CN113467123A

CN113467123A - Display module and display device

Info

Publication number: CN113467123A
Application number: CN202110745382.0A
Authority: CN
Inventors: 陈建友; 黄建谋; 王海亮; 杨雁; 钟彩娇; 周婷; 李俊谊
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2021-10-01

Abstract

The invention discloses a display module and a display device, which comprise a backlight module and a photosensitive element, wherein the backlight module comprises a frame body, the frame body comprises a bottom plate and a side plate, the side plate surrounds to form a first hollow part, the backlight module also comprises an optical film group, the optical film group comprises a second hollow part, the orthographic projection of the first hollow part on the light-emitting surface of the backlight module is a first projection, and the distance between two end points which are farthest away from the first projection is r; the orthographic projection of the second hollow part on the light-emitting surface of the backlight module is a second projection, and the distance between two end points which are farthest away on the second projection is b; the thickness of the side plate is a along the direction that the first hollow-out part points to the optical film group; b is (r +2a), so that light leakage is reduced, light shielding glue is omitted, and the screen occupation ratio is improved; backlight unit is including being located the compensation district between curb plate and the optical film group, and the compensation district is including the light filling source, and when display module assembly was in the display state of non-sensitization state, the light filling source was opened to promote luminance homogeneity.

Description

Display module and display device

Technical Field

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

Background

In order to meet the requirement of users for high screen ratio, display panels with narrow frame and even without frame are becoming the development trend of display devices. However, in order to satisfy functions such as photographing, some functional devices such as a camera and a light sensor are required in the display device. Therefore, the frame of the backlight module is usually provided with an opening for disposing the functional device.

In the prior art, common designs include a water drop screen, a bang screen, a lifting camera, a side-sliding camera and a sliding cover full screen. However, in the current design, the light shielding glue is usually disposed between the bezel and the polarizer for fixing and preventing light leakage, but due to the existence of the light shielding glue, when the display device is in a display state, an obvious black edge exists, i.e., the bezel is larger.

Disclosure of Invention

In view of the above, the present invention provides a display module and a display device.

In a first aspect, the present invention provides a display module, including a backlight module and a photosensitive element, where the backlight module includes a frame body, the frame body includes a bottom plate and a side plate, and the side plate surrounds to form a first hollow portion; the orthographic projection of the first hollow part on the light-emitting surface of the backlight module is at least partially overlapped with the orthographic projection of the photosensitive element on the light-emitting surface of the backlight module;

the backlight module also comprises an optical film group, the optical film group is arranged in a containing space formed by the bottom plate and the side plate, the optical film group comprises a second hollow part, and the orthographic projection of the first hollow part on the light-emitting surface of the backlight module is positioned in the orthographic projection of the second hollow part on the light-emitting surface of the backlight module;

the orthographic projection of the first hollow part on the light-emitting surface of the backlight module is a first projection, and the distance between two end points which are farthest away on the first projection is r; the orthographic projection of the second hollow part on the light-emitting surface of the backlight module is a second projection, and the distance between two end points which are farthest away on the second projection is b; the thickness of the side plate is a along the direction that the first hollow part points to the optical film group;

wherein b > (r +2 a);

the backlight module comprises a compensation area, the compensation area is located between the side plate and the optical film group, the compensation area comprises a light supplementing source, and when the display module is in a non-photosensitive display state, the light supplementing source is turned on.

In a second aspect, the present invention provides a display device including the display module provided in the present application.

Compared with the prior art, the display module and the display device provided by the invention at least realize the following beneficial effects:

in the display module and the display device provided by the invention, the orthographic projection of the first hollow part on the light-emitting surface of the backlight module is a first projection, and the distance between two end points which are farthest away from the first projection is r; the orthographic projection of the second hollow part on the light-emitting surface of the backlight module is a second projection, and the distance between two end points which are farthest away on the second projection is b; the thickness of the side plate along the direction of the first hollow part pointing to the optical film group is a, wherein b > (r +2 a). Compared with the prior art, this application is favorable to reducing the light entering photosensitive element's of photosensitive element in backlight unit under the sensitization state part through the aperture of increase second fretwork portion to promote photosensitive element's sensitization function, and for prior art, cancel the design that the shading was glued, be favorable to reducing the frame under the display state of non-sensitization state, thereby promote display module's screen to account for the ratio. Meanwhile, the compensation area between the side plate and the optical film group is internally provided with the light compensating source, so that the display brightness of the compensation area is favorably improved, and the phenomenon that the brightness difference between the compensation area and other display areas is too large and the brightness is uneven is avoided.

