CN113589589A

CN113589589A - Display device

Info

Publication number: CN113589589A
Application number: CN202110822742.2A
Authority: CN
Inventors: 刘梅
Original assignee: Wuhan China Star Optoelectronics Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Technology Co Ltd
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2021-11-02
Anticipated expiration: 2041-07-21
Also published as: CN113589589B

Abstract

The embodiment of the invention discloses a display device; the display device comprises a display panel and a backlight module positioned on one side of the display panel; the backlight module comprises: a backlight unit provided with a backlight hole; a first light source part disposed around the backlight hole, the first light source part for guiding a light beam entering the first light source part to an area of the display panel corresponding to the backlight hole; the first optical component is arranged in the backlight hole and comprises at least one convex lens; according to the embodiment of the invention, the first optical component comprising at least one convex lens is arranged between the display panel and the first light-emitting component in the opening display area, and the light rays emitted by the first light source component arranged around the backlight hole are focused by the convex lens, so that after passing through the first optical component, the relative parallelism of the light rays emitted out of the display device can be improved, the distribution uniformity of the emitted light rays is improved, and the display effect of the opening display area is improved.

Description

Display device

Technical Field

The invention relates to the field of display, in particular to a display device.

Background

In recent years, have optical module and trompil display area can show under the screen display device more and more receive people's liking, backlight unit in the trompil display area adopts the backlight hole, shows through setting up the light source at the backlight hole side, because the angle of light is inconsistent, trompil display area edge is compared with the center, and the light luminance of shooing is inconsistent, leads to the uneven technical problem of trompil display area luminance.

Therefore, a display device is needed to solve the above technical problems.

Disclosure of Invention

The embodiment of the invention provides a display device, which can solve the technical problem that the brightness of emitted light is inconsistent and the brightness of the emitted light is uneven in an opening display area when the edge and the center of the opening display area are compared at present.

The embodiment of the invention provides a display device, which comprises a display panel and a backlight module positioned on one side of the display panel; wherein, backlight unit includes:

a backlight unit provided with a backlight hole;

a first light source part disposed around the backlight hole, the first light source part for guiding a light beam entering the first light source part to an area of the display panel corresponding to the backlight hole; and

the first optical component is arranged in the backlight hole and comprises at least one convex lens.

In an embodiment, the first optical member includes a plurality of convex lenses, and the first image side focal lengths of the convex lenses are gradually reduced in a direction from an edge of the backlight hole to a center of the backlight hole.

In one embodiment, the thickness of the convex lens gradually increases in a direction from an edge of the backlight hole to a center of the backlight hole.

In one embodiment, the refractive index of the convex lens gradually increases in a direction from an edge of the backlight hole to a center of the backlight hole.

In an embodiment, the backlight module further includes a second optical member disposed in the backlight hole and an optical module, the second optical member is located between the optical module and the first optical member, and the second optical member includes at least one concave lens.

In an embodiment, the second optical member includes a plurality of concave lenses, and the second image focal length of the concave lenses is gradually decreased in a direction from the edge of the backlight hole to the center of the backlight hole.

In one embodiment, the depth of the concave lens gradually increases in a direction from an edge of the backlight hole to a center of the backlight hole.

In one embodiment, the first optical component includes a plurality of convex lenses, and the second optical component includes a plurality of concave lenses, and an image side focal point of the convex lens on a side close to the optical module coincides with an image side focal point of the concave lens on a side close to the optical module.

In one embodiment, an orthographic projection of the second optical component on the first optical component is located within the first optical component, and an orthographic projection of the optical module on the second optical component is located within the second optical component.

In an embodiment, the backlight module further includes a light reflecting member located in the backlight hole, the light reflecting member is located between the second optical member and the first light source member, and the light reflecting member is configured to reflect the light emitted from the first light source member to the second optical member to the first optical member.

