TWI729888B - Polarizer and electronic device comprising the same - Google Patents

Abstract

The invention discloses a polarizer comprising a first protective layer, a second protective layer, and a polarizing layer sandwiched therebetween. The polarizing layer comprises a first polarizing area and a second polarizing area with different polarization. The degree of polarization of the first polarizing area is greater than 99.9% and less than 100%, and the light transmittance is between 40% and 45%; the polarization degree of the second polarizing area is not less than 90% and not greater than 99.9%, and the light transmittance is between 45% to 48%. The disclosed polarizer can be used in an electronic device with an integrated camera module.

Description

Polarizing plate and electronic device containing the polarizing plate

The present invention relates to a polarizing plate, and more particularly to a polarizing plate suitable for electronic devices, and an electronic device containing the polarizing plate.

In recent years, various electronic devices such as personal computers, mobile communication equipment, and wearable devices have been widely used, and multiple input devices or/and output devices, such as displays, touch panels, sensors, and Camera modules, etc., are more focused on related technology development. At present, the structural design of electronic devices with displays integrated with camera modules has become the mainstream in the market. As shown in the schematic top view of FIG. 1, in a known electronic device with a display integrated with a camera module, in order to prevent the camera module from being visible from the outside of the electronic device, the camera module 14 is arranged on the frame of the display area 15 of the electronic device 18 in. However, as the display screen of the electronic device is further maximized, the camera module is also integrated into the display. Please refer to FIGS. 2A and 2B, which are respectively a cross-sectional view and a top/bottom view of a known electronic device 2a that includes an integrated camera module to a display element. As shown in FIG. 2A, the camera module 24 of the electronic device 2a is set in the display 200, and hollow areas are formed in the polarizing plate 22 and the display element 23 by mechanical special-shaped cutting, drilling, etc., to correspond to and accommodate the camera module. 24, and make the camera lens 21 not be shielded to achieve the photography function. This type of electronic device 2a has a camera module functional area 26 in the display area 25, which occupies a part of the display area 25 and reduces the display ratio of the display area 25 in the display 200, thereby improving the assembly form of the camera module Increasing the display ratio of displays has become one of the key points of active technological improvement of electronic equipment manufacturers.

With the development of OLED display technology, the feasibility of assembling camera modules under the display and increasing the display ratio of the display has been proposed in related technologies. 3A and 3B are respectively a cross-sectional view and a top schematic view of a known electronic device with an OLED display integrated with a camera module. As shown in FIGS. 3A and 3B, the electronic device 3a includes an OLED display 300 and a camera module 34. The camera module 34 is disposed under the OLED display 300 including a polarizing plate 32 and an OLED display element 33, so that the electronic device 3a can achieve The display area 35 is for the purpose of full-screen display. However, in order to prevent the polarization characteristics of the polarizing plate 32 on the OLED display element 33 from affecting the light sensitivity of the lens 31 of the camera module 34, thereby degrading the photographic quality, the lens 31 of the camera module 35 must be matched with a polarization failure zone on the polarizing plate 32 32b. However, when the photographing function of the corresponding camera module 35 is not activated in the polarization failure area 32b, the non-polarization of the area makes the display quality of the area degraded when the display function is activated, and the high light transmittance of the polarization failure area 32b The camera lens 31 below the area is also visible on the electronic device 3a.

Therefore, there is a need for a solution that can hide the camera lens on the electronic device on the electronic device that integrates the camera module with the display.

An object of the present invention is to provide a polarizing plate suitable for electronic devices with integrated camera modules and displays, which enables the electronic devices to be displayed on a full screen, hide the camera lens on the electronic devices and have both excellent photographic quality and Display quality. The present invention discloses a polarizing plate suitable for electronic devices. The polarizing plate includes a first protective film, a polarizing film, and a second protective film. Wherein, the polarizing film is disposed between the first protective film and the second protective film, the polarizing film includes a first polarizing zone and a second polarizing zone, wherein the degree of polarization of the first polarizing zone is greater than 99.9% and less than 100% , And the light transmittance is between 40% and 45%; the polarization degree of the second polarization zone is not less than 90% and not more than 99.9%, preferably not less than 91% and not more than 98%, and the light transmittance is between 45% to 48%.

