CN1327172A - High brightness wide view angle free scale nanometer type image screen - Google Patents

Abstract

The invention relates to a high-brightness, wide-viewing angle, free-scale nano-type image screen. The preparation process is to firstly mix the main material and the nano-powder evenly in proportion, and add a brightening agent and an initiator at a certain temperature to initiate polymerization. The material is poured into the mold, pre-polymerized, shaped, and finally heated up rapidly, strongly polymerized, cooled with the furnace, and demolded. The image screen prepared by the method of the present invention is a passive image image screen with a new light-emitting principle, which has high brightness, high resolution, high color fidelity, high contrast, wide viewing angle, no color drift at different angles, and no reflection. , strong consistency, low cost, light weight and other advantages.

Description

High brightness and wide viewing angle free-scale nano-type video screen

The invention relates to a high-brightness, wide-angle free-scale nano-image screen, which belongs to the technical field of display devices.

At present, common large-screen video display devices have the following several types: large-screen TV sets, TV curtain walls, LED electronic display screens, plasma display devices (PDP) and projection TV sets. However, large-screen TVs, TV curtain walls, LED electronic display screens, and plasma display devices (PDPs) have complex manufacturing processes, high costs, and bulky, heavy, and large-screen video displays. The development of large-screen video displays is becoming increasingly difficult. The structure of the projection TV is the lightest, the most convenient to use, and the price is low, so it has become the fastest-growing and most widely used device in the large-screen video display devices with a diagonal size of more than 50 inches. The projection screen is an important part of the projection TV, and its quality has a great influence on the projection effect.

The purpose of the present invention is to propose a high-brightness, wide-angle free-scale nano-scale video screen, which is a new type of passive image video screen based on the principle of light emission. A display device that can emit high-intensity viewing images and colors in all directions without distortion. Its main body is a soft board device composed of light-transmitting organic materials and inorganic nanomaterials, which can be made into devices of various sizes and super-large sizes. Small devices can be seamlessly assembled into large-area display devices, overcoming the past flat-panel electronics. Due to the limitation of the size of the display device, it has the disadvantage of discontinuous interface image when assembled into a large-area display screen, and it is an optical image display device that is light in weight, cheap, easy to carry, and has a wide range of applications in various image display occasions. .

The high-brightness screen of the present invention uses acrylic esters or styrene esters and nano-scale inorganic powders to be mixed and polymerized, and a specific process is used to directly synthesize a soft image display device whose thickness can be controlled to about 1 mm, which can be used directly or Composite on the substrate to form a hard screen. Breaking through the limitations of traditional technology, the transmission of light in the screen does not rely on simple scattering, nor does it use lenses to change the optical path or focus. , a new type of projection display that can be front-projected and rear-projected without being affected by ambient light.

The preparation process of the free-scale nano-type video screen with high brightness and wide viewing angle of the present invention includes the following steps:

1. Use the following proportions of materials,

Main material 60～95%,

The host material can be methyl methacrylate or styrene, or its polymer, namely polymethyl methacrylate or polystyrene;

Plasticizer 5-40%;

Above-mentioned plasticizer can be any one in butyl acrylate, dioctyl phthalate or dibutyl phthalate;

Nano-powder brightening agent: SiO ₂ nano-powder 0.01-0.8%, Al ₂ O ₃ nano-powder 0-0.05%, all depolarized;

Initiator: 0.01～0.5%

Above-mentioned initiator can be azobisisobutyronitrile or ammonium persulfate;

2. Mix the main material and the nano-powder evenly according to the above ratio, and add the brightener and the initiator in turn at a temperature of 70-100°C and mix thoroughly to initiate polymerization for 5-30 minutes.

3. Pour the initiation polymerization material in the second step above into a mold with a thickness of 1mm, prepolymerize at 30-60°C for 20-30 hours, and shape.

4. Rapidly raise the temperature to 70-110°C, intensively polymerize for 1-8 hours, cool down with the furnace, and demould.

The high-brightness wide viewing angle free-scale nano-type image screen prepared by the method of the present invention has high brightness, high resolution, high color fidelity, high contrast, wide viewing angle, no color drift at different angles, no reflection, strong consistency, Low cost, light weight and other advantages. It can be made into a super-large size, any three-dimensional (stereo) shape, can be cut, can be bent, can be front-projected, rear-projected, and viewed at 360°. It is not affected by ambient light and has a wide range of applications. It can be used in large-screen HDTVs, concert halls, conference rooms, shopping malls, airports, exhibition halls, restaurants, advertising boards, control room curtain walls, high-resolution monitors, etc. Since the light-scattering substance is embedded in the resin, maintenance is also relatively easy.

Introduce the embodiment of the present invention below:

Example 1:

65% of methyl methacrylate, 34.8% of dioctyl phthalate, 0.03% of non-polar nano-SiO ₂ powder, 0.02% of Al ₂ O ₃ nano-powder, and 0.15% of azobisisobutyronitrile. Mix methyl methacrylate, SiO ₂ nano powder, and Al ₂ O ₂ nano powder, and stir well until uniform; add plasticizer phthalyldioctyl dioctyl ester, initiator azobisisobutyronitrile at 75°C At the same time, add a small amount of release agent silicone oil, stir well until uniform, and carry out the first stage of initiated polymerization. Fill the mold and carry out prepolymerization at 45°C for 28 hours. The temperature was raised vigorously to 75° C., and the polymerization was carried out intensively for 2 hours. Cool in the furnace and demould.

