Integrated movable capacitive touch reflective projection system

Abstract

The invention relates to the field of optics, in particular to projection equipment. An integrated movable capacitive touch reflective projection system comprises a projection support, a projection curtain and a projector, the projection curtain is fixed on the projection support, the projector is located above the projection curtain, and the projection direction faces forward; a reflecting mirror is arranged in front of the projector, and the mirror surface of the reflecting mirror faces the projection curtain; the projector and the reflecting mirror are matched in position and angle to form a light path system which is projected and imaged on the projection curtain; the teaching device further comprises a teaching blackboard, a support device is arranged on the teaching blackboard, and the projection support is arranged on the support device in a sliding mode. The projector is installed above the projection curtain at a high position, and the projector is matched with the reflecting mirror to form a light path system for projecting and imaging on the projection curtain, so that people are prevented from walking to block a light path, and the projection continuity is ensured.

Description

Technical Field

[0001] The present invention relates to the field of optics, and in particular to projection equipment. Background Art

[0002] With the development of the intelligent era, light and shadow display has become a development trend and has been used in more and more fields. For example, projection equipment is widely used in teaching.

[0003] In a classroom, a screen is usually placed in front of the blackboard, and a projector is placed on the same side as the students. The projector light is directly irradiated on the screen, forming an optical path system that projects the image onto the projection screen.

[0004] However, this projection method has the problem that when people move around, the light path is blocked, affecting the continuity of the projection. Summary of the Invention

[0005] An object of the present invention is to provide an integrated movable capacitive touch reflective projection system to solve at least one of the above technical problems.

[0006] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0007] An integrated movable capacitive touch reflective projection system includes a projection bracket, a projection screen, and a projector, wherein the projection screen is fixed to the projection bracket;

[0008] The projector is located above the projection screen, with the projection direction facing forward:

[0009] A reflector is arranged in front of the projector, with the mirror surface of the reflector facing the projection screen;

[0010] The projector and the reflector are matched in position and angle to form an optical path system for projecting an image onto a projection screen;

[0011] It also includes a teaching blackboard, where a bracket device is provided, and the projection bracket is slidably provided on the bracket device;

[0012] The projector is fixed above the projection bracket, and the reflector is fixed in front of the projector through the reflector bracket, thereby forming a linkage system in which the projector, the reflector, the projection bracket, and the projection screen slide synchronously.

[0013] In the above design, the projector and reflector are both installed at a high place to keep the ground passage completely unobstructed, without affecting the movement of people, ensuring the continuity of projection, and solving the problem of teacher shadow interference in traditional side projection. At the same time, the projector, reflector, projection bracket and projection screen slide synchronously to achieve seamless switching between projection teaching and blackboard writing. Teachers can freely choose digital demonstration or traditional blackboard writing according to teaching needs, solving the problem of projection blocking the blackboard during fixed installation. There is no need to readjust the angle after the projection bracket is moved, and it can be used immediately after it is turned on.

[0014] Further optimized, the projection screen includes a diffuse reflection imaging layer and a base layer, and a capacitive touch screen system is provided between the diffuse reflection imaging layer and the base layer;

[0015] The capacitive touch screen system includes a touch film;

[0016] The touch film has an isolation layer as a substrate, and two electrode arrays arranged on both sides of the isolation layer, namely a first electrode array and a second electrode array.

[0017] In the above design, a capacitive touch screen system is provided between the diffuse reflection imaging layer and the base layer to realize the touch screen function. Teachers or students can write, annotate, and drag courseware elements directly on the screen, which is easy to operate and improves classroom interactivity.

[0018] Further optimization further includes a flexible plastic substrate, wherein the flexible plastic substrate is bonded to the surface of the isolation layer;

[0019] A pointed discharge electrode is embedded in the flexible plastic substrate, and the pointed discharge electrode has a large end and a small end;

[0020] The small end of the pointed discharge electrode is located in the direction of the flexible plastic substrate away from the isolation layer;

[0021] The first electrode array includes a plurality of longitudinal electrode strips, on which block-shaped aluminum coatings are arranged at intervals, and the block-shaped aluminum coatings serve as longitudinal electrode units;

[0022] The second electrode array includes a plurality of latitudinal electrode strips, on which block-shaped aluminum coatings are arranged at intervals, and the block-shaped aluminum coatings serve as latitudinal electrode units;

[0023] The left and right sides of the longitudinal electrode unit are respectively provided with protrusions, which serve as longitudinal protrusions;

[0024] The left and right sides of the latitudinal electrode unit are respectively provided with protrusions, which serve as latitudinal protrusions;

[0025] The warp and weft protrusions are arranged alternately;

[0026] At least two pointed discharge electrodes are provided at the tail of one of the longitudinal protrusions, and the large ends of the pointed discharge electrodes are conductively connected to the longitudinal protrusion;

[0027] At least two pointed discharge electrodes are provided at the tail of one of the latitudinal protrusions, and the large ends of the pointed discharge electrodes are conductively connected to the latitudinal protrusions.

