Splicing light board and display device

Abstract

The application discloses a spliced lamp panel and a display device, and relates to the technical field of display. The spliced lamp panel comprises a first lamp panel and a second lamp panel, the first lamp panel and the second lamp panel are arranged by splicing through a joint, a region of the first lamp panel close to the second lamp panel is a first adjacent joint part, a region of the second lamp panel close to the first lamp panel is a second adjacent joint part, and the first adjacent joint part and the second adjacent joint part are both provided with a plurality of lamp beads; the first adjacent joint part and the second adjacent joint part are both inclined surfaces, the inclination directions of the inclined surfaces of the first adjacent joint part and the second adjacent joint part are both towards the joint, and the inclination angle between the first adjacent joint part or the second adjacent joint part and a horizontal line is a, and 10°≤a≤35°. Through the above design, the problem of spliced dark lines is solved, and the display effect is ensured.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a splicing light panel and a display device. Background Technology

[0002] With the development of display technology, self-emissive display technology has emerged. Micro LED (Micro Light Emitting Diode) is a type of miniature light-emitting diode, which is a more advanced display technology after OLED. Compared with OLED, Micro LED has greatly solved the problem of short lifespan of OLED. It has higher brightness, better luminous efficiency, and lower power consumption.

[0003] Micro LED is still under development, and its future applications include smartwatches, smartphones, tablets, car dashboards and central control systems, and televisions (including large-screen and ultra-large-screen televisions). Large-screen televisions mostly use splicing, but due to the bonding of COF (Chip On Flex, or Chip On Film) and other process structures, there is a phenomenon of no display at the splicing points of the spliced ​​screen, which reduces the visual quality of the Micro LED spliced ​​screen.

[0004] Traditional methods typically involve side-binding or using optics to treat the gaps at the splicing points. However, the results are often unsatisfactory, with dark lines appearing in the spliced ​​area, and the display quality of the spliced ​​area failing to match that of other display areas. Therefore, this is a problem that urgently needs to be solved. Summary of the Invention

[0005] The purpose of this application is to provide a splicing light panel and display device that improves the problem of shadows in splicing and ensures display effect.

[0006] This application discloses a splicing light panel, including a first light panel and a second light panel, which are spliced ​​together by a seam. The area of ​​the first light panel near the second light panel is a first adjacent seam portion, and the area of ​​the second light panel near the first light panel is a second adjacent seam portion. Both the first and second adjacent seam portions are provided with multiple LED beads. Both the first and second adjacent seam portions are inclined surfaces, and the inclination direction of the inclined surface of the first and second adjacent seam portions is towards the seam. The angle between the inclination of the first or second adjacent seam portion and the horizontal line is α, where 10°≤a≤35°.

[0007] Optionally, the splicing light panel further includes a driver chip, which is disposed on the side of the splice seam away from the LED beads;

[0008] The height between the inclined plane and the horizontal plane is greater than or equal to 1 / 3 of the thickness of the first lamp panel or the second lamp panel, and the inclination angle α is ≤ 30°.

[0009] Optionally, the first adjacent seam portion and the second adjacent seam portion are arranged side by side to form a splicing area. The splicing area is provided with multiple grooves, and multiple LED beads correspond one-to-one with the multiple grooves. The LED beads are disposed in the grooves. The width of the groove opening is greater than the width of the groove bottom, and the width gradually decreases along the direction from the groove opening to the groove bottom.

[0010] Optionally, the cross-section of the groove is an inverted trapezoidal structure, the inverted trapezoidal structure includes a first inclined side and a second inclined side, the first inclined side is close to the seam, the second inclined side is far from the seam, and the angle between the first inclined side and the horizontal plane is equal to the angle between the second inclined side and the horizontal plane; the first light panel and the second light panel also include a normal area, and multiple LED beads are also provided in the normal area; the spacing between any two adjacent LED beads in the splicing area is smaller than the spacing between any two LED beads in the normal area; wherein, 30°≤a≤35°.

[0011] Optionally, the cross-section of the groove is an inverted trapezoidal structure, the inverted trapezoidal structure includes a first inclined side and a second inclined side, the first inclined side is close to the seam, the second inclined side is far from the seam, the angle between the first inclined side and the horizontal plane is equal to the angle between the second inclined side and the horizontal plane; the first light panel and the second light panel also include a normal area, the normal area is also provided with multiple LED beads; the spacing between every two adjacent LED beads in the splicing area is equal to the spacing between every two LED beads in the normal area; wherein, 25°≤a≤30°.

