Touch projection screen

Abstract

The utility model relates to the technical field of projection, in particular to a touch projection screen. The touch projection screen comprises a screen main body, and the screen main body comprises a surface scratch-resistant layer, a Fresnel structure layer, a light absorption layer, a diffusion layer, a nano-silver touch layer and a substrate layer which are stacked in sequence; the control module comprises a wireless transmitting module, a touch control module and a power supply module; a charging interface is formed in the screen main body, and the control module is integrally arranged below the surface of the screen main body and electrically connected with the nano-silver touch layer; the touch control module receives capacitance change signals of the nano-silver touch control layer and transmits the capacitance change signals to a projector through the wireless transmitting module. According to the touch projection screen, the nano-silver touch layer and the control module are arranged on the projection screen, so that touch interaction of the projection screen is realized on the basis of projection display.

Description

Technical Field

[0001] The utility model relates to the technical field of projection, in particular to a touch-controlled projection screen. Background Art

[0002] Common large-size LCD displays are expensive. Due to the active display, the strong blue light directly enters the eyes. Long-term viewing will cause damage to the human eye. As another way to display large-size displays, projection display filters out most of the harmful blue light through reflection imaging. It is also cheap and gradually accepted by people. However, on the one hand, the display effect of traditional projection screens is greatly affected by ambient light; on the other hand, traditional projection screens are only used for reflection imaging and can only display images, which cannot meet the interactive needs of intelligent devices.

[0003] At present, infrared touch has been introduced into projection screens to achieve human-computer interaction of projection screens; however, the touch sensing accuracy of infrared touch is low and the effect is poor. At the same time, the infrared touch frame is limited by the size of the infrared LED lamp, and the frame is thick and framed, which is not conducive to the thinness of the projection screen. Capacitive touch is used in some studies. Usually, a capacitive sensing layer is set on the surface of the projection screen to ensure touch sensitivity, but the capacitive sensing layer set on the surface will affect the optical display effect of the projection screen.

[0004] Therefore, it is necessary to provide a projection screen with better display effect and interactive experience. Utility Model Content

[0005] The utility model provides a touch projection screen, which is used to solve the problems of poor display effect and interaction experience of existing projection screens.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A touch projection screen, comprising:

[0008] A screen body, the screen body comprising a surface anti-scratch layer, a Fresnel structure layer, a light absorption layer, a diffusion layer, a nano-silver touch layer and a base layer stacked in sequence;

[0009] A control module, the control module comprising a wireless transmission module, a touch control module and a power supply module;

[0010] The screen body is provided with a charging interface, and the control module is integrated and arranged below the surface of the screen body and is electrically connected to the nano-silver touch layer;

[0011] The touch control module receives the capacitance change signal of the nano-silver touch layer and transmits it to the projector through the wireless sending module.

[0012] In some embodiments, the base layer is one of KT board, organic glass, PC board, and plastic board; the thickness of the base layer is 5mm-10mm, for example, 5mm, 8mm, and 10mm.

[0013] In some embodiments, the nanosilver touch layer is a nanosilver conductive layer; the thickness of the nanosilver touch layer is 250 μm-500 μm, for example, 250 μm, 400 μm, or 500 μm.

[0014] In some embodiments, the nanosilver conductive layer includes a plurality of sensing electrode lines and a plurality of driving electrode lines, the sensing electrode lines are electrically connected to the sensing electrode FPC through sensing electrode leads, and the driving electrode lines are electrically connected to the driving electrode FPC through driving electrode leads.

[0015] In some embodiments, the materials of the diffusion layer, the light absorption layer, the Fresnel structure layer, and the surface anti-scratch layer are respectively polymer resins; the thickness of the diffusion layer is 5μm-20μm, for example, it can be 5μm, 8μm, 15μm, and 20μm; the thickness of the light absorption layer is 5μm-20μm, for example, it can be 5μm, 8μm, 15μm, and 20μm; the maximum thickness of the Fresnel structure layer is 7μm-15μm, for example, it can be 7μm, 10μm, and 15μmμm; the thickness of the surface anti-scratch layer is 250μm-550μm, for example, it can be 250μm, 300μm, and 550μm.

[0016] In some embodiments, the wireless transmission module includes one of a wifi module, a zigbee module, and a bluetooth module.

[0017] In some embodiments, the power supply module includes one of an AC power supply module, a DC power supply module, and a DC power supply battery module.

