Single-row light-emitting backlight module and liquid crystal display

Abstract

The present application relates to a single-row light-emitting backlight module and a liquid crystal display, the backlight module comprising a frame, a lamp plate, a first single-axis symmetric array lens and a second collimating lens; the first single-axis symmetric array lens comprises a first carrier plate and a plurality of first lenses, the first carrier plate is arranged in a receiving cavity and connected with the lamp plate, the mounting surface faces the first carrier plate, the side of the first carrier plate away from the mounting surface is a first light-emitting surface, each first lens is arranged on the first light-emitting surface along the X-axis direction, the projection shape of each first lens on the first carrier plate is an ellipse, the long axis direction of the ellipse is perpendicular to the X-axis direction, the short axis direction of the ellipse is parallel to the X-axis direction, and each first lens is aligned with a lamp bead; the second collimating lens is arranged on the side of the first carrier plate away from the lamp plate. The lamp beads and the first single-axis symmetric array lens are one-to-one corresponding and arranged in a linear shape respectively, the first non-rotationally symmetric lens ensures the light-emitting angle and weakens the obvious degree of the light and dark seams in splicing, thereby ensuring the light-emitting uniformity.

Description

TECHNICAL FIELD

[0001] The present application relates to the backlight technical field, in particular to a single row light-emitting backlight module and liquid crystal display. BACKGROUND

[0002] In the automotive electronics industry, TFT (Thin Film Transistor) LCD (Liquid Crystal Display) is often used as a light source system of HUD (Head Up Display). TFT LCD is a thin film field effect transistor, which is a source matrix type liquid crystal display. It needs to meet the requirements of fast response time and good display quality. The general backlight illumination system cannot meet the requirements. The illumination system in the prior art is composed of a frame, a lamp plate, a primary array lens, a diffusion film and a secondary array lens. The lamp plate provides energy for the entire backlight illumination system. The primary array lens collects the light of the LED lamp on the lamp plate. The diffusion film expands and homogenizes the light from the primary array lens, so that the angle of the light becomes larger. The secondary array lens shrinks the light expanded by the diffusion plate, so that the angle of the light is controlled within the required angle range of the backlight illumination system.

[0003] The entire backlight illumination system has a simple structure, but the number of LEDs is large, generally 4 rows. There are obvious splicing bright and dark seams between adjacent lenses. The secondary array lens appears honeycomb-shaped. The uniformity of the entire backlight illumination system is poor, which affects the imaging quality. The light utilization rate is low, and the diffusion film has high cost. SUMMARY

[0004] Therefore, it is necessary to provide a single row light-emitting backlight module and liquid crystal display.

[0005] A single row light-emitting backlight module, comprising: a frame, a lamp plate, a primary single-axis symmetric array lens and a secondary collimating lens.

[0006] The frame is provided with a receiving cavity. The lamp plate is arranged at one end of the receiving cavity and is fixedly connected with the frame. The lamp plate has a mounting surface. The mounting surface is provided with a column of lamp beads arranged along the X-axis direction.

[0007] The first uniaxial symmetry array lens comprises a first carrier plate and a plurality of first lenses, the first carrier plate is arranged in the accommodating cavity and connected with the lamp panel, the mounting surface faces the first carrier plate, one side of the first carrier plate away from the mounting surface is a first light-out surface, each first lens is arranged on the first light-out surface along the X-axis direction, the projection shape of each first lens on the first carrier plate is an ellipse, the long axis direction of the ellipse is perpendicular to the X-axis direction, the short axis direction of the ellipse is parallel to the X-axis direction, and each first lens is aligned with a lamp bead.

[0008] The second collimating light lens is arranged on the side of the first carrier plate away from the lamp panel, and comprises a second carrier plate and a light-transmitting microstructure arranged on one side of the second carrier plate away from the first carrier plate.

[0009] In one of the embodiments, the lamp panel is provided with clamping grooves at both ends, and the first carrier plate is provided with plug-in columns protruding away from the first light-out surface at both ends, each plug-in column being inserted into a clamping groove.

[0010] In one of the embodiments, one side of the first carrier plate facing the mounting surface is a first light-in surface, and the first light-in surface is recessed to form a plurality of circular arc grooves, each circular arc groove being aligned with a lamp bead.

[0011] In one of the embodiments, the curvature of each circular arc groove is smaller than the curvature of the surface of each first lens.

[0012] In one of the embodiments, the circular arc groove comprises a groove bottom and a groove sidewall, the groove sidewall being arranged around the groove bottom, the width of the groove sidewall being greater than the width of the groove bottom, the depth of the circular arc groove gradually increasing from the groove sidewall to the groove bottom, and the depth being smaller than the thickness of the first lens on the first carrier plate.

[0013] In one of the embodiments, each lamp bead comprises a support, a first LED wafer, a second LED wafer and a packaging adhesive layer, the support comprising a base, a support wall and a transparent side wall, the transparent side wall being arranged around the outer side of the base and connected with the base, the transparent side wall and the inner side of the base forming a mounting groove, the support wall being protrudingly arranged on the base and arranged at the middle part of the base, the first LED wafer being arranged on one side of the support wall, the second LED wafer being arranged on the other side of the support wall, and the packaging adhesive layer being arranged in the mounting groove and covering the first LED wafer and the second LED wafer.

[0014] In one of the embodiments, the first LED wafer and the second LED wafer are arranged as follows:

[0015] The first LED wafer and the second LED wafer of the same lamp bead are arranged along the X-axis direction; or

[0016] The first LED wafer and the second LED wafer of the same lamp bead are arranged along the Y direction, wherein the Y-axis direction is perpendicular to the X-axis direction.

[0017] In one of the embodiments, a heat sink is included, which is connected to one end of the frame through a screw joint, and one side of the heat sink is connected to the side of the lamp panel opposite to the first uniaxial symmetric array lens through a heat-conducting double-sided adhesive tape.

[0018] In one of the embodiments, the heat sink includes a heat sink plate and a plurality of heat sink fins, the heat sink plate is connected to one end of the frame through a screw joint, one side of the heat sink plate is connected to the side of the lamp panel opposite to the first uniaxial symmetric array lens through a heat-conducting double-sided adhesive tape, and each of the heat sink fins is equidistantly arranged on the side of the heat sink plate opposite to the lamp panel.

[0019] A liquid crystal display includes the single-row light-emitting backlight module in any of the above embodiments.

[0020] The present application has the following advantages: the light of the LED lamp on the lamp panel is emitted to the first uniaxial symmetric array lens, the first uniaxial symmetric array lens receives and distributes the light emitted by the LED lamp, the light emitted by the LED lamp can be efficiently utilized, the light is uniformly transmitted within the range of the second collimating lens, the second collimating lens converts the light into collimated light, the lamp bead and the first uniaxial symmetric array lens are one-to-one corresponding and are arranged in a linear shape, the first non-rotationally symmetric lens ensures the light emitting angle, which is about 25° in the X-axis direction and about 15° in the Y-axis direction, so that the brightness uniformity can be ensured when the eyes move left and right and up and down, the obviousness of the joint light and dark seam between the lamp beads is greatly weakened, and the uniformity of the backlight illumination is improved. The single-row light-emitting backlight module in the above embodiments has simple structure, low cost, low light energy loss, and high imaging quality. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without any creative labor.

