Backlight structure and display device

Abstract

A backlight structure and a display device. The backlight structure comprises a substrate, a barrier pattern and a plurality of light emitting units. The barrier pattern comprises a plurality of openings arranged in a first direction and a second direction and a barrier wall surrounding each opening, the plurality of openings being configured to define a plurality of lamp regions; the plurality of light emitting units are distributed in the plurality of lamp regions. The substrate comprises a middle region and an edge region surrounding the middle region, at least three light emitting units are arranged in each lamp region in the middle region, the centers of the three light emitting units sequentially connected form a triangle, the distance between the center of the triangle and the center of the lamp region is less than 10% of the pitch of the lamp region, and the included angle between one of the first direction and the second direction and one side of the triangle is less than 5 degrees. The backlight structure provided by the present disclosure is advantageous to improve the light emission uniformity of the lamp region by setting the included angle between the side of the triangle and the first direction and the second direction.

Description

[0001] This application is a divisional application of Chinese Patent Application No. 202211146615.6, filed on September 21, 2022, entitled "Backlight Structure and Display Device". Technical Field

[0002] This disclosure relates to a backlight structure and a display device. Background Technology

[0003] Currently, widely used display devices include thin-film transistor liquid crystal displays (TFT-LCDs), which have the advantages of long lifespan, high brightness, high contrast, and wide color gamut.

[0004] Mini LEDs can be used as backlights for thin-film transistor liquid crystal displays (TFT-LCDs). When Mini LEDs are combined with traditional LCD panels as backlights, by controlling the brightness of the Mini LEDs to match the grayscale displayed on the panel, the LCD device can achieve a contrast ratio comparable to that of organic light-emitting diode (OLED) displays. Summary of the Invention

[0005] This disclosure provides a backlight structure and a display device.

[0006] This disclosure provides a backlight structure including a substrate, a baffle structure on the substrate, and a plurality of light-emitting units. The baffle pattern includes a plurality of openings arranged in an array along a first direction and a second direction, and baffles surrounding each opening. The plurality of openings are configured to define a plurality of lamp zones, the first direction and the second direction intersecting. The plurality of light-emitting units are distributed within the plurality of lamp zones. The substrate includes a central region and an edge region surrounding the central region. At least three light-emitting units are disposed in each lamp zone located in the central region. The centers of the three light-emitting units are sequentially connected to form a triangle. The distance between the center of the triangle and the center of the lamp zone is less than 10% of the pitch of the lamp zone. The angle between one of the first direction and the second direction and one side of the triangle is less than 5 degrees.

[0007] For example, according to an embodiment of this disclosure, the ratio of the different side lengths of the triangle is 0.9 to 1.1, and the ratio of the pitch of the lamp area to the side length of the triangle is 1.7 to 2.3.

[0008] For example, according to an embodiment of this disclosure, the pitch of the lamp area is P, and the distance from the center of the i-th light-emitting unit to the apex corner of the lamp area is L. i The value of i ranges from 1 to 3, and L iP satisfies: 8.5 ≥ P × (1 / L1 + 1 / L2 + 1 / L3) ≥ 6.3.

[0009] For example, according to an embodiment of this disclosure, the luminous intensity distribution I of the light-emitting unit satisfies: I = I0cosmα, where I0 is the luminous intensity distribution perpendicular to the normal direction of the light-emitting surface of the light-emitting unit, α is the angle between the luminous direction of the light-emitting unit and the normal, and m = (-ln2) / (lncosα). 1 / 2 ), α 1 / 2 The angle between the luminous direction and the normal when the luminous intensity drops to half of the luminous intensity corresponding to the normal direction is given; the optical path length of the light emitted by the luminous unit in the normal direction is h; the distance from the center of the i-th luminous unit to the apex angle of the lamp area is L. i The value of i ranges from 1 to 3, and L i It satisfies the following condition with h: 0.5≥{cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+cosm×[(π / 2)-(h / L3)]}≥0.23.

[0010] For example, according to an embodiment of this disclosure, the ratio of the light intensity at the edge of the light area to the light intensity at the center of the light area is not less than 0.5.

[0011] For example, according to an embodiment of this disclosure, the light-emitting units disposed in each light zone are electrically connected, and the barrier includes a light-shielding material.

[0012] For example, according to an embodiment of this disclosure, the light-emitting unit includes a light-emitting diode chip and a packaging structure configured to encapsulate the light-emitting diode chip, with a gap between the packaging structures of adjacent light-emitting units.

[0013] For example, according to an embodiment of this disclosure, the maximum size of the light-emitting unit in the direction parallel to the substrate is no greater than 500 micrometers.

[0014] For example, according to an embodiment of this disclosure, in a direction perpendicular to the substrate, the thickness of the barrier is greater than the height of the light-emitting unit.

[0015] For example, according to an embodiment of this disclosure, the thickness of the barrier is 200 to 400 micrometers, and the height of the light-emitting unit is 50 to 100 micrometers.

[0016] For example, according to an embodiment of this disclosure, the thickness of the barrier is 250-270 micrometers, the width of the barrier is 350-500 micrometers, and the height of the light-emitting unit is 80-100 micrometers.

[0017] For example, according to an embodiment of this disclosure, the backlight structure further includes: a flat adhesive, located between the baffle and the light-emitting unit, and between two adjacent light-emitting units. The thickness of the flat adhesive is not less than the height of the light-emitting unit and less than the thickness of the baffle, and the orthographic projection of the surface of the flat adhesive near the substrate on the substrate is completely within the orthographic projection of the surface of the flat adhesive away from the substrate on the substrate.

[0018] For example, according to an embodiment of this disclosure, the cross-sectional shape of the flat adhesive cut by the plane containing the center line connecting the two adjacent light-emitting units includes a trapezoid, the length of the first base away from the substrate is greater than the length of the second base of the trapezoid close to the substrate, and the distance between the closest endpoints of the orthographic projections of the first base and the second base on the substrate is 17 to 32 micrometers, and the plane is perpendicular to the substrate.

[0019] For example, according to an embodiment of this disclosure, a thermally conductive adhesive is disposed on the side of the substrate away from the light-emitting unit, and at least one opening is disposed in the thermally conductive adhesive.

[0020] For example, according to an embodiment of this disclosure, the backlight structure further includes a light diffusion structure located on the side of the light-emitting unit away from the substrate. The light diffusion structure includes at least one diffusion film with a thickness of 0.05 to 0.2 mm.

[0021] For example, according to an embodiment of this disclosure, the backlight structure further includes a color conversion structure located on the side of the light diffusion structure away from the light-emitting unit. The color conversion structure includes a color conversion film configured to convert a first color light into a second color light, wherein the first color light includes blue light and the second color light includes at least one of red light and green light.

[0022] For example, according to an embodiment of this disclosure, the color conversion structure further includes a prism located on the side of the color conversion film away from the light-emitting unit.

[0023] For example, according to an embodiment of this disclosure, the backlight structure further includes a prism structure located on the side of the color conversion structure away from the light-emitting unit. The prism structure includes at least one prism layer, the thickness of which is 0.05 to 0.2 mm.

[0024] Another embodiment of this disclosure provides a display device, including: a display panel and the aforementioned backlight structure. The display panel is located on the light-emitting side of the backlight structure. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this disclosure and are not intended to limit this disclosure.

[0026] Figure 1 This is a partial planar structural schematic diagram of a backlight structure provided according to an example of an embodiment of the present disclosure.

[0027] Figure 2A and Figure 2B This is a schematic diagram of the light-emitting unit in different examples.

[0028] Figure 3A This is a schematic diagram of the equivalent luminescence of a Lambertian luminescent material.

[0029] Figure 3B This is a schematic diagram of the emission angle and light intensity distribution of a Lambertian light emitter.

[0030] Figure 4 As an example provided in an embodiment of this disclosure Figure 1 A schematic diagram of the local cross-section structure intercepted by line AA'.

[0031] Figure 5 for Figure 1 The diagram shows a light-emitting unit in a light area.

[0032] Figures 6 to 9 This is a schematic diagram showing the distribution of light-emitting units in a lamp area in different examples of embodiments of the present disclosure.

[0033] Figure 10 This is a partial planar structural schematic diagram of a backlight structure provided according to another example of an embodiment of the present disclosure.

[0034] Figure 11 An example of an embodiment of this disclosure is provided along Figure 10 A schematic diagram of the local cross-section structure intercepted by line BB'.

[0035] Figure 12 for Figure 10 The diagram shows a light-emitting unit in a light area.

[0036] Figures 13A to 13G This is a schematic diagram of a light zone provided according to another example of an embodiment of the present disclosure.

[0037] Figure 14 To be Figures 13A to 13G The diagram shows the relationship between the relative light intensity at the edge of the lamp area after rotating the M-sided polygon at different angles.

[0038] Figures 15A to 15G This is a schematic diagram of a light zone provided according to another example of an embodiment of the present disclosure.

[0039] Figure 16 To be Figures 15A to 15G The diagram shows the relationship between the relative light intensity at the edge of the lamp area after rotating the M-sided polygon at different angles.

[0040] Figures 17A to 17G This is a schematic diagram of a light zone provided according to another example of an embodiment of the present disclosure.

[0041] Figure 18 To be Figures 17A to 17G The diagram shows the relationship between the relative light intensity at the edge of the lamp area after rotating the M-sided polygon at different angles.

[0042] Figure 19 This is a schematic diagram showing the distribution of light-emitting units in a lamp area in different examples of embodiments of the present disclosure.

[0043] Figure 20 Another example of an embodiment of this disclosure is provided along Figure 1 A schematic diagram of a partial cross-section intercepted by line AA'.

[0044] Figure 21 Another example of an embodiment of this disclosure is provided along Figure 10 A schematic diagram of a partial cross-section intercepted by line BB'.

[0045] Figure 22 Another example of an embodiment of this disclosure is provided along Figure 10 A schematic diagram of the local cross-section structure intercepted by line BB'.

[0046] Figure 23 For including Figure 11 A partial cross-sectional schematic diagram of the backlight structure of the substrate, barrier, and light-emitting unit shown.

[0047] Figure 24 This is a partial cross-sectional structural schematic diagram of a display device provided according to another embodiment of the present disclosure. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the described embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0049] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects.

[0050] The features such as "parallel," "perpendicular," and "identical" used in the embodiments of this disclosure include features in the strict sense of "parallel," "perpendicular," and "identical," as well as cases where "approximately parallel," "approximately perpendicular," and "approximately identical" include a certain degree of error. Taking into account measurement and errors associated with the measurement of a specific quantity (e.g., limitations of the measurement system), they represent the acceptable deviation range for a specific value as determined by a person skilled in the art. For example, "approximately" can mean within one or more standard deviations, or within 10% or 5% of said value. Unless otherwise specified in the following embodiments of this disclosure, the quantity of a component is implied to mean that the component can be one or more, or can be understood as at least one. "At least one" means one or more, and "more" means at least two.

[0051] This disclosure provides a backlight structure and a display device. The backlight structure includes a substrate, a baffle pattern on the substrate, and a plurality of light-emitting units. The baffle pattern includes a plurality of openings arranged in an array along a first direction and a second direction, and baffles surrounding each opening, the plurality of openings being configured to define a plurality of lamp zones; the plurality of light-emitting units are distributed within the plurality of lamp zones. The substrate includes a central region and an edge region surrounding the central region, and at least three light-emitting units are disposed in each lamp zone located in the central region, the centers of the three light-emitting units being sequentially connected to form a triangle, the distance between the center of the triangle and the center of the lamp zone being less than 10% of the pitch of the lamp zone, and the angle between one of the first direction and the second direction and one side of the triangle being less than 5 degrees.

[0052] The backlight structure provided in this disclosure improves the uniformity of light output in the lamp area by setting the angle between the side of the triangle and the first and second directions.

[0053] The backlight structure and display device provided in the embodiments of this disclosure are described below with reference to the accompanying drawings.

[0054] Figure 1 This is a partial planar structural schematic diagram of a backlight structure provided according to an example embodiment of the present disclosure. For example... Figure 1As shown, the backlight structure includes a substrate 100, a barrier pattern 200 disposed on the substrate 100, and a plurality of light-emitting units 310. The barrier pattern 200 includes a plurality of openings 210 arranged in an array along a first direction and a second direction, and a barrier 220 surrounding each opening 210. The plurality of openings 210 are configured to define a plurality of lamp areas 300, wherein the first direction and the second direction intersect. The plurality of light-emitting units 310 are distributed within the plurality of lamp areas 300. At least three light-emitting units 310 are provided in each of the at least three light-emitting units 300. The centers of the M light-emitting units 310 closest to the apex of the light-emitting unit 300 are connected in sequence to form an M-sided polygon. The distance between the center C1 of the M-sided polygon and the center C2 of the light-emitting unit 300 is less than 10% of the pitch P of the light-emitting unit 300. The ratio of the different side lengths of the M-sided polygon is 0.9 to 1.1, and the ratio of the pitch P of the light-emitting unit 300 to the side length P' of the M-sided polygon is 1.7 to 2.3. At least one side of the M-sided polygon is parallel to at least one of the first direction and the second direction.

[0055] This disclosure improves the uniformity of light output from the lamp area by setting the relationship between the side length of the M-sided polygon and the pitch of the lamp area, setting the relationship between the center of the M-sided polygon and the center of the lamp area, and ensuring that the side of the M-sided polygon is parallel to at least one of the first and second directions.

[0056] For example, one of the first direction and the second direction is Figure 1 The X direction shown, the first direction and the other of the second direction can be... Figure 1 The Y direction shown in this embodiment is illustratively described using the first direction as the X direction and the second direction as the Y direction.

[0057] For example, the first direction and the second direction are perpendicular.

[0058] For example, the angle between the first direction and the second direction can be 80–110 degrees, or 85–100 degrees, or 88–92 degrees. This disclosure is not limited to these embodiments; the first direction and the second direction can be interchanged.

[0059] For example, such as Figure 1 As shown, multiple openings 210 correspond one-to-one with multiple light zones 300, and each opening 210 is used to define a light zone 300.

[0060] For example, the number of light-emitting units 310 distributed in different light zones 300 can be the same or different.

[0061] For example, in the embodiments of this disclosure, it is schematically shown that the number of light-emitting units distributed in different lamp zones is the same, and the arrangement shape of the light-emitting units in each lamp zone is the same, so as to improve the light emission uniformity of the backlight structure.

[0062] For example, such as Figure 1As shown, multiple lamp zones 300 are evenly distributed, and multiple light-emitting units 310 located on the substrate 100 are evenly distributed.

[0063] For example, the number of light-emitting units 310 distributed in a portion of the lamp area 300 in one region of the substrate 100 is the same, while the number of light-emitting units 310 distributed in a portion of the lamp area 300 in another region of the substrate 100 is different. The positions of the aforementioned one region and the other region can be set according to product requirements. For example, the aforementioned one region can be located in the central region of the substrate, and the aforementioned other region can be located in the edge region of the substrate; or the aforementioned one region can be located in the edge region of the substrate, and the aforementioned other region can be located in the central region of the substrate; or the aforementioned one region and the aforementioned other region are both located in different edge regions of the substrate.

[0064] For example, such as Figure 1 As shown, M is not greater than the number of light-emitting units 310 provided in each light zone 300. For example, the shape of M can be triangular, quadrilateral, hexagonal, etc., and this embodiment of the present disclosure does not limit this.

[0065] For example, such as Figure 1 As shown, each of the light zones 300 has at least three light-emitting units 310.

[0066] For example, each light zone 300 can be equipped with three light-emitting units 310, or four light-emitting units 310, or five light-emitting units 310, or six light-emitting units 310, etc.

[0067] For example, such as Figure 1 As shown, the shape of the light area 300 can be polygonal, such as triangle, quadrilateral, or hexagon.

[0068] The center of the aforementioned light-emitting unit refers to the geometric center of the light-emitting unit, such that the orthographic projection of this geometric center onto the substrate coincides with the center of the two-dimensional plane of the orthographic projection of the light-emitting unit onto the substrate. The line connecting the centers of the aforementioned M light-emitting units sequentially can refer to the line connecting the centers of the M light-emitting units clockwise or counterclockwise.

[0069] For example, such as Figure 1 As shown, the pitch P of the lamp area 300 can be the length of the line connecting the centers of adjacent lamp areas 300 arranged in the first direction, or the length of the line connecting the centers of adjacent lamp areas 300 arranged in the second direction. For example, the ratio of the pitch of the lamp area 300 in the first direction to the pitch of the lamp area 300 in the second direction is 0.9 to 1.1, for example, the pitches of the lamp area 300 in these two directions can be equal.

[0070] For example, such as Figure 1As shown, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 9.5% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 9% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 8.5% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 8% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 7.5% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 7% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 6.5% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 6% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 5.5% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 5% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 4.5% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 4% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 3% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 2.5% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 2% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 1.5% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 1% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 0.5% of the pitch P of the lamp area 300.

[0071] For example, such as Figure 1 As shown, the center C1 of the M-sided polygon coincides with the center C2 of the lamp area 300.

[0072] For example, such as Figure 1 As shown, the ratio of different side lengths of the M-gon is 0.98 to 1.08.

[0073] For example, the ratio of different side lengths of an M-gon is 0.96 to 1.04.

[0074] For example, the ratio of the different side lengths of an M-gon is 0.95 to 1.05. For example, the ratio of the different side lengths of an M-gon is 0.92 to 1.02.

[0075] For example, such as Figure 1 As shown, all sides of the M-gon are of equal length, P'.

