CN213659140U - Display device - Google Patents

Abstract

The utility model discloses a display device. Wherein, the device includes: the LED lamp comprises a back plate, wherein a light bar is arranged on the surface of the back plate, and a white light emitting diode and an infrared light emitting diode are arranged on the light bar; the reflector plate is positioned above the back plate and used for reflecting light emitted by the light bar; and the diffusion plate is positioned above the reflection sheet and used for diffusing the light emitted by the light bar. The utility model provides a display device among the correlation technique can't restrict the shooting device who has the function of shooing and take a candid photograph, has the technical problem who reveals the content on this display device of divulging a secret.

Description

Display device

Technical Field

The utility model relates to a show the field, particularly, relate to a display device.

Background

With the development of display technology, the application of commercial liquid crystal displays in commercial exhibition is becoming more and more widespread, such as: the liquid crystal advertising machine, the touch all-in-one machine, the liquid crystal splicing screen, the teaching touch all-in-one machine, the electronic class board, the intelligent conference tablet and the AI advertising machine all belong to the category of commercial display, however, in a very large number of application scenes, for example, when the content displayed by the display is conference content or PPT data which cannot be disclosed to the outside, the display in the related art cannot limit the mobile phone and other shooting devices with the shooting function to carry out candid shooting, and the technical problem of displaying the content in a divulged way exists.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a display device, which at least solves the technical problems that the display device in the related art cannot limit a shooting device with a shooting function to carry out candid shooting and the content displayed on the display device is divulged.

According to an aspect of an embodiment of the present application, there is provided a display device including: the LED lamp comprises a back plate, wherein a light bar is arranged on the surface of the back plate, and a white light emitting diode and an infrared light emitting diode are arranged on the light bar; the reflector plate is positioned above the back plate and used for reflecting light emitted by the light bar; and the diffusion plate is positioned above the reflection sheet and used for diffusing the light emitted by the light bar.

Optionally, a wiring terminal is arranged on the light bar and connected to the power panel through a wire.

Optionally, the white light emitting diode and the infrared light emitting diode respectively adopt different power driving circuits.

Optionally, the display device further comprises: the optical film combination is used for improving the optical shielding property and is positioned above the diffusion plate, and the optical film combination at least comprises two films.

Optionally, a ratio of a height of the cavity to a half distance between adjacent infrared light emitting diodes on the light bar is smaller than a tangent value of an emission angle of the infrared light emitting diodes, wherein the height of the cavity is a vertical distance from a light emitting surface of the infrared light emitting diodes to the optical film assembly.

Optionally, the display device further comprises: and the liquid crystal panel is positioned above the optical film combination, and toughened glass for protecting the liquid crystal panel is arranged above the liquid crystal panel.

Optionally, the display device further comprises one of: the front frame or the fixing glue is used for fixing the back plate, the reflecting sheet, the diffusion plate, the optical film combination, the liquid crystal panel and the toughened glass.

Optionally, the reflecting sheet is provided with through holes for exposing the white light emitting diodes and the infrared light emitting diodes.

Optionally, the white light emitting diode and the through hole corresponding to the white light emitting diode are in one-to-one correspondence; the infrared light-emitting diodes and the through holes corresponding to the infrared light-emitting diodes are in one-to-one correspondence.

Optionally, the white light emitting diode and the infrared light emitting diode are arranged on the back plate at intervals.

Optionally, the first light bar where the white light emitting diode is located and the second light bar where the infrared light emitting diode is located are arranged on the back plate at intervals.

Optionally, the back plate is machined from metal.

