Backlight Light Supplementation for Bent LCD Edges
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Solution Overview
Problem
The region where the edge of a liquid crystal display panel is bent downward is too dark, preventing normal display and failing to achieve a true full-screen effect, which is a limitation in current LCD technology compared to OLED displays.
Innovation Solution
A backlight module with a light supplementation structure, including lamp beads and a light guide plate, is arranged between the light guide plate and the bent portion of the liquid crystal display panel to supplement light, ensuring uniform brightness and achieving a full-screen visual effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the edge of the liquid crystal display panel is bent downward to form a waterfall screen, then the full-screen visual effect is improved, but the brightness at the bent region becomes too dark for normal display
Solution Approach 1:
The patent applies local quality by introducing a light supplementation structure specifically at the bent portion of the display panel. This structure includes a light guide plate with light emitting units that are localized only at the regions where the panel is bent downward, providing targeted illumination enhancement exactly where needed without affecting other areas of the display.
Solution Approach 2:
The patent uses an intermediary approach by introducing a light guide plate as a mediating structure between the backlight source and the bent portion of the display panel. The light guide plate with its light emitting units acts as an intermediary element that redirects and supplements light specifically to the dark bent regions, enabling the waterfall screen effect while maintaining display visibility.
2Shape
If OLED technology is used to achieve full-screen display, then the full-screen effect is improved, but the cost increases and yield decreases
Solution Approach 1:
The patent applies the copying principle by replicating the light guiding function of expensive OLED structures using a different, more cost-effective approach. Instead of using OLED materials and processes, the patent copies the essential light emission and guidance functionality using conventional LCD technology combined with a specially designed light guide plate structure, achieving similar full-screen effects at lower cost and with better manufacturability.
Solution Approach 2:
The patent employs cheap short-living objects by replacing expensive OLED components with inexpensive conventional LCD components and a simple light guide plate structure. The light guide plate with light emitting units serves as a cost-effective alternative to expensive OLED displays, enabling full-screen waterfall effects using readily available, low-cost manufacturing processes.
3Area of moving object
If the edge of the liquid crystal display panel is bent downward, then the screen-to-body ratio is improved, but the display quality at the bent region deteriorates due to darkness
Solution Approach 1:
The patent applies local quality by enhancing only the specific bent regions of the display panel with light emitting units integrated into the light guide plate. This localized light supplementation improves display quality precisely at the bent portions where darkness occurs, while maintaining the overall high screen-to-body ratio achieved through the waterfall screen design.
Solution Approach 2:
The patent uses an intermediary light guide plate structure that mediates between the backlight source and the bent display regions. This intermediary structure with integrated light emitting units ensures that light is properly directed to the bent portions, maintaining display quality and readability even at the extreme edges of the waterfall screen configuration.
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
The solution effectively addresses the issue of darkness at the bent edges, enabling the liquid crystal display panel to display images normally and achieve a full-screen effect, while reducing costs and improving yield compared to OLED technologies.
Implementation Method 1
The light guide plate provides backlight for the flat portion
Implementation Method 2
The light supplementation structure includes a lamp bead. The lamp bead includes a reflector cup holder, a first chip and a second chip
Implementation Method 3
The optical film is disposed between the light guide plate and the liquid crystal display panel, and covers the light guide plate and the light supplementation structure
Data Source
AI summary
A display device and a backlight module are disclosed. The display device includes a backlight module and a liquid crystal display panel that are correspondingly arranged. The liquid crystal display panel includes a flat portion and at least one bent portion. One end of the bent portion is connected to an edge of the flat portion, and the other end is bent downward. The backlight module includes a light guide plate, an optical film, and a light supplementation structure. The optical film is arranged between the light guide plate and the liquid crystal display panel, and covers the light guide plate and the light supplementation structure. The light guide plate is disposed corresponding to the flat portion. The light supplementation structure is arranged between the light guide plate and the bent portion, and supplements light for the bent portion.