[0076] For example, such as Figure 1 As shown, the ratio of the pitch P of the lamp area 300 to the side length P' of the M-gon is 1.7 to 2.3. For example, the ratio of the pitch P of the lamp area 300 to the side length P' of the M-gon is 1.65 to 2.25. For example, the ratio of the pitch P of the lamp area 300 to the side length P' of the M-gon is 1.7 to 2.2. For example, the ratio of the pitch P of the lamp area 300 to the side length P' of the M-gon is 1.75 to 2.15. For example, the ratio of the pitch P of the lamp area 300 to the side length P' of the M-gon is 1.8 to 2.1. For example, the ratio of the pitch P of the lamp area 300 to the side length P' of the M-gon is 1.85 to 2.05. For example, the ratio of the pitch P of the lamp area 300 to the side length P' of the M-gon is 1.9 to 2.

[0077] For example, such as Figure 1 As shown, the pitch P of the lamp area 300 is twice the side length P' of the M-gon.

[0078] For example, such as Figure 1 As shown, at least one side of the M-gon is parallel to at least one of the first and second directions.

[0079] For example, the M-gon may include only sides parallel to the first direction, or the M-gon may include only sides parallel to the second direction, or the M-gon may include sides parallel to the first direction and sides parallel to the second direction.

[0080] Figure 2A and Figure 2B These are schematic diagrams of the light-emitting units in different examples. Figure 3A This is a schematic diagram of the equivalent luminescence of a Lambertian luminescent material. Figure 3B This is a schematic diagram of the emission angle and light intensity distribution of a Lambertian light emitter.

[0081] For example, such as Figures 3A to 3B As shown, if the luminous intensity of an extended light source is dI∝cosmα, meaning its brightness is independent of direction, this type of emitter is called a cosine emitter or a Lambert emitter. The law governing luminous flux emission according to cosα is called Lambert's cosine law. In the formula, dI is the luminous intensity of each surface element dS of the extended light surface along a certain direction r, and α is the angle between the light emission direction r and the normal n.

[0082] The light intensity distribution satisfies: I α =I O cosmα,I O The luminous intensity distribution is perpendicular to the normal direction of the light source surface, m=(-In2) / (Incosα) 1 / 2 ), that is, m is determined by α 1 / 2 Decision, where α 1 / 2 α is defined as the angle between the luminous direction and the normal n when the luminous intensity drops to half of the luminous intensity corresponding to the normal direction. 1 / 2 The value of α ranges from 40° to 80°, such as α. 1 / 2 The value of α can range from 48° to 75°, such as α. 1 / 2 The value of α can range from 46° to 78°, such as α. 1 / 2 The value of α can range from 45° to 76°. That is, if the intensity of the light ray emitted along the normal n direction is defined as 1, and the angle between the ray and the normal n is α... 1 / 2 The intensity of the emitted ray is 1 / 2, and the angle between the emitted direction and the normal n is greater than α. 1 / 2 The light rays emitted by a Lambert luminescent body have relatively low intensity. That is, although a Lambert luminescent body can theoretically emit countless light rays, the light rays with different angles to the normal n have different intensities.

[0083] In some examples, such as Figure 2A As shown, the light-emitting unit 310 includes a light-emitting diode chip 323 and a packaging structure 324 configured to encapsulate the light-emitting diode chip 323, with a gap between the packaging structures 324 of adjacent light-emitting units 310.

[0084] For example, such as Figure 2A As shown, the light-emitting unit 310 includes a packaged light-emitting diode chip, wherein the light-emitting diode chip 323 can be a sub-millimeter light-emitting diode chip (miniLED), and the size of the unpackaged light-emitting diode chip 323 in the direction perpendicular to the substrate 100 can be 70 micrometers to 180 micrometers, and the maximum size of the unpackaged light-emitting diode chip 323 in the direction parallel to the substrate 100 is no more than 500 micrometers.

[0085] For example, the packaged light-emitting diode chip is the light-emitting unit 310. The maximum size and thickness of the packaged light-emitting diode chip 323 in the direction parallel to the substrate 100 are larger than the corresponding parameters of the unpackaged light-emitting diode chip 323.

[0086] For example, such as Figure 2A As shown, a single light-emitting diode chip 323 can be packaged into an independent device to form a light-emitting unit 310, and then placed in the corresponding position on the backlight structure and fixedly connected to the pads on the substrate 100.

[0087] Since an unpackaged LED chip can be considered a Lambertian light emitter, when the LED chip is packaged, the light emission angle range is +α. 1 / 2 to -α 1 / 2 The light rays inside can be emitted, while +α 1 / 2 to -α 1 / 2 The light rays emitted from the light-emitting unit 310 are essentially confined within the independent device due to total internal reflection. In this case, the angle θ between the outermost ray emitted by the light-emitting unit 310 and the substrate 100 can be α. 1 / 2 The complementary angle.

[0088] For example, such as Figure 2A As shown, the light-emitting unit 310 or the light-emitting diode chip 323 is connected to the pad 321 on the substrate 100 via solder metal 322.

[0089] For example, welding metal 322 may include solder.

[0090] For example, such as Figure 2A As shown, the encapsulation structure 324 can be doped with color conversion material 325.

[0091] For example, color conversion material 325 may include phosphor material or quantum dot material.

[0092] For example, color conversion material 325 may include a material that converts blue light into white light.

[0093] For example, color conversion material 325 may include materials that convert blue light into red and green light. Of course, the embodiments disclosed herein are not limited to this, and color conversion materials may be doped into the packaging structure.

[0094] For example, such as Figure 2A As shown, the LED chip 323 can also be placed on the corresponding position on the substrate 100 before encapsulation.

[0095] For example, each LED chip can be encapsulated using a transparent material, such as transparent silicone, through screen printing or dot printing to form an encapsulation structure 324. Depending on the shape of the encapsulation structure 324, the light emission angle of the LED chip 323 can be modulated, thereby changing the light emission angle of the light-emitting unit 310.

[0096] For example, such as Figure 2A As shown, the surface of the packaging structure 324 away from the substrate 100 can be curved, and the emission angle of the outermost light ray emitted by the light-emitting unit 310 is slightly larger than the α angle of the light-emitting diode chip 323. 1 / 2 If α 1 / 2If the value range is 40° to 65°, then the range of the light emission angle of the outermost light ray emitted by the light-emitting unit 310 can be 50° to 70°.

[0097] For example, the package structure 324 can have any desired size in the direction perpendicular to the substrate 100. For example, the size of the package structure 324 in the direction perpendicular to the substrate 100 can be less than 0.5 mm. For example, the size of the package structure 324 in the direction perpendicular to the substrate 100 can be between 0.1 and 0.4 mm. For example, the size of the package structure 324 in the direction perpendicular to the substrate 100 can be between 0.2 and 0.4 mm. For example, the size of the package structure 324 in the direction perpendicular to the substrate 100 can be less than 0.3 mm. For example, the size of the package structure 324 in the direction perpendicular to the substrate 100 can be between 0.25 and 0.35 mm. For example, the size of the package structure 324 in the direction perpendicular to the substrate 100 can be between 0.15 and 0.25 mm. For example, the size of the package structure 324 in the direction perpendicular to the substrate 100 can be approximately 0.2 mm. For example, the size of the package structure 324 in the direction perpendicular to the substrate 100 can be approximately 0.3 mm.

[0098] For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 can be between 0.3 and 2.5 mm. For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 can be between 0.3 and 2.5 mm. For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 can be between 0.3 and 0.7 mm. For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 can be between 0.8 and 0.9 mm. For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 can be greater than 0.5 mm. For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 can be greater than 1.0 mm. For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 can be greater than 2.0 mm. For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 can be less than 2.0 mm, etc.

[0099] For example, the ratio of the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 to its dimension in the direction perpendicular to the substrate 100 can be greater than 3. For example, the ratio of the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 to its dimension in the direction perpendicular to the substrate 100 can be between 4 and 6. For example, the ratio of the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 to its dimension in the direction perpendicular to the substrate 100 can be less than 10.

[0100] For example, after being packaged as an independent device, the geometric center of the LED chip projected onto the substrate can coincide with the geometric center of the independent device projected onto the substrate. However, it is not limited to this. The geometric center of the LED chip projected onto the substrate can also be offset relative to the geometric center of the independent device projected onto the substrate. The height of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is the height of the packaged LED chip.

[0101] For example, such as Figure 2A As shown, the size of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is no greater than 200 micrometers. For example, the size of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is no greater than 180 micrometers. For example, the size of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is no greater than 160 micrometers. For example, the size of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is no greater than 150 micrometers. For example, the size of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is no greater than 140 micrometers. For example, the size of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is no greater than 130 micrometers. For example, the size of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is no greater than 120 micrometers. For example, the size of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is no greater than 110 micrometers. For example, the size of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is no greater than 100 micrometers. The size of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is the height of the light-emitting unit 310.

[0102] In some examples, such as Figure 2A As shown, the height of the light-emitting unit 310 is 50–100 micrometers.

[0103] In some examples, such as Figure 2A As shown, the height of the light-emitting unit 310 is 80–100 micrometers.

[0104] For example, the height of the light-emitting unit 310 is 55–95 micrometers. For example, the height of the light-emitting unit 310 is 60–90 micrometers. For example, the height of the light-emitting unit 310 is 70–85 micrometers. For example, the height of the light-emitting unit 310 is 75–80 micrometers.

[0105] In some examples, such as Figures 1 to 2AAs shown, the maximum size of the light-emitting unit 310 in the direction parallel to the substrate 100 is no greater than 500 micrometers. For example, the maximum size of the light-emitting unit 310 in the direction parallel to the substrate 100 is no greater than 450 micrometers. For example, the maximum size of the light-emitting unit 310 in the direction parallel to the substrate 100 is no greater than 400 micrometers. For example, the maximum size of the light-emitting unit 310 in the direction parallel to the substrate 100 is no greater than 350 micrometers. For example, the maximum size of the light-emitting unit 310 in the direction parallel to the substrate 100 is no greater than 330 micrometers. For example, the maximum size of the light-emitting unit 310 in the direction parallel to the substrate 100 is no greater than 300 micrometers. For example, the maximum size of the light-emitting unit 310 in the direction parallel to the substrate 100 is no greater than 280 micrometers.

[0106] For example, such as Figure 1 As shown, the size of the light-emitting unit 310 in at least one of the first and second directions is no greater than 250 micrometers. For example, the size of the light-emitting unit 310 in at least one of the first and second directions is no greater than 240 micrometers. For example, the size of the light-emitting unit 310 in at least one of the first and second directions is no greater than 230 micrometers. For example, the size of the light-emitting unit 310 in at least one of the first and second directions is no greater than 220 micrometers. For example, the size of the light-emitting unit 310 in both the first and second directions is 219 micrometers.

[0107] The shape of the light-emitting unit can refer to the shape of the orthographic projection of the light-emitting unit onto the substrate.

[0108] For example, the shape of the light-emitting unit can be quadrilateral, such as a rectangle, and the maximum dimension of the light-emitting unit in the direction parallel to the substrate can be the length of the diagonal of the quadrilateral.

[0109] For example, if the shape of the light-emitting unit is elliptical, then the maximum dimension of the light-emitting unit in the direction parallel to the substrate can be the length of the major axis of the ellipse.

[0110] For example, if the shape of the light-emitting unit is circular, then the maximum dimension of the light-emitting unit in the direction parallel to the substrate can be the diameter.

[0111] For example, such as Figure 2B As shown, the light-emitting unit 310 may also include only an unpackaged light-emitting diode chip 323, and the maximum size of the unpackaged light-emitting diode chip 323 in the direction parallel to the substrate 100 is no more than 500 micrometers.

[0112] For example, the light-emitting unit 310 is an unpackaged light-emitting diode chip 323, wherein the light-emitting diode chip 323 is a sub-millimeter inorganic light-emitting diode (miniLED), the thickness of the unpackaged light-emitting diode chip 323 can be 70 micrometers to 180 micrometers, and the maximum dimension of the unpackaged light-emitting diode chip 323 in the direction parallel to the substrate 100 is no more than 500 micrometers.

[0113] For example, an unpackaged LED chip 323 can be equivalent to a Lambertian light emitter, because the angle between the unpackaged LED chip 323 and the normal n is greater than α. 1 / 2 The light rays, whose intensity is relatively low, are not within the scope of this disclosure. Therefore, in this embodiment, the angle between the unpackaged LED chip 323 and the normal n is α. 1 / 2 The emitted light is defined as the outermost edge light of the unencapsulated light-emitting diode chip 323, which is also the outermost edge light of the light-emitting unit 310.

[0114] For example, such as Figure 2B As shown, a protective layer 326 is provided on the side of the plurality of light-emitting units 310 away from the substrate 100.

[0115] For example, in order to prevent the light-emitting diode chip 323 from being scratched or bumped during subsequent processes, such as placing an optical film on the substrate 100 or during transportation, a protective layer 326 can be used to uniformly protect multiple light-emitting diode chips 323.

[0116] For example, multiple LED chips 323 can share the same protective layer 326. For example, the protective layer 326 can be made of a transparent material, such as transparent silicone. For example, the protective layer 326 can fill the lamp area.

[0117] For example, the surface of the protective layer 326 away from the substrate 100 can be an almost flat surface, thereby improving the yield of the display device.

[0118] For example, in order to reduce total internal reflection of light emitted by the LED chip 323 within the protective layer 326, the refractive index of the protective layer 326 can be between the refractive index of the LED chip 323 and the refractive index of the material adjacent to the protective layer 326 (e.g., air).

[0119] For example, the refractive index of the protective layer 326 can be between 1.2 and 1.6. For example, the refractive index of the protective layer 326 can be between 1.3 and 1.4. For example, the refractive index of the protective layer 326 is less than 1.4. For example, the refractive index of the protective layer 326 can be less than 1.5. For example, the refractive index of the protective layer 326 can be greater than 1.1. For example, the refractive index of the protective layer 326 can be greater than 1.2. For example, the refractive index of the protective layer 326 can be greater than 1.3. For example, the refractive index of the protective layer 326 can be approximately 1.35. For example, the protective layer 326 can cover all unencapsulated LED chips 323 on the substrate 100, and the protective layer 326 can have a flat or slightly uneven upper surface. For example, the thickness of the protective layer 326 is slightly greater than the thickness of the unencapsulated LED chips 323.

[0120] Figure 4 As an example provided in an embodiment of this disclosure Figure 1 A schematic diagram of the local cross-section structure intercepted by line AA'.

[0121] In some examples, such as Figure 4 As shown, in the direction perpendicular to the substrate 100, the thickness of the barrier 220 is greater than the height of the light-emitting unit 310.

[0122] In some examples, such as Figure 4 As shown, the thickness of the retaining wall 220 is 200-400 micrometers, and the height of the light-emitting unit 310 is 50-100 micrometers.

[0123] The thickness of the aforementioned barrier 220 refers to the dimension of the barrier 220 in the direction perpendicular to the substrate 100.

[0124] In some examples, such as Figure 4 As shown, the thickness of retaining wall 220 is 250–270 micrometers.

[0125] For example, the thickness of the retaining wall 220 can be 210–390 micrometers. For example, the thickness of the retaining wall 220 can be 220–370 micrometers. For example, the thickness of the retaining wall 220 can be 230–350 micrometers. For example, the thickness of the retaining wall 220 can be 235–320 micrometers. For example, the thickness of the retaining wall 220 can be 240–300 micrometers. For example, the thickness of the retaining wall 220 can be 245–280 micrometers.

[0126] In some examples, such as Figure 4 As shown, the width of the barrier 220 is 350–500 micrometers. The width of the barrier 220 refers to the dimension of the barrier 220 between two adjacent lamp areas 300 in the first direction, or the dimension of the barrier 220 between two adjacent lamp areas 300 in the second direction.

[0127] For example, such as Figure 4 As shown, the width of the retaining wall 220 can be 370–480 micrometers. For example, the width of the retaining wall 220 can be 350–450 micrometers. For example, the width of the retaining wall 220 can be 360–440 micrometers. For example, the width of the retaining wall 220 can be 370–430 micrometers. For example, the width of the retaining wall 220 can be 380–420 micrometers. For example, the width of the retaining wall 220 can be 390–410 micrometers. For example, the width of the retaining wall 220 can be 400 micrometers.

[0128] In some examples, such as Figure 1 and Figure 4 As shown, the retaining wall 220 includes a light-blocking material.

[0129] For example, the material of retaining wall 220 may include black resin.

[0130] In some examples, such as Figure 1 As shown, the light-emitting units 310 in each light zone 300 are electrically connected. For example, multiple light-emitting units 310 in each light zone 300 are connected in series. For example, multiple light-emitting units 310 in each light zone 300 are connected in parallel.

[0131] In the backlight structure disclosed herein, by surrounding each light zone with a light-shielding barrier, the probability of crosstalk between different light zones is reduced, thus improving the halo effect.

[0132] In some examples, such as Figure 1 As shown, at least a portion of the light area 300 has a rectangular shape, in which two adjacent sides extend along a first direction and a second direction, respectively.

[0133] For example, all light zones 300 are rectangular in shape.

[0134] For example, different light zones 300 may have the same shape and size. Of course, the embodiments disclosed herein are not limited to this. Depending on product requirements, the substrate may be divided into multiple regions, and the size of the light zones in different regions may be different, while the size of the light zones in the same region may be the same.

[0135] Figure 5 for Figure 1 The diagram shows a light-emitting unit in a light area. Figure 5 The illustration shows a light area comprising four light-emitting units, with the M-shaped element being a quadrilateral.

[0136] For example, such as Figure 5 As shown, the shape of a lamp area 300 can be square, and the M-sided polygon formed by the center line connecting the four light-emitting units 310 in the lamp area 300 is a square.

[0137] For example, with Iα =I O cosmα is Equation 1, with m = (-In2) / (Incosα) 1 / 2 (e.g., Formula 2, α) 1 / 2 The range can be 45° to 75°. For example, at 60°, we can obtain m. min =0.5, m max =2. For example, the vertical component of the optical path length emitted by a light-emitting unit, such as in Figure 3A The optical path length h in the direction of the normal n shown can be 100–350 micrometers. For example, h can be 120–330 micrometers. For example, h can be 150–300 micrometers. For example, h can be 170–280 micrometers. For example, h can be 200–250 micrometers. The above h is equal to the height difference between the height of the barrier and the height of the light-emitting unit, such as h being the vertical height difference from the surface of the light-emitting unit away from the substrate to the highest point of the barrier.

