Backlight Refresh Rate Adjustment in LCD Displays
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Solution Overview
Problem
Current liquid crystal display (LCD) devices have a fixed refresh rate for their backlight units, limiting user flexibility in adjusting display quality for different applications or requirements, such as in animation where varying refresh rates can significantly impact display effects.
Innovation Solution
A display device comprising a display panel, a driver, a memory, and a controller that generates a frequency adjustment signal to adjust the duty cycle of the backlight control signal, allowing users to change the refresh rate of the backlight unit by selecting from pre-stored adjustment instructions, enabling dynamic adjustment of the backlight's drive frequency and control parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the refresh rate of the backlight unit is fixed, then the device structure is simple, but the adaptability to different applications is limited
Solution Approach 1:
The backlight refresh rate is changed from a fixed value to a dynamically adjustable parameter. The controller can switch between different refresh rates (e.g., 60Hz, 120Hz, 240Hz) based on application requirements, making the system adaptive to different usage scenarios such as general display, animation, or gaming without requiring multiple dedicated hardware configurations.
Solution Approach 2:
The patent implements adaptability by changing the operational parameters of the backlight unit. Specifically, the refresh rate parameter can be adjusted between different predefined values stored in memory, allowing the system to optimize display performance for different applications while maintaining a relatively simple hardware structure that supports multiple operating modes.
2Ease of operation
If the refresh rate is adjustable for different applications, then the flexibility and display quality are improved, but the control complexity increases
Solution Approach 1:
The system performs preliminary actions by pre-storing multiple refresh rate parameters and their corresponding control settings in memory before actual use. When a user selects a desired refresh rate, the controller directly retrieves the pre-configured parameters from memory, avoiding complex real-time calculations and simplifying the control process while maintaining user flexibility.
Solution Approach 2:
The control system provides self-service functionality by automatically selecting and applying the appropriate refresh rate parameters based on user input or application requirements. The controller manages the entire process of parameter selection, memory retrieval, and backlight adjustment without requiring manual intervention or complex external control mechanisms.
Data Source
AI summary
A display device includes a display, a driver, a memory, and a controller. The display includes a display panel and a backlight unit with a plurality of light-emitting elements to display an image. The driver is electrically connected to the display to transmit a backlight control signal to the backlight unit. The memory stores a plurality of adjustment instructions, and each adjustment instruction includes a drive frequency and a control parameter. The controller is electrically connected to the display, the driver, and the memory. The controller is configured to determine a drive frequency and a control parameter corresponding to the drive frequency in the memory according to a frequency adjustment signal, and then adjust the backlight control signal according to the control parameter, to change a duty cycle of the backlight control signal, so that a refresh rate of the backlight unit meets a requirement of a user.