Another object of the present invention is to provide an electronic device including a display element, the display element including a display area, a polarizing plate placed on the display element, and a camera module integrated into the display element, wherein the display The area includes a functional area of a camera module. The polarizing plate includes a first polarization area and a second polarization area. The first polarization area and the second polarization area have different degrees of polarization and light transmittance, and the first polarization area and the second polarization area have different degrees of polarization and light transmittance. The second polarization zone is located on the functional zone of the camera module.

According to a preferred embodiment of the electronic device of the present invention, the second polarization zone can substantially completely cover the functional area of the camera module.

According to a preferred embodiment of the electronic device of the present invention, as described above, the polarization degree of the second functional area of the polarizing plate is not less than 90% and not more than 99.9%, preferably not less than 91% and not more than 98% , And the light transmittance is between 45% and 48%.

According to a preferred embodiment of the electronic device of the present invention, the polarization degree of the first polarization zone of the polarizing plate is greater than 99.9% and less than 100%, and the light transmittance is between 40% and 45%, which covers the display area The area outside the functional area of the camera module.

The above content of the invention is intended to provide a simplified summary of the content of the disclosure, so that readers have a basic understanding of the content of the disclosure. This summary is not a complete summary of the present disclosure, and its intention is not to point out important/key elements of the embodiments of the present invention or to define the scope of the present invention. After referring to the following embodiments, those with ordinary knowledge in the technical field to which the present invention belongs can easily understand the basic spirit of the present invention, as well as the technical means and implementation modes adopted by the present invention.

In order to make the description of the disclosure of the present invention more detailed and complete, the following provides an illustrative description for the implementation aspects and specific embodiments of the present invention; this is not the only way to implement or use the specific embodiments of the present invention. The embodiments disclosed below can be combined or substituted with each other under beneficial circumstances, and other embodiments can also be added to an embodiment without further description or description.

The advantages, features, and technical methods of the present invention will be described in more detail with reference to exemplary embodiments to make it easier to understand, and the present invention may be implemented in different forms, so it should not be understood to be limited to the embodiments set forth herein. On the contrary, for those with ordinary knowledge in the technical field, the provided embodiments will make this disclosure more thorough, comprehensive and complete to convey the scope of the present invention, and the present invention will only be covered by the scope of the appended patent application. definition.

Unless otherwise defined, all terms (including technical and scientific terms) and proper nouns applicable to the following text are essentially the same as those generally understood by those skilled in the art to which the present invention belongs, and for example, in general The terms defined in the dictionary used should be understood as having the meaning consistent with the content of the related field, and unless it is clearly defined in the following text, it will not be understood in an overly idealized or overly formal meaning.

Furthermore, the "transmittance" in this text refers to the ratio of the light intensity of incident light of visible wavelengths passing through the polarizing plate to the light intensity before entering the polarizing plate. "Polarization" refers to the ratio of the intensity difference between the vibration direction of the transmitted light parallel to the absorption axis and perpendicular to the absorption axis and the transmitted light intensity after the incident light of visible wavelength passes through the polarizer.

The following diagrams are used to illustrate the polarizing plate of the present invention suitable for electronic devices. First, please refer to FIG. 4. As shown in FIG. 4, the polarizing plate 42 suitable for electronic devices of the present invention sequentially includes a first protective film 421, a polarizing film 422, and a second protective film 423, and the polarizing film 422 includes first polarizers with different degrees of polarization. Zone 42a and the second polarization zone 42b.

In an embodiment of the present invention, the suitable polarizing film 422 may be a polarizer known in the related art, such as an iodine-based polarizer, a dye-based polarizer, a polyvinylidene-based polarizer, etc., or a combination thereof. Special restrictions.