According to the embodiment of the invention, the first optical component comprising at least one convex lens is arranged between the display panel and the first light-emitting component in the opening display area, and the light rays emitted by the first light source component arranged around the backlight hole are focused by the convex lens, so that after passing through the first optical component, the relative parallelism of the light rays emitted out of the display device can be improved, the distribution uniformity of the emitted light rays is improved, and the display effect of the opening display area is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a first structure of a display device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second structure of a display device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a third structure of a display device according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a fourth structure of a display device according to an embodiment of the present invention;

FIG. 5 is a schematic top view of a portion of a fifth structure of a display device according to an embodiment of the invention;

fig. 6 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention. Furthermore, it should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, and are not intended to limit the present invention. In the present invention, unless otherwise specified, the use of directional terms such as "upper" and "lower" generally means upper and lower in the actual use or operation of the device, particularly in the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.

Referring to fig. 1 to 5, an embodiment of the invention provides a display device 100, including a display panel 200 and a backlight module located at one side of the display panel 200; wherein, backlight unit includes:

a backlight unit 300 having a backlight hole 310;

a first light source part 400 disposed around the backlight hole 310, the first light source part 400 for guiding a light beam entering the first light source part 400 to an area of the display panel 200 corresponding to the backlight hole 310; and

the first optical member 500 is disposed in the backlight hole 310, and the first optical member 500 includes at least one convex lens 510.

In the embodiment of the present invention, the first optical member 500 including at least one convex lens 510 is disposed between the display panel 200 and the first light emitting member in the open display area, and the light emitted by the first light source member 400 disposed around the backlight hole 310 by using the light condensing principle of the convex lens 510 is passed through the first optical member 500, so that the relative parallelism of the light exiting from the display device 100 can be improved, the distribution uniformity of the exiting light can be improved, and the display effect of the open display area can be improved.

The technical solution of the present invention will now be described with reference to specific embodiments.

The display device 100 includes a display panel 200 and a backlight module located at one side of the display panel 200; wherein, backlight unit includes: a backlight unit 300 having a backlight hole 310; a first light source part 400 disposed around the backlight hole 310, the first light source part 400 for guiding a light beam entering the first light source part 400 to an area of the display panel 200 corresponding to the backlight hole 310; and a first optical member 500 disposed in the backlight hole 310, wherein the first optical member 500 includes at least one convex lens 510.

In this embodiment, the display device 100 includes an opening display area and a first display area surrounding the opening display area, and the opening display area corresponds to the backlight hole 310.

In this embodiment, please refer to fig. 1, the light emitted by the first light source 400 is used for displaying the opening display area corresponding to the backlight hole 310, since the first light source 400 is disposed around the backlight hole 310, the exit angles of the emitted light at the center of the backlight hole 310 and the edge of the backlight hole 310 are different, which may affect the viewing experience of the user on the opening display area, the first optical component 500 includes a plurality of convex lenses 510, and the first image space focal length f1 of the convex lenses 510 is gradually decreased in the direction from the edge of the backlight hole 310 to the center of the backlight hole 310.

The edge of backlight hole 310 extremely in the direction at backlight hole 310's center, encircle backlight hole 310 light that first light source part 400 sent reachs the distance at backlight hole 310's center increases gradually, and the angle of light is also bigger and bigger, convex lens 510's refracting power strengthens gradually, is in the process behind convex lens 510, be favorable to the light perpendicular to display device 100 jets out, can improve the homogeneity of spouting of light, avoids because light jets out at a plurality of angles, can lead to showing unusually brightly when looking sideways, has improved the distribution homogeneity of spouting light, has improved the display effect in trompil display area, please participate in figure 1.

In this embodiment, referring to fig. 1, many methods are used to change the first image focal length f1 of the convex lens 510, and the thickness of the convex lens 510 gradually increases from the edge of the backlight hole 310 to the center of the backlight hole 310 in consideration of process and cost.

Change the process conditions of convex lens 510's thickness is simpler, can change convex lens 510's first image space focus f1, refractive power is stronger, and the spotlight effect is stronger more, and first image space focus f1 is less, convex lens 510's refractive power strengthens gradually, process behind convex lens 510, be favorable to the light perpendicular to display device 100 jets out, can improve the homogeneity of jetting out of light, avoids because light multi-angle jets out, can lead to showing unusually bright when looking sideways, has improved the distribution homogeneity of jet-out light, has improved the display effect in trompil display area, please participate in figure 1.

