LED light board and display device

Abstract

The present invention provides an LED light board and a display device. The LED light board comprises a driving circuit, a substrate and LED devices. The substrate comprises a plurality of regularly arranged LED devices, and the LED devices in two adjacent rows and / or two columns are staggered. The substrate comprises a plurality of partitioned areas composed of LED devices, and the partitioned areas in two adjacent rows and / or two columns are staggered, and the partitioned areas comprise at least two LED devices. In the present invention, on the basis of the staggered arrangement of the LED devices on the substrate, a plurality of partitioned areas are set on the substrate to realize multi-partition backlight of the LED light board. Moreover, the staggered arrangement of the partitioned areas in two adjacent rows in the present invention makes one partitioned area adjacent to a plurality of partitioned areas, and further reduces the backlight mosaic phenomenon when the brightness is controlled by the partitions, so that the brightness of the display device is uniform.

Description

Technical Field

[0001] The present invention relates to the application field of LEDs, and in particular to a partitioned arrangement structure of LED devices and a display device. Background Art

[0002] With the development of LCD TV, people's requirements for TV picture quality have also increased, mainly in terms of high brightness, high contrast, high color gamut, thinness, low energy consumption, etc., so multi-zone backlight has emerged. At present, the backlight can be processed by multi-zone, divided into multiple zones, and the brightness of each zone of the backlight source can be controlled independently to meet the brightness requirements of different zones, making the bright area brighter and the dark area darker, and the contrast will be more perfect. Figure 1 As shown, the current backlight partitions are mainly partitions in which LED devices are arranged in a matrix. One partition is composed of N*N LED devices. Although the LEDs in each partition are theoretically driven with the same current, the difference in brightness of each LED itself and the actual difference in partition current make it easy to form a mosaic effect with uneven brightness between partitions. The brightness uniformity is general, and the regular square partitions are prone to "light leakage" when displaying circular patterns, resulting in poor display effects. Summary of the invention

[0003] The present invention provides an LED light board and a display device, which mainly solve the technical problem that the existing backlight partitions are mainly partitions in which LED devices are arranged in a matrix, and one partition is composed of N*N LED devices. The brightness uniformity is general, and the "light leakage" phenomenon is prone to occur, resulting in poor display effect.

[0004] In order to solve the above technical problems, the present invention provides an LED light board, comprising a driving circuit, a substrate and LED devices, wherein the substrate comprises a plurality of LED devices arranged regularly, and the LED devices in two adjacent rows or / and two columns are arranged in a staggered manner;

[0005] The substrate includes a plurality of partitioned areas formed by the LED devices, each partitioned area includes at least two LED devices, and two adjacent rows and / or partitioned areas are arranged in a staggered manner.

[0006] Optionally, the partitioned area includes two LED devices.

[0007] Optionally, the partitioned area includes three LED devices.

[0008] Optionally, the partitioned area includes four LED devices.

[0009] Optionally, the partitioned area includes five LED devices.

[0010] Optionally, the three LED devices are distributed in three rows and two columns or in two rows and three columns.

[0011] Optionally, the four LED devices are distributed in two rows and four columns or four rows and two columns.

[0012] Optionally, the five LED devices are distributed in two rows and five columns or five rows and two columns.

[0013] Optionally, the substrate includes a first partition area and a second partition area, and the number of LED devices in the first partition area and the second partition area are different.

[0014] Optionally, the first partition area includes five LED devices distributed in three rows and three columns, and the second partition area includes four LED devices distributed in three rows and three columns.

[0015] Furthermore, the present invention also provides a display device, which includes the LED light board described above.

