CN113259553A

CN113259553A - Mobile display device

Info

Publication number: CN113259553A
Application number: CN202110447121.0A
Authority: CN
Inventors: 宋力帆; 郝英俊
Original assignee: Beijing Best Color Technology Co ltd
Current assignee: Beijing Best Color Technology Co ltd
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2021-08-13

Abstract

The present invention provides a mobile display device, comprising: the device comprises a device body, a display screen arranged on one surface of the device body and a camera arranged on the same surface with the display screen; the camera comprises a lens assembly, an optical filter switching assembly and an image sensor, wherein the optical filter switching assembly comprises a switching structure, an IR-CUT optical filter and an ultraviolet band-pass optical filter, and the switching structure is used for respectively switching the IR-CUT optical filter and the ultraviolet band-pass optical filter to a position between the lens assembly and the image sensor. By the mode, the space in the equipment is saved, and the multispectral imaging image is acquired by the single image sensor under the condition that the display screen area is not occupied additionally.

Description

Mobile display device

Technical Field

The present invention relates to the field of electronic devices, and in particular, to a mobile display device.

Background

In the prior art, mobile display devices such as mobile phones or tablet computers realize functions of user self-shooting, face verification and the like through a camera capable of collecting color images. With the development of the technology and the development of application scenes, the technologies such as ultraviolet imaging and the like are effectively applied to scenes such as skin health and maintenance. If the ultraviolet imaging technology is applied to the mobile phone, the corresponding ultraviolet camera needs to be arranged at the front position of the mobile phone or the tablet personal computer, so that the imaging effect can be displayed to a user in real time through the display screen while the user collects the ultraviolet image. However, at present, the screen of the display screen of the mobile phone or the tablet computer is larger, and thus the space left for the camera on the front side of the mobile phone or the tablet computer is smaller. Therefore, if the ultraviolet camera is directly added to the position corresponding to the camera, multiple cameras exist in the camera area at the same time, the display screen area is seriously occupied, the current design aesthetics is affected, and the cost is increased.

Disclosure of Invention

In order to solve the problem of severe occupation of a display screen area, the invention provides a mobile display device, wherein a color camera of the mobile display device has an ultraviolet imaging function and occupies a small display screen area.

In order to achieve the above object, an aspect of the present invention provides a mobile display device including: the device comprises a device body, a display screen arranged on one surface of the device body and a camera arranged on the same surface with the display screen; the camera comprises a lens assembly, an optical filter switching assembly and an image sensor, wherein the optical filter switching assembly comprises a switching structure, an IR-CUT optical filter and an ultraviolet band-pass optical filter, and the switching structure is used for respectively switching the IR-CUT optical filter and the ultraviolet band-pass optical filter to a position between the lens assembly and the image sensor or a position in front of the lens assembly. .

As a preferred technical solution, the apparatus further includes: the light-emitting waveband of the ultraviolet light supplement lamp corresponds to the light transmission waveband of the ultraviolet band-pass filter, and the light supplement direction of the ultraviolet light supplement lamp is the same as the image acquisition direction of the camera.

As a preferred technical solution, the optical filter switching assembly further includes: an infrared band pass filter.

As a preferred technical solution, the apparatus further includes: the light-emitting waveband of the infrared light supplementing lamp corresponds to the light transmission waveband of the infrared band-pass filter, and the light supplementing direction of the infrared light supplementing lamp is the same as the image collecting direction of the camera.

In a preferred embodiment, the image sensor is a color image sensor, and the color image sensor includes a plurality of monochrome pixel structures, wherein each monochrome pixel has a filter layer disposed therein for reflecting or absorbing light in a wavelength band other than a target wavelength band corresponding to the filter layer in a visible light wavelength band.

Preferably, the ultraviolet band-pass filter transmits light bands including a UVA band and/or a UVB band.

As a preferred technical solution, the switching structure includes a filter supporting structure and a driving unit, and the driving unit is configured to control the filter supporting structure to move so as to implement the filter switching.

As a preferred technical scheme, the driving unit is a motor or a magnetic device.

As a preferred technical solution, one end of the optical filter bearing structure is fixed on a rotating shaft, and the driving unit drives the optical filter bearing structure to rotate around the rotating shaft to realize optical filter switching; or the optical filter bearing structure is arranged in the parallel guide rail, and the driving unit drives the optical filter bearing structure to move in parallel along the parallel guide rail so as to realize optical filter switching.

As a preferred technical solution, the mobile display device is a mobile phone or a tablet computer.