In this embodiment, please refer to fig. 1, for the more detailed display of the display area with openings, the convex lenses 510 may be relatively independent units, and the refractive index of the convex lenses 510 gradually increases from the edge of the backlight hole 310 to the center of the backlight hole 310.

Adjacent two convex lens 510's refracting index can be different, can be through changing component distribution ratio or direct change in convex lens 510's the material of convex lens 510 changes convex lens 510's refracting index can change convex lens 510's first image side focus f1, and refractive power is stronger more, and spotlight effect is stronger more, and first image side focus f1 is less, convex lens 510's refractive power strengthens gradually, is in the process behind convex lens 510, is favorable to the light perpendicular to display device 100 jets out, can improve the homogeneity of spouting of light, avoids because light multi-angle jets out, can lead to showing unusually bright when looking sideways, has improved the distribution homogeneity of jet-out light, has improved the display effect of trompil display area, please participate in figure 1.

In this embodiment, please refer to fig. 2, after the first optical member 500 is disposed, the display effect of the open-cell display area is enhanced, but when external light enters the backlight hole 310, the light is contracted due to the convex lens 510 in the first optical member 500, some optical modules 700 increase the processing difficulty after collecting the contracted light, and reduce the working performance of the optical module 700, the backlight module further includes a second optical member 600 and an optical module 700 disposed in the backlight hole 310, the second optical member 600 is located between the optical module 700 and the first optical member 500, and the second optical member 600 includes at least one concave lens 610.

The optical module 700 may be any one of a camera, a fingerprint sensor, a distance sensor, and an infrared sensor, and is not limited herein, when external light passes through the backlight hole 310, after passing through the first optical member 500, the external parallel light may converge due to the light condensing principle of the convex lens 510, which may affect the light collecting effect of the optical module 700, the second optical member 600 is disposed between the first optical member 500 and the optical module 700, and the converged light may be diverged by using the light diffusing principle of the concave lens 610, so that the more parallel light may be obtained again, which is beneficial to improving the light collecting effect of the optical module 700, please refer to fig. 2.

In this embodiment, please refer to fig. 2, the second optical component 600 includes a plurality of concave lenses 610, and in a direction from an edge of the backlight hole 310 to a center of the backlight hole 310, a second image space focal length f2 of the concave lenses 610 gradually decreases. In the direction close to the center of the backlight hole 310, more external light rays are converged later, and a stronger dispersing ability is required, the second image focal length f2 of the concave lens 610 is gradually reduced, and the light scattering ability of the concave lens 610 is gradually enhanced, so that after passing through the concave lens 610, the light rays are favorably emitted in parallel and emitted to the optical module 700, the emitting uniformity of the light rays can be improved, and the light collection effect of the optical module 700 is favorably improved.

In this embodiment, referring to fig. 2, many methods are used to change the second image focal length f2 of the concave lens 610, and the depth of the concave lens 610 gradually increases from the edge of the backlight hole 310 to the center of the backlight hole 310 in consideration of process and cost. The process condition for changing the depth of the concave lens 610 is simple, the second image space focal length f2 of the concave lens 610 can be changed, the stronger the scattering ability is, the stronger the light scattering effect is, after passing through the concave lens 610, the light rays can be emitted in parallel, and the light rays are emitted to the optical module 700, so that the emission uniformity of the light rays can be improved, and the light collection effect of the optical module 700 can be improved.

In this embodiment, please refer to fig. 2 and 4, the arrangement of the concave lens 610 and the convex lens 510 relates to two ways of converging and scattering external light, and it is required that the parameters of the concave lens 610 and the convex lens 510 are matched, the first optical component 500 includes a plurality of convex lenses 510, the second optical component 600 includes a plurality of concave lenses 610, and the image space focus of the convex lens 510 close to the optical module 700 is coincident with the image space focus of the concave lens 610 close to the optical module 700.

That is, the sum of the distance d between the convex lens 510 and the corresponding concave lens 610 and the second image focal length f2 of the concave lens 610 is equal to the first image focal length f1 of the convex lens 510, and the external parallel light rays are still parallel light rays after passing through the first optical component 500 and the second optical component 600, so that the light rays emitted to the optical module 700 are parallel light rays, which is beneficial to improving the light collection effect of the optical module 700, please refer to fig. 4.