[0022] Figure 1 It is a perspective structural schematic diagram of the single-row light-emitting backlight module in one embodiment;

[0023] Figure 2 Fig. 1 is a perspective exploded view of a single-row light-emitting backlight module according to an embodiment;

[0024] Figure 3 Fig. 2 is a cross-sectional view of an assembled lamp plate and a first-order uniaxial symmetric array lens according to an embodiment;

[0025] Figure 4 Fig. 3 is a cross-sectional view of a lamp bead according to an embodiment;

[0026] Figure 5 Fig. 4 is a cross-sectional view of a lamp bead according to another embodiment;

[0027] Figure 6A Fig. 5 is a cross-sectional view of a lamp bead bracket and encapsulation layer according to an embodiment;

[0028] Figure 6B Fig. 6 is a cross-sectional view of a lamp bead bracket and encapsulation layer according to another embodiment;

[0029] Figure 6C Fig. 7 is a cross-sectional view of a lamp bead bracket and encapsulation layer according to yet another embodiment;

[0030] Figure 7 Fig. 8 is a light-emitting effect diagram of a single-row light-emitting backlight module according to an embodiment.

[0031] BEST MODE FOR CARRYING OUT THE INVENTION

[0032] 10, single-row light-emitting backlight module; 100, first-order uniaxial symmetric array lens; 200, second-order collimating lens; 300, frame; 400, lamp plate; 301, accommodating cavity; 410, mounting surface; 500, lamp bead; 110, first-order carrier plate; 120, first-order lens; 210, second-order carrier plate; 220, light-transmitting microstructure; 230, arc-shaped protruding light-incident portion; 600, heat sink; 610, heat dissipation plate; 620, heat dissipation fin; 401, clamping groove; 111, insertion column; 112, stepped surface; 113, circular-arc groove; 114, light halo portion; 113a, groove bottom; 113b, groove sidewall; 510, first LED wafer; 520, second LED wafer; 530, bracket; 540, encapsulation layer; 531, base; 532, support wall; 533, transparent sidewall; 501, mounting groove; 534, arc-shaped reflective layer; 535, heat-conducting hole; 550, metal heat-conducting member. DETAILED DESCRIPTION

[0033] With reference to the drawings and embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0034] As shown in FIG. 1, which is a single-row light-emitting backlight module 10 according to an embodiment of the present application, comprising a frame 300, a lamp plate 400, a first single-axial symmetric array lens 100 and a second collimating lens 200. Figure 1 Figure 2 The frame 300 is provided with a receiving cavity 301, the lamp plate 400 is arranged at one end of the receiving cavity 301 and fixedly connected with the frame 300, the lamp plate 400 has a mounting surface 410, and a row of lamp beads 500 arranged along the X-axis direction is arranged on the mounting surface 410.

[0035] The first single-axial symmetric array lens 100 comprises a first carrier plate 110 and a plurality of first lenses 120, the first carrier plate 110 is arranged in the receiving cavity 301 and connected with the lamp plate 400, the mounting surface 410 faces the first carrier plate 110, one side of the first carrier plate 110 away from the mounting surface 410 is a first light-emitting surface, each first lens 120 is arranged on the first light-emitting surface along the X-axis direction, the projection shape of each first lens 120 on the first carrier plate 110 is an ellipse, the long axis direction of the ellipse is perpendicular to the X-axis direction, the short axis direction of the ellipse is parallel to the X-axis direction, and each first lens 120 is aligned with one lamp bead 500.

[0036] The second collimating lens 200 is arranged on the side of the first carrier plate 110 away from the lamp plate 400, the second collimating lens 200 comprises a second carrier plate 210 and a light-transmitting microstructure 220, and the light-transmitting microstructure 220 is arranged on one side of the second carrier plate 210 away from the first carrier plate 110.

[0037] The second collimating lens 200 is arranged on the side of the first carrier plate 110 away from the lamp plate 400, the second collimating lens 200 comprises a second carrier plate 210 and a light-transmitting microstructure 220, and the light-transmitting microstructure 220 is arranged on one side of the second carrier plate 210 away from the first carrier plate 110.

[0038] ​In the embodiment, the frame 300 is used to support the lamp plate 400 and the lenses, the frame 300 is hollow frame-shaped, and an accommodating cavity 301 is formed on the inner side. For example, the frame 300 is defined as the Z-axis direction along the depth direction, the frame 300 has a bottom end and a top end, the bottom end to the top end direction is the Z+ direction, and the top end to the bottom end is the Z- direction. The lamp plate 400 is installed at the bottom end of the frame 300, the second collimating lens 200 is installed at the top end of the frame 300, the lamp beads 500 emit light towards the top end direction of the frame 300, and the light emitted by the lamp beads 500 is emitted to the outside in turn through the first single-axial symmetric array lens 100 and the second collimating lens 200, thereby providing backlight for the liquid crystal display.

[0039] In one embodiment, please combine Figure 1 and Figure 2 The single-row light-emitting backlight module 10 further comprises a heat sink 600 connected to one end of the frame 300 through a screwing piece, and one side of the heat sink 600 is connected to the side of the lamp plate 400 away from the first single-axial symmetric array lens 100 through a heat-conducting double-sided adhesive tape.

[0040] In the embodiment, the heat sink 600 is an aluminum alloy heat sink 600.

[0041] In the embodiment, during installation, firstly, the first single-axial symmetric array lens 100 and the lamp plate 400 are installed and connected in alignment, so that the mounting surface 410 of the lamp plate 400 faces the first single-axial symmetric array lens 100, then the first single-axial symmetric array lens 100 and the lamp plate 400 are loaded into the frame 300 close to the bottom end in the direction of Z+, the heat-conducting double-sided adhesive tape is pasted on the side of the lamp plate 400 away from the first single-axial symmetric array lens 100, the heat sink 600 is pasted on the heat-conducting double-sided adhesive tape, the four connecting holes on the heat sink 600 are aligned with the four screw holes at the bottom end of the frame 300, the screwing member is screwed into the screw hole through the connecting hole, the heat sink 600 is fixed on the frame 300, and the heat sink 600 tightly fixes the lamp plate 400 and the first single-axial symmetric array lens 100 on the frame 300. Then, the second collimating light lens 200 is loaded into the frame 300 from the direction of Z-. In the embodiment, the inner side of the frame 300 is provided with positioning structures corresponding to the lamp plate 400, the first single-axial symmetric array lens 100 and the second collimating light lens 200, respectively, for positioning the lamp plate 400, the first single-axial symmetric array lens 100 and the second collimating light lens 200, so that the components can be fixed in the frame 300 and are prevented from being displaced. For example, the top end of the frame 300 is provided with a positioning column, the two ends of the second collimating light lens 200 are provided with fixing ears, each fixing ear is provided with a positioning hole or a positioning slot, and the positioning column is inserted into the positioning hole or the positioning slot. It is worth mentioning that the lamp plate 400 can also be fixed by using a similar structure as described above, which is not described in detail in the embodiment.

