CN117711273A - Display panel and display device - Google Patents

Abstract

The invention discloses a display panel and a display device, and relates to the technical field of display. The display panel comprises a cover plate, a light guide assembly and at least two display modules, wherein the at least two display modules are arranged below the cover plate, each display module comprises a display layer, each display layer comprises a bending area, the bending areas of two adjacent display modules are oppositely arranged and are in butt joint, a splicing area is formed by surrounding the cover plate and the two butt joint bending areas, and each bending area positioned in each splicing area comprises a plurality of first light-emitting units; the light guide assembly is arranged in the splicing area and is configured to conduct light emitted by the plurality of first light emitting units to the cover plate and emit the light from the cover plate. The display panel can ensure the display effect on the premise of no seam.

Description

Display panel and display device

Technical Field

The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.

Background

Along with the development of display technology, the demand of on-vehicle even screen and outdoor large screen display is constantly increasing, and the splice display device can splice a plurality of display screens into super large size's splice screen and carry out the picture display according to actual display needs, has advantages such as picture display clarity, flexibility height, dysmorphism are arranged to provide more functions and better display effect. Accordingly, the spliced display device is also receiving increasing attention.

It is necessary to develop a display panel and a display device to solve the problem that the display effect is affected by the existence of a splice gap at the splice position.

Disclosure of Invention

The invention aims to provide a display panel and a display device, which can ensure the display effect on the premise of no seam.

To achieve the purpose, the invention adopts the following technical scheme:

a display panel, comprising:

a cover plate;

the display module comprises a display layer, wherein the display layer comprises bending areas, the bending areas of two adjacent display modules are oppositely arranged and are abutted, a splicing area is formed by surrounding the cover plate and the two abutted bending areas, and the bending areas in the splicing area comprise a plurality of first light-emitting units;

the light guide assembly is arranged in the splicing area and is configured to conduct light emitted by the plurality of first light emitting units to the cover plate and emit the light from the cover plate.

In some embodiments, the light guide assembly includes a plurality of lenses disposed at the bending region, and the first light emitting unit includes a plurality of sub-pixels, each of the lenses being configured to be capable of refracting light emitted from at least one of the sub-pixels toward the cover plate.

In some embodiments, the lens is hemispherical, elliptical, or semi-drop shaped.

In some embodiments, along the bending direction of the bending region, as the bending angle of the bending region increases, the end of the lens corresponding to the bending region with the larger bending angle becomes thicker gradually, and the end of the lens corresponding to the bending region with the smaller bending angle becomes thinner gradually;

preferably, the lens is semi-drop shaped.

In some embodiments, the light guide assembly further includes a plurality of light guide members, the plurality of light guide members are disposed at intervals along a bending direction of the bending region, a plurality of lenses disposed at intervals along a direction perpendicular to the bending direction of the bending region form a lens group, one end of the light guide member abuts against at least one lens of the lens group of the same group, and the other end of the light guide member extends toward the cover plate;

preferably, the light guide is OCR (optical character recognition) glue or packaging glue;

preferably, the thickness of the light guide is 18 to 20 μm.

In some embodiments, the projection of the lens along the thickness direction of the display panel falls within the corresponding light guide;

preferably, a projection area of the lens in the thickness direction of the display panel is smaller than a projection area of the light guide in the thickness direction of the display panel.

In some embodiments, the thickness of the light guide member gradually decreases from both ends of the splicing region toward a direction approaching a center line of the splicing region.

In some embodiments, the light guiding assembly further comprises a plurality of light reflecting elements, the light reflecting elements are attached to the side walls of the light guiding element, and the light reflecting surfaces of the light reflecting elements face the light guiding element;

preferably, the light reflecting member is made of nano silver microparticles;

preferably, the thickness of the light reflecting member is 3-5 μm.

In some embodiments, the light guide assembly further includes a light shielding member disposed in a gap between two adjacent light reflecting members, and a light guide path extending in a vertical direction is formed between the two adjacent light shielding members;

preferably, the light shielding member is made of PDL light shielding glue;

preferably, the thickness of the light shielding member is 2-5 μm.

A display device comprises the display panel.

