Display Optical Module With Light Homogenization for Low Sparkle
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Solution Overview
Problem
Display apparatuses face challenges in balancing low sparkle and high definition due to the use of anti-glare layers that scatter light emitted by pixels, causing crosstalk and reducing imaging clarity.
Innovation Solution
Incorporating a light homogenization layer before the anti-glare layer to homogeneously mix light emitted by the display panel, reducing the need for high haze in the anti-glare layer to suppress glare and sparkle, while maintaining high definition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the haze of the anti-glare layer is increased to suppress sparkle, then the sparkle is reduced, but the imaging definition of the display apparatus decreases
Solution Approach 1:
The optical system is segmented into two distinct functional layers: a light homogenization layer positioned between the display panel and anti-glare layer. This segmentation allows the light homogenization layer to perform light mixing before light reaches the anti-glare layer, enabling the anti-glare layer to use lower haze (5%-20%) while still achieving sparkle suppression, thereby preserving imaging definition
Solution Approach 2:
The light homogenization layer performs preliminary light mixing action before light reaches the anti-glare layer. By pre-homogenizing the light from different pixels, the subsequent anti-glare layer with lower haze can scatter light without causing severe crosstalk, thus suppressing sparkle while maintaining imaging definition
2Object-affected harmful factors
If the surface roughness of the flat panel is increased to form an anti-glare layer, then glare is suppressed, but crosstalk occurs causing sparkle
Solution Approach 1:
The light homogenization layer acts as an intermediary between the display panel and the anti-glare layer. It mixes the light from different pixels before light reaches the anti-glare layer, so that when the anti-glare layer scatters light, the crosstalk is reduced. This intermediary layer enables the anti-glare layer to suppress glare effectively while minimizing sparkle generation
Solution Approach 2:
The invention changes the optical parameters by introducing a light homogenization layer with specific optical properties (transmittance, scattering characteristics) between the display panel and anti-glare layer. This parameter change allows the system to achieve both glare suppression and sparkle reduction by controlling how light is mixed and scattered across the optical path
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 combined use of a light homogenization and anti-glare layer effectively suppresses glare and sparkle without compromising imaging definition by ensuring homogeneous light mixing and reduced scattering directivity.
Implementation Method 1
The light homogenization layer can homogeneously mix light emitted by the display panel. An emergent angle of the light emitted by the display panel after passing through the light homogenization layer is increased.
Implementation Method 2
surface roughness of the flat panel is usually increased to form an anti-glare layer, so that light irradiated to the flat panel is scattered. Therefore, the light irradiated to the flat panel is not prone to generating specular reflection.
Data Source
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AI summary
Embodiments of this application provide an optical module, a display apparatus, a display device, and an electronic device, to resolve a problem that the display apparatus provided with an anti-glare cover cannot meet a low sparkle and high definition. The optical module is used in the display apparatus, the display apparatus includes a display panel, and the optical module includes a light homogenization layer and an anti-glare layer that are sequentially disposed in a light emitting direction of the display panel. Light intensity distribution of emergent light generated by the light homogenization layer when collimated light is vertically incident meets that light intensity attenuation is less than or equal to a first threshold in a specified emergent angle range. The light homogenization layer is configured to homogeneously mix light emitted by the display panel. A sparkle cannot be generated when light mixed by the light homogenization layer is incident on the anti-glare layer. In this way, there is no need to increase haze of the anti-glare layer to suppress the sparkle, and display imaging definition can be ensured.