Dual-Stack Display Panels for Contrast Improvement

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Solution Overview

Problem

Existing liquid crystal display devices have relatively low display contrast, which fails to meet the higher quality demands of users, necessitating an improvement in contrast performance.

Innovation Solution

A dual-layer display assembly is introduced, comprising two display panels with the same resolution, where the driving circuit outputs the same data driving signal to both panels, and a timing control signal is shared to enhance contrast without the need for additional algorithm chips, simplifying the driving architecture and reducing production costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If a single-layer display panel is used, then the device complexity is low, but the display contrast is insufficient

Engineering Contradiction:
Improvedisplay contrastVSAvoiddisplay panel structure
Core Design Contradiction:
Illumination intensityVSDevice complexity

Solution Approach 1:

The patent transitions from a single-layer (2D) display panel to a dual-layer stacked (3D) display panel structure. By stacking two display panels with the same resolution, the patent achieves higher display contrast through the combined optical effects of multiple layers while maintaining compatibility with existing single-layer driving circuits, thus resolving the contradiction between improved contrast and increased structural complexity.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Illumination intensity

If different resolution panels are used in dual-layer configuration, then display quality is improved, but additional algorithm chips are required increasing cost

Engineering Contradiction:
Improvedisplay contrastVSAvoidproduction cost
Core Design Contradiction:
Illumination intensityVSEase of manufacture

Solution Approach 1:

The patent employs two display panels with identical resolution parameters in the stacked configuration. This homogeneity in panel specifications allows the existing single-layer driving circuits to directly drive the dual-layer structure without requiring additional algorithm chips or complex signal processing, thereby reducing production costs while still achieving improved display contrast through the dual-layer optical combination.

Inventive Principle:
Principle #33Homogeneity

Data Source

PatentUS11488559B2Display assembly including a first display panel and a second display panel stacked over the first display panel for improving a contrast ratio, and display device
Publication Date: 2022.11.01 BEIHAI HKC OPTOELECTRONICS TECH CO LTD
  • US11488559B2 patent drawing
  • US11488559B2 patent drawing
  • US11488559B2 patent drawing

AI summary

The present application discloses a display assembly and a display device. The display assembly includes a first display panel, a second display panel and a driving circuit; the second display panel is arranged in a stack with the first display panel; the first display panel and the second display panel have the same resolution, and the driving circuit outputs the same data driving signal to the first display panel and the second display panel; light emitting surfaces of the first display panel and the second display panel face the same direction.