[0028] In the above design, the tip discharge electrode utilizes the tip effect (charges gather in areas with large curvature) to enhance the edge electric field distribution, enabling the capacitive touch screen system to detect slight capacitance changes when a finger or conductor approaches but does not directly contact, thereby achieving floating touch. The tip discharge electrode is conductively connected to the tails of the longitudinal and latitudinal protrusions, extending the sensing distance and forming a sensing area in the space between the longitudinal and latitudinal protrusions, thereby reducing the electric field blind spot.

[0029] Further optimized, the upper and lower sides of the longitudinal electrode unit are respectively provided with depressions, which serve as longitudinal depressions;

[0030] The upper and lower sides of the latitudinal electrode unit are respectively provided with depressions, which serve as latitudinal depressions;

[0031] The longitudinal electrode units and the latitudinal electrode units overlap at 90° in space, and the longitudinal protrusions overlap the latitudinal recesses.

[0032] In the above design, the overlap of the longitudinal protrusions and the latitudinal depressions can minimize the gaps and reduce the blind spots caused by touch, ensuring that information can be collected with every touch. At the same time, the complementary bite design of the longitudinal protrusions and the latitudinal depressions reduces the overall thickness fluctuation of the electrode layer and adapts to complex surfaces.

[0033] Further optimized, the pointed discharge electrode is a hollow structure.

[0034] In a further optimization, the diffuse reflection imaging layer is attached to a flexible plastic substrate, and the base layer is attached to an isolation layer.

[0035] In a further optimization, an anti-reflection film is attached to the side of the diffuse reflection imaging layer facing away from the flexible plastic substrate.

[0036] In the above design, an anti-reflection film is attached to the surface of the diffuse reflection imaging layer, and the interference effect of light is used to offset the reflected light, thereby significantly improving its anti-light gain effect.

[0037] The present invention installs both the projector and the reflector at a high place, keeps the ground passage completely unobstructed, does not affect the movement of people, and ensures the continuity of projection. The projector, reflector, projection bracket and projection screen slide synchronously to achieve seamless switching between projection teaching and blackboard writing. The tip discharge electrode uses the tip effect (charge accumulates in the area with large curvature) to enhance the edge electric field distribution, so that the capacitive touch screen system can detect the weak capacitance change when the finger or conductor approaches but does not directly contact, realizing non-contact floating touch. The tip discharge electrode is conductively connected to the tail of the longitudinal protrusion and the latitudinal protrusion, extending the sensing distance, so that the space area between the longitudinal protrusion and the latitudinal protrusion forms a sensing area, and reducing the electric field blind area. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive efforts. Among them:

[0039] Figure 1 It is a schematic diagram of the overall structure of the preferred embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of the flexible plastic substrate structure of the present invention;

[0041] Figure 3 It is a structural schematic diagram for reflecting the latitudinal depression of the present invention.

[0042] Figure numerals: 1. projection bracket; 2. projection screen; 201. diffuse reflection imaging layer; 202. base layer; 3. projector; 4. reflector; 5. teaching blackboard; 6. bracket device; 7. anti-reflection film; 8. isolation layer; 9. first electrode array; 10. second electrode array; 11. flexible plastic substrate; 12. pointed discharge electrode; 13. longitudinal protrusion; 14. latitudinal protrusion; 15. longitudinal depression; 16. latitudinal depression; 17. reflector bracket. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0044] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0045] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0046] Furthermore, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it necessarily refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0047] Reference Figure 1 As shown, the integrated movable capacitive touch reflective projection system of the preferred embodiment of the present invention includes a projection bracket 1, a projection screen 2 and a projector 3, wherein the projection screen 2 is fixed on the projection bracket 1;

[0048] The projector 3 is located above the projection screen 2, with the projection direction facing forward:

[0049] A reflector 4 is provided in front of the projector 3, and the mirror surface of the reflector 4 faces the projection screen 2;

[0050] The projector 3 and the reflector 4 are matched in position and angle to form an optical path system for projecting an image onto the projection screen 2;

[0051] It also includes a teaching blackboard 5, a bracket device 6 is provided at the teaching blackboard 5, and the projection bracket 1 is slidably provided on the bracket device 6;

[0052] The projector 3 is fixed above the projection bracket 1, and the reflector 4 is fixed in front of the projector 3 through the reflector bracket 17, thereby forming a linkage system in which the projector 3, the reflector 4, the projection bracket 1 and the projection screen 2 slide synchronously.

