Autostereoscopic Display Cut-Outs for Brightness Uniformity
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Solution Overview
Problem
Conventional autostereoscopic displays experience spatial resolution loss and brightness variations in the row direction due to the arrangement of individually addressable display elements and the use of lenticular sheets, which are not adequately addressed by existing solutions such as slanted orientation of lenticular lenses.
Innovation Solution
The design of autostereoscopic displays with individually addressable display elements that have a non-rectangular shape with cut-outs, positioned relative to the slanted angle of the lenticular light directing elements, to ensure equal overlap of light collection lines, thereby reducing brightness variations and maintaining uniformity across the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If slanted orientation of lenticular lens is used, then spatial resolution loss is alleviated and brightness variations are reduced, but brightness variations are not eliminated
Solution Approach 1:
The patent applies asymmetry by introducing a slanted orientation between the lenticular lens axis and the column direction of display elements. This asymmetric arrangement at a specific angle distributes the loss of resolution between row and column directions, reducing the starkness of resolution loss in the row direction while also mitigating brightness variations across the display.
Solution Approach 2:
The patent employs parameter changes by optimizing the slant angle between the lenticular lens and display element columns. By adjusting this angular parameter, the system achieves a balance that simultaneously addresses both spatial resolution preservation and brightness uniformity, transforming the optical parameters to resolve the contradiction.
2Ease of manufacture
If conventional rectangular display elements are used, then manufacturing is simple, but brightness variations occur in the row direction
Solution Approach 1:
The patent modifies the conventional rectangular display element arrangement by introducing a slanted orientation of the lenticular lens relative to the column direction. This asymmetric configuration changes how light collection lines overlap with display elements, creating more uniform brightness distribution across rows while maintaining manufacturing feasibility through standard display element fabrication.
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
This approach results in improved brightness uniformity and reduced spatial resolution loss, enhancing the overall 3D performance of autostereoscopic displays by ensuring consistent light collection across different viewing directions.
Implementation Method 1
A lenticular sheet, for example in the form of a moulded or machined sheet of polymer material, overlies the output side of the display panel with its lenticular elements, comprising (semi) cylindrical lens elements... The lenticular sheet directs these two slices... to the left and right eyes respectively
Implementation Method 2
The colour filter comprises a plurality of colour filter elements... each colour filter element being of a shape corresponding to the shape of the respective display element... providing in operation red, green and blue colours
Data Source
AI summary
An autostereoscopic display apparatus (8), comprising: a plurality of individually addressable display elements (2) arranged in an array of rows and columns; and light directing means (15) comprising a plurality of light directing elements (16) at a slant angle (α) to the column direction (6); wherein the shape of the individually addressable display elements (2) substantially comprises the shape remaining from a rectangular footprint when one or more cut-outs (2c) is removed; the one or more cut-outs (2c) being positioned relative to the slanted angle (α) of the light directing elements (16) such as to provide a reduction in brightness variation along the row direction (4) compared to what individually addressable display elements shaped according to the rectangular footprint would provide.