WO2019218109A1

WO2019218109A1 - Liquid crystal display screen device for recognizing interactive article, and method for recognizing interactive article therefor

Info

Publication number: WO2019218109A1
Application number: PCT/CN2018/086687
Authority: WO
Inventors: 曾宏; 陈永新; 李振全
Original assignee: 深圳盈天下视觉科技有限公司
Priority date: 2018-05-14
Filing date: 2018-05-14
Publication date: 2019-11-21

Abstract

Provided in the present invention is a liquid crystal display screen device for recognizing an interactive article, which falls within the field of image recognition. The device comprises a protection layer, a liquid crystal display layer and a backlight source from top to bottom. The backlight source comprises a PCB bottom plate, wherein the PCB bottom plate is provided with a visible-light LED lamp, an infrared light-supplementation LED lamp and an infrared camera for recognizing a pattern. A light-uniformizing membrane layer, which is used for uniformizing light emitted by the visible-light LED lamp and the infrared light-supplementation LED lamp, is provided above the PCB bottom plate, and the light-uniformizing membrane layer is provided with a through hole corresponding to the infrared camera. Compared with the prior art, according to the liquid crystal display screen device and the method for recognizing an interactive article therefor, where an interactive article is closely attached to a screen, light emitted by the infrared light-supplementation LED lamp passes through the light-uniformizing membrane layer and the liquid crystal display layer to irradiate the interactive article with a graphical code, and information of the graphical code is read by the infrared camera, and the position is tracked in real time on the screen; moreover, light emitted by the visible-light LED lamp is uniformized by the light-uniformizing membrane layer, so as to display the content of the liquid crystal screen normally.

Description

Title of Invention: Liquid Crystal Display Device for Identifying Interactive Objects and Method of Identifying Interactive Objects

Technical field

[0001] The present invention relates to the field of image recognition, and more particularly to a liquid crystal display device for identifying interactive objects and a method for identifying interactive objects.

Background technique

[0002] There are two existing schemes for identifying interactive objects: The most common one is a projection scheme, where the projector and the infrared camera are placed behind the rear projection screen, and the projected content is displayed before the rear projection screen, when there is an object to be recognized. When the screen surface is close to the screen, the infrared camera can capture the image of the identifier, thereby realizing the image recognition and tracking. The main disadvantages of the scheme are general display effect, poor light resistance, and need for a large rear projection space. difference. The other is a capacitive touch base based on a capacitive touch screen. The base is preset with different touch point combinations. Through the setting of the program, these touch point combinations are some custom objects. The base is then carried with an identifier to realize the recognition of the object. The main disadvantage of the solution is that it can only be used as a demonstration, because he cannot capture graphics other than the preset. Due to the limitations of the touch film technology, when the identification is relatively large, The base will be larger, which will affect the demo experience.

Summary of invention

technical problem

Problem solution

Technical solution

[0003] In view of the above problems, the present invention provides a liquid crystal display device for recognizing an interactive object, such as a two-dimensional code, a barcode, and the like, which can be read and on the screen in the case of being in close contact with the screen. The position is tracked in real time, and it can display the contents of the LCD screen normally.

[0004] The technical solution adopted by the present invention is:

[0005] A liquid crystal display device for identifying an interactive object includes a top-down protective layer, a liquid crystal display layer, and a backlight. The backlight includes a PCB bottom plate, and a visible light LED lamp is distributed on the PCB bottom plate. The light LED lamp and the infrared camera for recognizing the pattern, the top layer of the PCB is provided with a homogenizing film layer for homogenizing the light emitted by the visible LED lamp and the infrared complementary LED lamp, and the uniform film layer is provided with infrared The through hole corresponding to the camera.

[0006] Preferably, the light homogenizing film layer comprises a light homogenizing sheet disposed above the PCB bottom plate and a light homogenizing film disposed on the light homogenizing sheet, and the through hole is disposed on the light homogenizing sheet.

[0007] Preferably, the protective layer is tempered glass.

The present invention also provides a method for identifying an interactive object by a liquid crystal display device, comprising the following steps:

[0009] 1) an interactive object having a graphic code is placed in front of a protective layer of the liquid crystal display layer;

[0010] 2) the visible light LED lamp and the infrared fill light LED lamp on the PCB bottom plate emit light;

[0011] 3) The light emitted by the visible light LED lamp is homogenized by the homogenizing film layer to provide a backlight for the liquid crystal display layer, and the visible light reflected by the liquid crystal display layer is reused in the homogenizing film layer backlight; the infrared fill light LED lamp is emitted The light is sequentially irradiated through the homogenizing film layer, the liquid crystal display layer and the protective layer on the graphic code of the interactive object;

[0012] 4) The light generating reflection of the illumination recognition pattern code is collected by the infrared camera and identifies the image information of the graphic code

[0013] Preferably, the light-homogenizing film layer is provided with a through hole corresponding to the infrared camera.

