CN-117662584-B - Polarization composite sheet attaching control equipment and method

CN117662584BCN 117662584 BCN117662584 BCN 117662584BCN-117662584-B

Abstract

The invention relates to the technical field of imaging display, in particular to a polarization composite sheet attaching control device and a method, wherein the device comprises a supporting subsystem, an attaching system, a measuring subsystem and a control module; the support subsystem comprises a light source, a film carrying table and a two-degree-of-freedom adjusting mechanism, wherein the film carrying table is used for flattening and fixing a first film, the two-degree-of-freedom adjusting mechanism is used for adjusting the position of the film carrying table and driving the film carrying table to rotate, the attaching system comprises a film restraint module and an attaching roller, the film restraint module is used for flattening and fixing a second film, the measuring subsystem comprises a spectrometer, a polarized light detecting sheet and a rotating mechanism, the spectrometer is used for receiving light rays emitted by the light source, the polarized light detecting sheet is used for carrying out polarized filtering on the light rays of an incident spectrometer, the rotating mechanism is used for driving the polarized light detecting sheet to rotate, and the control module is used for detecting relative angles. The invention can accurately regulate and control the relative angle between the light transmission directions of different layers of films in the process of attaching and preparing the polarization composite sheet.

Inventors

CHENG DEWEN
HOU QICHAO
WANG QIWEI
LI YANG
HUANG YILUN

Assignees

北京耐德佳显示技术有限公司

Dates

Publication Date: 20260512
Application Date: 20220825

Claims (13)