[0138] For example, such as Figure 5 As shown, taking the length of the pitch P of the lamp area 300 as P, and the distance between the center of the light-emitting unit 314 and the center of the light-emitting unit 313 as P / 2, then L2, L4 and P satisfy L2=L4=[(3×P / 4)] 2 +(P / 4) 2 ] 1 / 2 =(10) 1 / 2 ×P / 4; L1 and P satisfy: L1=(2) 1 / 2 ×P / 4; L3 and P satisfy: L3=3×(2) 1 / 2 ×P / 4. The above L1, L2, L3, and L4 refer to the horizontal distance from the center of the corresponding light-emitting unit 310 to the top corner of the lamp area.

[0139] For example, such as Figure 3A and Figure 5 As shown, θ is the complementary angle of α, i.e., θ = 90° - α, tanθ = h / L, then cosmα = sinm[(π / 2) - α]. For example, the light-emitting unit 310, such as the α of the packaged light-emitting diode chip... 1 / 2 If the angle is 60°, then m≈1.

[0140] For example, since h is on the order of micrometers and L is on the order of millimeters, L >> h, so θ is very small. In this case, tanθ ≈ θ = h / L, α is close to 90 degrees, and cosα = sinθ ≈ tanθ = h / L. Since m ≈ 1, cosmα = sin(90° - mα) ≈ sin[m × (90° - α)] ≈ sin(m × θ) ≈ m × sinθ ≈ m × h / L. Therefore, Figure 5 The light intensity at position E1 is shown as I1=I0cos(mα1)+I0cos(mα2)+…+I0cos(mα) N)≈I0×m×h / L1+I0×m×h / L2+…+I0×m×h / L N =I0×m×h×(1 / L1+1 / L2+…+1 / L N N is the number of light-emitting units in the lamp area. Figure 5 The N shown can be 4.

[0141] The above relationship 1: I1=I0×m×h×(1 / L1+1 / L2+…+1 / L N ) can also be expressed as Equation 1 above represents the summation relationship of the corresponding values ​​of N light-emitting units in the lamp area.

[0142] Substituting L2, L4, L1, and L3 into the above formula, we get I1≈I0×m×h / [2×(10)] 1 / 2 ×P / 4+(2) 1 / 2 ×P / 4+3×(2) 1 / 2 [×P / 4]=6.3×I0×m×h / P.

[0143] For example, Figure 5 The light intensity at position E2 is approximately I2≈4×I0×m×h / [(2)] 1 / 2 [×P / 4]=11.3×I0×m×h / P.

[0144] For example, I1 / I2 = 0.56.

[0145] In some examples, such as Figure 5 As shown, the ratio of the light intensity at the edge of the light area 300, such as area E1, to the light intensity at the center of the light area 300, such as area E2, is not less than 0.5.

[0146] For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.55. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.6. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.65. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.7. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.75. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.8. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.85. For example, the ratio of the light intensity at the edge of the light area 300 to the light intensity at the center of the light area 300 is not less than 0.9.

[0147] In some examples, such as Figure 5 As shown, I0, m, and h in Equation 1 above can be considered as constants. At least some of the lamp areas 300 include N light-emitting units, N≥M, and the distance from the center of the i-th light-emitting unit 310 to the apex of the lamp area 300 is L. i The value of i ranges from 1 to N, and L i P and N satisfy: 8.5 ≥ P × (1 / L1 + 1 / L2 + ... + 1 / L N )≥6.3. Where P×(1 / L1+1 / L2+…+1 / L N This can be used as an approximate reference value for the unitless relative light intensity at the edge location. The above 1 / L1 + 1 / L2 + ... + 1 / L N L represents N light-emitting units N The sum of the reciprocals.

[0148] For example, 8.3 ≥ P × (1 / L1 + 1 / L2 + ... + 1 / L) N )≥6.5. For example, 8.1≥P×(1 / L1+1 / L2+…+1 / L N )≥6.6. For example, 8.2≥P×(1 / L1+1 / L2+…+1 / L N )≥6.7. For example, 8≥P×(1 / L1+1 / L2+…+1 / L N )≥6. For example, 7.9≥P×(1 / L1+1 / L2+…+1 / L N )≥6.9. For example, 7.8≥P×(1 / L1+1 / L2+…+1 / L N )≥7. For example, 7.7≥P×(1 / L1+1 / L2+…+1 / L N )≥6.8. For example, 7.5≥P×(1 / L1+1 / L2+…+1 / L N )≥7.1. For example, 7.6≥P×(1 / L1+1 / L2+…+1 / L N )≥7.2. For example, 7.4≥P×(1 / L1+1 / L2+…+1 / L N )≥7.3.

[0149] The top corner of the aforementioned light area can refer to Figure 5 The E1 region is shown.

[0150] The above relationship 8.5 ≥ P × (1 / L1 + 1 / L2 + ... + 1 / L) N ≥6.3 can also be expressed as in The above formula represents the summation relationship of the corresponding values ​​of N light-emitting units in the lamp area.

[0151] For example, such as Figure 5 As shown, the light area 300 includes 4 light-emitting units, and the distance from the center of the i-th light-emitting unit 310 to the apex corner of the light area 300 is L. i The value of i ranges from 1 to 4, and L i P and N satisfy: 8.5 ≥ P × (1 / L1 + 1 / L2 + 1 / L3 + 1 / L4) ≥ 6.3. For example, P × (1 / L1 + 1 / L2 + 1 / L3 + 1 / L4) = 6.3.

[0152] For example, such as Figure 1 As shown, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.7 to 2.3. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.65 to 2.25. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.7 to 2.2. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.75 to 2.15. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.8 to 2.1. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.85 to 2.05. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.9 to 2.

[0153] In some examples, such as Figure 1 and Figure 5 As shown, each of the at least some light areas 300 includes at least four light-emitting units 310, which are arranged in an M-sided shape, with one of the first and second directions forming an angle of 0 degrees with at least one side of the M-sided shape.

[0154] For example, such as Figure 1 As shown, at least part of the light area 300 is square in shape.

[0155] In some examples, such as Figure 1 As shown, each of the at least partial light areas 300 is shaped as a first square, and each of the at least partial light areas 300 includes at least four light-emitting units 310. The centers of the four light-emitting units 310 closest to the four vertices of the light area 300 are connected sequentially to form a second square, and the angle between the diagonal of the first square and the diagonal of the second square is 0 degrees.

[0156] For example, the diagonal of the first square can coincide with the diagonal of the second square.

[0157] In some examples, such as Figure 1 As shown, at least four light-emitting units 310 include four light-emitting units 311, 312, 313 and 314, and the centers of the four light-emitting units 311, 312, 313 and 314 are connected sequentially to form a second square.

[0158] For example, the angle between two sides of the second square and the first direction is 0 degrees, and the angle between the other two sides of the second square and the second direction is 0 degrees.

[0159] For example, such as Figure 1 As shown, multiple light-emitting units 310 are evenly distributed in the light area 300.

[0160] For example, such as Figure 1 and 5 As shown, the pitch of the lamp area 300 is 4.46 mm, the pitch of the light-emitting unit 310 is 2.23 mm, and the size of the light-emitting unit 310 can be 0.22 mm × 0.22 mm. For example, the number of lamp areas 300 can be 2596, such as 44 lamp areas 300 arranged along one of the first and second directions, and 59 lamp areas 300 arranged along the other of the first and second directions. For example, the size of the lamp area 300 on the substrate can be 263 mm × 196 mm.

[0161] For example, the total thickness of the lamp panel formed by the substrate 100, the light-emitting unit 310, and the barrier pattern 200 can be 0.27 mm.

[0162] In some examples, such as Figure 1 , Figure 3A and Figure 5 As shown, the luminous intensity distribution I of the light-emitting unit 310 satisfies: I = I0cosmα, where I0 is the luminous intensity distribution in the direction perpendicular to the normal to the light-emitting surface of the light-emitting unit 310, α is the angle between the luminous direction of the light-emitting unit 310 and the normal, and m = (-ln2) / (lncosα). 1 / 2 ), α 1 / 2 The angle between the luminous direction and the normal when the luminous intensity drops to half of the luminous intensity corresponding to the normal direction is given by the luminous unit 310. The optical path length of the light emitted in the normal direction is h. Each lamp area 300 of at least some lamp areas 300 includes N luminous units 310, where N ≥ M, and the distance from the center of the i-th luminous unit 310 to the apex angle of the lamp area 300 is L. i The value of i ranges from 1 to N, and L i h and N satisfy: 0.5≥cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L2)] N )]≥0.23.

[0163] For example, such as Figure 3A and Figure 5As shown, when the emitted light angle θ of the light-emitting unit 310 is very small, tanθ≈θ=h / L. Substituting tanθ≈θ=h / L and α=(π / 2)-θ into the formula cosmα, we get cosmα=cosm×[(π / 2)-θ]≈cosm×[(π / 2)-(h / L)]. Therefore, Figure 5 The light intensity at position E1 is shown as I1 = I0 × cosm × [(π / 2) - (h / L1)] + I0 × cosm × [(π / 2) - (h / L2)] + ... + I0 × cosm × [(π / 2) - (h / L1)] N N is the number of light-emitting units in the lamp area. Figure 5 The N shown can be 4, then I1=I0×cosm×[(π / 2)-(h / L1)]+I0×cosm×[(π / 2)-(h / L2)]+I0×cosm×[(π / 2)-(h / L3)]+I0×cosm×[(π / 2)-(h / L N )).

[0164] The above relation 2: I1=I0×cosm×[(π / 2)-(h / L1)]+I0×cosm×[(π / 2)-(h / L2)]+…+I0×cosm×[(π / 2)-(h / L2)] N )] can also be represented as in, Where m is approximately equal to 1. The above equation 2 represents the summation relationship of the corresponding values ​​of the N light-emitting units in the lamp area.

[0165] For example, taking a pitch of 4.46 mm for the lamp area 300 and a pitch of 2.23 mm for the light-emitting unit 310, then S = 0.254002. The pitch of the light-emitting unit 310 mentioned above can refer to the side length of the M-sided polygon.

[0166] For example, 0.48≥cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )]≥0.25.

[0167] For example, 0.45≥cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )]≥0.27.

[0168] For example, 0.42≥cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )]≥0.28.

[0169] For example, 0.4≥cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )]≥0.3.

[0170] For example, 0.38≥cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )]≥0.32.

[0171] For example, 0.36≥cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )]≥0.35.

[0172] Figures 6 to 9 This is a schematic diagram showing the distribution of light-emitting units in a lamp area in different examples of embodiments of the present disclosure.

[0173] For example, Figure 6 In the example shown, at least one light area 300 includes five light-emitting units 311, 312, 313, 314 and 315. The centers of four light-emitting units 311, 312, 313 and 314 are connected sequentially to form a quadrilateral, or the five light-emitting units 311, 312, 313, 314 and 315 are arranged in a quadrilateral. The angle between at least one of the first direction and the second direction and at least one side of the quadrilateral is 0 degrees.

[0174] The four light-emitting units 311, 312, 313 and 314 mentioned above can be the four outermost light-emitting units or the four light-emitting units closest to the top corner of the lamp area.

[0175] For example, such as Figure 6 As shown, the light area 300 includes 5 light-emitting units, and the distance from the center of the i-th light-emitting unit 310 to the apex corner of the light area 300 is L. i The value of i ranges from 1 to 5, and L i P and N satisfy: 8.5≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5)≥6.3.

[0176] For example, 8.3≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5)≥6.5.

[0177] For example, 8.1≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5)≥6.6.

[0178] For example, 8.2≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5)≥6.7.

[0179] For example, 8≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5)≥6.

[0180] For example, 7.9 ≥ P × (1 / L1 + 1 / L2 + 1 / L3 + 1 / L4 + 1 / L5) ≥ 6.9.

[0181] For example, 7.8≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5)≥7.

[0182] For example, 7.7≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5)≥6.8.

[0183] For example, 7.5≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5)≥7.1.

[0184] For example, 7.6≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5)≥7.2.

[0185] For example, 7.4≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5)≥7.3.

[0186] For example, such as Figure 6 As shown, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.7 to 2.3. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.65 to 2.25. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.7 to 2.2. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.75 to 2.15. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.8 to 2.1. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.85 to 2.05. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.9 to 2.

[0187] For example, such as Figure 6 As shown, the five light-emitting units 311, 312, 313, 314, and 315 can be evenly distributed. For example, light-emitting unit 315 can be located at the center of the quadrilateral formed by the four light-emitting units 311, 312, 313, and 314.

[0188] For example, such as Figure 6 As shown, the quadrilateral formed by connecting the centers of the four light-emitting units 311, 312, 313 and 314 in sequence can be a rectangle.

[0189] For example, the quadrilateral formed by connecting the centers of the four light-emitting units 311, 312, 313 and 314 in sequence can be a square.

[0190] For example, the angle between two sides of a quadrilateral and the first direction is 0 degrees, and the angle between the other two sides of the quadrilateral and the second direction is 0 degrees.

[0191] For example, such as Figure 6 As shown, the shape of the light area 300 is a first square, and the quadrilateral formed by connecting the centers of the four light-emitting units 311, 312, 313 and 314 in sequence can be a second square. The angle between the diagonals of the first square and the second square is 0 degrees. For example, the diagonal of the first square can coincide with the diagonal of the second square.

[0192] For example, such as Figure 6 As shown, the pitch of the lamp area 300 is 4.46 mm, the pitch of the light-emitting unit 310 is 2.23 mm, and the size of the light-emitting unit 310 can be 0.22 mm × 0.22 mm. For example, the number of lamp areas 300 can be 2596, such as 44 lamp areas 300 arranged along one of the first and second directions, and 59 lamp areas 300 arranged along the other of the first and second directions. For example, the size of the lamp area 300 on the substrate can be 263 mm × 196 mm.

[0193] For example, Figure 6 The dimensions, materials, and light-emitting unit dimensions of the retaining wall in the example shown can be the same as the corresponding parameters in the above examples, and will not be repeated here.

[0194] For example, Figure 7 In the example shown, at least one light area 300 includes nine light-emitting units 311, 312, 313, 314, 315, 316, 317, 318, and 319. The centers of four light-emitting units 311, 312, 313, and 314 are connected sequentially to form a quadrilateral, or the nine light-emitting units 311, 312, 313, 314, 315, 316, 317, 318, and 319 are arranged in a quadrilateral. The angle between at least one of the first direction and the second direction and at least one side of the quadrilateral is 0 degrees. The four light-emitting units 311, 312, 313, and 314 can be the four outermost light-emitting units or the four light-emitting units closest to the apex of the light area.

[0195] For example, such as Figure 7 As shown, the light area 300 includes 9 light-emitting units, and the distance from the center of the i-th light-emitting unit 310 to the apex corner of the light area 300 is L. i The value of i ranges from 1 to 9, and L iP and N satisfy: 8.5≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≥6.3.

[0196] For example, 8.3≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≥6.5.

[0197] For example, 8.1≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≥6.6.

[0198] For example, 8.2≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≥6.7.

[0199] For example, 8≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≥6.

[0200] For example, 7.9 ≥ P × (1 / L1 + 1 / L2 + 1 / L3 + 1 / L4 + 1 / L5 + 1 / L6 + 1 / L7 + 1 / L8 + 1 / L9) ≥ 6.9.

[0201] For example, 7.8≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≥7.

[0202] For example, 7.7≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≥6.8.

[0203] For example, 7.5≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≥7.1.

[0204] For example, 7.6≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≥7.2.

[0205] For example, 7.4≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≥7.3.

[0206] For example, such as Figure 7As shown, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.7 to 2.3. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.65 to 2.25. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.7 to 2.2. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.75 to 2.15. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.8 to 2.1. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.85 to 2.05. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.9 to 2.

[0207] For example, such as Figure 7 As shown, the nine light-emitting units 311, 312, 313, 314, 315, 316, 317, 318, and 319 can be evenly distributed. For example, light-emitting unit 315 can be located at the center of the quadrilateral formed by four light-emitting units 311, 312, 313, and 314.

[0208] For example, such as Figure 7 As shown, light-emitting unit 318 can be located between light-emitting unit 311 and light-emitting unit 312, light-emitting unit 319 can be located between light-emitting unit 311 and light-emitting unit 314, light-emitting unit 317 can be located between light-emitting unit 313 and light-emitting unit 314, and light-emitting unit 316 can be located between light-emitting unit 312 and light-emitting unit 313.

[0209] For example, the four sides of the quadrilateral pass through the centers of light-emitting units 318, 319, 317 and 316 respectively.

[0210] For example, the centers of light-emitting units 318, 319, 317 and 316 can be the centers of the four sides of a quadrilateral, respectively.

[0211] For example, such as Figure 7 As shown, the quadrilateral formed by connecting the centers of the four light-emitting units 311, 312, 313 and 314 in sequence can be a rectangle.

[0212] For example, the quadrilateral formed by connecting the centers of the four light-emitting units 311, 312, 313 and 314 in sequence can be a square.

[0213] For example, the angle between two sides of a quadrilateral and the first direction is 0 degrees, and the angle between the other two sides of the quadrilateral and the second direction is 0 degrees.

[0214] For example, such as Figure 7As shown, the shape of the light area 300 is a first square, and the quadrilateral formed by connecting the centers of the four light-emitting units 311, 312, 313 and 314 in sequence can be a second square. The angle between the diagonals of the first square and the second square is 0 degrees. For example, the diagonal of the first square can coincide with the diagonal of the second square.

