CN114509910B - Rear-projection type touch display screen and projection system - Google Patents
Rear-projection type touch display screen and projection system Download PDFInfo
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- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
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- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
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Abstract
The invention relates to a rear-projection type touch display screen and a projection system, and belongs to the technical field of projection display. The rear projection type touch display screen comprises a projection layer, a touch layer, a substrate layer and a display layer which are sequentially stacked, wherein: the substrate layer is used for supporting the projection layer, the touch control layer and the display layer; the projection layer comprises a diffusion particle layer and a first microprism layer which are arranged in a stacked manner, and the first microprism layer is arranged between the diffusion particle layer and the touch control layer; the diffusion particle layer is used for receiving the light projected by the back projection equipment and performing diffusion treatment on the received light; the first microprism layer is used for converging the light passing through the diffusion particle layer; the touch control layer is used for collecting touch signals and transmitting light received by the projection layer to the substrate layer; the display layer comprises a particle condensing layer, and the particle condensing layer is used for condensing light passing through the substrate layer. The invention can make the touch display screen thin and borderless, and is suitable for large-size touch display equipment.
Description
Technical Field
The invention relates to the technical field of projection display, in particular to a rear-projection touch display screen and a projection system.
Background
The commercial display and education large screen in the market at present basically adopts a whole machine which is realized by adding a touch function based on a TFT-LCD (thin film transistor liquid crystal display) module.
In the related art, the touch function realized based on the capacitive touch screen scheme is subject to the problems of screen size, lamination yield and the like because of the need of fully laminating the TFT-LCD liquid crystal glass, so that the cost is high, and the touch function is difficult to be widely applied to large-size touch display equipment. The infrared touch scheme is characterized in that the infrared touch screen is required to be provided with grooves, and infrared light bars (infrared emitting tubes and infrared receiving tubes are arranged on the four sides of the screen) are required to be installed on the four sides of the screen, so that the frame is large, the whole touch screen is thicker and heavier, and is greatly influenced by strong light, and the infrared touch scheme is also not suitable for large-size touch display equipment.
Through the technical analysis, the existing touch display screen implementation scheme has the defect that the large-size touch display equipment is difficult to popularize.
Disclosure of Invention
In order to solve the defect that the conventional touch display screen implementation scheme is difficult to reach large-size touch display equipment, the invention provides a rear-projection touch display screen and a projection system.
In order to solve the above technical problems, the present invention provides a rear-projection type touch display screen, including a projection layer, a touch layer, a substrate layer and a display layer, which are sequentially stacked, wherein:
The substrate layer is used for supporting the projection layer, the touch layer and the display layer;
The projection layer comprises a diffusion particle layer and a first microprism layer which are arranged in a stacked manner, and the first microprism layer is arranged between the diffusion particle layer and the touch control layer; the diffusion particle layer is used for receiving light projected by the back projection equipment and performing diffusion treatment on the received light; the first microprism layer is used for converging the light passing through the diffusion particle layer;
The touch control layer is used for collecting touch signals and transmitting light received by the projection layer to the substrate layer;
The display layer comprises a particle light-gathering layer, and the particle light-gathering layer is used for gathering light passing through the substrate layer.
The beneficial effects of the invention are as follows: the touch display screen manufactured by laminating the display layer, the substrate layer, the touch layer and the projection layer with the structure can realize the thinning, ultra-narrow frame or borderless formation of the touch display screen by utilizing the back projection to display images and using the touch layer to acquire touch signals, has low cost, high light transmittance and large visual angle, and can be popularized to large-size touch projection display equipment.
Further, the touch layer comprises a first conductive layer, an insulating layer and a second conductive layer which are sequentially stacked, the first conductive layer is arranged between the substrate layer and the insulating layer, and the second conductive layer is arranged between the projection layer and the insulating layer.
The beneficial effects of adopting above-mentioned improvement scheme are: the touch control layer constructed based on the conductive layer and the insulating layer has simple structure and low manufacturing cost, and can realize ultra-narrow frame or frameless touch control display screen, thereby ensuring that the rear projection type touch control display screen has good front display and front touch control effects.
Further, the touch layer further comprises a protective layer, and the protective layer is arranged between the second conductive layer and the projection layer.
The beneficial effects of adopting above-mentioned improvement scheme are: the protective layer is arranged to protect each component of the touch control layer.
Further, the first microprism layer includes a plurality of microprisms extending in a horizontal direction.