[0018] In some of the embodiments, a protective frame is further provided around the screen body, and the control module and the charging port are respectively provided on the protective frame.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] (1) The touch projection screen of the utility model is provided with a nanosilver touch layer and a control module on the projection screen. The touch control module receives the capacitance change signal of the nanosilver touch layer and transmits it to the projector through the wireless transmission module. After receiving the signal, the projector adjusts the picture and re-images it on the projection screen. The touch projection screen of the utility model is used to realize the touch interaction of the projection screen on the basis of projection display; by arranging the nanosilver touch layer inside the optical film, the ambient light directly reaches the optical film, thereby preventing the nanosilver touch layer from affecting the optical imaging and ensuring the projection display effect.

[0021] (2) The touch projection screen of the utility model is reasonably designed, with a simple and stable structure and strong practicality. The surface of the projection screen is flat and has a flat effect similar to that of an LCD TV. It is suitable for both long-focus and short-focus projectors, and the brightness and contrast of the projected image are increased, thereby improving the projection effect. After the touch projection screen of the utility model is wirelessly paired with the projector, writing and touching can be performed directly on the projected image without the need for other input methods. Compared with traditional large-size all-in-one LCD machines, it provides the same display and writing effects, and greatly reduces costs and power consumption, thereby protecting the eyesight of viewers, and is suitable for promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the top view of the touch projection screen of the utility model;

[0024] Figure 2 This is a schematic diagram of the back structure of the touch projection screen of the utility model;

[0025] Figure 3 It is a schematic diagram of a projection system of a touch-controlled projection screen and a projector according to the present invention.

[0026] Among them: 1-surface anti-scratch layer, 2-Fresnel structure layer, 3-light absorption layer, 4-diffusion layer, 5-nanosilver touch layer, 6-base layer, 7-wireless transmission module, 8-touch control module, 9-power module, 10-projection touch display area, 11-charging interface, 12-touch projection screen, 13-projector. DETAILED DESCRIPTION

[0027] The following will be combined with specific embodiments to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the utility model.

[0028] like Figure 1-3 As shown, a touch projection screen 12 comprises: a screen body, the screen body comprises a surface anti-scratch layer 1, a Fresnel structure layer 2, a light absorbing layer 3, a diffusion layer 4, a nano-silver touch layer 5 and a base layer 6 which are stacked in sequence; a control module, the control module comprises a wireless transmission module 7, a touch control module 8 and a power module 9; a charging interface 11 is arranged on the screen body, the control module is integrated and arranged below the surface of the screen body, and is electrically connected to the nano-silver touch layer 5; the touch control module 8 receives the capacitance change signal of the nano-silver touch layer 5 and transmits it to the projector 13 through the wireless transmission module 7. Among them, the surface anti-scratch layer 1 increases the hardness of the screen surface to 2H, which can prevent slight punctures or scratches; the light absorbing layer 3 can reduce the dark state brightness and increase the contrast to more than 10 times; the diffusion layer 4 can expand the left and right viewing angles to 120 degrees; the Fresnel structure layer 2 combined with the light absorbing layer 3 and the diffusion layer 4 can absorb ambient light (up, left, right), thereby converging the light of the projector 13 to the middle, increasing the central brightness, and ensuring the display effect. By arranging a nano-silver touch layer 5 and a control module on the touch projection screen 12, touch interaction between the projection screen and the projector 13 is realized on the basis of projection display; and after it is wirelessly paired and connected with the projector 13, when a finger or a capacitive pen touches the projection screen, the nano-silver capacitive touch layer separated by the surface anti-scratch layer and the Fresnel structure layer can sense the change in surface capacitance, and transmit the surface coordinates to the projector 13 through the touch control module 8 and the wireless transmission module 7 to realize writing and touching directly on the projection screen of the projection screen, without the need for other input methods, and having the same display and writing effects as traditional large-size liquid crystal integrated machines; the wireless transmission module 7 in the control module arranges the nano-silver touch layer 5 at the bottom of the diffusion layer 4, that is, the nano-silver touch layer 5 is arranged inside the optical film, and the ambient light directly reaches the optical film, thereby preventing the nano-silver touch layer 5 from affecting the optical imaging and ensuring the projection display effect.

