CN211741770U - A dimmable touch whiteboard and a combined intelligent whiteboard - Google Patents

Abstract

The utility model discloses a light-adjustable touch-control whiteboard and a combined intelligent whiteboard, which belong to the technical field of touch-control whiteboards. The adjustable light touch whiteboard of the utility model has a casing comprising a frame and a backboard which can be butted and connected, the backboard is provided with a display module, and the side of the frame away from the backboard is sequentially provided with a light-adjustable film, The touch module and the glass plate, the touch module is a capacitive touch module. When the dimmable touch whiteboard is powered on, the dimmable film turns into a transparent state, so that the image of the display module can be displayed through the dimmable film; when the dimmable touch whiteboard is powered off, the dimmable film turns into a transparent state. Opaque state, and the thickness of the dimmable film is greater than or equal to 20nm, which can better cover the black color of the LCD panel of the display module, so that the overall appearance of the dimmable touch whiteboard is white, which is convenient for users to use. The smart whiteboard of the solution can be used as a whiteboard or a touch display device, and has a simple structure and convenient use.

Description

A dimmable touch whiteboard and a combined intelligent whiteboard

technical field

The utility model relates to the technical field of touch-control whiteboards, in particular to a light-adjustable touch-control whiteboard and a combined intelligent whiteboard.

Background technique

With the development of display technology, electronic whiteboards suitable for conferences and other business scenarios have emerged. However, electronic whiteboards commonly used in related fields often only have the functions of writing and writing records, but do not have the functions of display and touch. The all-in-one conference machine used as a display device does not have the function of writing and writing records. Therefore, most of the current conference scenes are generally equipped with an electronic whiteboard and a conference all-in-one machine at the same time, which is not only inconvenient to use, but also takes up a lot of space, making the conference scene appear cramped and cramped.

In order to solve the above problems, some electronic whiteboards for dimming have been developed. A layer of liquid crystal dimming glass is arranged between the display module and the touch module. This liquid crystal dimming glass is transparent when powered on. , in the case of power failure, it is a milky white translucent state, so this type of electronic whiteboard can be used as a touch display device when it is powered on, and can be used as a whiteboard when it is powered off. For example, a Chinese patent document named Liquid Crystal Interactive Electronic Whiteboard (Application No. 2017200320282) is invented and created. The electronic whiteboard in this application includes a liquid crystal dimming glass and an infrared touch frame, a liquid crystal dimming glass on the rear side and an infrared touch screen on the front side. Frame size matching is combined by the outer frame into one. The liquid crystal dimming glass is externally controlled by a controllable AC power supply. It is opaque and opaque when it is not powered on. It is usually used in the rear projection mode to solve the light blocking defect of the human body during front projection interaction. When the light transmittance is appropriate, it is easy to realize the front projection display. Adjust the voltage to change the light transmittance to achieve a satisfactory background display; the infrared touch frame has a USB interface, which is convenient for communication with the computer.

However, in actual use, it is found that within the normal acceptable thickness range, the dimming glass still has a light transmittance of more than 50% when it is not energized, and the liquid crystal panel of the display module in the off-screen state is black, which makes the adjustment When the light glass is not powered on, the RGB value is low, and it is actually displayed as light gray or gray, which affects the normal use of the whiteboard.

Utility model content

1. Technical problems to be solved by the utility model

The purpose of the utility model is to overcome the deficiencies in the prior art that the adjustable light touch whiteboard has a poor black shielding effect on the liquid crystal panel in a power-off state, and to provide a light adjustable touch whiteboard. The thickness of the adjustable light film of the touch whiteboard in this solution is at least 20 nm, so that the adjustable light film can block the black color of the liquid crystal panel when the power is turned off, thereby improving the color displayed by the touch whiteboard through the glass plate. RGB value.