The beneficial effects of adopting above-mentioned improvement scheme are: the first microprism layer with the structure can effectively improve the light illuminance and further improve the display effect of the rear-projection touch display screen.
Further, the display layer further comprises a shadow eliminating layer, and the shadow eliminating layer is arranged on one side of the particle light condensing layer, which is away from the substrate layer.
The beneficial effects of adopting above-mentioned improvement scheme are: the particle light-gathering layer gathers light and improves light illuminance, and the shadow-eliminating layer is utilized to improve influence loss of natural light and reflected light on projection illuminance, so that the front display effect of the rear-projection touch display screen is improved.
Further, the shadow eliminating layer is an oxynitride composite layer.
The beneficial effects of adopting above-mentioned improvement scheme are: the oxynitride composite layer has good transmission and reflection increasing performance, so that the influence of natural light and reflected light on the illumination of projection light is effectively improved.
Further, the particle light condensation layer comprises a second microprism layer and a nano silver particle layer which are sequentially stacked, and the second microprism layer is arranged between the substrate layer and the nano silver particle layer.
The beneficial effects of adopting above-mentioned improvement scheme are: and the second microprism layer and the nano silver particle layer are utilized to construct the particle condensing layer, so that the structure is simple and easy to realize.
Further, the second microprism layer includes a plurality of microprisms extending in a vertical direction.
The beneficial effects of adopting above-mentioned improvement scheme are: the second microprism layer with the structure can further improve the light illuminance and the display effect of the rear-projection touch display screen
Further, the substrate layer is made of toughened glass or organic glass.
The beneficial effects of adopting above-mentioned improvement scheme are: the toughened glass or the organic glass can provide good supporting effect for the rear-projection type touch display screen, and can ensure the picture display effect of the rear-projection type touch display screen.
In a second aspect, the present invention provides a projection system, including a rear projection device and the rear projection touch display screen of the first aspect, wherein:
The back projection device is used for projecting an image to be displayed to the back projection type touch display screen;
the rear-projection type touch control display screen is used for displaying an image to be displayed and collecting touch signals;
The rear projection device is also configured to respond to the touch signal.
Drawings
Fig. 1 is a schematic structural diagram of a rear-projection touch display screen according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a projection system according to an embodiment of the present invention;
Fig. 3 is a schematic structural diagram of a projection system according to another embodiment of the present invention.
Detailed Description
The following examples are further illustrative and supplementary of the present invention and are not intended to limit the invention in any way.
A rear-projection-based touch display screen according to an embodiment of the present invention is described below with reference to the accompanying drawings.
Referring to fig. 1, the present invention provides a rear projection type touch display screen, which includes a projection layer 10, a touch layer 20, a substrate layer 30 and a display layer 40 that are sequentially stacked;
a substrate layer 30 for supporting the projection layer 10, the touch layer 20, and the display layer 40;
The projection layer 10 includes a diffusion particle layer 101 and a first microprism layer 102 which are stacked, and the first microprism layer 102 is disposed between the diffusion particle layer 101 and the touch layer 20; the diffusion particle layer 101 is configured to receive light projected by the back projection device and perform diffusion processing on the received light; the first microprism layer 102 is used for converging the light passing through the diffusion particle layer 101;
The touch control layer 20 is used for collecting touch signals and transmitting light received by the projection layer 10 to the substrate layer 30;
The display layer 40 includes a particle condensing layer 401, and the particle condensing layer 401 is used for condensing light passing through the substrate layer 30.
It should be noted that, the projection devices may be divided into a forward projection device and a backward projection device according to a projection manner, where the backward projection device refers to a projection device installed behind a screen, that is, the backward projection device and a viewer are respectively located at two sides of the screen, and at this time, light emitted by the backward projection device is directly emitted to the screen from one side of the screen and is transmitted to the viewer at the other side of the screen through the screen.
In this embodiment, the rear-projection type touch display screen is formed by stacking the projection layer 10, the touch layer 20, the substrate layer 30 and the display layer 40, and the light projected by the rear-projection device behind the rear-projection type touch display screen is received by the diffusion particle layer 101 in the projection layer 10 and subjected to diffusion treatment, then transmitted to the first microprism layer 102 for convergence treatment, and sequentially transmitted through the touch layer 20 and the substrate layer 30, the touch signal is collected by the touch layer 20 in real time, and the front display of the projection screen is completed by the display layer 40 based on the light input into the rear-projection type touch display screen, so that a touch display structure capable of having both a rear-projection display function and a front-touch function is obtained.