Drawings

FIG. 1 is a schematic cross-sectional view of a display module in the prior art;

fig. 2 is a schematic top view of a display module according to the present invention;

FIG. 3 is a schematic cross-sectional view of a BB' of the display module shown in FIG. 2;

fig. 4 is a schematic view showing the first projection, the second projection and the projection of the side plate on the light-emitting surface of the backlight module;

FIG. 5(a) is a schematic view of an arrangement of light compensating sources;

FIG. 5(b) is a schematic view showing another arrangement of light compensating sources;

FIG. 5(c) is a schematic view showing another arrangement of light compensating sources;

FIG. 5(d) is a schematic view showing another arrangement of light compensating sources;

FIG. 5(e) is a schematic view showing another arrangement of light compensating sources;

FIG. 5(f) is a schematic view showing another arrangement of light compensating sources;

FIG. 6 is a schematic cross-sectional view of another BB' of the display module shown in FIG. 2;

fig. 7 is a schematic layout diagram of the first supplementary light source group and the second supplementary light source group;

FIG. 8 is a schematic cross-sectional view of another BB' of the display module shown in FIG. 2;

FIG. 9 is a schematic cross-sectional view of another BB' of the display module shown in FIG. 2;

FIG. 10 is an enlarged view of a portion of C of FIG. 2;

FIG. 11 is a schematic enlarged view of a portion C of FIG. 2;

FIG. 12 is a schematic cross-sectional view of another BB' of the display module shown in FIG. 2;

FIG. 13 is a schematic enlarged view of a portion C of FIG. 2;

FIG. 14 is a further enlarged partial view of C in FIG. 2;

FIG. 15 is a schematic view of another BB' interface of the display module shown in FIG. 2;

fig. 16 is a schematic top view of a display device according to the present invention.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: 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.

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.

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.

Referring to fig. 1, fig. 1 is a schematic cross-sectional view of a display module in the prior art. As shown in fig. 1, the liquid crystal display is a passive display. Since the lcd cannot actively emit light, a backlight module is often required to provide light for the lcd. In the prior art, the backlight module 20 ' generally includes a frame 201 ' and an optical film assembly 202 '. The frame 201 'includes a bottom plate 2011' and a sidewall 2012 ', the bottom plate 2011' and the sidewall 2012 'form an accommodation space, and the optical film group 202' is disposed in the accommodation space. In order to meet the requirements of photographing, the display module generally further includes a photosensitive element 30 ', and therefore the frame 201 ' and the optical film set 202 ' are respectively provided with a first hollow portion H ' and a second hollow portion K '. In the conventional design, the light shielding glue 50 ' is generally disposed between the backlight module 20 ' and the polarizer 40 ', so that on one hand, the backlight module 20 ' and the polarizer 40 ' can be fixed by the light shielding glue 50 ', and on the other hand, the light in the backlight module 20 ' can be prevented from entering the first hollow portion H ' through the gap, thereby affecting the normal operation of the photosensitive element 30 '. However, with such a design, under a normal display state, a significant black edge is generated, i.e., the frame is large. If the light shielding glue is not provided, since the surface of the sidewall 2012 ' close to the display panel 10 ' is not flush in actual production, a gap is inevitably formed between the sidewall 2012 ' and the polarizer, light emitted from a backlight (not shown in the figure) is diffused by conduction through the optical film set 202 ', and finally, a part of light L ' may enter the first hollow portion H ' through the gap, which finally affects the normal operation of the photosensitive element 30 '. It is understood that the photosensitive element 30 ' operates by collecting the ambient light, and the light emitted from the backlight source may affect the judgment of the photosensitive element 30 ' on the ambient light, and thus may affect the normal operation of the photosensitive element 30 '.

In order to solve the problem of light leakage in the prior art, the inventors have conducted a great deal of research and found that when the apertures of the first hollow-out portion H ' and the second hollow-out portion K ' are increased synchronously, the light flux in the first hollow-out portion H ' decreases, but the decrease is small. When the aperture of the first hollow-out part H 'is unchanged and the aperture of the second hollow-out part K' is increased, the luminous flux is obviously reduced, the light leakage improvement amplitude is obvious, and no black edge exists in the display state by adopting the method.

In view of the above, the present invention provides a display module and a display device. Embodiments of the display module and the display device provided by the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to fig. 2, fig. 3 and fig. 4, wherein fig. 2 is a schematic top view of a display module according to the present invention, fig. 3 is a schematic cross-sectional view of a BB' of the display module in fig. 2, and fig. 4 is a schematic projection view of a first projection, a second projection and a side plate on a light-emitting surface of a backlight module. The display module 100 provided by the application comprises a backlight module 20 and a photosensitive element 30, wherein the backlight module 20 comprises a frame body 201, the frame body 201 comprises a bottom plate 2011 and a side plate 2012, and the side plate 2012 surrounds to form a first hollow-out part H; the orthographic projection of the first hollow part H on the light-emitting surface of the backlight module 20 is at least partially overlapped with the orthographic projection of the photosensitive element 30 on the light-emitting surface of the backlight module 20;

