Backlight structure and display device

Abstract

The present invention provides a backlight structure and a display device, the backlight structure comprising a substrate (100), a shielding wall pattern (200), and a plurality of light-emitting units (310). The shielding wall pattern (200) includes a plurality of apertures (210) arranged in an array along a first direction and a second direction, and a shielding wall (220) surrounding each aperture (210). The plurality of apertures (210) are configured to define a plurality of light areas (300), and the plurality of light-emitting units (310) are arranged in the plurality of light areas (300). The substrate (100) includes a middle region and an edge region surrounding the middle region, and at least three light-emitting units (310) are installed in each light region (300) located at least in the middle region, and the centers of M light-emitting units (310) of the at least three light-emitting units (310) that are closest to the apex angle of the light region (300) are sequentially connected to form an M-shaped polygon, the distance between the center of the M-shaped polygon and the center of the light region (300) is less than 10% of the pitch of the light region (300), and the included angles formed by the first and second directions and each side of the M-shaped polygon are all greater than 0 degrees. The backlight structure according to the present disclosure contributes to improving the light output uniformity of the light region by setting the included angles formed by the sides of the M-shaped polygon and the first and second directions.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This disclosure claims priority to Chinese Patent Application No. 202211146615.6, filed on September 21, 2022, the entire contents of which are incorporated herein by reference.

[0002] SUMMARY OF THE DISCLOSURE Embodiments of the present disclosure relate to backlight structures and display devices. [Background technology]

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

[0004] Mini light emitting diodes (Mini LEDs) can be used as backlights for thin film transistor liquid crystal display devices. When Mini LEDs are combined with a conventional LCD panel as a backlight, controlling the brightness of the Mini LEDs in conjunction with the gray scale displayed by the display panel allows the LCD display device to have high contrast comparable to that of an OLED display device. Summary of the Invention [Problem to be solved by the invention]

[0005] Embodiments of the present disclosure provide a backlight structure and a display device. [Means for solving the problem]

[0006] An embodiment of the present disclosure provides a backlight structure, comprising: a substrate; a shielding wall pattern and a plurality of light-emitting units disposed on the substrate. The shielding wall pattern includes a plurality of apertures arranged in an array along a first direction and a second direction, and a shielding wall surrounding each aperture, the plurality of apertures being configured to define a plurality of light areas, the first direction intersecting the second direction, and a plurality of light-emitting units being disposed in the plurality of light areas. The substrate includes a middle region and an edge region surrounding the middle region, at least three light-emitting units are disposed in each light area located in the middle region, and the centers of M light-emitting units closest to an apex angle of the light area among the at least three light-emitting units are sequentially connected to form an M-polygon, the distance between the center of the M-polygon and the center of the light area is less than 10% of the pitch of the light area, and the included angles formed by the first direction and the second direction and each side of the M-polygon are all greater than 0 degrees.

[0007] For example, according to an embodiment of the present disclosure, the ratio of the different side lengths of the M-gon is 0.9 to 1.1, and the ratio of the pitch of the write area to the side length of the M-gon is 1.7 to 2.3.

[0008] For example, according to an embodiment of the present disclosure, the pitch of the light area is P, and each light area of ​​the at least some light areas includes N light-emitting units, where N≧M, and the distance from the center of the i-th light-emitting unit to the apex angle of the light area is L i where i ranges from 1 to N, and L i , P and N are 8.5 ≧ P × (1 / L1 + 1 / L2 + … + 1 / L N ) ≥ 6.3.

[0009] For example, according to an embodiment of the present disclosure, the light emitting unit has a light intensity distribution I that satisfies I=I0cosmα, where 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, and m=(-ln2) / (lncosα 1 / 2 ), and α 1 / 2is the angle formed by 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, the optical path of the light emitted from the light emitting unit in the normal direction is h, each light area of ​​the at least some light areas includes N light emitting units, N≧M, and the distance from the center of the i-th light emitting unit to the apex angle of the light area is L i where i ranges from 1 to N, and L i , h and N are 0.5≧{cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )]} ≥ 0.23 is satisfied.

[0010] For example, according to an embodiment of the present disclosure, the ratio of the light intensity at the edge position of the light area to the light intensity at the center position of the light area is 0.5 or more.

[0011] For example, according to an embodiment of the present disclosure, each light area of ​​the at least some light areas includes at least four light-emitting units, the at least four light-emitting units are arranged in the M-shaped polygon, and the included angle formed between one of the first direction and the second direction and at least one side of the M-shaped polygon is 12 to 18 degrees.

[0012] For example, according to an embodiment of the present disclosure, the shape of each light area of ​​at least a portion of the light areas is a first square, each light area of ​​the at least a portion of the light areas includes at least four light-emitting units, the M-shaped polygon is a second square, and the included angle between the diagonal of the first square and the diagonal of the second square is 12 to 18 degrees.

[0013] For example, according to an embodiment of the present disclosure, the shape of at least some of the light areas includes a rectangle, and two adjacent sides of the rectangle extend along the first direction and the second direction, respectively.

[0014] For example, according to an embodiment of the present disclosure, the light-emitting units installed in each light region are electrically connected, and the shielding wall includes a light-shielding material.

[0015] For example, according to an embodiment of the present disclosure, the light emitting unit includes a light emitting diode chip and a packaging structure configured to package the light emitting diode chip, and a gap is provided between the packaging structures of adjacent light emitting units.

[0016] For example, according to an embodiment of the present disclosure, the light emitting unit has a maximum dimension parallel to the substrate of 500 micrometers or less.

[0017] For example, according to an embodiment of the present disclosure, the at least four light-emitting units include four light-emitting units, and the centers of the four light-emitting units are sequentially connected to form the second square.

[0018] For example, according to an embodiment of the present disclosure, the at least four light-emitting units include five light-emitting units, and the centers of the four light-emitting units located at the outermost edges of the five light-emitting units are sequentially connected to form the second square.

[0019] For example, according to an embodiment of the present disclosure, each light area of ​​the at least some light areas includes three light-emitting units, and the centers of the three light-emitting units are sequentially connected to form a triangle, and an included angle between one of the first direction and the second direction and one side of the triangle is less than 5 degrees.

[0020] For example, according to an embodiment of the present disclosure, the thickness of the shielding wall is greater than the height of the light-emitting unit in a direction perpendicular to the substrate.

[0021] For example, according to an embodiment of the present disclosure, the thickness of the shielding wall is 200 to 400 micrometers, and the height of the light-emitting unit is 50 to 100 micrometers.

[0022] For example, according to an embodiment of the present disclosure, the thickness of the shielding wall is 250 to 270 micrometers, the width of the shielding wall is 350 to 500 micrometers, and the height of the light-emitting unit is 80 to 100 micrometers.

[0023] For example, according to an embodiment of the present disclosure, the backlight structure further includes a planar adhesive positioned between the shielding wall and the light-emitting unit and between two adjacent light-emitting units, the thickness of the planar adhesive being equal to or greater than the height of the light-emitting unit and smaller than the thickness of the shielding wall, and the orthogonal projection of the surface of the planar adhesive facing the substrate on the substrate is completely located within the orthogonal projection of the surface of the planar adhesive facing away from the substrate on the substrate.

[0024] For example, according to an embodiment of the present disclosure, the cross-sectional shape of the planar adhesive cut by the plane on which the central connecting lines of the two adjacent light-emitting units are located includes a trapezoid, the length of a first base side of the trapezoid that is away from the substrate is greater than the length of a second base side of the trapezoid that is closer to the substrate, the distance between the adjacent end points of the orthogonal projection of the first base side and the second base side on the substrate is 17 to 32 micrometers, and the plane is perpendicular to the substrate.

[0025] For example, according to an embodiment of the present disclosure, a thermally conductive adhesive is disposed on the side of the substrate away from the light-emitting unit, and at least one aperture is disposed in the thermally conductive adhesive.

[0026] For example, according to an embodiment of the present disclosure, the backlight structure further includes a light-diffusing structure located on a side of the light-emitting unit away from the substrate, the light-diffusing structure including at least one diffusion film, and the thickness of the diffusion film is 0.05 to 0.2 mm.

[0027] For example, according to an embodiment of the present disclosure, the backlight structure further includes a color conversion structure located on a side of the light-diffusing structure away from the light-emitting unit, the color conversion structure including a color conversion film 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 light and green light.

[0028] For example, according to an embodiment of the present disclosure, the color conversion structure further includes a prism located on a side of the color conversion film away from the light emitting unit.

[0029] For example, according to an embodiment of the present disclosure, the backlight structure further includes a prism structure located on a side of the color conversion structure away from the light-emitting unit, the prism structure including at least one prism layer, and the thickness of the prism layer is 0.05 to 0.2 millimeters.

[0030] Another embodiment of the present disclosure provides a backlight structure, comprising: a substrate; a shielding wall pattern and a plurality of light-emitting units disposed on the substrate. The shielding wall pattern includes a plurality of apertures arranged in an array along a first direction and a second direction, and a shielding wall surrounding each aperture. The plurality of apertures are configured to define a plurality of light areas, the first direction intersects with the second direction, and a plurality of light-emitting units are disposed in the plurality of light areas. At least three light-emitting units are disposed in each light area of ​​at least some of the light areas, and the centers of M light-emitting units of the at least three light-emitting units that are closest to an apex angle of the light area are sequentially connected to form an M-gon, the distance between the center of the M-gon and the center of the light area is less than 10% of the pitch of the light areas, a ratio of different side lengths of the M-gon is 0.9 to 1.1, a ratio of the pitch of the light areas to the side length of the M-gon is 1.7 to 2.3, and at least one side of the M-gon is parallel to at least one of the first direction and the second direction.

[0031] For example, according to an embodiment of the present disclosure, each light area of ​​the at least some light areas includes N light-emitting units, where N≧M, and the distance from the center of the i-th light-emitting unit to the apex angle of the light area is L i where i ranges from 1 to N, and L i , P and N are 8.5 ≧ P × (1 / L1 + 1 / L2 + … + 1 / L N ) ≥ 6.3.

[0032] For example, according to an embodiment of the present disclosure, the light emitting unit has a light intensity distribution I that satisfies I=I0cosmα, where 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, and m=(-ln2) / (lncosα 1 / 2 ), and α 1 / 2 is the angle formed by 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, the optical path of the light emitted from the light emitting unit in the normal direction is h, each light area of ​​the at least some light areas includes N light emitting units, N≧M, and the distance from the center of the i-th light emitting unit to the apex angle of the light area is L i where i ranges from 1 to N, and L i , h and N are 0.5≧{cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )]} ≥ 0.23 is satisfied.

[0033] For example, according to an embodiment of the present disclosure, the ratio of the light intensity at the edge position of the light area to the light intensity at the center position of the light area is 0.5 or more.

[0034] For example, according to an embodiment of the present disclosure, each light area of ​​the at least some light areas includes at least four light-emitting units, the at least four light-emitting units are arranged in the M-polygon, and an included angle formed between one of the first direction and the second direction and at least one side of the M-polygon is 0 degrees.

[0035] For example, according to an embodiment of the present disclosure, the shape of each light area of ​​the at least some light areas is a first square, each light area of ​​the at least some light areas includes at least four light-emitting units, the M-shaped polygon is a second square, and the included angle between the diagonal of the first square and the diagonal of the second square is 0 degrees.

[0036] For example, according to an embodiment of the present disclosure, the at least four light-emitting units include four light-emitting units, and the centers of the four light-emitting units are sequentially connected to form the second square.

[0037] For example, according to an embodiment of the present disclosure, each light area of ​​the at least some light areas includes three light-emitting units, and the centers of the three light-emitting units are sequentially connected to form a triangle, and one side of the triangle extends along the first direction or the second direction.

[0038] For example, according to an embodiment of the present disclosure, the light-emitting units installed in each light region are electrically connected, and the shielding wall includes a light-shielding material.

[0039] For example, according to an embodiment of the present disclosure, the light emitting unit includes a light emitting diode chip and a packaging structure configured to package the light emitting diode chip, and a gap is provided between the packaging structures of adjacent light emitting units.

[0040] For example, according to an embodiment of the present disclosure, the light emitting unit has a maximum dimension parallel to the substrate of 500 micrometers or less.

[0041] For example, according to an embodiment of the present disclosure, the shape of at least some of the light areas includes a rectangle, and two adjacent sides of the rectangle extend along the first direction and the second direction, respectively.

[0042] For example, according to an embodiment of the present disclosure, the thickness of the shielding wall is 250 to 270 micrometers, the width of the shielding wall is 350 to 500 micrometers, and the height of the light-emitting unit is 80 to 100 micrometers.

[0043] For example, according to an embodiment of the present disclosure, the backlight structure further includes a planar adhesive positioned between the shielding wall and the light-emitting unit and between two adjacent light-emitting units, the thickness of the planar adhesive being equal to or greater than the height of the light-emitting unit and smaller than the thickness of the shielding wall, and the orthogonal projection of the surface of the planar adhesive facing the substrate on the substrate is completely located within the orthogonal projection of the surface of the planar adhesive facing away from the substrate on the substrate.

[0044] For example, according to an embodiment of the present disclosure, the cross-sectional shape of the planar adhesive cut by the plane on which the central connecting lines of the two adjacent light-emitting units are located includes a trapezoid, the length of a first base side of the trapezoid that is away from the substrate is greater than the length of a second base side of the trapezoid that is closer to the substrate, the distance between the adjacent end points of the orthogonal projection of the first base side and the second base side on the substrate is 17 to 32 micrometers, and the plane is perpendicular to the substrate.

[0045] Another embodiment of the present disclosure provides a display device, comprising: a display panel and the above backlight structure, wherein the display panel is located on a light-emitting side of the backlight structure.

[0046] In order to more clearly describe the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments are briefly described below. Obviously, the drawings described below only relate to some of the embodiments of the present disclosure, and do not limit the present disclosure. [Brief explanation of the drawings]

[0047] [Figure 1] FIG. 1 is a partial planar structural schematic diagram of a backlight structure according to an example of an embodiment of the present disclosure. [Figure 2A] FIG. 2A is a schematic diagram of a light-emitting unit in a different example. [Figure 2B] FIG. 2B is a schematic diagram of a light-emitting unit in a different example. [Figure 3A] FIG. 3A is a schematic diagram of the equivalent emission of a Lambertian emitter. [Figure 3B] FIG. 3B is a schematic diagram of the distribution of the light output angle and light intensity of a Lambertian illuminant. [Figure 4] FIG. 4 is a partial cross-sectional structural schematic diagram taken along line AA′ shown in FIG. 1 according to an example of the embodiment of the present disclosure. [Figure 5] FIG. 5 is a schematic diagram of a light-emitting unit in one light area shown in FIG. [Figure 6] FIG. 6 is a schematic diagram illustrating the distribution of light-emitting units in one light region according to another example of the embodiment of the present disclosure. [Figure 7] FIG. 7 is a schematic diagram illustrating the distribution of light-emitting units in one light region according to another example of the embodiment of the present disclosure. [Figure 8] FIG. 8 is a schematic diagram illustrating the distribution of light-emitting units in one light region according to another example of the embodiment of the present disclosure. [Figure 9] FIG. 9 is a schematic diagram illustrating the distribution of light-emitting units in one light region according to another example of the embodiment of the present disclosure. [Figure 10] FIG. 10 is a partial plan view showing a schematic structure of a backlight structure according to another example of the embodiment of the present disclosure. [Figure 11] FIG. 11 is a schematic partial cross-sectional view of a structure taken along line BB' shown in FIG. 10 according to an example of the embodiment of the present disclosure. [Figure 12] FIG. 12 is a schematic diagram of a light-emitting unit in one light region shown in FIG. [Figure 13A] FIG. 13A is a schematic diagram of one light area according to another example of an embodiment of the present disclosure. [Figure 13B] FIG. 13B is a schematic diagram of one light area according to another example of the embodiment of the present disclosure. [Figure 13C] FIG. 13C is a schematic diagram of one light area according to another example of an embodiment of the present disclosure. [Figure 13D]FIG. 13D is a schematic diagram of one light region according to another example of an embodiment of the present disclosure. [Figure 13E] FIG. 13E is a schematic diagram of one light area according to another example of an embodiment of the present disclosure. [Figure 13F] FIG. 13F is a schematic diagram of one light area according to another example of an embodiment of the present disclosure. [Figure 13G] FIG. 13G is a schematic diagram of one light region according to another example of an embodiment of the present disclosure. [Figure 14] FIG. 14 is a relationship diagram of relative light intensity at edge positions of the light area after rotating the M-gon in the light area shown in FIGS. 13A to 13G by different angles. [Figure 15A] FIG. 15A is a schematic diagram of one light area according to another example of an embodiment of the present disclosure. [Figure 15B] FIG. 15B is a schematic diagram of one light area according to another example of an embodiment of the present disclosure. [Figure 15C] FIG. 15C is a schematic diagram of one light region according to another example of an embodiment of the present disclosure. [Figure 15D] FIG. 15D is a schematic diagram of one light region according to another example of an embodiment of the present disclosure. [Figure 15E] FIG. 15E is a schematic diagram of one light area according to another example of an embodiment of the present disclosure. [Figure 15F] FIG. 15F is a schematic diagram of one light area according to another example of an embodiment of the present disclosure. [Figure 15G] FIG. 15G is a schematic diagram of one light region according to another example of an embodiment of the present disclosure. [Figure 16] FIG. 16 is a relationship diagram of relative light intensity at edge positions of the light area after rotating the M-gon in the light area shown in FIGS. 15A to 15G by different angles. [Figure 17A] FIG. 17A is a schematic diagram of one light area according to another example of an embodiment of the present disclosure. [Figure 17B] FIG. 17B is a schematic diagram of one light area according to another example of an embodiment of the present disclosure. [Figure 17C]FIG. 17C is a schematic diagram of one light region according to another example of an embodiment of the present disclosure. [Figure 17D] FIG. 17D is a schematic diagram of one light region according to another example of an embodiment of the present disclosure. [Figure 17E] FIG. 17E is a schematic diagram of one light area according to another example of an embodiment of the present disclosure. [Figure 17F] FIG. 17F is a schematic diagram of one light area according to another example of an embodiment of the present disclosure. [Figure 17G] FIG. 17G is a schematic diagram of one light region according to another example of an embodiment of the present disclosure. [Figure 18] FIG. 18 is a relationship diagram of relative light intensity at edge positions of the light area after rotating the M-gon in the light area shown in FIGS. 17A to 17G by different angles. [Figure 19] FIG. 19 is a schematic diagram illustrating the distribution of light-emitting units in one light region according to another example of the embodiment of the present disclosure. [Figure 20] FIG. 20 is a partial cross-sectional schematic view taken along the line AA′ shown in FIG. 1 according to another example of the embodiment of the present disclosure. [Figure 21] FIG. 21 is a partial cross-sectional schematic view taken along line BB' shown in FIG. 10 according to another example of the embodiment of the present disclosure. [Figure 22] FIG. 22 is a schematic partial cross-sectional view of another example of the embodiment of the present disclosure taken along the line BB' shown in FIG. [Figure 23] FIG. 23 is a partial cross-sectional schematic view of a backlight structure including the substrate, the shielding wall, and the light-emitting unit shown in FIG. [Figure 24] FIG. 24 is a schematic diagram of a partial cross-sectional structure of a display device according to another embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0048] In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Of course, the described embodiments are only a part of the embodiments of the present disclosure, but not all of the embodiments. Based on the described embodiments of the present disclosure, any other embodiments that a person skilled in the art can obtain without inventive efforts fall within the scope of protection of the present disclosure.