[0016] Beneficial Effects

[0017] The present invention provides an LED light board and a display device. The LED light board comprises a driving circuit, a substrate and LED devices. The substrate comprises a plurality of regularly arranged LED devices, and the LED devices in two adjacent rows and / or two columns are staggered. The substrate comprises a plurality of partitioned areas formed by the LED devices, and the partitioned areas in two adjacent rows and / or two columns are staggered, and the partitioned areas comprise at least two LED devices. In the present invention, on the basis of the staggered arrangement of the LED devices on the substrate, a plurality of partitioned areas are set on the substrate to realize multi-partition backlight of the LED light board. Moreover, the partitioned areas in two adjacent rows and / or two columns are staggered, so that one partitioned area is adjacent to a plurality of partitioned areas, and thus when the brightness is controlled by the partitions, the backlight mosaic phenomenon is reduced, so that the brightness of the display device is uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the partition arrangement of LED devices on a light board provided by the prior art;

[0019] Figure 2 A schematic diagram of an LED light board structure provided in Embodiment 1 of the present invention Figure 1 ;

[0020] Figure 3 A schematic diagram of an LED light board structure provided in Embodiment 1 of the present invention Figure 2 ;

[0021] Figure 4 A schematic diagram of an LED light board structure provided in Embodiment 1 of the present invention Figure 3 ;

[0022] Figure 5A schematic diagram of an LED light board structure provided in Embodiment 1 of the present invention Figure 4 ;

[0023] Figure 6 A schematic diagram of an LED light board structure provided in Embodiment 1 of the present invention Figure 5 ;

[0024] Figure 7 A schematic diagram of an LED light board structure provided in Embodiment 1 of the present invention Figure 6 ;

[0025] Figure 8 A schematic diagram of an LED light board structure provided in Embodiment 1 of the present invention Figure 7 ;

[0026] Fig. 9 A schematic diagram of an LED light board structure provided in Embodiment 1 of the present invention Figure 8 ;

[0027] Fig.10 A schematic diagram of an LED light board structure provided in Embodiment 1 of the present invention Figure 9 ;

[0028] Fig.11 A schematic diagram of the structure of an LED device provided in Embodiment 1 of the present invention;

[0029] Fig.12 A side schematic diagram of an LED light board provided in Embodiment 1 of the present invention;

[0030] Fig.13 A partial schematic diagram of an LED light board provided in Embodiment 2 of the present invention. DETAILED DESCRIPTION

[0031] In order to make the content of the present invention easier to understand, the present invention is further described in detail below through specific implementation methods combined with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0032] Embodiment 1:

[0033] In order to solve the problem that the backlight partition is mainly composed of N*N LED devices arranged in a matrix, the brightness uniformity is generally poor. Figure 2As shown, this embodiment provides an LED light board, which includes a driving circuit (not shown in the figure), a substrate 201 and LED devices 202. The driving circuit is located on the substrate 201 and is used to drive the LED devices 202 on the substrate 201 to emit light; the substrate 201 includes a plurality of regularly arranged LED devices 202, and the LED devices 202 in two adjacent rows and / or columns are staggered, that is, the LED devices 202 in two adjacent rows are located in different columns, and / or the LED devices in two adjacent columns are located in different rows; it can be understood that the number of LED devices 202 in two adjacent rows and / or columns can be different or the same. For ease of understanding, as Figure 2 In this embodiment, the staggered arrangement of LED devices in two adjacent rows is used as an example for explanation; the staggered spacing of any two adjacent rows of LED devices may be different, and the staggered spacing refers to the lateral distance between the nth LED device 202 in a row and the nth LED device 202 in an adjacent row. Preferably, the staggered spacing of any two adjacent rows of LED devices is the same, such as Figure 2 As shown, the lateral distance between the first LED device 202 in the first row and the first LED device 202 in the second row is equal to the lateral distance between the first LED device 202 in the second row and the second LED device 202 in the first row; the substrate 201 includes a plurality of partitioned areas 203 composed of LED devices 202, and the partitioned areas 203 include at least two LED devices 202. Preferably, the area of ​​each partitioned area 203 is the same, and the number of LED devices 202 in each partitioned area 203 can be adjusted according to actual needs, and the arrangement of LEDs in the partitioned areas 203 can also be flexibly adjusted according to the number of LED devices 202. It is worth noting that the partitioned areas 203 of two adjacent rows and / or two columns are staggered. Taking the staggered arrangement of the partitioned areas of two adjacent rows as an example, preferably, the staggered spacing of the partitioned areas 203 of any two adjacent rows is the same, such as Figure 2 As shown, a partitioned area 203 located at the center of the substrate 201 is adjacent to six partitioned areas 203 .

