Direct-type backlight module and display device

Abstract

The present invention relates to a direct-type backlight module and a display device. The direct-type backlight module comprises at least one light-emitting diode, a shading member and a diffusion plate. The shading member is arranged above the light-emitting diode and corresponds to the light-emitting diode, and the size of the shading member is larger than the size of the light-emitting diode. The shading member comprises a light processing part and a light absorbing frame part. A part of the light emitted by the light-emitting diode and directed toward the shading member passes through the light processing part. The light absorbing frame part is connected to the outer periphery of the light processing part to absorb the light directed toward the light absorbing frame part. The diffusion plate is arranged above the shading member. The display device comprises the above-mentioned direct-type backlight module and a display panel.

Description

Technical Field

[0001] The invention relates to a direct-type backlight module and a display device, and in particular to a direct-type backlight module which uses a light shielding sheet to improve brightness uniformity and a display device comprising the direct-type backlight module. Background Art

[0002] With the advancement of technology, electronic devices equipped with liquid crystal display (LCD) panels, such as mobile phones, tablets, laptops, and automotive display devices, have become indispensable items in modern people's lives. Since liquid crystal itself does not emit light, LCD panels need to use backlight modules as backlight sources. According to the position of the light source, the backlight module can be divided into an edge-entry backlight module and a direct-type backlight module. Among them, the direct-type backlight module is conducive to reducing the thickness of the overall structure and can meet the trend of thinning display devices. Therefore, today's direct-type backlight modules mostly use light-emitting diodes (LEDs) as light sources. However, the energy density directly above the LED is very high, which makes it easy to observe bright spots from the appearance of the direct-type backlight module, thereby affecting the image quality of the LCD panel.

[0003] Therefore, how to overcome the lack of bright spots that are easily observed from the appearance of the direct-lit backlight module and improve the brightness uniformity of the direct-lit backlight module has become a goal of relevant industry players. Summary of the invention

[0004] The object of the present invention is to provide a direct-type backlight module and a display device to solve the above problems.

[0005] According to an embodiment of the present invention, a direct-type backlight module is provided, comprising at least one light emitting diode (LED), a shading member and a diffusion plate. The shading member is arranged above the LED and corresponds to the LED. The size of the shading member is larger than the size of the LED. The shading member comprises a light processing portion and a light absorbing frame portion. A portion of the light emitted by the LED and directed toward the shading member passes through the light processing portion. The light absorbing frame portion is connected to the outer periphery of the light processing portion to absorb the light directed toward the light absorbing frame portion. The diffusion plate is arranged above the shading member.

[0006] According to the aforementioned direct-type backlight module, a transparent carrier may be further included. The transparent carrier is disposed above the LEDs, and the shading element is disposed on a surface of the transparent carrier facing the LEDs or a surface away from the LEDs.

[0007] According to the aforementioned direct-lit backlight module, the reflectivity of the light processing portion may be greater than the transmittance.

[0008] According to the aforementioned direct-lit backlight module, the shape of the light shielding element may be circular.

[0009] According to the aforementioned direct-lit backlight module, the light-absorbing frame portion can completely surround the outer periphery of the light processing portion.

[0010] According to the aforementioned direct-lit backlight module, a notch may be formed at the outer periphery of the light processing portion, and at least one edge of the notch is not provided with a light-absorbing frame portion.

[0011] According to the above-mentioned direct-lit backlight module, a plurality of notches may be formed on the outer periphery of the light processing portion, and the light shielding member includes a plurality of light-absorbing frame portions, and the plurality of light-absorbing frame portions are spaced apart from the plurality of notches.

[0012] According to the aforementioned direct-lit backlight module, a plurality of notches may be formed on the outer periphery of the light processing portion, and the plurality of notches are arranged at equal angles.

[0013] According to the aforementioned direct-type backlight module, wherein the length of the shading member is L, the length of the LED is D, the radiation angle of the LED is θ, and the spacing distance between the shading member and the LED is H, the following condition can be satisfied: L≥D+2×H×tanθ.

[0014] According to the aforementioned direct-lit backlight module, the width of the light-absorbing frame portion is W, which can satisfy the following condition: 1 mm ≥ W > 0 mm.

[0015] According to the aforementioned direct-lit backlight module, the spacing distance between the light shielding member and the LED is H, which can satisfy the following condition: 3mm≥H≥0.5mm.

