CN108956094B - Semi-transparent display cabinet for LCD polarized glasses test screen - Google Patents
Semi-transparent display cabinet for LCD polarized glasses test screen Download PDFInfo
- Publication number
- CN108956094B CN108956094B CN201710374877.0A CN201710374877A CN108956094B CN 108956094 B CN108956094 B CN 108956094B CN 201710374877 A CN201710374877 A CN 201710374877A CN 108956094 B CN108956094 B CN 108956094B
- Authority
- CN
- China
- Prior art keywords
- display cabinet
- polarized glasses
- display
- semi
- cabinet body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
- A47F3/00—Show cases or show cabinets
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1313—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells specially adapted for a particular application
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Analytical Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a semi-transparent display cabinet for a test screen of LCD polarized glasses, which comprises a display cabinet body, wherein a display rack is arranged in the display cabinet body, a backlight module is arranged in the display cabinet body, an LED lamp belt is arranged on the display cabinet body at the upper end of the backlight module, a liquid crystal module is arranged on the outer side of the display cabinet body, and the liquid crystal module is driven by a matched main board. The structure of the invention is a simple product for realizing the authenticity of the polarized glasses by using the light filtering characteristic of the orthogonal polarizing plate according to the LCD display principle, when the polarized glasses are sold, the display characteristic of the LCD screen is utilized to make a dynamic color image which enables a customer to experience high quality under the condition that the upper polarizing plate is removed or the whole area of the upper polarizing plate is not reserved, and under the condition, the semi-transparent LCD screen is used for displaying the product, thereby providing high-quality customer experience and anti-counterfeiting function for the LCD screen in the identification, use and popularization and display of the glasses industry.
Description
Technical Field
The invention relates to the field of polarized glasses testing, in particular to a display cabinet of a semi-transparent LCD polarized glasses testing screen.
Background
The LCD imaging technology is that liquid crystal is set between two pieces of conducting glass, and driven by the electric field between two electrodes to produce twisted nematic electric field effect of liquid crystal molecules to control the light source transmission or shielding function, so that light and shade are produced between the power switch to display the image. The two glass substrates are provided with a pair of orthogonal polarizing films, so that liquid crystal can be aligned along the grooves, liquid crystal molecules become twisted because the grooves of the alignment films of the glass substrates deviate by 90 degrees, when no electric field is added to the glass substrates, light passes through the polarizing plates to be twisted by 90 degrees along with the liquid crystal, and the liquid crystal panel displays white through the lower polarizing plate; when an electric field is applied to the glass substrate, the liquid crystal molecules are aligned, light passes through the gaps of the liquid crystal molecules to maintain the original direction, the light is shielded by the polarizing plate below, the light is absorbed and cannot penetrate out, and the liquid crystal panel displays black. The liquid crystal display makes the panel achieve the display effect according to the existence of the voltage, a polarizer is necessarily used in the imaging technology of the liquid crystal display, and the polarizer is glasses with the highest cost performance and technology content in the glasses market at the present stage, and the polarizer and the glasses have certain commonality.
Polarized glasses on the market are various at present, however, the effect monitoring devices are few and few, and many users buy the polarized glasses home and find that the display effect can not reach the effect of propaganda, so we provide a semi-transparent LCD polarized glasses test screen display cabinet for solving the problems.
Disclosure of Invention
The invention aims to provide a semi-transparent display cabinet for a test screen of LCD polarized glasses, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a semi-permeable LCD polaroid glasses test screen show cupboard, includes the show cupboard body, the internal show shelf that is equipped with of show cupboard, the internal backlight unit that is equipped with of this show cupboard, backlight unit the inner is inner at the show cupboard body through inferior gram force board fixed mounting, be equipped with reflectance coating, light guide plate, interior diffusion barrier, positive and negative membrane of intensifying and outer diffusion barrier in proper order on the outside of inferior gram force board, be equipped with LED lamp area on the show cupboard body of backlight unit upper end, this show cupboard body outside is equipped with liquid crystal module, liquid crystal module includes inferior gram force board frame, inferior gram force board frame fixed mounting is on the outer terminal surface of show cupboard, and installs 90 degrees polaroid, liquid crystal glazing and filter plate in proper order from inside to outside on the inferior gram force board frame, and this liquid crystal module is driven by the mainboard that.
