TWI722363B - Touch projection screen and touch projection system - Google Patents

Abstract

A touch projection screen and a touch projection system are provided. The touch projection screen includes a first substrate, a diffuse reflection layer and a first electrode layer. The diffuse reflection layer and the first electrode layer are disposed on the first substrate. The first electrode layer is overlapped with the diffuse reflection layer, and the first electrode layer is in contact with the first substrate.

Description

Touch projection screen and touch projection system

The present invention relates to a projection screen and a projection system, and more particularly to a touch projection screen and a touch projection system.

The existing interactive projection device mainly uses a photographic module to intercept objects moving in front of the projection screen, and then cooperates with the calculation of the computing module to realize the human-computer interaction function. Due to the need to purchase additional camera modules and other components, the cost of the interactive projection device cannot be effectively reduced. In addition, some technologies propose to attach the multilayer conductive substrate of the touch element to the back of the conventional projection screen to provide the touch function. However, each layer of conductive substrate needs to be precisely aligned, which not only affects the manufacturing time but also the yield. Accordingly, researchers in the field are eager to develop an interactive projection device that can balance cost, manufacturing time, and yield.

The invention provides a touch projection screen and a touch projection system, which can give consideration to cost, manufacturing time and yield.

The touch projection screen of the present invention includes a first substrate, a diffuse reflection layer, and a first electrode layer. The diffuse reflection layer and the first electrode layer are disposed on the first substrate. The first electrode layer overlaps with the diffuse reflection layer, and the first electrode layer is in contact with the first substrate.

In an embodiment of the present invention, the first electrode layer and the diffuse reflection layer are respectively disposed on two opposite surfaces of the first substrate.

In an embodiment of the present invention, the first electrode layer and the diffuse reflection layer are stacked on the same surface of the first substrate.

In an embodiment of the present invention, the touch projection screen further includes a second electrode layer. The first electrode layer and the second electrode layer are respectively arranged on two opposite surfaces of the first substrate, and the diffuse reflection layer is arranged on the first electrode layer or the second electrode layer.

In an embodiment of the present invention, the touch projection screen further includes a second electrode layer and an insulating layer. The first electrode layer, the insulating layer and the second electrode layer are sequentially arranged on the first substrate. The diffuse reflection layer and the first electrode layer are respectively disposed on two opposite surfaces of the first substrate, or the diffuse reflection layer is disposed on the second electrode layer.

In an embodiment of the present invention, the touch projection screen further includes a second substrate, a second electrode layer, and a non-conductive adhesive layer. The second electrode layer is disposed on the second substrate. The second substrate is attached to the first substrate through the non-conductive adhesive layer.

In an embodiment of the present invention, the first electrode layer and the diffuse reflection layer are respectively disposed on two opposite surfaces of the first substrate. The first electrode layer, the non-conductive adhesive layer and the second electrode layer are located between the first substrate and the second substrate.

In an embodiment of the present invention, the first electrode layer and the diffuse reflection layer are respectively disposed on two opposite surfaces of the first substrate. The second substrate, the second electrode layer, the non-conductive adhesive layer and the first substrate are located between the diffuse reflection layer and the first electrode layer.

In an embodiment of the present invention, the first electrode layer and the diffuse reflection layer are stacked on the same surface of the first substrate. The first electrode layer, the first substrate, the non-conductive adhesive layer and the second electrode layer are located between the diffuse reflection layer and the second substrate.

In an embodiment of the present invention, the touch projection screen is a flexible touch projection screen or a rollable touch projection screen.

A touch projection system of the present invention includes the above touch projection screen and a projection device. The projection device is suitable for providing an image beam. The image beam illuminates the diffuse reflection layer.

Based on the above, in the touch projection screen and the touch projection system of the embodiments of the present invention, the electrode layer is provided to detect the change in capacitance, so as to realize the touch function. Therefore, the touch projection system does not require additional camera modules and other components to achieve human-computer interaction. In addition, since at least one electrode layer (such as the first electrode layer) required for touch control is directly formed on the substrate (such as the first substrate) provided with a diffuse reflection layer, the number of alignments can be effectively reduced, or even the number of alignments can be omitted. , Which helps to shorten manufacturing time and improve yield. Therefore, the touch projection screen and the touch projection system of the embodiments of the present invention can take into account cost, manufacturing time, and yield.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

The directional terms mentioned in the embodiments, for example: "up", "down", "front", "rear", "left", "right", etc., are only directions with reference to the drawings. Therefore, the directional terms used are used to illustrate, but not to limit the present invention.