[0016] According to another embodiment of the present invention, a display device is provided, comprising the above-mentioned direct-type backlight module and a display panel, wherein the display panel is disposed above the direct-type backlight module.

[0017] Compared with the prior art, the present invention can avoid directly observing the light spot of the LED from the appearance of the direct-type backlight module with the help of the light processing part of the shading member, and can effectively avoid the formation of halos with the help of the light-absorbing frame part of the shading member, so as to make the energy distribution above the LED uniform and make it difficult to observe the bright spot from the appearance of the direct-type backlight module, thereby improving the brightness uniformity of the direct-type backlight module. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional schematic diagram of a direct-type backlight module according to an embodiment of the present invention.

[0019] Figure 2 yes Figure 1 A magnified schematic diagram of area A in the middle.

[0020] Figure 3is a schematic plan view of a shading element according to an embodiment of the present invention.

[0021] Figure 4 FIG. 4 is a schematic plan view of a shading element according to another embodiment of the present invention.

[0022] Figure 5 is a schematic plan view of a shading element according to yet another embodiment of the present invention.

[0023] Figure 6 is a schematic plan view of a shading element according to yet another embodiment of the present invention.

[0024] Figure 7 FIG. 4 is a cross-sectional schematic diagram of a direct-lit backlight module according to another embodiment of the present invention.

[0025] Figure 8 yes Figure 7 Schematic diagram of the enlarged view of area B.

[0026] Fig. 9 is a schematic cross-sectional view of a display device according to an embodiment of the present invention.

[0027] Fig.10 It is a schematic diagram of the light path of LED. DETAILED DESCRIPTION

[0028] The above and other technical contents, features and effects of the present invention will be clearly presented in the detailed description of the preferred embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front, back, bottom, top, etc., only refer to the directions in the accompanying drawings. Therefore, the directional terms used are only for illustration and not for limiting the present invention. In addition, in the following embodiments, the same or similar elements will be marked with the same or similar reference numerals.

[0029] In the present invention, the direct-type backlight module can be used to provide a light source for a liquid crystal display (LCD) panel. Each component in the direct-type backlight module includes a bottom surface and a top surface. The bottom surface and the top surface are defined with reference to the LCD panel. The side of each component away from the LCD panel is the bottom surface, and the side facing the LCD panel is the top surface. In addition, in the present invention, one component is arranged above another component, which means that the one component is arranged on the top surface of the other component or above the top surface of the other component.

[0030] Please refer to Figure 1, which is a cross-sectional schematic diagram of a direct-type backlight module 100 according to an embodiment of the present invention. The direct-type backlight module 100 includes at least one light emitting diode (LED) 110, a shading member 120 and a diffusion plate 130. The LED 110 serves as a light source of the direct-type backlight module 100, and its lower surface 111 is disposed on a circuit board 140. The shading member 120 is disposed above the LED 110 and corresponds to the LED 110, and the size of the shading member 120 is larger than the size of the LED 110. The diffusion plate 130 is disposed above the shading member 120, and is used to improve the light uniformity of the direct-type backlight module 100. The diffusion plate 130 may be, but is not limited to, a high-haze diffusion plate.

[0031] Please also refer to Figure 3 , which is a schematic plan view of a light shielding member 120 according to an embodiment of the present invention. The light shielding member 120 includes a light processing portion 123 and a light absorbing frame portion 125. A portion of the light emitted by the LED 110 and directed toward the light shielding member 120 passes through the light processing portion 123. The light absorbing frame portion 125 is connected to the outer periphery 124 of the light processing portion 123, and the light absorbing frame portion 125 is used to absorb the light directed toward the light absorbing frame portion 125. Figure 3 In the figure, the oblique lines drawn in the light absorbing frame portion 125 are only used to distinguish the light processing portion 123 from the light absorbing frame portion 125 and have no other special meaning.

[0032] In detail, the light processing part 123 has the property of penetrating part of the visible light and reflecting part of the visible light, that is, when the visible light is directed to the light shielding member 120, part of the visible light will penetrate the light processing part 123, and the other part of the visible light will be reflected by the light processing part 123. The reflectivity of the light processing part 123 can be greater than the transmittance, so as to avoid the light spot of the LED 110 being directly observed from the appearance of the direct-type backlight module 100 due to excessive energy directly above the LED 110. Preferably, the light processing part 123 has high reflectivity and low transmittance, for example, the reflectivity of the light processing part 123 can be 99% and the transmittance can be 1%, thereby improving the effect of avoiding the light spot of the LED 110 being directly observed from the appearance of the direct-type backlight module 100. The light absorbing frame part 125 has the property of absorbing visible light, for example, the light absorbing frame part 125 can be made of black material. That is, when the visible light is emitted toward the light absorbing frame portion 125 , the visible light will be absorbed by the light absorbing frame portion 125 .

