LED display screen

Abstract

The LED display screen comprises a lamp panel, a plurality of light-emitting elements arranged on the lamp panel and a power module, each light-emitting element comprises a shell, a red light chip, a green light chip and a blue light chip, the red light chip, the green light chip and the blue light chip are arranged in the shell, the threshold voltage of the red light chip has a first gear to an Nth gear, and the threshold voltage of the green light chip has a second gear to an Nth gear. The threshold voltage of the green light chip and the blue light chip has a first gear to an Nth gear, the threshold voltage corresponding to each gear is different, and the red light chip, the green light chip and the blue light chip of which the threshold voltage is in the same gear are packaged in a shell to form first to Nth light-emitting elements; the power module is provided with first to Nth power output ends, the first to Nth power output ends are electrically connected with the first to Nth light-emitting elements respectively to drive the first to Nth light-emitting elements to emit light, and N is a positive integer larger than or equal to 2. The LED display screen has a strong energy-saving effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to display technical field, especially a kind of LED display screen. BACKGROUND

[0002] LED (light-emitting diode) display screen is internally packaged with multiple light-emitting elements, and the light-emitting elements are internally packaged with red light chips, green light chips and blue light chips to emit red light, green light and blue light respectively, which can use the principle of three primary colors to make the light-emitting elements emit different colors of light. The threshold voltages of the red light chips, green light chips and blue light chips in the light-emitting elements are inconsistent. If you want to drive the corresponding chips to emit light, the driving voltage must be greater than the corresponding threshold voltage.

[0003] In related technologies, the LED display screen is driven by the same driving voltage. Therefore, when driving the light-emitting elements to emit light, the driving voltage must be greater than the highest threshold voltage among all the chips, which will cause high energy consumption and is not conducive to energy saving. SUMMARY

[0004] The utility model aims at providing a kind of LED display screen, which can effectively reduce energy consumption.

[0005] To solve the above technical problems, the utility model provides a kind of LED display screen, comprising:

[0006] A lamp panel;

[0007] A plurality of light-emitting elements disposed on the lamp panel, the light-emitting elements include a housing and red light chips, green light chips and blue light chips disposed in the housing, the red light chips, green light chips and blue light chips correspond to emit red light, green light and blue light respectively, the threshold voltage of the red light chips has a first to Nth grade, the threshold voltage of the green light chips and blue light chips has a first to Nth grade, the threshold voltage corresponding to each grade is different, and the red light chips, green light chips and blue light chips with threshold voltage in the same grade are packaged in one housing to form first to Nth light-emitting elements;

[0008] A power module has first to Nth power output terminals, the first to Nth power output terminals are electrically connected to the first to Nth light-emitting elements respectively to drive the first to Nth light-emitting elements to emit light, and N is a positive integer greater than or equal to 2.

[0009] In one exemplary embodiment of the present disclosure,

[0010] The lamp panel includes first to Nth mounting areas, the first to Nth light-emitting elements are correspondingly disposed in the first to Nth mounting areas, and the first to Nth power output terminals are electrically connected to the first to Nth light-emitting elements disposed in the first to Nth mounting areas respectively.

[0011] In one exemplary embodiment of the present disclosure,

[0012] The N is 2, the threshold voltage of the red light chip has a first and second gear, the threshold voltage of the green light chip and the blue light chip has a first and second gear, the red light chip, the green light chip and the blue light chip with threshold voltage in the first gear are packaged in one of the shell to form a first light emitting element, the red light chip, the green light chip and the blue light chip with threshold voltage in the second gear are packaged in one of the shell to form a second light emitting element, the plurality of light emitting elements include a plurality of first light emitting elements and a plurality of second light emitting elements;

[0013] The power module has a first power output and a second power output, the first power output and the second power output are respectively connected with the plurality of first light emitting elements and the plurality of second light emitting elements, the lamp panel includes a first mounting area and a second mounting area, the plurality of first light emitting elements are arranged in the first mounting area, and the plurality of second light emitting elements are arranged in the second mounting area.