[0034] In this embodiment, the substrate 201 may include only one partitioning method, that is, the plurality of partitioned areas 203 on the substrate 201 are the same; wherein the partitioned area 203 includes at least two LED devices 202. When the partitioned area includes two LED devices, the two LED devices are located on the same oblique line, such as Figure 3 shown.

[0035] When the partition area 203 is composed of three LED devices 202, the LED devices 202 in the partition area 203 are arranged in a triangular shape, so that the light-emitting area formed by the projection of the partition area 203 is more similar to a circle, and the brightness of the partition area 203 is more uniform and the area is larger. Figure 4As shown, the partition area 203 may include three LED devices 202 distributed in three rows and two columns. In this case, the number of LED devices in two adjacent rows is the same, and the offset spacing of the LED devices in any two adjacent rows is the same. Figure 2 As shown, the partitioned area 203 may also include three LED devices 202 distributed in two rows and three columns.

[0036] In this embodiment, a partition area 203 composed of four LED devices 202 is also provided. The partition area 203 includes four LED devices 202 distributed in two rows and four columns. Figure 5 As shown, the LED devices in the partitioned area 203 are arranged in a parallelogram. In this case, any two rows of partitioned areas 203 are arranged in a staggered manner. In some embodiments, the LED devices in the partitioned area 203 can be arranged in a parallelogram with four rows and two columns, such as Figure 6 As shown, at this time, any two columns of partitioned areas 203 are arranged in a staggered manner.

[0037] It can be understood that in this embodiment, the partition area 203 may include five LED devices 202, and the five LED devices 202 are distributed in two rows and five columns, such as Figure 7 As shown, the LED devices in the partition area 203 are arranged in a trapezoidal shape, and the partition areas 203 in two adjacent rows are arranged in a staggered manner; in some embodiments, the LED devices in the partition area 203 can also be arranged in a trapezoidal shape with five rows and two columns, such as Figure 8 As shown, at this time, two adjacent columns of partitioned areas 203 are arranged in a staggered manner.

[0038] It is worth noting that in the present embodiment, the number of LED devices 202 in each partition area is as small as possible, and the brightness of the LEDs in each area is controlled by different circuit partitions. When the number of LED devices in the partition area is small, the brightness coverage of each partition is small, and the brightness difference between the partition areas is not obvious as a whole. The present embodiment only provides examples of common arrangements of two, three, four and five LED devices 202 in a partition area 203. The present invention is not limited to these arrangements. In actual applications, the arrangement of the LED devices 202 in the partition area 203 can be flexibly adjusted according to actual needs.

[0039] In this embodiment, the substrate 201 may further include at least two partitioning modes, and the two partitioning modes correspond to different arrangements of the LED devices 202 in the partitioned areas 203; specifically, Fig. 9 , 10As shown, the substrate 201 includes a first partition area 2031 and a second partition area 2032, and the LED devices 202 in the first partition area 2031 and the second partition area 2032 are arranged differently, wherein the different arrangements of the LED devices 202 in the first partition area 2031 and the second partition area 2032 may be different in the number of LED devices 202 or different in the arrangement of the LED devices 202.

[0040] In this embodiment, when the number of LED devices 202 in the first partition area 2031 and the second partition area 2032 is the same but the arrangement is different, on the basis of staggered arrangement of the LED devices 202, equal area in each partition area 203, and as few LED devices 202 as possible in each partition area 203, the first partition area 2031 is configured to include three LED devices 202 distributed in three rows and two columns, and the second partition area 2032 is configured to include three LED devices 202 distributed in two rows and three columns, such as Fig. 9 As shown, the first partition area 2031 and the second partition area 2032 are located in two adjacent rows.