[0042] In the embodiment, the projection shape of the first lens 120 on the first carrier plate 110 is an ellipse, wherein the long axis direction of the ellipse is perpendicular to the arrangement direction of the lamp beads 500, and the short axis direction is parallel to the arrangement direction of the lamp beads 500, so that the first lens 120 has a large length in the long axis direction, which is beneficial to diffuse light in the long axis direction, and the width of the first lens 120 in the short axis direction is small, so that the diffusion range of each first lens 120 in the X-axis direction is small, and the light of adjacent lamp beads 500 can be staggered in a small range, which is beneficial to weaken the obvious degree of the joint bright-dark seam between the lamp beads 500. It is worth mentioning that since the lamp beads 500 are arranged along the X-axis direction, the light-emitting ranges of the lamp beads 500 are connected in the X-axis direction, so that the light-emitting range in the X-axis direction is large, and in the Y-axis direction perpendicular to the X-axis, since the length of the first lens 120 in the Y-axis direction is greater than the width in the X-axis direction, even if the first lens 120 is not arranged in the Y-axis direction, the light can be fully diffused to the Y-axis direction, so that the single-row light-emitting backlight module 10 ensures a large light-emitting angle in the X-axis and Y-axis directions.

[0043] In the embodiment, the first uniaxial symmetric array lens 100 can also be referred to as a first non-rotationally symmetric array lens. The first uniaxial symmetric array lens 100 is easier to control backlight uniformity, and the second collimating light lens 200 can better receive light of the first non-rotationally symmetric lens and convert the light into collimated parallel light. The first lenses 120 on the first uniaxial symmetric array lens 100 are arranged in a linear equidistant manner and correspond to positions of the lamp beads 500, so that the light source of the lamp panel 400 can be more effectively utilized. The light in and out surfaces of the first uniaxial symmetric array lens 100 are non-rotationally symmetric surface types, and the surface types can be designed according to different light angle requirements in X and Y directions.

[0044] It is worth mentioning that the first uniaxial symmetric array lens 100 and the second collimating light lens 200 are made of transparent optical materials such as PC, PMMA or glass. In an embodiment, the first uniaxial symmetric array lens 100 and the second collimating light lens 200 are made of PC, PMMA or glass. In an embodiment, the first uniaxial symmetric array lens 100 and the second collimating light lens 200 are transparent PC lenses. The PC lens has relatively stable characteristics and will not cause changes in the surface type and color of the first uniaxial symmetric array lens 100 due to temperature changes during operation of the lamp panel 400.

[0045] The first uniaxial symmetric array lens 100 receives and distributes light emitted by the LED lamp, can efficiently utilize light emitted by the lamp bead 500, and uniformly hits the second collimating light lens 200. The second collimating light lens 200 converts the light into collimated light and emits the light through the microstructure light out surface, so that the angle of the light is controlled within the required angle range of the backlight illumination system. The backlight illumination system has a simple structure, low cost, low light energy loss, and ensures light uniformity and high imaging quality.

[0046] In the above embodiment, light of the LED lamp on the lamp panel 400 is emitted to the first uniaxial symmetric array lens 100. The first uniaxial symmetric array lens 100 receives and distributes light emitted by the LED lamp, can efficiently utilize light emitted by the LED lamp, and uniformly transmits the light within the range of the second collimating light lens 200. The second collimating light lens 200 converts the light into collimated light. The lamp bead 500 and the first uniaxial symmetric array lens 100 correspond to each other and are arranged in a linear manner. The first non-rotationally symmetric lens ensures the light emitting angle, which is about 25° in the X-axis direction and about 15° in the Y-axis direction, so that the brightness uniformity can be ensured when the eyes move left and right and up and down. The splicing bright-dark seam between the lamp beads 500 is significantly weakened, and the backlight illumination uniformity is improved. The single-row light-emitting backlight module 10 has a simple structure, low cost, low light energy loss, and ensures light uniformity and high imaging quality.

[0047] In order to fix the primary carrier plate 110 to the lamp plate 400, in one embodiment, such as Figure 3 As shown, the lamp board 400 has a snap-fit ​​groove 401 at both ends, and the first-stage carrier plate 110 has a plug-in post 111 protruding from both ends along the direction away from the first-stage light-emitting surface. Each plug-in post 111 is inserted into a snap-fit ​​groove 401.

[0048] In this embodiment, the protruding insertion post 111 on the primary carrier plate 110 is inserted into the snap-fit ​​groove 401 of the lamp board 400, thereby fixing the connection. Furthermore, in this embodiment, the width of the insertion post 111 gradually increases from the end furthest from the primary carrier plate 110 to the end closest to the primary carrier plate 110. This results in a smaller width at the end of the insertion post 111, which facilitates insertion into the snap-fit ​​groove 401. As the width of the insertion post 111 increases, the friction between the insertion post 111 and the sidewall of the snap-fit ​​groove 401 increases, thereby ensuring that the insertion post 111 can be securely inserted into the snap-fit ​​groove 401. Furthermore, the width of the end of the plug-in post 111 near the primary carrier plate 110 is greater than the width of the snap-fit ​​groove 401. This prevents the plug-in post 111 from being fully inserted into the snap-fit ​​groove 401, thus maintaining a certain distance between the primary carrier plate 110 and the lamp board 400. This allows the primary carrier plate 110 to maintain the spacing between itself and the lamp beads 500 on the lamp board 400. In one embodiment, a stepped surface 112 is provided in the middle of the plug-in post 111. The width of the stepped surface 112 is greater than the width of the snap-fit ​​groove 401, and the stepped surface 112 abuts against the mounting surface 410 of the lamp board 400. By providing the stepped surface 112, the plug-in post 111 can be prevented from being over-inserted into the snap-fit ​​groove 401, and the distance between the lamp board 400 and the primary carrier plate 110 can be accurately set.

[0049] In order to ensure that the light from the LED 500 can be uniformly diffused to the primary lens 120, in one embodiment, such as Figure 3 As shown, the side of the primary carrier plate 110 facing the mounting surface 410 is the primary light-incident surface. The primary light-incident surface is recessed with a plurality of arc grooves 113, and each arc groove 113 is aligned with one of the lamp beads 500.

[0050] In this embodiment, the arc groove 113 can increase the area aligned with the lamp bead 500, which is beneficial for fully receiving the light from the lamp bead 500. The light is then transmitted through the arc-shaped surface into the interior of the primary carrier plate 110, and then diffused at a wider angle, penetrating the primary carrier plate 110 and spreading to the primary lens 120. The primary lens 120 further expands the diffusion angle, allowing the light to diffuse over a wide range, thereby further reducing and weakening the obviousness of the bright and dark seams between the lamp beads 500 and making the backlight uniformity better.

[0051] In one embodiment, the curvature of each of the circular arc grooves 113 is smaller than the curvature of the surface of each of the primary lenses 120. In this embodiment, the curvature of the circular arc grooves 113 is flatter than the surface of the primary lenses 120, and the surface of the primary lenses 120 is more curved. In this way, on the one hand, the flatter circular arc grooves 113 can receive light from the lamp beads 500 in a larger range, and the diffusion range is larger, and the primary lenses 120 with larger curvature not only can diffuse light, but also have a certain light condensing function, improving the brightness.

