CN211506770U - Touch control blackboard - Google Patents

Abstract

The application discloses a touch blackboard. This touch blackboard includes: a backlight portion, the backlight portion comprising: the LED array substrate comprises a diffusion plate, a patterned quantum dot film and an LED dot matrix which are sequentially arranged from front to back; and the touch control part is arranged on the outer side of the diffusion plate and is used for adjusting the brightness of the LED at the corresponding position in the LED dot matrix by touching different positions of the touch control part. The application solves the technical problems that the contrast is limited and the display effect is not good.

Description

Touch control blackboard

Technical Field

The application relates to the field of electronic blackboards, in particular to a touch blackboard.

Background

The electronic blackboard is an electronic product for realizing information education, and functions of blackboard writing, demonstration, remote teaching and the like without chalk can be realized by integrating a novel touch technology, a mobile internet and an artificial intelligence technology. The electronic blackboard adopts the liquid crystal display as a display unit, so that the color gamut is low, and the color presenting effect is poor.

The utility model provides a wisdom blackboard and combination blackboard thereof, application number is 201721700811.8, provides a quantum dot blackboard, improves through quantum dot technique of being shaded, and the colour gamut of blackboard promotes 50%, and the color display effect has obvious improvement. The quantum dot blackboard adopts a direct type blue light LED as an excitation light source, and a quantum dot film is positioned above a diffusion plate and is converted into white light with high color gamut under the excitation of the blue light.

However, this structure cannot perform local brightness adjustment of the LED, and the color gamut is narrow, so that the contrast is limited, and the display effect is not good.

Aiming at the problems that the contrast ratio is limited and the display effect is poor in the related technology, an effective solution is not provided at present.

SUMMERY OF THE UTILITY MODEL

The main objective of the present application is to provide a touch blackboard to solve the problem that the contrast is limited and the display effect is not good.

In order to achieve the above object, according to one aspect of the present application, there is provided a touch blackboard.

The touch blackboard according to the application includes: a backlight portion, the backlight portion comprising: the LED array substrate comprises a diffusion plate, a patterned quantum dot film and an LED dot matrix which are sequentially arranged from front to back; and the touch control part is arranged on the outer side of the diffusion plate and is used for adjusting the brightness of the LED at the corresponding position in the LED dot matrix by touching different positions of the touch control part.

Further, the diffusion plate is display glass with a diffusion function.

Furthermore, the LED dot matrix is arranged in a dot matrix manner by a plurality of blue light lamp beads.

Further, the dominant wavelength of the blue light bead is 445nm-455 nm.

Further, the touch part is a metal grid conductive film.

Furthermore, the metal grid conductive film is manufactured by adopting a nano-imprinting process, a copper etching process, a silver salt exposure process and a metal wiring process.

Furthermore, the patterned quantum dot film can be manufactured by adopting a nano-imprinting, micro-concave coating or ink-jet printing mode.

Further, the light emitting area patterns of the patterned quantum film correspond to the LEDs in the LED lattice one by one.

Further, the method also comprises the following steps: the backlight module comprises cover plate glass and a fixing frame, wherein the cover plate glass is arranged on the outer side of the diffusion plate, and the fixing frame is fixed on the periphery of the cover plate glass, the backlight part and the touch part.

Further, the surface of the cover plate glass is subjected to anti-glare treatment.

In the embodiment of the present application, a manner of improving a structure of a backlight unit is adopted, and the backlight unit includes: the LED array substrate comprises a diffusion plate, a patterned quantum dot film and an LED dot matrix which are sequentially arranged from front to back; the touch control part is arranged on the outer side of the diffusion plate and is used for adjusting the brightness of the LEDs at the corresponding positions in the LED dot matrix by touching different positions of the touch control part; but local regulation LED luminance has been reached, and the purpose of promotion colour gamut to realize showing the demonstration contrast that improves the blackboard, and promoted display effect's technological effect, and then solved the contrast and received the restriction, and the not good technical problem of display effect.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:

FIG. 1 is a schematic structural diagram of a touch blackboard according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a touch blackboard according to an embodiment of the present application.

Reference numerals

1. A backlight section; 2. a diffusion plate; 3. patterning the quantum dot film; 4. an LED dot matrix; 5. a touch section; 6. cover plate glass; 7. a fixing frame is provided.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1-2, the present application relates to a touch blackboard, including: a backlight 1, said backlight 1 comprising: the LED light source comprises a diffusion plate 2, a patterned quantum dot film 3 and an LED dot matrix 4 which are arranged from front to back in sequence; and the touch control part 5 is arranged on the outer side of the diffusion plate 2 and is used for adjusting the brightness of the LEDs on the corresponding positions in the LED dot matrix 4 by touching different positions of the touch control part 5.