[0215] For example, such as Figure 7 As shown, the pitch of the lamp area 300 is 4.46 mm, the pitch of the light-emitting unit 310 is 2.23 mm, and the size of the light-emitting unit 310 can be 0.22 mm × 0.22 mm. For example, the number of lamp areas 300 can be 2596, such as 44 lamp areas 300 arranged along one of the first and second directions, and 59 lamp areas 300 arranged along the other of the first and second directions. For example, the size of the lamp area 300 on the substrate can be 263 mm × 196 mm.

[0216] For example, Figure 7 The dimensions, materials, and light-emitting unit dimensions of the retaining wall in the example shown can be the same as the corresponding parameters in the above examples, and will not be repeated here.

[0217] For example, Figure 8 In the example shown, at least one light area 300 includes seven light-emitting units 311, 312, 313, 314, 315, 316, and 317. The centers of six light-emitting units 311, 312, 313, 314, 316, and 317 are connected sequentially to form a hexagon, or the seven light-emitting units 311, 312, 313, 314, 315, 316, and 317 are arranged in a hexagon. The angle between at least one of the first direction and the second direction and at least one side of the hexagon is 0 degrees. The aforementioned six light-emitting units 311, 312, 313, 314, 316, and 317 can be the six outermost light-emitting units or the six light-emitting units closest to the apex corner of the light area.

[0218] For example, such as Figure 8 As shown, the light area 300 includes 7 light-emitting units, and the distance from the center of the i-th light-emitting unit 310 to the apex corner of the light area 300 is L. i The value of i ranges from 1 to 7, and L i P and N satisfy: 8.5≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7)≥6.3.

[0219] For example, 8.3≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7)≥6.5.

[0220] For example, 8.1≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7)≥6.6.

[0221] For example, 8.2≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7)≥6.7.

[0222] For example, 8≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7)≥6.

[0223] For example, 7.9 ≥ P × (1 / L1 + 1 / L2 + 1 / L3 + 1 / L4 + 1 / L5 + 1 / L6 + 1 / L7) ≥ 6.9.

[0224] For example, 7.8≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7)≥7.

[0225] For example, 7.7≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7)≥6.8.

[0226] For example, 7.5≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7)≥7.1.

[0227] For example, 7.6≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7)≥7.2.

[0228] For example, 7.4≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7)≥7.3.

[0229] For example, such as Figure 8 As shown, the ratio of the pitch of the lamp area 300 to the side length of the hexagon is 1.7 to 2.3. For example, the ratio of the pitch of the lamp area 300 to the side length of the hexagon is 1.65 to 2.25. For example, the ratio of the pitch of the lamp area 300 to the side length of the hexagon is 1.7 to 2.2. For example, the ratio of the pitch of the lamp area 300 to the side length of the hexagon is 1.75 to 2.15. For example, the ratio of the pitch of the lamp area 300 to the side length of the hexagon is 1.8 to 2.1. For example, the ratio of the pitch of the lamp area 300 to the side length of the hexagon is 1.85 to 2.05. For example, the ratio of the pitch of the lamp area 300 to the side length of the hexagon is 1.9 to 2.

[0230] For example, such as Figure 8As shown, the seven light-emitting units 311, 312, 313, 314, 315, 316, and 317 can be evenly distributed. For example, light-emitting unit 315 can be located at the center of the hexagon formed by the six light-emitting units 311, 312, 313, 314, 316, and 317.

[0231] For example, such as Figure 8 As shown, the hexagon can be a regular hexagon.

[0232] For example, such as Figure 8 As shown, the angle between two sides of the hexagon and the first or second direction is 0 degrees.

[0233] For example, Figure 8 The dimensions, materials, and light-emitting unit dimensions of the retaining wall in the example shown can be the same as the corresponding parameters in the above examples, and will not be repeated here.

[0234] Of course, the embodiments disclosed herein are not limited to this; the number of light-emitting units in the lamp area can also be six, such as... Figure 8 The centrally located light-emitting unit 315 is removed. The number of light-emitting units in the light zone can be set according to the requirements of the backlight structure and the display panel.

[0235] For example, Figure 9 In the example shown, at least one light area 300 includes three light-emitting units 311, 312, and 313. The centers of the three light-emitting units 311, 312, and 313 are connected sequentially to form a triangle. The angle between at least one of the first direction and the second direction and at least one side of the triangle is 0 degrees. The three light-emitting units 311, 312, and 313 may be the three outermost light-emitting units.

[0236] For example, such as Figure 9 As shown, the light area 300 includes 3 light-emitting units, and the distance from the center of the i-th light-emitting unit 310 to the apex corner of the light area 300 is L. i The value of i ranges from 1 to 3, and L i P and N satisfy: 8.5≥P×(1 / L1+1 / L2+1 / L3)≥6.3.

[0237] For example, 8.3 ≥ P × (1 / L1 + 1 / L2 + 1 / L3) ≥ 6.5. For example, 8.1 ≥ P × (1 / L1 + 1 / L2 + 1 / L3) ≥ 6.6. For example, 8.2 ≥ P × (1 / L1 + 1 / L2 + 1 / L3) ≥ 6.7. For example, 8 ≥ P × (1 / L1 + 1 / L2 + 1 / L3) ≥ 6. For example, 7.9 ≥ P × (1 / L1 + 1 / L2 + 1 / L3) ≥ 6.9. For example, 7.8 ≥ P × (1 / L1 + 1 / L2 + 1 / L3) ≥ 7. For example, 7.7 ≥ P × (1 / L1 + 1 / L2 + 1 / L3) ≥ 6.8. For example, 7.5 ≥ P × (1 / L1 + 1 / L2 + 1 / L3) ≥ 7.1. For example, 7.6 ≥ P × (1 / L1 + 1 / L2 + 1 / L3) ≥ 7.2. For example, 7.4 ≥ P × (1 / L1 + 1 / L2 + 1 / L3) ≥ 7.3.

[0238] For example, such as Figure 9 As shown, the ratio of the pitch of lamp zone 300 to the side length of the triangle is 1.7 to 2.3. For example, the ratio of the pitch of lamp zone 300 to the side length of the triangle is 1.65 to 2.25. For example, the ratio of the pitch of lamp zone 300 to the side length of the triangle is 1.7 to 2.2. For example, the ratio of the pitch of lamp zone 300 to the side length of the triangle is 1.75 to 2.15. For example, the ratio of the pitch of lamp zone 300 to the side length of the triangle is 1.8 to 2.1. For example, the ratio of the pitch of lamp zone 300 to the side length of the triangle is 1.85 to 2.05. For example, the ratio of the pitch of lamp zone 300 to the side length of the triangle is 1.9 to 2.

[0239] For example, such as Figure 9 As shown, the three light-emitting units 311, 312 and 313 can be evenly distributed.

[0240] For example, such as Figure 9 As shown, the triangle can be an equilateral triangle.

[0241] For example, such as Figure 9 As shown, the angle between one side of the triangle and the first or second direction is 0 degrees.

[0242] Of course, the embodiments disclosed herein are not limited to this. In the triangle, one side may have an angle of 0 degrees with the first direction, and the other side may have an angle of 0 degrees with the second direction.

[0243] For example, such as Figure 9 As shown, the pitch of the lamp area 300 is 4.8 mm, the pitch of the light-emitting unit 310 is 2.6 mm, and the size of the light-emitting unit 310 can be 0.219 mm × 0.219 mm.

[0244] For example, Figure 9The dimensions, materials, and light-emitting unit dimensions of the retaining wall in the example shown can be the same as the corresponding parameters in the above examples, and will not be repeated here.

[0245] Figure 10 This is a partial planar structural schematic diagram of a backlight structure provided according to another example of an embodiment of the present disclosure. For example... Figure 10 As shown, the backlight structure includes a substrate 100, a barrier pattern 200 disposed on the substrate 100, and a plurality of light-emitting units 310. The barrier pattern 200 includes a plurality of openings 210 arranged in an array along a first direction and a second direction, and a barrier 220 surrounding each opening 210. The plurality of openings 210 are configured to define a plurality of lamp areas 300, and the first direction and the second direction intersect. The plurality of light-emitting units 310 are distributed within the plurality of lamp areas 300. The substrate 100 includes a central region 101 and an edge region 102 surrounding the central region 101. At least three light-emitting units 310 are disposed in each lamp area 300 located at least in the central region 101. The centers of the M light-emitting units 310 closest to the apex of the lamp area 300 are sequentially connected to form an M-sided polygon. The distance between the center of the M-sided polygon and the center of the lamp area 300 is less than 10% of the pitch P of the lamp area 300. The angles between the first direction and the second direction and each side of the M-sided polygon are both greater than 0 degrees.

[0246] The backlight structure provided in this disclosure improves the uniformity of light output in the lamp area by setting the angle between the side of the M-gon and the first and second directions.

[0247] For example, one of the first direction and the second direction is Figure 10 The X direction shown, the first direction and the other of the second direction can be... Figure 10 The Y direction shown in this embodiment is illustratively described using the first direction as the X direction and the second direction as the Y direction.

[0248] For example, the first direction and the second direction are perpendicular. For example, the angle between the first direction and the second direction can be 80-110 degrees, or 85-100 degrees, or 88-92 degrees. The embodiments disclosed herein are not limited thereto, and the first direction and the second direction can be interchanged.

[0249] For example, such as Figure 10As shown, the angles between the first and second directions and each side of the M-sided polygon are all greater than 0.5 degrees. For example, the angles between the first and second directions and each side of the M-sided polygon are all greater than 1 degree. For example, the angles between the first and second directions and each side of the M-sided polygon are all greater than 2 degrees. For example, the angles between the first and second directions and each side of the M-sided polygon are all greater than 3 degrees. For example, the angles between the first and second directions and each side of the M-sided polygon are all greater than 4 degrees. For example, the angles between the first and second directions and each side of the M-sided polygon are all greater than 5 degrees. For example, the angles between the first and second directions and each side of the M-sided polygon are all greater than 5.5 degrees. For example, the angles between the first and second directions and each side of the M-sided polygon are all greater than 6 degrees. For example, the angles between the first and second directions and each side of the M-sided polygon are all greater than 6.5 degrees. For example, the angles between the first and second directions and each side of the M-sided polygon are all greater than 7 degrees. For example, the angles between the first and second directions and each side of the M-sided polygon are all greater than 8 degrees. For example, the angles between the first and second directions and each side of the M-gon are all greater than 9 degrees. For example, the angles between the first and second directions and each side of the M-gon are all greater than 10 degrees. For example, the angles between the first and second directions and each side of the M-gon are all greater than 10.5 degrees. For example, the angles between the first and second directions and each side of the M-gon are all greater than 11 degrees. For example, the angles between the first and second directions and each side of the M-gon are all greater than 12 degrees.

[0250] For example, such as Figure 10 As shown, the angle between the first direction and one side of the M-gon can be the same as the angle between the second direction and another side of the M-gon.

[0251] Of course, the embodiments disclosed herein are not limited to this. The angle between the first direction and one side of the M-gon may be different from the angle between the second direction and any side of the M-gon.

[0252] For example, such as Figure 10 As shown, multiple openings 210 correspond one-to-one with multiple light zones 300, and each opening 210 is used to define a light zone 300.

[0253] For example, the number of light-emitting units 310 distributed in different light zones 300 can be the same or different.

[0254] For example, the number of light-emitting units 310 distributed in a portion of the lamp area 300 in one region of the substrate 100 is the same, while the number of light-emitting units 310 distributed in a portion of the lamp area 300 in another region of the substrate 100 is different. The positions of the aforementioned one region and the other region can be set according to product requirements. For example, the aforementioned one region can be located in the central region of the substrate, and the aforementioned other region can be located in the edge region of the substrate; or the aforementioned one region can be located in the edge region of the substrate, and the aforementioned other region can be located in the central region of the substrate; or the aforementioned one region and the aforementioned other region are both located in different edge regions of the substrate.

[0255] For example, such as Figure 10 As shown, the central region 101 of the substrate 100 may include at least one lamp area 300.

[0256] For example, the middle area 101 may include two light zones 300, four light zones 300, or more light zones 300.

[0257] For example, the edge region 102 includes at least one ring of light areas 300 located at the edge, the at least one ring of light areas 300 including two columns of light areas 300 located on both sides of the middle region 101 in a first direction and two rows of light areas 300 located on both sides of the middle region 101 in a second direction.

[0258] For example, such as Figure 10 As shown, the number of light-emitting units 310 provided in each lamp zone 300 located in the middle region 101 and the edge region 102 is the same. However, it is not limited to this, and the number of lamp zones included in the middle region and the edge region, as well as the number of light-emitting units included in each lamp zone, can be set according to product requirements.

[0259] For example, such as Figure 10 As shown, M is not greater than the number of light-emitting units 310 provided in each light zone 300. For example, the shape of M can be triangular, quadrilateral, hexagonal, etc., and this embodiment of the present disclosure does not limit this.

[0260] For example, such as Figure 10 As shown, each of the light zones 300 has at least three light-emitting units 310.

[0261] For example, each light zone 300 can be equipped with three light-emitting units 310, or four light-emitting units 310, or five light-emitting units 310, or six light-emitting units 310, etc.

[0262] For example, such as Figure 10 As shown, the shape of the light area 300 can be polygonal, such as triangle, quadrilateral, or hexagon.

[0263] The center of the aforementioned light-emitting unit refers to the geometric center of the light-emitting unit, such that the orthographic projection of this geometric center onto the substrate coincides with the center of the two-dimensional plane of the orthographic projection of the light-emitting unit onto the substrate. The line connecting the centers of the aforementioned M light-emitting units sequentially can refer to the line connecting the centers of the M light-emitting units clockwise or counterclockwise.

[0264] For example, such as Figure 10 As shown, the pitch P of the lamp area 300 can be the length of the center line connecting adjacent lamp areas 300 arranged in the first direction, or the length of the center line connecting adjacent lamp areas 300 arranged in the second direction.

[0265] For example, the pitch of lamp zone 300 in the first direction can be 0.9 to 1.1 in ratio to the pitch of lamp zone 300 in the second direction, or the two pitches can be equal.

[0266] For example, such as Figure 10As shown, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 9.5% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 9% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 8.5% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 8% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 7.5% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 7% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 6.5% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 6% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 5.5% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 5% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 4.5% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 4% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 3% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 2.5% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 2% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 1.5% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 1% of the pitch P of the lamp area 300. For example, the distance between the center C1 of the M-sided polygon and the center C2 of the lamp area 300 is less than 0.5% of the pitch P of the lamp area 300.

[0267] For example, such as Figure 10 As shown, the center C1 of the M-sided polygon coincides with the center C2 of the lamp area 300.

[0268] In some examples, such as Figure 10 As shown, the ratio of different side lengths of the M-gon is 0.9 to 1.1, and the ratio of the pitch P of the lamp area 300 to the side length of the M-gon is 1.7 to 2.3.

[0269] For example, such as Figure 10 As shown, the ratio of the different side lengths of the M-gon is 0.98 to 1.08. For example, the ratio of the different side lengths of the M-gon is 0.96 to 1.04. For example, the ratio of the different side lengths of the M-gon is 0.95 to 1.05. For example, the ratio of the different side lengths of the M-gon is 0.92 to 1.02.

[0270] For example, such as Figure 10 As shown, all sides of the M-gon are of equal length, P'.

[0271] For example, the ratio of the pitch P of lamp zone 300 to the side length P' of the M-gon is 1.65 to 2.25. For example, the ratio of the pitch P of lamp zone 300 to the side length P' of the M-gon is 1.7 to 2.2. For example, the ratio of the pitch P of lamp zone 300 to the side length P' of the M-gon is 1.75 to 2.15. For example, the ratio of the pitch P of lamp zone 300 to the side length P' of the M-gon is 1.8 to 2.1. For example, the ratio of the pitch P of lamp zone 300 to the side length P' of the M-gon is 1.85 to 2.05. For example, the ratio of the pitch P of lamp zone 300 to the side length P' of the M-gon is 1.9 to 2.

[0272] For example, such as Figure 10 As shown, the pitch P of the lamp area 300 is twice the side length P' of the M-gon.

[0273] For example, Figure 10 The light-emitting unit 310 shown satisfies Figures 3A to 3B The cosine light source shown is governed by Lambert's cosine law for Lambert light sources.

[0274] In some examples, Figure 10 The light-emitting unit 310 shown includes Figure 2A The light-emitting diode chip 323 shown and the packaging structure 324 configured to encapsulate the light-emitting diode chip 323 are provided with a gap between the packaging structures 324 of adjacent light-emitting units 310.

[0275] For example, the light-emitting diode chip 323 can be a sub-millimeter light-emitting diode chip (miniLED). The size of the unpackaged light-emitting diode chip 323 in the direction perpendicular to the substrate 100 can be 70 micrometers to 180 micrometers, and the maximum size of the unpackaged light-emitting diode chip 323 in the direction parallel to the substrate 100 is no more than 500 micrometers.

[0276] For example, the packaged light-emitting diode chip is the light-emitting unit 310. The maximum size and thickness of the packaged light-emitting diode chip 323 in the direction parallel to the substrate 100 are larger than the corresponding parameters of the unpackaged light-emitting diode chip 323.

[0277] For example, such as Figure 2A As shown, a single light-emitting diode chip 323 can be packaged into an independent device to form a light-emitting unit 310, and then placed in the corresponding position on the backlight structure and fixedly connected to the pads on the substrate 100.

[0278] Since an unpackaged LED chip can be considered a Lambertian light emitter, when the LED chip is packaged, the light emission angle range is +α. 1 / 2 to -α 1 / 2 The light rays inside can be emitted, while +α 1 / 2 to -α 1 / 2 The light rays emitted from the light-emitting unit 310 are essentially confined within the independent device due to total internal reflection. In this case, the angle θ between the outermost ray emitted by the light-emitting unit 310 and the substrate 100 can be α. 1 / 2 The complementary angle.

[0279] For example, such as Figure 2A As shown, the light-emitting unit 310 or the light-emitting diode chip 323 is connected to the pad 321 on the substrate 100 via solder metal 322.

[0280] For example, welding metal 322 may include solder.