The particle light-condensing layer 401 in the display layer 40 has a micro-prism layer structure and a particle layer structure, the micro-prism layer structure is used for refracting light, reducing the diffusion angle of the light, converging the light, and the particle layer structure has high light-transmitting property, reduces the reflection at the interface of the layer structure, and is beneficial to the light passing through.
The diffusion particle layer 101 in the projection layer 10 is a layer formed of diffusion particles (for example, silica particles, calcium carbonate particles, titanium dioxide particles, or the like), and may be formed by fixing solvent-type UV gel on a pre-prepared substrate by a coating process, and mixing and curing the mixture by oven drying and high-pressure mercury lamp ultraviolet radiation.
As a possible implementation manner, the touch signal may be a pressure signal generated when the user located right in front of the rear-projection touch display screen, that is, on one side of the display layer 40 presses the touch display screen, and because the display screen is generated based on the rear projection, the projection device may be placed in a darkroom behind the screen, so that the influence of ambient light on the projection light can be effectively reduced, and the touch operation of the user located on the front of the screen does not affect the front display of the projection screen, so that the user experience can be effectively improved.
Optionally, in one embodiment, as shown in fig. 1, the touch layer 20 includes a first conductive layer 201, an insulating layer 202, and a second conductive layer 203 that are sequentially stacked, where the first conductive layer 201 is disposed between the substrate layer 30 and the insulating layer 202, and the second conductive layer 203 is disposed between the projection layer 10 and the insulating layer 202.
In this embodiment, the insulating layer 202 is a transparent insulating layer, for example, a transparent insulating layer made of a silicon nitride film is selected, a conductive material is fixed on two sides of the insulating layer 202 by a coating method, and the conductive material is processed by a yellow light system Cheng Gongyi to form a first conductive layer 201 and a second conductive layer 203 in a grid shape, wherein the first conductive layer 201 and the second conductive layer 203 are made of transparent conductive materials so as not to block light, and the conductive materials can be a nano silver film, an ITO film, a graphene conductive material, a carbon nanotube conductive material, or the like.
As a possible implementation manner, the touch layer 20 is divided into an edge area and a touch area, where the edge area is a mapping of a BM area of the rear-projection touch display screen (an area where a black edge of a screen edge is located) to a plane where the touch layer 20 is located, and the touch area is a mapping of an AA area of the rear-projection touch display screen (an area where a display screen in the middle of the screen is located) to a plane where the touch layer 20 is located, and the touch area is covered by the touch layer 20, and a sensor is disposed at a position between the first conductive layer 201 and the second conductive layer 203 and belongs to the edge area, and is used for processing a pressure signal collected by the touch layer 20 when a user presses the touch area, so as to determine a touch position.
Optionally, the touch layer 20 further includes a protective layer 204, where the protective layer 204 is disposed between the second conductive layer 203 and the projection layer 10.
The protective layer 204 may be an organic polymer such as a thermoplastic polymer, a thermosetting polymer, a UV-curable polymer, or an inorganic substance such as silica, for protecting the touch layer 20 from being damaged, and improving the service life of the touch layer 20.
Optionally, the first microprism layer 102 comprises a plurality of microprisms extending in a horizontal direction.
The horizontal microprism layer is formed by arranging a plurality of microprisms in a horizontal direction, wherein the microprisms are formed by embossing, spraying and other processes. The diffusion particle layer 101 can diffuse a point light source or a line light source into a uniform surface light source, and can improve light extraction efficiency and light extraction uniformity. The plurality of microprisms of the first microprism layer 102 are arranged along the horizontal direction, and the diffusion angle of the light is reduced by refracting the light, so that the light is converged, the light energy utilization rate parallel to the propagation direction of the light is improved, and the light illuminance is improved.
In this embodiment, the arrows shown with reference to fig. 1 are light rays emitted from the rear projection device, and the first microprism layer 102 is selected as a horizontal microprism layer. The light projected by the back projection equipment is received by the diffusion particle layer 101, so that the projection angle of the light entering the back projection type touch display screen is increased through diffusion, the light passing through the diffusion particle layer 101 is converged by the horizontal microprism layer, and the light illuminance is improved, so that the display effect is improved.
Optionally, the display layer 40 further includes a shadow eliminating layer 402, where the shadow eliminating layer 402 is disposed on a side of the particle light collecting layer 401 opposite to the substrate layer 30.