In an embodiment of the present application, there is provided a display device, including: the LED lamp comprises a back plate, wherein a light bar is arranged on the surface of the back plate, and a white light emitting diode and an infrared light emitting diode are arranged on the light bar; the reflector plate is positioned above the back plate and used for reflecting light emitted by the light bar; and the diffusion plate is positioned above the reflection sheet and used for diffusing the light emitted by the light bar. The utility model discloses a display device sets up the lamp strip through the surface at the backplate, sets up white light emitting diode and infrared emitting diode on the lamp strip, has utilized the infrared luminous naked eye invisibility, and shoots the device to infrared luminous identifiability, has reached the effect that the interference was shot the device and was taken a picture, and the unable restriction of display device who has the function of taking a picture of having solved among the correlation technique shoots secretly the shooting device that has the function, has the technical problem who reveals the content that shows on this display device.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

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

FIG. 2 is a schematic view of an alternative arrangement of infrared light emitting diodes according to an embodiment of the present application;

fig. 3 is a schematic diagram of an arrangement of an infrared light emitting diode and a white light emitting diode according to an embodiment of the present application.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first", "second", and the like in the description and claims of the present invention 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 is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. 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.

For a better understanding of the embodiments of the present invention, some technical terms or nouns that may be related to the present invention are now explained as follows:

displaying the business: english translation to "Commercial display" means a Commercial display, which is collectively called "Commercial liquid crystal display". The products are mainly applied to business scenes, such as: the liquid crystal advertising machine, the touch all-in-one machine, the liquid crystal splicing screen, the teaching touch all-in-one machine, the electronic class board, the intelligent conference panel, the AI advertising machine, the customized business display and the like belong to the business display category.

open cell: the "open cell" in the liquid crystal display panel means a "liquid crystal panel". The main components of a liquid crystal screen are composed of two parts: 1. a backlight source; 2. a liquid crystal panel. The liquid crystal panel is only one component of the liquid crystal panel.

A liquid crystal display screen: liquid Crystal Displays (LCDs) are used in digital watches and one type of display for many portable computers. The LCD display uses two sheets of polarized material with a liquid crystal solution between them. When current is passed through the liquid, the crystals will rearrange so that light cannot pass through them. Thus, each crystal acts like a louver, both allowing light to pass through and blocking light. Liquid Crystal Display (LCD) technology information products are now developed toward the goals of being light, thin, short, and small, and it is certainly no exception to display products having a long history in the computer periphery. Under the precondition of easy carrying and transportation, the conventional display methods such as CRT video display and LED display are all limited by the factors of too large volume or huge power consumption, which cannot meet the practical requirements of users. The development of the liquid crystal display technology is just in line with the trend of the current information products, and the user can enjoy the best visual environment no matter the advantages of right-angle display, low power consumption, small volume, zero radiation and the like.

Infrared ray: infrared (IR) is an electromagnetic wave with a frequency between microwave and visible light, and has a wavelength between 760nm (nanometers) and 1mm (millimeters). It is invisible light with a lower frequency than red light. In english, the prefix nfra means "below, at …". Substances above absolute zero (0K, i.e., -273.15 ℃) can all produce infrared radiation. Modern physics is called heat rays. Medical infrared rays can be divided into two categories: near infrared rays and far infrared rays. Containing heat energy, the heat of the sun is mainly transferred to the earth through infrared rays. We call the radiation outside the red infrared rays (ultraviolet rays outside the violet rays) invisible to the naked eye.

Fig. 1 is a display device according to an embodiment of the present application, as shown in fig. 1, the device including:

a back plate 12, a light bar is arranged on the surface of the back plate, wherein a white light emitting diode 1200 and an infrared light emitting diode 1202 are arranged on the light bar 120;

the reflector 14 is positioned above the back plate 12 and used for reflecting light emitted by the light bar 120;

and a diffusion plate 16, wherein the diffusion plate 16 is located above the reflective sheet 14 and is used for diffusing the light emitted by the light bar 120.

In the display device, a light bar 120 is arranged on the surface of a back plate 12, wherein a white light emitting diode 1200 and an infrared light emitting diode 1202 are arranged on the light bar 120; the reflector 14 is located above the back plate 12 and used for reflecting light emitted by the light bar 120, and the diffuser 16 is located above the reflector 14 and used for diffusing light emitted by the light bar 120, and the light is invisible to naked eyes by utilizing infrared light emission, and the infrared light emission is identifiable by the shooting device, so that the effect of interfering the shooting device to shoot is achieved, and the technical problems that the display device in the related art cannot limit the shooting device with the shooting function to shoot secretly and the content displayed on the display device is leaked are solved.

