Modular Display Panel Gap Compensation via Dynamic Brightness Control
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Solution Overview
Problem
Gaps between panels in modular display devices cause uneven luminous element spacing, leading to distracting irregularities in image brightness due to component tolerances, aging, thermal expansion, and environmental factors, which are difficult to maintain consistently.
Innovation Solution
A display device that uses a psycho-optical effect to dynamically adjust the brightness of lighting elements based on measured gap widths, increasing brightness near gaps that are too large and reducing brightness near gaps that are too small, using a driver to scale the image signal accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the gap width between panels is reduced to minimize visibility, then image quality improves, but component tolerances and thermal expansion cause the gap to vary, leading to brightness irregularities
Solution Approach 1:
The patent dynamically changes the brightness parameter of lighting elements based on the measured gap width. When gaps are larger than average, nearby lighting elements are brightened; when gaps are smaller, nearby elements are dimmed. This parameter adjustment compensates for gap variations and maintains uniform image brightness perception.
Solution Approach 2:
The patent implements a feedback mechanism where sensors continuously measure the actual gap width between panels, and this measurement is used to adjust the brightness of lighting elements. The system monitors gap variations caused by thermal expansion, component aging, or assembly tolerances and automatically compensates by modifying lighting element output, creating a closed-loop control system.
2Reliability
If the gap width is increased to accommodate component tolerances and thermal expansion, then reliability improves, but the gap becomes more visible and image quality deteriorates
Solution Approach 1:
The patent converts the harmful effect of visible gaps into a benefit by using the gap width information to adjust lighting element brightness. The larger gaps that would normally create dark lines are compensated by brightening nearby elements, while smaller gaps that create bright lines are compensated by dimming nearby elements. This transforms the problem of gap visibility into an opportunity for dynamic brightness optimization.
3Illumination intensity
If brightness compensation is applied to lighting elements near gaps, then gap visibility is reduced, but the lighting elements may be overdriven and damaged
Solution Approach 1:
The patent applies partial compensation by adjusting the brightness of only those lighting elements that are adjacent to gaps, rather than uniformly adjusting all elements. The brightness adjustment is proportional to the gap width deviation, applying just enough compensation to reduce visibility without excessive brightening that would cause overdriving or damage to the lighting elements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Reduces the visibility of gaps between panels by dynamically controlling lighting element brightness, ensuring consistent image quality despite variations in gap width due to component tolerances and environmental factors.
Implementation Method 1
The measuring device (6) has at least one sensor (7) for measuring the gap width (di) between the two panels (P i , P i+1 )
Implementation Method 2
The sensor (7) is an optical sensor, a capacitive sensor, an inductive sensor or an ultrasonic sensor
Implementation Method 3
the driver (9) controls the lighting elements (2) depending on the signal (V) and on the gap width (di), in particular if the determined gap width (di) is greater than an average spacing (a) of the lighting elements (2) in this row (Rm), the driver (9) increases the brightness of at least one lighting element (2) closer to the gap (Si) relative to the brightness of at least one lighting element (2) farther away from the gap (Si) in each row (Rm)
Data Source
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Figure 5~6
AI summary
The invention relates to a display device (1) with at least a first and a second panel (Pi, Pi+1), each having illuminating elements (2) arranged in rows (Rm) and columns (Cn) and which can be aligned with each other to form a gap (Si) parallel to the columns (Cn), at least one connecting element (4) for holding the panels (Pi) in their aligned position, a measuring device (6) which determines a width (di,m) of the gap (Si) for a row (Rm) of the first panel (Pi), and a driver (9, 12) which controls this illuminating element (2) depending on both the signal (V) and the gap width (di,m) determined for this row (Rm). The invention further relates to a panel (Pi) and a control method for this display device (1).