CN118019409A - Cover plate, display module and display device - Google Patents

Abstract

Apron, display module assembly and display device relate to and show technical field. The cover plate comprises a central area and an edge area surrounding the central area, and the cover plate comprises: the transparent substrate and the first barrier layer arranged on one side of the transparent substrate, wherein the first barrier layer is positioned in the edge area, and the first barrier layer can transmit ultraviolet light.

Description

Cover plate, display module and display device

Technical Field

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

Background

With the development of display technology, an Organic LIGHT EMITTING Diode (OLED) flexible display module can be manufactured into various display devices such as curved surfaces, folding, special shapes, curling and the like due to the soft characteristic of the OLED flexible display module, so that the application of flexible products is wider and wider, and the requirements of users on the performances such as bending, curling and the like of the flexible products are higher and higher.

Disclosure of Invention

The present disclosure provides a cover plate including a central region and an edge region surrounding the central region, the cover plate including:

The transparent substrate and the first barrier layer arranged on one side of the transparent substrate, wherein the first barrier layer is positioned in the edge area, and the first barrier layer can transmit ultraviolet light.

In some embodiments, the first barrier layer has a transmittance of greater than or equal to 10% for ultraviolet light.

In some embodiments, the first barrier layer includes an infrared aperture region for transmitting infrared light, the first barrier layer material within the infrared aperture region being the same as the first barrier layer material outside the infrared aperture region.

In some embodiments, the first blocking layer has a transmittance of greater than or equal to 85% for infrared light.

In some embodiments, the first blocking layer has a transmittance of less than or equal to 15% for visible light.

In some embodiments, the first barrier layer is blue, violet, or bluish violet in color.

In some embodiments, the first blocking layer is capable of transmitting ultraviolet light at a wavelength greater than or equal to 385 nanometers and less than or equal to 425 nanometers.

The present disclosure provides a display module, including:

A display panel including a display region and a frame region surrounding the display region;

The cover plate of any embodiment, disposed on a light emitting side of the display panel, the first blocking layer disposed adjacent to the display panel, an orthographic projection of the central region on the display panel overlapping the display region, the orthographic projection of the first blocking layer on the display panel overlapping the bezel region; and

The glue film is arranged between the display panel and the cover plate, the orthographic projection of the glue film on the display panel overlaps with the orthographic projection of the first barrier layer on the display panel, and the glue film is used for pasting the display panel and the cover plate and can be cured under the irradiation of ultraviolet light.

In some embodiments, the display area includes a plurality of subpixels, and the display panel includes:

A light-emitting substrate including a light-emitting device at each of the sub-pixels; and

The second blocking layer is arranged on the light emitting side of the light emitting substrate and used for blocking the transmission of visible light, and comprises a first blocking pattern located in the frame area, and the orthographic projection of the first blocking layer on the display panel is overlapped with the first blocking pattern.

In some embodiments, an orthographic projection outer contour of the first barrier layer on the display panel is substantially flush with an outer contour of the first barrier pattern;

The inner outline of the orthographic projection of the first barrier layer on the display panel is positioned on one side of the inner outline of the first barrier pattern, which is close to the frame area.

In some embodiments, the second barrier layer further comprises:

A second barrier pattern including a plurality of openings in the display region, orthographic projections of different openings on the light emitting substrate covering light emitting devices of different sub-pixels;

The display panel further includes: the filter layer comprises a plurality of filter patterns, wherein different filter patterns are arranged at different opening positions, and different color filter patterns are used for transmitting different color visible light.

In some embodiments, the glue layer comprises at least one of the following materials: : an optically clear adhesive or an optically clear resin.

Embodiments of the present disclosure provide a cover plate including a central region and an edge region surrounding the central region, the cover plate including: the transparent substrate and the first barrier layer arranged on one side of the transparent substrate, wherein the first barrier layer is positioned in the edge area, and the first barrier layer can transmit ultraviolet light. Utilize the first barrier layer that can sees through the ultraviolet ray for when pasting the apron to display panel, the ultraviolet ray can see through first barrier layer, thereby carries out the UV solidification in the glue film between apron and the display panel, promotes the solidification effect of marginal regional glue film, promotes the cohesiveness between apron and the display panel.

The present disclosure provides a display device including:

the display module of any embodiment; and

And the driving chip is connected with the display panel and used for driving the display panel to display pictures.