In this embodiment, the shadow eliminating layer 402 and the particle light collecting layer 401 are laminated on the substrate layer 30, wherein the particle light collecting layer 401 is used for collecting light and raising illuminance so as to reduce illuminance loss when the light passes through the touch control layer 20 and the substrate layer 30; the anti-shadow layer 402 is arranged on the outermost layer of the front surface of the rear-projection type touch display screen, has the characteristics of increasing transmission and reducing reflection, and can greatly improve the influence loss of natural light and reflected light on the illumination of the projection light, thereby improving the front display effect of the rear-projection type touch display screen.
Optionally, the shadow layer 20 is an oxynitride composite layer.
In this embodiment, the shadow eliminating layer 20 (oxynitride composite layer) in this embodiment may be freely provided in a single-layer structure or a multi-layer structure, which is not limited herein. When the shadow layer 20 has a single-layer structure, it may be formed of at least one material selected from a silicon oxynitride material, a silicon oxide material, a silicon nitride material, and a niobium oxide material, or may be formed of silicon oxynitride, or a mixture of phosphorus pentoxide and silicon dioxide.
When the shadow eliminating layer 20 has a composite layer structure, a two-layer structure formed of a niobium pentoxide material and a silicon dioxide material may be used, or a three-layer structure formed of a niobium pentoxide material, a silicon dioxide material, a silicon oxynitride material, or the like may be used. It is understood that the number of structural layers and specific materials of the oxynitride composite layer can be freely set according to actual needs.
Optionally, the particulate condensing layer 401 includes a second micro prism layer 4011 and a nano silver particulate layer 4012 that are sequentially stacked, and the second micro prism layer 4011 is disposed between the substrate layer 30 and the nano silver particulate layer 4012.
In this embodiment, the nano silver particle layer 4012 gathers the detailed light paths formed by diffusing the light, and transmits the gathered light to the second micro prism layer 4011, and the second micro prism layer 4011 increases the illuminance of the light and transmits the light to the shadow eliminating layer 402. The second microprism layer 4011 is a vertical microprism layer, and includes a plurality of microprisms extending in a vertical direction, and may be formed by imprinting, spraying, and the like. The second microprism layer 4011 is used for refracting light, reducing the diffusion angle of the light, converging the light, and the nano silver particle layer 4012 has high light transmission property, reduces the reflection at the interface of the layer structure, and is beneficial to the light passing through.
Optionally, in one embodiment, the material of the substrate layer 30 is toughened glass or organic glass.
In this embodiment, the substrate layer 30 is a supporting component of the rear-projection touch display screen, and is also a film-coated carrier of the display layer 40, the touch layer 20 and the projection layer 10, and may be made of transparent materials, for example, AG anti-dazzle tempered glass or optical materials such as PMMA and PET, and the thickness of the substrate layer 30 may be made of 1-10 mm. The size of the substrate layer 30 may be set according to the actual projection requirement, and the shape of the substrate layer 30 may be set according to the actual projection requirement.
As shown in fig. 2, a projection system provided in an embodiment of the present invention includes a rear projection device 1 and a rear projection type touch display screen 2 as described above, wherein:
The rear projection device 1 is used for projecting an image to be displayed on the rear projection type touch display screen 2;
a rear projection type touch display screen 2 for displaying an image to be displayed and collecting a touch signal;
the rear projection device 1 is also arranged to respond to touch signals.
In this embodiment, the back projection device 1 may be an ultrashort-focus projection device or a medium-focus projection device, and is disposed on the back of the rear-projection touch display screen 2 in a hanging manner, and the user uses functions such as touch display and writing on the front of the rear-projection touch display screen 2, so that the light path of the projection device is not blocked, and the projection system has great experience advantages on application scenes such as commercial display experience, front touch control and writing teaching blackboard.
Illustratively, when a user touches a display area of the rear-projection touch display screen 2, the rear-projection touch display screen 2 collects and transmits a touch signal generated at a touch position to the rear-projection apparatus 1, and the rear-projection apparatus 1 responds to the touch signal. For example, the touch display screen 2 acquires a touch signal indicating that the display screen is turned off and transmits to the rear projection apparatus 1, and the rear projection apparatus 1 then stops projecting the screen in response to the touch signal.