[0281] For example, such as Figure 2A As shown, the encapsulation structure 324 can be doped with color conversion material 325.

[0282] For example, color conversion material 325 may include phosphor material or quantum dot material.

[0283] For example, color conversion material 325 may include a material that converts blue light into white light.

[0284] For example, color conversion material 325 may include materials that convert blue light into red and green light. Of course, the packaging structure may also be free of color conversion material.

[0285] For example, such as Figure 2A As shown, the LED chip 323 can also be placed on the corresponding position on the substrate 100 before encapsulation.

[0286] For example, each LED chip can be encapsulated using a transparent material, such as transparent silicone, through screen printing or dot printing to form an encapsulation structure 324. Depending on the shape of the encapsulation structure 324, the light emission angle of the LED chip 323 can be modulated, thereby changing the light emission angle of the light-emitting unit 310.

[0287] For example, such as Figure 2AAs shown, the surface of the packaging structure 324 away from the substrate 100 can be curved, and the emission angle of the outermost light ray emitted by the light-emitting unit 310 is slightly larger than the α angle of the light-emitting diode chip 323. 1 / 2 If α 1 / 2 If the value range is 40° to 65°, then the range of the light emission angle of the outermost light ray emitted by the light-emitting unit 310 can be 50° to 70°.

[0288] For example, the package structure 324 can have any desired size in the direction perpendicular to the substrate 100. For example, the size of the package structure 324 in the direction perpendicular to the substrate 100 can be less than 0.5 mm. For example, the size of the package structure 324 in the direction perpendicular to the substrate 100 can be between 0.1 and 0.4 mm. For example, the size of the package structure 324 in the direction perpendicular to the substrate 100 can be between 0.2 and 0.4 mm. For example, the size of the package structure 324 in the direction perpendicular to the substrate 100 can be less than 0.3 mm. For example, the size of the package structure 324 in the direction perpendicular to the substrate 100 can be between 0.25 and 0.35 mm. For example, the size of the package structure 324 in the direction perpendicular to the substrate 100 can be between 0.15 and 0.25 mm. For example, the size of the package structure 324 in the direction perpendicular to the substrate 100 can be approximately 0.2 mm. For example, the size of the package structure 324 in the direction perpendicular to the substrate 100 can be approximately 0.3 mm.

[0289] For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 can be between 0.3 and 2.5 mm. For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 can be between 0.3 and 2.5 mm. For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 can be between 0.3 and 0.7 mm. For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 can be between 0.8 and 0.9 mm. For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 can be greater than 0.5 mm. For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 can be greater than 1.0 mm. For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 can be greater than 2.0 mm. For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 can be less than 2.0 mm, etc.

[0290] For example, after being packaged as an independent device, the geometric center of the LED chip projected onto the substrate can coincide with the geometric center of the independent device projected onto the substrate. However, it is not limited to this. The geometric center of the LED chip projected onto the substrate can also be offset relative to the geometric center of the independent device projected onto the substrate. The height of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is the height of the packaged LED chip.

[0291] For example, the maximum size of each light-emitting unit 310 in the direction perpendicular to the substrate 100 is no more than 2 mm.

[0292] For example, such as Figure 10 As shown, the size of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is no greater than 200 micrometers. For example, the size of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is no greater than 180 micrometers. For example, the size of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is no greater than 160 micrometers. For example, the size of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is no greater than 150 micrometers. For example, the size of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is no greater than 140 micrometers. For example, the size of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is no greater than 130 micrometers. For example, the size of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is no greater than 120 micrometers. For example, the size of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is no greater than 110 micrometers. For example, the size of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is no greater than 100 micrometers. The size of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is the height of the light-emitting unit 310.

[0293] In some examples, such as Figure 2A As shown, the height of the light-emitting unit 310 is 50–100 micrometers.

[0294] In some examples, such as Figure 2A As shown, the height of the light-emitting unit 310 is 80–100 micrometers.

[0295] For example, the height of the light-emitting unit 310 is 55–95 micrometers. For example, the height of the light-emitting unit 310 is 60–90 micrometers. For example, the height of the light-emitting unit 310 is 70–85 micrometers. For example, the height of the light-emitting unit 310 is 75–80 micrometers.

[0296] For example, such as Figure 10 As shown, the maximum size of the light-emitting unit 310 in the direction parallel to the substrate 100 is no more than 3 mm.

[0297] In some examples, such as Figure 10As shown, the maximum size of the light-emitting unit 310 in the direction parallel to the substrate 100 is no greater than 500 micrometers. For example, the maximum size of the light-emitting unit 310 in the direction parallel to the substrate 100 is no greater than 450 micrometers. For example, the maximum size of the light-emitting unit 310 in the direction parallel to the substrate 100 is no greater than 400 micrometers. For example, the maximum size of the light-emitting unit 310 in the direction parallel to the substrate 100 is no greater than 350 micrometers. For example, the maximum size of the light-emitting unit 310 in the direction parallel to the substrate 100 is no greater than 330 micrometers. For example, the maximum size of the light-emitting unit 310 in the direction parallel to the substrate 100 is no greater than 300 micrometers. For example, the maximum size of the light-emitting unit 310 in the direction parallel to the substrate 100 is no greater than 280 micrometers.

[0298] For example, such as Figure 10 As shown, the size of the light-emitting unit 310 in at least one of the first and second directions is no greater than 250 micrometers. For example, the size of the light-emitting unit 310 in at least one of the first and second directions is no greater than 240 micrometers. For example, the size of the light-emitting unit 310 in at least one of the first and second directions is no greater than 230 micrometers. For example, the size of the light-emitting unit 310 in at least one of the first and second directions is no greater than 220 micrometers. For example, the size of the light-emitting unit 310 in both the first and second directions is 219 micrometers.

[0299] The shape of the light-emitting unit can refer to the shape of the orthographic projection of the light-emitting unit onto the substrate.

[0300] For example, the shape of the light-emitting unit can be quadrilateral, such as a rectangle, and the maximum dimension of the light-emitting unit in the direction parallel to the substrate can be the length of the diagonal of the quadrilateral.

[0301] For example, if the shape of the light-emitting unit is elliptical, then the maximum dimension of the light-emitting unit in the direction parallel to the substrate can be the length of the major axis of the ellipse.

[0302] For example, if the shape of the light-emitting unit is circular, then the maximum dimension of the light-emitting unit in the direction parallel to the substrate can be the diameter.

[0303] Of course, the embodiments disclosed herein are not limited thereto. Figure 10 The light-emitting unit in the example shown can also be as follows: Figure 2B As shown, only the unpackaged light-emitting diode chip 323 is included, and the maximum size of the unpackaged light-emitting diode chip 323 in the direction parallel to the substrate 100 is no more than 500 micrometers.

[0304] Figure 11 An example of an embodiment of this disclosure is provided along Figure 10 A schematic diagram of the local cross-section structure intercepted by line BB'.

[0305] In some examples, such as Figure 11 As shown, in the direction perpendicular to the substrate 100, the thickness of the barrier 220 is greater than the height of the light-emitting unit 310.

[0306] In some examples, such as Figure 11 As shown, the thickness of the barrier 220 is 200–400 micrometers, and the height of the light-emitting unit 310 is 50–100 micrometers. The thickness of the barrier 220 refers to its dimension in the direction perpendicular to the substrate 100.

[0307] In some examples, such as Figure 11 As shown, the thickness of retaining wall 220 is 250–270 micrometers.

[0308] For example, the thickness of the retaining wall 220 can be 210–390 micrometers. For example, the thickness of the retaining wall 220 can be 220–370 micrometers. For example, the thickness of the retaining wall 220 can be 230–350 micrometers. For example, the thickness of the retaining wall 220 can be 235–320 micrometers. For example, the thickness of the retaining wall 220 can be 240–300 micrometers. For example, the thickness of the retaining wall 220 can be 245–280 micrometers.

[0309] In some examples, such as Figure 11 As shown, the width of the barrier 220 is 350–500 micrometers. The width of the barrier 220 refers to the dimension of the barrier 220 between two adjacent lamp areas 300 in the first direction, or the dimension of the barrier 220 between two adjacent lamp areas 300 in the second direction.

[0310] For example, such as Figure 11 As shown, the width of the retaining wall 220 is 370–480 micrometers. For example, the width of the retaining wall 220 can be 350–450 micrometers. For example, the width of the retaining wall 220 can be 360–440 micrometers. For example, the width of the retaining wall 220 can be 370–430 micrometers. For example, the width of the retaining wall 220 can be 380–420 micrometers. For example, the width of the retaining wall 220 can be 390–410 micrometers. For example, the width of the retaining wall 220 can be 400 micrometers.

[0311] In some examples, such as Figure 11 As shown, the barrier 220 includes a light-blocking material. For example, the material of the barrier 220 may include black resin.

[0312] In some examples, such as Figure 10As shown, the light-emitting units 310 in each light zone 300 are electrically connected. For example, multiple light-emitting units 310 in each light zone 300 are connected in series. For example, multiple light-emitting units 310 in each light zone 300 are connected in parallel.

[0313] In the backlight structure disclosed herein, by surrounding each light zone with a light-shielding barrier, crosstalk between different light zones is reduced, and halo phenomenon is improved.

[0314] In some examples, such as Figure 10 As shown, at least a portion of the light area 300 has a rectangular shape, in which two adjacent sides extend along a first direction and a second direction, respectively.

[0315] For example, all light zones 300 are rectangular in shape. Alternatively, different light zones 300 may have the same shape and size.

[0316] Of course, the embodiments disclosed herein are not limited thereto. Depending on the product requirements, the substrate can be divided into multiple regions, and the size of the lamp area in different regions can be different, while the size of the lamp area in the same region can be the same.

[0317] Figure 12 for Figure 10 The diagram shows a light-emitting unit in a light area. Figure 12 The example shown schematically illustrates a light area comprising four light-emitting units, with the M-sided polygon being a quadrilateral.

[0318] For example, such as Figure 12 As shown, the shape of a lamp area 300 can be square, and the M-sided polygon formed by the center line connecting the four light-emitting units 310 in the lamp area 300 can also be square.

[0319] For example, such as Figure 12 As shown, the light intensity I1 in region E1 can be determined according to... Figure 5 The calculation method shown yields the relationship I1=I0×m×h×(1 / L1+1 / L2+…+1 / L N N is the number of light-emitting units in the lamp area. Figure 12 The N shown can be 4.

[0320] In some examples, such as Figure 10 and Figure 12 As shown, the above relationship I1=I0×m×h×(1 / L1+1 / L2+…+1 / L N Treating I0, m, and h as constants, each of the at least some light areas 300 includes N light-emitting units 310, where N ≥ M, and the distance from the center of the i-th light-emitting unit 310 to the apex of the light area 300 is L. i The value of i ranges from 1 to N, and L iP and N satisfy: 8.5 ≥ P × (1 / L1 + 1 / L2 + ... + 1 / L N )≥6.3. Where P×(1 / L1+1 / L2+…+1 / L N It can be used as an approximate reference value for the unitless relative light intensity at the edge location.

[0321] For example, 8.3 ≥ P × (1 / L1 + 1 / L2 + ... + 1 / L) N )≥6.5. For example, 8.1≥P×(1 / L1+1 / L2+…+1 / L N )≥6.6. For example, 8.2≥P×(1 / L1+1 / L2+…+1 / L N )≥6.7. For example, 8≥P×(1 / L1+1 / L2+…+1 / L N )≥6. For example, 7.9≥P×(1 / L1+1 / L2+…+1 / L N )≥6.9. For example, 7.8≥P×(1 / L1+1 / L2+…+1 / L N )≥7. For example, 7.7≥P×(1 / L1+1 / L2+…+1 / L N )≥6.8. For example, 7.5≥P×(1 / L1+1 / L2+…+1 / L N )≥7.1. For example, 7.6≥P×(1 / L1+1 / L2+…+1 / L N )≥7.2. For example, 7.4≥P×(1 / L1+1 / L2+…+1 / L N )≥7.3.

[0322] The top corner of the aforementioned light area can refer to Figure 12 The E1 region is shown.

[0323] For example, such as Figure 12 As shown, the lamp area 300 includes 4 light-emitting units. The distance from the center of the i-th light-emitting unit 310 to the apex of the lamp area 300 is Li, and the value of i ranges from 1 to 4. Li, P and N satisfy: 8.5≥P×(1 / L1+1 / L2+1 / L3+1 / L4)≥6.3.

[0324] For example, such as Figure 12 As shown, taking a lamp zone 300 with a pitch of 4.46 mm and a quadrilateral side length of 2.23 mm as an example, the value of L1 is 1.123379 μm, the value of L2 is 3.363531 μm, the value of L3 is 4.149638 μm, and the value of L4 is 2.669986 μm. Substituting the above parameter values ​​into P×(1 / L1+1 / L2+…+1 / L…), we can obtain the values ​​of L1, L2, L3, L4, L4, L5, L6 ...6, L7, N We get P×(1 / L1+1 / L2+…+1 / L) N = 8.04.

[0325] For example, such as Figure 10 and Figure 12 As shown, the light area 300 includes four light-emitting units 310 forming a quadrilateral, and the angle between one of the first direction and the second direction and at least one side of the quadrilateral is 12 degrees.

[0326] For example, such as Figure 12 As shown, the shape of the light area 300 is a first square. The light area 300 includes four light-emitting units 310 whose centers are connected in sequence to form a second square. The angle between the diagonal of the first square and the diagonal of the second square is 12 degrees.

[0327] This embodiment of the invention improves the light intensity of the edge region of the lamp area by rotating the M-sided shape formed by the light-emitting units in the lamp area so that neither side of the M-sided shape is parallel to the first direction and the second direction.

[0328] In some examples, such as Figure 12 As shown, the ratio of the light intensity at the edge of the light area 300, such as area E1, to the light intensity at the center of the light area 300 is not less than 0.5.

[0329] For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.55. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.6. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.65. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.7. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.75. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.8. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.85. For example, the ratio of the light intensity at the edge of the light area 300 to the light intensity at the center of the light area 300 is not less than 0.9.

[0330] For example, such as Figure 10 and Figure 12As shown, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.7 to 2.3. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.65 to 2.25. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.7 to 2.2. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.75 to 2.15. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.8 to 2.1. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.85 to 2.05. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.9 to 2.

[0331] In some examples, such as Figure 10 and Figure 12 As shown, at least a portion of the light area 300 has a rectangular shape, in which two adjacent sides extend along a first direction and a second direction, respectively.

[0332] For example, each light zone 300 is rectangular in shape.

[0333] For example, at least part of the light area 300 is square in shape.

[0334] In some examples, such as Figure 10 , Figure 3A and Figure 12 As shown, the luminous intensity distribution I of the light-emitting unit 310 satisfies: I = I0cosmα, where I0 is the luminous intensity distribution in the direction perpendicular to the normal to the light-emitting surface of the light-emitting unit 310, α is the angle between the luminous direction of the light-emitting unit 310 and the normal, and m = (-ln2) / (lncosα). 1 / 2 ), α 1 / 2 The angle between the luminous direction and the normal when the luminous intensity drops to half of the luminous intensity corresponding to the normal direction is given by the luminous unit 310. The optical path length of the light emitted in the normal direction is h. Each lamp area 300 of at least some lamp areas 300 includes N luminous units 310, where N ≥ M, and the distance from the center of the i-th luminous unit 310 to the apex angle of the lamp area 300 is L. i The value of i ranges from 1 to N, and L i h and N satisfy: 0.5≥cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L2)] N )]≥0.23.

[0335] For example, such as Figure 10 and Figure 12As shown, when the emitted light angle θ of the light-emitting unit 310 is very small, tanθ≈θ=h / L. Substituting tanθ≈θ=h / L and α=(π / 2)-θ into the formula cosmα, we get cosmα=cosm×[(π / 2)-θ]≈cosm×[(π / 2)-(h / L)]. Therefore, Figure 12 The light intensity at position E1 is shown as I1 = I0 × cosm × [(π / 2) - (h / L1)] + I0 × cosm × [(π / 2) - (h / L2)] + ... + I0 × cosm × [(π / 2) - (h / L1)] N N is the number of light-emitting units in the lamp area. Figure 12 The N shown can be 4, then I1=I0×cosm×[(π / 2)-(h / L1)]+I0×cosm×[(π / 2)-(h / L2)]+I0×cosm×[(π / 2)-(h / L3)]+I0×cosm×[(π / 2)-(h / L N )).

[0336] The above relation 2: I1=I0×cosm×[(π / 2)-(h / L1)]+I0×cosm×[(π / 2)-(h / L2)]+…+I0×cosm×[(π / 2)-(h / L2)] N ] can also be expressed as I1=I0×S. Where m is approximately equal to 1.

[0337] For example, if the pitch of the lamp area 300 is 4.46 mm and the pitch of the light-emitting unit 310 is 2.23 mm, then S = 0.285151.

[0338] For example, 0.48≥cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )]≥0.25.

[0339] For example, 0.45≥cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )]≥0.27.

[0340] For example, 0.42≥cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )]≥0.28.

[0341] For example, 0.4≥cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )]≥0.3.

[0342] For example, 0.38≥cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )]≥0.32.

[0343] For example, 0.36≥cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )]≥0.35.

[0344] In another example of the embodiments of this disclosure, no changes are made. Figure 12 The angle between the side of the M-gon and the first and second directions, such as an angle of 12 degrees, applies only to the direction shown. Figure 12 The pitch of the lamp area 300 and the side length of the M-sided polygon formed by the light-emitting units 310 are adjusted. For example, if the pitch of the lamp area 300 is adjusted to 5.12 mm and the side length of the M-sided polygon is 2.56 micrometers, then the value of L1 is 1.162167 micrometers, the value of L2 is 4.156017 micrometers, the value of L3 is 5.113352 micrometers, and the value of L4 is 3.43394 micrometers.