The foregoing description is merely an overview of the technical solutions of the present disclosure, and may be implemented according to the content of the specification in order to make the technical means of the present disclosure more clearly understood, and in order to make the above and other objects, features and advantages of the present disclosure more clearly understood, the following specific embodiments of the present disclosure are specifically described.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the related art, a brief description will be given below of the drawings required for the embodiments or the related technical descriptions, and it is obvious that the drawings in the following description are some embodiments of the present disclosure, and other drawings may be obtained according to the drawings without any inventive effort for a person of ordinary skill in the art. It should be noted that the scale in the drawings is merely schematic and does not represent actual scale.

Fig. 1 exemplarily shows a schematic view of a partial cross-sectional structure of a display module in the related art;

Fig. 2 is a schematic view exemplarily showing a peeling problem of a display module in the related art;

FIG. 3 schematically illustrates a plan view of a cover plate provided by the present disclosure;

FIG. 4 schematically illustrates a cross-sectional view of one cover plate provided by the present disclosure;

FIG. 5a schematically illustrates a plan view of an infrared aperture area in a cover plate;

FIG. 5b schematically illustrates a plan view of another infrared aperture area in a cover plate;

fig. 6 exemplarily illustrates a schematic cross-sectional structure of a display module provided by the present disclosure;

fig. 7 exemplarily shows a light transmission schematic diagram of a display module provided by the present disclosure;

FIG. 8 is a graph schematically illustrating light transmission spectra of a display module provided by the present disclosure;

fig. 9 exemplarily shows a physical diagram of a display module provided by the present disclosure;

Fig. 10 exemplarily shows still another cross-sectional structure schematic view of the display module provided by the present disclosure;

fig. 11 exemplarily shows a schematic view of a partial planar structure of a display module provided by the present disclosure;

fig. 12 exemplarily shows a schematic structural view of a display device provided by the present disclosure.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are some embodiments of the present disclosure, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure.

With the development of display technology, the OLED display panel can be manufactured into various display devices such as curved surfaces, folding, special shapes, curling and the like due to the soft characteristic of the OLED display panel, so that the application of flexible products is wider and wider, and it is important to improve the bending and curling properties of the flexible products.

In the related art, in order to achieve the optimal bonding effect of the adhesive layer 202 between the OLED display panel 201 and the cover plate 101 during the preparation of the display module, two curing processes are required, including pre-curing and the present curing, and a circle of black ink is disposed on the edge of the cover plate 101, so that the ultraviolet light cannot penetrate through the black ink (as shown in fig. 1) during the present curing, which results in the failure of the edge of the display module to perform the present curing, and further results in insufficient adhesion, and the problem that the OLED display panel 201 and the cover plate 101 are peeled off (Peeling) during the bending test and the high-temperature high-humidity reliability test (as shown in fig. 2) is very easy to occur.

In the related art, the upper, left and right sides of the display module are often cured by using high-energy curing parameters, but the curing depth is limited, and the lower side is close to the binding area, so that if the too high curing energy is used, the display module is damaged, and the overall curing effect is poor.

As shown in fig. 3, the present disclosure provides a cover plate 10 including a central area CA and an edge area SA surrounding the central area CA. As shown in fig. 4, the cover plate 10 includes: a transparent substrate 101, and a first barrier layer 102 provided on one side of the transparent substrate 101, the first barrier layer 102 being located in the edge area SA, the first barrier layer 102 being transparent to ultraviolet light.

Illustratively, the host material of the first barrier layer 102 includes, for example, an ink that is transmissive to ultraviolet light and at least partially opaque to visible light.

The embodiment of the disclosure uses the first blocking layer 102 that can transmit ultraviolet light, so that when the cover plate 10 is adhered to the display panel, ultraviolet light can penetrate through the first blocking layer 102, thereby UV curing is performed on the adhesive layer between the cover plate 10 and the display panel 201, curing effect of the adhesive layer in the edge area is improved, and cohesiveness between the cover plate 10 and the display panel 201 is improved.

In some embodiments, the first barrier layer 102 has a transmittance of greater than or equal to 10% for ultraviolet light.

Illustratively, the first barrier layer 102 may have a transmittance of, for example, 15%, or 20%, or 30% for ultraviolet light.