Another object of the present invention is to provide a combined intelligent whiteboard. The smart whiteboard of this solution includes a dimmable touch whiteboard and a whiteboard writing board spliced with the dimmable touch whiteboard, so that the smart whiteboard of this solution can be used as both a whiteboard and a touch display device, which is more convenient used by users.

2. Technical solutions

In order to achieve the above object, the technical scheme provided by the present utility model is:

The adjustable light touch whiteboard of the utility model comprises a casing, wherein the casing comprises a frame and a backboard which can be connected in a butt joint, the backboard is provided with a display module, and the frame is far away from the backboard. A dimmable film, a touch module and a glass plate are arranged on one side in sequence, the touch module is a capacitive touch module, and the thickness of the dimmable film is greater than or equal to 20 nm;

The dimmable touch whiteboard is configured such that: the dimmable film is in a transparent state when powered on so that the dimmable touch whiteboard can be used as a touch display device, and the dimmable film is in an opaque state when the dimmable film is powered off so that the dimmable light can be adjusted. The touch whiteboard is used as a whiteboard.

Further, the display module and the adjustable light film are arranged close to or attached to each other; the touch module includes an ink layer, an adhesive layer and a touch graphic element layer, and the touch graphic element layer and the adjustable An isolation layer is arranged between the optical films.

Further, the isolation layer is an adhesive layer that is fully attached to the adjustable light film.

Further, the isolation layer is an isolation plate, and the isolation plate is made of PC material, or made of PMMA material, or made of PS material.

Further, the touch graphic element layer is a nano silver touch graphic element layer.

Further, the tunable light film is made of PDLC material, and the PDLC material is configured such that the molecular weight of the liquid crystal molecules composing its structure is greater than or equal to 200 g/mol.

Further, the glass plate is white glass, or green glass, or gray glass.

Further, the glass plate is configured such that one side of the glass plate away from the back plate is subjected to surface AG treatment so that its haze is 0.1-15%.

Further, an optical cavity is formed in the back plate, and the display module is accommodated in the optical cavity, and the display module includes a liquid crystal panel, an edge holder, a composite film, and a brightening film, and the composite film For the DOP composite membrane.

A combined intelligent whiteboard of the utility model comprises the above-mentioned adjustable light touch whiteboard, at least one of the two sides of the adjustable light touch whiteboard is spliced with a writing board, and the writing board is a whiteboard.

3. Beneficial effects

Compared with the prior art, the technical scheme provided by the present utility model has the following beneficial effects:

(1) The adjustable light touch whiteboard of the present invention has a casing comprising a frame and a backboard that can be connected in butt joints. The backboard is provided with a display module, and the side of the frame away from the backboard is sequentially provided with adjustable Optical film, touch module and glass plate, the touch module is a capacitive touch module. When the dimmable touch whiteboard is powered on, the display module turns on the screen to display images, and the dimmable film turns into a transparent state, so that the image of the display module can pass through the dimmable film; the dimmable touch When the whiteboard is powered off, the display module is turned off, and the dimmable film is turned into an opaque state, and the thickness of the dimmable film is greater than or equal to 20nm, which can better cover the black color of the LCD panel of the display module, so that the dimmable light can be adjusted. The touch whiteboard is white as a whole, which is convenient for users to use.

(2) In the present invention, after the thickness of the adjustable light film is increased, in order to achieve a better display effect, the adjustable light film needs to be placed close to the display module, so that the touch module and the display module Mutual electrical signal interference is prone to occur between the touch-control modules and the normal use of the touch-control module. Therefore, in the present invention, an isolation layer is arranged between the touch-control module and the adjustable light film, and the isolation layer can be an adhesive layer. It can also be an isolation plate. The isolation layer is used to isolate the electrical signal interference between the touch module and the display module, and at the same time, it can further shield the black displayed by the display module when the screen is off, and improve the whiteness of the touch whiteboard.