[0012] Optionally, the LED bead includes a chip and encapsulating adhesive. The chip is disposed within the groove, and the encapsulating adhesive fills the groove and a portion of the area outside the groove to form an encapsulation structure. The first or second LED board further includes a filling layer, which is disposed on the side of the encapsulation structure away from the chip. In two adjacent grooves, the groove width of the first groove is d1, the distance between the first and second grooves is d2, and the diameter of the encapsulation cross-section of the encapsulation structure is r, where r = d1 + d2.

[0013] Optionally, the filling layer fills the splicing area; wherein, the encapsulation surface of the encapsulation structure is an arc-shaped surface, and the ratio of the refractive index n1 of the encapsulating adhesive to the refractive index n2 of the filling layer satisfies: n1 / n2 = 0.34~0.9; let the incident angle of the light emitted by the lamp bead to the encapsulating adhesive be θ1, and let the exit angle of the light emitted by the lamp bead after passing through the encapsulating adhesive be θ2, then after refraction by the filling layer, the exit angle θ2 is less than or equal to θ1-10°.

[0014] Optionally, the encapsulating adhesive is a first transparent resin, the filling layer is a second transparent resin, and the ratio of the refractive index of the encapsulating adhesive to the refractive index of the filling layer satisfies: n1 / n2 = 1.3:1.8.

[0015] Optionally, the LED bead includes a chip and encapsulating adhesive. The chip is disposed within the groove, and the encapsulating adhesive fills the groove and the splicing area. The splicing LED panel further includes a filling layer disposed on the side of the encapsulating adhesive away from the splicing area. The ratio of the refractive index n1 of the encapsulating adhesive to the refractive index n2 of the filling layer satisfies: n1 / n2 = 0.34–0.9. Let θ1 be the incident angle of the light emitted by the LED bead to the encapsulating adhesive, and θ2 be the exit angle of the light emitted by the LED bead after passing through the encapsulating adhesive. Then, after refraction by the filling layer, the exit angle θ2 is less than or equal to θ1–10°.

[0016] This application also discloses a display device, including a display panel and a splicing light panel as described above, wherein the display panel and the splicing light panel are disposed opposite to each other, and the splicing light panel provides a backlight for the display panel.

[0017] Compared to existing technologies that use side-binding or optical methods to treat the seams at the splicing points, but which still leave dark lines at the splicing points and result in poor overall visual appeal, the splicing light panel of this application includes a first light panel and a second light panel, which are spliced ​​together by a seam. The area of ​​the first light panel near the second light panel is the first adjacent seam section, and the area of ​​the second light panel near the first light panel is the second adjacent seam section. Both the first and second adjacent seam sections are provided with multiple LED beads. Both the first and second adjacent seam sections are inclined surfaces, and the inclination directions of the inclined surfaces of the first and second adjacent seam sections are both towards the seam. Let the inclination angle of the first and second adjacent seam sections be α, where 10°≤a≤35°. This means that the inclined surfaces and the LED beads on the inclined surfaces can work together to supplement the light at the seam, making the light at the seam relatively full, thereby improving the problem of dark lines at the seam. Attached Figure Description

[0018] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0019] Figure 1 This is a schematic diagram of the splicing structure of the first and second light panels of the splicing light panel in this application;

[0020] Figure 2 This is a block diagram of the display device of this application;

[0021] Figure 3 This is a schematic diagram of the structure of the first lamp panel provided in the first embodiment of this application;

[0022] Figure 4 This is a schematic diagram of the LED bead packaging structure in the seam area provided in the second embodiment of this application;

[0023] Figure 5 yes Figure 4 A magnified schematic diagram of a portion of region A;

[0024] Figure 6 This is a schematic diagram of the LED bead packaging structure in the seam area provided in the third embodiment of this application;

[0025] Figure 7 This is a schematic diagram of the groove structure provided in the fifth embodiment of this application.

[0026] Among them, 10 is a display device; 100 is a splicing light panel; 110 is a first light panel; 111 is a first adjacent splicing seam; 120 is a second light panel; 121 is a second adjacent splicing seam; 130 is an LED bead; 131 is a chip; 132 is encapsulating adhesive; 140 is a splicing area; 150 is a groove; 151 is a first bevel; 152 is a second bevel; 160 is a splicing seam; 170 is a driver chip; 180 is a filling layer; 190 is a normal area; and 200 is a display panel. Detailed Implementation

[0027] It should be understood that the terminology, specific structural and functional details used herein are merely for describing particular embodiments and are representative. However, this application may be implemented in many alternative forms and should not be construed as being limited to the embodiments set forth herein.