The above-mentioned photographing devices include, but are not limited to: the mobile terminal with the photographing function, the camera, the tablet computer and the like, wherein the display device includes but is not limited to: commercial display machines, large screen complete machines and other display screens.

In an alternative embodiment of the present invention, the white light emitting diode 1200 and the infrared light emitting diode 1202 respectively use different power driving circuits.

In practical application scenes, when the photographing action of a viewer is not detected, only the white light emitting diode is driven and lightened by the driving circuit of the white light emitting diode, and when the candid action of the viewer is detected, the infrared light emitting diode is lightened by the driving circuit of the infrared light emitting diode, at this time, because the infrared rays emitted by the infrared light emitting diode are invisible to naked eyes, and the electrons with the photographing function can identify the infrared rays, the contents displayed on the display device are not influenced to be continuously read or appreciated by the on-site viewer, and because the photographing devices such as a mobile terminal with the photographing function, a camera, a tablet computer and the like can identify the infrared rays, when the photographing devices are used for photographing the display device, for example, when a large-screen complete machine is photographed, all the photographed pictures are infrared rays, therefore, normal display contents cannot be captured.

It should be noted that, the above-mentioned manner of detecting the photographing action of the audience may adopt a manual observation manner or a machine recognition manner, for example, when a field administrator observes that the audience uses the mobile terminal to take a candid photograph on the display screen, the security mode may be started, that is, the infrared light emitting diode is turned on to emit infrared light, and since the infrared light may be recognized by the camera of the mobile terminal, the last photograph taken by the mobile terminal is all infrared light, and a normal picture cannot be taken. If a machine identification mode is adopted, the identification system can be connected with the drive circuit of the infrared light-emitting diode, and when the identification system identifies that the candid photograph action exists, the drive circuit of the infrared light-emitting diode can be directly triggered to light the red infrared light-emitting diode.

In some optional embodiments of the present invention, the display device further comprises: an optical film assembly 18 for improving optical shielding, the optical film assembly 18 being located above the diffuser plate 16, it is easy to note that the optical film assembly 18 is composed of at least two films.

It should be noted that, in order to reduce backlight unit's thickness and cost, the utility model discloses a be the optics diaphragm combination, the characteristics of optics diaphragm are that the surface is smooth, and the interface between the rete is the geometry and cuts apart, and the refracting index of rete can take place the jump on the interface, nevertheless can be continuous in the rete, can be transparent medium, also can be the absorption medium, can be normal direction even, also can be normal direction inhomogeneous, the utility model discloses the optics of the application in the relevant embodiment grinds the skin and is more complicated than ideal thin slice.

As shown in fig. 2, in some optional embodiments of the present invention, in order to ensure that the light emitted from the infrared leds 1202 has no blank area, the ratio of the cavity height to the half distance between the adjacent infrared leds 1202 on the light bar 120 is smaller than the tangent value of the emission angle of the infrared leds 1202, wherein the cavity height refers to the vertical distance from the light emitting surface of the infrared leds 1202 to the optical film assembly 18. For example, if the cavity height is h, the emission angle of the infrared light emitting diodes 1202 is a, and the distance between two adjacent infrared light emitting diodes 1202 on the light bar 120 is l, tan a is greater than or equal to h/l.

In an optional embodiment of the present invention, the display device further includes a liquid crystal panel open cell20, the liquid crystal panel 20 is located above the optical film assembly 18, and in addition, in order to protect the liquid crystal panel 20, a tempered glass 22 for protecting the liquid crystal panel 20 is further disposed on the liquid crystal panel 20.