Preferably, the display cabinet body is of a cuboid structure, and the shape and size of the backlight module are consistent with the size of the cross section of the display cabinet body.
Preferably, the display rack is of a disc-shaped structure, the bottom end of the display rack can be connected with a driving device, so that the display rack rotates in the display cabinet body, and the display rack is provided with display articles.
Preferably, the motherboard 8 includes an image system 1080P or 720P, a picture system, a sound system, a power system, an SD card slot and reading system, and a USB slot and reading system.
The using method comprises the following steps:
s1: selecting a positive polaroid negative plate, namely when the rear polaroid is 90 degrees, the angle of the front orthogonal polaroid is 0 degree, placing the display article in the display cabinet under the condition, and under the condition of not wearing polarizing glasses, a tester can see the display article in the display cabinet as shown in figure 4;
s2: when the polarized glasses are normally worn, the lens of the polarized glasses is 0 degrees and serves as the filtering effect of the upper polarizer, and a tester can see images displayed on the display cabinet of the test screen of the semi-transparent LCD polarized glasses and display articles in the display cabinet body by wearing the polarized glasses, as shown in fig. 5;
s3: under the condition that the semi-transparent LCD polarized glasses test screen is electrified, the matched main board drives the liquid crystal module to play video images or pictures, and a tester cannot see the video images or pictures in the display cabinet when not wearing the polarized glasses, as shown in FIG. 6;
s4: when the tester wears the polarized glasses to be tested, the tester sees the video images or pictures displayed by the display cabinet, as shown in fig. 7.
Compared with the prior art, the invention has the beneficial effects that: the structure of the invention is a simple product for realizing the authenticity of the polarized glasses by using the light filtering characteristic of the orthogonal polarizing plate according to the LCD display principle, when the polarized glasses are sold, the display characteristic of the LCD screen is utilized to make a dynamic color image which enables a customer to experience high quality under the condition that the upper polarizing plate is removed or the whole area of the upper polarizing plate is not reserved, and under the condition, the semi-transparent LCD screen is used for displaying the product, thereby providing high-quality customer experience and anti-counterfeiting function for the LCD screen in the identification, use and popularization and display of the glasses industry.
Drawings
FIG. 1 is a schematic view of a display case structure according to the present invention;
FIG. 2 is a schematic view of a backlight module according to the present invention;
FIG. 3 is a schematic view of a liquid crystal module according to the present invention;
FIG. 4 is a schematic diagram showing the effect of the present invention when the main board is not powered and the polarized glasses are not worn;
FIG. 5 is a schematic diagram showing the effect of the polarized glasses of the present invention when the main board is not powered;
FIG. 6 is a schematic diagram showing the effect of the present invention when the main board is powered on and the polarized glasses are not worn;
fig. 7 is a schematic view showing the effect of the polarized glasses worn by the user when the main board is powered on.
In the figure: the display cabinet comprises a display cabinet body 1, a backlight module 2, an outer diffusion film 21, a positive and negative crossed bright enhancement film 22, an inner diffusion film 23, a light guide plate 24, a reflective film 25, an acrylic plate 26, a display rack 3, a liquid crystal module 4, an acrylic plate outer frame 41, liquid crystal glass 42, a polarizer plate 4390 degrees, a light filter plate 44, an LED lamp strip 5, a display article 6, polarized glasses 7 and a mainboard 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-7, the present invention provides a technical solution: the utility model provides a semi-permeable LCD polarisation glasses test screen show cupboard, includes the show cupboard body 1, is equipped with show shelf 3 in the show cupboard body 1, and the show cupboard body 1 is the cuboid structure, and backlight unit 2's shape and size keep unanimous with the cross-sectional size of the show cupboard body 1, and show shelf 3 is disc type structure, but its bottom connection drive arrangement makes show shelf 3 at the 1 internal rotation of the show cupboard body, and has placed show article 6 on this show shelf 3.