the backlight module 20 further includes an optical film group 202, the optical film group 202 is disposed in the accommodating space formed by the bottom plate 2011 and the side plate 2012, the optical film group 202 includes a second hollow portion K, and an orthogonal projection of the first hollow portion H on the light-emitting surface of the backlight module 20 is located within an orthogonal projection of the second hollow portion K on the light-emitting surface of the backlight module 20;

the orthographic projection of the first hollow-out part H on the light-emitting surface of the backlight module 20 is a first projection 01, and the distance between two end points which are farthest away on the first projection 01 is r; the orthographic projection of the second hollow-out part K on the light-emitting surface of the backlight module 20 is a second projection 02, and the distance between two end points which are farthest away on the second projection 02 is b; the thickness of the side plate 2012 along the direction in which the first hollow-out portion H points to the optical film assembly 202 is a;

wherein b > (r +2 a);

the backlight module 20 includes a compensation area BK, the compensation area BK is located between the side plate 2012 and the optical film assembly 202, the compensation area BK includes a light supplement source 203, and when the display module 100 is in a display state of a non-photosensitive state, the light supplement source 203 is turned on.

It should be noted that fig. 2 only illustrates that the display module 100 is rectangular, and in some other embodiments of the present application, the display module 100 may also have other shapes, which is not limited in the present application. The position relationship of the display panel 10, the backlight module 20 and the photosensitive element 30 in fig. 3 is only an illustration, and the actual structure can refer to the structures of the display panel 10 and the backlight module 20 in the prior art, which is not specifically limited in this application. In addition, the supplementary light source 203 may be an LED lamp of a conventional size, or may be a Micro LED or a Mini LED. The shape and size of the fill-in light source 203 in fig. 3 are only schematic and do not represent actual shape and size, and those skilled in the art can select a fill-in light source 203 with a suitable shape and size according to actual requirements. In fig. 4, the first projection 01 and the second projection 02 are both illustrated as circles, and the compensation zone BK is illustrated as a ring, but in other embodiments, the first projection 01, the second projection 02, and the compensation zone BK may also be square, rectangular, and the like, which is not limited in the present application. Which will not be described in detail hereinafter.

It can be understood that the backlight module 20 includes a frame 201, and specifically, the frame 201 may be a metal frame or a plastic frame, which is not limited in this application. The frame 201 includes a bottom plate 2011 and a side plate 2012, and the bottom plate 2011 and the side plate 2012 may be integrally formed or may be connected by other methods. The side plate 2012 surrounds and forms a first hollow-out portion H, and an orthographic projection of the first hollow-out portion H on the light-emitting surface of the backlight module 20 is at least partially overlapped with an orthographic projection of the photosensitive element 30 on the light-emitting surface of the backlight module 20, so as to avoid that when the photosensitive element 30 is in a photosensitive state, the frame body 201 shields the photosensitive element 30, so that the collection of ambient light by the photosensitive element 30 is influenced, and the normal work of the photosensitive element 30 is ensured.

In addition, the backlight module 20 further includes an optical film assembly 202, and the optical film assembly 202 may include a light guide plate, a diffusion film, a brightness enhancement film, a reflective sheet (not shown), and the like, and may also include other film materials, which are not limited in this application. It is understood that the backlight assembly 20 generally includes a side-type backlight assembly and a direct-type backlight assembly. For a side-in type backlight module, a backlight source (not shown) is usually disposed at one side of the backlight module, and light emitted from the backlight source is transmitted to the whole backlight module by the light guiding function of the light guide plate. Light rays are emitted upwards after passing through the light guide plate, and part of the light rays are emitted downwards and then enter the light guide plate again after being reflected by the reflecting sheet, so that the utilization rate of the light rays is improved. The light emitted upwards is dispersed by the diffusion film and condensed by the brightness enhancement film, and finally, a light source is provided for the display panel. For the direct type backlight module, because there is a gap between the backlight source and the backlight source, the optical film set 20 is often set for light uniformization, so as to avoid the phenomenon of uneven brightness. The optical film assembly 202 is disposed in the accommodating space formed by the bottom plate 2011 and the side plate 2012, so that the frame 201 can protect the optical film assembly 202 from being scratched by external objects. The side plates 2012 can also prevent a portion of the backlight light from entering the photosensitive element 30 through the conduction of the optical film assembly 202, thereby affecting the operation of the photosensitive element 30.