[0345] For example, substitute the above parameter values ​​into P×(1 / L1+1 / L2+…+1 / L) N We get P×(1 / L1+1 / L2+…+1 / L) N =8.13.

[0346] For example, substituting the above parameter values ​​into S = cosm × [(π / 2) - (h / L1)] + cosm × [(π / 2) - (h / L2)] + ... + cosm × [(π / 2) - (h / L1)] N The result is S = 0.323765.

[0347] The backlight structure provided in this embodiment of the present disclosure, by rotating the M-sided shape formed by the light-emitting units in the lamp area while adjusting the pitch of the lamp area and the side length of the M-sided shape, is beneficial to further improve the light intensity of the edge area of ​​the lamp area.

[0348] Figures 13A to 13G This is a schematic diagram of a light zone provided according to another example of an embodiment of the present disclosure. Figure 14 To be Figures 13A to 13GThe diagram shows the relationship between the relative light intensity at the edge of the lamp area after rotating the M-sided polygon at different angles.

[0349] Figure 14 The relative light intensity shown can refer to the value of Q at the edge of the lamp area, where Q = P × (1 / L1 + 1 / L2 + ... + 1 / L) N ).

[0350] In this embodiment of the disclosure, rotating the M-sided polygon by different angles can refer to rotating the M-sided polygon by a certain angle with the center of the M-sided polygon as the center, such as rotating the square by a certain angle with the center of the square as the center.

[0351] The aforementioned rotation can refer to the M-sided polygon rotating clockwise or counterclockwise.

[0352] Figures 13A to 13G The light area shown is Figure 12 The differences in the light areas shown include the different angles between the sides of the M-gon and the first and second directions.

[0353] For example, Figure 13A The angle between side M1 of the M-gon M01 and the first direction can be 5 degrees. Figure 13B The angle between side M1 of the M-gon M02 shown and the first direction can be 10 degrees. Figure 13C The angle between side M1 of the M-gon M03 shown and the first direction can be 13 degrees. Figure 13D The angle between side M1 of the M-gon M04 shown and the first direction can be 15 degrees. Figure 13E The angle between side M1 of the M-gon M05 shown and the first direction can be 17 degrees. Figure 13F The angle between side M1 of the M-gon M06 shown and the first direction can be 20 degrees. Figure 13G The angle between side M1 of the M-gon M07 shown and the first direction can be 30 degrees.

[0354] For example, Figure 13A The angle between the diagonal 392 of the second square M01 and the diagonal 391 of the first square can be 5 degrees. Figure 13B The angle between the diagonal 392 of the second square M02 and the diagonal 391 of the first square can be 10 degrees. Figure 13C The angle between the diagonal 392 of the second square M03 and the diagonal 391 of the first square can be 13 degrees. Figure 13D The angle between the diagonal 392 of the second square M04 and the diagonal 391 of the first square can be 15 degrees. Figure 13EThe angle between the diagonal 392 of the second square M05 and the diagonal 391 of the first square can be 17 degrees. Figure 13F The angle between the diagonal 392 of the second square M06 and the diagonal 391 of the first square can be 20 degrees. Figure 13G The angle between the diagonal 392 of the second square M07 and the diagonal 391 of the first square can be 30 degrees.

[0355] Of course, the embodiments disclosed herein are not limited to rotating the M-sided polygon by the above-mentioned degree; the degree of rotation of the M-sided polygon can be selected according to product requirements.

[0356] In some examples, such as Figures 13A to 13G , Figure 14 As shown, each of the at least some light areas 300 includes at least four light-emitting units 310, which are arranged in an M-sided shape. The angle between one of the first direction and the second direction and at least one side of the M-sided shape is 12 to 18 degrees.

[0357] In some examples, such as Figures 13A to 13G , Figure 14 As shown, each of the at least partial light areas 300 is in the shape of a first square. Each of the at least partial light areas 300 includes at least four light-emitting units 310. The centers of the four light-emitting units 310 closest to the four vertices of the light area 300 are connected sequentially to form a second square. The angle between the diagonal of the first square and the diagonal of the second square is 12 to 18 degrees.

[0358] For example, such as Figures 13A to 13G , Figure 14 As shown, each of the at least some light areas 300 includes four light-emitting units 311, 312, 313 and 314, which are arranged in a quadrilateral. The angle between one of the first direction and the second direction and at least one side of the quadrilateral is 12 to 18 degrees.

[0359] For example, such as Figures 13A to 13G As shown, the shape of the lamp area 300 is a first square, and the centers of the four light-emitting units 310 included in the lamp area 300 are connected sequentially to form a second square. The angle between the diagonals of the first square and the second square can be 5 degrees, 10 degrees, 13 degrees, 15 degrees, 17 degrees, 20 degrees, or 30 degrees. Of course, the embodiments of this disclosure are not limited to the above-mentioned angles between the diagonals of the first square and the second square; the angle between the diagonals of the first square and the second square can be selected according to product requirements.

[0360] For example, such as Figures 13A to 13G As shown, the ratio of the pitch of lamp area 300 to the side length of the second square is 1.7 to 2.3. For example, the ratio of the pitch of lamp area 300 to the side length of the second square is 1.65 to 2.25. For example, the ratio of the pitch of lamp area 300 to the side length of the second square is 1.7 to 2.2. For example, the ratio of the pitch of lamp area 300 to the side length of the second square is 1.75 to 2.15. For example, the ratio of the pitch of lamp area 300 to the side length of the second square is 1.8 to 2.1. For example, the ratio of the pitch of lamp area 300 to the side length of the second square is 1.85 to 2.05. For example, the ratio of the pitch of lamp area 300 to the side length of the second square is 1.9 to 2.

[0361] For example, such as Figures 13A to 13G As shown, the light intensity at the edge of the lamp area 300, such as the corner area, satisfies I1=I0×m×h×(1 / L1+1 / L2+…+1 / L N ), where the distance from the center of the i-th light-emitting unit 310 to the apex of the lamp area 300 is L. i The pitch P of the lamp zone 300 and the number N of the light-emitting units 310 satisfy: 8.5 ≥ P × (1 / L1 + 1 / L2 + ... + 1 / L N )≥6.3.

[0362] For example, such as Figures 13A to 13G As shown, Q=P×(1 / L1+1 / L2+1 / L3+1 / L4), 8.5≥Q≥6.3.

[0363] For example, such as Figures 13A to 13G As shown, the size of the light-emitting unit 310 can be 0.219mm × 0.219mm.

[0364] For example, such as Figures 13A to 13G , Figure 14As shown, taking a pitch of 4.8 mm for lamp area 300, a pitch of 2.6 mm for light-emitting unit 310, and a side length of 2.6 mm for the M-sided polygon as an example, when the angle between the side M1 of the second square and the first direction (i.e., the angle between the diagonal of the first square and the diagonal of the second square) is 0 degrees, Q = 6.521148; when the angle between the side M1 of the second square and the first direction is 5 degrees, Q = 6.386526; and when the angle between the side M1 of the second square and the first direction is 10 degrees, Q = 6.35310. 3; When the angle between the side M1 of the second square and the first direction is 13 degrees, Q = 6.409105; when the angle between the side M1 of the second square and the first direction is 15 degrees, Q = 6.677322; when the angle between the side M1 of the second square and the first direction is 17 degrees, Q = 6.325694; when the angle between the side M1 of the second square and the first direction is 20 degrees, Q = 6.161672; when the angle between the side M1 of the second square and the first direction is 30 degrees, Q = 6.117308. Therefore, after rotating the M-sided polygon by different angles, the relative light intensity at the edge of the lamp area first increases and then decreases with increasing angle.

[0365] For example, such as Figure 14 As shown, when the rotation angle of the M-sided polygon, such as the second square, is 12 to 18 degrees, the relative light intensity Q at the edge of the lamp area is relatively large.

[0366] The backlight structure provided in this embodiment adjusts the angle of the M-sided shape formed by the arrangement of light-emitting units in the lamp area to a certain range, such as 12 to 18 degrees, and sets the lamp area pitch and the side length of the M-sided shape, which helps to improve the light intensity at the edge of the lamp area, thereby improving the uniformity of light output in the lamp area.

[0367] For example, the angle between the diagonals of the first square and the second square is 13 to 17 degrees. For example, the angle between the diagonals of the first square and the second square is 14.5 to 16.5 degrees. For example, the angle between the diagonals of the first square and the second square is 15 to 16 degrees.

[0368] For example, such as Figures 13A to 13G As shown, the ratio of the light intensity at the edge of the light area 300, such as the top corner area, to the light intensity at the center of the light area 300 is not less than 0.5.

[0369] For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.55. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.6. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.65. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.7. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.75. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.8. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.85. For example, the ratio of the light intensity at the edge of the light area 300 to the light intensity at the center of the light area 300 is not less than 0.9.

[0370] Figures 15A to 15G This is a schematic diagram of a light zone provided according to another example of an embodiment of the present disclosure. Figure 16 To be Figures 15A to 15G The diagram shows the relationship between the relative light intensity at the edge of the lamp area after rotating the M-sided polygon at different angles.

[0371] For example, Figure 15A The angle between side M1 of the M-gon M11 shown and the first direction can be 5 degrees. Figure 15B The angle between side M1 of the M-gon M12 shown and the first direction can be 10 degrees. Figure 15C The angle between side M1 of the M-gon M13 shown and the first direction can be 13 degrees. Figure 15D The angle between side M1 of the M-gon M14 shown and the first direction can be 15 degrees. Figure 15E The angle between side M1 of the M-gon M15 shown and the first direction can be 17 degrees. Figure 15F The angle between side M1 of the M-gon M16 shown and the first direction can be 20 degrees. Figure 15G The angle between side M1 of the M-gon M17 shown and the first direction can be 30 degrees.

[0372] For example, Figure 15A The angle between the diagonal 392 of the second square M11 and the diagonal 391 of the first square can be 5 degrees. Figure 15B The angle between the diagonal 392 of the second square M12 and the diagonal 391 of the first square can be 10 degrees. Figure 15C The angle between the diagonal 392 of the second square M13 and the diagonal 391 of the first square can be 13 degrees. Figure 15DThe angle between the diagonal 392 of the second square M14 and the diagonal 391 of the first square can be 15 degrees. Figure 15E The angle between the diagonal 392 of the second square M15 and the diagonal 391 of the first square can be 17 degrees. Figure 15F The angle between the diagonal 392 of the second square M16 and the diagonal 391 of the first square can be 20 degrees. Figure 15G The angle between the diagonal 392 of the second square M17 and the diagonal 391 of the first square can be 30 degrees.

[0373] Figures 15A to 15G The relative light intensity shown can refer to the value of Q at the edge of the lamp area, where Q = P × (1 / L1 + 1 / L2 + ... + 1 / L) N ).

[0374] In this embodiment of the disclosure, rotating the M-sided polygon by different angles can refer to rotating the M-sided polygon by a certain angle with the center of the M-sided polygon as the center, such as rotating the square by a certain angle with the center of the square as the center.

[0375] The aforementioned rotation can refer to the M-sided polygon rotating clockwise or counterclockwise.

[0376] Figures 15A to 15G The light area shown is Figures 13A to 13G The differences between the shown light zones include the number of light-emitting units included in each zone, such as... Figures 15A to 15G The lamp area 300 shown may include five light-emitting units 310, such as Q = P × (1 / L1 + 1 / L2 + 1 / L3 + 1 / L4 + 1 / L5).

[0377] In some examples, such as Figures 15A to 15G and Figure 16 As shown, each of the at least some light areas 300 includes at least four light-emitting units 310, which are arranged in an M-sided shape. The angle between one of the first direction and the second direction and at least one side of the M-sided shape is 12 to 18 degrees.

[0378] In some examples, such as Figures 15A to 15G and Figure 16 As shown, each of the at least partial light areas 300 is in the shape of a first square. Each of the at least partial light areas 300 includes at least four light-emitting units 310. The centers of the four light-emitting units 310 closest to the four vertices of the light area 300 are connected sequentially to form a second square. The angle between the diagonal of the first square and the diagonal of the second square is 12 to 18 degrees.

[0379] For example, such as Figures 13A to 13G The four light-emitting units 310 shown are arranged in a quadrilateral shape and Figures 15A to 15G The five light-emitting units 310 shown can be arranged in quadrilaterals with the same shape and size, but are not limited to this. At least one of the two parameters, shape and size, can be different.

[0380] In some examples, such as Figures 15A to 15G As shown, at least four light-emitting units 310 include five light-emitting units 310, and the centers of the four light-emitting units 310 located at the outermost edge of the five light-emitting units 310 are connected in sequence to form a second square.

[0381] For example, such as Figures 15A to 15G As shown, each of the at least some light areas 300 includes five light-emitting units 311, 312, 313, 314 and 315, which are arranged in a quadrilateral. The angle between one of the first direction and the second direction and at least one side of the quadrilateral is 12 to 18 degrees.

[0382] For example, such as Figures 15A to 15G As shown, the four light-emitting units 311, 312, 313 and 314 are arranged in a quadrilateral, and the light-emitting unit 315 is located at the center of the four light-emitting units 311, 312, 313 and 314.

[0383] For example, such as Figures 15A to 15G and Figure 16 As shown, the shape of the lamp area 300 is a first square. The centers of the four outermost light-emitting units 310 in the five light-emitting units 310 included in the lamp area 300 are connected sequentially to form a second square. The angle between the diagonals of the first square and the second square can be 5 degrees, 10 degrees, 13 degrees, 15 degrees, 17 degrees, 20 degrees, or 30 degrees. Of course, this embodiment is not limited to the above-mentioned angles between the diagonals of the first and second squares; the angle between the diagonals of the first and second squares can be selected according to product requirements.

[0384] For example, such as Figures 15A to 15GAs shown, the ratio of the pitch of lamp area 300 to the side length of the second square is 1.7 to 2.3. For example, the ratio of the pitch of lamp area 300 to the side length of the second square is 1.65 to 2.25. For example, the ratio of the pitch of lamp area 300 to the side length of the second square is 1.7 to 2.2. For example, the ratio of the pitch of lamp area 300 to the side length of the second square is 1.75 to 2.15. For example, the ratio of the pitch of lamp area 300 to the side length of the second square is 1.8 to 2.1. For example, the ratio of the pitch of lamp area 300 to the side length of the second square is 1.85 to 2.05. For example, the ratio of the pitch of lamp area 300 to the side length of the second square is 1.9 to 2.

[0385] For example, such as Figures 15A to 15G As shown, the light intensity at the edge of the lamp area 300, such as the corner area, satisfies I1=I0×m×h×(1 / L1+1 / L2+…+1 / L N ), where the distance from the center of the i-th light-emitting unit 310 to the apex of the lamp area 300 is L. i The pitch P of the lamp zone 300 and the number N of the light-emitting units 310 satisfy: 8.5 ≥ P × (1 / L1 + 1 / L2 + ... + 1 / L N )≥6.3.

[0386] For example, such as Figures 15A to 15G As shown, Q = P × (1 / L1 + 1 / L2 + 1 / L3 + 1 / L4 + 1 / L5), 8.5 ≥ Q ≥ 6.3.

[0387] For example, such as Figures 15A to 15G As shown, the size of the light-emitting unit 310 can be 0.219mm × 0.219mm.

[0388] For example, such as Figures 15A to 15G and Figure 16As shown, taking a pitch of 4.8 mm for lamp area 300, a pitch of 2.6 mm for light-emitting unit 310, and a side length of 2.6 mm for the M-sided polygon as an example, when the angle between the side M1 of the second square and the first direction (i.e., the angle between the diagonal of the first square and the diagonal of the second square) is 0 degrees, Q = 7.935362; when the angle between the side M1 of the second square and the first direction is 5 degrees, Q = 7.80074; and when the angle between the side M1 of the second square and the first direction is 10 degrees, Q = 7.767317. When the angle between the side M1 of the second square and the first direction is 13 degrees, Q = 7.823319; when the angle is 15 degrees, Q = 8.091537; when the angle is 17 degrees, Q = 7.739908; when the angle is 20 degrees, Q = 7.575887; and when the angle is 30 degrees, Q = 7.531522. Therefore, after rotating the M-sided polygon by different angles, the relative light intensity at the edge of the lamp area first increases and then decreases with increasing angle.

[0389] For example, such as Figure 16 As shown, when the rotation angle of the M-sided polygon, such as the second square, is 12 to 18 degrees, the relative light intensity Q at the edge of the lamp area is relatively large.

[0390] The backlight structure provided in this embodiment adjusts the angle of the M-sided shape formed by the arrangement of light-emitting units in the lamp area to a certain range, such as 12 to 18 degrees, and sets the number of light-emitting units in the lamp area, the pitch of the lamp area, and the side length of the M-sided shape. This helps to improve the light intensity at the edge of the lamp area, thereby improving the uniformity of light output in the lamp area.

[0391] For example, such as Figure 14 and Figure 16 As shown, when the number of light-emitting units 310 in the lamp area 300 is five, the light intensity at the edge position of the lamp area 300, such as the top corner position, is greater than the light intensity at the edge position of the lamp area 300 when the number of light-emitting units 310 in the lamp area 300 is four.

[0392] For example, the angle between the diagonals of the first square and the second square is 13 to 17 degrees. For example, the angle between the diagonals of the first square and the second square is 14.5 to 16.5 degrees. For example, the angle between the diagonals of the first square and the second square is 15 to 16 degrees.

[0393] For example, such as Figures 15A to 15G As shown, the ratio of the light intensity at the edge of the light area 300, such as the top corner area, to the light intensity at the center of the light area 300 is not less than 0.5.

[0394] For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.55. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.6. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.65. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.7. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.75. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.8. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.85. For example, the ratio of the light intensity at the edge of the light area 300 to the light intensity at the center of the light area 300 is not less than 0.9.

[0395] For example, Figures 15A to 15G The dimensions, materials, and other parameters of the retaining wall in the example shown can be the same as the corresponding parameters in the above examples, and will not be repeated here.