In the prior art, most cameras are color cameras with fixed IR-CUT optical filters, and although the pixels on the image sensor are provided with filter layers, the IR-CUT filters ultraviolet light and infrared light, so that the filter layers do not filter the ultraviolet light and the infrared light, that is, the pixels are sensitive to the ultraviolet light and the infrared light. The technical scheme utilizes the characteristic of the existing camera, and the device can switch the IR-CUT filter into the ultraviolet band-pass filter or the infrared band-pass filter through the switching structure, so that the effects of collecting color images and ultraviolet images and/or infrared images can be realized through one color image sensor in the prior art, the position of the camera only occupies the space of one camera, and the problem that the ultraviolet/infrared imaging device seriously occupies the area of a display screen when being integrated into a mobile phone camera is solved.

Drawings

FIG. 1 shows a schematic diagram of a mobile display device of an embodiment of the invention;

fig. 2 shows a schematic structural diagram of a camera in the prior art;

fig. 3 shows a schematic structural diagram of a camera in an embodiment of the present invention;

FIG. 4 is a schematic diagram of a filter carrier structure according to an embodiment of the invention;

FIG. 5 is a schematic diagram of a filter carrier structure according to another embodiment of the invention;

FIG. 6 is a schematic diagram of a filter carrier structure according to another embodiment of the invention;

FIG. 7 is a schematic diagram of a filter carrier structure according to another embodiment of the invention;

wherein the figures include the following reference numerals:

1. a device body; 2. a display screen; 3. a camera; 301. a lens assembly; 302. an optical filter switching assembly; 303. an image sensor; 304. a switching structure; 305. an IR-CUT filter; 306. an ultraviolet band-pass filter; 307. an infrared band-pass filter; 401. a filter carrying structure; 402. a rotating shaft; 403. parallel guide rails.

Detailed Description

The technical solution in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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 invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

An embodiment of the present invention provides a mobile display device, as shown in fig. 1, including: the device body 1, set up in display screen 2 on 1 one side of device body, with display screen 2 sets up camera 3 on the same face, display screen 2 is used for showing the image that camera 3 gathered. It should be noted that the camera 3 and the display screen 2 are disposed on the same plane, which means that the camera 3 and the display screen 2 are located on the same plane in a normal use state. For example, when the mobile display device is a variable structure device, such as a folding screen mobile phone, in a closed state, the front side is a smaller first display screen, i.e., the display screen 2, the camera 3 is disposed at the back side, when the mobile display device is in an open state, a larger second display screen is unfolded, the camera 3 and the display screen 2 are disposed at the back side of the second display screen, at this time, the device can acquire an image through the camera 3 and display the image on the display screen 2, i.e., in a normal use state, and the camera 3 is disposed on the same side as the display screen 2. Therefore, the structural arrangement scheme of the folding screen mobile phone is also within the protection scope of the invention.

In the prior art, in order to avoid occupation of a display screen area by a camera, only one color camera is usually arranged. The prior art front color camera structure is shown in fig. 2, and includes a lens assembly 301, an IR-CUT filter 306 and an image sensor 303, wherein the IR-CUT filter 306 is fixedly disposed between the lens assembly 301 and the image sensor 303. Because the front-facing color camera needs to collect a color image, but infrared light and ultraviolet light in the environment are also sensed by the image sensor 303, and further imaging of the color image is affected, the IR-CUT filter 306 functions to filter infrared light or simultaneously filter infrared light and ultraviolet light (since the image sensor is weak in ultraviolet light sensing, or only filters infrared light, color imaging can also be achieved, but infrared light and ultraviolet light are simultaneously filtered, and imaging effect of the color image is better). However, if it is desired to capture an ultraviolet image by using the ultraviolet imaging component in the mobile display device and display the image on the display screen in real time, so that the user can observe the condition of applying sun cream, or capture an infrared image by using the infrared imaging component and display the image on the display screen in real time, so that the user can observe the condition of blood vessels, the image can be obtained only by adding a corresponding ultraviolet or infrared camera at the position of the camera, and the image can occupy a large amount of the area of the display screen, thereby affecting the use of the user.