[0028] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of technical features indicated. Therefore, unless otherwise stated, a feature specified as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. Furthermore, terms indicating orientation or positional relationships, such as "upper," "lower," "left," "right," "vertical," and "horizontal," are described based on the orientation or relative positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description of this application, not indicating that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] Figure 1 This is a schematic diagram of the splicing structure of the first and second light panels of the splicing light panel in this application. Figure 1 As shown, this application discloses a splicing light panel 100, including a first light panel 110 and a second light panel 120. The first light panel 110 and the second light panel 120 are spliced ​​together by a splicing seam 160. The area of ​​the first light panel 110 near the second light panel 120 is a first adjacent splicing seam portion 111, and the area of ​​the second light panel 120 near the first light panel 110 is a second adjacent splicing seam portion 121. Both the first adjacent splicing seam portion 111 and the second adjacent splicing seam portion 121 are provided with a plurality of LED beads 130. Both the first adjacent splicing seam portion 111 and the second adjacent splicing seam portion 121 are inclined surfaces, and the inclination direction of the inclined surface of the first adjacent splicing seam portion 111 and the inclination direction of the inclined surface of the second adjacent splicing seam portion 121 are both towards the splice. The angle of inclination between the first adjacent splicing seam portion 111 or the second adjacent splicing seam portion 121 and the horizontal line is α, where 10°≤α≤35°.

[0030] Compared to existing technologies that use side-binding or optical methods to treat the seams at the splicing points, but which still leave dark lines at the splicing points and result in a poor overall visual appearance, the splicing light panel 100 of this application includes a first light panel 110 and a second light panel 120. The first light panel 110 and the second light panel 120 are spliced ​​together by a splicing seam 160. The area of ​​the first light panel 110 near the second light panel 120 is the first adjacent splicing seam portion 111, and the area of ​​the second light panel 120 near the first light panel 110 is the second adjacent splicing seam portion 121. Both the first adjacent splicing seam portion 111 and the second adjacent splicing seam portion 121 are provided with multiple Each LED bead 130; the first adjacent seam portion 111 and the second adjacent seam portion 121 are both inclined surfaces, and the inclination direction of the inclined surface of the first adjacent seam portion 111 and the inclination direction of the inclined surface of the second adjacent seam portion 121 are both towards the seam 160; wherein, the inclination angle of the first adjacent seam portion 111 and the second adjacent seam portion 121 is α, 10°≤a≤35°, that is, the inclined surface and the LED bead 130 on the inclined surface can cooperate to provide supplementary lighting for the seam 160, so that the light at the seam 160 is relatively full, thereby improving the problem of dark lines at the seam 160.

[0031] Figure 2 This is a block diagram of the display device of this application, as shown below. Figure 2 As shown, this application also discloses a display device 10, including a display panel 200 and a splicing light panel 100 as described above. The display panel 200 and the splicing light panel 100 are disposed opposite to each other, and the splicing light panel 100 provides a backlight for the display panel 200. The display device 10 assembled using the splicing light panel 100 as a backlight module improves the dark line problem of the seam 160 of the splicing light panel 100, thereby improving the display quality. Of course, the splicing light panel can also be a Mini OLED or Micro OLED light panel. The display device 10 can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0032] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments.

[0033] First embodiment:

[0034] Figure 3 This is a schematic diagram of the structure of the first lamp panel provided in the first embodiment of this application, as shown below. Figure 3 As shown, taking the first light panel 110 as an example, combined with... Figure 1The splicing light panel 100 also includes a driver chip 170, which is disposed on the side of the seam 160 away from the LED beads 130. The height between the inclined surface and the horizontal plane is greater than or equal to 1 / 3 of the thickness of the first light panel 110 or the second light panel 120, and the inclination angle α ≤ 30°. In this embodiment, side binding is not used, and the thickness of the first light panel 110 or the second light panel 120 needs to be appropriately increased to meet the requirements of the inclined surface design. Due to the inclined surface design, the length of the first light panel 110 or the second light panel 120 can be made relatively shorter. The length of the inclined surface depends on the size of the seam 160 and the spacing between the LED beads 130, and the selected length should ensure the number of LED beads 130.

