2D-3D switchable display screen concave transparent material coating method, structure and conversion method

Abstract

The present invention discloses a method for coating a concave transparent material for a 2D-3D switchable display screen. The method comprises the following steps: step S1, coating a layer of PET material on a second ITO film; step S2, determining a vertical distance h1 from the lowest point to the top of the groove, and completing the coating; step S3, when the bottom end of an imprinting module contacts the surface of the PET material, the imprinting module imprints the PET material into a rectangular module, the size of the module being determined according to the visual area of ​​the corresponding TFT display screen; step S4, simultaneously providing a plurality of evenly arranged raised arc-shaped microstructures in the module, and the raised arc-shaped microstructures in the module being inclined at a certain angle, the angle being designed according to the pixel points of the TFT display screen, generally between 76° and 78°; step 5, forming a designed groove microstructure on the imprinted adhesive after imprinting; the structure of the 2D-3D switchable display screen reduces thickness, improves transmittance and clarity, and increases service life. At the same time, a conversion method for a 2D-3D switchable display screen realizes real-time switching between 2D and 3D display.

Description

Technical Field

[0001] The present invention relates to the technical field of display screens, and in particular to a method and structure for coating a concave transparent material on a 2D-3D switchable display screen. Background Art

[0002] Conventional slit-type gratings achieve 3D effects by sacrificing transmittance and resolution. By blocking and separating the light path for the left eye, the light path for the right eye enters the left eye, and the light path for the right eye enters the right eye, resulting in two patterns for the left and right eyes. These patterns are superimposed in the human brain to create a three-dimensional effect, synthesizing a 3D image with a sense of depth of field. It is precisely this obstruction that causes the overall image brightness to drop significantly (when 3D is turned on), with a brightness drop of approximately 56%. This drop is affected by the aperture ratio of the grating bars and the transmittance of the overall material. As a result, the module surface brightness is fine in normal 2D mode, but low when 3D mode is turned on. To match the characteristics of ordinary gratings, the original module's backlight brightness needs to be increased. As a result, conventional, general-purpose modules are not universally compatible with the addition of a 3D grating. At the same time, the increased brightness significantly affects the battery life and service life of the finished device, and the backlight life is also affected accordingly.

[0003] Liquid crystal grating technology, capable of 2D / 3D display conversion and boasting ultra-high transmittance, achieves 3D mode by only changing the resolution of the original TFT display module with virtually no change to its brightness. It utilizes the principle of light refraction to direct light to the left and right eyes, forming independent images and ultimately a three-dimensional image. Existing processing techniques have minimal effect on transmittance. While laminating the grating material reduces the overall thickness to some extent, it still cannot effectively address issues such as clarity and transmittance. Furthermore, the laminating process poses significant challenges to the film's material, processing precision, and adhesion, making it insufficient to meet the demands of modern society.

[0004] With the development of liquid crystal display technology, liquid crystal displays have been widely used in all aspects of life. People's requirements for naked-eye 3D display effects are also improving. For example, in application fields such as outdoor large-screen advertising machines, medical displays, enlightenment education, aviation simulation, and home appliance displays, perfect 3D display effects and applications that can freely switch between 2D are in urgent need of research and improvement. Summary of the Invention

[0005] In view of the above problems, the present invention aims to provide a method and structure for coating a concave transparent material on a 2D-3D switchable display screen, so as to solve the technical problems raised in the above background technology. To achieve the above purpose, the present invention provides the following technical solution - a method for coating a concave transparent material on a 2D-3D switchable display screen, comprising the following steps:

[0006] Step S1, coating a layer of PET material on the second ITO film;

[0007] Step S2, determining the vertical distance h1 from the lowest point to the top of the groove, and completing the coating;

[0008] Step S3, when the bottom end of the stamping module contacts the surface of the PET material, the stamping module stamps the PET material into a rectangular module, the size of the module being determined according to the visual area of ​​the corresponding TFT display screen;

[0009] In step S4, a plurality of evenly arranged raised arc-shaped microstructures are provided in the module, and the raised arc-shaped microstructures in the module are tilted at a certain angle, which is designed according to the pixel points of the TFT display screen, and is generally between 76-78 degrees;

[0010] Step 5: After embossing, a designed groove microstructure is formed on the embossed adhesive.

