阅读说明：本技术 陶瓷基体激光电视显示屏及其制作方法 (Ceramic matrix laser television display screen and manufacturing method thereof ) 是由 张万里 李栋 于 2020-12-14 设计创作，主要内容包括：本发明涉及一种激光电视显示屏,具体涉及一种陶瓷基体激光电视显示屏及其制作方法。所述的陶瓷基体激光电视显示屏,包括陶瓷大板,所述的陶瓷大板的上方依次覆有黑色釉层和无光釉层。其制备方法为：1)压制陶瓷大板坯体,干燥；2)第一次施釉：在坯体上施黑色釉,干燥；3)第二次施釉：在施黑色釉之后的坯体上施无光釉；4)将施釉后的坯体送入窑炉中烧制,出窑冷却后,检验合格,得陶瓷基体激光电视显示屏。本发明的显示器具有无光、失透、黑色的特征,对于激光电视起到抗光、分光、吸光的作用,增强激光信号,提高图像清晰度,保证图像的对比度,其制作方法,科学合理、简单易行。(The invention relates to a laser television display screen, in particular to a ceramic substrate laser television display screen and a manufacturing method thereof. The ceramic substrate laser television display screen comprises a ceramic large plate, wherein a black glaze layer and a matt glaze layer are sequentially covered above the ceramic large plate. The preparation method comprises the following steps: 1) pressing a ceramic large plate blank body and drying; 2) glazing for the first time: applying black glaze on the green body, and drying; 3) and (3) glazing for the second time: applying a matt glaze on the blank after the black glaze is applied; 4) and (4) feeding the glazed green body into a kiln for firing, taking out of the kiln for cooling, and inspecting to be qualified to obtain the ceramic matrix laser television display screen. The display has the characteristics of no light, devitrification and black, plays the roles of light resistance, light splitting and light absorption for the laser television, enhances laser signals, improves the definition of images and ensures the contrast of the images, and the manufacturing method of the display is scientific, reasonable, simple and easy to implement.)

1. A ceramic matrix laser television display screen is characterized in that: the ceramic plate comprises a ceramic large plate, wherein a black glaze layer and a matt glaze layer are sequentially covered above the ceramic large plate.

2. Ceramic substrate laser television display screen according to claim 1, characterized in that: the black glaze layer is prepared by glaze and black ceramic pigment.

3. A ceramic substrate laser television display screen as defined in claim 2, wherein: the using amount of the black ceramic pigment is 4-6% of the mass of the glaze.

4. Ceramic substrate laser television display screen according to claim 1, characterized in that: the glossiness of the matt glaze adopted by the matt glaze layer is less than 30 degrees.

5. Ceramic substrate laser television display screen according to claim 4, characterized in that: the glossiness of the matt glaze adopted by the matt glaze layer is 3-30 degrees.

6. Ceramic substrate laser television display screen according to claim 1, characterized in that: the thickness of the matt glaze layer is 20-120 microns.

7. A method for manufacturing a ceramic substrate laser television display screen as claimed in any one of claims 1 to 6, wherein: the method comprises the following steps:

1) pressing a ceramic large plate blank body and drying;

2) glazing for the first time: applying black glaze on the blank body, wherein the glazing amount is 180-200 g/square meter, and drying;

3) and (3) glazing for the second time: applying matt glaze on the blank body after the black glaze is applied, wherein the glazing amount is 200-220 g/square meter;

4) and (4) feeding the glazed green body into a kiln for firing, taking out of the kiln for cooling, and inspecting to be qualified to obtain the ceramic matrix laser television display screen.

8. The method of claim 7, wherein the method comprises: the firing temperature is 1200-1220 ℃, and the firing time is 100-120 minutes.

Technical Field

The invention relates to a laser television display screen, in particular to a ceramic substrate laser television display screen and a manufacturing method thereof.

Background

The technology of building ceramics is becoming more mature, and the ceramic products with high flatness can be produced, and the maximum ceramic products with the size of 3200mm 1600mm 3mm can be produced (the size of a 100 inch television screen is 2032mm 1524mm or 2214mm 1245mm, and the size of an 80 inch television screen is 1810mm 1110 mm). The required size of the screen can be achieved by means of finished product cutting or by changing the mould with corresponding size by a press. The current ceramic production process can realize precise control to meet the requirements of material functionalization.