[0014] More preferably, the light-homogenizing film layer comprises a light-shielding sheet disposed above the PCB substrate and a light-homogenizing film disposed above the light-shading sheet, and the through hole is disposed on the light-shading sheet.

Advantageous effects of the invention

Beneficial effect

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a liquid crystal display device and a method for recognizing an interactive object thereof, wherein the interactive object is in infrared light-filled LED when it is in close contact with the screen. The light emitted by the lamp illuminates the pattern having the graphic code through the liquid crystal display layer, the graphic code information is read by the infrared camera, and the position is tracked in real time on the screen, and at the same time, the light emitted by the visible light LED lamp is homogenized by the uniform film layer. This will display the contents of the LCD screen normally.

Brief description of the drawing

DRAWINGS

1 is a schematic diagram of a liquid crystal display device for identifying an interactive object according to the present invention;

2 is a light path of a liquid crystal display layer in a liquid crystal display device for identifying an interactive object according to the present invention; Schematic diagram

3 is a schematic diagram of an optical path of an infrared fill LED lamp in a liquid crystal display device for identifying an interactive object according to the present invention;

4 is a schematic diagram of an optical path of an infrared camera receiving light in a liquid crystal display device for identifying an interactive object according to the present invention.

Invention embodiment

Embodiments of the invention

[0020] The preferred embodiments provided by the present invention are specifically described in accordance with the accompanying drawings.

1 to FIG. 4 show a preferred embodiment of a liquid crystal display device for identifying an interactive object according to the present invention. As shown in FIG. 1 to FIG. 4, the liquid crystal display device includes a top-down protective layer 10, a liquid crystal display layer 20, and a backlight 30. The backlight 30 includes a PCB bottom plate 31, and is distributed on the PCB bottom plate 31. There are a visible light LED lamp 32, an infrared fill light LED lamp 33, and an infrared camera 34 for identifying a pattern. Above the PCB bottom plate 31, a uniform film for homogenizing the light emitted from the visible light LED lamp 32 and the infrared fill light LED lamp 33 is provided. The layer 35, the uniform film layer 35 is provided with a through hole 3501 corresponding to the infrared camera 34, so that when the interactive object having the graphic code is in close contact with the protective layer 10 of the liquid crystal display layer 20, the visible light on the PCB substrate 31 The LH) lamp 32 and the infrared fill LED lamp 33 emit light, and the light emitted from the infrared fill LED lamp 33 has strong penetrating characteristics, and sequentially passes through the light homogenizing film layer 35, the liquid crystal display layer 20, and the protective layer 10. Directly illuminating on the graphic code 101 of the interactive object 100, and the image information of the identification graphic code is collected by the infrared camera 24 that is reflected by the through hole 3501; and the visible light emitted by the visible light LED 32 is less penetrating. Attenuation occurs on the uniform film layer 35, so that the energy is converted to the light-homogenizing film layer 35 to be brightened, as a light source of the liquid crystal display layer 20, and the observer can be prevented from observing other structural components behind the light-homogenizing film layer 35, The observer will see a display effect like a normal LCD screen, and in terms of surface appearance, no device, such as an infrared touch frame, a nano touch film, a capacitive touch film, an active tag, etc. Implementing the identification of the interactive object 100. The graphic code 101 on the bottom surface of the interactive object 100 is generally a two-dimensional code or a barcode, and is printed by paper carbon ink.

[0022] The light homogenizing film layer 35 includes a light homogenizing sheet 351 disposed above the PCB bottom plate 31 and a light homogenizing film 352 disposed above the light homogenizing sheet. The through hole 3501 is disposed on the light homogenizing sheet 351, and the infrared camera 34 is provided. The infrared rays reflected from the graphic code of the interactive object 100 are received through the through holes 3501 on the light homogenizing sheet 351. [0023] It should be noted that the light emitted by the visible light LED lamp belongs to the visible spectrum range; the infrared fill light LED lamp may be an infrared light of different wavelength ranges; the infrared camera may be other infrared cameras of different wavelength ranges; . The protective layer 10 is made of tempered glass; the light homogenizing sheet 351 is made of PS (polystyrene), PMMA (polymethyl methacrylate), PC (polycarbonate), PP (polypropylene), PVC ( Polyvinyl chloride), PET (polyester resin) and other materials are formed; the homogenizing film 352 is made of PS (polystyrene), PMMA (polymethyl methacrylate), PC (polycarbonate), PP (polypropylene) ), PV C (polyvinyl chloride), PET (polyester resin) and other materials are formed.