In some optional embodiments of the present invention, the display device further comprises a front frame or a fixing glue for functioning as a fixing component, wherein the front frame or the fixing glue is used for fixing the back plate 12, the reflective sheet 14, the diffusion plate 16, the optical film assembly 18, the liquid crystal panel 20 and the tempered glass 22.

In some optional embodiments of the present invention, the reflecting sheet 14 is provided with a through hole 140 for exposing the white light emitting diode 1200 and the infrared light emitting diode 1202.

It should be noted that the through holes 140 corresponding to the white light emitting diodes 1200 and the white light emitting diodes 1200 are in one-to-one correspondence, and the through holes 140 corresponding to the infrared light emitting diodes 1202 are in one-to-one correspondence.

In some optional embodiments of the present invention, the plurality of white leds 1200 may share one through hole, and the plurality of infrared leds 1202 may share one through hole.

As shown in fig. 3, in some optional embodiments of the present invention, the first light bar 122 where the white light emitting diode 1200 is located and the second light bar 124 where the infrared light emitting diode 1202 is located are spaced apart from each other on the back plate 12, the light bar 120 is further provided with a connection terminal 1204, the connection terminal 1204 is connected to the power panel through a wire, and it should be noted that the light bar 120 includes the first light bar 122 and the second light bar 124.

It should be noted that, the utility model discloses in the quantity of first lamp strip 122 and second lamp strip 124 can be confirmed by display device's area size, wherein, the bigger lamp strip that the area is more, and first lamp strip 122 and second lamp strip 124 can be transversely placed at a distance from, also can vertically place at a distance from. The first light bar 122 and the second light bar 124 may share one connection terminal, and may also respectively adopt two connection terminals.

The utility model discloses some optional embodiments, when first lamp strip 122 and second lamp strip 124 horizontal interval were placed or vertical interval was placed, all can place according to following mode: the second light bars 124 may be disposed at intervals of two or more first light bars 122, for example, 3 first light bars 122 may be disposed between the adjacent second light bars 124.

The number of the first light bars 122 disposed between the adjacent second light bars 124 may be determined by the security level of the display device, for example, the security level of the display device is higher, and in order to ensure that a better interference effect is achieved and more intensive infrared light is required, the number of the first light bars 122 disposed between the adjacent second light bars 124 is set to 1.

It is easy to note that, in addition to reducing the number of the first light bars 122 disposed between the adjacent second light bars 124, the number of the infrared light emitting diodes 1202 on the second light bar 124 where the infrared light emitting diodes 1202 are disposed may also be increased, for example, the second light bar 124 is only provided with 60 infrared light emitting diodes 1202, in order to achieve emission of denser infrared light and guarantee a higher interference effect, more infrared light emitting diodes 1202 such as 120 or 160 may be disposed on the second light bar 124, and the specific number is not limited, and may be set according to a use scene.

It should be noted that, in some optional embodiments of the present invention, the first light bar 122 and the second light bar 124 can be placed by adopting the horizontal placement and the vertical placement at the same time, and the specific placement mode can refer to the above-mentioned horizontal placement or the vertical placement at the intervals, which is not described herein again.

In some optional embodiments of the present invention, the first light bar 122 can be used to place two types of LEDs, i.e. white light LEDs 1200 and infrared LEDs 1202, for example, 4 LEDs are disposed on the first light bar 122, two of the LEDs are white light LEDs, and two are infrared LEDs, wherein the power-on modes of the white light LEDs 1200 and the infrared LEDs 1202 include: different connecting terminals are connected to the power panel through wires, and the same connecting terminals can also be connected to the power panel through wires.

It is easy to note that when the white light emitting diode 1200 and the infrared light emitting diode 1202 are connected to the power board by wires using the same connection terminals, the light emitting states of the white light emitting diode 1200 and the infrared light emitting diode 1202 are kept consistent, for example, the white light emitting diode 1200 is turned on, and the infrared light emitting diode 1202 is necessarily turned on at the same time; the white light emitting diode 1200 is extinguished and the infrared light emitting diode 1202 is necessarily extinguished at the same time. It will be appreciated that when the white light emitting diodes 1200 and the infrared light emitting diodes 1202 are energized in this manner, the content displayed by the display device will always be protected from being pirated.