[0014] In one exemplary embodiment of the present disclosure,

[0015] The threshold voltage of the red light chip in the first gear is V1, then 1.8V≤V1≤2.0V, the threshold voltage of the green light chip and the blue light chip in the first gear is V2, then 2.8V≤V2≤3.0V.

[0016] In one exemplary embodiment of the present disclosure,

[0017] The threshold voltage of the red light chip in the second gear is V3, then 2.0V

[0018] In one exemplary embodiment of the present disclosure,

[0019] The shell forms a light emitting surface at one end away from the lamp panel, and the light generated by the light emitting element is emitted outward through the light emitting surface;

[0020] The light emitting element further includes a lens, the lens is arranged on the shell and covers the light emitting surface to converge the light emitted from the light emitting surface.

[0021] In one exemplary embodiment of the present disclosure,

[0022] The lens is a convex lens with convex surface away from the shell.

[0023] In one exemplary embodiment of the present disclosure,

[0024] The lens is formed by curing it to the light-emitting surface with glue.

[0025] In one exemplary embodiment of this disclosure,

[0026] The plurality of light-emitting elements are arranged in a rectangular array on the lamp board, and the red light chip, green light chip and blue light chip are sequentially disposed inside the housing;

[0027] In two adjacent light-emitting elements in the same row or column, the first light-emitting element rotates around its center as a rotation axis, rotates by a preset angle in a preset rotation direction, and then translates by a preset distance to coincide with the second light-emitting element.

[0028] In one exemplary embodiment of this disclosure,

[0029] The preset rotation direction of the light-emitting elements in each row and each column is the same.

[0030] As can be seen from the above technical solution, the beneficial effects of this utility model are as follows:

[0031] In this application, by pre-dividing the light-emitting chips into multiple levels according to their threshold voltage, it is possible to directly select the light-emitting chip with the threshold voltage corresponding to the corresponding level during production, and package it into the lamp board. Then, the power module outputs the driving voltage. Since the threshold voltage of the light-emitting chip is known, the driving voltage can be matched accordingly, so as to set the driving voltage in a targeted manner. This avoids the need for the driving voltage to be greater than the highest threshold voltage among all light-emitting chips. While ensuring that the light-emitting element is lit, its power is reduced, thereby achieving the effect of energy saving. Attached Figure Description

[0032] Figure 1 This is a schematic block diagram of the LED display screen in the embodiments of this application.

[0033] Figure 2 This is a schematic diagram of the structure of the light-emitting element in the embodiments of this application.

[0034] Figure 3 This is a schematic diagram of the arrangement of light-emitting elements in an embodiment of this application.

[0035] The annotations in the attached figures are explained as follows:

[0036] Lamp board 1, first mounting area 10, second mounting area 11, light-emitting element 2, first light-emitting element 20, second light-emitting element 21, power module 3, first power output terminal 30, first power red light output terminal 300, first power green and blue light output terminal 301, second power output terminal 31, second power red light output terminal 310, second power green and blue light output terminal 311, red light chip 40, green light chip 41, blue light chip 42, housing 50, lens 51. Detailed Implementation

[0037] Typical embodiments embodying the features and advantages of this utility model will be described in detail in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0038] In the description of this application, it should be understood that, in the embodiments shown in the accompanying drawings, the indications of direction or positional relationships (such as up, down, left, right, front, and back) are merely for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the accompanying drawings. If the description of the positions of these elements changes, these directional indications also change accordingly.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] As LED displays become increasingly widespread, the market is paying more and more attention to their energy efficiency. The main energy-consuming component of an LED display is the light-emitting element. The threshold voltages of the red, green, and blue light-emitting chips within this element differ, resulting in different driving voltages required to drive them. In related technologies, when packaging the light-emitting elements onto a lamp board, the threshold voltages of the chips are not differentiated; the threshold voltages of the chips in the lamp board range from low to high. However, since the LED display is driven by a single driving voltage, the driving voltage used to drive it to emit light must be greater than the highest threshold voltage among all the chips. This leads to high energy consumption and is not energy-efficient. To address this problem, this application proposes an LED display.