1. The polarization composite sheet attaching control equipment is used for attaching a polarization composite sheet formed by a first diaphragm and a second diaphragm, wherein the first diaphragm comprises a linear polarizer, and the second diaphragm comprises a quarter wave plate, and is characterized by comprising a bearing subsystem, an attaching and attaching subsystem, a measuring subsystem and a control module, The support subsystem comprises a light source, a film carrying table and a two-degree-of-freedom adjusting mechanism, wherein the film carrying table is used for flattening and fixing a first film to be attached; The attaching system is positioned on one side of the film carrying platform for fixing the first film and comprises a film restraint module and an attaching roller; the attaching roller is arranged on one side of the second diaphragm and is used for attaching the first diaphragm and the second diaphragm after the measuring subsystem detects that the relative angle between the light transmission directions of the first diaphragm and the second diaphragm meets the preset target angle requirement; The measuring subsystem comprises a spectrometer, a polarized light detection sheet and a rotating mechanism, wherein the measuring subsystem is arranged on one side of the attaching and attaching system, which is far away from the supporting subsystem, the spectrometer is used for receiving light rays emitted by the light source, the polarized light detection sheet is used for carrying out polarized filtering on the light rays entering the spectrometer, and the rotating mechanism is used for driving the polarized light detection sheet to rotate so as to change the rotating angle of the polarized light detection sheet relative to the polarized composite sheet; The control module is used for detecting whether the relative angle between the light transmission directions of the first diaphragm and the second diaphragm accords with a preset target angle or not after determining the phase delay amount of the first diaphragm and the relative angle between the light transmission directions of the polarized light detection sheet and the polarized composite sheet according to the relation among the light intensity collected by the measurement subsystem, the phase delay amount of the first diaphragm, the relative angle between the polarized light detection sheet and the light transmission directions of the polarized composite sheet and the relative angle between the light transmission directions of the first diaphragm and the second diaphragm.
2. The polarization composite attachment control apparatus according to claim 1, wherein: The first film includes a combination of a linear polarizer and a polarizing beamsplitter.
3. The polarization composite attachment control apparatus according to claim 1, wherein: The control module is also used for calculating the transmittance of the polarization composite sheet according to the collected initial light intensity and the light transmitted through the polarization composite sheet, so as to check whether the quality of the first membrane and the quality of the second membrane meet the preset membrane quality requirement.
4. The polarization composite attachment control apparatus according to claim 1, wherein: The control module is also used for calculating the phase delay amount of the quarter wave plate according to the collected initial light intensity and the light transmitted through the polarization composite sheet, so as to check whether the quality of the second membrane meets the preset membrane quality requirement.
5. The polarization composite attachment control apparatus according to claim 1, wherein: The two-degree-of-freedom adjusting mechanism comprises a linear sliding table capable of moving linearly and a rotary turntable.
6. The polarization composite attachment control apparatus of claim 5, wherein: The support subsystem further comprises a base, the two-degree-of-freedom adjusting mechanism is arranged at the top end of the base, and the film carrying table is arranged at the top end of the two-degree-of-freedom adjusting mechanism.
7. The polarization composite attachment control apparatus of claim 6, wherein: the two-degree-of-freedom adjusting mechanism is arranged on the base through a sliding rail.
8. The polarization composite attachment control apparatus according to claim 1, wherein: the bearing subsystem also comprises a negative pressure generator; the negative pressure generator is connected with the air holes of the film carrying platform through an air pipe and is used for forming negative pressure between the first diaphragm and the film carrying platform.
9. The polarization composite attachment control apparatus according to claim 1, wherein: The membrane restraint module comprises two groups of chucks which are oppositely arranged, each group of chucks comprises a pair of parallel round bars with adjustable intervals, and the two groups of chucks are respectively used for clamping two sides of the second membrane.
10. The polarization composite attachment control apparatus according to claim 1, wherein: the rotating mechanism comprises a rotating table, the polarized light detecting sheet is arranged above the rotating table, and a through hole for light transmission is formed in the center of the rotating table.
11. The method for controlling the attachment of the polarization composite sheet is characterized by comprising the following steps of: measuring an initial light intensity of light rays emitted by the light source when the first diaphragm and the second diaphragm are not placed by the spectrometer; flattening and fixing a first membrane to be attached through a membrane loading table; flattening and fixing a second membrane to be attached through a membrane restraint module; The distance between the first diaphragm and the second diaphragm is adjusted through a two-degree-of-freedom adjusting mechanism; coarse adjusting the relative angle between the light transmission directions of the first diaphragm and the second diaphragm through a two-degree-of-freedom adjusting mechanism; The method comprises the steps of rotating a polarized light detection sheet, obtaining the relation among initial light intensity, transmitted light intensity, phase delay amount of a first diaphragm, rotation angle of the polarized light detection sheet and relative angle between light transmission directions of the first diaphragm and a second diaphragm by a control module through a measurement subsystem, calculating a target rotation angle of the polarized light detection sheet according to a preset target angle between the light transmission directions of the first diaphragm and the second diaphragm, and adjusting the polarized light detection sheet to the target rotation angle; Rotating a film carrying table to finely adjust the relative angle between the light transmission directions of the first film and the second film, collecting the light transmission intensity through a measurement subsystem, and detecting whether the actual relative angle between the light transmission directions of the first film and the second film meets the preset target angle or not until the relative angle between the light transmission directions of the first film and the second film meets the preset target angle requirement; And attaching the second membrane and the first membrane through an attaching roller to obtain the polarization composite sheet.
12. The method for controlling attachment of a polarizing composite according to claim 11, further comprising, before fine-tuning the relative angle between the light transmission directions of the first film and the second film, the steps of: And calculating the transmittance of the polarization composite sheet according to the acquired initial light intensity and the acquired light intensity of the light transmitted through the polarization composite sheet so as to judge whether the membrane quality of the first membrane and the membrane quality of the second membrane meet the preset membrane quality requirement, and if so, continuing to execute.
13. The method for controlling attachment of a polarizing composite according to claim 11, further comprising, before fine-tuning the relative angle between the light transmission directions of the first film and the second film, the steps of: and calculating the phase delay amount of the quarter wave plate according to the acquired initial light intensity and the acquired light intensity of the light transmitted through the polarization composite sheet, so as to check whether the diaphragm quality of the second diaphragm meets the preset diaphragm quality requirement.