[0049] Unless otherwise defined, technical or scientific terms used in this disclosure should have the ordinary meaning understood by a person skilled in the art in the field to which this disclosure belongs. The terms "first," "second," and similar terms used in this disclosure do not denote any order, number, or importance, but are merely used to distinguish different components. Similar terms such as "comprise" or "include" refer to the elements or components described before the term covering the elements or components listed after the term and their equivalents, and do not exclude other elements or components.

[0050] Characteristic features such as "parallel," "perpendicular," and "same" used in the examples of the present disclosure all include strict features such as "parallel," "perpendicular," and "same," as well as features with a certain degree of error such as "almost parallel," "almost perpendicular," and "almost the same," and indicate that the feature is within an acceptable deviation range from a specific value determined by a person skilled in the art, taking into account the error associated with measurement and the measurement of a specific quantity (e.g., limitations of the measurement system). For example, "almost" can indicate that the feature is within one or more standard deviations, or within 10% or 5% of the value. Unless the number of a component is specifically indicated in the following description of the examples of the present disclosure, it means that the component may be one or more, or may be understood to be at least one. "At least one" refers to one or more, and "multiple" refers to at least two.

[0051] The present disclosure provides a backlight structure and a display device. The backlight structure includes a substrate, a shielding wall pattern, and a plurality of light-emitting units disposed on the substrate. The shielding wall pattern includes a plurality of apertures arranged in an array along a first direction and a second direction, and a shielding wall surrounding each aperture. The apertures are configured to define a plurality of light areas, and a plurality of light-emitting units are disposed in the plurality of light areas. The substrate includes a middle region and an edge region surrounding the middle region. At least three light-emitting units are disposed in each light area located at least in the middle region. The centers of M light-emitting units among the at least three light-emitting units that are closest to the apex angle of the light area are sequentially connected to form an M-polygon, the distance between the center of the M-polygon and the center of the light area is less than 10% of the pitch of the light area, and the included angles formed by the first direction, the second direction, and each side of the M-polygon are all greater than 0 degrees.

[0052] The backlight structure according to the present disclosure contributes to improving the uniformity of light output in the light area by setting the angles formed by the sides of the M-shaped polygon and the first and second directions.

[0053] The present disclosure also provides another backlight structure. The backlight structure includes a substrate, a shielding wall pattern, and a plurality of light-emitting units disposed on the substrate. The shielding wall pattern includes a plurality of apertures arranged in an array along a first direction and a second direction, and a shielding wall surrounding each aperture. The apertures are configured to define a plurality of light areas, and a plurality of light-emitting units are disposed in the plurality of light areas. At least three light-emitting units are disposed in each light area of ​​at least some of the light areas, and the centers of M light-emitting units of the at least three light-emitting units that are closest to the apex angle of the light area are sequentially connected to form an M-polygon, the distance between the center of the M-polygon and the center of the light area is less than 10% of the pitch of the light areas, the ratio of the lengths of the different sides of the M-polygon is 0.9 to 1.1, the ratio of the pitch of the light areas to the side length of the M-polygon is 1.7 to 2.3, and at least one side of the M-polygon is parallel to at least one of the first direction and the second direction.

[0054] The backlight structure of the present disclosure contributes to improving the uniformity of light output in the light area by setting the relationship between the side length of the M-gon and the pitch of the light area, setting the positional relationship between the center of the M-gon and the center of the light area, and making the sides of the M-gon parallel to at least one of the first direction and the second direction.

[0055] Hereinafter, a backlight structure and a display device according to an embodiment of the present disclosure will be described with reference to the drawings.

[0056] 1 is a partial planar structural schematic diagram of a backlight structure according to an embodiment of the present disclosure. As shown in FIG. 1, the backlight structure includes a substrate 100, a shielding wall pattern 200 and a plurality of light-emitting units 310 mounted on the substrate 100. The shielding wall pattern 200 includes a plurality of apertures 210 arranged in an array along a first direction and a second direction, and a shielding wall 220 surrounding each aperture 210. The plurality of apertures 210 are configured to define a plurality of light regions 300, and the first direction intersects with the second direction. The plurality of light-emitting units 310 are arranged in the plurality of light regions 300. At least three light-emitting units 310 are installed in each light area 300 of at least some of the light areas 300, and the centers of M light-emitting units 310 of the at least three light-emitting units 310 that are closest to the apex angle of the light area 300 are sequentially connected to form an M-polygon, the distance between the center C1 of the M-polygon and the center C2 of the light area 300 is less than 10% of the pitch P of the light area 300, the ratio of different side lengths of the M-polygon is 0.9 to 1.1, the ratio of the pitch P of the light area 300 to the side length P' of the M-polygon is 1.7 to 2.3, and at least one side of the M-polygon is parallel to at least one of the first direction and the second direction.

[0057] The present disclosure contributes to improving the light output uniformity of the light area by setting the relationship between the side length of the M-gon and the pitch of the light area, setting the positional relationship between the center of the M-gon and the center of the light area, and making the sides of the M-gon parallel to at least one of the first direction and the second direction.

[0058] For example, one of the first direction and the second direction may be the X direction shown in FIG. 1, and the other of the first direction and the second direction may be the Y direction shown in FIG. 1, and the embodiments of the present disclosure will be described schematically assuming that the first direction is the X direction and the second direction is the Y direction.

[0059] For example, the first direction is perpendicular to the second direction.

[0060] For example, the angle formed between the first direction and the second direction may be 80 to 110 degrees, or 85 to 100 degrees, or 88 to 92 degrees. The embodiments of the present disclosure are not limited thereto, and the first direction and the second direction are interchangeable.

[0061] For example, as shown in FIG. 1, a plurality of openings 210 correspond one-to-one to a plurality of light areas 300, and each opening 210 is for defining one light area 300.

[0062] For example, the number of light emitting units 310 arranged in different light areas 300 may be the same or different.

[0063] For example, the embodiments of the present disclosure schematically illustrate a case where the number of light-emitting units arranged in different light areas is the same and the arrangement shape of the light-emitting units in each light area is the same, thereby improving the light output uniformity of the backlight structure.

[0064] For example, as shown in FIG. 1, a plurality of light regions 300 are uniformly arranged, and a plurality of light emitting units 310 located on the substrate 100 are uniformly arranged.

[0065] For example, the number of light-emitting units 310 arranged in some of the light regions 300 in one region on the substrate 100 may be the same, and the number of light-emitting units 310 arranged in some of the light regions 300 in another region on the substrate 100 may be different. The locations of the one region and the other region may be set according to the needs of the product. For example, the one region may be located in the central region of the substrate and the other region may be located in the edge region of the substrate, or the one region may be located in the edge region of the substrate and the other region may be located in the central region of the substrate, or the one region and the other region may both be located in different edge regions of the substrate.

[0066] 1, M is equal to or less than the number of light-emitting units 310 installed in each light area 300. For example, the M polygons may be triangles, squares, hexagons, etc., and the embodiments of the present disclosure are not limited thereto.

[0067] For example, as shown in FIG. 1, at least three light-emitting units 310 are installed in each of all the light areas 300 .

[0068] For example, each light area 300 may be provided with three light-emitting units 310, four light-emitting units 310, five light-emitting units 310, or six light-emitting units 310, etc.

[0069] For example, as shown in FIG. 1, the shape of the light area 300 may be polygonal, such as triangular, rectangular, or hexagonal.

[0070] The center of the light-emitting unit refers to the geometric center of the light-emitting unit, for example, the orthogonal projection of the geometric center on the substrate overlaps with the center of the two-dimensional plane of the light-emitting unit on the substrate. The line connecting the centers of the M light-emitting units in sequence may refer to a line connecting the centers of the M light-emitting units in a clockwise or counterclockwise direction.

[0071] 1, the pitch P of the light areas 300 may be the length of the central connecting line of adjacent light areas 300 arranged in a first direction, or the length of the central connecting line of adjacent light areas 300 arranged in a second direction. For example, the ratio of the pitch of the light areas 300 in the first direction to the pitch of the light areas 300 in the second direction may be 0.9 to 1.1, and the pitches of the light areas 300 in the two directions may be equal.

[0072] For example, as shown in FIG. 1 , the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 9.5% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 9% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 8.5% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 8% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 7.5% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 7% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 6.5% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 6% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 5.5% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 5% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 4.5% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 4% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 3.5% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light area 300 is smaller than 3% of the pitch P of the light area 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light area 300 is smaller than 2.5% of the pitch P of the light area 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light area 300 is smaller than 2% of the pitch P of the light area 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light area 300 is smaller than 1.5% of the pitch P of the light area 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light area 300 is smaller than 1% of the pitch P of the light area 300.For example, the distance between the center C1 of the M-gon and the center C2 of the light area 300 is smaller than 0.5% of the pitch P of the light area 300.

[0073] For example, as shown in FIG. 1, the center C1 of the M-gon overlaps with the center C2 of the light area 300.

[0074] For example, as shown in FIG. 1, the ratio of the different side lengths of the M-gon is 0.98 to 1.08.

[0075] For example, the ratio of the different side lengths of the M-gon is 0.96 to 1.04.

[0076] 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.

[0077] For example, as shown in Figure 1, the lengths of the sides of an M-gon are equal and are all P'.

[0078] For example, as shown in FIG. 1, the ratio of the pitch P of the light area 300 to the side length P' of the M-polygon is 1.7 to 2.3. For example, the ratio of the pitch P of the light area 300 to the side length P' of the M-polygon is 1.65 to 2.25. For example, the ratio of the pitch P of the light area 300 to the side length P' of the M-polygon is 1.7 to 2.2. For example, the ratio of the pitch P of the light area 300 to the side length P' of the M-polygon is 1.75 to 2.15. For example, the ratio of the pitch P of the light area 300 to the side length P' of the M-polygon is 1.8 to 2.1. For example, the ratio of the pitch P of the light area 300 to the side length P' of the M-polygon is 1.85 to 2.05. For example, the ratio of the pitch P of the light area 300 to the side length P' of the M-polygon is 1.9 to 2.

[0079] For example, as shown in FIG. 1, the pitch P of the light area 300 is twice the side length P' of the M-gon.

[0080] For example, as shown in FIG. 1, at least one side of the M-gon is parallel to at least one of the first direction and the second direction.

[0081] For example, an M-gon may include only sides parallel to a first direction, or an M-gon may include only sides parallel to a second direction, or an M-gon may include a side parallel to the first direction and a side parallel to the second direction.

[0082] 2A and 2B are schematic diagrams of light emitting units in different examples, FIG. 3A is a schematic diagram of the equivalent light emission of a Lambertian light emitter, and FIG. 3B is a schematic diagram of the distribution of the light output angle and light intensity of a Lambertian light emitter.

[0083] For example, as shown in Figures 3A and 3B, if the luminous intensity of an extended light source is dI ∝ cosmα, i.e., its brightness is independent of direction, then such a projectile is called a cosine luminous source or Lambert (JH Lambert) luminous source, and the law of emitting a luminous flux according to the above-mentioned cosα law is called the Lambert cosine law, where dI is the luminous intensity along a direction r in which each bin dS of the extended light surface is located, and α is the included angle between the light emitting direction r of the light source and the normal n.

[0084] The light intensity distribution is I α =I O Satisfying cosmα, I O is the light intensity distribution perpendicular to the normal direction of the light source surface, and m=(-In2) / (Incosα 1 / 2 ), that is, m is α 1 / 2 is determined by, where α 1 / 2 is defined as the angle between the emission direction and the normal n when the emission intensity decreases to half of the emission intensity corresponding to the normal direction, and α 1 / 2 The value range of α is 40° to 80°. 1 / 2 The value range of may be 48° to 75°, for example, α 1 / 2 The value range of may be 46° to 78°, for example, α 1 / 2 The value range of α may be 45° to 76°. In other words, when the light intensity of the light emitted along the normal line n is 1, the included angle with the normal line n is α 1 / 2 The light intensity of the emitted light is 1 / 2, but the included angle between the emission direction and the normal n is α 1 / 2That is, although a Lambertian illuminant can theoretically emit an infinite number of rays, rays with different included angles from the normal n will have different intensities.

[0085] In some examples, as shown in FIG. 2A , the light-emitting unit 310 includes a light-emitting diode chip 323 and a packaging structure 324 configured to package the light-emitting diode chip 323, and a gap is provided between the packaging structures 324 of adjacent light-emitting units 310.

[0086] For example, as shown in FIG. 2A , the light-emitting unit 310 includes a packaged light-emitting diode chip, and the light-emitting diode chip 323 may be a submillimeter light-emitting diode chip (miniLED), and the dimension of the unpackaged light-emitting diode chip 323 in a direction perpendicular to the substrate 100 may be 70 micrometers to 180 micrometers, and the maximum dimension of the unpackaged light-emitting diode chip 323 in a direction parallel to the substrate 100 is 500 micrometers or less.

[0087] For example, the light emitting unit 310 is a packaged light emitting diode chip, and the maximum dimension and thickness of the packaged light emitting diode chip 323 in the direction parallel to the substrate 100 are both larger than the corresponding parameters of the unpackaged light emitting diode chip 323.

[0088] For example, as shown in FIG. 2A, a single light emitting diode chip 323 may be packaged as an independent device to form a light emitting unit 310, which is then placed in a corresponding position in the backlight structure and fixedly connected to a pad on the substrate 100.

[0089] Since the unpackaged light emitting diode chip may be regarded as a Lambertian emitter, after the light emitting diode chip is packaged, the light output angle range is +α 1 / 2 ~-α 1 / 2 The light inside can be emitted, but +α 1 / 2 ~-α 1 / 2The light other than the above is basically limited to the independent device by total reflection. At this time, the included angle θ between the light emitted from the light emitting unit 310 at the outermost edge and the substrate 100 is α 1 / 2 It may also be the complementary angle of

[0090] For example, as shown in FIG. 2A, a light emitting unit 310 or a light emitting diode chip 323 is connected to a pad 321 on the substrate 100 by a welding metal 322 .

[0091] For example, the weld metal 322 may include solder.

[0092] For example, as shown in FIG. 2A, a package structure 324 may be doped with a color conversion material 325.

[0093] For example, the color conversion material 325 may include a phosphor material or a quantum dot material.

[0094] For example, color conversion material 325 may include a material that converts blue light to white light.

[0095] For example, the color conversion material 325 may include a material that converts blue light into red light and green light. Of course, the embodiments of the present disclosure are not limited thereto, and the color conversion material may be doped into the package structure.

[0096] For example, as shown in FIG. 2A, a light emitting diode chip 323 may be placed on a corresponding position on a substrate 100 and then packaged.

[0097] For example, each LED chip may be packaged with a transparent material, such as transparent silica gel, by screen printing or dot printing to form a package structure 324. Depending on the shape of the package structure 324, the light emission angle of the LED chip 323 may be modulated to change the light emission angle of the light emitting unit 310.

[0098] For example, as shown in FIG. 2A, the surface of the package structure 324 facing away from the substrate 100 may be curved, and the light emitted from the light emitting unit 310 at the most peripheral portion may have an output angle of α 1 / 2 Slightly larger than α 1 / 2 When the value range of is 40° to 65°, the value range of the light exit angle of the light emitted from the light emitting unit 310 at the outermost edge may be 50° to 70°.

[0099] For example, the package structure 324 may have any necessary dimensions in a direction perpendicular to the substrate 100. For example, the dimension of the package structure 324 in a direction perpendicular to the substrate 100 may be less than 0.5 millimeters. For example, the dimension of the package structure 324 in a direction perpendicular to the substrate 100 may be between 0.1 and 0.4 millimeters. For example, the dimension of the package structure 324 in a direction perpendicular to the substrate 100 may be between 0.2 and 0.4 millimeters. For example, the dimension of the package structure 324 in a direction perpendicular to the substrate 100 may be less than 0.3 millimeters. For example, the dimension of the package structure 324 in a direction perpendicular to the substrate 100 may be between 0.25 and 0.35 millimeters. For example, the dimension of the package structure 324 in a direction perpendicular to the substrate 100 may be between 0.15 and 0.25 millimeters. For example, the dimension of the package structure 324 in a direction perpendicular to the substrate 100 may be approximately 0.2 millimeters. For example, the dimension of the package structure 324 in a direction perpendicular to the substrate 100 may be approximately 0.3 millimeters.

[0100] For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 may 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 may 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 may 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 may 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 may be greater than 0.5 mm. For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 may be greater than 1.0 mm. For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 may be greater than 2.0 mm. For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 may be smaller than 2.0 mm.

[0101] For example, the ratio of the maximum dimension of the package structure 324 in a direction parallel to the substrate 100 to its dimension in a direction perpendicular to the substrate 100 may be greater than 3. For example, the ratio of the maximum dimension of the package structure 324 in a direction parallel to the substrate 100 to its dimension in a direction perpendicular to the substrate 100 may be between 4 and 6. For example, the ratio of the maximum dimension of the package structure 324 in a direction parallel to the substrate 100 to its dimension in a direction perpendicular to the substrate 100 may be less than 10.

[0102] For example, after being packaged as an independent device, the geometric center of the orthogonal projection of the light-emitting diode chip on the base substrate may overlap with the geometric center of the orthogonal projection of the independent device on the base substrate, but is not limited to this. The geometric center of the orthogonal projection of the light-emitting diode chip on the base substrate may be offset from the geometric center of the orthogonal projection of the independent device on the base substrate, and the height of the light-emitting unit 310 in a direction perpendicular to the substrate 100 is the height of the packaged light-emitting diode chip.

[0103] 2A , the dimension of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is 200 micrometers or less. For example, the dimension of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is 180 micrometers or less. For example, the dimension of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is 160 micrometers or less. For example, the dimension of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is 150 micrometers or less. For example, the dimension of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is 140 micrometers or less. For example, the dimension of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is 130 micrometers or less. For example, the dimension of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is 120 micrometers or less. For example, the dimension of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is 110 micrometers or less. For example, the dimension of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is 100 micrometers or less. The dimension of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is the height of the light-emitting unit 310.

[0104] In some examples, as shown in FIG. 2A, the height of the light-emitting unit 310 is 50 to 100 micrometers.

[0105] In some examples, as shown in FIG. 2A, the height of the light-emitting unit 310 is 80 to 100 micrometers.

[0106] For example, the height of the light-emitting unit 310 is 55 to 95 micrometers. For example, the height of the light-emitting unit 310 is 60 to 90 micrometers. For example, the height of the light-emitting unit 310 is 70 to 85 micrometers. For example, the height of the light-emitting unit 310 is 75 to 80 micrometers.

