CN-121978793-A - Method for improving uniformity of light source based on optical film material

Abstract

The application discloses a method for improving uniformity of a light source based on an optical film material, which comprises the steps of arranging a layer of optical regulation and control layer capable of being processed digitally in a light path between the light source and a light emitting surface, measuring brightness distribution of the light emitting surface to obtain brightness uneven data, generating regulation and control film processing patterns for compensating brightness difference according to the brightness uneven data, micro-processing the optical regulation and control layer according to the processing patterns, adjusting light transmittance or reflectivity of a local area of the optical regulation and control layer, placing the processed optical regulation and control layer in the light path to compensate the uniformity of the light emitting, compensating micro-difference of hardware production through digital calibration software, greatly improving production efficiency and flexibility, solving product performance fluctuation caused by component and assembly difference, and enabling product yield and stability not to depend on consistency of components and assembly.

Inventors

• TAN QIAOLING
• Zhang Zhuangwen

Assignees

• 唐明盛试精密仪器(苏州)有限公司

Dates

Publication Date

20260505

Application Date

20260311

Claims (7)

1. 1. The method for improving the uniformity of the light source based on the optical film material is characterized by comprising the following steps of: an optical regulation layer which can be digitally processed is arranged in a light path between a light source and a light emitting surface; Dividing the light-emitting surface into a plurality of acquisition units according to a set interval, and acquiring illuminance data at the center of each acquisition unit based on a photometer to acquire a plurality of illuminance data; calculating initial uniformity of the light surface according to the acquired illuminance data, and judging whether the initial uniformity reaches a target uniformity; if the brightness difference is not achieved, generating a regulating film processing pattern for compensating the brightness difference, micro-processing the optical regulating layer according to the processing pattern, and regulating the light transmittance or the reflectivity of a local area of the optical regulating layer; And placing the processed optical control layer into a light path to compensate the uniformity of the light emitting surface.
2. 2. The method for improving uniformity of a light source based on an optical film material according to claim 1, wherein the light source is a side-in light source, the optical control layer is a light reflecting film, a light guide plate is arranged above the optical control layer, a light absorbing layer is arranged below the light reflecting film, and light transmitting holes are processed at positions corresponding to bright areas of the light reflecting film based on processing parameters.
3. 3. The method of claim 2, wherein the processing parameters include diameter, density or arrangement of light-transmitting holes.
4. 4. The method for improving uniformity of a light source based on an optical film material according to claim 1, wherein the light source is a side-in light source, the optical control layer is a light-transmitting film or an optical filter, a light guide plate is arranged below the optical control layer, holes or microstructures are processed on the light-transmitting film or the optical filter, and local light transmittance is adjusted to perform brightness compensation.
5. 5. The method of claim 4, wherein the microstructuring comprises at least one of laser drilling, mechanical microneedle drilling, laser engraving, hot pressing, or chemical etching.
6. 6. The method for improving uniformity of a light source based on an optical film according to claim 1, wherein the light source is a direct type light source, and the optical control layer is a light-transmitting film or an optical filter.
7. 7. The method for improving uniformity of a light source based on an optical film according to claim 6, wherein a regulating layer bearing table is arranged at the bottom of the optical regulating layer, a hollow cavity is arranged at the bottom of the regulating layer bearing table, and a lamp panel is arranged at the bottom of the hollow cavity.

Description

Method for improving uniformity of light source based on optical film material Technical Field The invention relates to the technical field of light source uniformity optimization, in particular to a method for improving light source uniformity based on an optical film material. Background In the conventional light source manufacturing, in order to achieve uniformity of the light emitting surface, means such as a diffusion plate, a light guide plate, a mesh point design, a multilayer optical film, and the like are generally used. These methods are usually cured at the design and manufacturing stage, once assembled, the adjustment means are very limited and costly if localized hot spots or dark areas occur, often requiring replacement of the light guide plate or the entire optical module or other expensive optical components, being inefficient, costly, and difficult to achieve optimal uniformity. Therefore, a solution capable of performing high-precision, low-cost, quantifiable, repeatable iterative debugging on uniformity after product assembly is needed to cope with the effects of brightness dispersion, structural assembly tolerance and material batch difference of the light source. Disclosure of Invention The invention aims to provide a method for improving uniformity of a light source based on an optical film material so as to solve the problems in the background art. In order to achieve the aim of the invention, the first technical scheme adopted by the invention is that the method for improving the uniformity of the light source based on the optical film material comprises the following steps: an optical regulation layer which can be digitally processed is arranged in a light path between a light source and a light emitting surface; Dividing the light-emitting surface into a plurality of acquisition units according to a set interval, and acquiring illuminance data at the center of each acquisition unit based on a photometer to acquire a plurality of illuminance data; calculating initial uniformity of the light surface according to the acquired illuminance data, and judging whether the initial uniformity reaches a target uniformity; if the brightness difference is not achieved, generating a regulating film processing pattern for compensating the brightness difference, micro-processing the optical regulating layer according to the processing pattern, and regulating the light transmittance or the reflectivity of a local area of the optical regulating layer; And placing the processed optical control layer into a light path to compensate the uniformity of the light emitting surface. Further, the light source is a side-in light source, the optical regulation and control layer is a light reflecting film, a light guide plate is arranged above the optical regulation and control layer, a light absorbing layer is arranged below the light reflecting film, and light transmitting holes are processed at positions corresponding to a bright area of the light reflecting film based on processing parameters. Further, the processing parameters include the diameter, density or arrangement of the light-transmitting holes. Further, the light source is a side-in light source, the optical regulation layer is a light-transmitting film or a light filter, a light guide plate is arranged below the optical regulation layer, holes or microstructures are processed on the light-transmitting film or the light filter, and local light transmittance is regulated to perform brightness compensation. Further, the microstructure processing includes at least one of laser drilling, mechanical microneedle drilling, laser engraving, hot pressing, or chemical etching. Further, the light source is a direct type light source, and the optical regulation layer is a light-transmitting film or an optical filter. Further, the bottom of the optical regulation layer is provided with a regulation layer bearing table, the bottom of the regulation layer bearing table is provided with a hollow cavity, and the bottom of the hollow cavity is provided with a lamp panel. Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the core cost of uniformity optimization is converted from the early high-precision and high-consistency manufacturing cost and the design curing cost into the later low-cost digital calibration cost. Allowing the use of slightly wider tolerance, lower cost universal optical or structural components, compensating for individual differences by post calibration, greatly reducing overall system manufacturing costs. The digital calibration software is used for making up the tiny difference of hardware production, so that the production efficiency and flexibility are greatly improved, the hardware does not need to sacrifice the production speed for pursuing extremely consistent, the fluctuation of product performance caused by the difference of components and assembly is solved, and t