Head-Mounted Multi-Panel Display Synchronization for Screen Alignment
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Solution Overview
Problem
Existing head-mounted devices with multiple display panels often suffer from deviations in screen display due to misalignment or positional discrepancies, leading to visual discomfort and impaired user experience in augmented or mixed reality environments.
Innovation Solution
A head-mounted device with multiple display panels is equipped with a first and second display driving circuit, and a processor that adjusts the light emitting timing of each panel based on deviations detected between the screens displayed by these panels, using processing circuitry to modify screen input data and synchronize the display timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple display panels are used in head-mounted devices, then the field of view and display area are improved, but screen alignment and visual consistency deteriorate due to positional deviations between panels
Solution Approach 1:
The system detects the actual positional deviation between display panels through calibration processes and feeds this information back to the processor. The processor then uses this feedback to dynamically adjust the display content positioning, ensuring that screens remain aligned despite manufacturing tolerances or wear over time.
Solution Approach 2:
The system changes display parameters such as horizontal/vertical positioning offsets, scaling factors, and rotation angles based on detected deviations. By dynamically adjusting these parameters, the system compensates for misalignment between panels and maintains visual consistency across the combined display area.
2Stability of the object's composition
If display panels are fixed in position, then device stability is improved, but adaptability to individual user differences deteriorates
Solution Approach 1:
The system performs preliminary calibration actions when the device is first used or when needed, measuring the specific positional relationships and user characteristics. This preliminary data is stored and used to pre-adjust display parameters, allowing the fixed physical structure to adapt to individual users without requiring physical reconfiguration.
Solution Approach 2:
While the physical display panels remain fixed in position, the system introduces dynamic adjustment capabilities through software-controlled parameter changes. The display content positioning, scaling, and timing can be dynamically modified based on user-specific calibration data, enabling adaptability within a fixed hardware configuration.
3Reliability
If screen input data is modified to compensate for deviations, then visual consistency is improved, but processing complexity increases
Solution Approach 1:
The system segments the display correction process into distinct components: deviation detection, parameter calculation, and individual panel adjustment. Each display panel has its own set of correction parameters (horizontal offset, vertical offset, scaling), allowing independent optimization without requiring complex inter-panel coordination.
Solution Approach 2:
The processor acts as an intermediary that receives the original display content, applies calculated correction parameters, and outputs adjusted content to each panel. This intermediary processing layer simplifies the overall system by centralizing the correction logic and avoiding the need for direct communication or coordination between display panels.
Data Source
AI summary
A head mounted device may include: a first display panel having a fixed location; a second display panel having a fixed location; a first display driving circuit configured to drive the first display panel; a second display driving circuit configured to drive the second display panel; and at least one processor comprising processing circuitry. At least one processor may be configured to: provide screen input data to the first display driving circuit and the second display driving circuit; acquire a deviation between a screen displayed through the first display panel and a screen displayed through the second display panel, on the basis of the provided screen input data; correct at least a portion of the screen input data input to at least one of the first display driving circuit or the second display driving circuit, on the basis of the acquired deviation; and modify an emission timing of at least one of the first display panel or the second display panel, based on the modification of at least a portion of the screen input data.