The invention has the beneficial effects that:

the invention provides a display panel and a display device. In the display panel, the display layer of the display module is bent to form a bending area, so the bending area is provided with a plurality of first light-emitting units, and the bending areas of two adjacent display modules are oppositely arranged and are abutted, so that a splicing area between the two display modules can normally emit light, and a splicing gap does not exist. The light guide assembly can conduct light emitted by the first light emitting units to the cover plate and emit the light from the cover plate, so that a normal display effect is ensured.

Drawings

FIG. 1 is a top view of a display panel provided by the present invention;

FIG. 2 is a schematic diagram of a display panel according to the present invention;

fig. 3 is a partial enlarged view at a in fig. 2.

In the figure:

1. a cover plate; 2. a display module; 3. a light guide assembly; 4. a splicing region; 5. an optical adhesive layer;

21. a display layer; 22. a first light emitting unit; 23. a polarizing layer; 31. a lens; 32. a light guide; 33. a light reflecting member; 34. a light shielding member;

211. and a bending area.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices 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 invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly, and may be, for example, either fixed or removable; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Unless expressly stated or limited otherwise, a first feature being "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.

The embodiment provides a display device, the display device includes a display panel and a housing, the housing has a receiving groove, and the display panel is disposed in the receiving groove to be fixed. In this embodiment, the display device is a tiled display device, such as a vehicle-mounted screen, so that the display device can not only provide driving information display for a driver, but also provide entertainment functions for a passenger sitting in a co-driver.

As shown in fig. 1, the display panel includes a cover plate 1 and at least two display modules 2, where the at least two display modules 2 are disposed below the cover plate 1 to be spliced to form a display device, and the outer shell can be customized according to practical use, and the outer contour of the display module 2 also needs to be customized according to the outer shell to ensure the integrity of the appearance.

Currently, tiled display devices on the market are mainly divided into two categories, LED tiling and LCD/OLED tiling. Although the seamless splicing display can be realized by the LED splicing, the resolution of the LED is lower, and the high resolution requirement cannot be met. For LCD and conventional OLED screen concatenation, there is the frame display screen, and the back is spliced to the polylith screen body, and adjacent frame has black concatenation gap in concatenation department, when the display screen, and frame part is because there is wiring and printing ink to shelter from unable display screen, leads to the picture to be cut apart, influences the display effect.

In order to solve the above-mentioned problems, as shown in fig. 1 and 2, in the display panel provided in this embodiment, the display module 2 includes a display layer 21, the display layer 21 is provided with a plurality of light emitting units, the display layer 21 includes a bending region 211, the bending regions 211 of two adjacent display modules 2 are oppositely arranged and abutted, and the cover plate 1 and the two abutted bending regions 211 surround to form a splicing region 4. Since the bending region 211 of the display module 2 is formed by bending the display layer 21, the bending region 211 in the splicing region 4 includes a plurality of light emitting units and can emit light normally. For convenience of description, the light emitting units other than the inflection region 211 are referred to as second light emitting units, and the light emitting units of the inflection region 211 are referred to as first light emitting units 22.

In some embodiments, the first light emitting unit 22 and the second light emitting unit are both made of a light emitting material capable of being activated, and the picture displayed by the display layer 21 is formed by emitting different colors of light at different positions of the first light emitting unit 22 and the second light emitting unit. Specifically, the first light emitting unit 22 and the second light emitting unit are each a pixel unit, each pixel unit is composed of a plurality of sub-pixels, and in this embodiment, the pixel unit includes three sub-pixels of R (red), G (green), and B (blue), and in other embodiments, the pixel unit may further include sub-pixels of other colors, such as W (white).

In the display panel, since the bending areas 211 of two adjacent display modules 2 are oppositely arranged and abutted, the portions (the bending areas 211) of the two display modules 2 located in the splicing area 4 can normally display pictures through the first light-emitting unit 22, and no splicing gap exists. In other embodiments, the display panel may include a plurality of display modules 2, and the two ends of the display module 2 located in the middle position are provided with bending areas 211, so as to achieve the effects of multi-screen splicing and no seam.

