Display Driving Circuit With Dynamic Gamma Voltage Boundaries
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Solution Overview
Problem
Existing display devices face challenges in reducing power consumption, particularly in handheld mobile phones, where the power voltage remains constant, leading to inefficiencies.
Innovation Solution
A display device with a power management circuit and display driving circuit that dynamically adjusts boundary and power voltages in response to system conditions, such as ambient brightness or operating mode changes, using a gamma voltage device and controller to transition voltages to lower levels when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power voltage remains constant to ensure stable display operation, then the reliability is improved, but the power consumption increases
Solution Approach 1:
The patent applies dynamics by transitioning from a static power voltage system to a dynamic one where the power voltage can be adjusted based on system conditions. The display driving circuit now actively modulates the power voltage level according to ambient brightness and operating mode, allowing the system to consume less power in low-demand scenarios while maintaining stability when needed.
Solution Approach 2:
The patent implements parameter changes by varying the power voltage level as a controllable parameter. Instead of maintaining a fixed voltage, the system changes the voltage parameter dynamically based on external conditions (ambient brightness) and internal state (operating mode), achieving power savings without compromising display performance when required.
2Use of energy by moving object
If the power voltage is dynamically adjusted to reduce power consumption, then the power consumption is reduced, but the device complexity increases
Solution Approach 1:
The display driving circuit is designed with multi-functionality, serving both its traditional role of driving the display panel and the additional function of controlling the power management circuit to adjust power voltage. This universal approach eliminates the need for a separate dedicated voltage control circuit, thereby reducing overall device complexity while achieving dynamic power management.
Solution Approach 2:
The patent merges the power voltage control function into the display driving circuit. By combining these two functions into a single integrated circuit, the system reduces the number of separate components and interconnections needed, thereby lowering device complexity despite the added functionality of dynamic voltage adjustment.
3Use of energy by moving object
If the boundary voltages are adjusted to optimize gamma voltage range, then the power consumption is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent implements feedback mechanisms to monitor and maintain accurate voltage levels during dynamic adjustment. By incorporating feedback control, the system can compensate for variations and maintain precise voltage levels even when adjusting boundary voltages to optimize power consumption, thereby meeting manufacturing precision requirements.
Data Source
AI summary
Disclosed are a display device, a display driving circuit thereof, and an operating method thereof. The display device includes a power management circuit and a display driving circuit. The display driving circuit converts a power voltage provided by the power management circuit into a first boundary voltage and a second boundary voltage, and generates multiple gamma voltages based on the first boundary voltage and the second boundary voltage. When a system condition transitions from a normal state to a specified state, the first boundary voltage transitions to a specified boundary level, and the power voltage transitions to a specified power level. When the system condition returns from the specified state to the normal state, the first boundary voltage returns to a normal boundary level, and the power voltage returns to a normal power level.