In addition, the terms "first" and "second" mentioned in this specification or the scope of the patent application are only used to name discrete elements or to distinguish different embodiments or ranges, and are not used to limit the number of elements. The upper limit or lower limit is not used to limit the manufacturing order or the arrangement order of the components.

1 to 9 are schematic diagrams of the touch projection system according to the first embodiment to the ninth embodiment of the present invention, respectively. In the drawings, each drawing depicts the general features of methods, structures, and/or materials used in specific exemplary embodiments. However, these drawings should not be construed as defining or limiting the scope or nature covered by these exemplary embodiments. For example, for clarity, the relative thickness and position of each layer, region, and/or structure may be reduced or enlarged. In addition, in FIGS. 1 to 9, the same or similar elements will use the same or similar reference numerals, and redundant descriptions thereof will be omitted. In addition, the features in different exemplary embodiments can be combined without conflict, and simple equivalent changes and modifications made in accordance with this specification or the scope of the patent application still fall within the scope of this patent.

Please refer to FIG. 1, the touch projection system 1 of the first embodiment includes a touch projection screen 10 and a projection device 11. The projection device 11 can adopt any existing projection device, and the details are omitted here. The projection device 11 is suitable for providing an image beam B. The image beam B irradiates the touch projection screen 10 to form an image.

The touch projection screen 10 includes a first substrate 100, a diffuse reflection layer 101 and a first electrode layer 102. In detail, the first substrate 100 is suitable for carrying the diffuse reflection layer 101 and the first electrode layer 102. For example, the first substrate 100 may be a glass substrate or a plastic substrate, but it is not limited thereto.

According to different requirements, the first substrate 100 may be a rigid substrate, a flexible substrate or a rollable substrate. For a flexible substrate or a rollable substrate, the first substrate 100 may be a thin glass substrate or a plastic substrate.

Since the first substrate 100 is located behind the diffuse reflection layer 101 (viewed from the transmission direction of the image beam B) rather than in front of the diffuse reflection layer 101, the image formed on the diffuse reflection layer 101 is not affected by the first substrate 100 The influence of penetration rate. Accordingly, the first substrate 100 may be light-transmissive or opaque.

The first substrate 100 has a first surface S1 and a second surface S2. The first surface S1 and the second surface S2 are opposite to each other. In this embodiment, the first surface S1 is located between the second surface S2 and the projection device 11. That is, the first surface S1 is the surface of the first substrate 100 facing the projection device 11, and the second surface S2 is the surface of the first substrate 100 facing away from the projection device 11. According to different requirements, the first surface S1 can be a flat surface, a curved surface, or a combination of the above two surfaces. The curved surface may be convex or concave. Similarly, the second surface S2 can also be a flat surface, a curved surface, or a combination of the above two surfaces.

The diffuse reflection layer 101 is provided on the first substrate 100. In this embodiment, the diffuse reflection layer 101 is disposed on the surface (first surface S1) of the first substrate 100 facing the projection device 11, so that the image beam B from the projection device 11 irradiates the diffuse reflection layer 101 of the touch projection screen 10. .

The diffuse reflection layer 101 is suitable for transmitting the image beam B irradiating it in multiple directions (rather than a single direction), so that glare/high-intensity reflected light can be avoided in a single direction. For example, the diffuse reflection layer 101 is a white diffuse reflection layer, but not limited to this. The diffuse reflection layer 101 at least covers the range irradiated by the image beam B (ie, the projection range).

The first electrode layer 102 is provided on the first substrate 100. In this embodiment, the first electrode layer 102 is disposed on the second surface S2 of the first substrate 100. In other words, the diffuse reflection layer 101 and the first electrode layer 102 are respectively disposed on two opposite surfaces of the first substrate 100 (ie, the first surface S1 and the second surface S2).

The first electrode layer 102 is suitable for providing a touch function. The touch function may be a self-capacitance (self capacitance) or a mutual capacitance (mutual capacitance) touch function. For general human-computer interaction, the user touches the image projected on the projection screen within the projection range or performs a floating touch in front of the image to activate the function corresponding to the image (such as open window, close window , Switch windows and draw lines, etc.). Therefore, the first electrode layer 102 that provides the touch function is at least disposed within the projection range. In other words, the first electrode layer 102 overlaps with the diffuse reflection layer 101.

