:
The emission drivers operate periodically with different timing - the first emission driver operates during a first period while the second emission driver operates during a second period that does not overlap with the first period. This periodic, non-overlapping operation reduces instantaneous power consumption while maintaining the required response speed through sequential updates.
2Use of energy by moving object
If the pixel unit is divided into multiple blocks with different emission timing, then power consumption is reduced, but luminance differences occur at block interfaces
Solution Approach 1:
Different blocks are assigned different emission timing characteristics - the first block uses a first emission period while the second block uses a second emission period. By carefully designing the data signal timing and emission control for each block, the patent achieves local optimization where each block maintains appropriate luminance characteristics while contributing to overall power reduction.
Solution Approach 2:
The data signals are supplied to different blocks at different times - the first data signal is supplied before the first emission period, and the second data signal is supplied before the second emission period. This preliminary action ensures that each block is fully prepared for its emission period, preventing luminance inconsistencies at block interfaces while maintaining the power-saving non-overlapping emission structure.
3Ease of manufacture
If emission control signals are supplied sequentially to all blocks, then manufacturing cost is reduced, but the driving frequency must be increased to maintain response speed
Solution Approach 1:
Instead of using a single emission driver for all blocks, the patent divides the pixel unit into multiple blocks, each with its own emission driver. This segmentation allows each driver to control fewer lines simultaneously, reducing the complexity and cost of each individual driver while maintaining overall system performance through coordinated operation.
Solution Approach 2:
The multiple emission drivers operate in a periodic, non-overlapping manner where the first emission driver operates during a first period and the second emission driver operates during a second period. This periodic operation allows the system to maintain fast effective response speed through sequential updates while using simpler, lower-cost drivers that don't need to handle all blocks simultaneously.
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 configuration enables the display of 3D images without cross-talk, reduces power consumption, and improves stability by maintaining consistent emission states across blocks, while operating at a lower driving frequency, thus addressing the limitations of high-frequency operations.
Implementation Method 1
The light emitting diodes emit light by recombining electrons and holes
Data Source
AI summary
An organic light emitting display device of the present embodiments includes: a plurality of pixels positioned at intersections of scan lines, data lines, and emission control lines; a pixel unit, including the plurality of pixels, and divided into two or more blocks; a scan driver sequentially supplying scan signals to the scan lines; a data driver supplying data signals to the data lines in synchronization with the scan signals; and two or more emission drivers connected with emission control lines in the blocks, in which each emission driver supplies emission control signals to emission control lines connected thereto, and at least one or more emission control signals are supplied in each block simultaneously.