In an embodiment of the present invention, the first protective film 421 and the second protective film 423 are used to protect and support the polarizing film 422. Therefore, a suitable material can be a film with good mechanical strength and light transmittance. Can be but not limited to polymethyl methacrylate (PMMA), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonate (PC), triacetyl cellulose (TAC), polyimide (PI), polyethylene (PE), polypropylene (PP), polyvinyl alcohol (PVA), polyvinyl chloride (PVC) or cyclic olefin copolymer (COC) and other resin film materials . In addition, when the polarizing plate 42 is applied to an electronic device, in order to provide the surface characteristics required by the electronic device, the surface of the polarizing plate 42 may further include a functional coating film, wherein the functional coating film can be selected from anti-scratch coating film, reflective film, One or a combination of anti-glare film, anti-reflection-anti-glare film, oleophobic film, etc.

In another embodiment of the present invention, the second protective film 423 may also be a functional optical film, for example, it may be a phase difference plate.

Polarizers suitable for electronic devices are iodine-based polarizers, dye-based polarizers, and polyalkenylene-based polarizers with a degree of polarization greater than 99.9% and less than 100%, and light transmittance between 40% and 50%. The method of forming the polarizing plate of the present invention can be performed by subjecting the polarizing plate suitable for electronic devices to partial depolarization treatment, for example, exposing the polarizing film or decoloring treatment with chemical reagents. 5 is a schematic diagram illustrating a method of forming the first polarizing zone 42a and the second polarizing zone 42b of the polarizing film 422 of the present invention. As shown in the schematic diagram of Fig. 5, the polarizing film 422 of the polarizing plate suitable for electronic devices is shielded by an opaque mask 59 with an appropriate size of the aperture area 591, and then illuminated with a light source 58 that controls the irradiation energy to be on the polarizing film 422 A second polarization zone 42b for depolarization is formed. In the illuminating step, the light source can be a light source that can provide appropriate inferred energy. Suitable light sources can be, but are not limited to, low-pressure mercury lamps, medium-pressure mercury lamps, high-pressure mercury lamps, ultra-high-pressure mercury lamps, chemical lamps, black light lamps, Microwave excites mercury lamps and metal halide lamps, and the suitable irradiation wavelength can be in the wavelength range of 200 nm to 1000 nm, and the irradiation intensity is preferably 0.5 kW/cm2 to 5.9 kW/cm2. In order to make the polarizing film 422 effectively generate the second polarization zone 42b, and the exposed part does not generate high heat due to long-term exposure and local material deterioration, the cumulative light quantity of the product of the above-mentioned irradiation intensity and irradiation time is set at 20 to 140 J/cm2. ideal. In the embodiment of the present invention, the planar shape of the second polarization zone 42b is not limited, and it may be a regular shape or an irregular shape, as long as it can conform to the corresponding functional zone.

Again, please refer to Figures 6A and 6B. 6A is a schematic cross-sectional view illustrating an electronic device 600a with an integrated camera module 64a according to an embodiment of the present invention, which includes a display element 63a, a polarizing plate 42, and a camera module 64a integrated with the display element 63a and equipped with a lens 61a 6B is a schematic diagram illustrating an electronic device 600b with an integrated camera module 64b according to another embodiment of the present invention, which includes a display element 63b, a polarizing plate 42, and a camera module 64b integrated with the display element 63b and equipped with a lens 61b . The display element 63a or 63b includes a display area 65, and the display area 65 includes a range area corresponding to the lens 61a, 61b of the camera module 64a, 64b and can be effectively photosensitive to further complete the functional area of the camera module for shooting action 66. Wherein, the polarizing plate 42 covers the display area 65, and the polarizing plate 42 includes a first polarizing area 42a and a second polarizing area 42b with different degrees of polarization and light transmittance. The second polarizing area 42b is located in the functional area of the camera module. 66, and the first polarization zone covers the area outside the functional area 66 of the camera module in the display area 65. In a preferred implementation according to the present invention, the second polarizing area 42b can substantially completely cover the functional area 66 of the camera module in the display area 65. In a preferred embodiment of the present invention, the degree of polarization of the second polarizing zone 42b is not less than 90% and not more than 99.9%, preferably not less than 91% and not more than 98%, and the light transmittance is between 45% To 48%; the polarization of the first polarization zone 42a is greater than 99.9% and less than 100%, and the light transmittance is between 40% and 45%.