However, since the display layer 21 is bent to form the bending region 211, an included angle exists between the bending region 211 and the cover plate 1, which results in that the light emitted from the first light-emitting unit 22 of the bending region 211 cannot be directly emitted through the cover plate 1, but is reflected in the splicing region 4 to interfere with each other, so as to affect the display effect of the splicing region 4.

In order to solve the above-mentioned problems, the display panel further includes a light guiding component 3, the light guiding component 3 is disposed in the splicing region 4, and the light guiding component 3 is configured to conduct the light emitted by the plurality of first light emitting units 22 to the cover plate 1 and emit the light from the cover plate 1. So that the spliced area 4 emits light normally in the view of the user, thereby ensuring the normal display effect.

It will be appreciated that the light emitted by the first light emitting unit 22 and the second light emitting unit is substantially perpendicular to the display layer 21, and due to the angle between the bending region 211 and the cover plate 1, the light emitted by the first light emitting unit 22 cannot be directly emitted through the cover plate 1 for display.

As shown in fig. 3, to solve the above problem, the light guide assembly 3 includes a plurality of lenses 31, the plurality of lenses 31 are disposed in the bending region 211, and each lens 31 is configured to refract the light emitted from at least one sub-pixel toward the cover plate 1.

It is understood that the light emitted by one lens 31 may be refracted by one corresponding lens 31, or the light emitted by one corresponding lens 31 may be refracted by a plurality of first light emitting units 22, i.e. a plurality of first light emitting units 22. In this embodiment, the light guide assembly 3 has a structure that one lens 31 corresponds to one first light emitting unit 22, that is, light emitted from a plurality of sub-pixels of one first light emitting unit 22 is refracted through the corresponding one lens 31.

Specifically, since the angle between the bending region 211 and the cover plate 1 is gradually increased along the direction of the abutting line (the center line B of the splicing region 4) of the bending region 211 of the display layer 21 to the two bending regions 211, that is, the bending angle of the bending region 211 is increased, the shape of the corresponding lens 31 is also gradually changed.

The bending degree of the edge of the bending region 211 is smaller, the lens 31 is hemispherical, and as the bending angle of the bending region 211 increases, the end of the lens 31 corresponding to the larger bending angle of the bending region 211 becomes thicker gradually, and the end of the lens 31 corresponding to the smaller bending angle of the bending region 211 becomes thinner gradually, so the shape of the lens 31 is preferably a half-drop shape. It should be noted that, in the present embodiment, the thinner end of the lens 31 is the end close to the edge of the splicing region 4, and the thicker end of the lens 31 is the end of the lens 31 away from the edge of the splicing region 4, that is, the thicker end of the lens 31 is closer to the abutment line of the two bending regions 211 than the thinner end of the lens 31. In other embodiments, the lens 31 may be elliptical in shape, so as to adjust the outgoing light of the corresponding first light emitting unit 22 to the thickness direction of the display panel as much as possible.

The light emitting units of the display layer 21 are arranged in a matrix, and for convenience of description, the plurality of lenses 31 are arranged at intervals along the direction perpendicular to the bending direction of the bending region 211 to form lens groups, and the light guide assembly 3 is provided with a plurality of groups of lens groups at intervals along the bending direction of the bending region 211, so that the lenses 31 are in one-to-one correspondence with the first light emitting units 22 of the bending region 211.

As shown in fig. 3, the light guide assembly 3 further includes a plurality of light guide members 32, the plurality of light guide members 32 are disposed at intervals along the bending direction of the bending region 211, one end of the light guide member 32 abuts against at least one lens 31 in the same lens group, and the other end of the light guide member 32 extends toward the cover plate 1. The light guide member 32 can perform a light-transmitting function, thereby reducing the loss of light emitted from the first light-emitting unit 22 when the light is not transmitted to the cover plate 1, and improving the brightness, and thus improving the display effect.

In the present embodiment, the projection of the light guide 32 in the thickness direction of the display panel covers all lenses 31 in the corresponding same group of lens groups. Because the spacing between the pixel units is smaller, the light guide 32 is correspondingly arranged for each pixel unit, which increases the difficulty and is unnecessary. The light guide member 32 is used for guiding the light emitted by the plurality of pixel units at the same time, so that the efficiency can be greatly improved, and the cost can be reduced.