[0024] The present invention also provides a method for identifying an interactive object by a liquid crystal display device, comprising the following steps:

[0025] 1) an interactive object 100 having a graphic code 101 is placed in front of the protective layer 10 of the liquid crystal display layer 20;

[0026] 2) the visible light LED lamp 32 and the infrared fill light LED lamp 33 on the PCB bottom plate 31 emit light;

[0027] 3) The light emitted by the visible light LED lamp 32 is homogenized by the light-homogenizing film layer 34 to provide a backlight for the liquid crystal display layer 20, and the visible light reflected by the liquid crystal display layer 20 is backlit and reused in the light-homogenizing film layer 35; The light emitted by the fill light LED lamp 33 sequentially passes through the light homogenizing film layer 34, the liquid crystal display layer 20 and the protective layer 10 to illuminate the graphic code 101 of the interactive object 100;

[0028] 4) The light-reflecting of the illumination pattern code 101 is acquired by the infrared camera 35 and the image information of the graphic code 101 is recognized.

[0029] The light-homogenizing film layer 35 is provided with a through hole 3501 corresponding to the infrared camera 34. The light homogenizing film layer 35 includes a light homogenizing sheet 351 disposed above the PCB bottom plate 31 and a light homogenizing film 352 disposed above the light homogenizing sheet 351. The through hole 3501 is disposed on the light homogenizing sheet 351, and the infrared camera 34 passes through The through hole 3501 on the light homogenizer 351 receives infrared rays reflected from the graphic code of the interactive object 100.

[0030] In summary, the technical solutions of the present invention can fully and effectively achieve the above objects, and the structural and functional principles of the present invention have been fully verified in the embodiments, and can achieve the expected effects and purposes. Many changes or modifications may be made to the embodiments of the invention without departing from the spirit and scope of the invention. Accordingly, the present invention includes all alternatives which are within the scope of the patent application, and any equivalent changes made within the scope of the present invention are within the scope of the patent application.

Claims

Claim

[Claim 1] A liquid crystal display device for identifying an interactive object, comprising a top-down protective layer, a liquid crystal display layer, and a backlight, wherein: the backlight comprises a PCB bottom plate, and the PCB bottom plate is distributed A visible light LED lamp, an infrared fill light LED lamp, and an infrared camera for recognizing a pattern, and a homogenizing film layer for homogenizing light emitted from the visible light LED lamp and the infrared fill light LED lamp is disposed above the PCB substrate, and the uniformizing film is provided. A through hole corresponding to the infrared camera is disposed on the layer.

[Claim 2] The liquid crystal display device for identifying an interactive object according to claim 1, wherein

The uniformized film layer includes a light homogenizing sheet disposed above the PCB substrate and a light homogenizing film disposed on the light homogenizing sheet, and the through hole is disposed on the light homogenizing sheet.

[Claim 3] The liquid crystal display device for identifying an interactive object according to claim 1, wherein

: The protective layer is tempered glass.

[Claim 4] A method for identifying an interactive object by a liquid crystal display device according to any one of claims 1 to 3, comprising the steps of:

1) an interactive object having a graphic code is placed in front of the protective layer of the liquid crystal display layer;

2) visible light LED light and infrared fill light LED light on the PCB bottom plate emit light;

3) The light emitted by the visible light LED is homogenized by the homogenizing film layer to provide backlight for the liquid crystal display layer

The visible light reflected by the liquid crystal display layer is reused in the backlight layer of the homogenizing film; the light emitted by the infrared complementary LED lamp sequentially passes through the uniformizing film layer, the liquid crystal display layer and the protective layer to illuminate the graphic code of the interactive object ;

4) The light that reflects the recognition pattern code reflects the image information that is captured by the infrared camera and identifies the graphic code.

[Claim 5] The method for recognizing an interactive object according to the liquid crystal display device according to claim 4, wherein: the light-receiving film layer is provided with a through hole corresponding to the infrared camera.

[Claim 6] The method for recognizing an interactive object according to the liquid crystal display device of claim 5, wherein: the light homogenizing film layer comprises a light homogenizing sheet disposed above the bottom plate of the PCB and disposed above the light homogenizing sheet The uniform film, the through hole is set on the light homogenizer.