[0053] In this embodiment, the projection screen 2 and the projector 3 are fixed on the projection bracket 1, the reflector 4 is fixed on the reflector bracket 17, the projection bracket 1 is fixedly connected to the reflector bracket 17, and the projector 3 and the reflector 4 are both installed at a high place to keep the ground passage completely unobstructed, without affecting the movement of people, ensuring the continuity of projection, and solving the problem of teacher shadow interference during traditional side projection. In order to improve the movement stability of the reflector 4, the reflector bracket 17 is connected to the ceiling surface through a sliding rail. At the same time, the projector 3, the reflector 4, the projection bracket 1, the projection screen 2 and the reflector bracket 17 are an integrated structure that slides synchronously, realizing seamless switching between projection teaching and blackboard writing. Teachers can freely choose digital demonstration or traditional blackboard writing according to teaching needs, solving the problem of projection blocking the blackboard during fixed installation. There is no need to readjust the angle after the projection bracket 1 is moved, and it can be used immediately after it is turned on.

[0054] In order to prevent students from looking directly at the strong light of the projector 3, the first row of student seats needs to be located on the back side of the reflector 4.

[0055] Reference Figure 1 、 Figure 2 As shown, the projection screen 2 includes a diffuse reflection imaging layer 201 and a base layer 202, and a capacitive touch screen system is provided between the diffuse reflection imaging layer 201 and the base layer 202;

[0056] The capacitive touch screen system includes a touch film;

[0057] The touch film has an isolation layer 8 as a substrate, and two electrode arrays arranged on both sides of the isolation layer 8, namely a first electrode array 9 and a second electrode array 10.

[0058] In this embodiment, a capacitive touch screen system is provided between the diffuse reflection imaging layer 201 and the base layer 202 to realize the touch screen function. Teachers or students can write, annotate, and drag courseware elements directly on the screen, which is easy to operate and improves classroom interactivity.

[0059] Reference Figure 2 、 Figure 3 As shown, it also includes a flexible plastic substrate 11, which is bonded to the surface of the isolation layer 8;

[0060] A pointed discharge electrode 12 is embedded in the flexible plastic substrate 11, and the pointed discharge electrode 12 has a large end and a small end;

[0061] The small end of the pointed discharge electrode 12 is located in the direction of the flexible plastic substrate 11 away from the isolation layer 8;

[0062] The first electrode array 9 includes a plurality of longitudinal electrode strips, on which block-shaped aluminum coatings are arranged at intervals, and the block-shaped aluminum coatings serve as longitudinal electrode units;

[0063] The second electrode array 10 includes a plurality of latitudinal electrode strips, on which block-shaped aluminum coatings are arranged at intervals. The block-shaped aluminum coatings serve as latitudinal electrode units.

[0064] The left and right sides of the longitudinal electrode unit are respectively provided with protrusions, which serve as longitudinal protrusions 13;

[0065] The left and right sides of the latitudinal electrode unit are respectively provided with protrusions, which serve as latitudinal protrusions 14;

[0066] The warp protrusions 13 and the weft protrusions 14 are arranged alternately;

[0067] At least two pointed discharge electrodes 12 are provided at the tail of a longitudinal protrusion 13 , and the large ends of the pointed discharge electrodes 12 are conductively connected to the longitudinal protrusion 13 ;

[0068] At least two pointed discharge electrodes 12 are provided at the tail of a latitudinal protrusion 14 , and the large ends of the pointed discharge electrodes 12 are conductively connected to the latitudinal protrusion 14 .

[0069] In this embodiment, the tip discharge electrode 12 utilizes the tip effect (charge accumulation in areas with large curvature) to enhance the edge electric field distribution, enabling the capacitive touch screen system to detect slight capacitance changes when a finger or conductor approaches but does not directly contact, thereby achieving floating touch. The tip discharge electrode 12 is conductively connected to the tails of the longitudinal protrusions 13 and the latitudinal protrusions 14, extending the sensing distance and forming a sensing area in the space between the longitudinal protrusions 13 and the latitudinal protrusions 14, thereby reducing the electric field blind spot.

[0070] Reference Figure 3 As shown, recesses are provided on the upper and lower sides of the longitudinal electrode unit, serving as longitudinal recesses 15;

[0071] The upper and lower sides of the latitudinal electrode unit are respectively provided with depressions, which serve as latitudinal depressions 16;

[0072] The longitudinal electrode units and the latitudinal electrode units overlap at 90° in space, and the longitudinal protrusions 13 are superimposed on the latitudinal recesses 16 .