Be equipped with backlight unit 2 in this show cupboard body 1, backlight unit 2 is inner to be passed through inferior gram force board 26 fixed mounting at show cupboard body 1 the inner, be equipped with reflectance coating 25, light guide plate 24 on inferior gram force board 26's the outside in proper order, interior diffusion barrier 23, positive and negative exchange membrane 22 that adds lustre to and outer diffusion barrier 21, be equipped with LED lamp area 5 on the show cupboard body 1 of backlight unit 2 upper end, through the customs principle of being shaded, for liquid crystal module 4 provides the light source that can effectively reach a quantitative intensity.
The display cabinet body 1 is provided with a liquid crystal module 4 on the outer side, the liquid crystal module 4 comprises an acrylic plate outer frame 41, the acrylic plate outer frame 41 is fixedly arranged on the outer end surface of the display cabinet 1, a 90-degree polarizer 43, liquid crystal glass 42 and a filter plate 44 are sequentially arranged on the acrylic plate outer frame 41 from inside to outside, the liquid crystal module 4 is driven by a matched mainboard 8, the mainboard 8 is the prior common technology, the mainboard 8 comprises an image system 1080P or 720P, a picture system, a sound system, a power system, an SD card slot and reading system and a USB slot and reading system, the LCD imaging technology is that liquid crystal is arranged between two pieces of conductive glass, the electric field effect of liquid crystal molecule twisted nematic is caused by the driving of the electric field between two electrodes to control the light source transmission or shielding function, the light and shade are generated between the power supply switch to display the image, if a color filter is added, a color image can be displayed. The two glass substrates are provided with a pair of orthogonal polarizing films, so that liquid crystal can be aligned along the grooves, liquid crystal molecules become twisted because the grooves of the alignment films of the glass substrates deviate by 90 degrees, when no electric field is added to the glass substrates, light passes through the polarizing plates to be twisted by 90 degrees along with the liquid crystal, and the liquid crystal panel displays white through the lower polarizing plate; when an electric field is applied to the glass substrate, the liquid crystal molecules are aligned, light passes through the gaps of the liquid crystal molecules to maintain the original direction, the light is shielded by the polarizing plate below, the light is absorbed and cannot penetrate out, and the liquid crystal panel displays black. The LCD can achieve the display effect according to the voltage.
The using method comprises the following steps:
s1: selecting a positive polaroid negative plate, namely when the rear polaroid is 90 degrees, the angle of the front orthogonal polaroid is 0 degree, placing the display article 6 in the display cabinet 1 under the condition, and under the condition of not wearing polarizing glasses, a tester can see the display article 6 in the display cabinet 1, as shown in fig. 4;
s2: when the polarized glasses 7 are normally worn, the lens of the polarized glasses 7 serves as the filtering effect of the upper polarizer for 0 degree, and a tester can see the image displayed on the display cabinet of the semi-transparent LCD polarized glasses test screen and the display article 6 in the display cabinet body 1 by wearing the polarized glasses 7, as shown in FIG. 5;
s3: under the condition that the semi-transparent LCD polarized glasses test screen is electrified, the matched main board 8 drives the liquid crystal module 4 to play video images or pictures, and when a tester does not wear the polarized glasses 7, the tester cannot see the video images or pictures in the display cabinet body 1, as shown in FIG. 6;
s4: when the tester wears the polarized glasses 7 to be tested, the tester sees the video images or pictures displayed by the display cabinet 1, as shown in fig. 7.
The working principle is as follows: the structure of the invention is based on LCD display principle, uses the characteristic of filtering light of orthogonal polaroid to realize a simple and convenient product for the authenticity of the polarized glasses, when the polarized glasses 7 are sold, uses the display characteristic of the LCD screen to make a dynamic color image which enables a client to experience high quality under the condition that the upper polaroid is removed or the upper polarized light of the whole area is not reserved, and under the condition, uses the semi-transparent LCD screen to display the product, and provides high-quality client experience and anti-counterfeiting function for the LCD screen in the identification, use and popularization and display of the glasses industry.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a semi-transparent LCD polarisation glasses test screen show cupboard, includes the show cupboard body (1), its characterized in that: be equipped with show shelf (3) in the show cupboard body (1), be equipped with backlight unit (2) in this show cupboard body (1), backlight unit (2) are inner to be through ya keli board (26) fixed mounting in the show cupboard body (1) inner, be equipped with reflectance coating (25), light guide plate (24), interior diffusion barrier (23), positive and negative interchange membrane (22) and outer diffusion barrier (21) on the outside of ya keli board (26) in proper order, be equipped with LED lamp area (5) on the show cupboard body (1) of backlight unit (2) upper end, this show cupboard body (1) outside is equipped with liquid crystal module (4), liquid crystal module (4) include ya keli board frame (41), ya keli board frame (41) fixed mounting is on the outer terminal surface of show cupboard (1), and installs 90 degrees polaroid (43) from inside to outside on ya keli board frame (41) in proper order, Liquid crystal glass (42) and a filter plate (44), the liquid crystal module (4) being driven by a matching main board (8).