[0035] The thickness of the first light panel 110 or the second light panel 120 is d4, the height between the bottom surface of the first light panel 110 or the second light panel 120 and the bottom surface of the inclined surface is d3, and the length of the inclined surface is L. In order to ensure the overall thickness of the light panel and the length of the inclined surface, according to the formula L=(d4-d3) / sina=2(d3-d4), the smaller the angle of inclination of the inclined surface, the longer the length of the inclined surface is required. Through multiple tests and adjustments, when a=30°, the length of the inclined surface is more suitable. While ensuring the brightness at the 160° seam, the overall length of the light panel can also be made relatively small.

[0036] Second embodiment:

[0037] Figure 4 This is a schematic diagram of the LED bead packaging structure in the seam area provided in the second embodiment of this application; Figure 5 yes Figure 4 A magnified schematic diagram of a portion of region A; combined with Figure 4-5 As can be seen, this second embodiment of the present application differs from the first embodiment in that the first adjacent seam portion 111 and the second adjacent seam portion 121 are arranged side by side to form a splicing area 140. The splicing area 140 is provided with a plurality of grooves 150, and a plurality of LED beads 130 correspond one-to-one with the plurality of grooves 150. The LED beads 130 are disposed in the grooves 150. The width of the groove opening of the groove 150 is greater than the width of the groove bottom of the groove 150, and the width gradually decreases along the direction from the groove opening to the groove bottom of the groove 150. Since the LED beads 130 on the inclined surface emit light over a larger distance, the emitting range is relatively larger. Therefore, placing the LED beads 130 in the grooves 150 can limit the angle of their emission, thereby better adjusting the light to be biased towards the seam 160.

[0038] The groove 150 has an inverted trapezoidal cross-section, comprising a first inclined side 151 and a second inclined side 152. The first inclined side 151 is close to the seam 160, and the second inclined side 152 is away from the seam 160. The angle between the first inclined side 151 and the horizontal plane is equal to the angle between the second inclined side 152 and the horizontal plane. The first lamp panel 110 and the second lamp panel 120 also include a normal area 190, which contains multiple LED beads 130. The spacing between any two adjacent LED beads 130 in the splicing area 140 is smaller than the spacing between any two LED beads 130 in the normal area 190, wherein 30°≤a≤35°. Alternatively, the first inclined side 151 and the second inclined side 152 of the groove 150 can be arc-shaped, meaning that the width gradually decreases along the groove opening to the bottom, thus concentrating the light from the LED beads 130 through the groove 150.

[0039] Since the slope angle is relatively large at this time, this design can concentrate the light emission range of the LED 130, so that the light of the LED 130 in the splicing area 140 is more biased towards the splice seam 160 and the light range is relatively large. When multiple LEDs 130 emit light at the same time, it is easy to cause light mixing. Therefore, the groove 150 can be used in conjunction with the encapsulation layer to refract the light towards the splice seam 160 to avoid light mixing.

[0040] Specifically, the LED bead 130 includes a chip 131 and encapsulating adhesive 132. The chip 131 is disposed within the groove 150, and the encapsulating adhesive 132 fills the groove 150 and a portion of the area outside the groove 150 to form an encapsulation structure. The first lamp board 110 or the second lamp board 120 further includes a filling layer 180, which is disposed on the side of the encapsulation structure away from the chip 131. In two adjacent grooves 150, the groove width of the first groove 150 is d1, the distance between the first groove 150 and the second groove 150 is d2, and the diameter of the encapsulation cross-section of the encapsulation structure is r, where r = d1 + d2. That is, the cross-sectional area of ​​the encapsulation of the encapsulating adhesive 132 is larger than the cross-sectional area of ​​the groove 150. Light emitted by the LED bead 130 within the groove 150 can be refracted through the contact surface of the encapsulating adhesive 132 and the filling layer 180 before being emitted, thus concentrating more light.

[0041] like Figure 4As shown, the filling layer 180 fills the splicing area 140; wherein, the encapsulation materials of the first encapsulation layer and the second encapsulation layer are different, and the refractive indexes are also different. The encapsulation surface of the encapsulation structure is an arc surface, which is equivalent to forming a lens structure between the encapsulation glue 132 and the filling layer 180, and can play a refraction function. When the light emitted obliquely passes through this lens structure, the spacing of the light passing through the lens structure is consistent, and the emitted light will be more uniform.