The specific light transmittance of the second polarizing zone 42b of the polarizer 42 corresponds to the functional zone 66 of the camera module so that the camera module 12 is effectively sensitive to further complete the shooting action, and the high polarization of the first polarizing zone 42a corresponds to the display area 65 The area outside the functional area 66 of the camera module in the camera module provides excellent display quality in this area. In the mounting configuration of the electronic device 600a, the camera module 64a with the lens 61a is integrated under the display element 63a, so that the second polarizing area 24b is not activated when the photography function of the corresponding camera module 64a is not activated. The specific degree of polarization enables the area to have a good display quality when the display function is activated, and also makes the camera lens 61a under the area hidden on the electronic device 600a.

In an embodiment of the present invention, the display element 11 can be a display element known in the related art, such as an LED display element, an LCD liquid crystal display element, an OLED display element, etc., or a combination thereof, without particular limitation.

In summary, the polarizing plate suitable for electronic devices with display elements integrated with camera modules disclosed in the present invention includes a first polarizing zone and a second polarizing zone with different degrees of polarization and light transmittance, so that the When the polarizing plate is applied to an electronic device with a display element integrated with a camera module, it can achieve the purpose of hiding the lens of the camera module under the full-screen display of the electronic device and having both excellent photographic quality and display quality.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone familiar with the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be subject to the definition of the attached patent application scope.

14, 24, 34, 64a, 64b: camera module 15, 25, 35, 65: display area 18: border 21, 31, 61a, 61b: lens 22, 32, 42: Polarizing plate 23, 33, 63a, 63b: display components 26, 66: The functional area of the camera module 200: display 300: OLED display 2a, 3a: electronic device 32b: Polarization failure zone 421: The first protective film 422: Polarizing film 423: second protective film 42a: first polarization zone 42b: second polarization zone 58: light source 59: Opaque mask 591: hole 600a, 600b: electronic device

FIG. 1 is a schematic cross-sectional view of a known electronic device with a display integrated with a camera module 11.

2A and 2B are respectively a cross-sectional view and a top/bottom view of a known electronic device with integrated camera module and display.

3A and 3B are schematic cross-sectional and top views of a known electronic device with an OLED display integrated with a camera module.

4 is a schematic cross-sectional view of a polarizing plate 42 suitable for electronic devices drawn according to an embodiment of the present invention.

FIG. 5 is a schematic cross-sectional view of a method for manufacturing a polarizing film 422 drawn according to an embodiment of the present invention.

6A, 6B, and 6C are respectively a cross-sectional view and a top view diagram of an electronic device including a polarizing plate 42, a display element 63a or 63b, and a camera module 64a or 64b drawn according to an embodiment of the present invention.

421: The first protective film

422: Polarizing film

423: second protective film

42: Polarizing plate

42a: first polarization zone

42b: second polarization zone

Claims (3)

A polarizing plate, comprising: a first protective film; a second protective film; and a polarizing film disposed between the first protective film and the second protective film, and the polarizing film includes a first polarizing zone And a second polarization zone; wherein the polarization of the first polarization zone is greater than 99.9% and less than 100%, and the light transmittance is between 40% and 45%; the polarization of the second polarization zone is not less than 90% and Not more than 99.9%, and the light transmittance is between 45% and 48%. An electronic device comprising a display element including a display area; a polarizing plate placed on the display element; and a camera module integrated into the display element, wherein the display area includes a camera module Functional zone; wherein the polarizing plate includes a first polarization zone and a second polarization zone with different polarization characteristics, and wherein the polarization and transmittance of the first polarization zone and the second polarization zone are different, the first polarization The polarization of the area is greater than 99.9% and less than 100%, and the light transmittance is between 40% and 45%, and the first polarization area covers the area outside the functional area of the camera module in the display area, the second The degree of polarization of the polarized light zone is not less than 90% and not more than 99.9%, and the light transmittance is between 45% and 48%, and

The second polarization zone is located on the functional zone of the camera module. The electronic device according to claim 2, wherein the second polarization zone substantially completely covers the functional zone of the camera module.

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