Display device

Abstract

The utility model relates to the technical field of display, in particular to a display device. The display device provided by the utility model comprises a liquid crystal display, a first polaroid and a polarized light dispersion film which are sequentially stacked, the included angle between the stretching direction of the polarized light dispersion film and the polarization direction of the first polaroid is 45 + / -3 degrees. According to the display device, a fixed angle is formed between the stretching direction of the polarized light dispersion film and the polarization direction of the first polaroid, so that the optical effect of the polarized light dispersion film is improved, the polarization dispersion effect is good, and the dispersion effect is stable.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and more specifically, to a display device. Background Technology

[0002] With the development of display technology, more and more high-quality LCD display devices are gradually entering the market. Compared with other types of display devices, LCD display devices have advantages such as thinness, low power consumption, low voltage driving, low cost, easy colorization, high precision, high image quality, and high-speed response. LCD display devices are fully utilized in the displays of laptops, portable electronic devices, and portable televisions.

[0003] The light emitted by a liquid crystal display device is polarized light. Polarized light is more likely to cause visual fatigue. Current technology typically uses a quarter-wave plate to convert polarized light into circularly polarized light. However, because different wavelengths of light have different optical path lengths to wavelengths in the same medium, the resulting phase differences are also different. Therefore, multiple layers of film are required to convert circularly polarized light, and it is impossible to achieve the same effect for all types of light.

[0004] In view of the above, this utility model is hereby proposed. Utility Model Content

[0005] The purpose of this invention is to provide a display device that improves the optical effect of the polarization dispersion film, resulting in good and stable polarization dispersion.

[0006] In order to achieve the above-mentioned objectives of this utility model, the following technical solution is adopted:

[0007] This utility model provides a display device, including a liquid crystal display, a first polarizer and a polarizing light dispersion film arranged in sequence;

[0008] The angle between the stretching direction of the polarizing dispersion film and the polarization direction of the first polarizer is 45°±3°.

[0009] Furthermore, the polarization dispersion film includes a polarization dispersion optical unit, which includes any one of crystal particles, macromolecular aggregates, fiber aggregates, and multirefractive microcrystals.

[0010] Furthermore, the thickness of the polarizing light dispersion film is 0.01–0.08 mm.

[0011] Furthermore, a first adhesive is provided between the first polarizer and the polarizing dispersion film.

[0012] Furthermore, the first adhesive includes an optically transparent adhesive.

[0013] Furthermore, the liquid crystal display includes an array substrate, a liquid crystal layer, and a color filter substrate arranged sequentially, and the color filter substrate and the first polarizer are adjacent to each other.

[0014] Furthermore, a cover plate is provided on the side of the polarizing light dispersion film away from the first polarizer.

[0015] Furthermore, a touch layer is provided between the first polarizer and the color filter substrate.

[0016] Furthermore, a touch layer is provided between the polarizing light dispersion film and the cover plate.

[0017] Furthermore, a second polarizer and a light source structure are sequentially arranged on the side of the liquid crystal display away from the first polarizer.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] The display device of this invention achieves excellent results with a polarizing light dispersion film through an angle matching method. The stretching direction of the polarizing light dispersion film has a fixed angle of 45°±3° with the polarization direction of the first polarizer. This improves the optical effect of the polarizing light dispersion film, resulting in good and stable polarization dispersion. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the display device of this utility model.

[0022] Figure 2 This is a schematic diagram of the cutting of the polarization dispersion film of this utility model.

[0023] Figure 3 This is a schematic diagram showing the orientation of the first polarizer and the polarizing dispersion film of this utility model.

[0024] Figure label:

[0025] 1-Liquid crystal display; 2-First polarizer;

[0026] 3-Polarized light dispersion film. Detailed Implementation

[0027] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the embodiments described below are only some embodiments of this utility model, not all embodiments, and are only used to illustrate this utility model, and should not be regarded as limiting the scope of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall be followed. Where the manufacturers of reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] See Figure 1 The present invention provides a display device, comprising a liquid crystal display 1, a first polarizer 2 and a polarizing light dispersion film 3 arranged in sequence;

[0030] The angle between the stretching direction of the polarizing dispersion film 3 and the polarization direction of the first polarizer 2 is 45°±3°; typically, but not limitingly, for example, the angle between the stretching direction of the polarizing dispersion film 3 and the polarization direction of the first polarizer 2 can be 42°, 43°, 44°, 45°, 46°, 47° or 48°.

[0031] In the display device, the first polarizer 2 has the function of polarizing light; the polarization dispersion film 3 can convert polarized light into unpolarized light; the light is first polarized in the first polarizer 2 to form polarized light, and then the polarized light is incident on the polarization dispersion film 3, and then the polarization dispersion film 3 converts the polarized light into unpolarized light to form natural light. Converting polarized light into natural light can protect the viewer's eyes.

