Display device

By integrating a light-scattering layer with controlled pitch and distance relationships, the display device mitigates moiré interference, improving visibility and contrast in reflective liquid crystal displays.

JP2026015325APending Publication Date: 2026-01-29TOMOEGAWA CORP +1
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Patent Information

Application Number
JP2025169042
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-03-29
Filing Date
2025-10-07
Publication Date
2026-01-29

AI Technical Summary

Technical Problem

Existing reflective liquid crystal display devices experience interference fringes due to the mismatched pitches between the cathode patterns in the direct illumination unit and the reflective pixel electrodes, leading to moiré patterns that reduce display contrast and visibility.

Method used

Incorporating a light-scattering layer within or between the reflective display device and the direct illumination unit, with specific relational expressions governing the pitch and distance relationships between the cathode and pixel electrode patterns, and using anisotropic or isotropic light-scattering layers to manage light scattering based on incidence angles.

Benefits of technology

Effectively suppresses moiré patterns, enhancing display visibility and contrast by minimizing interference between light paths from the illumination and reflective components.

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Abstract

To provide a display device capable of more effectively suppressing occurrence of moire and having excellent visibility.SOLUTION: The display device 1 is provided with a reflection type display device 100 and a direct projection type illumination part 200 arranged on a viewing side. The direct type illumination part 200 is an organic electroluminescence element including a reflective pixel electrode 140 having periodicity on the surface of the visible side. P1 ≤ 2 * P2 * tan (θ 1 / 2), where P2 is a pitch between patterns of the cathode 230, D1 is a pitch between patterns of the reflective pixel electrodes 140, D1 is a shortest distance from a front face of the light scattering layer 300 on a viewing side to front faces of the reflective pixel electrodes 140 on the viewing side, D2 is a shortest distance from a front face of the light scattering layer 300 on the reflective pixel electrodes 140 side to front faces of the cathodes 230 on the reflective pixel electrodes 140 side, and θ 1 is a scattering angle of the light scattering layer 300. 300, P1 ≤ 2 * D2 * tan (θ 1 / 2) is satisfied.SELECTED DRAWING: Figure 5
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Citation Information

Patent Citations

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    JP2004258358A

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    JP2006154402A

  • Display device

    JP2006323303A