In this embodiment, please refer to fig. 2, an orthogonal projection of the second optical component 600 on the first optical component 500 is located in the first optical component 500, and an orthogonal projection of the optical module 700 on the second optical component 600 is located in the second optical component 600. It can be guaranteed that external light can pass through first optical component 500 and behind second optical component 600, light that can be comparatively parallel gets into optical module 700, simultaneously, will second optical component 600 sets up and is less than first optical component 500 can avoid light in display device 100 with second optical component 600 produces alternately, avoids influencing the process first optical component 500's light, avoids influencing backlight hole 310 corresponds display panel 200's display area, improves the display effect.

In this embodiment, the light emitted from the first light source 400 is ideally emitted to the display panel 200 corresponding to the open display area, but the light emitted from the first light source 400 is sure to emit light to the optical module 700, the backlight module further includes a light reflecting member 800 located in the backlight hole 310, the light reflecting member 800 is located between the second optical member 600 and the first light source 400, and the light reflecting member 800 reflects the light emitted from the first light source 400 to the second optical member 600 to the first optical member 500, please refer to fig. 3. The light emitted from the first light source unit 400 can be fully utilized, the brightness of the backlight hole 310 corresponding to the display area of the display panel 200 can be increased, and the display effect can be improved.

In this embodiment, after the light reflection member 800 is disposed, the utilization rate of the light of the first light source unit 400 is improved, the display effect of the open-hole display area is enhanced, but the lighting capability of the optical module 700, that is, the receiving capability of the optical module 700 for the external light, is affected, the light reflection member 800 includes a light reflection film and a shutter unit, the shutter unit is linked with the optical module 700, the light reflection film is located on the shutter unit, when the optical module 700 needs to work, the shutter unit is opened, the external light can enter the optical module 700, when the display area of the display panel 200 corresponding to the backlight hole 310 needs to be displayed, the shutter unit is closed, the light emission film can reflect the light of the second optical component 600 from the first light source unit 400 to the first optical component 500, the shutter unit may be provided integrally with a shutter of the optical module 700 (e.g., a camera) or separately, and is not particularly limited herein.

In this embodiment, the backlight unit 300 includes a lamp panel and a light guide plate.

In this embodiment, the display panel 200 may be a liquid crystal display panel 200 or a quantum dot-color film type display panel 200, which is not limited herein. When the display panel 200 is a quantum dot-color film type display panel 200, the light emitted from the lamp panel and the first light source unit 400 is blue light.

In this embodiment, the display panel 200 located in the opening display area includes an array substrate, a liquid crystal layer located on the array substrate, a color film layer located on the liquid crystal layer, and two polarizing layers located on two sides of the liquid crystal layer.

In this embodiment, the display panel 200 in the open-hole display region includes an array substrate, a quantum dot layer on the array substrate, and a color film layer on the quantum dot layer.

In this embodiment, the array substrate may extend into the first display region, the array substrate in the first display region may have the same structure as the array substrate in the opening display region, and the array substrate includes a gate layer, an active layer, a source/drain layer, and a correspondingly disposed insulating layer, which is not described herein again.

In this embodiment, the first optical component 500 or/and the second optical component 600 includes glass or/and polycarbonate, and the convex lens 510 or/and the concave lens 610 may be a spherical lens or an aspheric lens, where the aspheric lens may further improve the flatness uniformity of light, ensure the uniformity of light for the display in the open-hole display area, improve the display effect, ensure the uniformity of the optical module 700 receiving external light, and improve the working performance of the optical module 700.

In this embodiment, the size of the convex lens 510 or/and the concave lens 610 may be 0.1mm to 5mm, and the size may be manufactured according to actual situations, and two adjacent convex lenses 510 or/and two adjacent concave lenses 610 may be in contact with each other or may be arranged at intervals, please refer to fig. 5.

In this embodiment, the light emitting frequency of the first light source unit 400 is different from the frequency of the display screen in the first display region. For example, in the existing first display region, the red sub-pixel, the green sub-pixel and the blue sub-pixel display 1 frame of image, and the red LED, the green LED and the blue LED of the first light source part 400 are sequentially turned on, each requiring one third of the frame of on-time to display one image, so the light refresh frequency of the first light source part 400 is three times that of the first display region. When the refresh frequency of the first display region is 60Hz, the refresh frequency corresponding to the first light source unit 400 is 180 Hz.