In some embodiments, as shown in fig. 5a, the first barrier layer 102 includes an infrared aperture region 103, the infrared aperture region 103 is configured to transmit infrared light, and the material of the first barrier layer 102 in the infrared aperture region 103 is the same as the material of the first barrier layer 102 outside the infrared aperture region 103.

According to the embodiment of the disclosure, the material of the first barrier layer 102 in the infrared hole area 103 is the same as that of the first barrier layer 102 outside the infrared hole area 103, so that the visual integrated effect is realized, and in addition, only one-time printing is needed during preparation, separate printing is not needed, and the cost can be reduced.

In some embodiments, the first barrier layer 102 has a transmittance of greater than or equal to 85% for infrared light.

Illustratively, the first barrier layer 102 has a transmittance of greater than or equal to 85%, such as 85%, or 90%, or 95%, for example, for 850 nm wavelength red light or 940 nm wavelength red light.

In the embodiment, the material of the first barrier layer 102 in the infrared hole region 103 may be different from the material of the first barrier layer 102 outside the infrared hole region 103, as shown in fig. 5b, which is not limited in the disclosure. For example, the transmittance of the material of the first blocking layer 102 outside the infrared hole region 103 for infrared light is greater than the transmittance of the material of the first blocking layer 102 outside the infrared hole region 103 for infrared light.

In order to improve the shielding effect of the first barrier layer 102 on the display panel bezel wiring, in some embodiments, the transmittance of the first barrier layer 102 for visible light is less than or equal to 15%, for example, may be 15%, or 10%, or 12%.

Illustratively, in the case where the first barrier pattern 301 is provided in the display panel, the first barrier layer 102 may have a wide selection range of the transmittance of visible light, and may be greater than, equal to, or less than 15%. By providing the first blocking layer 102 with a transmittance of less than or equal to 15% for visible light, the frame wiring of the display panel can be better blocked.

For example, in the case where the first blocking pattern 301 is not provided in the display panel, in order to avoid visibility of the display panel bezel wiring, the transmittance of the first blocking layer 102 to visible light may be less than or equal to 1%, for example, 1%, or 0.5%, or 0.2%, and the corresponding Optical Density value (OD) is greater than or equal to 2.0, such as 2.98, 2.52, 2.02 shown in fig. 8.

The transmittance of the first barrier layer 102 to visible light may be, for example, the transmittance of the first barrier layer 102 to visible light with a wavelength of 550nm.

In some embodiments, the first barrier layer 102 is blue, violet, or bluish violet in color. For example, the first barrier layer 102 may be dark blue, dark purple, or dark blue-purple in color.

In some embodiments, the first barrier layer 102 is capable of transmitting ultraviolet light at a wavelength greater than or equal to 385 nanometers and less than or equal to 425 nanometers.

Referring to fig. 8, a transmission spectrum of the first blocking layer 102 is shown. As shown in fig. 8, the first blocking layer 102 has a transmission peak with a peak wavelength of 405 nm in the ultraviolet light band. In some embodiments, the transmission peak-to-peak wavelength of the first barrier layer 102 in the ultraviolet band may be in the range of 405 nanometers ±20 nanometers.

Illustratively, the first barrier layer 102 may also transmit a portion of the ultraviolet light in the visible light band that is adjacent to the ultraviolet light, and other visible light other than the ultraviolet light may not transmit through the first barrier layer 102.

Illustratively, by adjusting the concentration of inorganic particles in the first barrier layer 102, the OD value, transmittance to ultraviolet light, transmittance to visible light, color, and the like of the first barrier layer 102 are adjusted. Fig. 8 shows the transmission spectrum of the first barrier layer 102 at three different OD values.

As shown in fig. 6, the present disclosure provides a display module 20, including: a display panel 201 including a display area AA and a bezel area BA surrounding the display area; the cover plate 10 according to any one of the above embodiments is disposed on the light-emitting side of the display panel 201, the first barrier layer 102 is disposed near the display panel 201, the front projection of the central area CA on the display panel 201 overlaps the display area AA, and the front projection of the first barrier layer 102 on the display panel 201 overlaps the bezel area BA; and a glue layer 202 disposed between the display panel 201 and the cover plate 10, wherein a front projection of the glue layer 202 on the display panel 201 overlaps a front projection of the first barrier layer 102 on the display panel 201, and the glue layer 202 is used for adhering the display panel 201 and the cover plate 10 and is capable of being cured under irradiation of ultraviolet light.