Specifically, the light guide 32 extends in the direction of the bending axis of the display layer 21 (X direction in the drawing). It can be understood that the bending angles of the plurality of first light emitting units 22 arranged along the X direction are the same, and the lights emitted by the first light emitting units 22 are substantially parallel, and the lights emitted by the first light emitting units 22 can be guided to the cover plate 1 by the same light guide 32 without interfering with each other.

As shown in fig. 3, the projection of the lens 31 along the thickness direction of the display panel falls within the corresponding light guide 32, so as to avoid the leakage of light emitted by the lens 31 and ensure that all the light emitted by the lens 31 enters the light guide 32.

Preferably, the projection area of the lens 31 in the thickness direction of the display panel is smaller than the projection area of the light guide 32 in the thickness direction of the display panel. Since the side of the lens 31 facing away from the bending region 211 is a cambered surface, the projection of the lens 31 along the thickness direction of the display panel falls within the light guide member 32, so that the end of the light guide member 32 facing the bending region 211 has a certain thickness, and the defect caused by air bubbles or local excessive thinning in the printing process is avoided.

Specifically, as the bending degree of the bending region 211 increases, the forward projection range of the first light emitting unit 22 in the thickness direction of the display panel gradually decreases, so that the thickness of the light guide 32 gradually decreases from both ends of the splicing region 4 toward the center line direction near the splicing region 4 in order to match the first light emitting unit 22.

When the light emitted by the first light emitting unit 22 is transmitted through the light guide member 32, the light reaching the critical angle is totally reflected by the side wall of the light guide member 32 and remains in the light guide member 32, and finally is emitted through the cover plate 1. However, some of the light is emitted through the side wall of the light guide 32, which is likely to interfere with other light guides 32, thereby affecting the display effect and reducing the brightness of the emitted light.

In this embodiment, the light guiding assembly further includes a plurality of light reflecting elements 33, the light reflecting elements 33 are attached to the side walls of the light guiding element 32, and the light reflecting surfaces of the light reflecting elements 33 face the light guiding element 32. The side wall of the light guide 32 is a surface extending along the thickness direction of the display panel, and the light reflecting member 33 attached to the side wall of the light guide 32 can effectively reduce interference between the light guides 32, and can make all light in the light guide 32 emitted through the cover plate 1, so as to improve the display effect.

In the present embodiment, the light guide 32 may use OCR (Optical Clear Resin, optically transparent resin) glue or encapsulation glue, and the thickness (the dimension in the direction perpendicular to the bending axis of the bending region 211) is 18 to 20 μm. The light reflecting member 33 may use a light reflecting material of nano silver microparticles having a thickness (a dimension in a direction perpendicular to a bending axis of the bending region 211) of 3-5 μm.

It will be appreciated that the display effect of a display panel is not only related to the intensity of the emitted light, but also to the degree of reflection of ambient light. Since the display layer 21 has a plurality of metal members, if ambient light is incident into the display panel through the cover plate 1 and reflected by the metal members of the display layer 21, the ambient light is also observed by the user, and the display effect is reduced.

To solve this problem, the light guide assembly 3 further includes a light shielding member 34, the light shielding member 34 being disposed in a gap between two adjacent light reflecting members 33, and a light guide path extending in a vertical direction being formed between the two adjacent light shielding members 34. Since the light guide members 32 completely cover the at least one lens 31, the gaps between the light guide members 32 have no light emitting structure, so that the light shielding members 34 disposed in the gaps between the light guide members 32 do not affect the light emitting effect of the first light emitting unit 22, and the light shielding members 34 can reduce the total amount of ambient light entering the display panel, thereby reducing the reflection amount of the ambient light and improving the display effect.

The light shielding member 34 is made of PDL (Pixel Define Layer) light shielding glue and functions to reduce reflection of ambient light to a thickness (dimension in a direction perpendicular to the bending axis of the bending region 211) of 2-5 μm.