2. The display cabinet of the semi-transparent LCD polarized glasses test screen of claim 1, wherein: the display cabinet body (1) is of a cuboid structure, and the shape and size of the backlight module (2) are consistent with the cross-sectional size of the display cabinet body (1).
3. The display cabinet of the semi-transparent LCD polarized glasses test screen of claim 1, wherein: the showing stand (3) is of a disc-shaped structure, the bottom end of the showing stand can be connected with a driving device, so that the showing stand (3) rotates in the showing cabinet body (1), and the showing stand (3) is provided with showing articles (6).
4. The display cabinet of the semi-transparent LCD polarized glasses test screen of claim 1, wherein: the main board (8) comprises an image system 1080P or 720P, a picture system, a sound effect system, a power system, an SD card slot and reading system, a USB slot and reading system.
5. The display cabinet for the semi-transparent LCD polarized glasses test screen according to any one of claims 1-4, wherein the using method comprises:
s1: selecting a positive polaroid negative plate, namely when the rear polaroid is 90 degrees, the angle of the front orthogonal polaroid is 0 degree, placing the display article (6) in the display cabinet body (1) under the condition, and under the condition of not wearing polarized glasses, a tester can see the display article (6) in the display cabinet body (1);
s2: when the polarized glasses (7) are normally worn, the lens of the polarized glasses (7) serves as the filtering effect of the upper polarizer for 0 degree, and a tester can see images displayed on the display cabinet of the testing screen of the semi-transparent LCD polarized glasses and display articles (6) in the display cabinet body (1) through wearing the polarized glasses (7);
s3: under the condition that the semi-transparent LCD polarized glasses test screen is electrified, the matched main board (8) drives the liquid crystal module (4) to play video images or pictures, and when a tester does not wear the polarized glasses (7), the tester cannot see the video images or pictures in the display cabinet body (1);
s4: when the tester wears the polarized glasses (7) to be tested, the tester sees the video images or pictures displayed by the display cabinet body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710374877.0A CN108956094B (en) | 2017-05-24 | 2017-05-24 | Semi-transparent display cabinet for LCD polarized glasses test screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710374877.0A CN108956094B (en) | 2017-05-24 | 2017-05-24 | Semi-transparent display cabinet for LCD polarized glasses test screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108956094A CN108956094A (en) | 2018-12-07 |
| CN108956094B true CN108956094B (en) | 2021-05-11 |
Family
ID=64493821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710374877.0A Active CN108956094B (en) | 2017-05-24 | 2017-05-24 | Semi-transparent display cabinet for LCD polarized glasses test screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108956094B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102501462A (en) * | 2011-10-28 | 2012-06-20 | 陈美琴 | Polarization concealed image and preparing method thereof |
| CN102525191A (en) * | 2012-02-08 | 2012-07-04 | 苏州茂立光电科技有限公司 | Article showcase |
| CN203059069U (en) * | 2013-01-29 | 2013-07-17 | 崔泽新 | Display cabinet with transparent touch-sensitive screen |
| CN104280811A (en) * | 2014-11-04 | 2015-01-14 | 深圳市华星光电技术有限公司 | Polaroid, liquid crystal panel and liquid crystal display |
| TWI480530B (en) * | 2008-06-17 | 2015-04-11 | Nippon Electric Glass Co | Brightness non-uniformity evaluation method of glass substrates for a display and production method of glass substrates for a display substrates for a display |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1200390C (en) * | 2002-03-28 | 2005-05-04 | 财团法人工业技术研究院 | Phase difference type false proof method |