[0107] In some examples, as shown in FIGS. 1 to 2A , the maximum dimension of the light-emitting unit 310 in the direction parallel to the substrate 100 is 500 micrometers or less. For example, the maximum dimension of the light-emitting unit 310 in the direction parallel to the substrate 100 is 450 micrometers or less. For example, the maximum dimension of the light-emitting unit 310 in the direction parallel to the substrate 100 is 400 micrometers or less. For example, the maximum dimension of the light-emitting unit 310 in the direction parallel to the substrate 100 is 350 micrometers or less. For example, the maximum dimension of the light-emitting unit 310 in the direction parallel to the substrate 100 is 330 micrometers or less. For example, the maximum dimension of the light-emitting unit 310 in the direction parallel to the substrate 100 is 300 micrometers or less. For example, the maximum dimension of the light-emitting unit 310 in the direction parallel to the substrate 100 is 280 micrometers or less.

[0108] 1, the dimension of the light-emitting unit 310 in at least one of the first direction and the second direction is 250 micrometers or less. For example, the dimension of the light-emitting unit 310 in at least one of the first direction and the second direction is 240 micrometers or less. For example, the dimension of the light-emitting unit 310 in at least one of the first direction and the second direction is 230 micrometers or less. For example, the dimension of the light-emitting unit 310 in at least one of the first direction and the second direction is 220 micrometers or less. For example, the dimensions of the light-emitting unit 310 in both the first direction and the second direction are 219 micrometers.

[0109] The shape of the light-emitting unit may refer to the shape of the light-emitting unit as orthogonally projected onto the substrate.

[0110] For example, the shape of the light-emitting unit may be a quadrangle, such as a rectangle, and the maximum dimension of the light-emitting unit in a direction parallel to the substrate may be the length of the diagonal of the rectangle.

[0111] For example, the shape of the light-emitting unit may be elliptical, and the maximum dimension of the light-emitting unit in a direction parallel to the substrate may be the length of the major axis of the ellipse.

[0112] For example, the shape of the light-emitting unit may be circular, and the largest dimension of the light-emitting unit in a direction parallel to the substrate may be its diameter.

[0113] For example, as shown in FIG. 2B, the light-emitting unit 310 may include only an unpackaged light-emitting diode chip 323, and the maximum dimension of the unpackaged light-emitting diode chip 323 in a direction parallel to the substrate 100 is 500 micrometers or less.

[0114] For example, the light-emitting unit 310 is an unpackaged light-emitting diode chip 323, the light-emitting diode chip 323 is a submillimeter inorganic light-emitting diode (miniLED), the thickness of the unpackaged light-emitting diode chip 323 may be 70 micrometers to 180 micrometers, and the maximum dimension of the unpackaged light-emitting diode chip 323 in a direction parallel to the substrate 100 is 500 micrometers or less.

[0115] For example, the unpackaged light emitting diode chip 323 may be equivalently a Lambertian emitter, and the included angle with the normal n emanating from the unpackaged light emitting diode chip 323 is α 1 / 2 Since the light intensity of light greater than α is relatively small and falls outside the scope of the present disclosure, the embodiment of the present disclosure assumes that the angle between the unpackaged light-emitting diode chip 323 and the normal n is α 1 / 2 is defined as the light at the edge of the unpackaged light-emitting diode chip 323, that is, the light at the edge of the light-emitting unit 310.

[0116] For example, as shown in FIG. 2B, a protective layer 326 is disposed on the side of the plurality of light-emitting units 310 that faces away from the substrate 100 .

[0117] For example, a protective layer 326 may be used to collectively protect multiple light-emitting diode chips 323 to prevent the light-emitting diode chips 323 from being scratched or hit during subsequent manufacturing processes, such as placing the optical film on the substrate 100 or transporting it.

[0118] For example, multiple light emitting diode chips 323 may share the same protective layer 326. For example, the protective layer 326 may be made of a transparent material, such as transparent silica gel. For example, the protective layer 326 may be filled with a light area.

[0119] For example, the surface of the protective layer 326 that faces away from the substrate 100 may be a substantially flat surface, thereby increasing the yield of the display device.

[0120] For example, to reduce total reflection of light emitted from the light-emitting diode chip 323 within the protective layer 326, the refractive index of the protective layer 326 may be between the refractive index of the light-emitting diode chip 323 and the refractive index of a material (e.g., air) adjacent to the protective layer 326.

[0121] For example, the refractive index of the protective layer 326 may be between 1.2 and 1.6. For example, the refractive index of the protective layer 326 may be between 1.3 and 1.4. For example, the refractive index of the protective layer 326 may be less than 1.4. For example, the refractive index of the protective layer 326 may be less than 1.5. For example, the refractive index of the protective layer 326 may be greater than 1.1. For example, the refractive index of the protective layer 326 may be greater than 1.2. For example, the refractive index of the protective layer 326 may be greater than 1.3. For example, the refractive index of the protective layer 326 may be approximately 1.35. For example, the protective layer 326 may cover all the unpackaged light-emitting diode chips 323 on the substrate 100, and the protective layer 326 may have a flat or slightly uneven upper surface. For example, the thickness of the protective layer 326 may be slightly greater than the thickness of the unpackaged light-emitting diode chips 323.

[0122] FIG. 4 is a partial cross-sectional structural schematic diagram taken along line AA′ shown in FIG. 1 according to an example of the embodiment of the present disclosure.

[0123] In some examples, as shown in FIG. 4, the thickness of the shielding wall 220 is greater than the height of the light-emitting unit 310 in a direction perpendicular to the substrate 100 .

[0124] In some examples, as shown in FIG. 4, the thickness of the shielding wall 220 is 200 to 400 micrometers, and the height of the light-emitting unit 310 is 50 to 100 micrometers.

[0125] The thickness of the shielding wall 220 refers to the dimension of the shielding wall 220 in a direction perpendicular to the substrate 100 .

[0126] In some examples, as shown in FIG. 4, the thickness of the shielding wall 220 is 250 to 270 micrometers.

[0127] For example, the thickness of the shielding wall 220 may be 210 to 390 micrometers. For example, the thickness of the shielding wall 220 may be 220 to 370 micrometers. For example, the thickness of the shielding wall 220 may be 230 to 350 micrometers. For example, the thickness of the shielding wall 220 may be 235 to 320 micrometers. For example, the thickness of the shielding wall 220 may be 240 to 300 micrometers. For example, the thickness of the shielding wall 220 may be 245 to 280 micrometers.

[0128] In some examples, the width of the shielding wall 220 is 350 to 500 micrometers, as shown in Fig. 4. The width of the shielding wall 220 refers to the dimension in the first direction of the shielding wall 220 between two adjacent light areas 300 in the first direction, or the dimension in the second direction of the shielding wall 220 between two adjacent light areas 300 in the second direction.

[0129] For example, as shown in FIG. 4, the width of the shielding wall 220 may be 370 to 480 micrometers. For example, the width of the shielding wall 220 may be 350 to 450 micrometers. For example, the width of the shielding wall 220 may be 360 ​​to 440 micrometers. For example, the width of the shielding wall 220 may be 370 to 430 micrometers. For example, the width of the shielding wall 220 may be 380 to 420 micrometers. For example, the width of the shielding wall 220 may be 390 to 410 micrometers. For example, the width of the shielding wall 220 may be 400 micrometers.

[0130] In some examples, as shown in FIGS. 1 and 4, the shielding wall 220 includes a light-blocking material.

[0131] For example, the material of the shielding wall 220 may include black resin.

[0132] In some examples, the light-emitting units 310 installed in each light area 300 are electrically connected, as shown in Figure 1. For example, the light-emitting units 310 in each light area 300 are connected in series. For example, the light-emitting units 310 in each light area 300 are connected in parallel.

[0133] In the backlight structure according to the present disclosure, by surrounding each light area with a light-blocking shielding wall, the probability of crosstalk occurring in the light between different light areas is reduced, thereby contributing to improving the halation phenomenon.

[0134] In some examples, as shown in FIG. 1, the shape of at least some of the light areas 300 includes a rectangle, and two adjacent sides of the rectangle extend along the first direction and the second direction, respectively.

[0135] For example, all the light areas 300 have a rectangular shape.

[0136] For example, the shapes and dimensions of different light areas 300 are the same. Of course, the embodiments of the present disclosure are not limited thereto, and according to product needs, the substrate may be divided into multiple areas, and the dimensions of the light areas in different areas may be different, or the dimensions of the light areas in the same area may be the same.

[0137] Fig. 5 is a schematic diagram of light-emitting units in one light region shown in Fig. 1. Fig. 5 shows a schematic diagram of a case where one light region includes four light-emitting units and the M-shaped polygon is a rectangle.

[0138] For example, as shown in FIG. 5, the shape of one light area 300 may be a square, and the M-shaped polygon formed by the central connecting lines of the four light-emitting units 310 located in the light area 300 is a square.

[0139] For example, I α =I O Let cosmα be formula 1, and m = (-In2) / (Incosα 1 / 2 ) is Formula 2, and α 1 / 2 may be in the range of 45° to 75°, for example 60°, and m min =0.5, m max = 2 is obtained. For example, the vertical component of the output optical path of one light-emitting unit, for example, the optical path h in the direction of the normal n shown in FIG. 3A, may be 100 to 350 micrometers. For example, h may be 120 to 330 micrometers. For example, h may be 150 to 300 micrometers. For example, h may be 170 to 280 micrometers. For example, h may be 200 to 250 micrometers. The above h is equal to the difference between the height of the shielding wall and the height of the light-emitting unit, and for example, h is the vertical height difference from the surface of the light-emitting unit facing away from the substrate to the highest point of the shielding wall.

[0140] For example, as shown in FIG. 5, if the length of the pitch P of the light area 300 is P and the distance between the center of the light emitting unit 314 and the center of the light emitting unit 313 is P / 2, L2, L4, and P are expressed as follows: L2=L4=[(3×P / 4) 2 +(P / 4)2 ] 1 / 2 =(10) 1 / 2 ×P / 4, and L1 and P satisfy L1=(2) 1 / 2 ×P / 4, and L3 and P are 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 apex angle of the light area.

[0141] 3A and 5, θ is the complementary angle of α, i.e., θ=90°−α, tan θ=h / L, and then cosmα=sinm[(π / 2)−α]. For example, the α of the light-emitting unit 310, e.g., a packaged light-emitting diode chip, 1 / 2 may be 60°, in which case m≈1.

[0142] For example, since h is on the order of micrometers and L is on the order of millimeters, and L>>h, θ is small, and in this case, tanθ ≒ θ = h / L, and 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. As a result, the light intensity I1 at the E1 position shown in Figure 5 is 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 ), where the value of N is the number of light-emitting units in the light area, and N shown in FIG. 5 may be 4.

[0143] The above relational expression 1 is I1 = I0 × m × h × (1 / L1 + 1 / L2 + ... + 1 / L N )teeth

number

[0144] Substituting the above L2, L4, L1, and L3 into the above formula, 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 can be obtained.

[0145] For example, the light intensity I2 at the E2 position shown in Figure 5 is ≈ 4 × I0 × m × h / [(2) 1 / 2 ×P / 4]=11.3×I0×m×h / P.

[0146] For example, I1 / I2=0.56.

[0147] In some examples, as shown in FIG. 5, the ratio of the light intensity at an edge position of the light area 300, for example, the E1 area, to the light intensity at a center position of the light area 300, for example, the E2 area, is 0.5 or more.

[0148] For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.55 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.6 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.65 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.7 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.75 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.8 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.85 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.9 or more.

[0149] In some examples, as shown in FIG. 5, I0, m, and h in the above Relation 1 may be regarded as constants, and each light area 300 of at least some of the light areas 300 includes N light-emitting units, where N≧M, and the distance from the center of the i-th light-emitting unit 310 to the apex angle of the light area 300 is L i where i ranges from 1 to N, and L i , P and N are 8.5 ≧ P × (1 / L1 + 1 / L2 + … + 1 / L N ) ≧ 6.3. Here, P×(1 / L1 + 1 / L2 + … + 1 / L N ) may be taken as an approximate reference value of the unitless relative light intensity at the edge position. N is the number of N light-emitting units. N indicates the sum of the reciprocals of

[0150] 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.

[0151] The apex angle of the light area may refer to the E1 area shown in FIG.

[0152] The above relational expression 8.5≧P×(1 / L1+1 / L2+…+1 / L N ) ≧ 6.3 is

number

number

[0153] For example, as shown in FIG. 5, the light area 300 includes four light-emitting units, 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 where i is in the range of 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.

[0154] For example, as shown in FIG. 1, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.7 to 2.3. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.65 to 2.25. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.7 to 2.2. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.75 to 2.15. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.8 to 2.1. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.85 to 2.05. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.9 to 2.

[0155] In some examples, as shown in Figures 1 and 5, each light area 300 of at least some of the light areas 300 includes at least four light-emitting units 310, and the at least four light-emitting units 310 are arranged in an M-shaped polygon, and the included angle between one of the first direction and the second direction and at least one side of the M-shaped polygon is 0 degrees.

[0156] For example, as shown in FIG. 1, at least some of the light areas 300 are square in shape.

[0157] In some examples, as shown in FIG. 1, the shape of each light area 300 of at least some of the light areas 300 is a first square, and each light area 300 of at least some of the light areas 300 includes at least four light-emitting units 310, and lines sequentially connecting the centers of four light-emitting units 310 that are closest to the four vertices of the light area 300 among the at least four light-emitting units 310 form a second square, and the included angle between the diagonal of the first square and the diagonal of the second square is 0 degrees.

[0158] For example, a diagonal of a first square may overlap a diagonal of a second square.

[0159] In some examples, as shown in FIG. 1, the at least four light-emitting units 310 include four light-emitting units 311, 312, 313, and 314, and a line connecting the centers of the four light-emitting units 311, 312, 313, and 314 in sequence forms a second square.

[0160] For example, the angle formed between two sides of the second square and the first direction is 0 degrees, and the angle formed between two other sides of the second square and the second direction is 0 degrees.

[0161] For example, as shown in FIG. 1, the plurality of light emitting units 310 in the light area 300 are uniformly arranged.

[0162] 1 and 5, the pitch of the light regions 300 may be 4.46 mm, the pitch of the light units 310 may be 2.23 mm, and the dimensions of the light units 310 may be 0.22 mm x 0.22 mm. For example, the number of light regions 300 may be 2596, and for example, the number of light regions 300 arranged along one of the first direction and the second direction may be 44, and the number of light regions 300 arranged along the other of the first direction and the second direction may be 59. For example, the installation dimensions of the light regions 300 on the substrate may be 263 mm x 196 mm.

[0163] For example, the total thickness of the light panel formed by the substrate 100, the light emitting unit 310, the shielding wall pattern 200, etc. may be 0.27 mm.

[0164] In some examples, as shown in FIGS. 1, 3A, and 5, the light-emitting intensity distribution I of the light-emitting unit 310 satisfies I=I0cosmα, where I0 is the light-emitting intensity distribution perpendicular to the normal direction of the light-emitting surface of the light-emitting unit 310, α is the included angle between the light-emitting direction of the light-emitting unit 310 and the normal, and m=(-ln2) / (lncosα 1 / 2 ), and α 1 / 2 is the angle formed by 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, the light path of the light emitted from the light-emitting unit 310 in the normal direction is h, each light area 300 of at least some of the light areas 300 includes N light-emitting units 310, N≧M, and the distance from the center of the i-th light-emitting unit 310 to the apex angle of the light area 300 is L i where i ranges from 1 to N, and L i , h and N are 0.5≧cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )] ≥ 0.23.

[0165] 3A and 5, when the output light angle θ of the light-emitting unit 310 is small, tanθ≈θ=h / L, and by substituting tanθ≈θ=h / L and α=(π / 2)-θ into the formula cosmα, cosmα=cosm×[(π / 2)-θ]≈cosm×[(π / 2)-(h / L)] is obtained. As a result, the light intensity I1 at the position E1 shown in FIG. 5 is I0×cosm×[(π / 2)-(h / L1)]+I0×cosm×[(π / 2)-(h / L2)]+...+I0×cosm×[(π / 2)-(h / L N )], and the value of N is the number of light-emitting units in the light area. N shown in FIG. 5 may be 4. In this case, 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 )].

[0166] The above relational expression 2 is I1 = I0 × cosm × [(π / 2)-(h / L1)] + I0 × cosm × [(π / 2)-(h / L2)] + ... + I0 × cosm × [(π / 2)-(h / L N )]teeth

number

number

[0167] For example, if the pitch of the light areas 300 is 4.46 mm and the pitch of the light emitting units 310 is 2.23 mm, S=0.254002. The pitch of the light emitting units 310 may refer to the side length of the M-polygon.

[0168] For example, 0.48≧cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )] ≥ 0.25.

[0169] For example, 0.45≧cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )] ≥ 0.27.

[0170] For example, 0.42≧cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )] ≥ 0.28.

[0171] For example, 0.4≧cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )] ≥ 0.3.

[0172] For example, 0.38≧cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )] ≥ 0.32.

[0173] For example, 0.36≧cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )] ≥ 0.35.

[0174] 6 to 9 are schematic diagrams showing distributions of light-emitting units in one light region according to different examples of the embodiment of the present disclosure.

[0175] For example, in the example shown in FIG. 6, at least one light area 300 includes five light-emitting units 311, 312, 313, 314, and 315, and the lines connecting the centers of the four light-emitting units 311, 312, 313, and 314 in sequence form a rectangle, or the five light-emitting units 311, 312, 313, 314, and 315 are arranged in a rectangle, and the included angle between at least one of the first direction and the second direction and at least one side of the rectangle is 0 degrees.

[0176] The four light-emitting units 311, 312, 313 and 314 may be the four light-emitting units located on the outermost sides, or may be the four light-emitting units closest to the apex of the light area.

[0177] For example, as shown in FIG. 6, the light area 300 includes five light-emitting units, 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 where 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.

[0178] For example, 8.3≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5)≧6.5.

[0179] For example, 8.1≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5)≧6.6.

[0180] For example, 8.2≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5)≧6.7.

[0181] For example, 8≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5)≧6.

[0182] For example, 7.9≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5)≧6.9.

[0183] For example, 7.8≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5)≧7.

[0184] For example, 7.7≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5)≧6.8.

[0185] For example, 7.5≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5)≧7.1.

[0186] For example, 7.6≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5)≧7.2.

[0187] For example, 7.4≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5)≧7.3.

[0188] For example, as shown in FIG. 6, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.7 to 2.3. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.65 to 2.25. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.7 to 2.2. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.75 to 2.15. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.8 to 2.1. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.85 to 2.05. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.9 to 2.

[0189] 6, five light-emitting units 311, 312, 313, 314, and 315 may be uniformly arranged. For example, the light-emitting unit 315 may be located at the center of a rectangle made up of the four light-emitting units 311, 312, 313, and 314.

[0190] For example, as shown in FIG. 6, a quadrangle formed by lines sequentially connecting the centers of four light-emitting units 311, 312, 313, and 314 may be a rectangle.

[0191] For example, the rectangle formed by lines sequentially connecting the centers of the four light-emitting units 311, 312, 313, and 314 may be a square.

[0192] For example, the angle formed between two sides of the quadrangle and a first direction is 0 degrees, and the angle formed between two other sides of the quadrangle and a second direction is 0 degrees.