[0041] Preferably, in this embodiment, an example is provided in which two partitioning modes are included on the substrate 201, and the number of LED devices in the first partition area and the second partition area is different. Specifically, the first partition area 2031 includes five LED devices 202 distributed in three rows and three columns, and the second partition area 2032 includes four LED devices 202 distributed in three rows and three columns. Fig.10 As shown, the first partition area 2031 and the second partition area 2032 are adjacent to each other; based on the staggered arrangement of the LED devices 202, the LED devices 202 in one partition area 2031 are arranged in an "X" shape, and the LED devices 202 in another adjacent partition area 2032 are arranged in a diamond shape. Through the "X" and diamond-shaped arrangement of the LED devices in the partition area 203, the brightness area of ​​the LED devices 202 can cover the surroundings and the center of the partition, so that the brightness of the backlight module is more uniform and the area is larger.

[0042] It should be noted that if Fig.11As shown, the LED device 202 in this embodiment includes a transparent LED bracket 301, an LED chip 302 arranged at the bottom of the transparent LED bracket 301, and the LED chip 302 is electrically connected to the transparent LED bracket 301. The side of the transparent LED bracket 301 is at least transparent, so that the light emitted by the LED chip 302 can at least be emitted from the side of the bracket. The transparent LED bracket 301 can expand the light-emitting angle of the LED device and increase the uniformity of light emission; the LED device 202 also includes a packaging glue layer 303 formed inside the transparent LED bracket 301 and covering the LED chip 302; wherein the packaging glue layer 303 can isolate water vapor on the one hand, and protect the LED chip 302 from moisture. 02 forms protection, on the other hand, the encapsulation glue layer 303 can also expand the emission angle of the LED chip 202 by refraction, so that the light emitted by the LED chip 302 is uniform; a diffusing agent is distributed in the encapsulation glue layer 303, and optionally, the surface of the encapsulation glue layer 303 away from the bottom 301 of the transparent LED bracket is a concave arc surface; for example, the lowest point of the encapsulation glue layer 303 is 10-60μm away from the highest horizontal plane of the encapsulation glue layer 203; the light emitted by the LED chip is refracted by the diffusing agent and the encapsulation glue layer, and the light is uniform, and can be emitted through the side of the transparent bracket, thereby achieving large-angle light emission and uniform light emission, and further thinning the display device including the LED light board.

[0043] In this embodiment, the transparent LED bracket 301 includes a substrate and a wall, wherein at least the wall in the transparent LED bracket 201 is transparent, and the wall can be made of a transparent material, such as a transparent resin, a transparent thermoplastic plastic such as PPA (Polyphthalamide), a transparent thermosetting plastic such as EMC (Epoxy Molding Compound), etc.

[0044] In this embodiment, the LED device, based on the use of a transparent bracket, also includes a misty light-blocking layer 304 arranged above the packaging glue layer 303, wherein the misty light-blocking layer 304 is used to block part of the light directly above the LED device from passing through, thereby weakening the light intensity directly above and increasing the side light output, which can further make the light uniform and thin the display device. Optionally, the misty light-blocking layer does not completely cover the upper surface of the packaging glue layer, such as the misty light-blocking layer is aligned with the center of the packaging glue layer, and the misty light-blocking layer covers 60-95% of the area of ​​the upper surface of the packaging glue layer; optionally, the difference in height between the highest point of the upper surface and the lowest point of the lower surface of the misty light-blocking layer 304 is 10 to 30 μm; wherein the misty light-blocking layer 304 is composed of a mixture of transparent glue and white particles, the transparent glue includes but is not limited to epoxy resin, silica gel, silicone resin, etc., and the white particles include at least one of silicon dioxide, titanium dioxide, calcium carbonate, and boron nitride; optionally, the lower surface of the misty light-blocking layer 304 in contact with the packaging glue layer 303 is a concave surface, and / or, the upper surface of the misty light-blocking layer 304 intersecting with the air is a convex surface.