[0042] Moreover, the ratio of the refractive index n1 of the encapsulation glue 132 to the refractive index n2 of the filling layer 180 satisfies: n1 / n2 = 0.34 - 0.9. Let the incident angle of the light emitted by the lamp bead 130 to the encapsulation glue 132 be θ1, and let the exit angle of the light emitted by the lamp bead 130 after passing through the encapsulation glue 132 be θ2. With the incident angle θ1 = 30° and the ratio of the refractive indexes of the two materials n1 / n2 = 1.3:1.8, according to the refraction formula: n1*sinθ1 = n2*sinθ2, after refraction by the encapsulation glue 132, the exit angle θ2 ≈ 20°, that is, when θ2 is less than or equal to θ1 - 10°, the light of the lamp bead 130 can be refracted and converged, avoiding the problem of light mixing.

[0043] Among them, the filling layer 180 fills the inclined surface splicing area and the horizontal plane of the lamp board for subsequent technological processes. The encapsulation glue 132 is a low-refraction epoxy UV glue, and the filling layer 180 is a one-component epoxy UV glue or an organic silicone water. Of course, other encapsulation materials can also be used for the encapsulation glue 132 and the filling layer 180, as long as n1 < n2 is satisfied.

[0044] Third Embodiment:

[0045] Figure 6 It is a schematic diagram of the lamp bead encapsulation structure in the splicing area provided by the third embodiment of the present application. As Figure 6 shown, as the third embodiment of the present application, the difference between this embodiment and the second embodiment is that the encapsulation glue 132 fills the groove 150 and the splicing area 140. The spliced lamp board 100 further includes a filling layer 180, and the filling layer 180 is arranged on the side of the encapsulation glue 132 away from the splicing area 140, that is, after the encapsulation glue 132 fills the splicing area 140, the upper surface of the encapsulation glue 132 and the upper surface of the normal area 190 are on the same horizontal plane, and then a layer of filling layer 180 is laid on this horizontal plane. With such an encapsulation structure and two encapsulation materials with different refractive indexes, the light emitted by the lamp bead 130 chip 131 can also be refracted and converged, while improving the dark line problem of the seam 160 and avoiding light mixing. The specific refraction principle refers to the second embodiment and will not be elaborated here.

[0046] Fourth Embodiment:

[0047] As a fourth embodiment of this application, this embodiment differs from the second embodiment in that the spacing between every two adjacent LED beads 130 in the splicing area 140 is equal to the spacing between every two LED beads 130 in the normal area 190, wherein 25°≤a≤30°. That is, when the inclination angle of the slope is small, the spacing between every two LED beads 130 is equal in both the splicing area 140 and the normal area 190. In this way, the range of light emitted by each LED bead 130 in the splicing area 140 is relatively wide. Through the cooperation between the groove 150 and the slope angle, it is ensured that when the processed light reaches the same height as the horizontal LEDs, the overall spacing is nearly consistent, making the brightness of the entire light panel uniform, thereby ensuring the display effect.

[0048] Fifth embodiment:

[0049] Figure 7 This is a schematic diagram of the groove structure provided in the fifth embodiment of this application, as shown below. Figure 5 As shown, as the fifth embodiment of this application, this embodiment differs from the second and third embodiments in that the inverted trapezoidal structure includes a first inclined side 151 and a second inclined side 152. The first inclined side 151 is close to the seam 160, and the second inclined side 152 is far from the seam 160. The angle between the first inclined side 151 and the horizontal plane is greater than the angle between the second inclined side 152 and the horizontal plane. That is, in the inverted trapezoidal structure, the inclined side close to the seam 160 can reflect or refract the light emitted by the LED 130 that will pass through the seam 160, causing this part of the light to be emitted towards the seam 160. On the other hand, the inclined side far from the seam 160 can reflect or refract the light emitted by the LED 130 that is far from the seam 160, causing more of this part of the light to be emitted towards the seam 160, thereby improving the light utilization rate. After being refracted by the encapsulation layer, this light is emitted more evenly towards the seam 160, which can also improve the problem of dark lines in the seam 160 and avoid light mixing.

[0050] It should be noted that the inventive concept of this application can form many embodiments, but due to the limited space of the application documents, they cannot all be listed. Therefore, without conflict, the embodiments described above or the technical features can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effect will be enhanced.