The first electrode layer 102 may include a plurality of electrodes (not shown) and a plurality of wires (not shown). Each electrode is electrically connected with at least one wire for signal transmission. The shape of each electrode, the relative arrangement relationship of these electrodes, and the relative arrangement relationship between these electrodes and these wires can be changed according to requirements, and existing pattern designs and layout methods can be adopted, and the details are omitted here.

Since the first electrode layer 102 is located behind the diffuse reflection layer 101 (viewed from the transmission direction of the image beam B) rather than in front of the diffuse reflection layer 101, the image formed on the diffuse reflection layer 101 is not affected by the first electrode layer. 102's penetration rate. Accordingly, the first electrode layer 102 may be transparent, opaque, or partially transparent and partially opaque. The light-transmitting conductive material may include metal oxide, silver nanowire, silver paste, and graphene, but not limited to this. The opaque conductive material may include metal or alloy. In addition, the metal can be formed into a mesh metal through a patterning process to have a light-transmitting effect.

In this embodiment, the diffuse reflection layer 101 is directly formed on the first surface S1 of the first substrate 100 by coating, so the diffuse reflection layer 101 is in contact with the first surface S1 of the first substrate 100 (that is, the diffuse reflection layer 101 is in contact with the first surface S1 of the first substrate 100). There is no adhesive layer between 101 and the first substrate 100). On the other hand, the first electrode layer 102 is directly formed on the second surface S2 of the first substrate 100 by a printing method or a coating process combined with a patterning process. Therefore, the first electrode layer 102 and the second substrate 100 are directly formed on the second surface S2. The surface S2 is in contact (that is, there is no adhesive layer between the first electrode layer 102 and the first substrate 100). However, the manufacturing method of the diffuse reflection layer 101 and the first electrode layer 102 can be changed according to requirements, and is not limited to the above.

In the case where the first electrode layer 102 needs to use a high temperature process, if the diffuse reflection layer 101 is not resistant to high temperatures, the first electrode layer 102 can be formed first, and then the diffuse reflection layer 101 can be formed to ensure that the diffuse reflection layer 101 in the final product Quality (completeness). In other words, the production sequence of the above-mentioned film layers can be adjusted to improve the yield of the touch projection screen 10.

By setting the electrode layer (such as the first electrode layer 102) to detect the capacitance change, the touch function can be realized. Therefore, the touch projection system 1 does not require additional camera modules and other components to realize the human-computer interaction function. In addition, since the electrode layer (such as the first electrode layer 102) required for touch control is directly formed on the substrate (such as the first substrate 100) provided with the diffuse reflection layer 101, the alignment step can be omitted, which helps Shorten manufacturing time and improve yield. Therefore, the touch projection screen 10 and the touch projection system 1 can balance cost, manufacturing time, and yield.

According to different requirements, the touch projection screen 10 may further include other elements or layers. For example, the touch projection screen 10 may further include a protective layer 103. The protective layer 103 is disposed on the first electrode layer 102 and covers the first electrode layer 102 to provide anti-scratch and anti-oxidation effects. For example, the material of the protective layer 103 may include silicon oxide or silicon nitride, but is not limited to this.

In addition, the touch projection screen 10 may also further include a storage device 104. In detail, the touch projection screen 10 is, for example, a rollable touch projection screen. When the touch projection system 1 is not used, the aforementioned stack structure (including the first substrate 100, the diffuse reflection layer 101, the first electrode layer 102, and the protective layer 103) can be rolled into a roll and stored in the storage device 104. In one embodiment, the touch projection screen 10 may be a flexible touch projection screen, and the touch projection screen 10 may be folded or stored in other ways. In another embodiment, the touch projection screen 10 may be a fixed touch projection screen. The fixed touch projection screen itself is neither rollable nor flexible. In addition, the fixed touch projection screen can be a flat projection screen, a curved projection screen, or a combination of flat and curved projection screens. The following embodiments can all be improved with this, and will not be repeated below.

Please refer to FIG. 2, the main differences between the touch projection system 1A of the second embodiment and the touch projection system 1 of FIG. 1 are as follows. In the touch projection system 1A, the touch projection screen 10A further includes a second electrode layer 105 and an insulating layer 106. The first electrode layer 102, the insulating layer 106, and the second electrode layer 105 are sequentially disposed on the first substrate 100, and the first electrode layer 102 and the second electrode layer 105 are electrically insulated from each other through the insulating layer 106. In addition, the protective layer 103 is disposed on the second electrode layer 105 and covers the second electrode layer 105 to provide anti-scratch and anti-oxidation effects.