[0033] Please also refer to Fig.10 , which is a schematic diagram of the optical path of LED 110, for the sake of simplicity, Fig.10 The diffuser plate 130 and the transparent carrier 150 are omitted. Fig.10In the figure, the shading member (not marked with a number) in part (A) has only a light processing portion 123, but no light absorbing frame portion 125 is provided, and the shading member 120 in part (B) is the shading member 120 disclosed in various embodiments of the present invention. As shown in part (A), when visible light is directed toward a shading member that does not have a light absorbing frame portion 125, a portion of the light E1 is directed toward the central area of ​​the light processing portion 123 of the shading member, and is transmitted through the central area of ​​the light processing portion 123, such as the light E1' indicated by the dotted arrow that continues the light E1, a portion of the light E2 is directed toward the peripheral area of ​​the light processing portion 123 of the shading member, and is transmitted through the peripheral area of ​​the light processing portion 123, such as the light E2' indicated by the dotted arrow that continues the light E2, a portion of the light E3 is not affected by the shading member and is directly emitted from the periphery of the shading member, and another portion of the light E4 is reflected between the peripheral area of ​​the light processing portion 123 and the circuit board 140 (it can be reflected once or multiple times, only once is shown here), and is emitted from the periphery of the shading member, such as the light E4' indicated by the dotted arrow that continues the light E4. Since the light rays E2 ′, E3 ′, and E4 ′ all pass through the peripheral area of ​​the light processing portion 123 or are emitted from the periphery of the light shielding element, it is easy to form a halo / ring around the periphery of the light shielding element. As shown in part (B), when visible light is directed toward the light shading member 120, a portion of the light E1 is directed toward the central area of ​​the light processing portion 123 of the light shading member 120, and passes through the central area of ​​the light processing portion 123, such as the light E1' shown by the dotted arrow extending from the light E1; a portion of the light E2 is directed toward the peripheral area of ​​the light processing portion 123 of the light shading member, and is absorbed by the light absorbing frame portion 125, so it is not easy to generate the light E2' in part (A); a portion of the light E3 is not affected by the light shading member 120 and is directly emitted from the periphery of the light shading member 120; as for the light E4 reflected between the peripheral area of ​​the light processing portion 123 and the circuit board 140 in part (A), it will collide with the peripheral area of ​​the light processing portion 123 in part (B) and be absorbed by the light absorbing frame portion 125, so it is not easy to generate the light E4' emitted from the periphery of the light shading member as shown in part (A). Fig.10 It can be seen that according to the light shielding member 120 of the present invention, the light absorbing frame portion 125 absorbs the light emitted to the peripheral area of ​​the light processing portion 123, so that the luminous energy of the light E2' and the light E4' can be effectively reduced, and only the light E3 is not affected by the light shielding member 120 and is directly emitted from the periphery of the light shielding member 120, thereby preventing the light from forming a halo / halo ring around the periphery of the light shielding member 120, making the energy distribution above the LED 110 uniform, and it is not easy to observe bright spots from the appearance of the direct-type backlight module 100. In other words, the light shielding member 120 can improve the brightness uniformity of the direct-type backlight module 100.

[0034] exist Figure 3In the figure, the shading member 120 is circular in shape, and the light absorbing frame portion 125 completely surrounds the outer periphery 124 of the light processing portion 123, that is, the light absorbing frame portion 125 is ring-shaped. Since the LED 110 has the property of a point light source, by setting the light absorbing frame portion 125 to a ring shape, it can correspond to the shape of the LED 110 to effectively avoid the generation of halo, and it is not easy to observe the bright spot from the appearance of the direct-type backlight module 100.