(3) In the present utility model, the glass plate is white glass, blue glass or gray glass, and the side of the glass plate away from the back plate is treated with surface AG, and the haze is 0.1-15%, so that the glass plate itself is Milky white with high RGB value, so when the display module is in the off-screen state, the glass plate can cooperate with the dimmable film to further shield the black color of the LCD panel and improve the whiteness of the touch whiteboard.

(4) A combined intelligent whiteboard of the present invention includes a dimmable touch-control whiteboard located in the middle position, one of the two sides of the dimmable touch-control whiteboard is spliced with a writing board, or both sides are spliced with a writing board board, the writing board is a white board. The combined intelligent whiteboard of the utility model can be used as a touch display device when the dimmable touch control whiteboard is powered on, and can be used as an ordinary whiteboard when the dimmable touch control whiteboard is powered off, and has a simple structure and is convenient for users to use.

Description of drawings

1 is a schematic structural diagram of an adjustable light touch whiteboard of the present invention;

Fig. 2 is the structural representation of the frame in the utility model;

3 is a schematic diagram of the structural cooperation of the display module and the backplane in the present invention;

FIG. 4 is a schematic diagram of the structure cooperation of the touch module and the adjustable light film in the present invention;

FIG. 5 is a schematic structural diagram of the combined intelligent whiteboard of the present invention.

Description of the symbols in the schematic diagram: 100, dimmable touch whiteboard; 111, glass plate; 112, touch module; 1121, ink layer; 1122, adhesive layer; 1123, touch graphic element layer; 1124, isolation layer 113, adjustable light film; 121, liquid crystal panel; 122, edge holder; 123, composite film; 124, brightening film; 131, frame; 132, back plate;

Detailed ways

In order to further understand the content of the present utility model, the present utility model is described in detail with reference to the accompanying drawings and embodiments.

The structures, proportions, sizes, etc. shown in the drawings in this specification are only used to cooperate with the contents disclosed in the specification for the understanding and reading of those who are familiar with the technology, and are not used to limit the conditions for the implementation of the present invention. Therefore, without technical substantive significance, any modification of the structure, the change of the proportional relationship or the adjustment of the size should still fall within the scope of the present invention without affecting the effect that the present invention can produce and the purpose that can be achieved. The disclosed technical content must be within the scope of coverage. At the same time, terms such as "up", "down", "left", "right", "middle", etc. quoted in this specification are only for the convenience of description and clarity, and are not used to limit the scope of implementation. The change or adjustment of the relative relationship should also be regarded as the scope of the present invention without substantial changes in the technical content.

Referring to FIG. 1 , the adjustable light touch whiteboard of this embodiment includes a casing, and the casing is specifically formed by butt joint connection of a frame 131 and a back plate 132 . 3 , the back panel 132 is provided with a plurality of cross-connected reinforcing ribs 133 to enhance the overall strength and stability of the dimmable touch whiteboard 100 . A display module is also provided on the back panel 132 for displaying images.

Referring to FIG. 2 , the frame 131 is provided with a dimmable film 113 , a touch module 112 and a glass plate 111 , and the dimmable film 113 , the touch module 112 and the glass plate 111 are arranged in sequence, and the glass plate 111 is disposed on the frame The outermost of 131. Wherein, the touch module 112 is used to realize touch operation, and specifically can be a capacitive touch module. The structure of the capacitive touch module can refer to capacitive screens commonly used in related fields, or be implemented in a manner suggested by the manufacturer. In the implementation manner, the related content will not be repeated.

The tunable light film 113 may specifically be a film made of materials including PDLC, wherein the PDLC material is also called polymer dispersed liquid crystal, which is a material in which liquid crystals are dispersed in an organic solid polymer matrix with micron-sized particles. When the PDLC material is not energized, the optical axis of the droplets of liquid crystal molecules is in a disordered state, and its refractive index is different from the light shielding rate of the matrix material, so that the light is strongly scattered when passing through the adjustable light film 113, so that it can be The light-adjusting film 113 is in a milky white translucent state as a whole; when the PDLC material is energized, the applied electric field will force the optical axis of the liquid crystal droplets to change, so that the refractive index of the PDLC and the shading rate of the matrix material are basically the same, Thus, the entirety of the adjustable light film 113 is in a transparent state. Therefore, selecting the PDLC material as the dimmable film 113 can realize the switching between the touch display device and the whiteboard of the dimmable touch whiteboard 100 of this embodiment.