[0032] The stretching direction of the polarizing light dispersion film 3 refers to the direction in which the film material is stretched during the manufacturing process of the polarizing light dispersion film 3. During the manufacturing process of the polarizing light dispersion film 3, the film material is stretched and rolled up. If the film material is stretched in the width direction and almost no tension is applied in the rolling direction, then the stretching direction is the width direction. If no force is applied in the width direction during manufacturing, but force is applied in the rolling direction, then the stretching direction is the rolling direction. If multiple forces are acting, the stretching direction is the direction of the resultant force.

[0033] See Figure 2 In some embodiments, the rolling direction during the preparation of the polarization dispersion film is known. The polarization dispersion film is cut (cut until the shape of the polarization dispersion film 3 meets the display area requirements of the display device) according to the angle between the rolling direction and the polarization direction of the first polarizer 2 being 45°±3°, so that the angle between the stretching direction of the polarization dispersion film 3 and the polarization direction of the first polarizer 2 is 45°±3°.

[0034] See Figure 3 In some embodiments, the stretching direction during the preparation of the polarization dispersion film is known, and the polarization dispersion film is cut (cut until the shape of the polarization dispersion film 3 meets the display area requirements of the display device) to obtain the polarization dispersion film 3. The angle between the stretching direction of the polarization dispersion film 3 and the polarization direction of the first polarizer 2 is 45°±3°.

[0035] In some embodiments, the refractive index of the polarizing light dispersion film 3 in different directions is tested, and the one with the largest difference is selected as the stretching direction of the polarizing light dispersion film 3. The shape of the polarizing light dispersion film 3 conforms to the display area requirements of the display device, and the angle between the stretching direction of the polarizing light dispersion film 3 and the polarization direction of the first polarizer 2 is 45°±3°.

[0036] During the manufacturing process of the polarizing light dispersion film 3, the film material is stretched and rolled up. This process causes directional changes in the alignment (e.g., rod-shaped) of the nanomaterials within the film, the density of nanoparticles in each direction, and the macromolecular structure of the film material, resulting in differences in its optical properties in various directions. Typically, this manifests as differences in light transmittance and refractive index along the rolling direction, stretching direction, and thickness direction during the preparation of the polarizing light dispersion film 3. This leads to the polarizing light dispersion film 3 not achieving its ideal optical effect.

[0037] This invention achieves excellent results with a polarizing light dispersion film 3 through an angle matching method. The stretching direction during the preparation of the polarizing light dispersion film 3 has a fixed angle with the polarization direction of the emitted polarized light. For the polarizing light dispersion film 3, its polymer material forms a fibrous structure. Under stretching, the fibers constitute a local micro-grating. When the grating is at an angle of 45°±3° to the polarization direction, it can precisely decompose the polarized light into mutually perpendicular and equal components. Therefore, structurally, ensuring the aforementioned angle achieves better results.

[0038] In some preferred embodiments, the angle between the stretching direction of the polarizing dispersion film 3 and the polarization direction of the first polarizer 2 is 45°.

[0039] In some embodiments, the polarization dispersion film 3 includes a polarization dispersion optical unit, which includes any one of crystal particles, macromolecular aggregates, fiber aggregates, and multirefractive microcrystals; for example, the polarization dispersion film 3 includes a thermoplastic transparent plastic film with crystalline regions, specifically including a PET film formed by unidirectional stretching, and the crystalline regions are directionally arranged according to the stretching direction; or, the polarization dispersion film 3 is doped with dispersion particles.

[0040] The polarization dispersion film 3 can cause a diffuse, non-directional change in the positive polarization direction of polarized light. This invention does not strictly limit the material of the polarization dispersion film 3; any existing polarization dispersion film 3 can be used.

[0041] In some embodiments, the thickness of the polarization dispersion film 3 is 0.01 to 0.08 mm; typically, but not limitingly, for example, the thickness of the polarization dispersion film 3 can be 0.01 mm, 0.02 mm, 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm or 0.08 mm; the thickness of the polarization dispersion film 3 can be within the above range.

[0042] In some embodiments, a first adhesive is provided between the first polarizer 2 and the polarizing dispersion film 3; that is, the polarizing dispersion film 3 is attached to the surface of the first polarizer 2; the first adhesive is viscous, thereby tightly bonding the polarizing dispersion film 3 and the first polarizer 2.

[0043] In some embodiments, the first adhesive includes an optically transparent adhesive.

[0044] In some embodiments, the liquid crystal display 1 includes an array substrate, a liquid crystal layer and a color filter substrate arranged sequentially, and the color filter substrate and the first polarizer 2 are adjacent to each other.

[0045] In some embodiments, a cover plate is provided on the side of the polarizing dispersion film 3 away from the first polarizer 2.

[0046] In other embodiments, a touch layer is provided between the first polarizer 2 and the color filter substrate.

[0047] In other embodiments, a touch layer is provided between the polarized light dispersion film 3 and the cover plate.

[0048] In the display device of this embodiment, the first polarizer 2, the polarizing dispersion film 3, and the cover plate are connected in sequence; preferably, a second adhesive is provided between the polarizing dispersion film 3 and the cover plate.