The utility model discloses some optional embodiments, when white light emitting diode 1200 and infrared emitting diode 1202 adopt the same binding post to be connected to the power strip through the wire rod and carry out the circular telegram, in order to reach the infrared light that the emission is more intensive, guarantee higher interference effect, then can set up two or more than two infrared emitting diode 1202 at every interval white light emitting diode 1200 on first lamp strip 122, for example, every interval white light emitting diode 1200 sets up two infrared emitting diode 1202 on first lamp strip 122, at this moment, first lamp strip 122 emitting diode's arrangement order is red, white, red.

It is easy to note that when the white light emitting diode 1200 and the infrared light emitting diode 1202 are connected to the power board by wires using different connection terminals, the light emitting states of the white light emitting diode 1200 and the infrared light emitting diode 1202 may not be uniform, for example, only the white light emitting diode 1200 may be selected to be turned on without turning on the infrared light emitting diode 1202, it is understood that the number of the infrared light emitting diodes 1202 to be turned on may be determined by the security level of the display device, when the security level of the display device is higher, denser infrared light is required, at this time, the infrared light emitting diodes 1202 may be all turned on, and when the security level of the display device is lower, in order to save power consumption while placing a candid photograph.

The wire may be a copper wire, an aluminum wire, or the like.

In some optional embodiments of the present invention, the above-mentioned back plate 12 may be formed by metal processing, for example, the back plate may be formed by sheet metal processing.

The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.

In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit may be a division of a logic function, and an actual implementation may have another division, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or may not be executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be provided in one place, or may be distributed over a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (12)

1. A display device, comprising:

the LED lamp comprises a back plate, wherein a light bar is arranged on the surface of the back plate, and a white light emitting diode and an infrared light emitting diode are arranged on the light bar;

the reflector plate is positioned above the back plate and used for reflecting light emitted by the light bar;

and the diffusion plate is positioned above the reflection sheet and used for diffusing the light emitted by the light bar.

2. The display device according to claim 1, wherein the light bar is provided with a connection terminal, and the connection terminal is connected to a power panel through a wire.

3. The display device according to claim 1, wherein the white light emitting diode and the infrared light emitting diode respectively use different power driving circuits.

4. The display device according to claim 1, further comprising: and the optical film combination is used for improving the optical shielding property and is positioned above the diffusion plate, and the optical film combination at least consists of two films.

5. The display device of claim 4, wherein a ratio of a cavity height to a half distance between adjacent ones of the infrared light emitting diodes on the light bar is less than a tangent of an emission angle of the infrared light emitting diodes, wherein the cavity height is a vertical distance from a light emitting surface of the infrared light emitting diodes to the optical film assembly.

6. The display device according to claim 4, further comprising: the liquid crystal panel is located above the optical film combination, and tempered glass used for protecting the liquid crystal panel is arranged above the liquid crystal panel.

7. The display device according to claim 6, further comprising one of: the front frame or the fixing glue is used for fixing the back plate, the reflecting sheet, the diffusion plate, the optical film combination, the liquid crystal panel and the toughened glass.

8. The display device according to claim 1, wherein a through hole for exposing the white light emitting diode and the infrared light emitting diode is provided on the reflective sheet.

9. The display device according to claim 8,

the white light emitting diodes and the through holes corresponding to the white light emitting diodes are in one-to-one correspondence;

the infrared light emitting diodes and the through holes corresponding to the infrared light emitting diodes are in one-to-one correspondence.

10. The display device of claim 1, wherein the white light emitting diodes and the infrared light emitting diodes are spaced apart on the back plate.

11. The display device according to claim 10, wherein the first light bar with the white light emitting diodes and the second light bar with the infrared light emitting diodes are arranged on the back plate at intervals.

12. The display device of claim 1, wherein the backplane is machined from metal.

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