[0396] Figures 17A to 17G This is a schematic diagram of a light zone provided according to another example of an embodiment of the present disclosure. Figure 18 To be Figures 17A to 17G The diagram shows the relationship between the relative light intensity at the edge of the lamp area after rotating the M-sided polygon at different angles.

[0397] For example, Figure 17A The angle between side M2 ​​of triangle M21 and the first direction can be 5 degrees. Figure 17B The angle between side M2 ​​of triangle M22 and the first direction can be 10 degrees. Figure 17C The angle between side M2 ​​of triangle M23 and the first direction can be 13 degrees. Figure 17D The angle between side M2 ​​of triangle M24 and the first direction can be 15 degrees. Figure 17E The angle between side M2 ​​of triangle M25 and the first direction can be 17 degrees. Figure 17F The angle between side M2 ​​of triangle M26 and the first direction can be 20 degrees. Figure 17G The angle between side M2 ​​of triangle M27 and the first direction shown can be 30 degrees. However, this embodiment is not limited to the angle between the side of the triangle and the first direction being the above-mentioned value; the angle between the side of the triangle and the first direction can be selected according to product requirements.

[0398] Figures 17A to 17GThe relative light intensity shown can refer to the value of Q at the edge of the lamp area, where Q = P × (1 / L1 + 1 / L2 + ... + 1 / L) N ).

[0399] In this embodiment of the disclosure, rotating the M-sided polygon by different angles can refer to rotating the M-sided polygon by a certain angle with the center of the M-sided polygon as the center, such as rotating the triangle by a certain angle with the center of the triangle as the center.

[0400] The aforementioned rotation can refer to the M-sided polygon rotating clockwise or counterclockwise.

[0401] Figures 17A to 17G The light area shown is Figures 13A to 13G and Figures 15A to 15G The differences in the light areas shown include the different shapes of the M-sided polygons, such as... Figures 17A to 17G The M-sided polygon shown can be a triangle.

[0402] In some examples, such as Figures 17A to 17G As shown, each of the at least some light areas 300 includes three light-emitting units 311, 312 and 313. The centers of the three light-emitting units 311, 312 and 313 are connected in sequence to form a triangle. The angle between one of the first direction and the second direction and one side M2 ​​of the triangle is less than 5 degrees.

[0403] For example, such as Figures 17A to 17G As shown, the ratio of the pitch of lamp zone 300 to the side length of the triangle is 1.7 to 2.3. For example, the ratio of the pitch of lamp zone 300 to the side length of the triangle is 1.65 to 2.25. For example, the ratio of the pitch of lamp zone 300 to the side length of the triangle is 1.7 to 2.2. For example, the ratio of the pitch of lamp zone 300 to the side length of the triangle is 1.75 to 2.15. For example, the ratio of the pitch of lamp zone 300 to the side length of the triangle is 1.8 to 2.1. For example, the ratio of the pitch of lamp zone 300 to the side length of the triangle is 1.85 to 2.05. For example, the ratio of the pitch of lamp zone 300 to the side length of the triangle is 1.9 to 2.

[0404] For example, such as Figures 17A to 17G As shown, the light intensity at the edge of the lamp area 300, such as the corner area, satisfies I1=I0×m×h×(1 / L1+1 / L2+…+1 / L N ), where the distance from the center of the i-th light-emitting unit 310 to the apex of the lamp area 300 is L. i The pitch P of the lamp zone 300 and the number N of the light-emitting units 310 satisfy: 8.5 ≥ P × (1 / L1 + 1 / L2 + ... + 1 / L N )≥6.3.

[0405] For example, such as Figures 17A to 17GAs shown, Q = P × (1 / L1 + 1 / L2 + 1 / L3), 8.5 ≥ Q ≥ 6.3.

[0406] For example, such as Figures 17A to 17G As shown, the size of the light-emitting unit 310 can be 0.219mm × 0.219mm.

[0407] For example, such as Figures 17A to 17G and Figure 18 As shown, taking a pitch of 4.8 mm for lamp area 300, a pitch of 2.6 mm for light-emitting unit 310, and a side length of 2.6 mm for M-gon as an example, when the angle between side M2 ​​of triangle and the first direction is 0 degrees, Q = 3.926995; when the angle between side M2 ​​of triangle and the first direction is 5 degrees, Q = 3.880136; when the angle between side M2 ​​of triangle and the first direction is 10 degrees, Q = 3.840027; when the angle between side M2 ​​of triangle and the first direction is 10 degrees, Q = 3.840027; when the angle between side M2 ​​of triangle and the first direction is 2.6 mm, Q = 3.926995 ... When the angle between the two directions is 13 degrees, Q = 3.82151; when the angle between side M2 ​​of the triangle and the first direction is 15 degrees, Q = 3.811524; when the angle between side M2 ​​of the triangle and the first direction is 17 degrees, Q = 3.803458; when the angle between side M2 ​​of the triangle and the first direction is 20 degrees, Q = 3.794941; and when the angle between side M2 ​​of the triangle and the first direction is 30 degrees, Q = 3.797286. Therefore, after rotating the M-sided triangle by different angles, the relative light intensity at the edge of the lamp area gradually decreases as the angle increases.

[0408] By setting the angle between one of the first and second directions and one side M2 ​​of the triangle to a smaller value, it is beneficial to increase the light intensity at the edge of the lamp area, thereby improving the uniformity of light output in the lamp area.

[0409] For example, such as Figures 17A to 17G As shown, the angle between the first or second direction and one side M2 ​​of the triangle is less than 4.5 degrees. For example, the angle between the first or second direction and one side M2 ​​of the triangle is less than 4 degrees. For example, the angle between the first or second direction and one side M2 ​​of the triangle is less than 3.5 degrees. For example, the angle between the first or second direction and one side M2 ​​of the triangle is less than 3 degrees. For example, the angle between the first or second direction and one side M2 ​​of the triangle is less than 2.5 degrees. For example, the angle between the first or second direction and one side M2 ​​of the triangle is less than 2 degrees. For example, the angle between the first or second direction and one side M2 ​​of the triangle is less than 1.5 degrees. For example, the angle between the first or second direction and one side M2 ​​of the triangle is less than 1 degree. For example, the angle between the first or second direction and one side M2 ​​of the triangle is less than 0.5 degrees.

[0410] For example, such as Figures 17A to 17GAs shown, the ratio of the light intensity at the edge of the light area 300, such as the top corner area, to the light intensity at the center of the light area 300 is not less than 0.5.

[0411] For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.55. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.6. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.65. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.7. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.75. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.8. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.85. For example, the ratio of the light intensity at the edge of the light area 300 to the light intensity at the center of the light area 300 is not less than 0.9.

[0412] For example, Figures 17A to 17G The dimensions, materials, and other parameters of the retaining wall in the example shown can be the same as the corresponding parameters in the above examples, and will not be repeated here.

[0413] Figure 19 This is a schematic diagram showing the distribution of light-emitting units in a lamp area in different examples of embodiments of the present disclosure.

[0414] For example, Figure 19 In the example shown, at least one light area 300 includes nine light-emitting units 311, 312, 313, 314, 315, 316, 317, 318, and 319. The centers of four light-emitting units 311, 312, 313, and 314 are connected sequentially to form a quadrilateral, or the nine light-emitting units 311, 312, 313, 314, 315, 316, 317, 318, and 319 are arranged in a quadrilateral. The angle between at least one of the first direction and the second direction and at least one side of the quadrilateral is greater than 0 degrees.

[0415] The four light-emitting units 311, 312, 313 and 314 mentioned above can be the four outermost light-emitting units or the four light-emitting units closest to the top corner of the lamp area.

[0416] For example, such as Figure 19As shown, the angles between the first and second directions and each side of the M-sided polygon are all greater than 0.5 degrees. For example, the angles between the first and second directions and each side of the M-sided polygon are all greater than 1 degree. For example, the angles between the first and second directions and each side of the M-sided polygon are all greater than 2 degrees. For example, the angles between the first and second directions and each side of the M-sided polygon are all greater than 3 degrees. For example, the angles between the first and second directions and each side of the M-sided polygon are all greater than 4 degrees. For example, the angles between the first and second directions and each side of the M-sided polygon are all greater than 5 degrees. For example, the angles between the first and second directions and each side of the M-sided polygon are all greater than 5.5 degrees. For example, the angles between the first and second directions and each side of the M-sided polygon are all greater than 6 degrees. For example, the angles between the first and second directions and each side of the M-sided polygon are all greater than 6.5 degrees. For example, the angles between the first and second directions and each side of the M-sided polygon are all greater than 7 degrees. For example, the angles between the first and second directions and each side of the M-sided polygon are all greater than 8 degrees. For example, the angles between the first and second directions and each side of the M-gon are all greater than 9 degrees. For example, the angles between the first and second directions and each side of the M-gon are all greater than 10 degrees. For example, the angles between the first and second directions and each side of the M-gon are all greater than 10.5 degrees. For example, the angles between the first and second directions and each side of the M-gon are all greater than 11 degrees. For example, the angles between the first and second directions and each side of the M-gon are all greater than 12 degrees.

[0417] For example, such as Figure 19 As shown, the angle between side M1 of the M-sided polygon and the first direction is 12 to 18 degrees. For example, the angle between side M1 of the M-sided polygon and the first direction is 12.5 to 17.5 degrees. For example, the angle between side M1 of the M-sided polygon and the first direction is 13 to 17 degrees. For example, the angle between side M1 of the M-sided polygon and the first direction is 13.5 to 16.5 degrees. For example, the angle between side M1 of the M-sided polygon and the first direction is 14 to 16 degrees. For example, the angle between side M1 of the M-sided polygon and the first direction is 14.5 to 15 degrees.

[0418] For example, such as Figure 19 As shown, the light area 300 includes 9 light-emitting units, and the distance from the center of the i-th light-emitting unit 310 to the apex corner of the light area 300 is L. i The value of i ranges from 1 to 9, and L i P and N satisfy: 8.5≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≥6.3.

[0419] For example, 8.3≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≥6.5.

[0420] For example, 8.1≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≥6.6.

[0421] For example, 8.2≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≥6.7.

[0422] For example, 8≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≥6.

[0423] For example, 7.9 ≥ P × (1 / L1 + 1 / L2 + 1 / L3 + 1 / L4 + 1 / L5 + 1 / L6 + 1 / L7 + 1 / L8 + 1 / L9) ≥ 6.9.

[0424] For example, 7.8≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≥7.

[0425] For example, 7.7≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≥6.8.

[0426] For example, 7.5≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≥7.1.

[0427] For example, 7.6≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≥7.2.

[0428] For example, 7.4≥P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≥7.3.

[0429] For example, such as Figure 19As shown, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.7 to 2.3. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.65 to 2.25. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.7 to 2.2. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.75 to 2.15. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.8 to 2.1. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.85 to 2.05. For example, the ratio of the pitch of the lamp area 300 to the side length of the quadrilateral is 1.9 to 2.

[0430] For example, such as Figure 19 As shown, the nine light-emitting units 311, 312, 313, 314, 315, 316, 317, 318 and 319 can be evenly distributed.

[0431] For example, the light-emitting unit 315 can be located at the center of the quadrilateral formed by the four light-emitting units 311, 312, 313 and 314.

[0432] For example, such as Figure 19 As shown, light-emitting unit 318 can be located between light-emitting unit 311 and light-emitting unit 314, light-emitting unit 319 can be located between light-emitting unit 313 and light-emitting unit 314, light-emitting unit 317 can be located between light-emitting unit 313 and light-emitting unit 312, and light-emitting unit 316 can be located between light-emitting unit 312 and light-emitting unit 311.

[0433] For example, the four sides of the quadrilateral pass through the centers of light-emitting units 318, 319, 317 and 316 respectively.

[0434] For example, the centers of light-emitting units 318, 319, 317 and 316 can be the centers of the four sides of a quadrilateral, respectively.

[0435] For example, such as Figure 19 As shown, the quadrilateral formed by connecting the centers of the four light-emitting units 311, 312, 313 and 314 in sequence can be a rectangle.

[0436] For example, the quadrilateral formed by connecting the centers of the four light-emitting units 311, 312, 313 and 314 in sequence can be a square.

[0437] For example, the angle between two sides of a quadrilateral and the first direction is greater than 0 degrees, and the angle between the other two sides of the quadrilateral and the second direction is greater than 0 degrees.

[0438] For example, such as Figure 7As shown, the shape of the light area 300 is a first square, and the quadrilateral formed by connecting the centers of the four light-emitting units 311, 312, 313 and 314 in sequence can be a second square. The angle between the diagonal of the first square and the diagonal of the second square is greater than 0 degrees.

[0439] For example, such as Figure 19 As shown, the ratio of the light intensity at the edge of the light area 300, such as the top corner area, to the light intensity at the center of the light area 300 is not less than 0.5.

[0440] For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.55. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.6. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.65. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.7. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.75. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.8. For example, the ratio of the light intensity at the edge of the lighting area 300 to the light intensity at the center of the lighting area 300 is not less than 0.85. For example, the ratio of the light intensity at the edge of the light area 300 to the light intensity at the center of the light area 300 is not less than 0.9.

[0441] For example, Figure 19 The dimensions, materials, and light-emitting unit dimensions of the retaining wall in the example shown can be the same as the corresponding parameters in the above examples, and will not be repeated here.

[0442] This disclosure is not limited to the shape of the lighting area as shown in the example. Figures 1 to 19 The shape of the rectangle shown, such as the light area, can be designed according to the requirements of the display panel corresponding to the backlight structure. For example, the shape of the light area can also be hexagonal or octagonal.

[0443] This disclosure is not limited to the number of light-emitting units in the lamp area. Figures 1 to 19 The numbers shown (three, four, five, seven, nine) can be adjusted according to the position and size of the light-emitting units. For example, the number of light-emitting units in a light area can also be six, eight, ten, eleven, twelve, etc.

[0444] The backlight structure provided in this embodiment of the present disclosure, by coordinating the number of light-emitting units in the lamp area, the side length of the M-sided polygon, the pitch of the lamp area, and the angle between the side of the M-sided polygon and the first or second direction, is beneficial to improve the light intensity at the edge of the lamp area, thereby improving the light output uniformity of the lamp area.

[0445] Figure 20 Another example of an embodiment of this disclosure is provided along Figure 1 A schematic diagram of a partial cross-section intercepted by line AA'. Figure 21 Another example of an embodiment of this disclosure is provided along Figure 10 A schematic diagram of a partial cross-section intercepted by line BB'.

[0446] In some examples, such as Figure 20 and Figure 21 As shown, the backlight structure also includes a flat adhesive 400, located between the baffle 220 and the light-emitting unit 310, and between two adjacent light-emitting units 310. The thickness of the flat adhesive 400 is not less than the height of the light-emitting unit 310 and less than the thickness of the baffle 220. The orthographic projection of the surface of the flat adhesive 400 near the substrate 100 on the substrate 100 is completely within the orthographic projection of the surface of the flat adhesive 400 away from the substrate 100 on the substrate 100.

[0447] For example, such as Figure 20 and Figure 21 As shown, the flat adhesive 400 can fill at least a portion of the gap between the retaining wall 220 and the light-emitting unit 310, as well as at least a portion of the gap between adjacent light-emitting units 310.

[0448] For example, such as Figure 20 and Figure 21 As shown, the thickness of the flat adhesive 400 can be greater than or equal to the height of the light-emitting unit 310.

[0449] For example, such as Figure 20 and Figure 21 As shown, flat adhesive 400 can be made with white oil. For example, the thickness of flat adhesive 400 can be 50 micrometers. For example, the thickness of flat adhesive 400 can be greater than 90 micrometers. For example, the thickness of flat adhesive 400 can be less than 250 micrometers. For example, the thickness of flat adhesive 400 can be less than 200 micrometers. For example, the thickness of flat adhesive 400 can be less than 180 micrometers. For example, the thickness of flat adhesive 400 can be less than 150 micrometers. For example, the thickness of flat adhesive 400 can be less than 120 micrometers. For example, the thickness of flat adhesive 400 can be less than 100 micrometers.

[0450] In some examples, such as Figure 20 and Figure 21As shown, the cross-sectional shape of the flat adhesive 400 cut by the plane (such as the XZ plane) where the center line connecting two adjacent light-emitting units 310 is located includes a trapezoid. The length of the first base 410 of the trapezoid away from the substrate 100 is greater than the length of the second base 420 of the trapezoid close to the substrate 100. The distance between the closest endpoints of the orthographic projections of the first base 410 and the second base 420 on the substrate 100 is 17 to 32 micrometers. The plane where the center line connecting the two adjacent light-emitting units 310 is located is perpendicular to the substrate 100.

[0451] For example, such as Figure 20 and Figure 21 As shown, the line connecting the centers of the first bottom edge 410 and the second bottom edge 420 is perpendicular to the substrate 100. For example, the length difference between the first bottom edge 410 and the second bottom edge 420 on the side of the trapezoid perpendicular to the center line of the substrate 100 can be 17 to 32 micrometers.

[0452] For example, the thickness difference of the flat adhesive 400 at different locations can be less than 10% of the thickness at the location where the flat adhesive 400 has the greatest thickness. For example, the thickness difference of the flat adhesive 400 at different locations can be less than 8% of the thickness at the location where the flat adhesive 400 has the greatest thickness.

[0453] For example, the thickness of the flat adhesive 400 is 49.79 micrometers, and the length difference between the first bottom edge 410 and the second bottom edge 420 on one side of the trapezoid perpendicular to the center line of the substrate 100 can be 28.93 micrometers, and the length difference between the first bottom edge 410 and the second bottom edge 420 on the other side of the trapezoid perpendicular to the center line of the substrate 100 can be 30.9 micrometers.

[0454] For example, the thickness of the flat adhesive 400 is 47.29 micrometers, and the length difference between the first bottom edge 410 and the second bottom edge 420 on one side of the trapezoid perpendicular to the center line of the substrate 100 can be 26.3 micrometers, and the length difference between the first bottom edge 410 and the second bottom edge 420 on the other side of the trapezoid perpendicular to the center line of the substrate 100 can be 29.59 micrometers.