In view of the above problems, the camera head structure provided in this embodiment is as shown in fig. 3, and includes a lens component 301, a filter switching component 302 and an image sensor 303, where the filter switching component 302 includes a switching structure 304, an IR-CUT filter 305 and an ultraviolet band-pass filter 306, and the switching structure 304 is configured to switch the IR-CUT filter 305 and the ultraviolet band-pass filter 306 to a position between the lens component and the image sensor or a position before the lens component, respectively. Because the color camera in the prior art is provided with the IR-CUT optical filter, each pixel in the image sensor only needs to further filter the visible light wave band light, and each pixel can only sense the light of the corresponding color wave band. Further, the image sensor itself is also caused to be sensitive to ultraviolet light and infrared light. In the embodiment, by using the characteristic of the existing image sensor, the IR-CUT filter 305 is switched to the ultraviolet band-pass filter 306 through the switching structure 304, so that the acquisition of a color image and an ultraviolet image can be realized through one camera based on the existing image sensor. The ultraviolet imaging component does not need to be additionally designed, and the camera does not need to be additionally arranged at the position of the camera. The method is easy to realize, and can not cause excessive occupation of the display screen area.

In an optional embodiment, the apparatus further comprises: the light-emitting waveband of the ultraviolet light supplement lamp corresponds to the light transmission waveband of the ultraviolet band-pass filter, and the light supplement direction of the ultraviolet light supplement lamp is the same as the image acquisition direction of the camera.

For example, the light transmission band of the ultraviolet band-pass filter is 320-380nm, and the ultraviolet light supplement lamp can be an LED lamp bead with a central wavelength of 365 nm. Since most sunscreen creams (such as chemical sunscreen creams or physicochemical combination sunscreen creams) have the function of absorbing ultraviolet light, the smearing trace of the sunscreen cream appears black under an ultraviolet image. Therefore, through the embodiment, the user can observe the smearing effect of the self sunscreen cream through the mobile display device.

It should be noted that, since the ultraviolet light supplement lamp is used for supplementing light when the camera collects an ultraviolet image, the light supplement direction is the same as the image collection direction of the camera. Optionally, the ultraviolet light supplement lamp is arranged at a position adjacent to the camera, or at any position of the frame of the mobile display device, as long as the light supplement direction of the ultraviolet light supplement lamp is the same as the image acquisition direction of the camera. Optionally, the ultraviolet light supplement lamp may also be disposed inside the mobile display device, and when the ultraviolet light supplement lamp is needed to be used, the ultraviolet light supplement lamp is popped out from the side edge of the mobile display device through a pop-up structure (the side edge refers to any one of the upper side edge, the lower side edge, the left side edge and the right side edge of the mobile display device).

In an optional embodiment, the filter switching assembly further comprises: an infrared band pass filter. Through the embodiment, the mobile display device can collect both ultraviolet images and infrared images.

In an alternative embodiment, the mobile display device further comprises: the light-emitting waveband of the infrared light supplementing lamp corresponds to the light transmission waveband of the infrared band-pass filter, and the light supplementing direction of the infrared light supplementing lamp is the same as the image collecting direction of the camera.

For example, the light transmission band of the infrared band-pass filter is 760 and 1000nm, and the infrared light supplement lamp can be an LED lamp bead with a central wavelength of 850 nm. It should be noted that any object in the natural environment can emit infrared rays when performing heat radiation, and therefore, in a common night vision scene, an additional infrared light supplement lamp is not needed. Infrared light, which is highly transparent, can be used to observe blood vessels under the skin, but requires an additional infrared light source to illuminate the skin. Therefore, with the above-described embodiments, the user can observe the condition of his own blood vessel by moving the display device.

Optionally, the second light supplement lamp is arranged at a position adjacent to the camera, and can be arranged at any position of the frame of the mobile display device, as long as the light supplement direction of the second light supplement lamp is the same as the image acquisition direction of the camera. Optionally, the second fill-in light may also be disposed inside the mobile display device, and when the second fill-in light is needed, the second fill-in light pops up from a side edge of the mobile display device through a pop-up structure (the side edge refers to any one of the upper, lower, left, and right side edges of the mobile display device).

In an optional embodiment, the image sensor is a color image sensor, which may be a CMOS image sensor or a CCD image sensor, and the color image sensor includes a plurality of monochrome pixel structures, wherein each monochrome pixel has a filter layer disposed therein for reflecting or absorbing light in a wavelength band other than a target wavelength band corresponding to the visible light wavelength band. For example, in a color image sensor, including monochrome pixels of three colors of red (R), green (G), and blue (B), optionally, in a 2 by 2 pixel unit, a red pixel, a blue pixel, and two green pixels are respectively disposed; or, for example, in a color image sensor, a monochrome pixel with four colors of red (R), green (G), blue (B), and white (W) is included, where a white pixel means that no filter layer is disposed in the pixel structure, and optionally, a red pixel, a blue pixel, a green pixel, and a white pixel are disposed in a 2-by-2 pixel unit; alternatively, for example, in a color image sensor including monochrome pixels of four colors of cyan (C), magenta (M), yellow (Y), and black (K), optionally, a cyan pixel, a magenta pixel, a yellow pixel, and a black pixel are respectively disposed in a 2-by-2 pixel unit. The color image sensor obtains a color pixel value, such as an RBG value, of each pixel in the color image through the pixel value of the corresponding color of each pixel and the pixel values of other pixels in the neighborhood.