However, it should be pointed out that the thickness of the adjustable light film 113 of PDLC material commonly used in related fields is about 5-10 nm, and it still has a light transmittance of more than 50% in the case of no electricity, while the display module The black liquid crystal panel 121 can be displayed on the glass plate 111 through the adjustable light film 113, so that when the adjustable light touch whiteboard 100 is observed from the outside of the glass plate 111, The dimmable touch whiteboard 100 is generally gray or cream gray.

Therefore, in order to improve the shielding effect of the adjustable light film 113 on the black color of the liquid crystal panel 121 itself, the thickness of the adjustable light film 113 in this embodiment is set to be more than 20 nm, so that the adjustable light film 113 is not energized. Only 40% of the light transmittance is retained, so the shading effect of the adjustable light film 113 on the black color of the liquid crystal panel 121 itself can be greatly improved, and the color displayed by the adjustable light touch whiteboard 100 in a power-off state can be improved. RGB value to improve its overall whiteness. Meanwhile, the thickness of the adjustable light film 113 in this embodiment should generally not exceed 1 cm. The reason is that when the thickness of the adjustable light film 113 exceeds 1 cm, the transparency of the adjustable light film 113 in the power-on state is not enough to make the liquid crystal The light emitted by the panel is transmitted and clearly displayed on the glass plate 111 .

In addition, a PDLC material with a larger liquid crystal molecular weight can be selected as the dimmable film 113 of this embodiment, and specifically a PDLC material with a liquid crystal molecular weight greater than 200 g/mol can be selected, so as to further improve the dimmable light of the liquid crystal panel 121 in the off-screen state. The film 113 has a shielding effect on the black color of the liquid crystal panel 121 itself.

Since the shielding effect of the adjustable light film 113 is improved by increasing the thickness of the adjustable light film 113 in this embodiment, the light transmittance of the adjustable light film 113 is also reduced when the power is turned on. Therefore, in order to improve the transmittance of the adjustable light film 113 to the light emitted by the liquid crystal panel 121 under the condition of power-on, as an optimization of this embodiment, the distance between the adjustable light film 113 and the display module can be reduced, Specifically, the adjustable light film 113 can be attached to the display module or arranged in close proximity. The so-called lamination setting in this embodiment means that the dimmable film 113 is integrally attached to the surface of the liquid crystal panel 121, thereby reducing the distance between the dimmable film 113 and the display module; The adjustable light film 113 is disposed close to the surface of the liquid crystal panel 121 , and the distance between the adjustable light film 113 and the display module is smaller than the general distance between the adjustable light film 113 and the display module in the related art.

For the infrared touch adjustable light whiteboard, since the infrared touch unit is disposed on the frame, the distance between the adjustable light film 113 and the display module is reduced without causing interference to the infrared touch unit.

However, for the dimmable whiteboard with capacitive touch in this embodiment, after reducing the distance between the dimmable film 113 and the display module, the touch module 112 and the display module attached to the dimmable film 113 The distance between the groups is also reduced accordingly, so that the electrical signal of the display module is likely to interfere with the touch module 112 , which increases the probability of misoperation or misjudgment, and affects the normal use of the touch module 112 . Therefore, as a further optimization, referring to FIG. 4 , an isolation layer 1124 is further provided between the touch module 112 and the adjustable light film 113 in this embodiment, and the isolation layer 1124 is used to shield the electrical signals of the display module. Reduce or eliminate the interference of the electrical signal of the display module to the touch module. The thickness of the isolation layer 1124 in this embodiment may be 0.05 mm˜5 cm, so that the isolation layer 1124 can not only achieve the purpose of isolating electrical signal interference, but also ensure the transmittance of light emitted by the liquid crystal panel.