| CN201188053Y (en) * | 2007-12-21 | 2009-01-28 | 康博丽贸易(上海)有限公司 | Polarized light tester |
| KR101289656B1 (en) * | 2010-08-24 | 2013-07-25 | 엘지디스플레이 주식회사 | System for evaluating crosstalk of stereoscopic image display and method thereof |
| CN102122075A (en) * | 2010-11-30 | 2011-07-13 | 上海大学 | Estimation system and method based on inter-image mutual crosstalk in projection stereoscope visible area |
| US9052536B2 (en) * | 2011-05-10 | 2015-06-09 | Anthony, Inc. | Display case door with transparent LCD panel |
| CN102547366A (en) * | 2012-04-09 | 2012-07-04 | 四川长虹电器股份有限公司 | Polarizer detection method for polarized three-dimensional (3D) liquid crystal television |
-
2017
- 2017-05-24 CN CN201710374877.0A patent/CN108956094B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI480530B (en) * | 2008-06-17 | 2015-04-11 | Nippon Electric Glass Co | Brightness non-uniformity evaluation method of glass substrates for a display and production method of glass substrates for a display substrates for a display |
| CN102501462A (en) * | 2011-10-28 | 2012-06-20 | 陈美琴 | Polarization concealed image and preparing method thereof |
| CN102525191A (en) * | 2012-02-08 | 2012-07-04 | 苏州茂立光电科技有限公司 | Article showcase |
| CN203059069U (en) * | 2013-01-29 | 2013-07-17 | 崔泽新 | Display cabinet with transparent touch-sensitive screen |
| CN104280811A (en) * | 2014-11-04 | 2015-01-14 | 深圳市华星光电技术有限公司 | Polaroid, liquid crystal panel and liquid crystal display |
Non-Patent Citations (2)
| Title |
|---|
| 偏振眼镜立体显示的立体串扰度及其影响因素;潘冬冬等;《光学技术》;20090715;517-518 * |
| 立体投影质量的评价方法及系统;李艳等;《液晶与显示》;20120215;31-37 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108956094A (en) | 2018-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TW554219B (en) | Liquid crystal device | |
| CN202995195U (en) | Liquid crystal display device, special glasses and privacy display device | |
| TW200702843A (en) | Liquid crystal panel, liquid crystal television, and liquid crystal display device | |
| US10216034B2 (en) | Liquid crystal display device | |
| TWI480638B (en) | Hybrid type liquid crystal display device | |
| CN103376589A (en) | Display device | |
| TW200715008A (en) | Liquid crystal panel and liquid crystal display apparatus | |
| CN101916009B (en) | Smectic-state liquid crystal display | |
| US9671629B2 (en) | Display device and display system | |
| US20120133850A1 (en) | Device for generating encrypted images visible only through a polarizing filter and process for making the device | |
| CN103018955A (en) | Transparent display device, special glasses and display system | |
| WO2015096474A1 (en) | Display apparatus and display system | |
| CN100410761C (en) | Optical module for liquid crystal display and liquid crystal display | |
| KR101644518B1 (en) | Transparent display device and method for displaying using the same | |
| TW200512517A (en) | Display apparatus and viewing angle controlling unit | |
| CN108956094B (en) | Semi-transparent display cabinet for LCD polarized glasses test screen | |
| CN206848641U (en) | A kind of peep-proof display device | |
| CN207799278U (en) | One kind penetrating the two-sided interactive system of display | |
| CN206757237U (en) | A kind of LCD polaroid glasses test panel | |
| CN206849435U (en) | Semi-transparent LCD polaroid glasses test panel showcase | |
| KR101738002B1 (en) | Liquid crystal display | |
| CN208080973U (en) | The semi-transparent LCD polaroid glasses test panel showcase of curved surface | |
| CN112394565A (en) | Display device and display system | |
| CN211786506U (en) | Liquid crystal display cabinet with separated polaroid | |
| CN108957797A (en) | A kind of LCD polaroid glasses test panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |