CN220137885U - Spliced display module and display device - Google Patents

Abstract

The utility model provides a spliced display module and a display device, wherein the spliced display module comprises at least two first display units; the second display unit is arranged at the joint of the two first display units; the brightness adjusting layer is arranged on the light emitting side of the second display unit and comprises an echelle grating for adjusting the side view angle brightness of the second display unit. According to the utility model, the brightness adjusting layer comprising the step grating is arranged on the light emitting side of the second display unit, so that the brightness of the side view angle of the second display unit is adjusted, namely the brightness of the light rays emitted by the second display unit after exiting from the brightness adjusting layer under different side view angles is adjusted, so that the brightness of the side view angle of the second display unit is approximately the same as the brightness of the side view angle of the first display unit, the occurrence of bright bands at the spliced position of the spliced display module is prevented, and the uniformity of brightness viewing angles of the first display unit and the second display unit at the spliced position is improved.

Description

Spliced display module and display device

Technical Field

The utility model relates to the technical field of display devices, in particular to a spliced display module and a display device.

Background

With the development of display technology, a seamless tiled display technology has been paid attention to, at present, mainly adopting a structure in which a sub display unit is disposed in a tiled area (non-display area) of a main display unit, and realizing an effect of seamless tiled display by displaying the main display unit and the sub display unit in a linked manner, for example, adopting a Mini light emitting diode (Mini LED, mini Light Emitting Diode) light bar disposed in a tiled position between a plurality of liquid crystal displays (LCD, liquid Crystal Display).

However, under the side view angle, the spliced display module is different in the light-emitting brightness and the view angle brightness attenuation degree of different display units due to the fact that the view angles of different display technologies are different, and the Mini LED display units are spliced between the LCD display units as an example, the Mini LED is brighter under the side view angle, and the LCD is darker under the side view angle, so that when the human eyes watch at a large view angle, the Mini LED display units at the spliced position can be seen to generate a bright band, and the larger the side view angle is, the more obvious the brightness difference is, so that the problem that the brightness and the view angle of the spliced screen are inconsistent at the spliced region is easily caused.

Disclosure of Invention

The utility model provides a spliced display module and a display device, which are used for solving the technical problem that the brightness and visual angles of the spliced display module at the spliced position are inconsistent.

In one aspect, the present utility model provides a tiled display module, including:

at least two first display units;

at least one second display unit, wherein a splice part of the two first display units is provided with one second display unit;

and the brightness adjusting layer is arranged on the light emitting side of the second display unit and comprises an echelle grating for adjusting the side view angle brightness of the second display unit.

In one possible implementation manner of the present utility model, the second display unit includes a plurality of light emitting pixels arranged in an array, and two adjacent light emitting pixels are arranged at intervals;

the brightness adjusting layer comprises a plurality of stepped gratings which are arranged in an array mode, and the stepped gratings are arranged in one-to-one correspondence with the luminous pixels.

In one possible implementation manner of the utility model, the echelle grating comprises a plurality of sub gratings, and two adjacent sub gratings are arranged at intervals;

and the heights of the plurality of sub-gratings are sequentially reduced along the direction that the center of the brightness adjusting layer points to the edge.

In one possible implementation of the utility model, the distance between two adjacent sub-gratings is in the range of 0.02mm-0.1mm.

In one possible implementation of the present utility model, the plurality of sub-gratings are disposed at equal intervals.

In one possible implementation of the present utility model, the brightness adjustment layer includes:

the packaging glue layer is arranged on the light emitting side of the second unit, and the step grating is positioned in the packaging glue layer.

In one possible implementation manner of the present utility model, the brightness adjustment layer further includes:

a substrate arranged on the light emitting side of the second display unit;

the cover plate is arranged on one side of the substrate, which is opposite to the second display unit, the cover plate and the substrate are arranged at opposite intervals, and the packaging adhesive layer is positioned between the substrate and the cover plate.

In one possible implementation manner of the present utility model, the brightness adjustment layer further includes:

and the surface protection layer is arranged on one surface of the cover plate, which is opposite to the substrate.