[0455] For example, the thickness of the flat adhesive 400 is 51.28 micrometers, and the length difference between the first bottom edge 410 and the second bottom edge 420 on one side of the trapezoid perpendicular to the center line of the substrate 100 can be 18.41 micrometers, and the length difference between the first bottom edge 410 and the second bottom edge 420 on the other side of the trapezoid perpendicular to the center line of the substrate 100 can be 26.96 micrometers.

[0456] For example, the thickness of the flat adhesive 400 is 51.94 micrometers, and the length difference between the first bottom edge 410 and the second bottom edge 420 on one side of the trapezoid perpendicular to the center line of the substrate 100 can be 26.3 micrometers, and the length difference between the first bottom edge 410 and the second bottom edge 420 on the other side of the trapezoid perpendicular to the center line of the substrate 100 can be 27.61 micrometers.

[0457] In the backlight structure disclosed herein, by setting the cross-section of the flat adhesive to a trapezoidal shape, such as forming an undercut structure, it is possible to prevent the flat adhesive from eroding the pads electrically connected to the light-emitting unit after thermal expansion (e.g., ...). Figure 2A The pad 321 shown can also prevent the light emitted by the light-emitting unit from changing its light emission characteristics due to different refractive indices after passing through the flat adhesive.

[0458] Figure 22 Another example of an embodiment of this disclosure is provided along Figure 10 A schematic diagram of the local cross-section structure intercepted by line BB'.

[0459] In some examples, such as Figure 22 As shown, a thermally conductive adhesive 500 is provided on the side of the substrate 100 away from the light-emitting unit 310, and at least one opening 501 is provided in the thermally conductive adhesive 500.

[0460] For example, such as Figure 22 As shown, a black thermally conductive adhesive with a thickness of less than 1 micrometer is attached to the entire surface of the substrate 100 away from the light-emitting unit 310 to achieve a heat dissipation effect.

[0461] For example, such as Figure 22 As shown, the aperture of the opening 502 can be 1.5 mm. For example, the number of openings 502 can be greater than 100, such as 29*18. By setting openings in the thermally conductive adhesive, it is beneficial to provide venting when applying the thermally conductive adhesive to the substrate and to prevent wrinkles in the thermally conductive adhesive.

[0462] For example, a grounding wire, such as a copper wire, can be provided on the side of the substrate 100 away from the light-emitting unit 310. For example, the length of the copper wire can be 0.45 mm.

[0463] For example, a flat adhesive with a thickness of 0.3 micrometers can be provided on the side of the substrate 100 facing the light-emitting unit 310. For example, a white dam adhesive can be provided around each lamp area. For example, the width of the white dam adhesive can be 0.5 mm and the height can be 0.25 mm, so as to improve the brightness and reduce the halo effect.

[0464] Figure 23 For including Figure 11 A partial cross-sectional schematic diagram of the backlight structure of the substrate, barrier, and light-emitting unit shown.

[0465] In some examples, such as Figure 23 As shown, the backlight structure also includes a light diffusion structure 610, located on the side of the light-emitting unit 310 away from the substrate 100. The light diffusion structure 610 includes at least one diffusion film, such as three diffusion films 611, 612 and 613, each diffusion film having a thickness of 0.05 to 0.2 mm.

[0466] For example, different diffusion films can have the same or different thicknesses.

[0467] For example, such as Figure 23 As shown, the thickness of diffusion film 611 is 0.12 mm, the thickness of diffusion film 612 is 0.13 mm, and the thickness of diffusion film 613 is 0.13 mm. For example, the thickness of diffusion film 611 is 0.085 mm, the thickness of diffusion film 612 is 0.19 mm, and the thickness of diffusion film 613 is 0.14 mm. For example, the thickness of the three diffusion films 611, 612, and 613 can all be 0.19 mm. For example, the weight of the diffusion films can be 14.7 grams. For example, the weight of diffusion film 611 is 10.25 grams, the weight of diffusion film 612 is 14.31 grams, and the weight of diffusion film 613 is 20.5 grams.

[0468] In some examples, such as Figure 23 As shown, the backlight structure also includes a color conversion structure 620 located on the side of the light diffusion structure 610 away from the light-emitting unit 310. The color conversion structure 620 includes a color conversion film 622 configured to convert a first color light into a second color light, the first color light including blue light, and the second color light including at least one of red and green light. For example, the color conversion film converts blue light into red light. For example, the color conversion film converts blue light into green light.

[0469] In some examples, such as Figure 23 As shown, the color conversion structure 620 also includes a prism 623 located on the side of the color conversion film 622 away from the light-emitting unit 310.

[0470] For example, the total thickness of prism 623 can be 0.2 mm. Prism 623 includes multiple sub-prisms, each of which can have a length of 39 micrometers, a width of 39 micrometers, and a height of 17 micrometers.

[0471] For example, the ratio of the pitch of the sub-prism to the pitch of the light-emitting unit is greater than 100 and less than 150.

[0472] For example, such as Figure 23 As shown, the color conversion structure 620 also includes a phosphor composite film 621, located on the side of the color conversion film 622 close to the substrate 100.

[0473] For example, such as Figure 23As shown, the thickness of the color conversion structure 620 can be 0.2 to 0.4 mm. For example, the thickness of the color conversion structure 620 can be 0.21 mm. For example, the thickness of the color conversion structure 620 can be 0.27 mm. For example, the thickness of the color conversion structure 620 can be 0.308 mm. For example, the thickness of the color conversion structure 620 can be 27 grams. For example, the thickness of the color conversion structure 620 can be 30.78 grams.

[0474] In some examples, such as Figure 23 As shown, the backlight structure also includes a prism structure 630 located on the side of the color conversion structure 620 away from the light-emitting unit 310. The prism structure 630 includes at least one prism layer with a thickness of 0.05 to 0.2 mm.

[0475] For example, such as Figure 23 As shown, the prism structure 630 includes a prism layer 631 and a prism layer 632. For example, the thicknesses of prism layer 631 and prism layer 632 can be the same or different.

[0476] For example, such as Figure 23 As shown, the thickness of prism layer 631 can be 0.1 mm, and the thickness of prism layer 632 can be 0.11 mm. For example, the thickness of prism layer 631 can be 0.09 mm, and the thickness of prism layer 632 can be 0.24 mm.

[0477] For example, the prism structure 630 may also consist of only one prism layer, which may have a thickness of 0.16 mm.

[0478] For example, the backlight structure may also include a diffuser plate (not shown) located on the side of the prism structure 630 away from the substrate 100.

[0479] Figure 24 This is a partial cross-sectional structural diagram of a display device according to another embodiment of the present disclosure. Figure 24 As shown, the display device includes a display panel 1000 and a backlight structure 2000, with the display panel 1000 located on the light-emitting side of the backlight structure 2000.

[0480] The backlight structure in the display device provided in this disclosure can be any of the backlight structures provided in the above embodiments. By coordinating the number of light-emitting units in the lamp area of ​​the backlight structure, the side length of the M-sided polygon, the pitch of the lamp area, and the angle between the side of the M-sided polygon and the first or second direction, it is beneficial to improve the light intensity at the edge of the lamp area, thereby improving the light output uniformity of the lamp area.

[0481] For example, such as Figure 24As shown, the backlight structure 2000 also includes a diffuser plate 650 located on the side of the prism structure 630 away from the substrate 100. For example, the thickness of the diffuser plate 650 can be 0.24 mm. For example, the weight of the diffuser plate 650 can be 15.2 grams.

[0482] For example, such as Figure 24 As shown, the display panel 1000 is a liquid crystal display panel. The liquid crystal display panel may include an array substrate 1003, an opposing substrate 1002, and a liquid crystal layer (not shown) located between the array substrate 1003 and the opposing substrate 1002.

[0483] For example, the side of the array substrate 1003 facing the opposing substrate 1002 may include multiple gate lines extending in one direction and multiple data lines extending in another direction. The multiple gate lines and multiple data lines are intersected to define multiple pixel units arranged in an array, and the multiple pixel units can be arranged into a pixel array. Each pixel unit may include a pixel electrode and a thin-film transistor. The gate line is connected to the gate of the thin-film transistor to control the opening or closing of the thin-film transistor. The pixel electrode is connected to one of the source and drain terminals of the thin-film transistor, and the data line is connected to the other of the source and drain terminals of the thin-film transistor. The data line inputs the voltage signal required for displaying the image to the pixel electrode through the thin-film transistor to realize the display of the array substrate.

[0484] For example, the opposing substrate 1002 can be a color filter substrate. The side of the color filter substrate facing the array substrate 1003 can be provided with a color filter layer corresponding to the pixel unit and a black matrix covering structures located in the non-display area, such as gate lines and data lines. For example, the side of the color filter substrate facing the array substrate 1003 can also be provided with a common electrode opposite to the pixel electrode. The common electrode is configured to apply a common voltage to generate an electric field with the pixel electrode that drives the liquid crystal molecules in the liquid crystal layer to deflect. By deflecting, the liquid crystal molecules change the transmittance of the liquid crystal layer, thereby achieving the display of the desired grayscale image.

[0485] For example, such as Figure 24 As shown, the display panel 1000 may further include a first polarizer 1004 disposed on the side of the array substrate 1003 away from the opposing substrate 1002 and a second polarizer 1001 disposed on the side of the opposing substrate 1002 away from the array substrate 1003. The first polarizer 1004 includes a transmission axis extending along the DI1 direction and polarizes the backlight incident therein along the DI1 direction. The second polarizer 1001 includes a transmission axis extending along the DI2 direction and polarizes the light incident on the second polarizer along the DI2 direction. For example, the transmission axes of the first polarizer 1004 and the second polarizer 1001 are perpendicular to each other.

[0486] For example, such as Figure 24As shown, the display device also includes a frame 3002, which supports the display panel 1000.

[0487] For example, such as Figure 24 As shown, the display device also includes a support frame 3001, which comprises an integrated structure of an outer frame and a back frame. The support frame is used to support the plastic frame 3002 and the backlight structure 2000.

[0488] For example, such as Figure 24 As shown, the display device also includes a fixing adhesive 640 located on the side of the thermally conductive adhesive 500 away from the lamp plate 123, which includes the substrate, light-emitting unit, and barrier pattern, etc. The fixing adhesive 640 is used to fix the backlight structure 2000 to the support frame 3001.

[0489] For example, such as Figure 24 As shown, the thickness of the second polarizer 1001 can be 0.28 mm. For example, the thickness of the opposing substrate 1002 can be 0.25 mm. For example, the thickness of the array substrate 1003 can be 0.25 mm. For example, the thickness of the first polarizer 1004 can be 0.11 mm. For example, the total weight of the second polarizer 1001, the opposing substrate 1002, the array substrate 1003, and the first polarizer 1004 can be 159.3 grams.

[0490] For example, such as Figure 24 As shown, the thickness of the second polarizer 1001 can be 0.122 mm. For example, the thickness of the opposing substrate 1002 can be 0.2 mm. For example, the thickness of the array substrate 1003 can be 0.2 mm. For example, the thickness of the first polarizer 1004 can be 0.087 mm. For example, the total weight of the second polarizer 1001, the opposing substrate 1002, the array substrate 1003, and the first polarizer 1004 can be 105.47 grams.

[0491] For example, such as Figure 24 As shown, the thickness of the lamp board 123 can be 0.27 mm. A lamp board protective adhesive is also provided between the lamp board 123 and the thermal conductive adhesive 500. For example, the thickness of the lamp board protective adhesive can be 0.31 mm, and the thickness of the thermal conductive adhesive 500 can be 0.09 mm. The total weight of the lamp board, the lamp board protective adhesive and the thermal conductive adhesive can be 76.6 grams.

[0492] For example, such as Figure 24 As shown, the thickness of the lamp board 123 can be 0.25 mm. The side of the lamp board 123 away from the light diffusion structure 610 can be provided with only lamp board protective adhesive and no longer provided with thermal conductive adhesive. For example, the thickness of the lamp board protective adhesive can be 0.1 mm. The total weight of the lamp board and the lamp board protective adhesive can be 41.41 grams.

[0493] For example, such as Figure 24As shown, when thermally conductive adhesive 500 is used, the thickness of the fixing adhesive 640 can be 0.03 mm. For example, when thermally conductive adhesive 500 is not used, the thickness of the fixing adhesive 640 can be 0.1 mm.

[0494] The following points need to be explained:

[0495] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure, and other structures can be referred to the general design.

[0496] (2) Where there is no conflict, features of the same embodiment and different embodiments of this disclosure may be combined with each other.

[0497] The above description is merely an exemplary embodiment of this disclosure and is not intended to limit the scope of protection of this disclosure, which is determined by the appended claims.

Claims

1. A backlight structure, comprising: a substrate; a barrier pattern on the substrate, comprising a plurality of openings arranged in a first direction and a second direction and a barrier wall surrounding each opening, the plurality of openings being configured to define a plurality of lamp regions, the first direction and the second direction intersecting; a plurality of light emitting units on the substrate and distributed in the plurality of lamp regions, wherein the substrate comprises a middle region and an edge region surrounding the middle region, at least three light emitting units are arranged in each lamp region in the middle region, centers of the three light emitting units sequentially connected form a triangle, a distance between a center of the triangle and a center of the lamp region is less than 10% of a pitch of the lamp region, and an included angle between one of the first direction and the second direction and a side of the triangle is less than 5 degrees; The pitch of the light area is P, and the distance from the center of the i-th light emitting unit to the top angle of the light area is L i , i is in the range of 1 to 3, and L i and P satisfy: 8.5≥P×(1 / L1+1 / L2+1 / L3)≥6.3; The light emitting intensity distribution I of the light emitting unit satisfies: I=I0cosmα, I0 is the light emitting intensity distribution perpendicular to the normal direction of the light emitting surface of the light emitting unit, α is the included angle between the light emitting direction of the light emitting unit and the normal, m=(-ln2) / (lncosα 1 / 2 ), α 1 / 2 is the included angle between the light emitting direction and the normal when the light emitting intensity is reduced to half of the light emitting intensity corresponding to the normal direction, and the optical path of the light emitted by the light emitting unit in the normal direction is h; The distance from the center of the i-th light emitting unit to the top angle of the lamp region is L i , i is in the range of 1 to 3, L i and h satisfy: 0.5 ≥ {cosm × [(π / 2) - (h / L1)] + cosm × [(π / 2) - (h / L2)] + cosm × [(π / 2) - (h / L3)]} ≥ 0.

23.

2. The backlight structure of claim 1, wherein, a ratio of different side lengths of the triangle is 0.9-1.1, and a ratio of the pitch of the lamp region and the side length of the triangle is 1.7-2.

3.

3. The backlight structure of claim 2, wherein, a ratio of a light intensity at an edge position of the lamp region and a light intensity at a center position of the lamp region is not less than 0.

5.

4. The backlight structure of claim 1, wherein, The light emitting units arranged in each lamp region are electrically connected, and the barrier wall comprises a light shielding material.

5. The backlight structure of claim 1, wherein, The light emitting unit comprises a light emitting diode chip and a packaging structure configured to package the light emitting diode chip, and a gap is arranged between packaging structures of adjacent light emitting units.

6. The backlight structure of claim 5, wherein, A maximum dimension of the light emitting unit in a direction parallel to the substrate is not greater than 500 microns.

7. The backlight structure of claim 1, wherein, In a direction perpendicular to the substrate, a thickness of the barrier wall is greater than a height of the light emitting unit.

8. The backlight structure of claim 7, wherein, The thickness of the barrier wall is 200-400 microns, and the height of the light emitting unit is 50-100 microns.

9. The backlight structure of claim 7, wherein, The thickness of the barrier wall is 250-270 microns, a width of the barrier wall is 350-500 microns, and the height of the light emitting unit is 80-100 microns. 10.The backlight structure of claim 7, further comprising: a flat glue between the barrier wall and the light emitting unit and between two adjacent light emitting units, wherein a thickness of the flat glue is not less than the height of the light emitting unit and is less than the thickness of the barrier wall, and a projection of a surface of the flat glue close to the substrate on the substrate is completely within a projection of a surface of the flat glue away from the substrate on the substrate.

11. The backlight structure of claim 10, wherein, A cross-sectional shape of the flat glue cut by a plane in which centers of the two adjacent light emitting units are connected comprises a trapezoid, a length of a first bottom side of the trapezoid away from the substrate is greater than a length of a second bottom side of the trapezoid close to the substrate, and a distance between end points of the first bottom side and the second bottom side close to each other in the projection on the substrate is 17-32 microns, and the plane is perpendicular to the substrate.

12. The backlight structure of any of claims 1-11, wherein, A heat-conducting glue is arranged on a side of the substrate away from the light emitting unit, and at least one opening is arranged in the heat-conducting glue. 13.The backlight structure of any one of claims 1-11, further comprising: a light diffusion structure on a side of the light emitting unit away from the substrate, wherein the light diffusion structure comprises at least one diffusion film, and a thickness of the diffusion film is 0.05-0.2 millimeters. 14.The backlight structure of claim 13, further comprising: a color conversion structure located on a side of the light diffusion structure away from the light emitting unit, wherein the color conversion structure comprises a color conversion film configured to convert first color light to second color light, the first color light comprising blue light, the second color light comprising at least one of red light and green light.

15. The backlight structure of claim 14, wherein, the color conversion structure further comprises a prism located on a side of the color conversion film away from the light emitting unit. 16.The backlight structure of claim 14, further comprising: a prism structure located on a side of the color conversion structure away from the light emitting unit, wherein the prism structure comprises at least one prism layer, the prism layer having a thickness of 0.05-0.2 millimeters. 17.A display device, comprising: a display panel, and the backlight structure of any one of claims 1-16, wherein the display panel is located on a light emitting side of the backlight structure.

Images