Specifically, the isolation layer 1124 may be an adhesive layer, the adhesive layer is composed of an insulating and transparent adhesive, and the adhesive layer is fully attached to the touch module 112 and the adjustable light film 113 , thereby reducing touch The distance between the control module 112 and the adjustable light film 113 can improve the transmittance of the light emitted by the liquid crystal panel 121 when the adjustable light film 113 is powered on, and at the same time prevent the electrical signal of the display module from affecting the touch module. group interference.

The isolation layer 1124 can also be an isolation plate made of an insulating and transparent material, and the material can specifically be a PC material, that is, a polycarbonate material; it can also be a PMMA material, that is, a polymethyl methacrylate material; or PS material, namely polystyrene material.

The touch module 112 of this embodiment, referring to FIG. 4 , may specifically include an ink layer 1121 , an adhesive layer 1122 and a touch graphic element layer 1123 , wherein the ink layer 1121 , the adhesive layer 1122 and the touch graphic element layer 1123 Arranged in sequence, the touch graphic element layer 1123 and the adjustable light film 113 are provided with an isolation layer 1124 . The touch graphic element layer 1123 may specifically be a nano-silver touch graphic element layer, and the horizontal and vertical conductive lines on both sides of the graphic element layer can be made of nano-silver material to form a grid-shaped capacitive touch graphic element. The nano-silver material itself is white or milky white. And as described in the documents disclosed in the related field, the light transmittance of the nano silver touch graphic element layer is above 80%, and the haze is not more than 1.5%, so the nano silver touch graphic element layer can be used in the display mode. When the group is in the off-screen state, the auxiliary dimmable film 113 achieves the best black shading effect, and at the same time, when the display module is in the bright-screen state, the overall display effect of the dimmable touch whiteboard 100 is not affected.

The glass plate 111 in this embodiment may be white glass, blue glass, or gray glass, and its own light transmittance is lower than that of the conventional display glass plate in the related field, thereby improving the ability of display module liquid crystal The masking effect of the panel black. In addition, the glass plate 111 can also be beige, yellow, green, blue and other colored transparent glass, so that the adjustable light touch whiteboard 100 is displayed as non-black as a whole when the power is turned off, which meets the needs of different usage environments. Here, it should be understood that the adjustable light touch whiteboard 100 in the present embodiment is only taken as an example of white color, and the adjustable light touch whiteboard 100 in the present invention should be understood as corresponding to The concept of a touch display blackboard should not be narrowly regarded as a touchable and displayable whiteboard with an overall white appearance.

As a further optimization, the side of the glass plate 111 facing away from the back plate 132 can be subjected to surface AG treatment, that is, polarizer surface treatment, so that the haze of the glass plate 111 is 0.1-15%. When the haze is less than 0.1%, the glass plate 111 is too smooth, which is not conducive to writing, and when the haze of the glass plate 111 is greater than 15%, the glass plate 111 will block or scatter a large amount of light emitted by the display module, and the wire image displays Vague. In addition, the glass plate with a haze of 0.1-15% is milky white as a whole, which is beneficial to improve the covering effect of black in the screen-off state of the display module.

The backplane 132 of the present embodiment has an optical cavity formed therein, and the optical cavity is used to accommodate the display module, that is, the display module is installed and fixed in the backplane 132 , and specifically can be embedded in the side of the backplane 132 . on the side. Specifically, the display module may include a liquid crystal panel 121 , an edge holder 122 , a composite film 123 and a brightness enhancement film 124 . Among them, the composite film 123 and the enhancement film 124 are arranged in the back plate 132 in sequence, and the edge holder 122 is arranged on the composite film 123 and cooperates with the side of the back plate 132 to fix the composite film 123 and the enhancement film; A projection piece is provided, which serves as a light source. The composite film 123 may specifically be a DOP film, or a prism film. The composite film 123 and the light enhancement film 124 are used to improve the light intensity of the display module.