For example, after the glue layer 202 is formed on the side of the display panel 201 near the cover plate 10, the glue layer 202 may be pre-cured, and after the cover plate 10 is adhered to the display panel 201, the glue layer 202 is cured by using an ultraviolet light source.

In some embodiments, the glue layer 202 comprises at least one of the following materials: : an optically clear adhesive or an optically clear resin.

Illustratively, an optically clear resin (Optical CLEAR RESIN, OCR) also has the following advantages over an optically clear adhesive (Optically CLEAR ADHESIVE, OCA): the shape is free and unconstrained, and can correspond to various shapes such as hole digging, abnormal shape, 3D and the like, and the control is only needed by adjusting a glue outlet program, and additional cutting is not needed; the thickness is free, different thicknesses can be formed at different positions of the same product, the thickness range is wide, the thickness range is more than or equal to 10 micrometers and less than or equal to 1 millimeter, and for example, the thickness range can be 50 micrometers, 500 micrometers and 1 millimeter; the packing material has good fluidity and excellent packing performance and folding performance, can realize smaller folding radius and longer folding life, and can meet more severe folding reliability test.

Illustratively, the OCA is an optical tape or optical double-sided tape, the OCR is a liquid optical or optical hydrocolloid, and the OCR material may include at least one of: silicone, acrylic, and the like.

The inventor found that in the black screen state, the display module using the cover plate provided by the present disclosure easily generates an obvious demarcation as shown in fig. 9 in the display area AA and the bezel area BA. To improve this problem, in some embodiments, as shown in fig. 10, the display area AA includes a plurality of sub-pixels PX, and the display panel 201 includes: a light emitting substrate 203 including light emitting devices LD located at the respective sub-pixels PX; and a second blocking layer 204 disposed on the light emitting side of the light emitting substrate 203 for blocking the transmission of visible light, and including a first blocking pattern 301 in the frame area BA, as shown in fig. 11, the front projection of the first blocking layer 102 on the display panel 201 overlaps the first blocking pattern 301.

By arranging the first blocking pattern 301 in the frame area BA of the display panel, and overlapping the orthographic projection of the first blocking pattern 301 and the first blocking layer 102 on the display panel 201, the frame wiring of the display panel can be better shielded by reasonably selecting the material of the first blocking pattern 301, the problem of insufficient shielding performance of the first blocking layer 102 is solved, and the visual difference between the display area AA and the frame area BA in the black screen state is reduced.

Illustratively, as shown in fig. 10, the light emitting devices LD of different sub-pixels PX are disposed at intervals by a pixel defining layer PDL.

Illustratively, as shown in fig. 11, the first barrier pattern 301 completely covers the front projection of the first barrier layer 102 on the display panel 201, and the width D1 of the first barrier pattern 301 is greater than the width D2 of the first barrier layer 102 in the direction F1 in which the display area AA points to the bezel area BA.

In some embodiments, as shown in fig. 11, the front projection outer contour of the first barrier layer 102 on the display panel 201 is substantially flush with the outer contour of the first barrier pattern 301; the inner outline of the front projection of the first barrier layer 102 on the display panel 201 is located at a side of the inner outline of the first barrier pattern 301 near the bezel area BA.

In some embodiments, as shown in fig. 10, the second barrier layer 204 further comprises: the second barrier pattern 302 includes a plurality of openings located in the display area AA, and orthographic projections of different openings on the light emitting substrate 203 cover the light emitting devices LD of different sub-pixels PX.

In some embodiments, as shown in fig. 10, the display panel 201 further includes: the filter layer 205 includes a plurality of filter patterns 401, and different filter patterns 401 are disposed at different opening positions, and different color filter patterns 401 are used to transmit different color visible light.

Illustratively, the filter layer 205 is located on a side of the display panel 201 adjacent to the glue layer 202.

In some embodiments, as shown in fig. 10, the plurality of sub-pixels PX include a red sub-pixel PX-R, a green sub-pixel PX-G, and a blue sub-pixel PX-B, and the plurality of filter patterns 401 include: a red filter pattern 401-R, located in the red subpixel PX-R, for transmitting red light; a green filter pattern 401-G located at the green sub-pixel PX-G for transmitting green light; and a blue filter pattern 401-B located at the blue subpixel PX-B for transmitting blue light.