In one possible implementation manner of the present utility model, the first display unit is a liquid crystal display unit, and the second display unit is a micro light emitting diode direct display unit.

A display device comprises the spliced display module.

On the other hand, the utility model also provides a display device which comprises the backlight module.

The spliced display module comprises at least two first display units and at least one second display unit, wherein the spliced position of the two first display units is provided with the second display unit, and the larger the side view angle is, the larger the brightness attenuation of the first display unit is, so that the brightness difference between the first display unit and the second display unit is more obvious along with the increase of the view angle, and the brightness adjusting layer comprising the stepped grating is arranged on the light emitting side of the second display unit, so that the side view angle brightness of the second display unit can be adjusted through the stepped grating in the brightness adjusting layer, namely, the side view angle brightness of the second display unit is approximately the same as the side view angle brightness of the first display unit after the light rays emitted by the second display unit are emitted from the brightness adjusting layer under different side view angles, thereby being beneficial to preventing the occurrence of bright bands at the spliced position of the spliced display module and improving the uniformity of the brightness view angles of the first display unit and the second display unit at the spliced position.

Drawings

The technical solution and other advantageous effects of the present utility model will be made apparent by the following detailed description of the specific embodiments of the present utility model with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a tiled display module according to an embodiment of the present utility model.

Fig. 2 is a schematic structural diagram of a brightness adjusting layer in a tiled display module according to an embodiment of the present utility model.

Fig. 3 is a schematic structural diagram of a second display unit and a brightness adjusting layer according to an embodiment of the utility model.

Fig. 4 is a schematic structural diagram of a brightness adjusting layer according to an embodiment of the present utility model at a side view angle.

Fig. 5 is a schematic structural diagram of a brightness adjusting layer according to an embodiment of the present utility model at a viewing angle at another side.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, it is to be understood that the terms "first", "second" and "third" may include one or more of the stated features, either explicitly or implicitly. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. It should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, for example, as being directly connected, or indirectly connected through intermediaries, as being internal to two elements or as being in interaction with each other. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

The embodiment of the utility model provides a backlight module and a display device, which are respectively described in detail below.

Referring to fig. 1 to 5, an embodiment of the present utility model provides a tiled display module, including at least two first display units 10, at least one second display unit 20, and a brightness adjusting layer 30.

Illustratively, the number of the first display units 10 is two, and the number of the second display units 20 is one, wherein the second display units 20 are disposed at the splice of the two first display units 10. The first display unit 10 and the second display unit 20 may each be a rectangular display unit.

In other embodiments, when the number of the second display units 20 is two, the two second display units 20 may be disposed on opposite sides of one first display unit 10, or may be disposed on adjacent sides of one first display unit 10, which is not particularly limited in the present utility model.

Wherein the brightness of the second display unit 20 is greater than the brightness of the first display unit 10.

The brightness adjusting layer 30 is disposed on the light emitting side of the second display unit 20, and the brightness adjusting layer 30 includes a step grating 31 to adjust the side view brightness of the second display unit 20. In the present utility model, the light emitting side of the second display unit 20 refers to a side of the second display unit 20 for emitting light to display an image. Specifically, the brightness adjustment layer 30 may be attached to the light emitting side of the second display unit 20.

The spliced display module of the embodiment of the utility model includes at least two first display units 10 and at least one second display unit 20, where the splice of the two first display units 10 is provided with one second display unit 20, and by disposing the brightness adjustment layer 30 including the stepped grating 31 on the light emitting side of the second display unit 20, the greater the side view angle is, the greater the brightness attenuation of the first display unit 10 is, so that the brightness difference between the first display unit 10 and the second display unit 20 becomes more obvious along with the increase of the view angle, and thus the side view angle brightness of the second display unit 20 can be adjusted through the stepped grating 31 in the brightness adjustment layer 30, that is, the brightness of the light emitted by the second display unit 20 after exiting from the brightness adjustment layer 30 under different side view angles is adjusted, so that the side view angle brightness of the second display unit 20 is approximately the same as the side view angle brightness of the first display unit 10, thereby being beneficial to preventing the occurrence of bright bands at the splice of the spliced display module, and improving the uniformity of the view angles of the first display unit 10 and the second display unit 20 at the splice position.

In some embodiments, the first display unit 10 is a liquid crystal display unit, and the second display unit 20 is a micro light emitting diode direct display unit. Specifically, the first display unit 10 may be any one of display units such as an In-Plane Switching (IPS) liquid crystal display unit, a fringe field Switching (Fringe Field Switching, FFS) liquid crystal display unit, and the like. Compared with other types of display units, the liquid crystal display unit has low cost and mature production process.

As shown in fig. 1, the first display unit 10 includes a backlight module 11 and a liquid crystal display panel 12 which are stacked. The first display unit 10 includes a display area 101 and a shading area 102 disposed on at least one side of the display area 101, the shading areas 102 of the two first display units 10 are disposed opposite to each other, the second display unit 20 is located on the light emitting side of the liquid crystal display panel 12, and the second display unit 20 is disposed above the shading areas 102 of the first display unit 10, so as to achieve seamless splicing of the spliced display modules.

The second display unit 20 may be a Micro LED direct display unit or a Mini LED direct display unit. The second display unit 20 includes a driving circuit layer 21 and a plurality of light emitting pixels 22, and the driving circuit layer 21 is used for driving the light emitting pixels 22 to emit light. The second display unit 20 further includes a connection terminal 23 and a control unit 24, where the connection terminal 23 and the control unit 24 are both disposed on a surface of the driving circuit layer 21 opposite to the light emitting pixels 22, the connection terminal 23 is used for connecting an external circuit board, and the control unit 24 is electrically connected with the driving circuit board.

Of course, in other embodiments, the first display unit 10 may also be an Organic Light-Emitting Diode (OLED) display unit, which is not limited herein.

In some embodiments, as shown in fig. 3, the second display unit 20 includes a plurality of light emitting pixels 22 arranged in an array, and two adjacent light emitting pixels 22 are arranged at intervals. Specifically, each of the light emitting pixels 22 may include a red sub-pixel, a green sub-pixel, and a blue sub-pixel.

The brightness adjusting layer 30 includes a plurality of echelons 31 arranged in an array, and the echelons 31 are arranged in one-to-one correspondence with the light emitting pixels 22, i.e. the echelons 31 are also arranged in an array.

In some embodiments, as shown in connection with fig. 2 and 3, the echelle grating 31 includes a plurality of sub-gratings 311, with two adjacent sub-gratings 311 being spaced apart. Specifically, the plurality of sub-gratings 311 are disposed at intervals along the width direction of the brightness adjustment layer 30, wherein the width direction of the brightness adjustment layer 30 and the width direction of the second display unit 20 are disposed in the same direction.

Since the larger the side viewing angle is, the larger the luminance attenuation of the first display unit 10 is, and thus the more obvious the luminance difference between the first display unit 10 and the second display unit 20 increases with the viewing angle, in the embodiment of the present utility model, the plurality of sub-gratings 311 have a certain height in the light emitting direction of the second display unit 20, and thus, in the embodiment of the present utility model, the heights of the plurality of sub-gratings 311 in the echelle grating 31 are sequentially reduced by setting the direction of pointing the center of the luminance adjusting layer 30 to the edge. The greater the height of the sub-grating 311, the greater the side view angle, and the stronger the side view weakening effect of the sub-grating 311. As shown in fig. 4, taking a side view angle of 30 ° as an example, when the light grating is viewed at a side view angle of 30 °, the light grating height will be shielded at a viewing angle of less than 30 °, and more than 30 ° can penetrate, so as to achieve the purpose of reducing the side view brightness of 30 °. As shown in fig. 5, taking a side view angle of 60 ° as an example, when the light grating is viewed at a side view angle of 60 °, the light grating height will be shielded at a viewing angle of 60 ° or less, and 60 ° or more can penetrate, so as to achieve the purpose of reducing the side view brightness of 60 °.

Therefore, the height of the plurality of sub-gratings 311 in the echelle grating 31 is sequentially reduced, so that the brightness difference between the first display unit 10 and the second display unit 20 is further reduced when the side view angle is increased, and the brightness uniformity of the spliced display module is further improved.

In some embodiments, the distance between two adjacent sub-gratings 311 is in the range of 0.02mm-0.1mm.

Since the echelle grating 31 and the light emitting pixels 22 are arranged in a one-to-one correspondence, the pitch of the sub-gratings 311 of the echelle grating 31 in the embodiment of the utility model is also limited by the width of the light emitting pixels 22. Specifically, the distance D between two adjacent sub-gratings 311 may be 0.02mm, 0.04mm, or 0.1mm. Taking the width of the light emitting pixel 22 of the embodiment of the present utility model as an example of 0.8mm, correspondingly, the pitch D of the sub-gratings 311 of the echelle grating 31 may be set to 0.08mm, that is, the number of sub-gratings 311 in each echelle grating 31 is 10.

In the echelon grating 31 of the present utility model, the plurality of sub-gratings 311 have a certain height in the light emitting direction of the second display unit 20, and in the echelon grating 31, the plurality of sub-gratings 311 are disposed along the width direction of the light emitting pixel 22, so by setting the distance D between two adjacent sub-gratings 311, the grating density of the echelon grating 31 is adjusted, and the brightness of the viewing angles of the first display unit 10 and the second display unit 20 in the lateral direction can be made to be consistent, thereby improving the visual difference between the first display unit 10 and the second display unit 20 of the tiled display module at both sides of the width direction of the light emitting pixel 22.

In some embodiments, the plurality of sub-gratings 311 are disposed at equal intervals. Illustratively, the spacing D of each adjacent two sub-gratings 311 is 0.08mm between the plurality of sub-gratings 311.

According to the embodiment of the utility model, the distances among the plurality of sub-gratings 311 are equal, so that the luminous brightness of the second display unit 20 is reduced under different side view angles when the heights of the sub-gratings 311 are fixed, the brightness uniformity of the first display unit 10 and the second display unit 20 is further improved, and meanwhile, the processing and forming of the stepped grating 31 are also facilitated.

In some embodiments, as shown in fig. 4 and 5, the brightness adjustment layer 30 includes an encapsulation glue layer 32. The encapsulation layer 32 is disposed on the light emitting side of the second display unit 20, and the echelle grating 31 is disposed in the encapsulation layer 32.

In the implementation of the present utility model, the step grating 31 is disposed in the encapsulation adhesive layer 32, so that the encapsulation adhesive layer 32 can perform encapsulation and planarization on the step grating 31. Specifically, the material of the encapsulation adhesive layer 32 may be OCA (Optically Clear Adhesive) adhesive, and since the echelle grating 31 is located on the light-emitting side of the second display unit 20, the OCA adhesive has good light transmittance, so that the light-emitting performance of the second display unit 20 can be ensured.

In some embodiments, referring to fig. 4 or 5, the brightness adjustment layer 30 further includes a substrate 33 and a cover plate 34. Wherein the substrate 33 is disposed on the light-emitting side of the second display unit 20; the cover plate 34 is disposed on a side of the substrate 33 facing away from the second display unit 20, the cover plate 34 is disposed opposite to the substrate 33 at a distance, and the encapsulation layer 32 is disposed between the substrate 33 and the cover plate 34.

Specifically, the substrate 33 and the cover plate 34 may be respectively selected from Film materials having high transmittance such as Polyimide Film (PI), polyethylene terephthalate Film (Polyethylene terephthalate, PET), ultra Thin flexible Glass (UTG), and the like. In the embodiment of the present utility model, the material of the substrate 33 and the cover plate 34 is the same. Illustratively, the substrate 33 and the cover plate 34 may each be made of PET.

Of course, in other embodiments, the materials of the substrate 33 and the cover plate 34 may be different, and the present utility model is not particularly limited herein.