The first electrode layer 102 and the second electrode layer 105 include a plurality of electrodes (not shown) and a plurality of wires (not shown). Each electrode is electrically connected with at least one wire for signal transmission. The shape of each electrode, the relative arrangement relationship of these electrodes, and the relative arrangement relationship between these electrodes and these wires can be changed according to requirements, and existing pattern designs and layout methods can be adopted, and the details are omitted here.

Since the second electrode layer 105 is located behind the diffuse reflection layer 101 (viewed from the transmission direction of the image beam B) rather than in front of the diffuse reflection layer 101, the image formed on the diffuse reflection layer 101 is not affected by the second electrode layer. The impact of the penetration rate of 105. Accordingly, the second electrode layer 105 may be light-transmissive, opaque, or partially transparent and partially opaque. For light-transmitting and non-light-transmitting conductive materials, please refer to the foregoing, and will not be repeated here.

3, the main differences between the touch projection system 1B of the third embodiment and the touch projection system 1A of FIG. 2 are as follows. In the touch projection screen 10B of the touch projection system 1B, the first electrode layer 102 and the second electrode layer 105 are respectively disposed on two opposite surfaces of the first substrate 100, and the first electrode layer 102 and the second electrode layer 105 The first substrate 100 is electrically insulated from each other. Therefore, the touch projection screen 10B can omit the insulating layer 106 in FIG. 2.

In this embodiment, the first electrode layer 102 is disposed on the second surface S2 of the first substrate 100, the second electrode layer 105 is disposed on the first surface S1 of the first substrate 100, and the diffuse reflection layer 101 is disposed on the second surface S1. On the electrode layer 105, the protective layer 103 is disposed on the first electrode layer 102 and covers the first electrode layer 102. However, in another embodiment, the positions of the first electrode layer 102 and the second electrode layer 105 can be reversed, so that the diffuse reflection layer 101 is disposed on the first electrode layer 102, and the protective layer 103 is disposed on the second electrode layer 105 On and covering the second electrode layer 105.

Referring to FIG. 4, the main differences between the touch projection system 1C of the fourth embodiment and the touch projection system 1A of FIG. 2 are as follows. In the touch projection system 1C, the touch projection screen 10C further includes a second substrate 107 and a non-conductive adhesive layer 108.

In detail, the second electrode layer 105 is not directly formed on the second substrate 107, but is first provided on the second substrate 107, and then the second substrate 107 provided with the second electrode layer 105 is deposited through the non-conductive adhesive layer 108 Attached to the first substrate 100. Furthermore, the non-conductive adhesive layer 108 is adhered to the first electrode layer 102 disposed on the second surface S2 of the first substrate 100, so that the first electrode layer 102, the non-conductive adhesive layer 108, and the second electrode layer 105 are located on the Between a substrate 100 and a second substrate 107.

The second substrate 107 is suitable for carrying the second electrode layer 105. For example, the second substrate 107 may be a glass substrate or a plastic substrate, but is not limited to this. According to different requirements, the second substrate 107 may be a rigid substrate, a flexible substrate or a rollable substrate. In addition, since the second substrate 107 is located behind the diffuse reflection layer 101 (viewed from the transmission direction of the image beam B) rather than in front of the diffuse reflection layer 101, the image formed on the diffuse reflection layer 101 is not affected by the second substrate. 107's penetration rate. Accordingly, the second substrate 107 may be light-transmissive or opaque.

Since the second electrode layer 105 is not directly formed on the second substrate 107, an alignment step is required during the attaching process. However, compared to the traditional multiple attaching process requiring multiple alignment steps, since the first electrode layer 102 is directly formed on the first substrate 100, at least one attaching process and at least one alignment step can be omitted.

In this embodiment, before the attaching process, the first electrode layer 102 has been disposed on the first substrate 100, and the second electrode layer 105 has been disposed on the second substrate 107. The diffuse reflection layer 101 may be formed on the first substrate 100 before or after the attaching process.

The non-conductive adhesive layer 108 can not only provide the adhesion effect, but also provide the insulation effect (to electrically insulate the first electrode layer 102 and the second electrode layer 105 from each other). Therefore, the touch projection screen 10C can omit the insulating layer 106 in FIG. 2. For example, the non-conductive adhesive layer 108 may include optical glue, but it is not limited thereto.