By providing the second blocking pattern 302 and the filter layer 205, reflection of ambient light by the display panel can be reduced, thereby eliminating the need for providing a polarizer on the display side of the display panel.

Illustratively, as shown in FIG. 10, the light emitting device LD includes a red light emitting device LD-R for emitting red light; a green light emitting device LD-G for emitting green light; and a blue light emitting device LD-B for emitting blue light.

Illustratively, as shown in fig. 10, the light emitting substrate 203 may include: the flexible substrate 211, the pixel driving circuit 212 that is disposed on the side of the flexible substrate 211 near the second barrier layer 204, the light emitting device LD is located on the side of the pixel driving circuit 212 away from the flexible substrate 211, the light emitting device LD is connected with the pixel driving circuit 212, and the pixel driving circuit 212 is used for driving the light emitting device LD to emit light.

Illustratively, as shown in fig. 6, the display module 20 further includes: the heat dissipation film 311 and the support 312 are arranged on one side of the display panel 201 away from the adhesive layer 202, and the heat dissipation film 311 is arranged between the display panel 201 and the support 312.

Illustratively, as shown in fig. 6, the display module 20 further includes: the source driving chip IC and the flexible circuit board FPC, and the source driving chip IC and the display panel 201 are connected through the flexible circuit board FPC.

As shown in fig. 12, the present disclosure provides a display device 1000 including: the display module 20 according to any one of the above embodiments; and a driving chip 30 connected to the display panel 201 for driving the display panel 201 to display a picture.

The display device provided by the present disclosure may be: any product or component with display function such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a vehicle-mounted display device, a smart watch, a body-building wristband, a personal digital assistant and the like.

It will be appreciated by those skilled in the art that the display device 1000 provided by the present disclosure has the advantages of the display module 20 described in any of the above embodiments.

In the present disclosure, the meaning of "a plurality of" means two or more, and the meaning of "at least one" means one or more, unless specifically defined otherwise.

In the present disclosure, the orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present disclosure.

The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.

Reference herein to "one embodiment," "some embodiments," "an exemplary embodiment," "one or more embodiments," "an example," "one example," "some examples," etc., is intended to mean that a particular feature, structure, material, or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

In describing some embodiments, the expressions "coupled" and "connected" may be used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more elements are in direct physical or electrical contact with each other. As another example, the term "coupled" may be used in describing some embodiments to indicate that two or more elements are in direct physical or electrical contact. However, the term "coupled" or "communicatively coupled (communicatively coupled)" may also mean that two or more elements are not in direct contact with each other, but yet still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the disclosure herein.

At least one of "A, B and C" has the same meaning as at least one of "A, B or C" and includes the following combinations of A, B and C: a alone, B alone, C alone, a combination of a and B, a combination of a and C, a combination of B and C, and a combination of A, B and C.

"A and/or B" includes the following three combinations: only a, only B, and combinations of a and B.

As used herein, the term "if" is optionally interpreted to mean "when … …" or "at … …" or "in response to a determination" or "in response to detection" depending on the context. Similarly, the phrase "if determined … …" or "if a [ stated condition or event ] is detected" is optionally interpreted to mean "upon determination … …" or "in response to determination … …" or "upon detection of a [ stated condition or event ]" or "in response to detection of a [ stated condition or event ], depending on the context.

The use of "configured to" or "configured to" herein is meant to be open and inclusive language that does not preclude devices that are adapted to be configured or configured to perform additional tasks or steps.

The use of "based on" or "according to" herein is meant to be open and inclusive. A process, step, calculation, or other action based on one or more of the conditions or values may be based on other conditions or beyond the values in practice. A process, step, calculation, or other action based on one or more of the conditions or values may be based on other conditions or values in practice.

As used herein, "about," "approximately" or "approximately" includes the stated values as well as average values within an acceptable deviation range of the particular values as determined by one of ordinary skill in the art in view of the measurement in question and the errors associated with the measurement of the particular quantity (i.e., limitations of the measurement system).