In some embodiments, please continue with fig. 4 or fig. 5, the brightness adjustment layer 30 further includes a surface protection layer 35. The surface protection layer 35 is disposed on a surface of the cover 34 facing away from the substrate 33. The surface protection layer 35 may be used to protect the luminance adjusting layer 30, in particular, it is used to protect the cover plate 34, and the respective structural layers between the cover plate 34 and the substrate 33. Since the surface protection layer 35 is also located on the light emitting side of the second display unit 20, the surface protection layer 35 has good light transmittance. Specifically, the material of the protective layer may be an organic material, i.e., may be an organic protective layer. Illustratively, the surface protective layer 35 may be prepared by applying a Hard Coating (HC) to the surface of the cover plate 34. The hardened coating has a high hardness, so that it can effectively protect the cover plate 34 and prevent the cover plate 34 from being scratched by foreign objects.

Of course, in other embodiments, the surface protection layer 35 may also be made of a compressible material such as silicone, rubber, or the like, and has an elastic buffer property, and may also serve as a protection function of the brightness adjustment layer 30.

In order to better implement the tiled display module, the embodiment of the utility model also provides a display device, which comprises the tiled display module. The display device has the same beneficial effects as the spliced display module, and the embodiment is not repeated here.

The application of the display Device in the embodiment of the present utility model is not particularly limited, and may be a handheld Device (smart phone, tablet computer, etc.), a wearable Device (smart bracelet, wireless earphone, smart watch, smart glasses, etc.), a vehicle-mounted Device (navigator, auxiliary reversing system, vehicle recorder, vehicle-mounted refrigerator, etc.), a virtual reality Device, an augmented reality Device, a Terminal Device (Terminal Device), etc., which are not limited herein.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments. In the implementation, each unit or structure may be implemented as an independent entity, or may be implemented as the same entity or several entities in any combination, and the implementation of each unit or structure may be referred to the foregoing method embodiments and will not be repeated herein.

The above description of the embodiment of the present utility model provides a tiled display module and a display device, and specific examples are applied to describe the principles and implementation of the embodiment of the present utility model, where the description of the above embodiment is only used to help understand the technical solution and core idea of the embodiment of the present utility model; those of ordinary skill in the art will appreciate 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 of the utility model.

Claims (10)

1. A splice display module, its characterized in that includes:

at least two first display units;

at least one second display unit, wherein a splice part of the two first display units is provided with one second display unit;

and the brightness adjusting layer is arranged on the light emitting side of the second display unit and comprises an echelle grating for adjusting the side view angle brightness of the second display unit.

2. The tiled display module according to claim 1, wherein the second display element comprises a plurality of light emitting pixels arranged in an array, adjacent two light emitting pixels being arranged at intervals;

the brightness adjusting layer comprises a plurality of stepped gratings which are arranged in an array mode, and the stepped gratings are arranged in one-to-one correspondence with the luminous pixels.

3. The tiled display module according to claim 2, wherein the echelle grating comprises a plurality of sub-gratings, and two adjacent sub-gratings are arranged at intervals;

and the heights of the plurality of sub-gratings are sequentially reduced along the direction that the center of the brightness adjusting layer points to the edge.

4. A tiled display module according to claim 3, wherein the distance between two adjacent sub-gratings is in the range of 0.02mm-0.1mm.

5. The tiled display module according to claim 4, wherein the plurality of sub-gratings are equally spaced.

6. The tiled display module according to claim 1, wherein the brightness adjusting layer comprises:

the packaging glue layer is arranged on the light emitting side of the second unit, and the step grating is positioned in the packaging glue layer.

7. The tiled display module according to claim 6, wherein the brightness adjusting layer further comprises:

a substrate arranged on the light emitting side of the second display unit;

the cover plate is arranged on one side of the substrate, which is opposite to the second display unit, the cover plate and the substrate are arranged at opposite intervals, and the packaging adhesive layer is positioned between the substrate and the cover plate.

8. The tiled display module according to claim 7, wherein the brightness adjusting layer further comprises:

and the surface protection layer is arranged on one surface of the cover plate, which is opposite to the substrate.

9. The tiled display module according to any of claims 1-8, wherein the first display unit is a liquid crystal display unit and the second display unit is a micro led direct display unit.

10. A display device comprising a tiled display module according to any one of claims 1-9.