[0045] It should be noted that in this embodiment, the substrate 201 includes a plurality of LED devices 202 arranged regularly, and a transparent adhesive layer 204 is provided on the surface of the substrate 201. Fig.12 As shown, the thickness of the transparent adhesive layer 204 is not higher than the surface of the LED device 202, and the gaps between the LED devices 202 also include the transparent adhesive layer 204; for example, the transparent adhesive layer 204 on the substrate 201 is lower than the surface of the LED device 202; the transparent adhesive layer 204 on the substrate 201 is equal to the surface of the LED device 202; part of the transparent adhesive layer 204 on the substrate 201 is lower than the surface of the LED device 202, and part is equal to the surface of the LED device 202; the light emitted from the side of the LED device 202 in the transparent adhesive layer is refracted and reflected through the substrate and the surface of the transparent adhesive layer. The light is mixed by the reflected light and the unreflected light in the transparent adhesive layer; because the refractive index of the light in the transparent adhesive layer is greater than the refractive index in the air, when the light emitted from the side of the LED is refracted out of the transparent adhesive layer, the angle between the light emitting direction and the center line of the front of the LED lamp bead increases after the light is refracted, thereby achieving the mixing of the light in the air. Therefore, the LED backlight structure provided in this embodiment first mixes the light through the colloid and then mixes the light through the air, thereby improving the uniformity of the mixed light, further making the light uniform, and thinning the display device including the LED lamp board.

[0046] The present embodiment provides a distribution structure of LED devices, in which the LED devices on the substrate are arranged in a staggered manner. Compared with the matrix arrangement, the number of LED devices on the substrate can be reduced, and the area in each partition area is equal, so as to avoid excessive differences in brightness between the partition areas. At the same time, each partition area is set as little as possible. The present embodiment provides an example of a partition area including two LED devices, three LED devices, four LED devices and five LED devices. Through different arrangements, the center and all sides of the partition area can be illuminated by light, thereby ensuring the brightness uniformity within the partition area; at the same time, two adjacent rows of light-emitting areas are staggered, so that a middle partition area is adjacent to at least 6 partition areas, and then when the brightness is controlled by partition, the backlight mosaic phenomenon can be reduced by reducing the brightness difference between the partition areas, so that the display brightness is uniform.

[0047] Embodiment 2:

[0048] This embodiment provides a more specific LED light board, such as Fig.13 As shown, the substrate 201 includes a number of LED devices 202 arranged regularly, and a layer of transparent colloid is molded on the substrate through a molding process to form a transparent glue layer, and the thickness of the transparent glue layer is lower than the surface of the LED device 202; the LED device 202 includes a transparent LED bracket, an LED chip arranged at the bottom of the transparent LED bracket, and an encapsulation glue layer formed inside the transparent LED bracket and covering the LED chip. A diffusing agent is distributed in the encapsulation glue layer. The light emitted by the LED chip is refracted by the diffusing agent and the encapsulation glue layer, and the light is uniform, and can be emitted from the side of the transparent bracket, thereby realizing large-angle and uniform light emission; the LED device also includes a foggy light-blocking layer arranged above the encapsulation glue layer 303 inside the transparent bracket, which blocks part of the light directly above the LED device from passing through, weakens the light intensity directly above, increases the light emitted from the side, and can further make the light uniform.

[0049] On the basis of the matrix arrangement of the LED devices 202, the LED devices 202 in two adjacent rows and two adjacent columns are arranged in a staggered manner, wherein the staggered distance between any two adjacent rows of LED devices is the same, and the staggered distance between any two adjacent columns of LED devices is the same.

[0050] Based on the staggered arrangement of the above-mentioned LED devices 202, the LED devices 202 on the substrate 201 are partitioned, and the partitioning principle is: the LED devices 202 are staggered, the area in each partition area 203 is equal, and each partition area 203 is provided with as few LED devices 202 as possible, wherein each partition area 203 includes at least two LED devices 202.

[0051] It can be understood that in this embodiment, the substrate 201 may include a single type of partitioned area 203, or may include at least two types of partitioned areas 203, for example, Fig.13 As shown, the substrate 201 includes a first partition area 2031 and a second partition area 2032 of the same shape, the first partition area 2031 and the second partition area 2032 have different numbers of LED devices 202, the shapes of the arrangements of the LED devices 202 in the partition areas are different, and the first partition area 2031 and the second partition area 2032 are adjacent to each other, the five LED devices 202 in the first partition area 2031 are distributed in three rows and three columns, and the four LED devices 202 in the second partition area 2032 are distributed in three rows and three columns; through the "X" and diamond distribution of the LED devices 202 in the partition area 203, the brightness area of ​​the LED devices 202 can cover the surroundings and the center of the partition, thereby ensuring the uniformity of the brightness in the partition.