[0052] In one embodiment, referring again to Figure 3 , the primary light-emitting surface of the primary carrier plate 110 is provided with a light halo portion 114, which is in a semispherical or arc shape, and is arranged in the primary lens 120. The circular arc groove 113 includes a groove bottom 113a and a groove sidewall 113b. The groove bottom 113a is arranged in alignment with the light halo portion 114. The groove sidewall 113b is arranged around the groove bottom 113a. The coverage range of the groove sidewall 113b is outside the light halo portion 114. The width of the groove sidewall 113b is greater than the width of the groove bottom 113a. The depth of the circular arc groove 113 gradually increases from the groove sidewall 113b to the groove bottom 113a. The depth of the circular arc groove 113 is greater than the thickness of the light halo portion 114, and is less than the thickness of the primary lens 120 on the primary carrier plate 110.

[0053] In this embodiment, the groove bottom 113a is aligned with the lamp bead 500, and the light emitted by the lamp bead 500 can directly pass through the groove bottom 113a into the primary carrier plate 110. Due to the width of the groove sidewall 113b being greater than the width of the groove bottom 113a, the curvature of the groove sidewall 113b can absorb light emitted by the lamp bead 500 in a larger range and diffuse it to the primary carrier plate 110 through the arc-shaped groove sidewall 113b. It is worth mentioning that the depth of the circular arc groove 113 is greater than the thickness of the light halo portion 114 but less than the thickness of the primary lens 120. The reason is that the arc-shaped recess of the circular arc groove 113 not only diffuses the light of the lamp bead 500 but also increases the spacing distance with the lamp bead 500, thereby facilitating the diffusion of light. On the other hand, the light halo portion 114 is arranged on the position opposite to the circular arc groove 113 on the primary carrier plate 110, which can balance the refraction loss caused by the reduced thickness of the primary carrier plate 110 at this position. The protruding light halo portion 114 is equivalent to a small lens, and the light halo portion 114 and the primary lens 120 are equivalent to two-stage lenses. Since the light halo portion 114 and the primary lens 120 are very close, the light undergoes two-stage refraction in a short distance, forming a light halo effect similar to two layers of circular rings. The produced light halo can make the light produced by adjacent lamp beads superimposed in the X-axis direction, forming stripes with alternating bright and dark areas. Compared with the original dark seam, although the difference between the bright and dark areas is increased, the width of the stripes with alternating bright and dark areas is smaller. The width of the stripes with alternating bright and dark areas is smaller, and the difference between the stripes with alternating bright and dark areas has been weakened to the extent that the naked eye cannot distinguish it after the light passes through the light-transmitting microstructure 220. Therefore, through the two-stage light halo portion 114 and the primary lens 120, the light can be diffused in a larger range, so that the light between adjacent lamp beads 500 can be interlaced and superimposed, effectively decomposing the relatively wide bright and dark seam between the lamp beads in the X-axis direction into stripes with alternating bright and dark areas with smaller size. Combined with the light-transmitting microstructure 220 of the secondary collimating lens 200, the obviousness of the splicing bright and dark seam between the lamp beads 500 is greatly weakened. It is worth mentioning that the diffusion structure of the two-stage light halo portion 114 and the primary lens 120 is suitable for the backlight structure of a single row of lamp beads. The structure of multiple rows of lamp beads will also produce stripes with alternating bright and dark areas in the Y-axis direction. Compared with the stripes with alternating bright and dark areas in a single direction, the stripes with alternating bright and dark areas in different directions are more difficult to eliminate. The light-transmitting microstructure 220 of the secondary collimating lens 200 cannot sufficiently weaken these stripes, resulting in poor light output effect. Therefore, in this embodiment, the structure of the light halo portion 114 and the primary lens 120 can effectively weaken the obviousness of the splicing bright and dark seam for the backlight module structure of a single row of lamp beads.

[0054] In addition, the receiving and diffusion of the light by the arc-shaped groove 113 can expand the distance between the two annular rings of the light halo generated by the halo part 114 and the primary lens 120, so that the width of the light and dark stripes generated by the light halo of the adjacent lamp beads increases slightly after superposition, and the light and dark difference decreases, thereby further weakening the obviousness of the light and dark joint between the lamp beads 500 and the lamp beads 500.

[0055] To further weaken and reduce the obviousness of the light and dark joint between the lamp beads, in an embodiment, as shown in Figure 4 each lamp bead 500 includes a bracket 530, a first LED wafer 510, a second LED wafer 520, and a packaging glue layer 540. The bracket 530 includes a base 531, a support wall 532, and a transparent side wall 533. The transparent side wall 533 surrounds the outer side of the base 531 and is connected with the base 531. The transparent side wall 533 and the inner side of the base 531 form a mounting groove 501. The support wall 532 is protrudingly arranged on the base 531 and arranged at the middle part of the base 531. The first LED wafer 510 is arranged on one side of the support wall 532. The second LED wafer 520 is arranged on the other side of the support wall 532. The packaging glue layer 540 is filled in the mounting groove 501 and covers the first LED wafer 510 and the second LED wafer 520.

[0056] In the embodiment, the first LED wafer and the second LED wafer 520 are arranged in the bowl-shaped bracket 530. The base 531 is arranged on the lamp panel 400. The support wall 532 is used to support the first LED wafer 510 and the second LED wafer 520, so that the first LED wafer 510 and the second LED wafer 520 are arranged on the opposite sides of the support wall 532 and emit light in opposite directions, which is beneficial to increase the light emitting range and the light emitting brightness. In the embodiment, the transparent side wall 533 surrounds the first LED wafer 510 and the second LED wafer 520. The transparent side wall 533 can not only transmit the light of the LED wafer, but also reflect part of the light of the LED wafer. One side of the transparent side wall 533 towards the support wall 532 is arranged obliquely. Specifically, one side of the transparent side wall 533 towards the support wall 532 is gradually inclined to the outside of the mounting groove 501 from the end close to the base 531 to the end away from the base 531. In this way, the transparent side wall 533 can reflect the light of the LED wafer to a larger range. In addition, in the embodiment, the packaging glue layer 540 encapsulates the first LED wafer 510 and the second LED wafer 520, which can protect the first LED wafer 510 and the second LED wafer 520, and also can play a lens role to diffuse the light of the first LED wafer 510 and the second LED wafer 520.

[0057] In one embodiment, the first LED wafer 510 and the second LED wafer 520 are arranged in the same lamp bead 500 in the X-axis direction or in the Y-axis direction, wherein the Y-axis direction is perpendicular to the X-axis direction.

[0058] In one embodiment, the first LED wafer 510 and the second LED wafer 520 are arranged in the same lamp bead 500 in the X-axis direction.