Optionally, in one embodiment, as shown in fig. 3, the method further includes: an interaction device 3 and a cloud server 4;
The interaction equipment 3 is used for collecting voice instructions of a user;
The cloud server 4 is used for generating a control instruction according to a voice instruction of a user; the rear projection device 1 is also arranged to respond to control commands.
The interaction device 3 comprises intelligent hardware interaction components such as a camera component, an array microphone component, a loudspeaker component and the like, the interaction device 3 can be used as one peripheral device or a plurality of peripheral devices to coexist, the interaction device 3 can be used for carrying out data exchange through wired and wireless link transmission, and the intelligent hardware interaction device has the functions of integrated beam forming, sound orientation, noise suppression, voice wakeup, voice recognition, semantic understanding and the like so as to realize intelligent voice interaction.
In this embodiment, the interaction device 3 performs far-field pickup by using a built-in array microphone, and compresses pickup data to be transmitted to a main board DSP of the back projection device 1 to generate voice data, the voice data is uploaded to the cloud server 4, a voice algorithm set in the cloud server 4 performs semantic recognition, semantic generalization, voice synthesis (or ASR parsing and converting into text characters) on the voice data, and generates a control instruction to control the back projection device 1, for example, play control, projection display control, control of a projection function, scene control, conference transfer, music and mass entertainment content on demand, so as to achieve far-field voice control effect and interaction, and improve user experience.
The rear-projection touch display screen and the projection system provided by the embodiments can be manufactured to be 1-10 mm in thickness, can realize thinning of the touch display screen, ultra-narrow frames or borderless, have the advantages of being high in overall screen occupation ratio, small in joint gaps under spliced screen scenes and the like, have good display and touch effects, can be widely applied to large-size touch display application scenes, can realize intelligent interaction through external interaction equipment, and improve use experience.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (7)
1. The utility model provides a rear-projection type touch-control display screen which characterized in that, including projection layer, touch-control layer, substrate layer and the display layer of laminating the setting in proper order, wherein:
The substrate layer is used for supporting the projection layer, the touch layer and the display layer;
The projection layer comprises a diffusion particle layer and a first microprism layer which are arranged in a stacked manner, and the first microprism layer is arranged between the diffusion particle layer and the touch control layer; the diffusion particle layer is used for receiving light projected by the back projection equipment and performing diffusion treatment on the received light; the first microprism layer is used for converging the light passing through the diffusion particle layer;
The touch control layer is used for collecting touch signals and transmitting light received by the projection layer to the substrate layer;
The display layer comprises a particle light-gathering layer, the particle light-gathering layer is used for gathering light passing through the substrate layer, the particle light-gathering layer comprises a second microprism layer and a nano silver particle layer which are sequentially stacked, and the second microprism layer is arranged between the substrate layer and the nano silver particle layer;
the touch control layer comprises a first conductive layer, an insulating layer and a second conductive layer which are sequentially stacked, wherein the first conductive layer is arranged between the substrate layer and the insulating layer, and the second conductive layer is arranged between the projection layer and the insulating layer;
The display layer further comprises a shadow eliminating layer, the shadow eliminating layer is arranged on one side of the particle light gathering layer, which is back to the substrate layer, the shadow eliminating layer and the particle light gathering layer are plated on the substrate layer in a laminated mode, and the shadow eliminating layer is arranged on the outermost layer of the front face of the rear-projection touch display screen.
2. A rear projection touch display screen as recited in claim 1, wherein the touch layer further comprises a protective layer disposed between the second conductive layer and the projection layer.
3. A rear projection touch display screen as recited in claim 1, wherein the first microprism layer comprises a plurality of microprisms extending in a horizontal direction.
4. A rear projection touch display screen as recited in claim 1, wherein the shadow eliminating layer is a oxynitride composite layer.
5. A rear projection touch display screen as recited in claim 4, wherein the second microprism layer comprises a plurality of microprisms extending in a vertical direction.
6. A rear projection touch display screen as recited in any of claims 1-5, wherein the substrate layer is made of tempered glass or plexiglass.
7. A projection system comprising a rear projection device and the rear projection touch display screen of any of claims 1 to 6, wherein:
the back projection device is used for projecting an image to be displayed to the rear projection type touch display screen;
the rear projection type touch display screen is used for displaying the image to be displayed and collecting touch signals;
the back projection device is further configured to respond to the touch signal.
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| CN113325660A (en) * | 2020-02-28 | 2021-08-31 | 深圳光峰科技股份有限公司 | Transparent projection screen and method of manufacturing the same |
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