As used herein, "parallel", "perpendicular", "equal", "flush" includes the stated case and an approximation to the stated case, the range of which is within an acceptable deviation range as determined by one of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., limitations of the measurement system). For example, "parallel" includes absolute parallel and approximately parallel, where the acceptable deviation range for approximately parallel may be, for example, a deviation within 5 °; "vertical" includes absolute vertical and near vertical, where the acceptable deviation range for near vertical may also be deviations within 5 °, for example. "equal" includes absolute equal and approximately equal, where the difference between the two, which may be equal, for example, is less than or equal to 5% of either of them within an acceptable deviation of approximately equal. "flush" includes absolute flush and near flush, where the distance between the two, which may be flush, for example, is less than or equal to 5% of either dimension within an acceptable deviation of near flush.

It will be understood that when a layer or element is referred to as being "on" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may also be present between the layer or element and the other layer or substrate.

Exemplary embodiments are described herein with reference to cross-sectional and/or plan views as idealized exemplary figures. In the drawings, the thickness of layers and regions are exaggerated for clarity. Thus, variations from the shape of the drawings due to, for example, manufacturing techniques and/or tolerances, are to be expected. Thus, the exemplary embodiments should not be construed as limited to the shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit the scope of example embodiments. Unless otherwise specified, the film thickness refers to the dimension of the film in its normal direction.

Finally, it should be noted that: the above embodiments are merely for illustrating the technical solution of the present disclosure, and are not limiting thereof; although the present disclosure has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present disclosure.

Claims (13)

1. A cover plate comprising a central region and an edge region surrounding the central region, the cover plate comprising:

The transparent substrate and the first barrier layer arranged on one side of the transparent substrate, wherein the first barrier layer is positioned in the edge area, and the first barrier layer can transmit ultraviolet light.

2. The cover sheet of claim 1 wherein the first barrier layer has a transmittance of greater than or equal to 10% for ultraviolet light.

3. The cover plate of claim 1, wherein the first barrier layer comprises an infrared aperture region for transmitting infrared light, the first barrier layer material within the infrared aperture region being the same as the first barrier layer material outside the infrared aperture region.

4. The cover sheet of claim 3, wherein the first barrier layer has a transmittance of 85% or more for infrared light.

5. The cover sheet of any of claims 1-4, wherein the first barrier layer has a transmittance of less than or equal to 15% for visible light.

6. The cover sheet of any one of claims 1 to 4 wherein the first barrier layer is blue, violet or bluish violet in color.

7. The cover sheet of any of claims 1-4, wherein the first barrier layer is capable of transmitting ultraviolet light at a wavelength greater than or equal to 385 nanometers and less than or equal to 425 nanometers.

8. A display module, comprising:

A display panel including a display region and a frame region surrounding the display region;

The cover sheet of any one of claims 1 to 7, disposed on a light exit side of the display panel, the first barrier layer disposed proximate to the display panel, an orthographic projection of the central region on the display panel overlapping the display region, the orthographic projection of the first barrier layer on the display panel overlapping the bezel region; and

The glue film is arranged between the display panel and the cover plate, the orthographic projection of the glue film on the display panel overlaps with the orthographic projection of the first barrier layer on the display panel, and the glue film is used for pasting the display panel and the cover plate and can be cured under the irradiation of ultraviolet light.

9. The display module of claim 8, wherein the display area comprises a plurality of subpixels, the display panel comprising:

A light-emitting substrate including a light-emitting device at each of the sub-pixels; and

The second blocking layer is arranged on the light emitting side of the light emitting substrate and used for blocking the transmission of visible light, and comprises a first blocking pattern located in the frame area, and the orthographic projection of the first blocking layer on the display panel is overlapped with the first blocking pattern.

10. The display module of claim 9, wherein an orthographic projection outer contour of the first barrier layer on the display panel is substantially flush with an outer contour of the first barrier pattern;

The inner outline of the orthographic projection of the first barrier layer on the display panel is positioned on one side of the inner outline of the first barrier pattern, which is close to the frame area.

11. The display module of claim 9, wherein the second barrier layer further comprises:

A second barrier pattern including a plurality of openings in the display region, orthographic projections of different openings on the light emitting substrate covering light emitting devices of different sub-pixels;

The display panel further includes: the filter layer comprises a plurality of filter patterns, wherein different filter patterns are arranged at different opening positions, and different color filter patterns are used for transmitting different color visible light.

12. A display module according to any one of claims 8 to 11, wherein the glue layer comprises at least one of the following materials: an optically clear adhesive or an optically clear resin.

13. A display device, comprising:

The display module of any one of claims 8 to 12; and

And the driving chip is connected with the display panel and used for driving the display panel to display pictures.