[0059] In this embodiment, the first LED wafer 510 and the second LED wafer 520 on the same lamp bead 500 are respectively directed to two opposite directions of the X-axis, for example, the first LED wafer 510 is directed to the X- direction, and the second LED wafer 520 is directed to the X+ direction. In this way, the light emitted by the LED wafers on the adjacent lamp beads 500 converges in the X-axis direction through the diffusion of the primary lens 120, so that the light between the lamp beads 500 increases, and the brightness of the dark part of the bright and dark joint between the lamp beads 500 is enhanced, thereby further weakening the obviousness of the bright and dark joint between the lamp beads 500.

[0060] In one embodiment, the first LED wafer 510 and the second LED wafer 520 are arranged in the same lamp bead 500 in the Y-axis direction, wherein the Y-axis direction is perpendicular to the X-axis direction.

[0061] In this embodiment, the first LED chip 510 and the second LED chip 520 on the same LED bead 500 face two opposite directions along the Y-axis. For example, the first LED chip 510 faces the Y- direction, and the second LED chip 520 faces the Y+ direction. The light emission direction of each LED chip is perpendicular to the arrangement direction of the LED beads 500. Since the LED beads 500 are arranged along the X-axis, the light emission range in the X-axis direction is large. Furthermore, since each LED chip faces the Y-axis, the light emission range of the single-row backlight module 10 in the Y-axis direction is also large. Therefore, the single-row backlight module 10 as a whole has a large light emission and display range in both the X-axis and Y-axis directions. It is worth mentioning that in the above embodiment, while the LED chips emitting light in the X-axis direction can compensate for the dark gaps between LED beads 500, it cannot guarantee the light emission range of the single-row backlight module 10 in the Y-axis direction. Therefore, in this embodiment, setting the light emission direction of each LED chip to face either the Y- or Y+ direction can fully guarantee the light emission range of the single-row backlight module 10 in the Y-axis direction. Furthermore, in this embodiment, the LED chip faces the Y-axis direction, but through the reflection of the transparent sidewall 533 and the diffusion of the arc groove 113, the halo part 114 and the first-stage lens 120, the insufficient light between the LED chips 500 in the X-axis direction can be compensated, so that the dark gap between the LED chips 500 is compensated by light, thereby making the dark gap between the LED chips 500 less obvious.

[0062] To further minimize the gap between LED beads 500 and LED beads 500 in the X-axis direction, in one embodiment, such as Figure 5 As shown, the first LED chip 510 and the second LED chip 520 of the same lamp bead 500 are arranged along the Y direction. The width of the mounting groove 501 on the X-axis is greater than its width on the Y-axis. The bottom of the mounting groove 501 is provided with arc-shaped reflective layers 534 protruding on both sides of the support wall 532 in the X-axis direction. The cross-section of the support wall 532 in the direction perpendicular to the X-axis is trapezoidal. The width of the support wall 532 gradually decreases from the end near the base 531 to the end away from the base 531. The first LED chip 510 gradually tilts towards the outside of the mounting groove 501 from the end away from the base 531 to the end near the base 531. The second LED chip 520 gradually tilts towards the outside of the mounting groove 501 from the end away from the base 531 to the end near the base 531.

[0063] In the embodiment, the first LED wafer 510 and the second LED wafer 520 on the same lamp bead 500 are respectively directed to two opposite directions of the Y axis, so that the light emitting range in the Y axis direction can be effectively increased. In addition, since the first LED wafer 510 and the second LED wafer 520 are respectively inclined to the inside of the mounting groove 501 from one end close to the bottom of the mounting groove 501 to the other end away from the mounting groove 501, the first LED wafer 510 and the second LED wafer 520 can emit light along the direction of inclination upward in the drawing, so that the light emitting angle of the first LED wafer 510 and the second LED wafer 520 in the Y axis direction is larger, and the problem of dark seam existing in the middle due to the opposite light emitting of the two LED wafers is avoided. It is worth mentioning that since the lamp beads 500 are arranged in sequence in the X axis direction, the light emitting range and the light emitting angle in the X axis direction are larger, and the main problem in the X axis direction is the splicing bright and dark seam, and there is no problem of splicing bright and dark seam in the Y axis direction. Since the lamp bead 500 scheme of the lamp beads 500 arranged in a line is adopted in the application, the main problem in the Y axis direction is that the light emitting angle is not large enough, and in the embodiment, the two LED wafers are inclined to be arranged, which can effectively increase the light emitting angle in the Y axis direction and avoid the problem of dark seam existing in the middle due to the opposite light emitting of the two LED wafers in the Y axis direction. In addition, since the two LED wafers are inclined to be arranged, the light can be diffused upward and outward, and part of the light can be emitted toward the lamp beads 500, so as to compensate the brightness of the dark seam between the lamp beads 500 in the X axis direction. Since the bottom of the mounting groove 501 is provided with a reflective layer on both sides of the support wall 532, and the shape of the reflective layer is arc-shaped, the light emitted by the two LED wafers is reflected at the bottom of the mounting groove 501 and in the X axis direction, which can effectively compensate the brightness of the splicing bright and dark seam in the X axis direction, so as to weaken the degree of the splicing bright and dark seam. In addition, since the width of the mounting groove 501 in the X axis direction is larger than that in the Y axis direction, the mounting groove 501 has a larger reflection and diffusion range in the X axis direction, which can sufficiently compensate the brightness of the dark seam, so as to further weaken the obvious degree of the splicing bright and dark seam. In addition, since the two LED wafers are inclined to be arranged, the overall light emitting position is closer to the bottom of the mounting groove 501 and closer to the reflective layer, so that the reflection effect is better. In this way, in the embodiment, the light emitting range of the lamp bead 500 in the Y axis direction can be effectively increased, and the dark seam between the adjacent lamp beads 500 in the X axis direction can be compensated.

[0064] In one embodiment, the base 531 is provided with a heat-conducting hole 535 in the lower surface of the arc-shaped reflective layer 534, and the radial cross section of the arc-shaped reflective layer 534 is parallel to the Y-axis direction, one end of the heat-conducting hole 535 penetrates to the support wall 532, and the other end penetrates to the outside surface of the base 531, the inside of the support wall 532 is provided with a metal heat-conducting member 550, one end of the metal heat-conducting member 550 is arranged in the inside of the support wall 532 and between the first LED wafer 510 and the second LED wafer 520, the other end of the metal heat-conducting member 550 extends to the heat-conducting hole 535 and along the heat-conducting hole 535 to the outside of the base 531, and the width of the metal heat-conducting member 550 is smaller than the width of the heat-conducting hole 535.