Referring to FIG. 5, the main differences between the touch projection system 1D of the fifth embodiment and the touch projection system 1C of FIG. 4 are as follows. In the touch projection screen 10C of the touch projection system 1C, the second electrode layer 105 is located between the non-conductive adhesive layer 108 and the second substrate 107. In the touch projection screen 10D of the touch projection system 1D, the second substrate 107 is located between the non-conductive adhesive layer 108 and the second electrode layer 105. In addition, the touch projection screen 10D may further include a protective layer 103. The protective layer 103 is disposed on the second electrode layer 105 and covers the second electrode layer 105 to provide anti-scratch and anti-oxidation effects.

Please refer to FIG. 6, the main differences between the touch projection system 1E of the sixth embodiment and the touch projection system 1C of FIG. 4 are as follows. In the touch projection screen 10C of the touch projection system 1C, the non-conductive adhesive layer 108 is adhered to the first electrode layer 102 disposed on the second surface S2 of the first substrate 100, so that the first electrode layer 102 and the non-conductive adhesive layer The layer 108, the second electrode layer 105, and the second substrate 107 are located on the same side of the first substrate 100. In the touch projection screen 10E of the touch projection system 1E, the non-conductive adhesive layer 108 is adhered to the first surface S1 of the first substrate 100, so that the diffuse reflection layer 101, the non-conductive adhesive layer 108, the second electrode layer 105 and the first substrate 100 The two substrates 107 are located on the same side of the first substrate 100, and the second substrate 107, the second electrode layer 105, the non-conductive adhesive layer 108 and the first substrate 100 are located between the diffuse reflection layer 101 and the first electrode layer 102. In addition, the touch projection screen 10E may further include a protective layer 103. The protective layer 103 is disposed on the first electrode layer 102 and covers the first electrode layer 102 to provide anti-scratch and anti-oxidation effects.

In this embodiment, the second electrode layer 105 is located between the second substrate 107 and the diffuse reflection layer 101. Under this structure, the diffuse reflection layer 101 is formed on the second electrode layer 105 after the aforementioned attaching process. In another embodiment, the positions of the second electrode layer 105 and the second substrate 107 can be swapped, and the diffuse reflection layer 101 can be formed on the second substrate 107 after the aforementioned attaching process.

Please refer to FIG. 7, the main differences between the touch projection system 1F of the seventh embodiment and the touch projection system 1 of FIG. 1 are as follows. In the touch projection screen 10F of the touch projection system 1F, the first electrode layer 102 and the diffuse reflection layer 101 are stacked on the same surface of the first substrate 100. Furthermore, the first electrode layer 102 and the diffuse reflection layer 101 are sequentially formed on the first surface S1 of the first substrate 100, and the first electrode layer 102 is located between the first substrate 100 and the diffuse reflection layer 101. Under this structure, the diffuse reflection layer 101 is not only used for imaging, but also can protect the first electrode layer 102 (for example, anti-scratch and anti-oxidation). Therefore, the touch projection screen 10F can omit the protective layer 103 in FIG. 1.

Please refer to FIG. 8, the main differences between the touch projection system 1G of the eighth embodiment and the touch projection system 1F of FIG. 7 are as follows. In the touch projection system 1G, the touch projection screen 10G further includes a second electrode layer 105 and an insulating layer 106, and the first electrode layer 102, the insulating layer 106, the second electrode layer 105 and the diffuse reflection layer 101 are sequentially formed on On the first surface S1 of the first substrate 100. Please refer to the foregoing for related content of the second electrode layer 105 and the insulating layer 106, and will not be repeated here.

Please refer to FIG. 9, the main differences between the touch projection system 1H of the ninth embodiment and the touch projection system 1F of FIG. 7 are as follows. In the touch projection system 1H, the touch projection screen 10H further includes a second electrode layer 105, a second substrate 107 and a non-conductive adhesive layer 108.

In detail, the second electrode layer 105 is first disposed on the second substrate 107, and then the second substrate 107 provided with the second electrode layer 105 is attached to the first substrate 100 through the non-conductive adhesive layer 108. The related content of the second electrode layer 105, the second substrate 107 and the non-conductive adhesive layer 108 please refer to the foregoing, and will not be repeated here.

In this embodiment, the first electrode layer 102, the first substrate 100, the non-conductive adhesive layer 108, and the second electrode layer 105 are located between the diffuse reflection layer 101 and the second substrate 107. However, in another embodiment, the positions of the second electrode layer 105 and the second substrate 107 can be adjusted so that the first electrode layer 102, the first substrate 100, the non-conductive adhesive layer 108 and the second substrate 107 are located on the diffuse reflection layer. Between 101 and the second electrode layer 105.