Through injecing b > (r +2a) in this application, compare with current design, through the aperture of increase second fretwork portion K to improve the light leak phenomenon effectively, thereby need not set up the shading and glue, consequently under the display state of non-sensitization state, obvious black border can not appear, is favorable to reducing the frame, improves the screen and accounts for than, thereby has guaranteed display effect. The inventor found in the research process that the amount of light leaked from the photosensitive element 30 in the photosensitive state mainly includes three parts, namely, the reflected light L1 of the outgoing light from the backlight module 20 passing through the polarizer 40, the reflected light L2 of the outgoing light from the backlight module 20 passing through the lower surface of the glass, and the reflected light L3 of the outgoing light passing through the upper surface of the glass. In the present application, by increasing the aperture of the second hollow portion K, the variation amount of the reflected light L1 is most significant, and the reduction amount is the largest, and the variation amounts of the reflected lights L2 and L3 are reduced in sequence. In addition, the inventor discovers that in the existing design, the light leakage angle alpha ranges from 5 degrees to 80 degrees, and the light leakage angle alpha ranges from 45 degrees to 80 degrees along with the increase of the aperture of the second hollow-out part K, so that the effect of improving the light leakage is obvious. In addition, the inventors found that the amount of leaked light entering significantly decreases as the aperture of the second hollow portion K increases. The inventors have conducted simulation experiments and found that the luminous flux was set to 100% when b is r +2a, and the luminous flux decreased to 95% when b is 2(r +2 a); when b is 3(r +2a), the luminous flux is 85% of the existing design, which is reduced by 15%; when b is further increased to 4(r +2a), the luminous flux is reduced to 20% of the existing design, and thus, by increasing b, the light leakage phenomenon can be effectively improved, and the design of the light shielding glue can be cancelled, so that the black edge phenomenon of the display state in the non-photosensitive state, namely the frame is reduced, and the screen occupation ratio is improved.

In addition, because the aperture of the second hollow portion K is increased, the compensation area BK is further included between the side plate 2012 and the optical film assembly 202, and the light supplementing source 203 is arranged in the compensation area BK, so that when the display module 100 is in the non-photosensitive display state, the light supplementing source 203 is turned on, and the situation that the luminance of the compensation area BK is low and a dark area occurs due to the increase of the aperture of the second hollow portion K is avoided.

Referring to fig. 5(a) -5(f), fig. 5(a) -5(f) are schematic diagrams of various arrangements of light compensation sources (the light compensation sources are not filled in the drawings). It should be noted that fig. 5(a) -5(f) illustrate various arrangement manners of the light compensation sources 203, and in other embodiments, the light compensation sources 203 may be arranged in other manners as long as the light compensation effect of the compensation region BK is satisfied, which is not limited in this application. In addition, the number of the light supplement sources 203 in the figure is only an illustration, and a person skilled in the art can select an appropriate number of the light supplement sources 203 according to actual requirements by combining the size of the light supplement sources 203, the size of the compensation area BK, the cost and other factors, which is not limited in the present application. Optionally, the light supplement source 203 may select a five-sided light emitting LED, that is, except for the side close to the bottom plate 2011, the remaining sides are light emitting surfaces of the LEDs, so as to supplement light to the compensation area BK, thereby avoiding a phenomenon that the brightness of the compensation area BK is low and a dark area appears in a display state of a non-photosensitive state.

Therefore, compare with current design, the display module assembly 100 that this application provided does not have obvious black border because cancelled the design that the shading was glued under the display state of non-sensitization state, has improved the screen of display module assembly and has accounted for the ratio. Simultaneously through the aperture that increases second fretwork portion K to under the sensitization state, can improve the light leak problem in backlight unit 20 effectively, reduce light leakage light inlet quantity under the sensitization state of photosensitive element 30, avoid the light among the backlight unit 20 to get into photosensitive element 30, avoid influencing photosensitive element 30's work, thereby promote photosensitive element 30's sensitization performance.

In an embodiment of the invention, referring to fig. 2, fig. 3 and fig. 4, when the display module 100 is in the photosensitive state, the light supplement source 203 is turned off.

It can be understood that, in this embodiment, by defining to close the light compensation source 203 in the photosensitive state, the light emitted by the light compensation source 203 can be prevented from affecting the photosensitive function of the photosensitive element 30, and further, the photosensitive function of the photosensitive element 30 in the photosensitive state is improved, and the light emitted by the light compensation source 203 is prevented from affecting the collection of the ambient light by the photosensitive element 30, so as to affect the performance of the photosensitive element 30. For example, when the photosensitive element 30 is a camera, light can be prevented from entering the camera, and the quality of the picture can be prevented from being affected.

In one embodiment of the present invention, please continue to refer to FIGS. 2, 3 and 4, b ≦ 4(r +2 a).

As can be seen from the foregoing, as the aperture of the second hollow portion K increases, the amount of light leaked and entering the photosensitive element 30 in the photosensitive state decreases. However, in the photosensitive state, the fill-in light source 203 is turned off, and at this time, although part of the light emitted by the backlight source can be transmitted to the compensation area BK, the luminance of the compensation area BK is relatively lower than that of the other positions of the backlight module 20, so that in the embodiment, by limiting b to be less than or equal to 4(r +2a), it can be avoided that a user feels a large black edge in the photosensitive state, and thus the user experience is improved.