Specifically, the backlight 1 refers to the backlight 1 portion of the display. The diffusion plate 2 has a function of diffusing light, and preferably in this embodiment, the diffusion plate 2 is display glass having a diffusion function, and the display glass is made of a transparent material. The patterned quantum dot film 3 is a patterned quantum dot film, and has the effects of improving color saturation to a certain extent and improving color gamut; in this embodiment, the patterned quantum dot film 3 may be fabricated by nanoimprint, gravure coating, or inkjet printing. The LED dot matrix 4 has the function of emitting light after being electrified; as preferred in this embodiment, the LED dot matrix 4 is formed by arranging a plurality of blue light beads in a dot matrix; preferably, in this embodiment, the dominant wavelength of the blue light bead is 445nm to 455 nm; the quantity of blue light lamp pearl is selected and optimized the adjustment according to the size of electron black board. Different positions of the touch part 5 are respectively arranged in one-to-one correspondence with the LEDs in the LED dot matrix 4, as is preferred in this embodiment, the touch part 5 is a metal grid conductive film, as is preferred in this embodiment, and light emitting region patterns of the patterned quantum film are in one-to-one correspondence with the LEDs in the LED dot matrix 4; each grid corresponds to an LED and corresponds to a pattern in the quantum film, and a plurality of metal grids correspond to each LED in the LED lattice 4, thus providing technical support for local brightness adjustment. Specifically, the brightness of the LEDs at corresponding positions in the LED dot matrix 4 is adjusted by touching different positions of the metal grid conductive film; but reached local regulation LED luminance, the principle is: each lamp bead of the blue light backlight module is endowed with X and Y two-dimensional coordinate values, and a circuit is designed. Through touch-control metal mesh touch-control membrane, the X of production, Y coordinate signal can correspond with the X of blue light LED dot matrix 4 in a poor light, Y coordinate to this control corresponds the luminance of the LED on the position, so, has realized the purpose that can locally adjust LED luminance, thereby can show the demonstration contrast that improves the blackboard, and promote display effect. The brightness of the blue LED can be adjusted according to the display picture, the color gamut is improved by 30-50% compared with the traditional electronic blackboard, and meanwhile, the display contrast of the blackboard can be obviously improved by the local brightness adjusting technology, and the effect of saving energy consumption can be achieved.

In this embodiment, preferably, a light guide plate is further disposed between the LED dot matrix 4 and the diffusion plate 2, so as to transmit light emitted from the LED dot matrix 4, thereby improving the display effect.

From the above description, it can be seen that the following technical effects are achieved by the present application:

in the embodiment of the present application, in a manner of improving the structure of the backlight portion 1, the backlight portion 1 includes: the LED light source comprises a diffusion plate 2, a patterned quantum dot film 3 and an LED dot matrix 4 which are arranged from front to back in sequence; the touch control part 5 is arranged on the outer side of the diffusion plate 2, and the brightness of the LEDs on the corresponding positions in the LED dot matrix 4 is adjusted by touching different positions of the touch control part 5; but local regulation LED luminance has been reached, and the purpose of promotion colour gamut to realize showing the demonstration contrast that improves the blackboard, and promoted display effect's technological effect, and then solved the contrast and received the restriction, and the not good technical problem of display effect.

Preferably, in this embodiment, the metal grid conductive film is made by using a metal grid conductive film and adopting a nano-imprinting process, a copper etching process, a silver salt exposure process and a metal wiring process; in particular, metallic silver is used as the conductive material of the metal grid; the touch screen has the advantages of good conductivity, high touch precision, high sensitivity and good reliability.

Preferably, in this embodiment, the method further includes: the backlight module comprises cover glass 6 and a fixing frame 7, wherein the cover glass 6 is arranged on the outer side of the diffusion plate 2, and the fixing frame 7 is fixed on the periphery of the cover glass 6, the backlight part 1 and the touch part 5. The cover glass 6 is matched with the fixing frame 7, and has the functions of protecting the cover glass 6 of the diffusion plate 2 on the inner side, the backlight part 1 and the touch part 5.

As is preferable in this embodiment, the surface of the cover glass 6 is subjected to an anti-glare treatment; the effects of relaxing and protecting eyes are achieved, and the harm to the eyes of people caused by watching the electronic blackboard for a long time is reduced.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A touch blackboard, comprising: a backlight portion, the backlight portion comprising: the LED array substrate comprises a diffusion plate, a patterned quantum dot film and an LED dot matrix which are sequentially arranged from front to back; and the touch control part is arranged on the outer side of the diffusion plate and is used for adjusting the brightness of the LED at the corresponding position in the LED dot matrix by touching different positions of the touch control part.

2. The touch blackboard of claim 1, wherein the diffuser plate is display glass with a diffusing function.

3. The touch blackboard of claim 1, wherein the LED array is a matrix arrangement of a plurality of blue light beads.

4. The touch control blackboard of claim 3, wherein the dominant wavelength of the blue light bead is 445nm-455 nm.

5. The touch blackboard of claim 1, wherein the touch portion is a metal mesh conductive film.

6. The touch blackboard of claim 5, wherein the metal grid conductive film is manufactured by using a nano-imprinting process, a copper etching process, a silver salt exposure process and a metal wiring process.

7. The touch control blackboard of claim 1, wherein the patterned quantum dot film can be made by nanoimprint, gravure coating or inkjet printing.

8. The touch blackboard of claim 1, wherein the light emitting area pattern of the patterned quantum film corresponds to the LEDs in the LED lattice one to one.

9. The touch blackboard of claim 1, further comprising: the backlight module comprises cover plate glass and a fixing frame, wherein the cover plate glass is arranged on the outer side of the diffusion plate, and the fixing frame is fixed on the periphery of the cover plate glass, the backlight part and the touch part.

10. The touch blackboard of claim 9, wherein the surface of the cover glass is anti-glare.

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