LCD Backlight Lens Layout With Light Absorption Patterns
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Solution Overview
Problem
Existing display devices, particularly liquid crystal display (LCD) devices, suffer from the generation of light and dark areas due to the arrangement of light sources, leading to visible boundaries between separate display units and compromising image quality and reliability.
Innovation Solution
The implementation of a display device with a distribution board featuring a reflective layer, electrode pads, a light source with a lens, and strategically positioned first and second light absorption patterns. These patterns, which can include pad separators and insulating layers, are designed to absorb excess light and prevent the formation of light and dark areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light sources are arranged in a flat lighting device, then illumination is provided to the liquid crystal panel, but light and dark areas are generated between light sources
Solution Approach 1:
The patent introduces light absorption patterns with specific local properties (light-absorbing material arranged in patterns) at specific locations between light sources. These patterns have different optical properties from the surrounding areas, selectively absorbing light in the regions between light sources to prevent dark area formation while maintaining overall illumination uniformity.
Solution Approach 2:
The light absorption patterns act as intermediary elements between the light sources and the display panel. These patterns mediate the light distribution by absorbing excess light in specific regions, preventing direct light interference between adjacent light sources and eliminating the light/dark area phenomenon.
2Area of stationary object
If multiple display devices are combined to form a large display device, then display area is increased, but boundaries between separate display devices become visible
Solution Approach 1:
The light absorption patterns are strategically positioned at boundaries between display devices with specific optical properties designed to match or blend with adjacent display regions. This local optimization ensures that boundary areas have similar light absorption characteristics to surrounding areas, making boundaries invisible while maintaining large display area.
3Illumination intensity
If light absorption patterns are added to prevent light and dark areas, then illumination uniformity is improved, but device complexity increases
Solution Approach 1:
The patent extracts the light absorption function from complex multi-component systems and implements it through simple, standalone light absorption patterns. These patterns are minimalistic structures that perform the specific function of light absorption without requiring additional complex mechanisms, thereby improving illumination uniformity while minimizing complexity increase.
Solution Approach 2:
The light absorption patterns utilize changes in optical parameters (light absorption coefficient, pattern geometry, arrangement density) to achieve the desired light distribution effect. By optimizing these parameters, the patent achieves effective light uniformity control with simple structural modifications rather than complex mechanical or electronic systems.
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 prevents the generation of light and dark areas, thereby enhancing the image quality and reliability of liquid crystal display devices by ensuring uniform illumination and minimizing visible boundaries between display units.
Implementation Method 1
A light emitting device such as a light emitting diode is used as a light source for the flat lighting device
Implementation Method 2
a distribution board including a reflective layer
Implementation Method 3
a first light absorption pattern located outside the light emitting device within a width defined between the pair of electrode pads within the lens
Data Source
AI summary
The present disclosure is applicable to display device-related technology, and for example, relates to a display device and a liquid crystal display device with improved image quality and reliability. The display device using a light emitting device includes a distribution board including a reflective layer, a pair of electrode pads partitioned in an area other than the reflective layer on the distribution board and constituting a plurality of unit pixels or subpixels, a light source including a light emitting device electrically connected to the pair of electrode pads and a lens covering the light emitting device, and a first light absorption pattern located outside the light emitting device within a width defined between the pair of electrode pads within the lens.