In an embodiment of the invention, please refer to fig. 6 and fig. 7, fig. 6 is a schematic cross-sectional view of a BB' of the display module in fig. 2, fig. 7 is a schematic arrangement view of the first light supplement source group and the second light supplement source group (the light supplement source is not filled in fig. 7), and fig. 2 is continued. The light supplement source 203 includes a first light supplement source group 2031 and a second light supplement source group 2032, and the first light supplement source group 2031 is located between the second light supplement source group 2032 and the side plate 2012.

It can be understood that the compensation region BK is provided with a first supplementary light source group 2031 and a second supplementary light source group 2032 along the direction in which the first hollow portion H points to the optical film group 202, that is, the compensation region BK is provided with a plurality of rows of supplementary light sources 203. When the display module is in a non-photosensitive state, the multiple rows of light supplementing sources 203 emit light simultaneously to supplement light for the compensation area BK, so that the brightness of each area of the compensation area BK tends to be consistent, and the condition of uneven brightness is avoided.

It should be noted that, in fig. 6 and fig. 7, only one first supplemental light source group 2031 and one second supplemental light source group 2032 are taken as an example, in some other embodiments of the present application, the number of the first supplemental light source group 2031 and the number of the second supplemental light source group 2032 may also be multiple, and the number of the first supplemental light source group 2031 and the number of the second supplemental light source group 2032 may be adjusted according to actual requirements.

In an embodiment of the invention, please continue to refer to fig. 6 and fig. 7, the first light supplement source group 2031 includes at least two first light supplement sources 2031a and a first gap 2033, the first gap 2033 is located between two adjacent first light supplement sources 2031a, the second light supplement source group 2032 includes a second light supplement source 2032b, the second light supplement source 2032b points to the direction of the optical film group 202 along the first hollow-out portion H, and an orthographic projection of the second light supplement source 2032b on the side plate 2012 covers the first gap 2033.

It can be understood that the first gap 2033 exists between the two first fill light sources 2031a, and when the display module 100 is in the non-photosensitive display state, the brightness at the first gap 2033 may be low, which may cause uneven brightness. Through the setting of second light filling source 2032b, make along the directional direction of optical film group 202 of first fretwork portion H, second light filling source 2032b orthographic projection on curb plate 2012 covers first clearance 2033, make first clearance 2033 department not only can carry out the light filling through two adjacent first light filling sources 2031a, can also carry out the light filling through second light filling source 2032b, thereby promote the luminance of first clearance 2033 department, make luminance homogeneous everywhere, thereby promote the display effect under the display state of non-sensitization state.

In an embodiment of the invention, referring to fig. 8, fig. 8 is a schematic cross-sectional view of another BB' of the display module shown in fig. 2, and referring to fig. 2 and fig. 7, a diffusion layer 204 is disposed on a side of the light supplement source 203 away from the bottom plate 2011.

It can be understood that, in a direction perpendicular to the light exit surface of the backlight module 20, the light supplement source 203 is disposed between the bottom plate 2011 and the diffusion layer 204, and at least a part of light emitted by the light supplement source 203 enters the display panel 10 through the diffusion layer 204. As described above, when the light supplement sources 203 are multiple, the light supplement sources 203 may not be continuously disposed, a gap exists between the light supplement sources 203 and the light supplement sources 203, the brightness at the gap may be relatively weak, and finally, when the display module 100 is in a display state, a phenomenon of uneven brightness may occur. Specifically, the position luminance that light supplementing source 203 is just right is higher usually, and the position luminance that the clearance is just right is darker usually, through diffusion layer 204's setting, can break up the light that light supplementing source 203 sent to carry out the light supplementing for compensating zone BK uniformly, avoid appearing the uneven phenomenon of bright dark, be favorable to promoting the homogeneity of light.

Optionally, the diffusion layer 204 may be a diffusion sheet, or a Polymer Dispersed Liquid Crystal (PDLC), or other materials may be selected as desired.

In an embodiment of the invention, referring to fig. 9, fig. 9 is another schematic cross-sectional view BB' of the display module shown in fig. 2, and referring to fig. 2, the display module 100 further includes a polarizer 40, the polarizer 40 is located on one side of the light-emitting surface of the backlight module 20, and the side plate 2012 and the polarizer 40 are fixed by the transparent adhesive 205.

It is understood that the display module 100 further includes a polarizer 40, the polarizer 40 has a polarizing axis, and the polarizer 40 absorbs light in a direction perpendicular to the polarizing axis and only allows light in the polarizing axis to pass through, so as to convert natural light into linearly polarized light. The polarizer 40 may or may not include a brightness enhancement Film (brightness enhancement Film) having Polarization characteristics, and may be selected according to specific requirements.

In this embodiment, a transparent adhesive 205 is disposed between the side plate 2012 and the polarizer 40, and the side plate 2012 and the polarizer 40 are fixed by the transparent adhesive 205. Meanwhile, because the transparent adhesive 205 has better light transmission, in the display state of the non-photosensitive state, the light in the backlight module 20 can reach the display panel 10 through the transparent adhesive 205 to supplement light for the display panel 10, so that in the display state of the non-photosensitive state, a user cannot see an obvious black edge.