In this embodiment, the light emitting frequency of the first light source part 400 may be the same as the frequency of the display screen in the first display region. For example, the turn-on time of the red sub-pixel, the green sub-pixel and the blue sub-pixel in the existing first display area is 1 frame each, and the red sub-pixel, the green sub-pixel and the blue sub-pixel in the first display area are refreshed three times within the turn-on time of 1 frame. The red LED, the green LED, and the blue LED of the first light source part 400 are sequentially turned on, and each turn-on time of three frames is required to display one screen, so that the refresh frequency of the first light source part 400 is the same as that of the normal display area. For example, when the refresh frequency of the first display region is 180Hz, the refresh frequency of the first light source part 400 is 180 Hz.

The display is performed by outputting the refresh frequency with different frame rates or the same frame rate, so that the display image of the open pore display area is always, the continuous color image frames form continuous color images, and due to the persistence of vision of human eyes, the human eyes see the complete and smooth color image formed by three primary colors of blue, green and red, the image is clear and bright, and the display effect of the display device 100 is improved.

The first light source part 400 is used to sequentially emit red light, green light, and blue light, and a field color sequential (FSC) technique is used, so that a plurality of pixels in the display device 100 respectively corresponding to a plurality of pixel electrodes can display red, green, and blue colors in a time-division manner and overlap each other by time division, and finally, a specific color is displayed, so that a hole display area in the display device 100 can also realize color display, and the quality of a product is improved.

Referring to fig. 6, an embodiment of the present invention further provides a mobile terminal 10, including any one of the display devices 100 and the terminal body 20, where the terminal body 20 and the display device 100 are combined into a whole.

Please refer to any one of the embodiments of the display device 100 and fig. 1 to 5 for a specific structure of the display device 100, which is not described herein again.

In this embodiment, the terminal main body 20 may include a middle frame, a frame adhesive, and the like, and the mobile terminal 10 may be a mobile display terminal such as a mobile phone and a tablet, which is not limited herein.

The display device provided by the embodiment of the present invention is described in detail above, and the principle and the embodiment of the present invention are explained in detail herein by applying specific examples, and the description of the above embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A display device is characterized by comprising a display panel and a backlight module positioned on one side of the display panel; wherein, backlight unit includes:

a backlight unit provided with a backlight hole;

2. The display device according to claim 1, wherein the first optical member includes a plurality of convex lenses, and a first image side focal length of the convex lenses is gradually decreased in a direction from an edge of the backlight hole to a center of the backlight hole.

3. The display device according to claim 2, wherein the thickness of the convex lens gradually increases in a direction from an edge of the backlight hole to a center of the backlight hole.

4. The display device according to claim 2, wherein the refractive index of the convex lens gradually increases in a direction from an edge of the backlight hole to a center of the backlight hole.

5. The display device according to claim 1, wherein the backlight module further comprises a second optical member disposed in the backlight hole and an optical module, the second optical member is disposed between the optical module and the first optical member, and the second optical member comprises at least one concave lens.

6. The display device according to claim 5, wherein the second optical member includes a plurality of concave lenses, and a second image side focal length of the concave lenses is gradually decreased in a direction from an edge of the backlight hole to a center of the backlight hole.

7. The display device according to claim 6, wherein the depth of the concave lens is gradually increased in a direction from an edge of the backlight hole to a center of the backlight hole.

8. The display device according to claim 5, wherein the first optical member comprises a plurality of convex lenses, and the second optical member comprises a plurality of concave lenses, and an image side focal point of the convex lens on a side close to the optical module coincides with an image side focal point of the concave lens on a side close to the optical module.

9. A display device as claimed in claim 5, characterised in that the orthographic projection of the second optical component on the first optical component is within the first optical component and the orthographic projection of the optical module on the second optical component is within the second optical component.

10. The display device according to claim 5, wherein the backlight module further comprises a light reflecting member disposed in the backlight hole, the light reflecting member being disposed between the second optical member and the first light source member, the light reflecting member being configured to reflect the light emitted from the first light source member toward the second optical member toward the first optical member.