[0029] Specifically, the base layer 6 is one of KT board, organic glass, PC board, and plastic board, and the thickness of the base layer 6 is 5mm-10mm, preferably 5mm. The nanosilver touch layer 5 is a nanosilver conductive layer, and the thickness of the nanosilver touch layer 5 is 250μm-500μm, preferably 500μm. The materials of the diffusion layer 4, the light absorption layer 3, the Fresnel structure layer 2, and the surface anti-scratch layer 1 are respectively polymer resins; the thickness of the diffusion layer 4 is 5μm-20μm, preferably 15μm; the thickness of the light absorption layer 3 is 5μm-20μmμm, preferably 8μm; the maximum thickness of the Fresnel structure layer 2 is 7μm-15μm, preferably 15μm; the thickness of the surface anti-scratch layer 1 is 250μm-550μm, preferably 250μm. By setting the surface anti-scratch layer 1, the Fresnel structure layer 2, the light absorption layer 3, the diffusion layer 4, and the base layer 6 as organic structure layers, and the nano-silver touch layer 5 as a nano-silver coating, that is, each functional layer of the projection screen has a certain flexibility, so that the mechanical strength of the screen can be improved and the weight of the screen can be reduced. By limiting the thickness of each functional layer, the thickness of the projection screen can be controlled to obtain a thinner projection screen; and by reducing the thickness of each functional layer, the touch sensor can be made more sensitive, thereby obtaining a better touch experience.

[0030] Specifically, the nanosilver conductive layer includes a plurality of sensing electrode lines and a plurality of driving electrode lines, the sensing electrode lines are electrically connected to the sensing electrode FPC through the sensing electrode leads, and the driving electrode lines are electrically connected to the driving electrode FPC through the driving electrode leads (not shown in the figure). Through the above design, the sensing circuit and the driving circuit can be obtained on a single layer of nanosilver conductive layer at the same time, thereby reducing the number of conductive layers and reducing the thickness of the projection screen; and the nanosilver conductive layer can directly use the base layer or diffusion layer of the resin material as the coating film material, so there is no need to use a separate film material, further reducing the thickness of the projection screen.

[0031] Specifically, the wireless transmission module 7 includes one of a wifi module, a zigbee module, and a bluetooth module. The power module 9 includes one of an AC power supply module, a DC power supply module, and a DC power supply battery module. By integrating a wifi module, a zigbee module, or a bluetooth module on the touch projection screen 12, the wireless connection between the projection screen and the projector 13 and the touch feedback of the projection screen to the projector 13 can be realized, thereby improving the convenience of using the projection device. The power module 9 is used to drive the touch sensor and wireless connection of the projection screen, and the charging interface 11 is used to charge the power module.

[0032] Specifically, a protective frame is provided around the screen body, and the control module and the charging interface 11 are respectively provided on the protective frame. By directly providing the control module and the charging interface 11 on the protective frame, the screen body will not be blocked, so that the entire screen body can display images well and implement touch feedback. The control module and the charging interface 11 can also be directly provided on the back of the touch projection screen 12, that is, on the side of the base layer 6 away from the nanosilver touch layer.

[0033] The working process of the utility model is as follows: first, the control modules of the projector 13 and the touch projection screen 12 are started, and the wireless sending module 7 in the control module is wirelessly paired with the projector 13, and the image in the projector 13 is displayed on the touch projection screen 12 by reflection imaging; then the touch calibration software built into the touch control module 8 interacts with the projector 13 through the wireless sending module 7, and the software calibrates the touch position, specifically, touching the upper left, upper right, lower left, and lower right of the projection screen according to the prompts. At this time, the nano silver touch layer 5 of the touch projection screen 12 will feel the change in capacitance and transmit the specific touch position to the touch control module 8, and the touch control module 8 transmits the touch signal to the wireless sending module 7, and the wireless sending module 7 transmits the touch signal to the projector 13. The projector 13 receives the signal to complete the touch calibration, and the matching and superposition of the projection screen and the touch range are achieved, which is the projection touch display area 10 of the touch projection screen 12. Subsequently, the surface of the projection touch display area 10 is directly touched, and the touch signal continues to be transmitted to the projector 13. After receiving the signal, the projector 13 performs the corresponding operation, adjusts the display image, and displays a new image on the touch projection screen 12, that is, the touch interaction between the person and the touch projection screen 12 and the projector 13 is completed, thereby realizing the dual functions of display and touch of the projection screen. The mouse image is projected at the touch position and the corresponding operation is performed to adjust the display image and mouse operation. The single-point touch projection screen 12 realizes the left mouse button function, and the double-point touch projection screen 12 realizes the right mouse button function, thereby realizing the dual functions of display and touch of the projection screen. It should be noted that the touch projection screen 12 of the present invention essentially only has projection display, touch sensing and signal transmission functions. The above-mentioned touch feedback effect is actually achieved by the touch projection screen 12 receiving the touch signal and transmitting it to the projector 13. After the projector 13 receives the signal, it adjusts the projection picture itself and presents it on the touch projection screen by way of reflection imaging. That is, the realization of the touch function of the touch projection screen 12 of the present application needs to cooperate with the projector 13, specifically, it needs to cooperate with the feedback program set in the projector 13. For example, when demonstrating PPT, after the projector 13 and the touch projection screen 12 are wirelessly connected through the wireless sending module 7, the mouse control program will be started inside the projector 13, and the mouse screen will be projected and displayed in the projection touch display area 10 of the touch projection screen 12. At this time, you only need to use touch instead of the mouse to touch the marked position of the projection screen, select the corresponding PPT page and touch it. When the PPT is being shown, a single touch of the projection screen 12 is similar to clicking the left mouse button to realize the page turning function. Touching the projection screen 12 twice in a row is similar to clicking the right mouse button to exit the projection mode.