[0065] It is worth mentioning that the LED wafer emits a large amount of light heat, and since the first LED wafer 510 and the second LED wafer 520 are arranged in the lamp bead 500 at the same time, the heat of the lamp bead 500 will be too high, which will affect the performance and service life of the lamp bead 500. In the embodiment, since the cross-sectional shape of the support wall 532 is trapezoidal, the distance between the first LED wafer 510 and the second LED wafer 520 gradually increases along the direction close to the base 531, effectively avoiding heat accumulation, and by arranging the metal heat conduction piece 550 in the support wall 532 for heat conduction, the metal heat conduction piece 550 absorbs the heat of the first LED wafer 510 and the second LED wafer 520, and is conducted into the heat conduction hole 535, and is conducted to the inner side of the metal heat conduction piece 550 away from the base 531, so that the heat can be efficiently dissipated. In addition, since the width of the heat conduction hole 535 is large, for example, the ratio of the cross-sectional area of the metal heat conduction piece 550 to the cross-sectional area of the heat conduction hole 535 is 1:2 or 1:3, so as to facilitate the circulation of air, so that the heat of the support wall 532 can also be dissipated to the outside through the heat conduction hole 535. It is worth mentioning that in order to ensure the sealing performance of the packaging glue layer 540, generally speaking, it is necessary to avoid opening holes in the packaging glue layer 540 to avoid the invasion of external air and moisture into the LED wafer, and also to avoid the poor light transmission and diffusion effect caused by opening holes in the packaging glue layer 540. Therefore, in the embodiment, no holes are opened in the packaging glue layer 540, but the heat conduction hole 535 is extended to the support wall 532, so as to ensure that the packaging glue layer 540 can fully seal the mounting groove 501, and the heat conduction hole 535 is prevented from being communicated with the mounting groove 501, so that the heat conduction hole 535 only penetrates the inside of the base 531 and is communicated with the inside of the support wall 532, thereby ensuring the sealing performance of the first LED wafer 510 and the second LED wafer 520, and ensuring the good packaging effect and light transmission effect of the packaging glue layer 540. In addition, by arranging the heat conduction hole 535, the arc-shaped reflecting layer 534 protruding from the surface of the base 531 can not only facilitate heat dissipation, but also have good reflecting effect. In one embodiment, the material of the metal heat conduction piece 550 is copper or aluminum alloy.

[0066] In one embodiment, the packaging glue layer 540 includes a glue layer body and fluorescent particles mixed in the glue layer body. In the embodiment, the material of the glue layer body is silicone or other glue. During manufacturing, the fluorescent particles are first mixed in the glue, then stirred uniformly, and then the glue mixed with the fluorescent particles is injected into the mounting groove 501. After the glue is solidified, the glue layer body is formed. By mixing the fluorescent particles in the glue layer body, the glue layer body has better reflecting ability and can disperse the light of the LED wafer. In addition, different colors of fluorescent particles can be selected according to the light color requirement, so that the lamp bead 500 emits light of different colors.

[0067] In order to further weaken the obvious degree of the splicing bright-dark seam in the X-axis direction while ensuring the Y-axis light-emitting angle and light-emitting range, in one embodiment, please refer to Figure 2 , Figure 5 and Figure 6A , Figure 6B , the first LED wafer 510 and the second LED wafer 520 of the same lamp bead 500 are arranged along the Y direction, the width of the mounting groove 501 in the X-axis direction is greater than the width in the Y-axis direction, and the bottom of the mounting groove 501 is provided with an arc-shaped reflection layer 534 on both sides of the support wall 532 in the X-axis direction, the cross section of the support wall 532 perpendicular to the X-axis direction is trapezoidal, the width of the support wall 532 gradually decreases from one end close to the base 531 to one end away from the base 531, the first LED wafer 510 gradually inclines toward the outside of the mounting groove 501 from one end away from the base 531 to one end close to the base 531, and the second LED wafer 520 gradually inclines toward the outside of the mounting groove 501 from one end away from the base 531 to one end close to the base 531; the primary light-emitting surface of the primary carrier plate 110 is provided with a halo part 114, the halo part 114 is provided in the form of a hemisphere or an arc, the halo part 114 is arranged in the primary lens 120, the circular arc groove 113 includes a groove bottom 113a and a groove side wall 113b, the groove bottom 113a is arranged in alignment with the halo part 114, the groove side wall 113b is arranged around the groove bottom 113a, the coverage range of the groove side wall 113b is located on the outside of the halo part 114, the width of the groove side wall 113b is greater than the width of the groove bottom 113a, the depth of the circular arc groove 113 gradually increases from the groove side wall 113b to the groove bottom 113a, the depth of the circular arc groove 113 is greater than the thickness of the halo part 114, and less than the thickness of the primary lens 120 on the primary carrier plate 110. In addition, in this embodiment, the surface of the packaging glue layer 540 is provided in the form of an arc surface, and the curvature of the packaging glue layer 540 in the X-axis direction is less than the curvature of the packaging glue layer 540 in the Y-axis direction.

[0068] In this embodiment, the width of the mounting groove 501 in the X-axis direction is greater than the width in the Y-axis direction, and the curvature of the packaging glue layer 540 in the X-axis direction is less than the curvature of the packaging glue layer 540 in the Y-axis direction, so that, as shown in Figure 6C , the projection shape of the packaging glue layer 540 on the substrate is an ellipse, the long axis of the packaging glue layer 540 is parallel to the X-axis direction, and the short axis is parallel to the Y-axis direction, that is, the layout of the elliptical shape of the packaging glue layer 540 is perpendicular to the layout of the elliptical shape of the primary lens 120.

[0069] In the embodiment, the light halo is formed by setting the light halo part 114 on the first carrier plate 110 to form a two-stage lens with the first lens 120, the light halos of adjacent lamp beads are superimposed on the X-axis, so that the wide spliced bright and dark seam becomes a finer light and dark alternating stripe, and the light and dark alternating stripe is scattered by the light transmission microstructure 220 on the second collimating lens 200, so that a uniform light emission effect is formed. Since the light halos are almost not superimposed on the Y-axis, the light emission on the Y-axis does not present a light and dark alternating stripe, and the light emission on the Y-axis is also relatively uniform through the diffusion of the light transmission microstructure 220 on the second collimating lens 200. In the embodiment, the curvature of the packaging adhesive layer 540 in the X-axis direction is smaller than the curvature thereof in the Y-axis direction, that is, the surface of the packaging adhesive layer 540 is more flat in the X-axis direction, the curvature thereof in the Y-axis direction is larger, the bending degree is larger, and the width of the mounting groove 501 in the X-axis direction is larger than the width thereof in the Y-axis direction, so that the reflection and refraction range of the lamp bead in the X-axis direction is increased, the diffusion range is increased, the distance between the two-stage light halos is increased, the distance between the light and dark alternating stripes is increased, and the degree of spliced bright and dark seam is further weakened under the diffusion of the light transmission microstructure 220 on the second collimating lens 200, so that the light emission is more uniform. Since the two LED chips in the same lamp bead are respectively directed to two opposite directions of the Y-axis, the light emission angle in the Y-axis direction is increased, the light is more concentrated in the Y-axis direction due to the larger curvature of the surface of the packaging adhesive layer 540 in the Y-axis direction, the light is prevented from being excessively dispersed, the light emission angle in the Y-axis direction is increased, and the brightness in the Y-axis direction is effectively ensured. Through the above structure, the light emission angle, light emission range and brightness in the Y-axis direction can be ensured, and the degree of spliced bright and dark seam in the X-axis direction can be further weakened, so that the light emission is more uniform and the effect is better.

[0070] In one embodiment, the heat sink 600 includes a heat sink plate 610 and a plurality of heat dissipation fins 620, the heat sink plate 610 is connected to one end of the frame 300 by a screw joint, one side of the heat sink plate 610 is connected to the side of the lamp plate 400 away from the first single-axis symmetric array lens 100 by a heat-conducting double-sided adhesive, and each heat dissipation fin 620 is equidistantly arranged on the side of the heat sink plate 610 away from the lamp plate 400.

