Shutter Glasses Sync Signal Interference Control
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Solution Overview
Problem
Shutter glasses used for 3D displays face interference issues with sync signals due to external electronic devices, leading to omitted pulses and potential errors in image synchronization.
Innovation Solution
Incorporating a shutter-glasses controller that receives a sync signal with omitted pulses, analyzes the pattern, and generates an ON/OFF driving signal to adjust light transmittance for the left-eye and right-eye lens units, restoring omitted syncs to ensure proper synchronization and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shutter glasses use a sync signal transmitted from the display apparatus to control light transmittance, then the 3D image display synchronization is achieved, but interference with other electronic devices occurs and sync pulses may be omitted
Solution Approach 1:
The patent implements periodic omission of sync pulses at predetermined intervals. Instead of continuously transmitting sync signals, the system omits pulses periodically to reduce interference with other electronic devices while maintaining synchronization through the remaining pulses and predictive generation of omitted ones.
Solution Approach 2:
The shutter glasses controller receives sync signals, analyzes their patterns, and generates predictive ON/OFF driving signals. The controller feedback-adjusts the light transmittance of lens units based on the received sync signal pattern, ensuring proper synchronization even when pulses are omitted or interfered with.
2Measurement precision
If sync pulses are transmitted continuously to maintain synchronization, then image timing accuracy is improved, but power consumption increases
Solution Approach 1:
The system transitions from continuous sync pulse transmission to periodic transmission with deliberate omissions. The display apparatus and shutter glasses controller coordinate to omit pulses at predetermined intervals, reducing the total number of transmitted signals and thus lowering power consumption while maintaining timing accuracy through predictive generation.
Solution Approach 2:
The shutter glasses controller performs preliminary analysis of the sync signal pattern and predictively generates the ON/OFF driving signals in advance. This preliminary action allows the system to prepare for omitted pulses beforehand, ensuring timing accuracy is maintained without requiring continuous pulse transmission.
3Ease of operation
If the shutter glasses controller generates ON/OFF driving signals based on received sync signals, then light transmittance control is achieved, but omitted sync pulses cause errors in image synchronization
Solution Approach 1:
The controller performs preliminary pattern analysis of the received sync signal and predictively generates complete ON/OFF driving signals even for sections where sync pulses are omitted. This preliminary generation ensures that the light transmittance control remains accurate and reliable despite the omitted pulses.
Solution Approach 2:
The controller continuously monitors the received sync signal pattern and adjusts the generation of ON/OFF driving signals accordingly. The feedback mechanism ensures that omitted pulses are compensated for by predictive generation, maintaining synchronization accuracy while enabling effective light transmittance control.
Data Source
AI summary
The shutter glasses for the display apparatus include a shutter-glasses communication unit which receives a first sync signal from the display apparatus displaying a three-dimensional (3D) image; and a shutter-glasses controller which generates an ON/OFF driving signal for a left-eye lens unit and a right-eye lens unit of the shutter glasses based on the first sync signal, the first sync signal including a pattern, based on which at least one sync pulse is periodically omitted in a second sync signal used in displaying the 3D image according to a frame driving frequency of the 3D image. The shutter-glasses controller generates an ON/OFF driving signal in sync with the first sync signal, so that the ON/OFF driving signal includes the sync pulse in a section corresponding to the omitted sync pulse of the second sync signal according to a time period of the first sync signal.