[0011] Preferably, the vertical distance h1 is calculated as follows:

[0012] Determine the incident angle of light on the groove surface as β, the exit angle as α, n1 and n2 are the refractive indices of PET material and liquid crystal respectively, calculate

[0013] According to the observation distance H and binocular distance D, calculate

[0014] The radius R of the groove is obtained from the lateral distance W of a single groove:

[0015] Finally, the vertical distance h1 from the lowest point to the vertex of the groove is calculated:

[0016]

[0017] Preferably, when no power is applied, the refractive index n2 of the liquid crystal is close to the refractive index n1 of the PET material, and no refractive spectrometry is generated when light passes through, thus forming a 2D effect; when power is applied, the refractive index n2 of the liquid crystal is greater than the refractive index n1 of the PET material, thus realizing left and right spectrometry and achieving a 3D effect.

[0018] Preferably, when the inclination angle of the groove is 77.17°, the display clarity is optimal.

[0019] A structure for coating a concave transparent material for a 2D-3D switchable display screen includes a TFT and a liquid crystal box. The TFT is composed of multiple rows of RGB pixels and is disposed below the liquid crystal box. The internal structure of the liquid crystal box includes: a first ITO film and a second ITO film disposed on the inner surface of glass, the first and second ITO films being sealed at both ends with frame glue, a first PI film disposed on the lower surface of the first ITO film, a concave transparent area being coated between the second ITO film and the second PI film, multiple liquid crystals disposed between the first and second PI films, and support columns disposed on the surfaces of the first and second PI films to control the spacing.

[0020] Preferably, the distance h2 between the first PI film and the second PI film does not exceed 20 μm, and the vertical distance h1 does not exceed 20 μm.

[0021] Preferably, the support column is arranged at the lowest point of the groove to ensure the stability of the internal structure when assembling the display screen.

[0022] Preferably, the refractive index of the PET material is 1.5, and the clarity of the displayed image is the highest.

[0023] Preferably, the width of a single groove is equal to the width of two RGB pixels in parallel, and the groove corresponds to the two RGB pixels one-to-one, so that the light sent by the two RGB pixels can pass through the single groove, thereby achieving complete light transmission and display effect.

[0024] A method for converting a 2D-3D switchable display screen comprises the following steps:

[0025] Step 1: Start the TFT, move the observer's eyes to the designated position, and keep the distance between the eyes and the liquid crystal box Hcm;

[0026] Step 2: If the ITO power supply is turned off, the liquid crystal in the liquid crystal cell is in a horizontal state, and the observer sees a 2D effect.

[0027] Step 3: If the ITO power supply is turned on, the liquid crystal in the liquid crystal cell is in a vertical state, and the observer sees a 3D effect;

[0028] Step 4: Repeat step 2 or step 3 to achieve the display effect of switching between 2D and 3D.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The present invention reduces the process deviation caused by the film lamination method. The coating process can not only reduce the process difficulty, but also directly use the ITO film attached to the glass as a substrate, which can effectively reduce the thickness and greatly improve the ghosting of 3D display. It also alleviates the problem that the mirror film of the conventional film lamination method needs a substrate to support it, resulting in its large thickness, thereby affecting the 3D display effect (such as ghosting).

[0031] 2. The coating method of this patent adjusts the groove of the concave area to 76-78°, ensuring the high stability, light transmittance and refraction of light entering. In addition, two pixels are combined in one groove, and the light emitted by the pixel can pass through the groove completely, which can not only ensure high brightness but also greatly improve the clarity of the display, avoiding ghosting and divergence.

[0032] 3. The present invention reduces the process of manufacturing liquid crystal boxes to a certain extent, and can greatly improve production quality and efficiency by reducing the problem of long process time caused by processes such as film lamination and substrate loading. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a 2D display structure diagram of the 2D-3D switchable display screen of the present invention.

[0034] Figure 2 This is a diagram of the 3D display structure of the present invention, which combines a 2D-3D switchable display screen with TFT.

[0035] Figure 3 This is a horizontal structural diagram of the groove of the 2D-3D switchable display screen of the present invention.

[0036] In the figure: 1. Glass; 2. First ITO film; 3. First PI film; 4. Liquid crystal; 5. Support column; 6. Frame glue; 7. Second PI film; 8. Concave transparent area; 9. Second ITO film; 10. Groove. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, detachably connected, or connected in one piece; they can be mechanically connected or electrically connected; they can be directly connected, or indirectly connected through an intermediate medium, or they can be internal connections between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following describes an embodiment of the present invention based on its overall structure.