[0071] In this embodiment, the heat dissipation plate 610 and the heat dissipation fins 620 are made of aluminum alloy, which has the characteristics of high strength, strong corrosion resistance, and high thermal conductivity, and can efficiently absorb and dissipate the heat of the lamp panel 400 to the outside. In this embodiment, the heat dissipation plate 610 is connected to the back of the lamp panel 400 through the heat-conducting double-sided adhesive, so that the two can be stably connected, and the heat-conducting double-sided adhesive can efficiently conduct the heat of the lamp panel 400 to the heat dissipation plate 610, which efficiently conducts the heat to the heat dissipation fins 620 for dissipation. It is worth mentioning that the heat dissipation plate 610 and the heat dissipation fins 620 are connected in an integrated or welded manner, and the heat dissipation fins 620 effectively increase the contact area with the air, effectively improving the heat dissipation efficiency.

[0072] In order to enable the light passing through the first lens 120 to form collimated light, and further weaken the obvious degree of the spliced bright and dark seams between the lamp beads 500, in an embodiment, the light-transmitting microstructure 220 on the secondary carrier plate 210 is provided as one of the following:

[0073] The light-transmitting microstructure 220 includes a plurality of side-by-side arranged cylindrical bars or semicircular cylindrical bars, wherein the axis of the cylindrical bar or semicircular cylindrical bar is parallel to the X-axis direction;

[0074] The light-transmitting microstructure 220 includes a plurality of side-by-side arranged V-shaped bars or triangular prisms, wherein the length direction of the V-shaped bar or triangular prism is parallel to the X-axis direction;

[0075] The light-transmitting microstructure 220 includes a plurality of pyramid protrusions arranged in an array;

[0076] The light-transmitting microstructure 220 includes a plurality of spherical protrusions, polygonal protrusions or elliptical protrusions arranged in an array;

[0077] The light-transmitting microstructure 220 includes a plurality of asymmetric pyramid protrusions arranged in an array.

[0078] In an embodiment, the light-transmitting microstructure 220 includes a plurality of side-by-side arranged cylindrical bars or semicircular cylindrical bars, for example, the radius of the cylindrical bar or semicircular cylindrical bar is less than or equal to 0.1 mm and greater than 0.05 mm, so that the cylindrical bar or semicircular cylindrical bar can further disperse the light and emit in parallel lines, which can further weaken the obvious degree of the spliced bright and dark seams.

[0079] In an embodiment, the light-transmitting microstructure 220 includes a plurality of side-by-side arranged V-shaped bars or triangular prisms, the maximum width of the V-shaped bar or triangular prism is 0.05 mm to 0.1 mm, and the height is 0.05 mm to 0.15 mm, the V-shaped bar or triangular prism can further diffuse the light in the Y-axis direction, thereby further dispersing the light and emitting in parallel lines, which can further weaken the obvious degree of the spliced bright and dark seams.

[0080] In one embodiment, the light-transmitting microstructure 220 includes a plurality of pyramidal protrusions arranged in an array, in one embodiment, the light-transmitting microstructure 220 includes a plurality of spherical protrusions arranged in an array, in one embodiment, the light-transmitting microstructure 220 includes a plurality of polygonal protrusions arranged in an array, in one embodiment, the light-transmitting microstructure 220 includes a plurality of elliptical protrusions arranged in an array, in one embodiment, the light-transmitting microstructure 220 includes a plurality of asymmetric pyramidal protrusions arranged in an array.

[0081] In this embodiment, the protrusions of different shapes of the light-transmitting microstructure 220 can disperse light to different angles and refract light to be parallel, and the parallel light can further weaken the obviousness of the bright and dark seams.

[0082] In one embodiment, the light-transmitting microstructure of the secondary collimating lens can be implemented by the light-transmitting microstructure disclosed in the prior art Chinese patent CN118778312A.

[0083] In this embodiment, the secondary collimating lens 200 can not only refract light to form collimated light (parallel light), but also disperse and scatter light, further weakening the bright and dark seams, and effectively solving the problem of bright and dark seams between the lamp beads 500, thereby improving the imaging quality.

[0084] In this embodiment, the structure of the lamp bead 500 and the primary single-axis symmetric array lens 100 in the above embodiment can diffuse the light of the lamp bead 500, thereby compensating for the light of the dark seam between the lamp beads 500 and weakening the obviousness of the bright and dark seams between the lamp beads 500. The light-transmitting microstructure 220 on the secondary carrier plate 210 in the above embodiment can further weaken the obviousness of the bright and dark seams between the lamp beads 500.

[0085] In one embodiment, the single-row light-emitting backlight module 10 includes Figure 1 、 Figure 2 and Figure 4The structure in the embodiment, wherein, in the primary uniaxial symmetry array lens 100, the primary lens 120 is elliptical, the long axis direction of the elliptical primary lens 120 is perpendicular to the X axis direction, the short axis direction of the elliptical primary lens 120 is parallel to the X axis direction, and each primary lens 120 is aligned with a lamp bead 500; the primary light-incident surface of the primary carrier plate 110 is recessed to be provided with a plurality of circular-arc grooves 113, each circular-arc groove 113 is aligned with a lamp bead 500, and the primary light-emitting surface of the primary carrier plate 110 is provided with a light halo part 114 in a protruding manner, and the light halo part 114 is arranged in the primary lens 120. The arc-shaped protruding light-incident part 230 is arranged on one side of the primary carrier plate 210 in a protruding manner and faces the primary uniaxial symmetry array lens 100, the axis direction of the arc-shaped protruding light-incident part 230 is parallel to the X axis direction, and the radial plane of the arc-shaped protruding light-incident part 230 is parallel to the Y axis direction. The first LED wafer 510 and the second LED wafer 520 in each LED lamp bead 500 are arranged along the Y direction, and the distance between the first LED wafer 510 and the second LED wafer 520 gradually increases along the direction close to the base 531, the base 531 is provided with a heat-conducting hole 535, and the surface of the base 531 is provided with an arc-shaped reflecting layer 534 in a protruding manner, and the radial cross section of the arc-shaped reflecting layer 534 is parallel to the Y axis direction.

[0086] In the embodiment, the long axis direction of the primary lens 120 is parallel to the Y axis direction, and the short axis direction is parallel to the X axis direction, so that, due to the length of the primary lens 120 in the Y axis direction being greater than the width in the X axis direction, the light of the lamp bead 500 is beneficial to be diffused in the Y axis direction, and the diffusion range is larger, and the width in the X axis direction is smaller, although the diffusion range in the X axis direction is smaller, but due to the large change (steep) of the arc of the primary lens 120 in the X axis direction, the light in the X axis direction can be avoided to be too dispersed, and the light can be condensed between the adjacent lamp beads 500, so as to compensate for the dark seam, and weaken the dark seam, and weaken the obvious degree of the joint bright-dark seam.