[0193] 6, the shape of the light area 300 may be a first square, and the rectangle formed by lines sequentially connecting the centers of the four light-emitting units 311, 312, 313, and 314 may be a second square, and the included angle between the diagonal of the first square and the diagonal of the second square is 0 degrees. For example, the diagonal of the first square may overlap the diagonal of the second square.

[0194] 6, the pitch of the light regions 300 may be 4.46 mm, the pitch of the light units 310 may be 2.23 mm, and the dimensions of the light units 310 may be 0.22 mm x 0.22 mm. For example, the number of light regions 300 may be 2596, and for example, the number of light regions 300 arranged along one of the first direction and the second direction may be 44, and the number of light regions 300 arranged along the other of the first direction and the second direction may be 59. For example, the installation dimensions of the light regions 300 on the substrate may be 263 mm x 196 mm.

[0195] For example, in the example shown in FIG. 6, parameters such as the dimensions and materials of the shielding wall and the dimensions of the light-emitting unit may be the same as the corresponding parameters in the above example, and detailed descriptions thereof will be omitted here.

[0196] 7, at least one light area 300 includes nine light-emitting units 311, 312, 313, 314, 315, 316, 317, 318, and 319, where lines connecting the centers of the four light-emitting units 311, 312, 313, and 314 sequentially form a rectangle, or the nine light-emitting units 311, 312, 313, 314, 315, 316, 317, 318, and 319 are arranged in a rectangle, and an included angle formed by at least one of the first direction and the second direction and at least one side of the rectangle is 0 degrees. The four light-emitting units 311, 312, 313, and 314 may be the four light-emitting units located on the outermost sides, or may be the four light-emitting units closest to the apex of the light area.

[0197] For example, as shown in FIG. 7, the light area 300 includes nine light-emitting units, 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 where i is in the range of 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.

[0198] 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.

[0199] 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.

[0200] 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.

[0201] For example, 8≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≧6.

[0202] 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.

[0203] For example, 7.8≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≧7.

[0204] 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.

[0205] 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.

[0206] 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.

[0207] 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.

[0208] For example, as shown in FIG. 7, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.7 to 2.3. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.65 to 2.25. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.7 to 2.2. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.75 to 2.15. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.8 to 2.1. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.85 to 2.05. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.9 to 2.

[0209] 7, nine light-emitting units 311, 312, 313, 314, 315, 316, 317, 318, and 319 may be uniformly arranged. For example, light-emitting unit 315 may be located at the center of a rectangle consisting of four light-emitting units 311, 312, 313, and 314.

[0210] For example, as shown in FIG. 7, light-emitting unit 318 may be located between light-emitting unit 311 and light-emitting unit 312, light-emitting unit 319 may be located between light-emitting unit 311 and light-emitting unit 314, light-emitting unit 317 may be located between light-emitting unit 313 and light-emitting unit 314, and light-emitting unit 316 may be located between light-emitting unit 312 and light-emitting unit 313.

[0211] For example, the four sides of the rectangle pass through the centers of the light-emitting units 318, 319, 317, and 316, respectively.

[0212] For example, the centers of the light-emitting units 318, 319, 317, and 316 may be the centers of the four sides of a rectangle, respectively.

[0213] For example, as shown in FIG. 7, a quadrangle formed by lines sequentially connecting the centers of four light-emitting units 311, 312, 313, and 314 may be a rectangle.

[0214] For example, the rectangle formed by lines sequentially connecting the centers of the four light-emitting units 311, 312, 313, and 314 may be a square.

[0215] For example, the angle formed between two sides of the quadrangle and a first direction is 0 degrees, and the angle formed between two other sides of the quadrangle and a second direction is 0 degrees.

[0216] 7, the shape of the light area 300 may be a first square, and the rectangle formed by lines sequentially connecting the centers of the four light-emitting units 311, 312, 313, and 314 may be a second square, and the included angle between the diagonal of the first square and the diagonal of the second square is 0 degrees. For example, the diagonal of the first square may overlap the diagonal of the second square.

[0217] 7, the pitch of the light regions 300 may be 4.46 mm, the pitch of the light units 310 may be 2.23 mm, and the dimensions of the light units 310 may be 0.22 mm x 0.22 mm. For example, the number of light regions 300 may be 2596, and for example, the number of light regions 300 arranged along one of the first direction and the second direction may be 44, and the number of light regions 300 arranged along the other of the first direction and the second direction may be 59. For example, the installation dimensions of the light regions 300 on the substrate may be 263 mm x 196 mm.

[0218] For example, in the example shown in FIG. 7, parameters such as the dimensions and materials of the shielding wall and the dimensions of the light-emitting unit may be the same as the corresponding parameters in the above example, and detailed descriptions thereof will be omitted here.

[0219] 8 , at least one light area 300 includes seven light-emitting units 311, 312, 313, 314, 315, 316, and 317, where lines sequentially connecting the centers of the six light-emitting units 311, 312, 313, 314, 316, and 317 form a hexagon, or the seven light-emitting units 311, 312, 313, 314, 315, 316, and 317 are arranged in a hexagon, and an included angle formed between at least one of the first direction and the second direction and at least one side of the hexagon is 0 degrees. The six light-emitting units 311, 312, 313, 314, 316, and 317 may be the six light-emitting units located on the outermost sides or the six light-emitting units closest to the apex of the light area.

[0220] For example, as shown in FIG. 8, the light area 300 includes seven light-emitting units, 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 where i is in the range of 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.

[0221] For example, 8.3≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7)≧6.5.

[0222] For example, 8.1≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7)≧6.6.

[0223] For example, 8.2≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7)≧6.7.

[0224] For example, 8≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7)≧6.

[0225] For example, 7.9≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7)≧6.9.

[0226] For example, 7.8≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7)≧7.

[0227] For example, 7.7≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7)≧6.8.

[0228] For example, 7.5≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7)≧7.1.

[0229] For example, 7.6≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7)≧7.2.

[0230] For example, 7.4≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7)≧7.3.

[0231] For example, as shown in FIG. 8, the ratio of the pitch of the light area 300 to the side length of the hexagon is 1.7 to 2.3. For example, the ratio of the pitch of the light area 300 to the side length of the hexagon is 1.65 to 2.25. For example, the ratio of the pitch of the light area 300 to the side length of the hexagon is 1.7 to 2.2. For example, the ratio of the pitch of the light area 300 to the side length of the hexagon is 1.75 to 2.15. For example, the ratio of the pitch of the light area 300 to the side length of the hexagon is 1.8 to 2.1. For example, the ratio of the pitch of the light area 300 to the side length of the hexagon is 1.85 to 2.05. For example, the ratio of the pitch of the light area 300 to the side length of the hexagon is 1.9 to 2.

[0232] 8, seven light-emitting units 311, 312, 313, 314, 315, 316, and 317 may be uniformly arranged. For example, light-emitting unit 315 may be located at the center of a hexagon consisting of six light-emitting units 311, 312, 313, 314, 316, and 317.

[0233] For example, as shown in FIG. 8, the hexagon may be a regular hexagon.

[0234] For example, as shown in FIG. 8, the angle formed between two sides of the hexagon and the first direction or the second direction is 0 degrees.

[0235] For example, in the example shown in FIG. 8, parameters such as the dimensions and materials of the shielding wall and the dimensions of the light-emitting unit may be the same as the corresponding parameters in the above example, and detailed descriptions thereof will be omitted here.

[0236] Of course, the embodiments of the present disclosure are not limited thereto, and the number of light-emitting units in the light region may be six, for example, by removing the light-emitting unit 315 located at the center in Fig. 8. The number of light-emitting units in the light region may be set according to the needs of the backlight structure and the display panel.

[0237] 9, at least one light area 300 includes three light-emitting units 311, 312, and 313, and the lines connecting the centers of the three light-emitting units 311, 312, and 313 in sequence form a triangle, and the included 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.

[0238] For example, as shown in FIG. 9, the light area 300 includes three light-emitting units, 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 where i is in the range of 1 to 3, and L i , P and N satisfy 8.5≧P×(1 / L1+1 / L2+1 / L3)≧6.3.

[0239] 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.

[0240] For example, as shown in FIG. 9, the ratio of the pitch of the light area 300 to the side length of the triangle is 1.7 to 2.3. For example, the ratio of the pitch of the light area 300 to the side length of the triangle is 1.65 to 2.25. For example, the ratio of the pitch of the light area 300 to the side length of the triangle is 1.7 to 2.2. For example, the ratio of the pitch of the light area 300 to the side length of the triangle is 1.75 to 2.15. For example, the ratio of the pitch of the light area 300 to the side length of the triangle is 1.8 to 2.1. For example, the ratio of the pitch of the light area 300 to the side length of the triangle is 1.85 to 2.05. For example, the ratio of the pitch of the light area 300 to the side length of the triangle is 1.9 to 2.

[0241] For example, as shown in FIG. 9, three light-emitting units 311, 312 and 313 may be uniformly arranged.

[0242] For example, as shown in FIG. 9, the triangle may be an equilateral triangle.

[0243] For example, as shown in FIG. 9, the angle formed between one side of the triangle and the first direction or the second direction is 0 degrees.

[0244] Of course, the embodiments of the present disclosure are not limited to this, and in a triangle, the included angle between one side and a first direction may be 0 degrees, and the included angle between another side and a second direction may be 0 degrees.

[0245] For example, as shown in FIG. 9, the pitch of the light areas 300 may be 4.8 mm, the pitch of the light emitting units 310 may be 2.6 mm, and the dimensions of the light emitting units 310 may be 0.219 mm×0.219 mm.

[0246] For example, in the example shown in FIG. 9, parameters such as the dimensions and materials of the shielding wall and the dimensions of the light-emitting unit may be the same as the corresponding parameters in the above example, and detailed descriptions thereof will be omitted here.

[0247] 10 is a partial planar structural schematic diagram of a backlight structure according to another embodiment of the present disclosure. As shown in FIG. 10, the backlight structure includes a substrate 100, a shielding wall pattern 200 and a plurality of light-emitting units 310 mounted on the substrate 100. The shielding wall pattern 200 includes a plurality of apertures 210 arranged in an array along a first direction and a second direction, and a shielding wall 220 surrounding each aperture 210. The plurality of apertures 210 are configured to define a plurality of light regions 300, and the first direction intersects with the second direction. The plurality of light-emitting units 310 are arranged in the plurality of light regions 300. The substrate 100 includes an intermediate region 101 and an edge region 102 surrounding the intermediate region 101, and at least three light-emitting units 310 are installed in each light region 300 located at least in the intermediate region 101, and the centers of M light-emitting units 310 among the at least three light-emitting units 310 that are closest to the apex angle of the light region 300 are sequentially connected to form an M-polygon, and the distance between the center of the M-polygon and the center of the light region 300 is less than 10% of the pitch P of the light region 300, and the included angles formed by the first direction and the second direction and each side of the M-polygon are all greater than 0 degrees.

[0248] The backlight structure according to the present disclosure contributes to improving the uniformity of light output in the light area by setting the angles formed by the sides of the M-shaped polygon and the first and second directions.

[0249] For example, one of the first direction and the second direction may be the X direction shown in FIG. 10, and the other of the first direction and the second direction may be the Y direction shown in FIG. 10, and the examples of the present disclosure will be described schematically assuming that the first direction is the X direction and the second direction is the Y direction.

[0250] For example, the first direction is perpendicular to the second direction. For example, the angle formed between the first direction and the second direction may be 80 to 110 degrees, 85 to 100 degrees, or 88 to 92 degrees. The embodiments of the present disclosure are not limited thereto, and the first direction and the second direction are interchangeable.

[0251] For example, as shown in FIG. 10 , the included angles formed between the first and second directions and each side of the M-polygon are all greater than 0.5 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 1 degree. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 2 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 3 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 4 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 5 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 5.5 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 6 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 6.5 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 7 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 8 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 9 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 10 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 10.5 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 11 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 12 degrees.

[0252] For example, as shown in FIG. 10, the angle formed between the first direction and one side of the M-gon may be the same as the angle formed between the second direction and another side of the M-gon.

[0253] Of course, the embodiments of the present disclosure are not limited to this, and the included angle between the first direction and one side of the M-gon may be different from the included angle between the second direction and any one side of the M-gon.

[0254] For example, as shown in FIG. 10, a plurality of openings 210 correspond one-to-one to a plurality of light areas 300, and each opening 210 is for defining one light area 300.

[0255] For example, the number of light emitting units 310 arranged in different light areas 300 may be the same or different.

[0256] For example, the number of light-emitting units 310 arranged in some of the light regions 300 in one region on the substrate 100 may be the same, and the number of light-emitting units 310 arranged in some of the light regions 300 in another region on the substrate 100 may be different. The locations of the one region and the other region may be set according to the needs of the product. For example, the one region may be located in the central region of the substrate and the other region may be located in the edge region of the substrate, or the one region may be located in the edge region of the substrate and the other region may be located in the central region of the substrate, or the one region and the other region may both be located in different edge regions of the substrate.

[0257] For example, as shown in FIG. 10, the intermediate region 101 of the substrate 100 may include at least one light region 300 .

[0258] For example, the intermediate region 101 may include two light regions 300, four light regions 300 or even more light regions 300.

[0259] For example, the edge region 102 includes at least one light region 300 located at the edge, and the at least one light region 300 includes two columns of light regions 300 located on both sides of the intermediate region 101 in a first direction, and two rows of light regions 300 located on both sides of the intermediate region 101 in a second direction.

[0260] 10, the number of light-emitting units 310 installed in each light region 300 located in the middle region 101 and the edge region 102 is the same. However, this is not limited to this, and the number of light regions included in each of the middle region and the edge region, and the number of light-emitting units included in each light region may be set according to the requirements of the product.

[0261] 10, M is equal to or less than the number of light-emitting units 310 installed in each light area 300. For example, the M polygons may be triangles, squares, hexagons, etc., and the embodiments of the present disclosure are not limited thereto.

[0262] For example, as shown in FIG. 10, at least three light-emitting units 310 are installed in each of all the light areas 300 .

[0263] For example, each light area 300 may be provided with three light-emitting units 310, four light-emitting units 310, five light-emitting units 310, or six light-emitting units 310, etc.

[0264] For example, as shown in FIG. 10, the shape of the light area 300 may be a polygon, such as a triangle, a square, or a hexagon.

[0265] The center of the light-emitting unit refers to the geometric center of the light-emitting unit, for example, the orthogonal projection of the geometric center on the substrate overlaps with the center of the two-dimensional plane of the light-emitting unit on the substrate. The line connecting the centers of the M light-emitting units in sequence may refer to a line connecting the centers of the M light-emitting units in a clockwise or counterclockwise direction.

[0266] For example, as shown in FIG. 10, the pitch P of the light areas 300 may be the length of the central connecting lines of adjacent light areas 300 arranged in a first direction, or the length of the central connecting lines of adjacent light areas 300 arranged in a second direction.

[0267] For example, the ratio between the pitch of the write area 300 in the first direction and the pitch of the write area 300 in the second direction may be 0.9 to 1.1, and the two pitches may be equal, for example.

[0268] For example, as shown in FIG. 10 , the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 9.5% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 9% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 8.5% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 8% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 7.5% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 7% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 6.5% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 6% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 5.5% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 5% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 4.5% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 4% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light region 300 is smaller than 3.5% of the pitch P of the light region 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light area 300 is smaller than 3% of the pitch P of the light area 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light area 300 is smaller than 2.5% of the pitch P of the light area 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light area 300 is smaller than 2% of the pitch P of the light area 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light area 300 is smaller than 1.5% of the pitch P of the light area 300. For example, the distance between the center C1 of the M-polygon and the center C2 of the light area 300 is smaller than 1% of the pitch P of the light area 300.For example, the distance between the center C1 of the M-gon and the center C2 of the light area 300 is smaller than 0.5% of the pitch P of the light area 300.

[0269] For example, as shown in FIG. 10, the center C1 of the M-gon overlaps with the center C2 of the light area 300.

[0270] In some examples, as shown in FIG. 10, the ratio of the different side lengths of the M-gon is 0.9 to 1.1, and the ratio of the pitch P of the light area 300 to the side length of the M-gon is 1.7 to 2.3.

[0271] For example, as shown in Figure 10, 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.

[0272] For example, as shown in FIG. 10, the lengths of the sides of an M-gon are equal and are all P'.

[0273] For example, the ratio of the pitch P of the light area 300 to the side length P' of the M-polygon is 1.65 to 2.25. For example, the ratio of the pitch P of the light area 300 to the side length P' of the M-polygon is 1.7 to 2.2. For example, the ratio of the pitch P of the light area 300 to the side length P' of the M-polygon is 1.75 to 2.15. For example, the ratio of the pitch P of the light area 300 to the side length P' of the M-polygon is 1.8 to 2.1. For example, the ratio of the pitch P of the light area 300 to the side length P' of the M-polygon is 1.85 to 2.05. For example, the ratio of the pitch P of the light area 300 to the side length P' of the M-polygon is 1.9 to 2.

[0274] For example, as shown in FIG. 10, the pitch P of the light area 300 is twice the side length P' of the M-gon.

[0275] For example, the light emitting unit 310 shown in FIG. 10 satisfies the Lambert cosine law of the cosine illuminator shown in FIGS. 3A-3B or the Lambert (JH Lambert) illuminator.

[0276] In some examples, the light-emitting unit 310 shown in FIG. 10 includes the light-emitting diode chip 323 shown in FIG. 2A and a packaging structure 324 configured to package the light-emitting diode chip 323, and a gap is provided between the packaging structures 324 of adjacent light-emitting units 310.

[0277] For example, the light-emitting diode chip 323 may be a submillimeter light-emitting diode chip (miniLED), and the dimension of the unpackaged light-emitting diode chip 323 in a direction perpendicular to the substrate 100 may be 70 micrometers to 180 micrometers, and the maximum dimension of the unpackaged light-emitting diode chip 323 in a direction parallel to the substrate 100 is 500 micrometers or less.

[0278] For example, the light emitting unit 310 is a packaged light emitting diode chip, and the maximum dimension and thickness of the packaged light emitting diode chip 323 in the direction parallel to the substrate 100 are both larger than the corresponding parameters of the unpackaged light emitting diode chip 323.

[0279] For example, as shown in FIG. 2A, a single light emitting diode chip 323 may be packaged as an independent device to form a light emitting unit 310, which is then placed in a corresponding position in the backlight structure and fixedly connected to a pad on the substrate 100.

[0280] Since the unpackaged light emitting diode chip may be regarded as a Lambertian emitter, after the light emitting diode chip is packaged, the light output angle range is +α 1 / 2 ~-α 1 / 2 The light inside can be emitted, but +α 1 / 2 ~-α 1 / 2 The light other than the above is basically limited to the independent device by total reflection. At this time, the included angle θ between the light emitted from the light emitting unit 310 at the outermost edge and the substrate 100 is α 1 / 2 It may also be the complementary angle of

[0281] For example, as shown in FIG. 2A, a light emitting unit 310 or a light emitting diode chip 323 is connected to a pad 321 on the substrate 100 by a welding metal 322 .