Example 2:

75% methyl methacrylate, 24.7% dioctyl phthalate, 0.1% non-polar nano-SiO2 powder, 0.05% Al2O3 nano-powder, 0.15% azobisisobutyronitrile. Mix methyl methacrylate, SiO2 nano-powder, Al2O3 nano-powder, fully stir until uniform; add plasticizer phthalyl dioctyl, initiator azobisisobutyronitrile, mold release agent at 85°C Silicone oil, stir well until uniform, and carry out the first stage of initiated polymerization. Fill the mold and carry out prepolymerization at 55°C for 28 hours. The temperature was violently raised to 85° C., and the polymerization was carried out vigorously for 3 hours. Cool in the furnace and demould.

Example 3:

85% of methyl methacrylate, 14.5% of dioctyl phthalate, 0.3% _of non-polar nano- _SiO2 powder, 0.05% of _Al2O3 nano-powder, and 0.15% of ammonium persulfate. Mix methyl methacrylate, SiO ₂ nanometer powder, and Al ₂ O ₃ nanometer powder, and stir well until uniform; add plasticizer phthalyl dioctyl dioctyl, initiator ammonium persulfate, demoulding at 95°C agent silicone oil, fully stirred until uniform, and the first stage of initiated polymerization was carried out. Fill the mold and carry out prepolymerization at 35°C for 28 hours. The temperature was violently raised to 110° C., and the polymerization was carried out vigorously for 1 hour. Cool in the furnace and demould.

Example 4:

Methyl methacrylate 95%, o-phthalylene dibutyl ester 4%, non-polar nano-SiO ₂ powder 0.7%, azobisisobutyronitrile 0.3%. Mix methyl methacrylate and SiO ₂ nanometer powder, stir well until uniform; add plasticizer o-phthalylene dibutyl ester, initiator azobisisobutyronitrile, mold release agent silicone oil at 90°C, fully Stir until uniform, and carry out the first stage of initiated polymerization. Fill the mold and carry out prepolymerization at 50°C for 28 hours. The temperature was violently raised to 95° C., and the polymerization was carried out intensively for 5 hours. Cool in the furnace and demould.

Example 5:

Methyl methacrylate 80%, butyl acrylate 19.75%, non-polar nano-SiO ₂ powder 0.2%, azobisisobutyronitrile 0.05%. Mix methyl methacrylate and SiO ₂ nanometer powder, and stir until uniform; add plasticizer butyl acrylate, initiator azobisisobutyronitrile at 90°C, and add a small amount of release agent silicone oil at the same time, and stir until fully Homogeneous, the first stage of initiated polymerization is carried out. Fill the mold and carry out prepolymerization at 50°C for 28 hours. The temperature was violently raised to 100° C., and the polymerization was carried out vigorously for 2 hours. Cool in the furnace and demould.

Embodiment 6:

Styrene 90%, butyl acrylate 9.75%, non-polar nano-SiO ₂ powder 0.2%, ammonium persulfate 0.05%. Mix styrene and _SiO2 nano-powders, stir well until uniform; add plasticizer butyl acrylate, initiator ammonium persulfate at 90°C, and add a small amount of release agent silicone oil, stir well until uniform, and carry out the first stage trigger polymerization. Fill the mold and carry out prepolymerization at 50°C for 28 hours. The temperature was violently raised to 100° C., and the polymerization was carried out vigorously for 2 hours. Cool in the furnace and demould.

Claims (5)

1. A high-brightness, wide-angle free-scale nano-scale video screen, characterized in that the preparation method of the video screen comprises the following steps: (1) Use the following ratio of materials, main material 60-95%; plasticizer 5-40%; nano-powder brightening agent: _SiO2 nano-powder 0.01-0.8%, _{Al2O3 nano} -powder 0-0.05%; Initiator: 0.01～0.5%; (2) Uniformly mix the main material and the nanopowder according to the above ratio, and add the brightening agent and the initiator in turn at a temperature of 70-100° C. and fully mix to initiate polymerization for 5-30 minutes; (3) Pour the initiation polymerization material in the second step above into a model with a thickness of 1 mm, prepolymerize at 30 to 60° C. for 20 to 30 hours, and form it; (4) Rapidly raise the temperature to 70-110°C, intensively polymerize for 1-8 hours, cool down with the furnace, and demould. 2. The preparation method according to claim 1, wherein the plasticizer is any one of butyl acrylate, dioctyl phthalate or dibutyl phthalate. 3. The preparation method according to claim 1, wherein the initiator is azobisisobutyronitrile or ammonium persulfate. 4. The preparation method according to claim 1, wherein said host material is methyl methacrylate or styrene. 5. The preparation method according to claim 1, wherein said host material is polymethyl methacrylate or polystyrene.