[0035] exist Figure 3 In the embodiment, the width of the light absorbing frame portion 125 is W, which can meet the following conditions: 1mm≥W>0mm. When the width is greater than 1mm, too much light in the peripheral area of ​​the light processing portion 123 will be absorbed, which will cause obvious darkening. Therefore, in this embodiment, the width W is limited to ≤1mm. In this way, on the one hand, the generation of halo can be effectively avoided, and on the other hand, the light absorbing frame portion 125 can be prevented from being seen from the outside of the direct-lit backlight module 100.

[0036] exist Figure 1 In the embodiment, the direct-type backlight module 100 further includes a transparent carrier 150, which is disposed above the LED 110, and a light shielding member 120 is disposed on a surface 152 of the transparent carrier 150 away from the LED 110. However, the present invention is not limited thereto. In other embodiments, the light shielding member 120 may be disposed on a surface 151 of the transparent carrier 150 facing the LED 110. The aforementioned "transparent" means having a high transmittance to visible light. For example, the transmittance of the transparent carrier 150 to visible light may be greater than 90%. The transparent carrier 150 is used to carry the light shielding member 120, and an appropriate material may be selected according to actual needs. For example, the material of the transparent carrier 150 may be, but is not limited to, polycarbonate (PC), glass, or acrylic. In the present embodiment, the light shielding member 120 is an independent component, and the material of the light absorbing frame portion 125 is black adhesive, whereby the light shielding member 120 may be fixed to the transparent carrier 150 through the light absorbing frame portion 125. However, the present invention is not limited thereto. In other embodiments, different inks may be used to print the light processing portion 123 and the light absorbing frame portion 125 on the transparent carrier 150 to form the light shielding member 120 .

[0037] Please also refer to Figure 2 , which is Figure 1 The enlarged schematic diagram of the A part in the figure. Figure 2As shown, the size of the shading member 120 is larger than the size of the LED 110. The aforementioned "the size of the shading member 120 is larger than the size of the LED 110" means that when looking down from the top of the direct-type backlight module 100, the LED 110 will be completely covered by the shading member 120. Thereby, when assembling the direct-type backlight module 100, the accuracy requirements for the alignment of the LED 110 and the shading member 120 are relatively low, which is beneficial to improving production efficiency and finished product yield. Preferably, when the length of the shading member 120 is L, the length of the LED 110 is D, the radiation angle of the LED 110 is θ, and the spacing distance between the shading member 120 and the LED 110 is H, it can meet the following conditions: L≥D+2×H×tanθ. More preferably, it can meet the following conditions: L≥2D. In detail, if Figure 2 As shown, the length of the shading member 120 is equal to the sum of the first length L1, the length of the LED 110 and the second length L2, that is, L=L1+D+L2, where L1=H×tanθ. When the center line of the LED 110 is aligned with the center line of the shading member 120, L1=L2, and it can be deduced that L=D+2×H×tanθ. In other embodiments, the center line of the LED 110 may slightly deviate from the center line of the shading member 120 so that L1≠L2. Alternatively, in other embodiments, when the luminous energy of the LED 110 is larger and the halo effect is more obvious, a shading member 120 with a larger area may be used. In this case, L>D+2×H×tanθ. In this embodiment, the shape of the shading member 120 is circular, and the shape of the LED 110 is square. Therefore, L may be the diameter of the shading member 120, and D may be the side length of the LED 110. However, the present invention is not limited thereto, and the shading member 120 and the LED 110 may be configured in other shapes according to actual needs. L may be the length of the shading member 120 in any direction, and D may be the length of the LED 110 in any direction.

[0038] Please continue to refer to Figure 1 , the spacing distance between the shading member 120 and the LED 110 is H, which can meet the following conditions: 3mm≥H≥0.5mm. In more detail, H is the spacing distance between the lower surface 121 of the shading member 120 and the upper surface 112 of the LED 110. Since the LED 110 will generate high heat while emitting light, in order to prevent the high heat of the LED 110 from causing the material of the shading member 120 above it to change and affect its transmittance and reflectivity, H≥0.5mm is designed in this embodiment, which can effectively avoid the generation of halo and prevent the shading member 120 from being damaged by the temperature of the LED 110. On the other hand, if the spacing distance between the shading member 120 and the LED 110 is too far, the shading member 120 cannot effectively shield the light field generated by the LED 110, and a dark shadow gradually appears. Therefore, H≤3mm is designed in this embodiment.