[0282] For example, the weld metal 322 may include solder.

[0283] For example, as shown in FIG. 2A, a package structure 324 may be doped with a color conversion material 325.

[0284] For example, the color conversion material 325 may include a phosphor material or a quantum dot material.

[0285] For example, color conversion material 325 may include a material that converts blue light to white light.

[0286] For example, the color conversion material 325 may include a material that converts blue light into red and green light. Of course, the color conversion material does not have to be doped into the package structure.

[0287] For example, as shown in FIG. 2A, the light emitting diode chip 323 may be placed at a corresponding position on the substrate 100 and then packaged.

[0288] For example, each LED chip may be packaged with a transparent material, such as transparent silica gel, by screen printing or dot printing to form a package structure 324. Depending on the shape of the package structure 324, the light emission angle of the LED chip 323 may be modulated to change the light emission angle of the light emitting unit 310.

[0289] For example, as shown in FIG. 2A, the surface of the package structure 324 facing away from the substrate 100 may be curved, and the light emitted from the light emitting unit 310 at the most peripheral portion may have an output angle of α 1 / 2 Slightly larger than α 1 / 2When the value range of is 40° to 65°, the value range of the light exit angle of the light emitted from the light emitting unit 310 at the outermost edge may be 50° to 70°.

[0290] For example, the package structure 324 may have any necessary dimensions in a direction perpendicular to the substrate 100. For example, the dimension of the package structure 324 in a direction perpendicular to the substrate 100 may be less than 0.5 millimeters. For example, the dimension of the package structure 324 in a direction perpendicular to the substrate 100 may be between 0.1 and 0.4 millimeters. For example, the dimension of the package structure 324 in a direction perpendicular to the substrate 100 may be between 0.2 and 0.4 millimeters. For example, the dimension of the package structure 324 in a direction perpendicular to the substrate 100 may be less than 0.3 millimeters. For example, the dimension of the package structure 324 in a direction perpendicular to the substrate 100 may be between 0.25 and 0.35 millimeters. For example, the dimension of the package structure 324 in a direction perpendicular to the substrate 100 may be between 0.15 and 0.25 millimeters. For example, the dimension of the package structure 324 in a direction perpendicular to the substrate 100 may be approximately 0.2 millimeters. For example, the dimension of the package structure 324 in a direction perpendicular to the substrate 100 may be approximately 0.3 millimeters.

[0291] For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 may 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 may 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 may 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 may 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 may be greater than 0.5 mm. For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 may be greater than 1.0 mm. For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 may be greater than 2.0 mm. For example, the maximum dimension of the package structure 324 in the direction parallel to the substrate 100 may be smaller than 2.0 mm.

[0292] For example, after being packaged as an independent device, the geometric center of the orthogonal projection of the light-emitting diode chip on the base substrate may overlap with the geometric center of the orthogonal projection of the independent device on the base substrate, but is not limited to this. The geometric center of the orthogonal projection of the light-emitting diode chip on the base substrate may be offset from the geometric center of the orthogonal projection of the independent device on the base substrate, and the height of the light-emitting unit 310 in a direction perpendicular to the substrate 100 is the height of the packaged light-emitting diode chip.

[0293] For example, the maximum dimension of each light-emitting unit 310 in a direction perpendicular to the substrate 100 is 2 millimeters or less.

[0294] For example, as shown in FIG. 10 , the dimension of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is 200 micrometers or less. For example, the dimension of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is 180 micrometers or less. For example, the dimension of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is 160 micrometers or less. For example, the dimension of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is 150 micrometers or less. For example, the dimension of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is 140 micrometers or less. For example, the dimension of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is 130 micrometers or less. For example, the dimension of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is 120 micrometers or less. For example, the dimension of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is 110 micrometers or less. For example, the dimension of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is 100 micrometers or less. The dimension of the light-emitting unit 310 in the direction perpendicular to the substrate 100 is the height of the light-emitting unit 310.

[0295] In some examples, as shown in FIG. 2A, the height of the light-emitting unit 310 is 50 to 100 micrometers.

[0296] In some examples, as shown in FIG. 2A, the height of the light-emitting unit 310 is 80 to 100 micrometers.

[0297] For example, the height of the light-emitting unit 310 is 55 to 95 micrometers. For example, the height of the light-emitting unit 310 is 60 to 90 micrometers. For example, the height of the light-emitting unit 310 is 70 to 85 micrometers. For example, the height of the light-emitting unit 310 is 75 to 80 micrometers.

[0298] For example, as shown in FIG. 10, the maximum dimension of the light emitting unit 310 in the direction parallel to the substrate 100 is 3 mm or less.

[0299] 10 , the maximum dimension of the light-emitting unit 310 in the direction parallel to the substrate 100 is 500 micrometers or less. For example, the maximum dimension of the light-emitting unit 310 in the direction parallel to the substrate 100 is 450 micrometers or less. For example, the maximum dimension of the light-emitting unit 310 in the direction parallel to the substrate 100 is 400 micrometers or less. For example, the maximum dimension of the light-emitting unit 310 in the direction parallel to the substrate 100 is 350 micrometers or less. For example, the maximum dimension of the light-emitting unit 310 in the direction parallel to the substrate 100 is 330 micrometers or less. For example, the maximum dimension of the light-emitting unit 310 in the direction parallel to the substrate 100 is 300 micrometers or less. For example, the maximum dimension of the light-emitting unit 310 in the direction parallel to the substrate 100 is 280 micrometers or less.

[0300] 10 , the dimension of the light-emitting unit 310 in at least one of the first and second directions is 250 micrometers or less. For example, the dimension of the light-emitting unit 310 in at least one of the first and second directions is 240 micrometers or less. For example, the dimension of the light-emitting unit 310 in at least one of the first and second directions is 230 micrometers or less. For example, the dimension of the light-emitting unit 310 in at least one of the first and second directions is 220 micrometers or less. For example, the dimensions of the light-emitting unit 310 in both the first and second directions are 219 micrometers.

[0301] The shape of the light-emitting unit may refer to the shape of the light-emitting unit as orthogonally projected onto the substrate.

[0302] For example, the shape of the light-emitting unit may be a quadrangle, such as a rectangle, and the maximum dimension of the light-emitting unit in a direction parallel to the substrate may be the length of the diagonal of the rectangle.

[0303] For example, the shape of the light-emitting unit may be elliptical, and the maximum dimension of the light-emitting unit in a direction parallel to the substrate may be the length of the major axis of the ellipse.

[0304] For example, the shape of the light-emitting unit may be circular, and the largest dimension of the light-emitting unit in a direction parallel to the substrate may be its diameter.

[0305] Of course, the embodiments of the present disclosure are not limited thereto, and the light-emitting unit in the example shown in FIG. 10 may include only an unpackaged light-emitting diode chip 323 as shown in FIG. 2B , where the maximum dimension of the unpackaged light-emitting diode chip 323 in the direction parallel to the substrate 100 is 500 micrometers or less.

[0306] FIG. 11 is a schematic partial cross-sectional view of a structure taken along line BB' shown in FIG. 10 according to an example of the embodiment of the present disclosure.

[0307] In some examples, as shown in FIG. 11, the thickness of the shielding wall 220 is greater than the height of the light-emitting unit 310 in a direction perpendicular to the substrate 100 .

[0308] 11, the thickness of the shielding wall 220 is 200 to 400 micrometers, and the height of the light-emitting unit 310 is 50 to 100 micrometers. The thickness of the shielding wall 220 refers to the dimension of the shielding wall 220 in a direction perpendicular to the substrate 100.

[0309] In some examples, as shown in FIG. 11, the thickness of the shielding wall 220 is 250 to 270 micrometers.

[0310] For example, the thickness of the shielding wall 220 may be 210 to 390 micrometers. For example, the thickness of the shielding wall 220 may be 220 to 370 micrometers. For example, the thickness of the shielding wall 220 may be 230 to 350 micrometers. For example, the thickness of the shielding wall 220 may be 235 to 320 micrometers. For example, the thickness of the shielding wall 220 may be 240 to 300 micrometers. For example, the thickness of the shielding wall 220 may be 245 to 280 micrometers.

[0311] In some examples, the width of the shielding wall 220 is 350 to 500 micrometers, as shown in Fig. 11. The width of the shielding wall 220 refers to the dimension in the first direction of the shielding wall 220 between two adjacent light areas 300 in the first direction, or the dimension in the second direction of the shielding wall 220 between two adjacent light areas 300 in the second direction.

[0312] For example, as shown in FIG. 11 , the width of the shielding wall 220 is 370 to 480 micrometers. For example, the width of the shielding wall 220 may be 350 to 450 micrometers. For example, the width of the shielding wall 220 may be 360 ​​to 440 micrometers. For example, the width of the shielding wall 220 may be 370 to 430 micrometers. For example, the width of the shielding wall 220 may be 380 to 420 micrometers. For example, the width of the shielding wall 220 may be 390 to 410 micrometers. For example, the width of the shielding wall 220 may be 400 micrometers.

[0313] In some examples, the shielding wall 220 includes a light-shielding material, as shown in Figure 11. For example, the material of the shielding wall 220 may include a black resin.

[0314] In some examples, the light-emitting units 310 installed in each light area 300 are electrically connected, as shown in Fig. 10. For example, the light-emitting units 310 in each light area 300 are connected in series. For example, the light-emitting units 310 in each light area 300 are connected in parallel.

[0315] In the backlight structure according to the present disclosure, by surrounding each light area with a light-blocking shielding wall, the probability of crosstalk occurring in the light between different light areas is reduced, thereby contributing to improving the halation phenomenon.

[0316] In some examples, as shown in FIG. 10, the shape of at least some of the light areas 300 includes a rectangle, and two adjacent sides of the rectangle extend along the first direction and the second direction, respectively.

[0317] For example, all the light areas 300 have a rectangular shape. For example, the different light areas 300 have the same shape and dimensions.

[0318] Of course, the embodiments of the present disclosure are not limited thereto, and according to the needs of the product, the substrate may be divided into multiple regions, and the dimensions of the light areas in different regions may be different, or the dimensions of the light areas in the same region may be the same.

[0319] Fig. 12 is a schematic diagram of light-emitting units in one light region shown in Fig. 10. The example shown in Fig. 12 schematically shows a case where one light region includes four light-emitting units and the M-shaped polygon is a rectangle.

[0320] For example, as shown in FIG. 12, the shape of one light area 300 may be a square, or the M-shaped polygon formed by the central connecting lines of the four light-emitting units 310 located in the light area 300 may be a square.

[0321] For example, as shown in FIG. 12, the light intensity I1 of the region E1 can be calculated by the relation I1=I0×m×h×(1 / L1+1 / L2+...+1 / L2) based on the calculation method shown in FIG. N ) can be obtained, and the value of N is the number of light-emitting units in the light area, and N shown in FIG. 12 may be 4.

[0322] In some examples, as shown in FIGS. 10 and 12, the above relationship I1=I0×m×h×(1 / L1+1 / L2+...+1 / L N ) are regarded as constants, each light area 300 of at least some of the 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 where i ranges from 1 to N, and L i , P and N are 8.5 ≧ P × (1 / L1 + 1 / L2 + … + 1 / L N ) ≧ 6.3. Here, P×(1 / L1 + 1 / L2 + … + 1 / L N ) may be taken as an approximate measure of the unitless relative light intensity at the edge position.

[0323] 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.

[0324] The apex angle of the light area may refer to the E1 area shown in FIG.

[0325] For example, as shown in FIG. 12, the light area 300 includes four light-emitting units, the distance from the center of the i-th light-emitting unit 310 to the apex angle of the light area 300 is Li, the value range of i is 1 to 4, and Li, P, and N satisfy 8.5≧P×(1 / L1+1 / L2+1 / L3+1 / L4)≧6.3.

[0326] For example, as shown in FIG. 12, if the pitch of the write area 300 is 4.46 mm and the side length of the rectangle is 2.23 mm, the value of L1 is 1.123379 micrometers, the value of L2 is 3.363531 micrometers, the value of L3 is 4.149638 micrometers, and the value of L4 is 2.669986 micrometers. The above parameter values ​​are calculated by multiplying the value of each parameter by P×(1 / L1+1 / L2+...+1 / L N ) and substitute P×(1 / L1+1 / L2+…+1 / L N )=8.04.

[0327] For example, as shown in Figures 10 and 12, the four light-emitting units 310 included in the light area 300 form a rectangle, and the included angle between one of the first direction and the second direction and at least one side of the rectangle is 12 degrees.

[0328] For example, as shown in FIG. 12, the shape of the light area 300 is a first square, and the lines sequentially connecting the centers of the four light-emitting units 310 included in the light area 300 form a second square, and the angle formed by the diagonal of the first square and the diagonal of the second square is 12 degrees.

[0329] An embodiment of the present disclosure rotates an M-shaped polygon consisting of light-emitting units in a light area so that none of the sides of the M-shaped polygon are parallel to the first direction or the second direction, thereby improving the light intensity in the edge region of the light area.

[0330] In some examples, as shown in FIG. 12, the ratio of the light intensity at an edge position of the light area 300, for example, the E1 area, to the light intensity at the center position of the light area 300 is 0.5 or more.

[0331] For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.55 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.6 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.65 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.7 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.75 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.8 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.85 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.9 or more.

[0332] For example, as shown in FIGS. 10 and 12, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.7 to 2.3. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.65 to 2.25. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.7 to 2.2. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.75 to 2.15. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.8 to 2.1. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.85 to 2.05. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.9 to 2.

[0333] In some examples, as shown in FIGS. 10 and 12, the shape of at least some of the light areas 300 includes a rectangle, and two adjacent sides of the rectangle extend along the first direction and the second direction, respectively.

[0334] For example, each light area 300 has a rectangular shape.

[0335] For example, at least some of the light areas 300 are square in shape.

[0336] In some examples, as shown in FIGS. 10, 3A, and 12, the light-emitting intensity distribution I of the light-emitting unit 310 satisfies I=I0cosmα, where I0 is the light-emitting intensity distribution perpendicular to the normal direction of the light-emitting surface of the light-emitting unit 310, α is the included angle between the light-emitting direction of the light-emitting unit 310 and the normal, and m=(-ln2) / (lncosα 1 / 2 ), and α 1 / 2 is the angle formed by 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, the light path of the light emitted from the light-emitting unit 310 in the normal direction is h, each light area 300 of at least some of the light areas 300 includes N light-emitting units 310, N≧M, and the distance from the center of the i-th light-emitting unit 310 to the apex angle of the light area 300 is L i where i ranges from 1 to N, and L i , h and N are 0.5≧cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )] ≥ 0.23.

[0337] 10 and 12, when the output light angle θ of the light-emitting unit 310 is small, tanθ≈θ=h / L, and by substituting tanθ≈θ=h / L and α=(π / 2)-θ into the formula cosmα, cosmα=cosm×[(π / 2)-θ]≈cosm×[(π / 2)-(h / L)] is obtained. As a result, the light intensity I1 at the position E1 shown in FIG. 12 is I0×cosm×[(π / 2)-(h / L1)]+I0×cosm×[(π / 2)-(h / L2)]+...+I0×cosm×[(π / 2)-(h / L N)], and the value of N is the number of light-emitting units in the light area. N shown in FIG. 12 may be 4. In this case, 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 )].

[0338] The above relational expression 2 is I1 = I0 × cosm × [(π / 2)-(h / L1)] + I0 × cosm × [(π / 2)-(h / L2)] + ... + I0 × cosm × [(π / 2)-(h / L N )] may be shown as I1 = I0 × S, where m is approximately equal to 1.

[0339] For example, if the pitch of the light areas 300 is 4.46 mm and the pitch of the light emitting units 310 is 2.23 mm, then S=0.285151.

[0340] For example, 0.48≧cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )] ≥ 0.25.

[0341] For example, 0.45≧cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )] ≥ 0.27.

[0342] For example, 0.42≧cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )] ≥ 0.28.

[0343] For example, 0.4≧cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )] ≥ 0.3.

[0344] For example, 0.38≧cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )] ≥ 0.32.

[0345] For example, 0.36≧cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+…+cosm×[(π / 2)-(h / L N )] ≥ 0.35.

[0346] In another example of an embodiment of the present disclosure, the included angle between the sides of the M-shaped polygon shown in FIG. 12 and the first and second directions is not changed, for example, the included angle is set to 12 degrees, and only the pitch of the light area 300 shown in FIG. 12 and the side length of the M-shaped polygon consisting of the light-emitting units 310 are adjusted, for example, the pitch of the light area 300 is adjusted to 5.12 millimeters and the side length of the M-shaped polygon is adjusted to 2.56 micrometers, and the value of L1 becomes 1.162167 micrometers, the value of L2 becomes 4.156017 micrometers, the value of L3 becomes 5.113352 micrometers, and the value of L4 becomes 3.43394 micrometers.

[0347] For example, the above parameter values ​​are expressed as P × (1 / L1 + 1 / L2 + ... + 1 / L N ) and substitute P×(1 / L1+1 / L2+…+1 / L N )=8.13.

[0348] For example, the above parameter values ​​are expressed as S=cosm×[(π / 2)-(h / L1)]+cosm×[(π / 2)-(h / L2)]+...+cosm×[(π / 2)-(h / L N )] to get S=0.323765.

[0349] The backlight structure according to the embodiment of the present disclosure contributes to further improving the light intensity in the edge region of the light area by rotating the M-shaped polygon consisting of light-emitting units in the light area and adjusting the pitch of the light area and the side length of the M-shaped polygon.

[0350] Figures 13A to 13G are schematic diagrams of one light area according to another example of an embodiment of the present disclosure, and Figure 14 is a relationship diagram of the relative light intensity at the edge positions of the light area after rotating the M-gon in the light area shown in Figures 13A to 13G by different angles.

[0351] The relative light intensity shown in FIG. 14 may refer to the value of Q at the edge position of the light area, where Q=P×(1 / L1+1 / L2+...+1 / L N )

[0352] In the embodiments of the present disclosure, rotating an M-polygon by different angles may mean rotating the M-polygon by a certain angle around a certain area where the center of the M-polygon is located, for example, rotating a square by a certain angle around a certain area where the center of the square is located.

[0353] The rotation may refer to rotating the M-gon clockwise, or may refer to rotating the M-gon counterclockwise.

[0354] The differences between the light area shown in FIGS. 13A to 13G and the light area shown in FIG. 12 include the angles formed by the sides of the M-gon and the first and second directions.

[0355] For example, the angle formed by the side M1 of the M-gon M01 shown in FIG. 13A and the first direction may be 5 degrees, the angle formed by the side M1 of the M-gon M02 shown in FIG. 13B and the first direction may be 10 degrees, the angle formed by the side M1 of the M-gon M03 shown in FIG. 13C and the first direction may be 13 degrees, the angle formed by the side M1 of the M-gon M04 shown in FIG. 13D and the first direction may be 15 degrees, the angle formed by the side M1 of the M-gon M05 shown in FIG. 13E and the first direction may be 17 degrees, the angle formed by the side M1 of the M-gon M06 shown in FIG. 13F and the first direction may be 20 degrees, and the angle formed by the side M1 of the M-gon M07 shown in FIG. 13G and the first direction may be 30 degrees.