Another mention is that in any of the foregoing embodiments where the double-electrode structure is formed by the attaching process, the non-conductive adhesive layer 108 can be changed to be adhered to the surface of the diffuse reflection layer 101 facing the projection device 11. Under this structure, since the non-conductive adhesive layer 108, the second electrode layer 105, and the second substrate 107 are located in front of the diffuse reflection layer 101 (viewed from the transmission direction of the image beam B), the visual effects of these layers must be considered Impact. For example, the non-conductive adhesive layer 108, the second electrode layer 105, and the second substrate 107 must be transparent to avoid affecting the visual effect. In addition, the surface of the second substrate 107 facing the projection device 11 may be a roughened surface to reduce the negative impact of the smooth surface on the visual effect (such as glare and visual interference caused by the overlap of the background image and the display image).

In summary, in the touch projection screen and the touch projection system of the embodiments of the present invention, the electrode layer is provided to detect the change in capacitance value, thereby realizing the touch function. Therefore, the touch projection system does not require additional camera modules and other components to achieve human-computer interaction. In addition, since at least one electrode layer (or all electrode layers) required for touch control is directly formed on the substrate provided with the diffuse reflection layer, the number of alignments can be effectively reduced, or even the number of alignments can be omitted, which helps to shorten the manufacturing process. Time and improve yield. Therefore, the touch projection screen and the touch projection system of the embodiments of the present invention can take into account cost, manufacturing time, and yield. In one embodiment, the touch projection screen may further include other film layers as required. In another embodiment, at least one film layer (such as a protective layer and/or an insulating layer, etc.) can be omitted by changing the relative arrangement relationship of the film layers. In another embodiment, by adjusting the relative arrangement relationship and/or thickness of these film layers, the electrode layer in the touch projection screen is arranged adjacent to the neutral axis of the touch projection screen, so that the electrode layer can be reduced. The compressive stress and tensile stress that the touch projection screen bears when it is flexed or curled can prolong the service life of the touch projection screen.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the relevant technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be determined by the scope of the attached patent application.

1. 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H: touch projection system 10, 10A, 10B, 10C, 10D, 10E, 10F, 10G, 10H: touch projection screen 11: Projection device 100: first substrate 101: Diffuse reflection layer 102: first electrode layer 103: protective layer 104: storage device 105: second electrode layer 106: Insulation layer 107: second substrate 108: Non-conductive adhesive layer B: image beam S1: First surface S2: second surface

1 to 9 are schematic diagrams of the touch projection system according to the first embodiment to the ninth embodiment of the present invention, respectively.

1: Touch projection system

10: Touch projection screen

11: Projection device

100: first substrate

101: Diffuse reflection layer

102: first electrode layer

103: protective layer

104: storage device

B: image beam

S1: First surface

S2: second surface

Claims (6)

A touch projection screen includes: a first substrate; a diffuse reflection layer disposed on the first substrate; a first electrode layer disposed on the first substrate, wherein the first electrode layer and the diffuse reflection layer Layers overlap, and the first electrode layer and the first substrate are in contact with a second electrode layer; and an insulating layer, wherein the first electrode layer, the insulating layer, and the second electrode layer are sequentially disposed on the first substrate on. The touch projection screen according to the first item of the scope of patent application, wherein the first electrode layer and the diffuse reflection layer are respectively disposed on two opposite surfaces of the first substrate. The touch projection screen according to claim 1, wherein the first electrode layer and the diffuse reflection layer are stacked on the same surface of the first substrate. The touch projection screen according to item 1 of the scope of patent application, wherein the diffuse reflection layer and the first electrode layer are respectively disposed on two opposite surfaces of the first substrate, or the diffuse reflection layer is disposed on the second electrode Layer up. The touch projection screen according to the first item of the scope of patent application, wherein the touch projection screen is a flexible touch projection screen or a rollable touch projection screen. A touch projection system includes: a touch projection screen, including: a first substrate; and a diffuse reflection layer disposed on the first substrate; A first electrode layer disposed on the first substrate, wherein the first electrode layer overlaps the diffuse reflection layer, and the first electrode layer is in contact with the first substrate; a second electrode layer; and an insulating layer , Wherein the first electrode layer, the insulating layer, and the second electrode layer are sequentially disposed on the first substrate; and a projection device adapted to provide an image beam, which irradiates the diffuse reflection layer.

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