Display Timing Control for Higher Grayscale Without More Lanes
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Solution Overview
Problem
Existing image display apparatuses face limitations in enhancing grayscale expression power due to constraints in data bit transmission and frequency, particularly when increasing display resolution and peak luminance, without increasing the transmission lane of the image signal.
Innovation Solution
The image display apparatus includes a signal processing device that outputs a data enable signal divided into active and blank periods, adjusting their lengths based on data bits and vertical synchronization signal frequencies to enhance grayscale expression power without changing the transmission lane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the data bit of the image signal is increased to enhance grayscale expression power and display resolution, then the image quality is improved, but the transmission frequency limit is exceeded
Solution Approach 1:
The patent dynamically adjusts the length of the active period and blank period in the data enable signal based on the data bit requirements. When higher data bits are needed for enhanced grayscale expression, the active period is extended to accommodate the additional data transmission within the same frequency constraints, resolving the contradiction between transmission frequency limits and grayscale expression power.
Solution Approach 2:
The patent changes the temporal parameters of the data enable signal (active period length, blank period length) to match the data bit requirements. By adjusting these parameters, the system can transmit higher data bits without exceeding transmission frequency limits, thereby improving grayscale expression power while maintaining frequency constraints.
2Measurement precision
If the active period is extended to transmit more data bits, then the grayscale expression power is enhanced, but the power consumption increases
Solution Approach 1:
The patent dynamically adjusts the active period length based on the actual data bit requirements. When high grayscale expression power is needed, the active period is extended; when lower precision suffices, the active period is shortened to reduce power consumption. This dynamic adaptation resolves the contradiction between grayscale expression power and power consumption.
Solution Approach 2:
The patent changes the active period parameter of the data enable signal to match the required data transmission volume. By optimizing this parameter, the system achieves the necessary grayscale expression power while minimizing power consumption by avoiding unnecessarily long active periods when fewer data bits are required.
3Quantity of substance
If the transmission lane is increased to handle higher data bits, then the data transmission capacity is improved, but the device complexity increases
Solution Approach 1:
Instead of increasing the number of transmission lanes (spatial dimension), the patent utilizes the time dimension by extending the active period of the data enable signal. This allows higher data bits to be transmitted through the same transmission lane over a longer duration, improving data transmission capacity without increasing device complexity.
Solution Approach 2:
The patent changes the temporal parameter (active period length) of the existing transmission lane to increase data transmission capacity. By adjusting this parameter, the system can accommodate higher data bits without adding more transmission lanes, thereby avoiding increased device complexity.
Data Source
AI summary
Disclosed is an image display apparatus. An image display apparatus according to an embodiment of the present disclosure includes: a panel; a signal processing device configured to process an input image and output an image signal; and a timing controller configured to drive the panel based on the image signal from the signal processing device, and the signal processing device is configured to output a data enable signal divided into an active period and a blank period, and change a length of the active period or a length of the blank interval in response to a data bit of the image signal being changed. Accordingly, a grayscale expression power when displaying an image can be enhanced.