Further, when the IR-CUT filter is replaced by an ultraviolet band pass filter or an infrared band pass filter, each monochromatic pixel in the color image sensor can sense ultraviolet light or infrared light, that is, the pixel value of each pixel in the ultraviolet image or the infrared image can be directly obtained according to the pixel value sensed by each monochromatic pixel, and since the ultraviolet image and the infrared image are usually displayed in the form of a gray scale image, the pixel value of each pixel corresponds to the gray scale value of each pixel in the gray scale image.

In an alternative embodiment, the ultraviolet bandpass filter transmits light in a band including a UVA band and/or a UVB band.

In an alternative embodiment, the switching structure includes a filter carrying structure and a driving unit, and the driving unit is configured to control the filter carrying structure to move to realize the filter switching. Optionally, the driving unit is a motor or a magnetic attraction device.

In an alternative embodiment, as shown in fig. 4, one end of the filter supporting structure 401 is fixed on the rotating shaft 402, the IR-CUT filter 305 and the ultraviolet band pass filter 306 are disposed on the filter supporting structure 401, and the driving unit drives the filter supporting structure 401 to rotate around the rotating shaft 402 to realize filter switching.

In an alternative embodiment, as shown in fig. 5, the filter carrying structure 401 is disposed in a parallel guide 403, the IR-CUT filter 305 and the ultraviolet band pass filter 306 are disposed on the filter carrying structure 401, and the driving unit drives the filter carrying structure 401 to move along the parallel guide to realize filter switching.

Further, three filters, such as an IR-CUT filter 305, an ultraviolet band-pass filter 306, an infrared band-pass filter 307, and the like, may be further disposed in the filter carrying structure, as shown in fig. 6 and 7.

In an alternative embodiment, the mobile display device is a mobile phone or a tablet computer.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms such as "above … …", "above … …", "above … …", "above", and the like may be used herein for ease of description to describe the spatial relationship of one device or feature to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

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

Claims

1. A mobile display device, the device comprising:

the device comprises a device body, a display screen arranged on one surface of the device body and a camera arranged on the same surface with the display screen;

the camera comprises a lens assembly, an optical filter switching assembly and an image sensor, wherein the optical filter switching assembly comprises a switching structure, an IR-CUT optical filter and an ultraviolet band-pass optical filter, and the switching structure is used for respectively switching the IR-CUT optical filter and the ultraviolet band-pass optical filter to a position between the lens assembly and the image sensor or a position in front of the lens assembly.

2. The apparatus of claim 1, further comprising: the light-emitting waveband of the ultraviolet light supplement lamp corresponds to the light transmission waveband of the ultraviolet band-pass filter, and the light supplement direction of the ultraviolet light supplement lamp is the same as the image acquisition direction of the camera.

3. The apparatus of claim 1, wherein the filter switching assembly further comprises: an infrared band pass filter.

4. The apparatus of claim 3, further comprising: the light-emitting waveband of the infrared light supplementing lamp corresponds to the light transmission waveband of the infrared band-pass filter, and the light supplementing direction of the infrared light supplementing lamp is the same as the image collecting direction of the camera.

5. The apparatus of claim 1, wherein the image sensor is a color image sensor comprising a plurality of monochrome pixel structures, wherein each of the monochrome pixels has a filter layer disposed therein for reflecting or absorbing light in a wavelength band other than a target wavelength band corresponding thereto in a visible light wavelength band.

6. The device according to any one of claims 1 and 3, wherein the ultraviolet band-pass filter transmits light in a band including a UVA band and/or a UVB band.

7. The apparatus of claim 1, wherein the switching structure comprises a filter carrying structure and a driving unit, and the driving unit is configured to control the filter carrying structure to move to switch the filter.

8. The device of claim 7, wherein the driving unit is a motor or a magnetic attraction device.

9. The apparatus according to claim 8, wherein one end of the filter supporting structure is fixed on a rotating shaft, and the driving unit drives the filter supporting structure to rotate around the rotating shaft to switch the filters;

or the like, or, alternatively,

the optical filter bearing structure is arranged in the parallel guide rail, and the driving unit drives the optical filter bearing structure to move in parallel along the parallel guide rail so as to realize optical filter switching.

10. The device of claim 1, wherein the mobile display device is a cell phone or a tablet computer.