[0052] It should be noted that the several partitioned areas 203 obtained in the present embodiment are regularly arranged, wherein the partitioned areas 203 of two adjacent columns are staggered, that is, the partitioned areas 203 of two adjacent columns are located in different rows, and the staggered spacing of the partitioned areas 203 of the two adjacent columns is not limited herein. By staggering the partitioned areas 203 of two adjacent columns, one partitioned area 203 is adjacent to multiple partitioned areas 203, and then when controlling the brightness by partition, the backlight mosaic phenomenon can be reduced by reducing the brightness difference of each partitioned area 203, so that the display brightness is uniform.

[0053] Embodiment three:

[0054] This embodiment provides a display device, including the lamp board in the above-mentioned embodiment 1 or embodiment 2, the lamp board includes a driving circuit, a substrate and LED devices, wherein the substrate includes a plurality of regularly arranged LED devices, and the LED devices in two adjacent rows and / or two columns are staggered; the substrate includes a plurality of partitioned areas formed by the LED devices, the partitioned areas include at least two LED devices, and the partitioned areas in two adjacent rows and / or two columns are staggered. The lamp board is as in the above-mentioned embodiment 1 or embodiment 2, and will not be described one by one here. The uniformity of light distribution in the partitioned areas makes the display brightness of the display device uniform.

[0055] In this embodiment, the bracket of the LED device is a transparent bracket, which can expand the light-emitting angle of the LED device and increase the uniformity of light emission, thereby further thinning the display device; further, for the LED device using the transparent bracket, a mist-like light-blocking layer can be added to the top surface of the encapsulation glue layer inside the bracket to weaken the intensity of light emission on the top surface of the LED device and enhance the intensity of light emission on the side of the LED device, thereby further uniformizing the light and thinning the display device. In this embodiment, a transparent glue layer is molded on the substrate to cover the LED lamp beads, thereby further uniformizing the light and thinning the display device.

[0056] The LED light board provided in the above-mentioned embodiment can be applied to various luminous fields. For example, it can be made into a backlight module for display backlight field (it can be a backlight module of a terminal such as a TV, a display, a mobile phone, etc.). At this time, it can be applied to a backlight module. In addition to being applicable to the display backlight field, it can also be applied to the key backlight field, the shooting field, the home lighting field, the medical lighting field, the decoration field, the automotive field, the transportation field, etc. When applied to the key backlight field, it can be used as a key backlight light source for mobile phones, calculators, keyboards, etc. with key devices; when applied to the home lighting field, it can be made into floor lamps, table lamps, lighting lamps, ceiling lamps, downlights, projection lamps, etc.; when applied to the medical lighting field, it can be made into surgical lamps, low electromagnetic lighting lamps, etc.; when applied to the decoration field, it can be made into various decorative lamps, such as various colored lights, landscape lighting lamps, advertising lamps; when applied to the automotive field, it can be made into car lights, car indicator lights, etc.; when applied to the transportation field, it can be made into various traffic lights, and it can also be made into various street lights. The above applications are merely examples of the applications in this embodiment. It should be understood that the application of the LED light board in this embodiment is not limited to the above examples.

[0057] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. An LED light board, comprising a driving circuit, a substrate and an LED device, characterized in that: The substrate includes a plurality of LED devices arranged regularly, and the LED devices in two adjacent rows and / or columns are arranged in a staggered manner; The substrate includes a plurality of partitioned areas formed by the LED devices according to circuit partitions, the partitioned areas include at least two LED devices, and the partitioned areas in two adjacent rows and / or two columns are staggered; the partitioned areas include a first partitioned area and a second partitioned area, the first partitioned area includes five LED devices distributed in three rows and three columns, and the second partitioned area includes four LED devices distributed in three rows and three columns.

2. A display device, characterized in that: The display device comprises the LED light board as described in claim 1.

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