It should be noted that the shapes and sizes of the polarizer 40 and the light-shielding adhesive 205 in fig. 9 are only schematic and do not represent actual shapes and sizes.

In an embodiment of the present invention, with continued reference to fig. 2, fig. 3, fig. 4, fig. 5(a) -fig. 5(f), and fig. 7, the light compensation sources 203 are uniformly distributed in the compensation zone BK.

It can be understood that, generally, the luminance of the position opposite to the light compensation source 203 is higher, and the luminance of the other positions is lower, so that the light compensation source 203 is uniformly distributed in the compensation area BK, which is beneficial to improving the luminance uniformity of each area in the compensation area BK, and the light compensation source 203 is prevented from being arranged in a gathering manner, so that the luminance of the position opposite to the light compensation source 203 is higher, and the luminance of the other positions is lower, so that the luminance of the position of the compensation area BK is not uniform in the display state of the non-photosensitive state of the display module 100, and the display effect of the display module 100 is finally affected.

It should be noted that fig. 5(a) -5(f) and 7 only show some arrangement situations of the light compensation sources 203, and the arrangement rule of the light compensation sources 203 can be adjusted according to actual requirements, so as to achieve the effect of performing uniform light compensation on the compensation area BK.

In an embodiment of the invention, referring to fig. 10, fig. 10 is a partially enlarged schematic view of C in fig. 2, and referring to fig. 2 and fig. 3 continuously, the display panel 10 includes a display area 101, a transition area 102 and a photosensitive area 103, a forward projection of the transition area 101 on the light-emitting surface of the backlight module 20 at least partially overlaps a forward projection of the compensation area BK on the light-emitting surface of the backlight module 20, a forward projection of the photosensitive area 103 on the light-emitting surface of the backlight module 20 at least partially overlaps a forward projection of the first hollow area H on the light-emitting surface of the backlight module 20;

the display panel 10 includes a plurality of color pixel units P, including a first color pixel unit 1011 located in the display region 101 and a second color pixel unit 1021 located in the transition region 102, wherein the total aperture area of the first color pixel unit 1011 is larger than the total aperture area of the second color pixel unit 1021.

It can be understood that the display panel 10 includes a plurality of color pixel units P, and the color pixel units P may include a red pixel unit (R), a green pixel unit (G), and a blue pixel unit (B), and may also include color pixel units P of other colors, which are not distinguished by patterns in fig. 10 and are not described below. In addition, the display panel 10 may further include a white pixel unit (not shown in the figure), and it is understood that the white pixel unit has higher light transmittance compared to a color pixel unit, and thus the luminance of the display panel 10 may be improved, and the color contrast may be improved. When the display module 100 is a liquid crystal display module, the utilization rate of the light of the backlight module 20 can be increased, so that the power consumption of the backlight module 20 is reduced, and the power consumption of the display module 100 is further reduced.

Fig. 10 illustrates only the color pixel unit P as a rectangle, and in other embodiments of the present application, the color pixel unit P may also have other shapes such as a circle, an ellipse, a diamond, and the like. In addition, in fig. 10, only the display area 101 is illustrated as a rectangle, the transition area 102 is illustrated as an annulus, and the photosensitive area 103 is illustrated as a circle, in other embodiments of the present application, the three areas may also be in other shapes, which is not limited in this application and will not be described in detail below.

It should be noted that, the total aperture area of the first color pixel unit 1011 is larger than the total aperture area of the second color pixel unit 1021, which may mean that the aperture areas of the single first color pixel unit 1011 and the single second color pixel unit 1021 are not changed, and the pixel density of the first color pixel unit 1011 is larger than the pixel density of the second color pixel unit 1021; the pixel density of the first color pixel unit 1011 and the pixel density of the second color pixel unit 1021 are the same, and the opening area of the single first color pixel unit 1011 is larger than that of the single second color pixel unit 1021; it may also mean that both the opening area and the pixel density of the single color pixel unit P are changed together. It can be understood that, because the light in the compensation area BK is provided by the light compensating source 203, there may be a brightness difference with other areas of the backlight module 20, and through the differential design of the color pixel units P of the display area 101 and the transition area 102, the brightness difference caused by the backlight module 20 can be further balanced, the brightness difference between the display area 101 and the transition area 102 in the display state of the display module 100 in the non-photosensitive state is reduced, the brightness uniformity of the display area 101 and the transition area 102 is improved, and the display effect of the display module 100 is effectively ensured.

In an embodiment of the invention, referring to fig. 11 and 12, fig. 11 is a partial schematic view of a portion C in fig. 2, fig. 12 is another schematic view of a cross section BB' of the display module in fig. 2, and referring to fig. 2, the color pixel unit P further includes a third color pixel unit 1031, the third color pixel unit 1031 is located in the photosensitive area 103, wherein a total opening area of the third color pixel unit 1031 is smaller than a total opening area of the second color pixel unit 1021.

