Staggered Circuit Boards in Display Module Reduce Friction
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Solution Overview
Problem
Existing liquid crystal display devices suffer from low contrast due to light leakage in the dark state, which is exacerbated by the need for a backlight module and limitations in contrast and brightness uniformity.
Innovation Solution
A display module comprising a display panel, a light control panel, and circuit boards, where the display panel and light control panel are stacked with the display panel on the light-emitting side, and the circuit boards are positioned to avoid overlap in a direction perpendicular to the surface, reducing friction and improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display panel and light control panel are stacked with circuit boards, then the display function is achieved, but friction between overlapping circuit boards causes poor display quality
Solution Approach 1:
The patent resolves the friction problem by transitioning from a two-dimensional overlapping arrangement to a three-dimensional staggered arrangement. The first and second circuit boards are positioned at different locations in the plane perpendicular to the stacking direction, so their orthographic projections do not overlap. This dimensional separation eliminates direct contact between the circuit boards while maintaining electrical connectivity through the flexible circuit boards, thereby eliminating friction-induced display defects.
2Illumination intensity
If a backlight module is used to provide light source, then the display operation is enabled, but light leakage occurs in dark state reducing contrast
Solution Approach 1:
The patent extracts and addresses the light leakage problem by introducing a light control panel with independent circuit board control. The second circuit board, positioned separately from the first circuit board, controls the light control panel to precisely manage light output and prevent light leakage in dark states, thereby improving contrast while maintaining brightness uniformity through independent control.
Data Source
AI summary
A display module is provided. The display module includes: a display panel, a light control panel, at least one first circuit board for the display panel, and at least one second circuit board for the light control panel. The display panel and the light control panel) are stacked, the display panel is on a light-emitting side of the light control panel, a light-emitting surface of the display panel is on a first surface, and at least part of an orthographic projection of any one of the at least one first circuit board on the first surface does not overlap with an orthographic projection of the at least one second circuit board on the first surface in a direction perpendicular to the first surface.