[0039] exist Figure 1 , the spacing distance between the shading member 120 and the diffusion plate 130 is M, which can meet the following conditions: M≥3mm. In more detail, M is the spacing distance between the upper surface 122 of the shading member 120 and the lower surface 131 of the diffusion plate 130. This spacing distance M is usually called the light mixing distance, which determines the main thickness of the direct-type backlight module 100. Although increasing the spacing distance M can improve the brightness uniformity of the direct-type backlight module 100, it causes an increase in thickness. In this embodiment, through the design of the light processing part 123 and the light absorbing frame part 125 of the shading member 120, the energy distribution above the LED 110 can be uniform, and it is not easy to observe the bright spot from the appearance of the direct-type backlight module 100, thereby improving the brightness uniformity of the direct-type backlight module 100, thereby reducing the spacing distance M to 3mm at most, achieving the technical effect of thinning the thickness of the direct-type backlight module 100.

[0040] exist Figure 1 In the embodiment, the direct-lit backlight module 100 may optionally further include other optical elements, such as a reflective sheet, etc., to enhance the optical properties.

[0041] Please refer to Figure 4 , which is a plan view of a light-shielding member 120a according to another embodiment of the present invention. The light-shielding member 120a includes a light-processing portion 123a and at least one light-absorbing frame portion 125a, and the light-absorbing frame portion 125a is connected to the outer periphery 124a of the light-processing portion 123a. The outer periphery 124a of the light-processing portion 123a forms at least one notch 126a, and at least one edge 127a of the notch 126a is not provided with the light-absorbing frame portion 125a. In detail, in this embodiment, the number of notches 126a is three and they are arranged at equal angles, the number of light-absorbing frame portions 125a is three and they are arranged at equal angles, and the light-absorbing frame portion 125a and the notch 126a are arranged at intervals, that is, the light-absorbing frame portion 125a and the notch 126a are staggered with each other. By providing the notch 126a, the light penetration of the LED can be controlled, which is beneficial to take into account the front brightness and appearance requirements of the direct-type backlight module.

[0042] Please refer to Figure 5 and Figure 6, which are respectively plan schematic diagrams of light shielding members 120b and 120c according to another embodiment of the present invention, wherein the light shielding members 120b and 120c respectively include a light processing portion 123b and 123c and at least one light absorbing frame portion 125b and 125c, and the light absorbing frame portion 125b and 125c are connected to the outer periphery 124b and 124c of the light processing portion 123b and 123c. The outer periphery 124b and 124c of the light processing portion 123b and 123c forms at least one notch 126b and 126c, and at least one edge 127b and 127c of the notch 126b and 126c is not provided with the light absorbing frame portion 125b and 125c. In detail, the difference between the light shielding members 120b and 120c and the light shielding member 120a is that the shapes of the notches 126b and 126c are different from those of the notch 126a. Compared to the notch 126a of the shading member 120a, the notch 126b of the shading member 120b is narrower and longer, and compared to the notch 126b of the shading member 120b, the notch 126c of the shading member 120c is even narrower and longer. Therefore, for LEDs with lower luminous energy, more light in the central area close to the light processing portion 123b is not reflected by the light processing portion 123b but directly penetrates through the notch 126b, so that the light energy is evenly distributed without the situation where the center is too dark.

[0043] exist Figures 4 to 6 In the figure, the number of the notches 126a, 126b, and 126c are all three, all are substantially rectangular, and all are set at equal angles. However, this is only an example, and the present invention is not limited to this. In other embodiments, the number, shape, and arrangement of the notches can be adjusted according to actual needs. For example, the number of the notches can be only one, and for another example, the shape of the notches can be substantially triangular. For another example, the number of the notches can be multiple but the angles between the notches are not fixed.

[0044] Please refer to Figure 7 and Figure 8 , Figure 7 is a cross-sectional schematic diagram of a direct-lit backlight module 100a according to another embodiment of the present invention. Figure 8 yes Figure 7 The enlarged diagram of the B part. Figure 1 In the direct-lit backlight module 100a, the light shielding member 120 is disposed on a surface 151 of the transparent carrier 150 facing the LED 110. For other details of the direct-lit backlight module 100a and the definitions of the parameters M, H, L, D, θ, please refer to the above text and will not be elaborated here.

[0045] Please refer to Fig. 9, which is a cross-sectional schematic diagram of a display device 10 according to an embodiment of the present invention. The display device 10 includes a direct-type backlight module 100 and a display panel 200, and the display panel 200 is disposed above the direct-type backlight module 100. The direct-type backlight module 100 is used to provide light to the display panel 200, and the display panel 200 can be an LCD panel. For details about the direct-type backlight module 100, please refer to the above text and will not be repeated here.