[0049] Alternatively, the color filter substrate, touch layer, first polarizer 2, polarizing dispersion film 3 and cover plate are connected in sequence; preferably, a second adhesive is provided between polarizing dispersion film 3 and cover plate.

[0050] Alternatively, the color filter substrate, the first polarizer 2, the polarizing dispersion film 3, the touch layer, and the cover plate are connected in sequence; preferably, a second adhesive is provided between the polarizing dispersion film 3 and the touch layer;

[0051] More preferably, the second adhesive includes an optically transparent adhesive.

[0052] In some embodiments, a second polarizer and a light source structure are sequentially arranged on the side of the liquid crystal display away from the first polarizer 2; preferably, the light source structure can be a light-emitting diode (LED), a superluminescent diode (SLD), or a laser as a backlight.

[0053] Example 1

[0054] The display device provided in this embodiment includes a light source structure, a second polarizer, an array substrate, a liquid crystal layer, a color filter substrate, a touch layer, a first polarizer 2, a polarizing light dispersion film 3, and a cover plate arranged in sequence.

[0055] An optically transparent adhesive is provided between the first polarizer 2 and the polarizing light dispersion film 3, and an optically transparent adhesive is provided between the polarizing light dispersion film 3 and the cover plate;

[0056] The angle between the stretching direction of the polarizing dispersion film 3 and the polarization direction of the first polarizer 2 is 45°; the polarizing dispersion film is made of PET film formed by unidirectional stretching, and the crystalline regions are directionally arranged according to the stretching direction, with a thickness of 0.08 mm.

[0057] Comparative Examples 1-10

[0058] The display device provided in this comparison refers to Embodiment 1, the only difference being that the angle between the stretching direction of the polarizing dispersion film 3 and the polarization direction of the first polarizer 2 is 0°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, and 90°, respectively.

[0059] A polarizer was placed in front of the display devices of Example 1 and Comparative Examples 1 to 10, and then the polarizer was rotated to obtain the non-polarization rate. The results are shown in Table 1.

[0060] Unpolarization ratio refers to the ratio of the minimum brightness (min) to the maximum brightness (max) of the emitted light after it has been treated with a polarizing film and the brightness of its components in the 0-360° direction is extracted by a rotating polarizer.

[0061] The angles in Table 1 are the angles between the stretching direction of the polarizing dispersion film and the polarization direction of the first polarizer.

[0062] Table 1

[0063] Angle (°) min max ratio 0 46.1 48.9 0.94274 10 46.5 48.6 0.95679 20 46.8 48.9 0.957055 30 47.2 48.9 0.965235 40 47.6 48.4 0.983471 45 48.1 48.2 0.997925 50 47.8 48.4 0.987603 60 47.3 48.5 0.975258 70 47 49.4 0.951417 80 46.4 49.8 0.931727 90 46.1 49.9 0.923848

[0064] As shown in Table 1, the minimum brightness is closest to the maximum brightness at 45°; that is, the effect is best when the angle between the stretching direction of the polarizing dispersion film 3 and the polarization direction of the first polarizer 2 is 45°. The structure of this invention can be applied to display devices with touch screens or cover plates.

[0065] Although the present invention has been illustrated and described with specific embodiments, it should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it; those skilled in the art should understand that modifications can be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein, without departing from the spirit and scope of the present invention; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention; therefore, this means that all such substitutions and modifications that fall within the scope of the present invention are included in the appended claims.

Claims

1. A display device, characterized in that, It includes a liquid crystal display, a first polarizer, and a polarizing dispersion film stacked sequentially. The polarization dispersion film includes a polarization dispersion optical unit; the polarization dispersion optical unit includes any one of crystal particles, macromolecular aggregates, fiber aggregates, and multirefractive microcrystals. The polarizing light dispersion film includes a thermoplastic transparent plastic film with crystalline regions, and the angle between the arrangement direction of the crystalline regions and the polarization direction of the first polarizer is 45°±3°.

2. The display device according to claim 1, characterized in that, The thickness of the polarizing dispersion film is 0.01~0.08 mm.

3. The display device according to claim 2, characterized in that, A first adhesive is disposed between the first polarizer and the polarizing dispersion film.

4. The display device according to claim 3, characterized in that, The first adhesive includes an optically transparent adhesive.

5. The display device according to claim 3, characterized in that, The liquid crystal display includes an array substrate, a liquid crystal layer, and a color filter substrate arranged in sequence, and the color filter substrate is adjacent to the first polarizer.

6. The display device according to claim 5, characterized in that, A cover plate is provided on the side of the polarizing light dispersion film away from the first polarizer.

7. The display device according to claim 6, characterized in that, A touch layer is provided between the first polarizer and the color filter substrate.

8. The display device according to claim 6, characterized in that, A touch layer is provided between the polarizing light dispersion film and the cover plate.

9. The display device according to claim 6, characterized in that, The liquid crystal display has a second polarizer and a light source structure arranged sequentially on the side away from the first polarizer.

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