Description

Polarization composite sheet attaching control equipment and method Technical Field The invention relates to the technical field of imaging display, in particular to a device and a method for controlling attachment of a polarization composite sheet. Background In the imaging display optical path, polarizing composite plates, such as a typical virtual near-to-eye display system Pancake optical path (ultra-short focal optical folded optical path) and an augmented reality near-to-eye display system birdbath optical path, are often required, if the light-emitting surface of the display is out of round polarization, two polarizing composite plates are required, as shown in fig. 1 (a) and fig. 1 (b), respectively, and if the light-emitting surface of the display is out of round polarization, only the polarizing composite plates shown in fig. 1 (a) are required. The polarization composite plate shown in fig. 1 (a) includes a combination of films, which includes a linear polarizer (Polarizer, POL), a polarization splitter (Polarizing Beam Spliter, PBS), a Quarter-wave plate (Quarter-WAVE PLATE, QWP) and an Anti-reflection film (AR) in this order from the left side to the right side, and the polarization composite plate shown in fig. 1 (b) includes a combination of films, which includes an Anti-reflection film (AR), a Quarter-wave plate (Quarter-WAVE PLATE, QWP) and a linear polarizer (Polarizer, POL) in this order from the left side to the right side. The Anti-reflection film (AR) is used to reduce the reflection on the surface of the film, and does not affect the polarization state of the transmitted light. The combination of films included in these polarizing composite sheets often cannot be simply bonded together, and special requirements are placed on the relative angles between the directions of transmission of the POL, PBS and QWP films therein. For the polarizing composite shown in fig. 1 (a), the light transmission direction of POL and the light transmission direction of PBS should coincide as much as possible, and the angle between the light transmission direction of PBS and the light transmission direction of QWP should be as close as possible to 45 °. For the polarizing composite shown in fig. 1 (b), the angle between the transmission direction of QWP and the transmission direction of POL should be as close to 45 ° as possible. In order to obtain the polarizing composite sheet meeting the requirements, the relative angles between the light transmission directions of the films of different layers need to be regulated and controlled in the process of attaching and preparing the polarizing composite sheet. At present, the prior art only considers the accuracy of film alignment and the flatness problem of film adhesion when attaching the film, and to the relative angle between the light transmission directions of two layers of films, only relies on naked eye measurement to confirm, for example, the relative angle between the light transmission directions of two layers of films is observed through marking the film light transmission directions, and the mode is easy to generate deviation, is difficult to ensure that the relative angle between the light transmission directions of the films accurately reaches the preset requirement, and has low yield. At present, no attaching control device aiming at the production requirement of the polarization composite sheet exists in the prior art. Disclosure of Invention The invention aims at least one part of the defects, and provides attaching control equipment and method capable of accurately regulating and controlling the relative angles between the light transmission directions of different layers of films in the process of attaching and preparing the polarization composite sheet, so that the yield of the polarization composite sheet is improved. In order to achieve the above purpose, the technical scheme of the invention is realized as follows: A polarization composite plate attaching control device is used for attaching a polarization composite plate formed by a first diaphragm and a second diaphragm, wherein the first diaphragm comprises a linear Polarizer (POL) or comprises a combination of the linear Polarizer (POL) and a polarization splitter (PBS), the second diaphragm comprises a Quarter Wave Plate (QWP), the polarization composite plate attaching control device comprises a bearing subsystem, an attaching subsystem, a measuring subsystem and a control module, The support subsystem comprises a light source, a film carrying table and a two-degree-of-freedom adjusting mechanism, wherein the film carrying table is used for flattening and fixing a first film to be attached; The attaching system is positioned on one side of the film carrying platform for fixing the first film and comprises a film restraint module and an attaching roller; the attaching roller is arranged on one side of the second diaphragm and is used for attaching the first diaphragm and the second