[0356] For example, the angle formed by the diagonal 392 of the second square M01 and the diagonal 391 of the first square shown in FIG. 13A may be 5 degrees, the angle formed by the diagonal 392 of the second square M02 and the diagonal 391 of the first square shown in FIG. 13B may be 10 degrees, the angle formed by the diagonal 392 of the second square M03 and the diagonal 391 of the first square shown in FIG. 13C may be 13 degrees, and the angle formed by the diagonal 392 of the second square M04 and the diagonal 391 of the first square shown in FIG. 13D may be 14 degrees. The angle formed by the diagonal 391 of one square may be 15 degrees, the angle formed by the diagonal 392 of the second square M05 shown in Figure 13E and the diagonal 391 of the first square may be 17 degrees, the angle formed by the diagonal 392 of the second square M06 shown in Figure 13F and the diagonal 391 of the first square may be 20 degrees, and the angle formed by the diagonal 392 of the second square M07 shown in Figure 13G and the diagonal 391 of the first square may be 30 degrees.

[0357] Of course, the embodiments of the present disclosure are not limited to rotating the M-gon by the above degrees, and the rotation degrees of the M-gon may be selected according to the needs of the product.

[0358] In some examples, as shown in Figures 13A to 13G and 14, each light area 300 of at least some of the light areas 300 includes at least four light-emitting units 310, and the at least four light-emitting units 310 are arranged in an M-shaped polygon, and the included angle between one of the first direction and the second direction and at least one side of the M-shaped polygon is 12 to 18 degrees.

[0359] In some examples, as shown in Figures 13A to 13G and 14, the shape of each light area 300 of at least some of the light areas 300 is a first square, each light area 300 of at least some of the light areas 300 includes at least four light-emitting units 310, and lines sequentially connecting the centers of four light-emitting units 310 that are closest to the four vertex corners of the light area 300 form a second square, and the included angle between the diagonal of the first square and the diagonal of the second square is 12 to 18 degrees.

[0360] For example, as shown in Figures 13A to 13G and 14, each light area 300 of at least some of the light areas 300 includes four light-emitting units 311, 312, 313 and 314, and the four light-emitting units 311, 312, 313 and 314 are arranged in a quadrangle, and the included angle between one of the first direction and the second direction and at least one side of the quadrangle is 12 to 18 degrees.

[0361] 13A to 13G, the shape of the light area 300 is a first square, and the lines sequentially connecting the centers of four light-emitting units 310 included in the light area 300 form a second square, and the angle formed by the diagonal of the first square and the diagonal of the second square may be 5 degrees, 10 degrees, 13 degrees, 15 degrees, 17 degrees, 20 degrees, or 30 degrees. Of course, in the embodiments of the present disclosure, the angle formed by the diagonal of the first square and the diagonal of the second square is not limited to the above degrees, and the angle formed by the diagonal of the first square and the diagonal of the second square may be selected according to product needs.

[0362] For example, as shown in FIGS. 13A to 13G, the ratio of the pitch of the light areas 300 to the side length of the second squares is 1.7 to 2.3. For example, the ratio of the pitch of the light areas 300 to the side length of the second squares is 1.65 to 2.25. For example, the ratio of the pitch of the light areas 300 to the side length of the second squares is 1.7 to 2.2. For example, the ratio of the pitch of the light areas 300 to the side length of the second squares is 1.75 to 2.15. For example, the ratio of the pitch of the light areas 300 to the side length of the second squares is 1.8 to 2.1. For example, the ratio of the pitch of the light areas 300 to the side length of the second squares is 1.85 to 2.05. For example, the ratio of the pitch of the light areas 300 to the side length of the second squares is 1.9 to 2.

[0363] For example, as shown in FIGS. 13A to 13G, the light intensity at the edge of the light area 300, for example, at a corner area, is expressed as I1=I0×m×h×(1 / L1+1 / L2+...+1 / L N ) is satisfied, and the distance from the center of the i-th light-emitting unit 310 to the apex angle of the light area 300 is L iand the pitch P of the light area 300 and the number N of the light emitting units 310 are 8.5≧P×(1 / L1+1 / L2+...+1 / L N ) ≥ 6.3.

[0364] For example, as shown in FIGS. 13A to 13G, Q=P×(1 / L1+1 / L2+1 / L3+1 / L4), and 8.5≧Q≧6.3.

[0365] For example, as shown in FIGS. 13A to 13G, the dimensions of the light-emitting unit 310 may be 0.219 mm×0.219 mm.

[0366] For example, as shown in FIGS. 13A to 13G and 14, taking the case where the pitch of the light areas 300 is 4.8 mm, the pitch of the light emitting units 310 is 2.6 mm, and the side length of the M-shaped polygon is 2.6 mm as an example, when the included angle formed by the side M1 of the second square and the first direction, i.e., the included angle formed by the diagonal of the first square and the diagonal of the second square, is 0 degrees, Q=6.521148; when the included angle formed by the side M1 of the second square and the first direction is 5 degrees, Q=6.386526; and when the included angle formed by the side M1 of the second square and the first direction is 10 degrees, Q=6.386526. When the included angle between the side M1 of the second square and the first direction is 13 degrees, Q=6.409105, when the included angle between the side M1 of the second square and the first direction is 15 degrees, Q=6.677322, when the included angle between the side M1 of the second square and the first direction is 17 degrees, Q=6.325694, when the included angle between the side M1 of the second square and the first direction is 20 degrees, Q=6.161672, and when the included angle between the side M1 of the second square and the first direction is 30 degrees, Q=6.117308. Thus, after rotating the M-shaped polygon by different angles, the magnitude of the relative light intensity at the edge positions of the light area increases and then decreases as the angle increases.

[0367] For example, as shown in FIG. 14, when the rotation angle of the M-gon, eg, the second square, is 12 to 18 degrees, the value of the relative light intensity Q at the edge position of the light area is relatively large.

[0368] The backlight structure according to the embodiment of the present disclosure contributes to improving the light intensity at the edge of the light area by adjusting the angle of the M-gon formed by arranging the light-emitting units in the light area within a certain range, for example, 12 to 18 degrees, and by setting the pitch of the light area and the side length of the M-gon, thereby improving the light output uniformity of the light area.

[0369] For example, the angle formed by the diagonal of the first square and the diagonal of the second square is 13 to 17 degrees. For example, the angle formed by the diagonal of the first square and the diagonal of the second square is 14.5 to 16.5 degrees. For example, the angle formed by the diagonal of the first square and the diagonal of the second square is 15 to 16 degrees.

[0370] For example, as shown in FIGS. 13A to 13G, the ratio of the light intensity at the edge position of the light area 300, for example, the apex angle area, to the light intensity at the center position of the light area 300 is 0.5 or more.

[0371] For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.55 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.6 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.65 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.7 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.75 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.8 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.85 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.9 or more.

[0372] Figures 15A to 15G are schematic diagrams of one light area according to another example of an embodiment of the present disclosure, and Figure 16 is a relationship diagram of the relative light intensity at the edge positions of the light area after rotating the M-gon in the light area shown in Figures 15A to 15G by different angles.

[0373] For example, the angle formed by the side M1 of the M-gon M11 shown in FIG. 15A and the first direction may be 5 degrees, the angle formed by the side M1 of the M-gon M12 shown in FIG. 15B and the first direction may be 10 degrees, the angle formed by the side M1 of the M-gon M13 shown in FIG. 15C and the first direction may be 13 degrees, the angle formed by the side M1 of the M-gon M14 shown in FIG. 15D and the first direction may be 15 degrees, the angle formed by the side M1 of the M-gon M15 shown in FIG. 15E and the first direction may be 17 degrees, the angle formed by the side M1 of the M-gon M16 shown in FIG. 15F and the first direction may be 20 degrees, and the angle formed by the side M1 of the M-gon M17 shown in FIG. 15G and the first direction may be 30 degrees.

[0374] For example, the angle formed by the diagonal 392 of the second square M11 and the diagonal 391 of the first square shown in FIG. 15A may be 5 degrees, the angle formed by the diagonal 392 of the second square M12 and the diagonal 391 of the first square shown in FIG. 15B may be 10 degrees, the angle formed by the diagonal 392 of the second square M13 and the diagonal 391 of the first square shown in FIG. 15C may be 13 degrees, and the angle formed by the diagonal 392 of the second square M14 and the diagonal 391 of the first square shown in FIG. 15D may be 14 degrees. The angle formed by the diagonal 391 of one square may be 15 degrees, the angle formed by the diagonal 392 of the second square M15 shown in Figure 15E and the diagonal 391 of the first square may be 17 degrees, the angle formed by the diagonal 392 of the second square M16 shown in Figure 15F and the diagonal 391 of the first square may be 20 degrees, and the angle formed by the diagonal 392 of the second square M17 shown in Figure 15G and the diagonal 391 of the first square may be 30 degrees.

[0375] The relative light intensities shown in FIGS. 15A to 15G may refer to the value of Q at the edge position of the light area, where Q=P×(1 / L1+1 / L2+...+1 / L N )

[0376] In the embodiments of the present disclosure, rotating an M-polygon by different angles may mean rotating the M-polygon by a certain angle around a certain area where the center of the M-polygon is located, for example, rotating a square by a certain angle around a certain area where the center of the square is located.

[0377] The rotation may refer to rotating the M-gon clockwise, or may refer to rotating the M-gon counterclockwise.

[0378] The differences between the light areas shown in Figures 15A to 15G and those shown in Figures 13A to 13G include the number of light-emitting units included in the light areas; as shown in Figures 15A to 15G, the light area 300 may include five light-emitting units 310, for example, Q = P × (1 / L1 + 1 / L2 + 1 / L3 + 1 / L4 + 1 / L5).

[0379] In some examples, as shown in Figures 15A to 15G and 16, each light area 300 of at least some of the light areas 300 includes at least four light-emitting units 310, and the at least four light-emitting units 310 are arranged in an M-shaped polygon, and the included angle between one of the first direction and the second direction and at least one side of the M-shaped polygon is 12 to 18 degrees.

[0380] In some examples, as shown in Figures 15A to 15G and 16, the shape of each light area 300 of at least some of the light areas 300 is a first square, each light area 300 of at least some of the light areas 300 includes at least four light-emitting units 310, and lines sequentially connecting the centers of four light-emitting units 310 that are closest to the four vertex corners of the light area 300 form a second square, and the included angle between the diagonal of the first square and the diagonal of the second square is 12 to 18 degrees.

[0381] For example, the rectangle formed by arranging four light-emitting units 310 shown in Figures 13A to 13G may have the same shape and size as the rectangle formed by arranging five light-emitting units 310 shown in Figures 15A to 15G, but this is not limited to this, and at least one of the two parameters of both the shape and size may be different.

[0382] In some examples, as shown in Figures 15A to 15G, the at least four light-emitting units 310 include five light-emitting units 310, and lines sequentially connecting the centers of the four light-emitting units 310 located at the outermost edges of the five light-emitting units 310 form a second square.

[0383] For example, as shown in Figures 15A to 15G, each light area 300 of at least some of the light areas 300 includes five light-emitting units 311, 312, 313, 314, and 315, and the five light-emitting units 311, 312, 313, 314, and 315 are arranged in a quadrangle, and the included angle between one of the first direction and the second direction and at least one side of the quadrangle is 12 to 18 degrees.

[0384] For example, as shown in FIGS. 15A to 15G, four light-emitting units 311, 312, 313, and 314 are arranged in a square, and a light-emitting unit 315 is located at the center of the four light-emitting units 311, 312, 313, and 314.

[0385] 15A to 15G and 16, the shape of the light area 300 is a first square, and lines sequentially connecting the centers of the four outermost light-emitting units 310 among the five light-emitting units 310 included in the light area 300 form a second square, and the included angle formed by the diagonal of the first square and the diagonal of the second square may be 5 degrees, 10 degrees, 13 degrees, 15 degrees, 17 degrees, 20 degrees, or 30 degrees. Of course, in the embodiments of the present disclosure, the included angle formed by the diagonal of the first square and the diagonal of the second square is not limited to the above degrees, and the included angle formed by the diagonal of the first square and the diagonal of the second square may be selected according to product needs.

[0386] For example, as shown in FIGS. 15A to 15G, the ratio of the pitch of the light areas 300 to the side length of the second squares is 1.7 to 2.3. For example, the ratio of the pitch of the light areas 300 to the side length of the second squares is 1.65 to 2.25. For example, the ratio of the pitch of the light areas 300 to the side length of the second squares is 1.7 to 2.2. For example, the ratio of the pitch of the light areas 300 to the side length of the second squares is 1.75 to 2.15. For example, the ratio of the pitch of the light areas 300 to the side length of the second squares is 1.8 to 2.1. For example, the ratio of the pitch of the light areas 300 to the side length of the second squares is 1.85 to 2.05. For example, the ratio of the pitch of the light areas 300 to the side length of the second squares is 1.9 to 2.

[0387] For example, as shown in FIGS. 15A to 15G, the light intensity at the edge of the light area 300, for example, at a corner area, is expressed as I1=I0×m×h×(1 / L1+1 / L2+...+1 / L N ) is satisfied, and the distance from the center of the i-th light-emitting unit 310 to the apex angle of the light area 300 is L i and the pitch P of the light area 300 and the number N of the light emitting units 310 are 8.5≧P×(1 / L1+1 / L2+...+1 / L N ) ≥ 6.3.

[0388] For example, as shown in FIGS. 15A to 15G, Q=P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5), and 8.5≧Q≧6.3.

[0389] For example, as shown in FIGS. 15A to 15G, the dimensions of the light-emitting unit 310 may be 0.219 mm×0.219 mm.

[0390] For example, as shown in FIGS. 15A to 15G and 16, when the pitch of the light areas 300 is 4.8 mm, the pitch of the light emitting units 310 is 2.6 mm, and the side length of the M-shaped polygon is 2.6 mm, if the included angle formed by the side M1 of the second square and the first direction, i.e., the included angle formed by the diagonal of the first square and the diagonal of the second square, is 0 degrees, Q=7.935362; if the included angle formed by the side M1 of the second square and the first direction is 5 degrees, Q=7.80074; and if the included angle formed by the side M1 of the second square and the first direction is 10 degrees, Q=7.80074. When the included angle between the side M1 of the second square and the first direction is 13 degrees, Q=7.823319, when the included angle between the side M1 of the second square and the first direction is 15 degrees, Q=8.091537, when the included angle between the side M1 of the second square and the first direction is 17 degrees, Q=7.739908, when the included angle between the side M1 of the second square and the first direction is 20 degrees, Q=7.575887, when the included angle between the side M1 of the second square and the first direction is 30 degrees, Q=7.531522. Thus, after rotating the M-shaped polygon by different angles, the magnitude of the relative light intensity at the edge positions of the light area increases and then decreases as the angle increases.

[0391] For example, as shown in FIG. 16, when the rotation angle of the M-gon, eg, the second square, is 12 to 18 degrees, the value of the relative light intensity Q at the edge position of the light area is relatively large.

[0392] The backlight structure according to the embodiment of the present disclosure contributes to improving the light intensity at the edge of the light area by adjusting the angle of the M-gon formed by arranging the light-emitting units in the light area to a certain range, for example, 12 to 18 degrees, and by setting the number of light-emitting units in the light area, the pitch of the light area, and the side length of the M-gon, thereby improving the light output uniformity of the light area.

[0393] For example, as shown in Figures 14 and 16, when the number of light-emitting units 310 installed in the light area 300 is five, the light intensity at the edge position of the light area 300, for example, the apex angle position, is greater than the light intensity at the edge position of the light area 300 when the number of light-emitting units 310 in the light area 300 is four.

[0394] For example, the angle formed by the diagonal of the first square and the diagonal of the second square is 13 to 17 degrees. For example, the angle formed by the diagonal of the first square and the diagonal of the second square is 14.5 to 16.5 degrees. For example, the angle formed by the diagonal of the first square and the diagonal of the second square is 15 to 16 degrees.

[0395] For example, as shown in FIGS. 15A to 15G, the ratio of the light intensity at the edge position of the light area 300, for example, the apex angle area, to the light intensity at the center position of the light area 300 is 0.5 or more.

[0396] For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.55 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.6 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.65 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.7 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.75 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.8 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.85 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.9 or more.

[0397] For example, in the examples shown in FIGS. 15A to 15G, parameters such as dimensions and materials of the shielding walls may be the same as the corresponding parameters in the above examples, and detailed description thereof will be omitted here.

[0398] Figures 17A to 17G are schematic diagrams of one light area according to another example of an embodiment of the present disclosure, and Figure 18 is a relationship diagram of the relative light intensity at the edge positions of the light area after rotating the M-gon in the light area shown in Figures 17A to 17G by different angles.

[0399] For example, the angle formed between side M2 ​​of triangle M21 shown in FIG. 17A and the first direction may be 5 degrees, the angle formed between side M2 ​​of triangle M22 shown in FIG. 17B and the first direction may be 10 degrees, the angle formed between side M2 ​​of triangle M23 shown in FIG. 17C and the first direction may be 13 degrees, the angle formed between side M2 ​​of triangle M24 shown in FIG. 17D and the first direction may be 15 degrees, the angle formed between side M2 ​​of triangle M25 shown in FIG. 17E and the first direction may be 17 degrees, the angle formed between side M2 ​​of triangle M26 shown in FIG. 17F and the first direction may be 20 degrees, and the angle formed between side M2 ​​of triangle M27 shown in FIG. 17G and the first direction may be 30 degrees. Of course, the embodiments of the present disclosure are not limited to the above-mentioned degrees of the included angle formed between the sides of the triangle and the first direction, and the included angle formed between the sides of the triangle and the first direction may be selected according to the needs of the product.

[0400] The relative light intensities shown in FIGS. 17A to 17G may refer to the value of Q at the edge position of the light area, where Q=P×(1 / L1+1 / L2+...+1 / L N )

[0401] In the embodiments of the present disclosure, rotating an M-gon by different angles may mean rotating the M-gon by a certain angle around a certain area where the center of the M-gon is located, for example, rotating a triangle by a certain angle around a certain area where the center of the triangle is located.

[0402] The rotation may refer to rotating the M-gon clockwise, or may refer to rotating the M-gon counterclockwise.

[0403] The differences between the light areas shown in Figures 17A to 17G and the light areas shown in Figures 13A to 13G and 15A to 15G include the shape of the M-gon, and the M-gon shown in Figures 17A to 17G may be a triangle.

[0404] In some examples, as shown in Figures 17A to 17G, each light area 300 of at least some of the light areas 300 includes three light-emitting units 311, 312 and 313, and the centers of the three light-emitting units 311, 312 and 313 are sequentially connected to form a triangle, and the included angle between one of the first direction and the second direction and one side M2 ​​of the triangle is less than 5 degrees.