[0041] Based on this, see Figure 1 This application provides an LED display screen, which includes a lamp board 1, a plurality of light-emitting elements 2 disposed on the lamp board 1, and a power module 3. The lamp board 1 is used to support the light-emitting elements 2 and is electrically connected to them, and the power module 3 is used to supply power to the light-emitting elements 2.

[0042] In some embodiments, the light-emitting element 2 includes a housing 50 and a light-emitting chip disposed within the housing 50. The light-emitting chip includes a red light chip 40, a green light chip 41, and a blue light chip 42. The housing 50 forms a cavity with an opening at one end. The red light chip 40, green light chip 41, and blue light chip 42 are encapsulated within the cavity. The red light chip 40, green light chip 41, and blue light chip 42 are wafers composed of P-type semiconductors and N-type semiconductors. When the P-type semiconductors and N-type semiconductors are in contact, they form a PN junction. When an electric current flows through the wafer, electrons flow from the N-region to the P-region, recombine with holes in the P-region, release energy, and emit light in the form of photons. The color of the emitted light is determined by the material of the formed PN junction. Materials with different band gaps will produce different colors of light. For example, the red light chip 40 produces red light, the green light chip 41 produces green light, and the blue light chip 42 produces blue light.

[0043] It should be noted that the LED will only emit light when the voltage applied to it reaches a certain value; this voltage is defined as the threshold voltage, also known as the turn-on voltage. The threshold voltage varies depending on the type and material of the LED. Furthermore, in a circuit, due to voltage drops and voltage division by other components, the driving voltage for the LED usually needs to be greater than its threshold voltage. The threshold voltage is a range; as long as the voltage is within this range, the LED can be turned on and emit light.

[0044] In some embodiments, the threshold voltage of the red light chip 40 is typically between 1.8V and 2.2V, while the threshold voltages of the green light chip 41 and the blue light chip 42 are the same, typically between 2.8V and 3.3V.

[0045] In some embodiments, the light-emitting chips can be divided into multiple levels based on their threshold voltage. For example, the threshold voltage of the red light chip 40 can be divided into levels one to N, and the threshold voltages of the green light chip 41 and the blue light chip 42 can be divided into levels one to N, with each level corresponding to a different threshold voltage. That is, the range of threshold voltage values ​​can be divided into multiple subsets, with the threshold voltage in each subset set as one level. N subsets constitute N levels, where N is a positive integer greater than or equal to 2. For ease of understanding, as the number of levels increases, the threshold voltage value becomes higher. For example, the threshold voltage of a light-emitting chip in the second level is greater than the threshold voltage of a light-emitting chip in the first level. At the same time, as the number of levels increases, the range of the corresponding subsets becomes finer.

[0046] It should be noted that during the production of light-emitting chips, due to limitations in the manufacturing process, the threshold voltage of the produced chips is variable. When the chips are inspected by a machine, their threshold voltage can be obtained and archived. Therefore, when the light-emitting chips are packaged into the housing 50, red light-emitting chip 40, green light-emitting chip 41, and blue light-emitting chip 42, which have threshold voltages at the same level, are packaged together in one housing 50 to form the first to Nth light-emitting elements.

[0047] Understandably, the first light-emitting element 20 is packaged with a first-level red light chip 40, a green light chip 41, and a blue light chip 42. The second light-emitting element 21 is packaged with a second-level red light chip 40, a green light chip 41, and a blue light chip 42. And so on, the Nth light-emitting element is packaged with an Nth-level red light chip 40, a green light chip 41, and a blue light chip 42.