[0073] In this embodiment, the overlap of the longitudinal protrusions 13 and the latitudinal recesses 16 can minimize the gaps and reduce the blind spots generated during touch, ensuring that information can be collected with every touch. At the same time, the complementary bite design of the longitudinal protrusions 13 and the latitudinal recesses 16 reduces the overall thickness fluctuation of the electrode layer and adapts to complex surfaces.

[0074] Reference Figure 2 As shown, the tip discharge electrode 12 is a hollow structure.

[0075] Reference Figure 2 As shown, the diffuse reflection imaging layer 201 is attached to the flexible plastic substrate 11 , and the base layer 202 is attached to the isolation layer 8 .

[0076] Reference Figure 2 As shown, an anti-reflection film 7 is attached to the side of the diffuse reflection imaging layer 201 facing away from the flexible plastic substrate 11 .

[0077] In this embodiment, an anti-reflection film 7 is attached to the surface of the diffuse reflection imaging layer 201 to offset the reflected light by utilizing the interference effect of light, thereby significantly improving the anti-light gain effect.

[0078] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An integrated movable capacitive touch reflective projection system, comprising a projection stand, a projection screen, and a projector, wherein the projection screen is fixed to the projection stand, and is characterized by: The projector is located above the projection screen, with the projection direction facing forward; A reflector is arranged in front of the projector, with the mirror surface of the reflector facing the projection screen; The projector and the reflector are matched in position and angle to form an optical path system for projecting an image onto a projection screen; It also includes a teaching blackboard, where a bracket device is provided, and the projection bracket is slidably provided on the bracket device; The projector is fixed above the projection bracket, and the reflector is fixed in front of the projector through the reflector bracket, thereby forming a linkage system in which the projector, the reflector, the projection bracket, and the projection screen slide synchronously.

2. The integrated movable capacitive touch reflective projection system according to claim 1, characterized in that: The projection screen comprises a diffuse reflection imaging layer and a base layer, wherein a capacitive touch screen system is provided between the diffuse reflection imaging layer and the base layer; The capacitive touch screen system includes a touch film; The touch film has an isolation layer as a substrate, and two electrode arrays arranged on both sides of the isolation layer, namely a first electrode array and a second electrode array.

3. The integrated movable capacitive touch reflective projection system according to claim 2, characterized in that: It also includes a flexible plastic substrate, which is bonded to the surface of the isolation layer; A pointed discharge electrode is embedded in the flexible plastic substrate, and the pointed discharge electrode has a large end and a small end; The small end of the pointed discharge electrode is located in the direction of the flexible plastic substrate away from the isolation layer; The first electrode array includes a plurality of longitudinal electrode strips, on which block-shaped aluminum coatings are arranged at intervals, and the block-shaped aluminum coatings serve as longitudinal electrode units; The second electrode array includes a plurality of latitudinal electrode strips, on which block-shaped aluminum coatings are arranged at intervals, and the block-shaped aluminum coatings serve as latitudinal electrode units; The left and right sides of the longitudinal electrode unit are respectively provided with protrusions, which serve as longitudinal protrusions; The left and right sides of the latitudinal electrode unit are respectively provided with protrusions, which serve as latitudinal protrusions; The warp and weft protrusions are arranged alternately; At least two pointed discharge electrodes are provided at the tail of one of the longitudinal protrusions, and the large ends of the pointed discharge electrodes are conductively connected to the longitudinal protrusion; At least two pointed discharge electrodes are provided at the tail of one of the latitudinal protrusions, and the large ends of the pointed discharge electrodes are conductively connected to the latitudinal protrusions.

4. The integrated movable capacitive touch reflective projection system according to claim 3, characterized in that: The upper and lower sides of the longitudinal electrode unit are respectively provided with depressions, which serve as longitudinal depressions; The upper and lower sides of the latitudinal electrode unit are respectively provided with depressions, which serve as latitudinal depressions; The longitudinal electrode units and the latitudinal electrode units overlap at 90° in space, and the longitudinal protrusions overlap the latitudinal recesses.

5. The integrated movable capacitive touch reflective projection system according to claim 4, characterized in that: The pointed discharge electrode is a hollow structure.

6. The integrated movable capacitive touch reflective projection system according to claim 3, characterized in that: The diffuse reflection imaging layer is laminated on the flexible plastic substrate, and the base layer is laminated on the isolation layer.

7. The integrated movable capacitive touch reflective projection system according to claim 3, characterized in that: An anti-reflection film is attached to the side of the diffuse reflection imaging layer facing away from the flexible plastic substrate.

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