[0046] Compared with the prior art, the present invention can avoid directly observing the light spot of the LED from the appearance of the direct-type backlight module with the help of the light processing part of the shading member, and can effectively avoid the formation of halos with the help of the light-absorbing frame part of the shading member, thereby making the energy distribution above the LED uniform and making it difficult to observe the bright spot from the appearance of the direct-type backlight module, thereby improving the brightness uniformity of the direct-type backlight module.

[0047] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

[0048] [List of Reference Numerals]

[0049] 100, 100a: Direct-lit backlight module

[0050] 110: LED

[0051] 111: Lower surface

[0052] 112: Upper surface

[0053] 120, 120a, 120b, 120c: light shielding member

[0054] 121: Lower surface

[0055] 122: Upper surface

[0056] 123, 123a, 123b, 123c: optical processing unit

[0057] 124, 124a, 124b, 124c: outer periphery

[0058] 125, 125a, 125b, 125c: light-absorbing frame

[0059] 126a, 126b, 126c: gap

[0060] 127a, 127b, 127c: Edge

[0061] 130: Diffuser

[0062] 131: Lower surface

[0063] 140: Circuit board

[0064] 150: Transparent carrier

[0065] 151, 152: Surface

[0066] 200: Display panel

[0067] A, B: Part

[0068] D: The length of the LED

[0069] E1, E2, E3, E4, E1', E2', E3', E4': light

[0070] H: The distance between the shading element and the LED

[0071] L: Length of the shading element

[0072] L1: first length

[0073] L2: Second length

[0074] M: The distance between the shading element and the diffuser

[0075] W: Width of the light-absorbing frame

[0076] θ: The radiation angle of the LED.

Claims

1. A direct-type backlight module, characterized in that: Include: at least one light emitting diode; A shading member is disposed above the light emitting diode and corresponds to the light emitting diode. The size of the shading member is larger than the size of the light emitting diode. The shading member comprises: a light processing part, through which a part of the light emitted by the light emitting diode and directed toward the light shielding member is transmitted; as well as A light absorbing frame portion, connected to the outer periphery of the light processing portion, for absorbing light incident on the light absorbing frame portion; as well as A diffusion plate is disposed above the light shielding member, wherein The reflectivity of the light processing part is greater than the transmittance.

2. The direct-type backlight module according to claim 1, characterized in that: Also includes: The transparent carrier is arranged above the light emitting diode, and the light shielding member is arranged on the surface of the transparent carrier facing the light emitting diode or the surface away from the light emitting diode.

3. The direct-lit backlight module according to claim 1, characterized in that: The shape of the shading element is circular.

4. The direct-lit backlight module according to claim 1, characterized in that: The light absorbing frame portion completely surrounds the outer periphery of the light processing portion.

5. The direct-lit backlight module according to claim 1, characterized in that: The outer periphery of the light processing portion forms a notch, and at least one edge of the notch is not provided with the light absorbing frame portion.

6. The direct-lit backlight module according to claim 1, characterized in that: The outer periphery of the light processing part forms a plurality of notches, and the light shielding member includes a plurality of light absorbing frame parts, and the plurality of light absorbing frame parts are spaced apart from the plurality of notches.

7. The direct-lit backlight module according to claim 1, characterized in that: A plurality of notches are formed on the outer periphery of the optical processing portion, and the plurality of notches are arranged at equal angles.

8. The direct-lit backlight module according to claim 1, characterized in that: The length of the shading member is L, the length of the light emitting diode is D, the radiation angle of the light emitting diode is θ, and the spacing distance between the shading member and the light emitting diode is H, which satisfies the following conditions: L≥D+2×H×tanθ.

9. The direct-lit backlight module according to claim 1, characterized in that: The width of the light-absorbing frame portion is W, which satisfies the following conditions: 1mm≥W>0mm.

10. The direct-lit backlight module according to claim 1, characterized in that: The distance between the light shielding member and the light emitting diode is H, which satisfies the following conditions: 3mm≥H≥0.5mm.

11. A display device, characterized in that: Include: The direct-lit backlight module according to any one of claims 1 to 10; and The display panel is arranged above the direct-type backlight module.

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