[0051] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. A splicing light panel, comprising a first light panel and a second light panel, wherein the first light panel and the second light panel are spliced ​​together by a seam, wherein the area of ​​the first light panel near the second light panel is a first adjacent seam portion, and the area of ​​the second light panel near the first light panel is a second adjacent seam portion, wherein both the first adjacent seam portion and the second adjacent seam portion are provided with a plurality of LED beads; characterized in that, Both the first adjacent seam and the second adjacent seam are inclined surfaces, and the inclination direction of the inclined surface of the first adjacent seam and the inclination direction of the inclined surface of the second adjacent seam are both towards the seam; wherein the inclination angle between the first adjacent seam or the second adjacent seam and the horizontal line is α, and 10°≤a≤35°; The first adjacent seam portion and the second adjacent seam portion are arranged side by side to form a splicing area. The splicing area is provided with multiple grooves, and multiple LED beads correspond one-to-one with the multiple grooves. The LED beads are disposed in the grooves. The width of the groove opening is greater than the width of the groove bottom, and the width gradually decreases along the direction from the groove opening to the groove bottom.

2. The splicing light panel according to claim 1, characterized in that, The splicing light panel also includes a driver chip, which is disposed on the side of the splice seam away from the LED beads.

3. The splicing light panel according to claim 1, characterized in that, The groove has an inverted trapezoidal cross-section, which includes a first inclined side and a second inclined side. The first inclined side is close to the seam, and the second inclined side is away from the seam. The angle between the first inclined side and the horizontal plane is equal to the angle between the second inclined side and the horizontal plane. The first lamp panel and the second lamp panel also include a normal area, in which multiple LED beads are also provided; The spacing between any two adjacent LED beads in the splicing area is smaller than the spacing between any two LED beads in the normal area; wherein, 30°≤a≤35°.

4. The splicing light panel according to claim 1, characterized in that, The groove has an inverted trapezoidal cross-section, which includes a first inclined side and a second inclined side. The first inclined side is close to the seam, and the second inclined side is away from the seam. The angle between the first inclined side and the horizontal plane is equal to the angle between the second inclined side and the horizontal plane. The first lamp panel and the second lamp panel also include a normal area, in which multiple LED beads are also provided; The spacing between any two adjacent LED beads in the splicing area is equal to the spacing between any two LED beads in the normal area; wherein, 25°≤a≤30°.

5. The splicing light panel according to claim 1, characterized in that, The lamp bead includes a chip and encapsulating adhesive. The chip is disposed in the groove, and the encapsulating adhesive fills the groove and a portion of the area outside the groove to form an encapsulation structure. The first lamp board or the second lamp board also includes a filling layer, which is disposed on the side of the encapsulation structure away from the chip.

6. The splicing light panel according to claim 5, characterized in that, The filling layer fills the splicing area; wherein, the encapsulation surface of the encapsulation structure is an arc-shaped surface, and the ratio of the refractive index n1 of the encapsulating adhesive to the refractive index n2 of the filling layer satisfies: n1 / n2 = 0.34~0.9; Let θ1 be the incident angle of the light emitted by the LED bead to the encapsulating adhesive, and let θ2 be the exit angle of the light emitted by the LED bead after passing through the encapsulating adhesive. Then, after refraction by the filling layer, the exit angle θ2 is less than or equal to θ1-10°.

7. The splicing light panel according to claim 6, characterized in that, The encapsulating adhesive is a first transparent resin, the filling layer is a second transparent resin, and the ratio of the refractive index of the encapsulating adhesive to the refractive index of the filling layer satisfies: n1 / n2 = 1.3:1.

8.

8. The splicing light panel according to claim 3 or 4, characterized in that, The LED bead includes a chip and encapsulating adhesive. The chip is disposed in the groove, and the encapsulating adhesive fills the groove and the splicing area. The splicing LED board also includes a filling layer, which is disposed on the side of the encapsulating adhesive away from the splicing area. The ratio of the refractive index n1 of the encapsulating adhesive to the refractive index n2 of the filling layer satisfies: n1 / n2 = 0.34 to 0.9; Let θ1 be the angle of incidence of the light emitted by the LED bead to the encapsulating adhesive, and θ2 be the angle of exit of the light emitted by the LED bead after passing through the encapsulating adhesive. Then, after refraction by the filler layer, the angle of exit θ2 is less than or equal to θ1. 10°.

9. A display device, characterized in that, It includes a display panel and a splicing light panel as described in any one of claims 1-8, wherein the display panel and the splicing light panel are disposed opposite to each other, and the splicing light panel provides a backlight for the display panel.

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