[0087] In addition, the circular-arc groove 113 of the primary light-incident surface on the primary carrier plate 110 and the light halo part 114 on the primary light-emitting surface of the primary carrier plate 110 can absorb light in a larger range, and can better diffuse light through the two-lens structure of the light halo part 114 and the primary lens 120, so that the light can compensate for the dark seam and help to weaken the obvious degree of the joint bright-dark seam.

[0088] Further, the arc-shaped protruding light-incident part 230 is arranged on one side of the secondary carrier plate 210 protruding towards the primary single-axis symmetric array lens 100, which is conducive to converging the light scattered and dispersed by the primary lens 120. It is worth mentioning that, since the frame 300 adopts a closed structure, most of the light scattered and dispersed by the primary lens 120 will eventually be directed to the secondary carrier plate 210. The arc surface of the arc-shaped protruding light-incident part 230 not only increases the area of light incident on the secondary carrier plate 210, but also enables the light to diffuse in the Y-axis direction inside the secondary carrier plate 210, thereby increasing the light-emitting range in the Y-axis direction. In addition, since the arc-shaped protruding light-incident part 230 is arc-shaped, the spliced bright-dark seams distributed in the X-axis direction can be stretched and diffused along the Y-axis, thereby weakening the visibility of the spliced bright-dark seams.

[0089] Through the structure of the primary single-axis symmetric array lens 100 and the secondary carrier plate 210, in combination with the first LED wafer 510 and the second LED wafer 520 arranged along the Y direction, the spliced bright-dark seams can be fully eliminated, and good light-emitting effect can be achieved. Figure 7 As shown in the figure, the single-row light-emitting backlight module 10 adopting the structure of the embodiment has significantly weakened spliced bright-dark seams during light emission, and the naked eye cannot see obvious spliced bright-dark seams.

[0090] In one embodiment, a liquid crystal display is provided, which includes the single-row light-emitting backlight module described in any of the above embodiments.

[0091] The light emitted by the LED lamps on the lamp panel is diffused to the primary single-axis symmetric array lens, which receives and distributes the light emitted by the LED lamps, can efficiently utilize the light emitted by the LED lamps, and uniformly transmit the light within the range of the secondary collimating lens. The secondary collimating lens converts the light into collimated light and emits it. The lamp beads and the primary single-axis symmetric array lens are one-to-one corresponding and are arranged in a linear shape. The primary non-rotationally symmetric lens ensures the light-emitting angle, which is about 25° in the X-axis direction and about 15° in the Y-axis direction, so that the brightness uniformity can be ensured when the eyes move left and right and up and down, and the visibility of the spliced bright-dark seams between the lamp beads is greatly weakened, thereby improving the uniformity of backlight illumination. The single-row light-emitting backlight module of the above embodiment has simple structure, low cost, low light energy loss, and ensures the uniformity of light, and has high imaging quality.

[0092] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as within the scope of the present disclosure.

[0093] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A single-row light emitting backlight module, characterized in that, The application relates to a light-emitting device, which comprises a frame, a lamp plate, a primary single-axial symmetrical array lens and a secondary collimating lens. The frame is internally provided with a containing cavity, the lamp plate is arranged at one end of the containing cavity and is fixedly connected with the frame, the lamp plate has a mounting surface, and a row of lamp beads arranged along an X-axis direction are arranged on the mounting surface. The primary single-axial symmetrical array lens comprises a primary carrier plate and a plurality of primary lenses, the primary carrier plate is arranged in the containing cavity and is connected with the lamp plate, the mounting surface faces the primary carrier plate, one side of the primary carrier plate away from the mounting surface is a primary light-out surface, each primary lens is arranged on the primary light-out surface along the X-axis direction, the projection shape of each primary lens on the primary carrier plate is an ellipse, the long axis direction of the ellipse is perpendicular to the X-axis direction, the short axis direction of the ellipse is parallel to the X-axis direction, and each primary lens is aligned with a lamp bead. The secondary collimating lens is arranged on the side of the primary carrier plate away from the lamp plate, the secondary collimating lens comprises a secondary carrier plate and a light-transmitting microstructure, and the light-transmitting microstructure is arranged on one side of the secondary carrier plate away from the primary carrier plate. Two ends of the lamp plate are respectively provided with clamping grooves, and two ends of the primary carrier plate are provided with inserting columns in a direction away from the primary light-out surface, and each inserting column is inserted into a clamping groove.

2. The single-side light emitting backlight module according to claim 1, wherein, One side of the primary carrier plate facing the mounting surface is a primary light-in surface, and a plurality of circular arc grooves are arranged in a recessed mode on the primary light-in surface, and each circular arc groove is aligned with a lamp bead.

3. The single-emissive backlight module of claim 1, wherein, The radian of each circular arc groove is smaller than the radian of the surface of each primary lens.

4. The single-side light emitting backlight module according to claim 3, wherein, The circular arc groove comprises a groove bottom and a groove side wall, the groove side wall is arranged around the groove bottom, the width of the groove side wall is greater than the width of the groove bottom, the depth of the circular arc groove gradually increases from the groove side wall to the groove bottom, and the depth of the circular arc groove is smaller than the thickness of the primary lens on the primary carrier plate.

5. The single-side light emitting backlight module according to claim 3, wherein, Each lamp bead comprises a support, a first LED wafer, a second LED wafer and a packaging adhesive layer, the support comprises a base, a supporting wall and a transparent side wall, the transparent side wall surrounds the outer side of the base and is connected with the base, the transparent side wall and the inner side of the base form a mounting groove, the supporting wall is arranged on the base in a protruding mode and is arranged at the middle part of the base, the first LED wafer is arranged on one side of the supporting wall, the second LED wafer is arranged on the other side of the supporting wall, and the packaging adhesive layer is arranged in the mounting groove in a filling mode and covers the first LED wafer and the second LED wafer.

6. The single-emissive backlight module of claim 1, wherein, The first LED wafer and the second LED wafer are arranged in the following modes:

7. The single-side light emitting backlight module according to claim 6, wherein, The first LED wafer and the second LED wafer of the same lamp bead are arranged along the X-axis direction; or The first LED wafer and the second LED wafer of the same lamp bead are arranged along the Y-axis direction, wherein the Y-axis direction is perpendicular to the X-axis direction. The light-emitting device further comprises a heat sink, the heat sink is connected to one end of the frame through a screwing element, and one side of the heat sink is connected with one side of the lamp plate away from the primary single-axial symmetrical array lens through a heat-conducting double-sided adhesive tape.

8. The single-sided light emitting backlight module according to any one of claims 1-7, wherein, ​ 9. The single-side light emitting backlight module according to claim 8, wherein, The heat sink comprises a heat dissipation plate and a plurality of heat dissipation fins, the heat dissipation plate is connected to one end of the frame by a screwing element, one side of the heat dissipation plate is connected to one side of the lamp plate away from the first single-axis symmetric array lens through a heat-conducting double-sided adhesive tape, and each heat dissipation fin is equidistantly arranged on the side of the heat dissipation plate away from the lamp plate.

10. A liquid crystal display, characterized by comprising: The single-row light-emitting backlight module as claimed in any one of claims 1-9.

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