[0034] Similarly, the realization of the writing function of the touch projection screen 12 also requires the cooperation of the corresponding APP software in the projector 13. Specifically, after opening the writing and painting APP, when a straight line is touched on the projection screen of the touch projection screen 12, that is, when writing is performed, the touch control module 8 will send the coordinates of the points on this straight line to the projector 13 in real time through the wireless sending module 7 in the order of touch. After receiving the coordinates, the projector 13 transmits these position data to the APP. After receiving the position information, the APP draws a straight line and transmits it back to the projector for imaging, and then displays it in the projection screen of the touch projection screen 12, thereby realizing the writing function.

[0035] The present invention is further described above with the aid of specific embodiments. However, it should be understood that the specific description here should not be construed as limiting the essence and scope of the present invention. Various modifications made to the above embodiments by ordinary technicians in the field after reading this specification are all within the scope of protection of the present invention.

Claims

1. A touch projection screen, characterized in that: include: A screen body, the screen body comprising a surface anti-scratch layer, a Fresnel structure layer, a light absorption layer, a diffusion layer, a nano-silver touch layer and a base layer stacked in sequence; A control module, the control module comprising a wireless transmission module, a touch control module and a power supply module; The screen body is provided with a charging interface, and the control module is integrated and arranged below the surface of the screen body and is electrically connected to the nano-silver touch layer; The touch control module receives the capacitance change signal of the nano-silver touch layer and transmits it to the projector through the wireless sending module.

2. The touch projection screen according to claim 1, characterized in that: The base layer is one of KT board, organic glass, PC board and plastic board; the thickness of the base layer is 5mm-10mm.

3. The touch projection screen according to claim 1, characterized in that: The nano-silver touch layer is a nano-silver conductive layer; the thickness of the nano-silver touch layer is 250 μm-500 μm.

4. The touch projection screen according to claim 3, characterized in that: The nano silver conductive layer includes a plurality of sensing electrode lines and a plurality of driving electrode lines. The sensing electrode lines are electrically connected to the sensing electrode FPC through sensing electrode leads, and the driving electrode lines are electrically connected to the driving electrode FPC through driving electrode leads.

5. The touch projection screen according to claim 1, characterized in that: The materials of the diffusion layer, light absorption layer, Fresnel structure layer and surface anti-scratch layer are respectively polymer resins; the thickness of the diffusion layer is 5μm-20μm; the thickness of the light absorption layer is 5μm-20μm; the maximum thickness of the Fresnel structure layer is 7μm-15μm; the thickness of the surface anti-scratch layer is 250μm-550μm.

6. The touch projection screen according to claim 1, characterized in that: The wireless transmission module includes one of a wifi module, a zigbee module and a bluetooth module.

7. The touch projection screen according to claim 1, characterized in that: The power supply module includes one of an AC power supply module, a DC power supply module, and a DC power supply battery module.

8. The touch projection screen according to claim 1, characterized in that: The screen body is also surrounded by a protective frame, and the control module and the charging interface are respectively arranged on the protective frame.

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