It should be noted that this embodiment only provides an example of a display module, and other liquid crystal display modules in related fields can also be used as display modules in this embodiment. Group. Its structure and implementation can be carried out in accordance with the disclosed documents or the methods suggested by the manufacturer, so the relevant content will not be repeated in this implementation.

Referring to FIG. 5 , the present embodiment also provides a combined smart whiteboard, including the above-mentioned dimmable touch-control whiteboard 100 . At least one of the two sides of the dimmable touch-control whiteboard 100 is spliced with a writing board 200 . 200 is the whiteboard. Wherein, the adjustable light film 113 is in a transparent state when powered on so that the adjustable light touch whiteboard 100 can be used as a touch display device, and the adjustable light film 113 is in an opaque state when powered off so that the adjustable light touch whiteboard 100 can be used as a whiteboard .

The present invention and its embodiments have been schematically described above, and the description is not restrictive, and what is shown in the accompanying drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it, without departing from the purpose of creation of the present invention, without creative design of the structure and embodiment similar to the technical solution, all should belong to the present invention. protected range.

Claims (10)

1. The utility model provides a touch-control blank can adjust luminance which includes the casing, its characterized in that: the shell comprises a frame (131) and a back plate (132) which can be connected in a folding mode, a display module is arranged on the back plate (132), a light-adjustable film (113), a touch module (112) and a glass plate (111) are sequentially arranged on one side face, away from the back plate (132), of the frame (131), the touch module (112) is a capacitive touch module, and the thickness of the light-adjustable film (113) is larger than or equal to 20 nm;

the dimmable touch whiteboard (100) is configured to: the dimmable film (113) is in a transparent state when powered on so that the dimmable touch whiteboard (100) can be used as a touch display device, and the dimmable film (113) is in an opaque state when powered off so that the dimmable touch whiteboard (100) can be used as a whiteboard.

2. The dimmable touch whiteboard of claim 1, wherein: the display module is arranged close to or attached to the light-adjustable film (113); the touch module (112) comprises an ink layer (1121), an adhesive layer (1122) and a touch graphic element layer (1123), wherein an isolation layer (1124) is arranged between the touch graphic element layer (1123) and the dimmable film (113).

3. The dimmable touch whiteboard of claim 2, wherein: the isolation layer (1124) is an adhesive layer which is fully attached to the dimmable film (113).

4. The dimmable touch whiteboard of claim 2, wherein: the isolation layer (1124) is an isolation plate made of a PC material, a PMMA material or a PS material.

5. The dimmable touch whiteboard of claim 2, wherein: the touch control element layer (1123) is a nano-silver touch control element layer.

6. The dimmable touch whiteboard of claim 1, wherein: the dimmable film (113) is made of a PDLC material configured to: the molecular weight of the liquid crystal molecules constituting the structure thereof is greater than or equal to 200 g/mol.

7. The dimmable touch whiteboard of claim 1, wherein: the glass plate (111) is white glass, or green glass, or gray glass.

8. The dimmable touch whiteboard of claim 7, wherein: the glass plate (111) is configured to: the surface AG treatment is performed on one side of the glass plate (111) far away from the back plate (132) to ensure that the haze of the glass plate is 0.1-15%.

9. The dimmable touch whiteboard of claim 1, wherein: a light cavity is formed in the back plate (132), the display module is accommodated in the light cavity and comprises a liquid crystal panel (121), a blank holder strip (122), a composite film (123) and a brightness enhancement film (124), and the composite film (123) is a DOP composite film.

10. A combination intelligence blank which characterized in that: the dimmable touch whiteboard (100) of any of claims 1 to 9, wherein a writing board (200) is spliced on at least one of two sides of the dimmable touch whiteboard (100), and the writing board (200) is a whiteboard.

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