Note that, the total opening area of the second color pixel unit 1021 is larger than the total opening area of the third color pixel unit 1031, which may mean that the opening areas of the single second color pixel unit 1021 and the single third color pixel unit 1031 are unchanged, and the pixel density of the second color pixel unit 1021 is larger than the pixel density of the third color pixel unit 1031; it may also mean that the pixel densities of the second color pixel unit 1021 and the third color pixel unit 1031 are the same, and the opening area of a single second color pixel unit 1021 is larger than the opening area of a single third color pixel unit 1031; it may also mean that both the opening area and the pixel density of the single color pixel unit P are changed together.

The color pixel units P are disposed in the photosensitive area 103, and in the non-photosensitive display state, the photosensitive area 103 may also display an image, that is, the display area 101, the transition area 102, and the photosensitive area 103 all display, so as to implement a full screen and further improve the screen occupation ratio. Because the orthographic projection of the photosensitive area 103 on the light-emitting surface of the backlight module 20 is at least partially overlapped with the orthographic projection of the photosensitive element 30 on the light-emitting surface of the backlight module 20, in order to meet the photosensitive requirement of the photosensitive element 30, the photosensitive area 103 is usually provided with a light-transmitting area (not marked in the figure), so that the external light can enter the photosensitive element 30 through the photosensitive area 103, and the photosensitive requirement of the photosensitive element 30 is ensured. Correspondingly, light below the display panel 10 can also permeate the light-transmitting area to enter the display panel 10, light supplement is carried out on the display panel 10, therefore, in order to avoid the brightness of the photosensitive area 103 to be too big than the difference between the display area 101 and the transition area 102, thereby the display effect is influenced, from the display area 101 to the transition area 102 to the photosensitive area 103, the total opening area of the color pixel unit P is gradually reduced, which is beneficial to improving the brightness uniformity of three areas, thereby the display effect of the display module 100 is ensured.

It is understood that, in the embodiment, the polarizer 40 corresponding to the light sensing region 103 is not hollowed, because, when the display module 100 performs displaying, the polarizer 40 is required to filter the polarized light including the vibration in each direction, so as to become linearly polarized light. Therefore, when the sensing region 103 is used for displaying, no hole is drilled in the corresponding position of the polarizer 40. When the sensing area 103 does not display, the corresponding position on the polarizer 40 is usually drilled (refer to fig. 3), so as to avoid the influence of the polarizer 40 on the external light, thereby improving the photosensitive effect of the photosensitive element 30 and the photosensitive performance of the photosensitive element 30, for example, when the photosensitive element 30 is a camera, the influence of the polarizer 40 on the external light can be avoided, thereby causing the problem of low resolution or distortion of the final photographed picture.

In an embodiment of the invention, referring to fig. 13 and 14, fig. 13 and 14 are still another partial enlarged views of C in fig. 2, and with continued reference to fig. 2, the opening area of the second color pixel unit 1021 gradually increases along the direction from the photosensitive area 103 to the display area 101.

It is understood that the aperture area of the second color pixel unit 1021 can be adjusted by adjusting the length of the second color pixel unit 1021 in the X direction, adjusting the length of the second color pixel unit 1021 in the Y direction, and adjusting the lengths of the two directions simultaneously. By setting the opening area of the second color pixel unit 1021 in the transition region 102 to be gradually changed, the brightness difference between the display region 101 and the transition region 102 can be further balanced, thereby realizing smooth transition and avoiding the phenomenon of uneven brightness. When the photosensitive area 103 is used for displaying, the difference of the brightness of the three areas can be reduced by the gradual change of the opening area of the second color pixel unit 1021, the boundary of each area is effectively weakened, the image display quality is improved, and the display effect is improved.

In addition, the second color pixel unit 1021 can be gradually changed within the range of 3-5 color pixel units P at the boundary of the transition region 102, so as to realize smooth transition of the brightness of the transition region 102.

In an embodiment of the invention, please refer to fig. 15, fig. 15 is a schematic view of another BB' interface of the display module shown in fig. 2, and refer to fig. 2 and fig. 4 continuously. The minimum distance from the photosensitive element 30 to the polarizer 40 or the extension line thereof (when the polarizer 40 is drilled at the corresponding position) is W, the minimum distance from the side of the bottom plate away from the display panel 10 to the side of the optical film group close to the display panel 10 is h1, and the minimum distance from the side of the optical film group close to the display panel 10 to the polarizer 40 is h2, where h is h1+ h2, and in this embodiment, W is not more than h. In the orthographic projection of the photosensitive element 30 on the light-emitting surface of the backlight module 20, the distance between the two farthest end points is d, wherein d is not more than r. That is, the photosensitive element 30 and the backlight module 20 at least partially overlap in a direction in which the first hollow portion H points to the optical film assembly 202. In other words, the photosensitive element 30 at least partially enters the first hollow portion H in a direction perpendicular to the light emitting surface of the backlight module 20.