[0039] The present invention provides a technical solution, see Figure 1 and Figure 3 : A method for coating a concave transparent material for a 2D-3D switchable display screen, comprising the following steps:

[0040] Step S1, coating a layer of PET material on the second ITO film;

[0041] Step S2, determining the vertical distance h1 from the lowest point to the top of the groove, and completing the coating;

[0042] Step S3, when the bottom end of the stamping module contacts the surface of the PET material, the stamping module stamps the PET material into a rectangular module, the size of the module being determined according to the visual area of ​​the corresponding TFT display screen;

[0043] In step S4, a plurality of evenly arranged raised arc-shaped microstructures are provided in the module, and the raised arc-shaped microstructures in the module are tilted at a certain angle, which is designed according to the pixel points of the TFT display screen, and is generally between 76-78 degrees;

[0044] Step 5: After embossing, a designed groove microstructure is formed on the embossed adhesive.

[0045] like Figure 2 As shown, the vertical distance h1 is calculated as:

[0046] Determine the incident angle of light on the groove surface as β, the exit angle as α, n1 and n2 are the refractive indices of PET material and liquid crystal respectively, calculate

[0047] According to the observation distance H and binocular distance D, calculate

[0048] The radius R of the groove is obtained from the lateral distance W of a single groove:

[0049] Finally, the vertical distance h1 from the lowest point to the vertex of the groove is calculated:

[0050]

[0051] Extensive data, combined with conventional viewing distances H and interocular distance D, indicates that optimal display clarity is achieved when vertical distance h1 does not exceed 20μm, distance h2 does not exceed 20μm, the refractive index of PET material is 1.5, and the grooves are tilted at an angle of 77.17°. These parameters vary depending on individual needs. The groove radius R, and, consequently, vertical distance h1, can be adjusted based on the current viewing distance H and interocular distance D. The groove tilt angle can also be adjusted based on the different TFT pixel arrangements.

[0052] like Figure 1As shown, a structure of a 2D-3D switchable display screen includes a TFT and a liquid crystal box. The TFT is composed of multiple rows of RGB pixels. The TFT is arranged below the liquid crystal box. The internal structure of the liquid crystal box includes: a first ITO film 2 and a second ITO film 9 are provided on the inner surface of a glass 1. The first ITO film 2 and the second ITO film 9 are sealed at both ends by a frame glue 6. A first PI film 3 is provided on the lower surface of the first ITO film 2. A concave transparent area 8 is coated between the second ITO film 9 and the second PI film 7. The distance h2 between the first PI film 3 and the second PI film 7 does not exceed 4μm. A plurality of liquid crystals 4 are provided between the first PI film 3 and the second PI film 7. At the same time, support columns 5 are provided on the surfaces of the first PI film 3 and the second PI film 7 to control the spacing. The support columns 5 are provided at the lowest point of the groove 10 to ensure the stability of the internal structure when assembling the display screen. The width of a single groove 10 is equal to the width of two RGB pixels in parallel. At the same time, the groove 10 corresponds to the two RGB pixels one-to-one, so that the light sent by the two RGB pixels can pass through the single groove 10, thereby achieving complete light transmission and display effect. Support columns 5 are used during the manufacturing process and are subsequently removed after the entire structure stabilizes. Their primary function is to prevent the assembled structure from shifting and stabilize the position of internal components such as the liquid crystal 4. The structure of the interchangeable display screen of the present invention is such that when power is off, the liquid crystal refractive index n2 is similar to the PET material refractive index n1, resulting in no refractive spectra when light passes through, creating a 2D effect. When power is on, the liquid crystal refractive index n2 is greater than the PET material refractive index n1, achieving left-right spectra and a 3D effect. This structure reduces the thickness of the liquid crystal cell by directly using the glass-attached ITO film as the substrate, effectively reducing thickness while improving light transmittance and significantly improving ghosting in 3D displays.

[0053] There are two display states: Figure 1 and Figure 2 As shown, a method for converting a 2D-3D switchable display screen includes the following steps:

[0054] Step 1: Start the TFT, move the observer's eyes to the designated position, and keep the distance between the eyes and the liquid crystal box Hcm;

[0055] Step 2: If the ITO power supply is turned off, the liquid crystal in the liquid crystal cell is in a horizontal state, and the observer sees a 2D effect.

[0056] Step 3: If the ITO power supply is turned on, the liquid crystal in the liquid crystal cell is in a vertical state, and the observer sees a 3D effect;

[0057] Step 4: Repeat step 2 or step 3 to achieve the display effect of switching between 2D and 3D.