The laser television has excellent color gamut expressive force, is energy-saving and environment-friendly, and is the development direction in the future. At present, two types of laser television display screens in the market are mainly a Fresnel screen and a black grid screen, wherein the Fresnel screen and the black grid screen are mechanically manufactured to realize the microstructure, the microstructure with uniform micron scale cannot be achieved, various problems occur due to the fact that the microstructure is far away from the wavelength (400nm-700nm) of a laser television, laser speckles are obvious, picture expression is fuzzy and unclear, and laser signals cannot be completely expressed. At present, the definition of a television is mostly 25-90PPI due to the limitation of the microstructure, and according to the laser law, the minimum size of a light spot can reach below 1 μm when D is 0.122 laser wavelength/aperture diameter of an objective lens.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the display screen has the characteristics of no light, devitrification and black, plays the roles of light resistance, light splitting and light absorption for the laser television, enhances laser signals, improves image definition and ensures the contrast of images; the invention also provides a preparation method of the medicine, which is scientific, reasonable, simple and feasible.

The ceramic substrate laser television display screen comprises a ceramic large plate, wherein a black glaze layer and a matt glaze layer are sequentially covered above the ceramic large plate. The goal of reducing the ambient light and completely reflecting the color and the definition of the laser is realized.

Wherein:

the black glaze layer is prepared by glaze (colored glaze) and black ceramic pigment. Preferably, the black ceramic pigment is used in an amount of 4 to 6%, preferably 5%, by mass of the glaze.

The glossiness of the matt glaze adopted by the matt glaze layer is less than 30 degrees, so that the requirement of laser television display is met. Preferably, the gloss of the matt glaze layer is 3-30 degrees. The matt glaze is also called a matt glaze, a press polish glaze or a soft glaze.

The invention relates to a manufacturing method of a ceramic matrix laser television display screen, which comprises the following steps:

1) pressing a ceramic large plate blank body and drying;

2) glazing for the first time: applying black glaze on the blank body, wherein the glazing amount is 180-200 g/square meter, and drying;

3) and (3) glazing for the second time: applying matt glaze on the blank body after the black glaze is applied, wherein the glazing amount is 200-220 g/square meter;

4) and (3) delivering the glazed green body into a kiln (the length of the kiln is 270 meters, and the inner width is 3 meters) for firing, taking out of the kiln for cooling, and checking to be qualified to obtain the ceramic matrix laser television display screen.

In the step 1), the pressed ceramic large plate blank body is pressed according to the television size by adopting the existing building ceramic large plate preparation process, and the details are not repeated.

In the step 4), the firing temperature is 1200-1220 ℃, and the firing time is 100-120 minutes, preferably 100 minutes.

The principle of the invention is as follows:

the surface of the ceramic panel is a matt glaze (gloss 3 to 30 degrees) which provides diffuse reflection of all light, greatly reducing its intensity for ambient light, and forming a large viewing angle visible television image on the screen for laser signals.

The glaze layer below the surface layer of the glaze surface fully contains devitrified crystals and residual crystal grains, a large number of crystal boundaries exist in the glaze layer, laser entering through the surface layer refraction is reflected and refracted for many times, a large part of light can be refracted to the outside of the glaze layer, and the brightness of a television image is further increased. After multiple reflection and refraction, the laser is greatly reduced in intensity and then enters a black glaze layer below the matt glaze, the black glaze layer absorbs most of residual light, a small part of light enters the glaze layer again to undergo multiple reflection and refraction, and a very small number of light can rush out of the glaze layer again, so that the television image is further enhanced. Most importantly, the black glaze layer can be in black color under the condition that no three lasers are irradiated, so that the contrast of a television image is improved.

Meanwhile, the thickness of the matt glaze layer is 20-120 microns. The glaze layer contains a plurality of crystals with the size of 0.5-10 microns, a plurality of crystal boundaries are formed to prevent light from transmitting in a long distance in the direction of the glaze layer, and the light intensity is reduced by 50 microns on the surface of the glaze layer, wherein the light intensity is reduced by 0.85 microns, the laser radius is 50 microns, the excircle radius is 100 microns, the screen transmittance is 85%, the excircle radius is 100 microns, the light intensity is greatly reduced, the excircle area is a visible signal area, the size of the visible signal area is a circle with the size of 200 microns, 1 inch is equal to 25.4mm, and PPI is 25.4/0.2 is 127, and the precision is high enough to meet the display requirement of a television. If the laser diameter is 30 μm, the thickness of the glaze layer is 50 μm, the surface of the glaze layer is extended by 50 μm, the intensity of an extended circular optical signal is 0.85 × 15 × 15/65/65-0.0452, the signal is negligible, the glaze surface is extended by 20 μm, the light transmittance of 20 μm is calculated to be 0.937, the intensity of an optical signal is 0.937 × 15 × 15/35/35-0.1721, the size of an extended circle is 70 μm, and the PPI is 25.4/0.07-363, which are values enough to meet the requirements of a retina display screen. PPI increases significantly as the laser diameter is reduced. This enables the definition of the image of the television to be greatly guaranteed. (generally, TV PPI is 20-90, and there is no hard requirement, computer display PPI is 90-280, mobile phone PPI is 800 at 200-.

The materials of the matt glaze are dielectric materials which are transparent to visible light, which allows the laser light to be fully utilized.

The non-bright glaze is different from glass, the refractive index of the non-bright glaze reaches more than 1.65, according to Fresnel's law, the larger the refractive index of the material is, the higher the reflection coefficient of the material is, compared with other materials, in the first reflection, more laser is converted into an image signal, and therefore the wide visual angle of the material is guaranteed.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention is based on ceramic slab body, sequentially applies black glaze layer (prepared by glaze and black ceramic pigment) and matt glaze layer, and is fired at high temperature. The diffuse reflection surface strongly weakens the influence of ambient light, the glaze layer realizes the reflection and refraction of laser signals, the signal brightness is enhanced, and the black color layer provides the picture contrast.

2. The invention integrates the architectural ceramic technology with the display requirements of the laser television and expands the ceramic technology to the laser display field.

3. The ceramic substrate laser television display screen has the characteristics of no light, devitrification and black color, has the functions of light resistance, light splitting and light absorption for a laser television, enhances laser signals and improves image definition. Meanwhile, the contrast of the image is ensured.

4. The preparation method of the invention is scientific, reasonable, simple and feasible.

Detailed Description

The present invention is further illustrated by the following examples, but the scope of the present invention is not limited thereto, and modifications of the technical solutions of the present invention by those skilled in the art should be within the scope of the present invention.

Two glazes glazed with water jet used in the examples:

the glaze of the black glaze comprises the following components in percentage by mass: 32% of potash feldspar, 15% of albite, 2% of calcite, 4% of dolomite, 7% of barium carbonate, 1% of zinc oxide, 3% of alumina, 16% of quartz, 5% of calcined kaolin, 4% of calcined talc, 4% of high-temperature frit and 7% of zirconium silicate. The amount of the black agent is 5 percent of the total mass of the glaze.

The matt glaze comprises the following components in percentage by mass: 10% of potash feldspar, 20% of albite, 16% of dolomite, 6% of calcite, 18% of barium carbonate, 14% of kaolin, 3% of zinc oxide, 6% of calcined talc and 7% of calcined kaolin.

The gloss of the matt glaze is 26.

The two glazes are added with 0.1 percent of CMC (carboxymethyl cellulose), 0.3 percent of STPP (sodium tripolyphosphate) and 40 percent of water, and are ball-milled to 0.15 to 0.2g/100mL (320 mesh sieve).

Digital glaze used in examples:

the black glaze comprises the following components in parts by mass: 15 parts of high-temperature frit, 58 parts of quartz, 6 parts of calcined talc, 6 parts of potassium feldspar, 11 parts of calcined kaolin, 4 parts of zirconium silicate, 50 parts of water, 5 parts of ethylene glycol and 5 parts of cobalt black pigment.

The matt glaze comprises the following components in parts by mass: 39 parts of high-temperature frit, 36 parts of medium-temperature dull frit, 20 parts of low-temperature dull frit, 5 parts of zirconium silicate, 50 parts of water and 5 parts of ethylene glycol.

The gloss of the matt glaze is 18.

Both of them were ground to 5 μm by a sand mill for use.

The three frits have the following chemical components in percentage by mass:

high temperature matte frit

Al2O3	SiO2	CaO	MgO	K2O	Na2O	ZrO2	BaO	ZnO	SrO	Fe2O3	TiO2	LOSS
													17.40	45.68	2.30	0.90	1.54	5.07	0.20	16.75	6.27	3.56	0.11	0.11	0.05

Intermediate-temperature matte frit

Al2O3	SiO2	Fe2O3	CaO	MgO	K2O	Na2O	ZnO	B2O3	BaO	LOSS
											16.27	49.51	0.08	10.11	0.99	3.92	2.46	4.00	0.67	11.43	0.17

Low-temperature matte frit

Al2O3	SiO2	Fe2O3	CaO	MgO	K2O	Na2O	ZnO	B2O3	BaO	LOSS
											9.68	51.02	0.10	12.21	2.62	3.55	2.19	5.71	2.11	10.62	0.11

Example 1

The thickness of the large ceramic plate blank is 3mm, and the black glaze and the matt glaze are all made into nanoscale digital glaze and are implemented by a large ink jet printer.

Wherein: the glazing amount of the black glaze is 190 g/square meter, and the glazing amount of the matt glaze is 210 g/square meter.

And (3) putting the glazed green body into a kiln for firing (the firing temperature is 1210 ℃, the firing time is 110 minutes), taking out of the kiln for cooling, and checking to be qualified to obtain the ceramic matrix laser television display screen.

The gloss of the display was 18.

Example 2

The thickness of the large ceramic plate blank is 6mm, and the black glaze and the matt glaze are glazed by adopting a reciprocating water jet knife.

Wherein: the glazing amount of the black glaze is 200 g/square meter, and the glazing amount of the matt glaze is 220 g/square meter.

And (3) putting the glazed green body into a kiln for firing (the firing temperature is 1200 ℃, the firing time is 120 minutes), taking out of the kiln for cooling, and checking to be qualified to obtain the ceramic matrix laser television display screen.

The gloss of the display was 26.

Example 3

The thickness of the large ceramic plate blank is 6mm, the black glaze is glazed by a reciprocating water jet cutter, and the matt glaze is realized by ink jet of a digital machine.

Wherein: the glazing amount of the black glaze is 180 g/square meter, and the glazing amount of the matt glaze is 200 g/square meter.

And (3) putting the glazed green body into a kiln for firing (the firing temperature is 1210 ℃, the firing time is 110 minutes), taking out of the kiln for cooling, and checking to be qualified to obtain the ceramic matrix laser television display screen.

The gloss of the display was 17.

Example 4

The thickness of the large ceramic plate blank is 9mm, and the black glaze and the matt glaze are glazed by adopting a reciprocating water jet knife.

Wherein: the glazing amount of the black glaze is 190 g/square meter, and the glazing amount of the matt glaze is 210 g/square meter.

And (3) feeding the glazed green body into a kiln for firing (the firing temperature is 1220 ℃, the firing time is 100 minutes), taking out of the kiln for cooling, and inspecting to be qualified to obtain the ceramic matrix laser television display screen.

The gloss of the above display was 6.

Example 5

The thickness of the large ceramic plate blank is 6mm, the black glaze is glazed by a reciprocating water jet cutter, and the matt glaze is realized by ink jet of a digital machine.

Wherein: the glazing amount of the black glaze is 200 g/square meter, and the glazing amount of the matt glaze is 220 g/square meter.

And (3) feeding the glazed green body into a kiln for firing (the firing temperature is 1220 ℃, the firing time is 100 minutes), taking out of the kiln for cooling, and inspecting to be qualified to obtain the ceramic matrix laser television display screen.

The gloss of the display was 13.