[0405] For example, as shown in FIGS. 17A to 17G, the ratio of the pitch of the light area 300 to the side length of the triangle is 1.7 to 2.3. For example, the ratio of the pitch of the light area 300 to the side length of the triangle is 1.65 to 2.25. For example, the ratio of the pitch of the light area 300 to the side length of the triangle is 1.7 to 2.2. For example, the ratio of the pitch of the light area 300 to the side length of the triangle is 1.75 to 2.15. For example, the ratio of the pitch of the light area 300 to the side length of the triangle is 1.8 to 2.1. For example, the ratio of the pitch of the light area 300 to the side length of the triangle is 1.85 to 2.05. For example, the ratio of the pitch of the light area 300 to the side length of the triangle is 1.9 to 2.

[0406] For example, as shown in FIGS. 17A to 17G, the light intensity at the edge of the light area 300, for example, at a corner area, is expressed as I1=I0×m×h×(1 / L1+1 / L2+...+1 / L N ) is satisfied, and the distance from the center of the i-th light-emitting unit 310 to the apex angle of the light area 300 is L i and the pitch P of the light area 300 and the number N of the light emitting units 310 are 8.5≧P×(1 / L1+1 / L2+...+1 / L N ) ≥ 6.3.

[0407] For example, as shown in FIGS. 17A to 17G, Q=P×(1 / L1+1 / L2+1 / L3), and 8.5≧Q≧6.3.

[0408] For example, as shown in FIGS. 17A to 17G, the dimensions of the light emitting unit 310 may be 0.219 mm×0.219 mm.

[0409] For example, as shown in Figures 17A to 17G and 18, if the pitch of the light areas 300 is 4.8 mm, the pitch of the light emitting units 310 is 2.6 mm, and the side length of the M-shaped polygon is 2.6 mm, when the included angle between side M2 ​​of the triangle and the first direction is 0 degrees, Q = 3.926995; when the included angle between side M2 ​​of the triangle and the first direction is 5 degrees, Q = 3.880136; and when the included angle between side M2 ​​of the triangle and the first direction is 10 degrees, Q = 3. When the included angle formed by the side M2 ​​of the triangle and the first direction is 13 degrees, Q=3.840027, when the included angle formed by the side M2 ​​of the triangle and the first direction is 13 degrees, Q=3.82151, when the included angle formed by the side M2 ​​of the triangle and the first direction is 15 degrees, Q=3.811524, when the included angle formed by the side M2 ​​of the triangle and the first direction is 17 degrees, Q=3.803458, when the included angle formed by the side M2 ​​of the triangle and the first direction is 20 degrees, Q=3.794941, and when the included angle formed by the side M2 ​​of the triangle and the first direction is 30 degrees, Q=3.797286. Thus, after rotating the M-polygon by different angles, the magnitude of the relative light intensity at the edge positions of the light area gradually decreases with increasing angle.

[0410] By setting the included angle between one of the first and second directions and one side M2 ​​of the triangle to a smaller value, the light intensity at the edge of the light area is improved, thereby improving the light output uniformity of the light area.

[0411] For example, as shown in FIGS. 17A to 17G, the included angle formed between the first direction or the second direction and one side M2 ​​of the triangle is less than 4.5 degrees. For example, the included angle formed between the first direction or the second direction and one side M2 ​​of the triangle is less than 4 degrees. For example, the included angle formed between the first direction or the second direction and one side M2 ​​of the triangle is less than 3.5 degrees. For example, the included angle formed between the first direction or the second direction and one side M2 ​​of the triangle is less than 3 degrees. For example, the included angle formed between the first direction or the second direction and one side M2 ​​of the triangle is less than 2.5 degrees. For example, the included angle formed between the first direction or the second direction and one side M2 ​​of the triangle is less than 2 degrees. For example, the included angle formed between the first direction or the second direction and one side M2 ​​of the triangle is less than 1.5 degrees. For example, the angle formed between the first direction or the second direction and one side M2 ​​of the triangle is less than 1 degree. For example, the angle formed between the first direction or the second direction and one side M2 ​​of the triangle is less than 0.5 degrees.

[0412] For example, as shown in FIGS. 17A to 17G, the ratio of the light intensity at the edge position of the light area 300, for example, the apex angle area, to the light intensity at the center position of the light area 300 is 0.5 or more.

[0413] For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.55 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.6 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.65 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.7 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.75 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.8 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.85 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.9 or more.

[0414] For example, in the examples shown in FIGS. 17A to 17G, parameters such as dimensions and materials of the shielding walls may be the same as the corresponding parameters in the above examples, and detailed description thereof will be omitted here.

[0415] FIG. 19 is a schematic diagram illustrating the distribution of light-emitting units in one light region according to another example of the embodiment of the present disclosure.

[0416] For example, in the example shown in FIG. 19, at least one light area 300 includes nine light-emitting units 311, 312, 313, 314, 315, 316, 317, 318, and 319, and lines connecting the centers of four of the light-emitting units 311, 312, 313, and 314 in sequence form a rectangle, or the nine light-emitting units 311, 312, 313, 314, 315, 316, 317, 318, and 319 are arranged in a rectangle, and the included angle between at least one of the first direction and the second direction and at least one side of the rectangle is greater than 0 degrees.

[0417] The four light-emitting units 311, 312, 313 and 314 may be the four light-emitting units located on the outermost sides, or may be the four light-emitting units closest to the apex of the light area.

[0418] For example, as shown in FIG. 19 , the included angles formed between the first and second directions and each side of the M-polygon are all greater than 0.5 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 1 degree. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 2 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 3 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 4 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 5 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 5.5 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 6 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 6.5 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 7 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 8 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 9 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 10 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 10.5 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 11 degrees. For example, the included angles formed between the first and second directions and each side of the M-polygon are all greater than 12 degrees.

[0419] For example, as shown in FIG. 19, the included angle formed by side M1 of the M-polygon and the first direction is 12 to 18 degrees. For example, the included angle formed by side M1 of the M-polygon and the first direction is 12.5 to 17.5 degrees. For example, the included angle formed by side M1 of the M-polygon and the first direction is 13 to 17 degrees. For example, the included angle formed by side M1 of the M-polygon and the first direction is 13.5 to 16.5 degrees. For example, the included angle formed by side M1 of the M-polygon and the first direction is 14 to 16 degrees. For example, the included angle formed by side M1 of the M-polygon and the first direction is 14.5 to 15 degrees.

[0420] For example, as shown in FIG. 19, the light area 300 includes nine light-emitting units, 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 where i is in the range of 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.

[0421] 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.

[0422] 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.

[0423] 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.

[0424] For example, 8≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≧6.

[0425] 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.

[0426] For example, 7.8≧P×(1 / L1+1 / L2+1 / L3+1 / L4+1 / L5+1 / L6+1 / L7+1 / L8+1 / L9)≧7.

[0427] 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.

[0428] 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.

[0429] 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.

[0430] 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.

[0431] For example, as shown in FIG. 19, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.7 to 2.3. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.65 to 2.25. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.7 to 2.2. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.75 to 2.15. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.8 to 2.1. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.85 to 2.05. For example, the ratio of the pitch of the light area 300 to the side length of the rectangle is 1.9 to 2.

[0432] For example, as shown in FIG. 19, nine light-emitting units 311, 312, 313, 314, 315, 316, 317, 318 and 319 may be uniformly arranged.

[0433] For example, the light-emitting unit 315 may be located at the center of a rectangle consisting of the four light-emitting units 311 , 312 , 313 and 314 .

[0434] For example, as shown in FIG. 19 , light-emitting unit 318 may be located between light-emitting unit 311 and light-emitting unit 314, light-emitting unit 319 may be located between light-emitting unit 313 and light-emitting unit 314, light-emitting unit 317 may be located between light-emitting unit 313 and light-emitting unit 312, and light-emitting unit 316 may be located between light-emitting unit 312 and light-emitting unit 311.

[0435] For example, the four sides of the rectangle pass through the centers of the light-emitting units 318, 319, 317, and 316, respectively.

[0436] For example, the centers of the light-emitting units 318, 319, 317, and 316 may be the centers of the four sides of a rectangle, respectively.

[0437] For example, as shown in FIG. 19, a quadrangle formed by lines sequentially connecting the centers of four light-emitting units 311, 312, 313, and 314 may be a rectangle.

[0438] For example, the rectangle formed by lines sequentially connecting the centers of the four light-emitting units 311, 312, 313, and 314 may be a square.

[0439] For example, the included angle between two sides of the rectangle and a first direction is greater than 0 degrees, and the included angle between two other sides of the rectangle and a second direction is greater than 0 degrees.

[0440] For example, as shown in FIG. 7, the shape of the light area 300 is a first square, and the rectangle formed by lines sequentially connecting the centers of the four light-emitting units 311, 312, 313, and 314 may be a second square, and the included angle between the diagonal of the first square and the diagonal of the second square is greater than 0 degrees.

[0441] For example, as shown in FIG. 19, the ratio of the light intensity at the edge position of the light area 300, for example, the apex angle area, to the light intensity at the center position of the light area 300 is 0.5 or more.

[0442] For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.55 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.6 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.65 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.7 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.75 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.8 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.85 or more. For example, the ratio of the light intensity at the edge position of the light area 300 to the light intensity at the center position of the light area 300 is 0.9 or more.

[0443] For example, in the example shown in FIG. 19, parameters such as the dimensions and materials of the shielding wall and the dimensions of the light-emitting unit may be the same as the corresponding parameters in the above example, and detailed description thereof will be omitted here.

[0444] In the embodiments of the present disclosure, the shape of the light area is not limited to the rectangle shown in Figures 1 to 19, and for example, the shape of the light area may be designed according to the needs of the display panel corresponding to the backlight structure, for example, the shape of the light area may further be hexagonal or octagonal, etc.

[0445] In the embodiments of the present disclosure, the number of light-emitting units in the light area is not limited to 3, 4, 5, 7, or 9 as shown in Figures 1 to 19, but may be set based on the position and dimensions of the light-emitting units, for example, the number of light-emitting units in the light area may be 6, 8, 10, 11, 12, etc.

[0446] The backlight structure according to the embodiment of the present disclosure contributes to improving the light intensity at the edge of the light area and further improves the light output uniformity of the light area by collectively setting the number of light-emitting units in the light area, the side length of the M-polygon, the pitch of the light area, and the included angle between the side of the M-polygon and the first or second direction.

[0447] Fig. 20 is a partial cross-sectional view taken along line AA' in Fig. 1 according to another example of an embodiment of the present disclosure. Fig. 21 is a partial cross-sectional view taken along line BB' in Fig. 10 according to another example of an embodiment of the present disclosure.

[0448] 20 and 21, the backlight structure further includes a planar adhesive 400 positioned between the shielding wall 220 and the light-emitting unit 310 and between two adjacent light-emitting units 310. The thickness of the planar adhesive 400 is equal to or greater than the height of the light-emitting units 310 and smaller than the thickness of the shielding wall 220, and the orthogonal projection of the surface of the planar adhesive 400 facing the substrate 100 on the substrate 100 is completely located within the orthogonal projection of the surface of the planar adhesive 400 facing away from the substrate 100 on the substrate 100.

[0449] For example, as shown in FIGS. 20 and 21, a flat adhesive 400 may be filled in at least a portion of the gap between the shielding wall 220 and the light-emitting unit 310 and at least a portion of the gap between adjacent light-emitting units 310 .

[0450] For example, as shown in FIGS. 20 and 21, the thickness of the planar adhesive 400 may be greater than the height of the light-emitting unit 310 or may be equal to the height of the light-emitting unit 310.

[0451] For example, as shown in FIGS. 20 and 21 , the planar adhesive 400 may use white oil. For example, the thickness of the planar adhesive 400 may be 50 micrometers. For example, the thickness of the planar adhesive 400 may be greater than 90 micrometers. For example, the thickness of the planar adhesive 400 may be less than 250 micrometers. For example, the thickness of the planar adhesive 400 may be less than 200 micrometers. For example, the thickness of the planar adhesive 400 may be less than 180 micrometers. For example, the thickness of the planar adhesive 400 may be less than 150 micrometers. For example, the thickness of the planar adhesive 400 may be less than 120 micrometers. For example, the thickness of the planar adhesive 400 may be less than 100 micrometers.

[0452] In some examples, as shown in Figures 20 and 21, the cross-sectional shape of the planar adhesive 400 cut by a plane (e.g., the XZ plane) on which the central connecting lines of two adjacent light-emitting units 310 are located comprises a trapezoid, the length of the first base 410 of the trapezoid that is away from the substrate 100 is greater than the length of the second base 420 of the trapezoid that is closer to the substrate 100, the distance between the approaching end points of the first base 410 and the second base 420 when orthogonally projected on the substrate 100 is 17 to 32 micrometers, and the plane on which the central connecting lines of the two adjacent light-emitting units 310 are located is perpendicular to the substrate 100.

[0453] 20 and 21, the central connecting line between the first base 410 and the second base 420 is perpendicular to the substrate 100. For example, the difference in length between the first base 410 and the second base 420 on one side perpendicular to the central line of the trapezoidal substrate 100 may be 17 to 32 micrometers.

[0454] For example, the difference in thickness of the flat adhesive 400 at different positions may be 10% or less of the maximum thickness of the flat adhesive 400. For example, the difference in thickness of the flat adhesive 400 at different positions may be 8% or less of the maximum thickness of the flat adhesive 400.

[0455] For example, the thickness of the planar adhesive 400 may be 49.79 micrometers, and the length difference on one side perpendicular to the center line of the trapezoidal substrate 100 of the first base side 410 and the second base side 420 may be 28.93 micrometers, and the length difference on the other side perpendicular to the center line of the trapezoidal substrate 100 of the first base side 410 and the second base side 420 may be 30.9 micrometers.

[0456] For example, the thickness of the planar adhesive 400 may be 47.29 micrometers, and the length difference on one side perpendicular to the center line of the trapezoidal substrate 100 of the first base side 410 and the second base side 420 may be 26.3 micrometers, and the length difference on the other side perpendicular to the center line of the trapezoidal substrate 100 of the first base side 410 and the second base side 420 may be 29.59 micrometers.

[0457] For example, the thickness of the planar adhesive 400 may be 51.28 micrometers, and the length difference on one side of the first base edge 410 and the second base edge 420 perpendicular to the center line of the trapezoidal substrate 100 may be 18.41 micrometers, and the length difference on the other side of the first base edge 410 and the second base edge 420 perpendicular to the center line of the trapezoidal substrate 100 may be 26.96 micrometers.

[0458] For example, the thickness of the planar adhesive 400 may be 51.94 micrometers, and the length difference on one side perpendicular to the center line of the trapezoidal substrate 100 of the first base side 410 and the second base side 420 may be 26.3 micrometers, and the length difference on the other side perpendicular to the center line of the trapezoidal substrate 100 of the first base side 410 and the second base side 420 may be 27.61 micrometers.

[0459] In the backlight structure of the present disclosure, the cross section of the flat adhesive is set to be trapezoidal, for example, by forming an undercut structure, which can prevent the flat adhesive from being stretched by heat and eroding the pad (e.g., pad 321 shown in FIG. 2A) electrically connected to the light-emitting unit, and at the same time, can prevent the light emitted from the light-emitting unit from passing through the flat adhesive and emitting, which can change the light emission characteristics due to differences in refractive index.

[0460] FIG. 22 is a schematic partial cross-sectional view of another example of the embodiment of the present disclosure taken along the line BB' shown in FIG.

[0461] In some examples, as shown in FIG. 22, a thermally conductive adhesive 500 is provided on the side of the substrate 100 away from the light-emitting units 310, and at least one aperture 501 is provided in the thermally conductive adhesive 500.

[0462] For example, as shown in FIG. 22, a black heat-conductive adhesive having a thickness of less than 1 micrometer is applied to the entire surface of the substrate 100 away from the light-emitting unit 310, thereby achieving a heat dissipation effect.

[0463] For example, as shown in Fig. 22, the diameter of the apertures 502 may be 1.5 mm. For example, the number of apertures 502 may be more than 100, such as 29*18. The provision of apertures in the thermally conductive adhesive helps to provide ventilation when the thermally conductive adhesive is attached to the substrate, and prevents the thermally conductive adhesive from being folded.

[0464] For example, a ground conductor, such as a copper conductor, may be further installed on the side of the substrate 100 away from the light emitting unit 310. For example, the length of the copper conductor may be 0.45 mm.

[0465] For example, a 0.3 micrometer thick flat adhesive may be further installed on the side of the substrate 100 facing the light emitting unit 310, and a white bank material may be installed around the periphery of each light area, for example, the white bank material may be 0.5 millimeters wide and 0.25 millimeters high, thereby improving brightness and reducing halation.

[0466] FIG. 23 is a partial cross-sectional schematic view of a backlight structure including the substrate, the shielding wall, and the light-emitting unit shown in FIG.

[0467] 23, the backlight structure further includes a light-diffusing structure 610 located on the side of the light-emitting unit 310 away from the substrate 100. The light-diffusing structure 610 includes at least one layer of a diffusing film, for example, the light-diffusing structure 610 includes three layers of diffusing films 611, 612, and 613, each having a thickness of 0.05 to 0.2 millimeters.

[0468] For example, the thicknesses of the different diffusion films may be the same or different.

[0469] 23, 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 may all be 0.19 mm. For example, the weight of the diffusion film may 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.

[0470] 23, the backlight structure further includes a color conversion structure 620 located on the side of the light-diffusing structure 610 away from the light-emitting units 310. The color conversion structure 620 includes a color conversion film 622 configured to convert a first color light into a second color light, where the first color light includes blue light and the second color light includes at least one of red light 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.

[0471] In some examples, as shown in FIG. 23, the color conversion structure 620 further includes a prism 623 located on the side of the color conversion film 622 away from the light-emitting unit 310 .

[0472] For example, prism 623 may have a total thickness of 0.2 millimeters, and prism 623 may include multiple sub-prisms, each of which may be 39 micrometers long, 39 micrometers wide, and 17 micrometers high.

[0473] For example, the ratio of the pitch of the sub-prisms to the pitch of the light-emitting units is greater than 100 and less than 150.

[0474] For example, as shown in FIG. 23, the color conversion structure 620 further includes a phosphor composite film 621 located on the side of the color conversion film 622 that is closest to the substrate 100 .

[0475] For example, as shown in FIG. 23, the thickness of the color conversion structure 620 may be 0.2 to 0.4 millimeters. For example, the thickness of the color conversion structure 620 may be 0.21 millimeters. For example, the thickness of the color conversion structure 620 may be 0.27 millimeters. For example, the thickness of the color conversion structure 620 may be 0.308 millimeters. For example, the thickness of the color conversion structure 620 may be 27 grams. For example, the thickness of the color conversion structure 620 may be 30.78 grams.

[0476] 23, the backlight structure further 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, and the thickness of the prism layer is 0.05 to 0.2 millimeters.

[0477] 23, the prism structure 630 includes a prism layer 631 and a prism layer 632. For example, the thicknesses of the prism layer 631 and the prism layer 632 may be the same or different.

[0478] 23, the thickness of prism layer 631 may be 0.1 mm, and the thickness of prism layer 632 may be 0.11 mm. For example, the thickness of prism layer 631 may be 0.09 mm, and the thickness of prism layer 632 may be 0.24 mm.