[0058] The present invention can perfectly realize the free switching between 3D and 2D. It only needs to change the horizontal and numerical state of the liquid crystal. The pixels of the TFT can be mapped one-to-one with the grooves. According to the user's habits, the parameter values ​​of each part can be customized. Combined with the new coating process, groove arrangement, depth radius and other definitions of the present invention, it can not only ensure the free switching of display states, but also ensure high levels of clarity and display brightness, solving the technical problems of the existing technology such as large modules, low clarity, complex processes and the inability to switch display effects at will.

[0059] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure marks in the claims should not be regarded as limiting the claims involved.

Claims

1. A 2D-3D switchable display screen concave transparent material coating structure, characterized in that: include: The device comprises a TFT and a liquid crystal box, wherein the TFT is formed by arranging multiple rows of RGB pixels and is disposed below the liquid crystal box. The internal structure of the liquid crystal box comprises: a first ITO film and a second ITO film disposed on the inner surface of the glass, wherein the first and second ITO films are sealed at both ends with a frame adhesive, a first PI film is disposed on the lower surface of the first ITO film, a concave transparent area is coated between the second ITO film and the second PI film, a plurality of liquid crystals are disposed between the first and second PI films, and support columns are disposed on the surfaces of the first and second PI films to control the spacing; The width of a single groove is equal to the width of two RGB pixels in parallel. At the same time, the groove corresponds to the two RGB pixels one-to-one, so that the light sent by the two RGB pixels can pass through the single groove, thereby achieving complete light transmission and display effect; The method of making the structure comprises: Step S1, coating a layer of PET material on the second ITO film; Step S2, determining the vertical distance h1 from the lowest point to the top of the groove, and completing the coating; Step S3, when the bottom end of the stamping module contacts the surface of the PET material, the stamping module stamps the PET material into a rectangular module, the size of the module being determined according to the visual area of ​​the corresponding TFT display screen; In step S4, a plurality of evenly arranged raised arc-shaped microstructures are provided in the module, and the raised arc-shaped microstructures in the module are tilted at a certain angle, which is designed according to the pixel points of the TFT display screen and is between 76° and 78°. Step 5: After embossing, a designed groove microstructure is formed on the embossed adhesive.

2. The concave-transparent material coating structure for a 2D-3D switchable display screen according to claim 1, characterized in that: The vertical distance h1 is calculated as follows: Determine the incident angle of light onto the groove surface as , the angle of incidence is α, n1 and n2 are the refractive indices of PET material and liquid crystal respectively, calculate ; According to the observation distance H and binocular distance D, calculate 、 ; The radius R of the groove is obtained from the lateral distance W of a single groove: ; Finally, the vertical distance h1 from the lowest point to the vertex of the groove is calculated: 。 3. The 2D-3D switchable display screen concave transparent material coating structure according to claim 2, characterized in that: When no power is applied, the refractive index n2 of the liquid crystal is close to the refractive index n1 of the PET material, and no refraction or splitting occurs when light passes through, forming a 2D effect; when power is applied, the refractive index n2 of the liquid crystal is greater than the refractive index n1 of the PET material, realizing left and right splitting and achieving a 3D effect.

4. The 2D-3D switchable display screen concave transparent material coating structure according to claim 1, characterized in that: When the inclination angle of the grooves is arranged at 77.17°, the display clarity is optimal.

5. The concave-transparent material coating structure for a 2D-3D switchable display screen according to claim 1, wherein: The distance h2 between the first PI film and the second PI film does not exceed 20 μm, and the vertical distance h1 does not exceed 20 μm.

6. The concave-transmissive material coating structure for a 2D-3D switchable display screen according to claim 1, wherein: The support column is arranged at the lowest point of the groove to ensure the stability of the internal structure when assembling the display screen.

7. The concave-transparent material coating structure for a 2D-3D switchable display screen according to claim 1, wherein: The refractive index of the PET material is 1.5, and the clarity of the displayed image is the highest.

8. A method for converting a 2D-3D switchable display screen, characterized in that: The display screen includes the 2D-3D switchable display screen concave transparent material coating structure according to any one of claims 1 to 7, and the conversion method includes the following steps: Step 1: Start the TFT, move the observer's eyes to the designated position, and keep the distance between the eyes and the liquid crystal box Hcm; Step 2: If the ITO power supply is turned off, the liquid crystal in the liquid crystal cell is in a horizontal state, and the observer sees a 2D effect. Step 3: If the ITO power supply is turned on, the liquid crystal in the liquid crystal cell is in a vertical state, and the observer sees a 3D effect; Step 4: Repeat step 2 or step 3 to achieve the display effect of switching between 2D and 3D.

Images