In order to further reduce the reflection amount of the ambient light, in this embodiment, the display panel further includes a polarizing layer 23, the polarizing layer 23 is disposed between the display layer 21 and the cover plate 1, the ambient light passing through the polarizing layer 23 can be blocked by the polarizing layer 23 to reduce the total amount of the ambient light entering the display panel, and after the ambient light entering the display panel is reflected, the rotation direction of the ambient light changes, so that the polarizing layer 23 cannot be emitted, thereby greatly reducing the reflection amount of the ambient light and improving the display effect.

In order to ensure the stability of the connection between the display module 2 and the change, the display panel further comprises an optical adhesive layer 5, and the optical adhesive layer 5 is arranged between the cover plate 1 and the display module 2. Specifically, the optical adhesive layer 5 is located between the polarizing layer 23 and the cover plate 1.

Preferably, the light guide assembly 3 abuts against the optical adhesive layer 5. Because the optical adhesive layer 5 is attached to the cover plate 1, the light guide assembly 3 is abutted to the optical adhesive layer 5, so that the light emitted by the first light emitting unit 22 can be emitted from the cover plate 1 through the conduction of the light guide assembly 3, and the loss is reduced.

The foregoing is merely exemplary of the present invention, and those skilled in the art should not be considered as limiting the invention, since modifications may be made in the specific embodiments and application scope of the invention in light of the teachings of the present invention.

Claims (10)

1. A display panel, comprising:

a cover plate;

the display module comprises a display layer, wherein the display layer comprises bending areas, the bending areas of two adjacent display modules are oppositely arranged and are abutted, a splicing area is formed by surrounding the cover plate and the two abutted bending areas, and the bending areas in the splicing area comprise a plurality of first light-emitting units;

the light guide assembly is arranged in the splicing area and is configured to conduct light emitted by the plurality of first light emitting units to the cover plate and emit the light from the cover plate.

2. The display panel of claim 1, wherein the light guide assembly comprises a plurality of lenses disposed in the bending region, the first light-emitting unit comprises a plurality of sub-pixels, and each of the lenses is configured to be capable of refracting light emitted from at least one of the sub-pixels toward the cover plate.

3. The display panel of claim 2, wherein the lens is hemispherical, elliptical, or semi-drop shaped.

4. The display panel according to claim 2, wherein along a bending direction of the bending region, as a bending angle of the bending region increases, an end of the lens corresponding to the bending region having a larger bending angle becomes thicker gradually, and an end of the lens corresponding to the bending region having a smaller bending angle becomes thinner gradually;

preferably, the lens is semi-drop shaped.

5. The display panel according to claim 2, wherein the light guide assembly further comprises a plurality of light guide members, the plurality of light guide members are arranged at intervals along a bending direction of the bending region, a plurality of lenses arranged at intervals along a direction perpendicular to the bending direction of the bending region form lens groups, one end of the light guide member abuts at least one lens of the same group of the lens groups, and the other end of the light guide member extends toward the cover plate;

preferably, the light guide is OCR (optical character recognition) glue or packaging glue;

preferably, the thickness of the light guide is 18 to 20 μm.

6. The display panel of claim 5, wherein a projection of the lens in a thickness direction of the display panel falls within the corresponding light guide;

preferably, a projection area of the lens in the thickness direction of the display panel is smaller than a projection area of the light guide in the thickness direction of the display panel.

7. The display panel according to claim 5, wherein the thickness of the light guide member is gradually reduced from both ends of the spliced region toward a direction approaching a center line of the spliced region.

8. The display panel of claim 5, wherein the light guide assembly further comprises a plurality of light reflecting elements, the light reflecting elements are attached to the side walls of the light guide element, and the light reflecting surfaces of the light reflecting elements face the light guide element;

preferably, the light reflecting member is made of nano silver microparticles;

preferably, the thickness of the light reflecting member is 3-5 μm.

9. The display panel according to claim 8, wherein the light guide assembly further comprises a light shielding member disposed in a gap between two adjacent light reflecting members, and a light guide path extending in a vertical direction is formed between the two adjacent light shielding members;

preferably, the light shielding member is made of PDL light shielding glue;

preferably, the thickness of the light shielding member is 2-5 μm.

10. A display device comprising the display panel according to any one of claims 1 to 9.