[0479] For example, the prismatic structure 630 may include only one prismatic layer, and the thickness of the prismatic layer may be 0.16 millimeters.

[0480] For example, the backlight structure may further include a diffuser plate (not shown) located on the side of the prismatic structure 630 away from the substrate 100 .

[0481] 24 is a partial cross-sectional structural schematic diagram of a display device according to another embodiment of the present disclosure. As shown in FIG. 24, the display device includes a display panel 1000 and a backlight structure 2000, and the display panel 1000 is located on the light-emitting side of the backlight structure 2000.

[0482] The backlight structure in the display device according to the present disclosure may be any one of the backlight structures according to the above embodiments, and by collectively setting the number of light-emitting units in the light area of ​​the backlight structure, the side length of the M-gon, the pitch of the light area, and the included angle between the side of the M-gon and the first or second direction, it contributes to improving the light intensity at the edge of the light area and further improves the light output uniformity of the light area.

[0483] 24, the backlight structure 2000 further includes a diffuser 650 located on the side of the prism structure 630 facing away from the substrate 100. For example, the thickness of the diffuser 650 may be 0.24 millimeters. For example, the weight of the diffuser 650 may be 15.2 grams.

[0484] 24, the display panel 1000 is a liquid crystal display panel. The liquid crystal display panel may include an array substrate 1003, a counter substrate 1002, and a liquid crystal layer (not shown) located between the array substrate 1003 and the counter substrate 1002.

[0485] For example, the side of the array substrate 1003 facing the counter substrate 1002 may include a plurality of grid lines extending in one direction and a plurality of data lines extending in the other direction, and the plurality of grid lines and the plurality of data lines may be arranged crossing each other to define a plurality of pixel units arranged in an array, and the plurality of pixel units may be arranged in a pixel array. Each pixel unit may include a pixel electrode and a thin film transistor, and the grid line is connected to the gate of the thin film transistor to control the on / off of the thin film transistor, the pixel electrode is connected to one of the source / drain electrodes of the thin film transistor, and the data line is connected to the other of the source / drain electrodes of the thin film transistor, and the data line inputs a voltage signal required for the display screen to the pixel electrode via the thin film transistor, thereby realizing display on the array substrate.

[0486] For example, the counter substrate 1002 may be a color film substrate, and a black matrix may be provided on the side of the color film substrate facing the array substrate 1003 to cover the color film layer corresponding to the pixel units and structures located in the non-display area, such as grid lines and data lines. For example, a common electrode may be further provided on the side of the color film substrate facing the array substrate 1003 to face the pixel electrodes, and the common electrode is configured to apply a common voltage to generate an electric field that drives and deflects the pixel electrodes and the liquid crystal molecules in the liquid crystal layer. The deflection of the liquid crystal molecules changes the transmittance of the liquid crystal layer, thereby displaying the desired grayscale image.

[0487] 24, the display panel 1000 may further include a first polarizer 1004 disposed on the side of the array substrate 1003 away from the counter substrate 1002, and a second polarizer 1001 disposed on the side of the counter substrate 1002 away from the array substrate 1003. The first polarizer 1004 has a transmission axis extending along the DI1 direction and polarizes backlight incident thereon along the DI1 direction. The second polarizer 1001 has a transmission axis extending along the DI2 direction and polarizes light incident thereon along the DI2 direction. For example, the transmission axis of the first polarizer 1004 and the transmission axis of the second polarizer 1001 are perpendicular to each other.

[0488] For example, as shown in FIG. 24, the display device further comprises an adhesive frame 3002 for supporting the display panel 1000 .

[0489] 24, the display device further includes a support frame 3001 including an integral structure of an outer frame and a back frame, for supporting an adhesive frame 3002 and a backlight structure 2000.

[0490] For example, as shown in FIG. 24, the display device further includes a fixing adhesive 640 located on the side away from the light panel 123, which includes structures such as a substrate of the thermally conductive adhesive 500, a light-emitting unit, and a shielding wall pattern, and the fixing adhesive 640 is for fixing the backlight structure 2000 to the support frame 3001.

[0491] For example, as shown in FIG. 24, the thickness of the second polarizer 1001 may be 0.28 mm. For example, the thickness of the counter substrate 1002 may be 0.25 mm. For example, the thickness of the array substrate 1003 may be 0.25 mm. For example, the thickness of the first polarizer 1004 may be 0.11 mm. For example, the sum of the weights of the second polarizer 1001, the counter substrate 1002, the array substrate 1003, and the first polarizer 1004 may be 159.3 grams.

[0492] For example, as shown in FIG. 24, the thickness of the second polarizer 1001 may be 0.122 mm. For example, the thickness of the counter substrate 1002 may be 0.2 mm. For example, the thickness of the array substrate 1003 may be 0.2 mm. For example, the thickness of the first polarizer 1004 may be 0.087 mm. For example, the sum of the weights of the second polarizer 1001, the counter substrate 1002, the array substrate 1003, and the first polarizer 1004 may be 105.47 grams.

[0493] For example, as shown in FIG. 24, the thickness of the light panel 123 may be 0.27 millimeters, and a light panel protective adhesive may be further installed between the light panel 123 and the thermally conductive adhesive 500, for example, the thickness of the light panel protective adhesive may be 0.31 millimeters, the thickness of the thermally conductive adhesive 500 may be 0.09 millimeters, and the total weight of the light panel, light panel protective adhesive, and thermally conductive adhesive may be 76.6 grams.

[0494] For example, as shown in FIG. 24, the thickness of the light panel 123 may be 0.25 millimeters, and only the light panel protective adhesive may be installed on the side of the light panel 123 away from the light diffusion structure 610 without installing the thermally conductive adhesive, for example, the thickness of the light panel protective adhesive may be 0.1 millimeters, and the total weight of the light panel and the light panel protective adhesive may be 41.41 grams.

[0495] For example, as shown in Figure 24, when the thermally conductive adhesive 500 is installed, the thickness of the fixing adhesive 640 may be 0.03 millimeters. For example, when the thermally conductive adhesive 500 is not installed, the thickness of the fixing adhesive 640 may be 0.1 millimeters.

[0496] A few points need to be explained:

[0497] (1) The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure, and other structures may refer to conventional designs.

[0498] (2) As long as there is no conflict, features in the same embodiment and different embodiments of the present disclosure may be combined with each other.

[0499] The above descriptions are merely exemplary embodiments of the present disclosure and are not intended to limit the protection scope of the present disclosure, which is determined by the appended claims. [Explanation of symbols]

[0500] 100 boards 101 Intermediate area 102 Edge area 123 Light Panel 200 Shielding Wall Pattern 210 Aperture 220 Shielding Wall 300 Light Area 310~319 Lighting unit 321 Pad 322 Weld Metal 323 Light-emitting diode chip 324 Package Structure 325 Color conversion materials 326 Protective layer 391 Diagonal 392 diagonal 400 Flat Adhesive 410 First Base 420 Second Base 500 Thermally conductive adhesive 501 Open hole 502 Open hole 610 Light diffusion structure 611 Diffusion membrane 612 Diffusion membrane 613 Diffusion membrane 620 Color conversion structure 621 Phosphor composite film 622 Color conversion film 623 Prism 630 Prism Structure 631 Prismatic Layer 632 Prismatic Layer 640 Fixing Adhesive 650 Diffuser 1000 display panel 1001 Second polarizing plate 1002 Opposing substrate 1003 Array board 1004 First polarizing plate 2000 Backlight Structure 3001 Support Frame 3002 Adhesive frame

Claims

1. A backlight structure, A substrate; a shielding wall pattern located on the substrate, the shielding wall pattern including a plurality of apertures arranged in an array along a first direction and a second direction, and a shielding wall surrounding each aperture, the plurality of apertures being configured to define a plurality of light regions, the first direction intersecting the second direction; a plurality of light emitting units located on the substrate and arranged in the plurality of light areas; The substrate includes an intermediate region and an edge region surrounding the intermediate region, at least three light-emitting units are installed in each light region located at least in the intermediate region, the centers of M light-emitting units of the at least three light-emitting units that are closest to the apex angle of the light region are sequentially connected to form an M-polygon, the distance between the center of the M-polygon and the center of the light region is less than 10% of the pitch of the light region, and the included angles formed by the first direction and the second direction and each side of the M-polygon are all greater than 0 degrees.

2. 2. The backlight structure according to claim 1, wherein the ratio of different side lengths of the M-gon is 0.9 to 1.1, and the ratio of the pitch of the light area to the side length of the M-gon is 1.7 to 2.

3.

3. The pitch of the light area is P, and each light area of ​​the at least some light areas includes N light emitting units, N≧M, and the distance from the center of the i-th light emitting unit to the apex angle of the light area is L ｉ where i ranges from 1 to N, and L ｉ , P and N are 8.5 ≧ P × (1 / L １ +1 / L ２ +...+1 / L Ｎ 3. The backlight structure according to claim 2, wherein the following relationship is satisfied: ) ≥ 6.

3.

4. The light emitting intensity distribution I of the light emitting unit is I=I ０ Satisfying cosmα, I ０ 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 line, and m=(-ln2) / (ln cos α １／２ ), and α １／２ is the angle formed by 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 from the light-emitting unit in the normal direction is h; Each light area of ​​the at least some light areas includes N light-emitting units, where N≧M, and the distance from the center of the i-th light-emitting unit to the apex of the light area is L ｉ where i ranges from 1 to N, and L ｉ , h and N are 0.5≧{cosm×[(π / 2)−(h / L １ )]+cosm×[(π / 2)−(h / L ２ )]+...+cosm×[(π / 2)-(h / L Ｎ 3. The backlight structure according to claim 2, wherein the relationship {tilde over (V)} > 0.23 is satisfied.

5. 5. The backlight structure according to claim 2, wherein 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 0.5 or more.

6. 6. The backlight structure according to claim 2, wherein each of the at least some of the light areas includes at least four light-emitting units, the at least four light-emitting units are arranged in an M-shaped polygon, and an included angle formed between one of the first direction and the second direction and at least one side of the M-shaped polygon is 12 to 18 degrees.

7. 7. The backlight structure of claim 6, wherein the shape of each light area of ​​the at least some light areas is a first square, each light area of ​​the at least some light areas includes at least four light-emitting units, the M-shaped polygon is a second square, and the included angle between the diagonal of the first square and the diagonal of the second square is 12 to 18 degrees.

8. The backlight structure according to any one of claims 1 to 7, wherein the shape of at least a portion of the light areas includes a rectangle, and two adjacent sides of the rectangle extend along the first direction and the second direction, respectively.

9. 9. The backlight structure according to claim 1, wherein the light emitting units disposed in each light region are electrically connected, and the shielding wall includes a light-shielding material.

10. 10. The backlight structure according to claim 1, wherein the light emitting unit includes a light emitting diode chip and a packaging structure configured to package the light emitting diode chip, and a gap is provided between the packaging structures of adjacent light emitting units.

11. 11. The backlight structure of claim 10, wherein the maximum dimension of the light-emitting unit in a direction parallel to the substrate is 500 micrometers or less.

12. The backlight structure according to claim 7 , wherein the at least four light-emitting units include four light-emitting units, and the centers of the four light-emitting units are sequentially connected to form the second square.

13. 8. The backlight structure of claim 7, wherein the at least four light-emitting units include five light-emitting units, and the centers of the four light-emitting units located at the outermost edges of the five light-emitting units are connected in sequence to form the second square.

14. 3. The backlight structure of claim 2, wherein each light area of ​​the at least some light areas includes three light-emitting units, the centers of the three light-emitting units are sequentially connected to form a triangle, and an included angle between one of the first direction and the second direction and one side of the triangle is less than 5 degrees.

15. 15. The backlight structure according to claim 1, wherein the thickness of the shielding wall is greater than the height of the light-emitting unit in a direction perpendicular to the substrate.

16. 16. The backlight structure according to claim 15, wherein the shielding wall has a thickness of 200 to 400 micrometers, and the light-emitting unit has a height of 50 to 100 micrometers.

17. 17. The backlight structure according to claim 15, wherein the shielding wall has a thickness of 250 to 270 micrometers, a width of 350 to 500 micrometers, and a height of the light-emitting unit is 80 to 100 micrometers.

18. Further, a planar adhesive is disposed between the shielding wall and the light-emitting unit and between two adjacent light-emitting units; A backlight structure described in any one of claims 15 to 17, wherein the thickness of the planar adhesive is equal to or greater than the height of the light-emitting unit and smaller than the thickness of the shielding wall, and the orthogonal projection of the surface of the planar adhesive facing the substrate on the substrate is completely located within the orthogonal projection of the surface of the planar adhesive facing away from the substrate on the substrate.

19. 19. The backlight structure of claim 18, wherein the cross-sectional shape of the planar adhesive cut by a plane on which the central connecting lines of the two adjacent light-emitting units are located includes a trapezoid, the length of a first base side of the trapezoid that is away from the substrate is greater than the length of a second base side of the trapezoid that is closer to the substrate, and the distance between the closest end points of the first base side and the second base side when orthogonally projected on the substrate is 17 to 32 micrometers, and the plane is perpendicular to the substrate.

20. 20. The backlight structure of claim 1, wherein a thermally conductive adhesive is provided on the side of the substrate away from the light-emitting unit, and at least one aperture is provided in the thermally conductive adhesive.

21. a light diffusing structure located on a side of the light emitting unit away from the substrate; 20. The backlight structure of claim 1, wherein the light-diffusing structure includes at least one layer of a diffusion film, and the thickness of the diffusion film is 0.05 to 0.2 mm.

22. a color conversion structure located on a side of the light diffusion structure that is away from the light emitting unit; 22. The backlight structure of claim 21, wherein the color conversion structure includes a color conversion film 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 light and green light.

23. 23. The backlight structure of claim 22, wherein the color conversion structure further comprises a prism located on a side of the color conversion film away from the light emitting unit.

24. The color conversion structure further includes a prism structure located on a side away from the light-emitting unit, 24. The backlight structure of claim 22 or 23, wherein the prism structure includes at least one prism layer, and the thickness of the prism layer is 0.05 to 0.2 mm.

25. A backlight structure, A substrate; a shielding wall pattern located on the substrate, the shielding wall pattern including a plurality of apertures arranged in an array along a first direction and a second direction, and a shielding wall surrounding each aperture, the plurality of apertures being configured to define a plurality of light regions, the first direction intersecting the second direction; a plurality of light emitting units located on the substrate and arranged in the plurality of light areas; At least three light emitting units are installed in each light area of ​​at least some of the light areas, and the centers of M light emitting units among the at least three light emitting units that are closest to the apex angle of the light area are sequentially connected to form an M-gon, and the distance between the center of the M-gon and the center of the light area is less than 10% of the pitch of the light area, and the ratio of different side lengths of the M-gon is 0.9 to 1.1, and the ratio of the pitch of the light area to the side length of the M-gon is 1.7 to 2.3, A backlight structure in which at least one side of the M-gon is parallel to at least one of the first direction and the second direction.

26. Each light area of ​​the at least some light areas includes N light emitting units, N≧M, and the distance from the center of the i-th light emitting unit to the apex of the light area is L ｉ where i ranges from 1 to N, and L ｉ , P and N are 8.5 ≧ P × (1 / L １ +1 / L ２ +...+1 / L Ｎ 26. The backlight structure according to claim 25, wherein ≈ 6.3 is satisfied.

27. The light emitting intensity distribution I of the light emitting unit is I=I ０ Satisfying cosmα, I ０ 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 line, and m=(-ln2) / (ln cos α １／２ ), and α １／２ is the angle formed by 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 from the light-emitting unit in the normal direction is h; Each light area of ​​the at least some light areas includes N light emitting units, N≧M, and the distance from the center of the i-th light emitting unit to the apex of the light area is L ｉ where i ranges from 1 to N, and L ｉ , h and N are 0.5≧{cosm×[(π / 2)−(h / L １ )]+cosm×[(π / 2)−(h / L ２ )]+...+cosm×[(π / 2)-(h / L Ｎ 26. The backlight structure according to claim 25, wherein the following relationship is satisfied: {tilde over (V)} > 0.

23.

28. 28. The backlight structure according to claim 25, wherein a ratio of light intensity at an edge position of the light area to light intensity at a center position of the light area is 0.5 or more.

29. 29. The backlight structure according to claim 25, wherein each light area of ​​at least some of the light areas includes at least four light-emitting units, the at least four light-emitting units are arranged in an M-shaped polygon, and an included angle formed between one of the first direction and the second direction and at least one side of the M-shaped polygon is 0 degrees.

30. 30. The backlight structure of claim 29, wherein the shape of each light area of ​​the at least some light areas is a first square, each light area of ​​the at least some light areas includes at least four light-emitting units, the M-shaped polygon is a second square, and the included angle between the diagonal of the first square and the diagonal of the second square is 0 degrees.

31. 31. The backlight structure of claim 30, wherein the at least four light-emitting units include four light-emitting units, and the centers of the four light-emitting units are sequentially connected to form the second square.

32. 30. The backlight structure of claim 29, wherein each light area of ​​the at least some light areas includes three light-emitting units, and the centers of the three light-emitting units are sequentially connected to form a triangle, and one side of the triangle extends along the first direction or the second direction.

33. 33. The backlight structure according to claim 25, wherein the light emitting units installed in each light area are electrically connected, and the shielding wall includes a light-shielding material.

34. The backlight structure of any one of claims 25 to 32, wherein the light emitting units include light emitting diode chips and packaging structures configured to package the light emitting diode chips, and a gap is provided between the packaging structures of adjacent light emitting units.

35. 35. The backlight structure of claim 34, wherein the light-emitting unit has a maximum dimension parallel to the substrate of 500 micrometers or less.

36. The backlight structure according to any one of claims 25 to 32, wherein the shape of at least some of the light areas includes a rectangle, and two adjacent sides of the rectangle extend along the first direction and the second direction, respectively.

37. 37. The backlight structure according to claim 25, wherein the thickness of the shielding wall is 250 to 270 micrometers, the width of the shielding wall is 350 to 500 micrometers, and the height of the light-emitting unit is 80 to 100 micrometers.

38. Further, a planar adhesive is disposed between the shielding wall and the light-emitting unit and between two adjacent light-emitting units; A backlight structure described in any one of claims 25 to 37, wherein the thickness of the planar adhesive is equal to or greater than the height of the light-emitting unit and smaller than the thickness of the shielding wall, and the orthogonal projection of the surface of the planar adhesive facing the substrate on the substrate is completely located within the orthogonal projection of the surface of the planar adhesive facing away from the substrate on the substrate.

39. The backlight structure of claim 38, wherein the cross-sectional shape of the planar adhesive cut by a plane on which the central connecting lines of the two adjacent light-emitting units are located includes a trapezoid, the length of a first base side of the trapezoid that is away from the substrate is greater than the length of a second base side of the trapezoid that is closer to the substrate, and the distance between the closest end points of the first base side and the second base side when projected orthogonally on the substrate is 17 to 32 micrometers, and the plane is perpendicular to the substrate.

40. A display device, A display panel; A backlight structure according to any one of claims 1 to 39, The display device wherein the display panel is located on the light output side of the backlight structure.

Images