OLED Driving Circuit Separates Display and Brightness Data Lines
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Solution Overview
Problem
Organic electroluminescent devices experience a screen pause phenomenon when brightness control data is inputted, causing temporary discontinuation of light emission due to the simultaneous input of display and brightness control data through a single line.
Innovation Solution
The solution involves a data driving circuit that separates the input lines for display data and brightness control data, using a display data recognizing circuit and a current generating circuit to apply data currents accordingly, ensuring continuous input of display data by dividing the lines for display and brightness control data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If display data and brightness control data are input through a single line, then device complexity is reduced, but screen pause phenomenon occurs when brightness control data is inputted
Solution Approach 1:
The patent divides the input interface into two separate lines: one for display data and another for brightness control data. This segmentation allows independent transmission of data types, preventing the screen pause phenomenon that occurs when brightness control data interrupts display data input through a shared line.
2Ease of operation
If display data and brightness control data share a single input line, then ease of operation is improved, but productivity decreases due to screen pauses
Solution Approach 1:
The input interface is segmented into separate channels for display data and brightness control data. This allows the system to maintain ease of operation while eliminating productivity losses caused by screen pauses during brightness adjustments.
Solution Approach 2:
By providing separate input lines, the patent ensures continuous transmission of display data while brightness control data can be input independently. This maintains the continuity of light emission and prevents interruptions in the display function.
3Device complexity
If a single line is used for both display data and brightness control data, then device complexity is reduced, but loss of time occurs due to screen pause phenomenon
Solution Approach 1:
The patent implements separate input lines for display data and brightness control data, eliminating the time loss associated with screen pause phenomenon while maintaining reasonable device complexity through a straightforward dual-line architecture.
Solution Approach 2:
The segmented input structure enables continuous display data transmission independent of brightness control data input, eliminating time interruptions and ensuring uninterrupted light emission during brightness adjustments.
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 prevents the screen pause phenomenon by allowing continuous data input and maintaining light emission even when brightness control data is changed, thereby eliminating temporary screen pauses.
Implementation Method 1
Each of the pixels E11 to E44 is formed with an anode electrode layer, an organic layer and a cathode electrode layer, and emits a light having a certain wavelength when a positive voltage is applied to the anode electrode layer, and a negative voltage is applied to the cathode electrode layer.
Data Source
AI summary
The present invention relates to an organic electroluminescent device and a driving method thereof. The organic electroluminescent device according to the present invention comprises a plurality of scan lines in a first direction, a plurality of data lines in a second direction different from the first direction, a panel having a plurality of pixels formed on crossing areas of data lines and scan lines, and a data driving circuit which drives the pixels according to a display data and a brightness control data inputted from external apparatuses. The data driving circuit comprises a display data recognizing circuit which receives display data from a first external apparatus in the external apparatuses and a current generating circuit which receives brightness control data from a second external apparatus in the external apparatuses, and applies a data current according to the display data recognized in the display data recognizing circuit and the brightness control data to the data lines.