PMOS Light Emission Driver for OLED Power Reduction
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Solution Overview
Problem
Existing OLED display devices experience increased power consumption due to unnecessary power usage in non-display areas, which complicates the driving process and increases overall energy expenditure.
Innovation Solution
A display device configuration utilizing PMOS transistors for driving, with a light emission driver that selectively applies voltage levels to light emitting signal lines based on a partial driving mode and area selection signals to differentiate between display and non-display areas, reducing power consumption and simplifying the production process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If scan lines and data lines corresponding to non-display area are applied with scan signals and data signals like display area, then the display device can maintain uniform driving structure, but unnecessary power consumption increases
Solution Approach 1:
The display panel is divided into display area and non-display area, with different driving strategies applied to each. The non-display area pixels are selectively powered off by controlling the light emission driver to output only off voltage levels to light emitting signal lines corresponding to non-display area, while display area pixels continue normal operation. This segmentation resolves the contradiction by allowing uniform driving structure in terms of circuit design while applying differentiated voltage control to eliminate unnecessary power consumption in non-display regions.
2Ease of manufacture
If a driver configuration using only PMOS transistors is implemented, then the production process is simplified, but the driving capability must be maintained for both normal and partial driving modes
Solution Approach 1:
The light emission driver utilizes parameter changes in voltage levels (on voltage level and off voltage level) to achieve different driving modes. By controlling the voltage output levels to light emitting signal lines based on area selection signals, the PMOS-only driver configuration can differentiate between display and non-display areas, enabling partial driving mode to reduce power consumption while maintaining normal driving capability when needed.
Solution Approach 2:
The PMOS transistor-based driver circuit is designed to perform multiple functions: normal driving mode for full display operation and partial driving mode for power-saving operation in non-display areas. The same driver structure handles both modes by responding to area selection signals and adjusting voltage output levels accordingly, eliminating the need for separate driver circuits for different driving modes and simplifying the production process.
Data Source
AI summary
A display device and a driving method to reduce power consumption, and to simplify the process of manufacturing the display device by configuring a driver made of PMOS transistors, is disclosed. The display device includes a display unit and a light emission driver. The display unit includes scan lines for transmitting scan signals, data lines for transmitting data signals, light emitting signal lines for transmitting light emitting signals, and pixels coupled to the scan lines, data lines, and light emitting signal lines. The light emission driver is for receiving a partial driving selection signal for selecting one of a normal driving mode or a partial driving mode, an area selection signal for dividing the display unit into a display area and a non-display area, a synchronization signal generated in synchronization with a vertical synchronization signal, and first and second light emitting clock signals, for outputting the light emitting signals.