Optionally, when the photosensitive element 30 is a camera, in order to meet a field of view (FOV) requirement, the photosensitive element 30 and the backlight module 20 at least partially overlap each other along a direction in which the first hollow-out portion H points to the optical film assembly 202. It can be understood that, since the photosensitive element 30 has a certain photosensitive angle, if the photosensitive element 30 is located on a side of the backlight module 20 away from the display panel 10, that is, in a direction pointing to the optical film set 202 along the first hollow portion H, the photosensitive element 30 and the backlight module 20 are not overlapped at all, which may affect an angle range of the photosensitive element 30 collecting the ambient light, and further affect an imaging range of the photosensitive element 30. In addition, W is less than or equal to h, so that the overall thickness of the display module 100 can be reduced, and the display module 100 is light and thin.

Based on the same inventive concept, the present invention further provides a display device, please refer to fig. 16, and fig. 16 is a structural diagram of the display device according to the present invention. The display device comprises the display module. It can be understood that the display module that this application provided can be for the water droplet screen, dig hole screen, bang screen, also can be for the full screen (the camera under the screen). The display device 200 provided by the present application may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital camera, a navigator and the like.

By the embodiment, the display module and the display device provided by the invention at least realize the following beneficial effects:

in the display module and the display device provided by the invention, the orthographic projection of the first hollow part on the light-emitting surface of the backlight module is a first projection, and the distance between two end points which are farthest away from the first projection is r; the orthographic projection of the second hollow part on the light-emitting surface of the backlight module is a second projection, and the distance between two end points which are farthest away on the second projection is b; the thickness of the side plate along the direction of the first hollow part pointing to the optical film group is a, wherein b > (r +2 a). Compared with the prior art, through the aperture of increase second fretwork portion, be favorable to reducing the light entering photosensitive element's of photosensitive element in backlight unit under the sensitization state part to promote photosensitive element's sensitization function, and for prior art, cancel the design that the shading was glued, be favorable to reducing the frame under the display state of non-sensitization state, thereby promote display module's screen to account for than. Meanwhile, the compensation area between the side plate and the optical film group is internally provided with the light compensating source, so that the display brightness of the compensation area is favorably improved, and the phenomenon that the brightness difference between the compensation area and other display areas is too large and the brightness is uneven is avoided.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. A display module is characterized by comprising a backlight module and a photosensitive element, wherein the backlight module comprises a frame body, the frame body comprises a bottom plate and a side plate, and the side plate surrounds to form a first hollow part; the orthographic projection of the first hollow part on the light-emitting surface of the backlight module is at least partially overlapped with the orthographic projection of the photosensitive element on the light-emitting surface of the backlight module;

wherein b > (r +2 a);

2. The display module according to claim 1, wherein the light supplement source is turned off when the display module is in a photosensitive state.

3. The display module of claim 2, wherein b ≦ 4(r +2 a).

4. The display module of claim 1, wherein the light supplement source comprises a first light supplement source group and a second light supplement source group, and the first light supplement source group is located between the second light supplement source group and the side plate.

5. The display module according to claim 4, wherein the first light supplement source group includes at least two first light supplement sources and a first gap, the first gap is located between two adjacent first light supplement sources, the second light supplement source group includes a second light supplement source, the second light supplement source points to the direction of the optical film group along the first hollow portion, and an orthographic projection of the second light supplement source on the side plate covers the first gap.

6. The display module according to claim 1, wherein a diffusion layer is disposed on a side of the light supplement source away from the bottom plate.

7. The display module according to claim 1, wherein the display module further comprises a polarizer, the polarizer is located on one side of the light-emitting surface of the backlight module, and the side plate and the polarizer are fixed by a light-transmitting adhesive.

8. The display module according to claim 1, wherein the light compensating sources are uniformly distributed in the compensation region.

9. The display module according to claim 1, wherein the display module further comprises a display panel, the display panel comprises a display area, a transition area and a photosensitive area, an orthographic projection of the transition area on the backlight module light-emitting surface at least partially overlaps with an orthographic projection of the compensation area on the backlight module light-emitting surface, and an orthographic projection of the photosensitive area on the backlight module light-emitting surface at least partially overlaps with an orthographic projection of the first hollow area on the backlight module light-emitting surface;

the display panel comprises a plurality of color pixel units, the color pixel units comprise first color pixel units located in the display area and second color pixel units located in the transition area, and the total opening area of the first color pixel units is larger than that of the second color pixel units.

10. The display module of claim 9, wherein the color pixel units further comprise a third color pixel unit located in the photosensitive region, wherein a total opening area of the third color pixel unit is smaller than a total opening area of the second color pixel unit.

11. The display module of claim 9, wherein the opening area of the second color pixel unit gradually increases along a direction from the photosensitive area to the display area.

12. A display device comprising the display module of claims 1-11.