[0048] Therefore, the multiple light-emitting elements 2 disposed on the lamp board 1 may include multiple first light-emitting elements 20, second light-emitting elements 21, and / or an Nth light-emitting element 2. Correspondingly, the power module 3 has first to Nth power output terminals, which are electrically connected to the first to Nth light-emitting elements respectively to drive the first to Nth light-emitting elements 2 to emit light. In this embodiment, the light-emitting elements 2 are divided according to the different levels of the light-emitting chips encapsulated inside them. The threshold voltage of the light-emitting chips of different levels is different, so that the driving voltage of the power output terminal in the power module 3 can be adapted accordingly when driving the corresponding light-emitting element 2. For example, its first power output terminal 30 is electrically connected to the first light-emitting element 20 to provide a driving voltage to drive the first light-emitting element 20 to emit light. Since the first light-emitting element 20 is encapsulated with light-emitting chips of the first level, its corresponding threshold voltage is the lowest, so the driving voltage to drive it can also be lower, thereby reducing the power required to drive this part of the first light-emitting elements 20, and thus achieving the purpose of energy saving.

[0049] In this embodiment, by pre-dividing the light-emitting chips into multiple levels according to their threshold voltage, it is possible to directly select the light-emitting chip with the threshold voltage corresponding to the corresponding level during production, and encapsulate it into the lamp board 1. Then, the power module 3 is used to output the driving voltage. Since the threshold voltage of the light-emitting chip is known, the driving voltage can be matched accordingly, so as to set the driving voltage in a targeted manner, thereby avoiding the need for the driving voltage to be greater than the highest value of the threshold voltage among all light-emitting chips.

[0050] In some embodiments, the lamp board 1 includes first to Nth mounting areas, and first to Nth light-emitting elements 2 are correspondingly disposed in the first to Nth mounting areas. The first to Nth power output terminals are respectively electrically connected to the first to Nth light-emitting elements 2 disposed in the first to Nth mounting areas. By dividing the lamp board 1 into different mounting areas to correspondingly set light-emitting elements 2 at different levels, it is possible to directly place the light-emitting element 2 at a certain level in the corresponding mounting area when encapsulating the lamp board 1. This reduces wiring difficulty and facilitates marking by workers for encapsulation.

[0051] In some embodiments, to facilitate wiring and reduce circuit complexity, N is set to 2, meaning it is divided into two levels based on the threshold voltage. Of course, N can also be 3 or 4, etc. Thus, the threshold voltage of the red light chip 40 has one and two levels, and the threshold voltages of the green light chip 41 and the blue light chip 42 also have one and two levels. The red light chip 40, green light chip 41, and blue light chip 42 with threshold voltage at level one are packaged in a housing 50 to form a first light-emitting element 20. The red light chip 40, green light chip 41, and blue light chip 42 with threshold voltage at level two are packaged in a housing 50 to form a second light-emitting element 21. The plurality of light-emitting elements 2 includes a plurality of first light-emitting elements 20 and a plurality of second light-emitting elements 21.

[0052] Correspondingly, the power module 3 has a first power output terminal 30 and a second power output terminal 31, and the lamp board 1 includes a first mounting area 10 and a second mounting area 11. The first power output terminal 30 and the second power output terminal 31 are electrically connected to a plurality of first light-emitting elements 20 and a plurality of second light-emitting elements 21, respectively. The plurality of first light-emitting elements 20 are disposed in the first mounting area 10, and the plurality of second light-emitting elements 21 are disposed in the second mounting area 11.

[0053] In some embodiments, the first power output terminal 30 may include a first power red light driving output terminal and a first power green and blue light driving output terminal. The first power red light output terminal 300 is electrically connected to the red light chip 40 in the first light-emitting element 20 located in the first mounting area 10 to drive it to emit light. The first power green and blue light driving output terminal is electrically connected to the green light chip 41 and the blue light chip 42 located in the first mounting area 10 to drive them to emit light.

[0054] In some embodiments, the second power output terminal 31 may include a second power red light driving output terminal and a second power green and blue light driving output terminal. The second power red light output terminal 310 is electrically connected to the red light chip 40 in the second light-emitting element 21 located in the second mounting area 11 to drive it to emit light. The second power green and blue light driving output terminal is electrically connected to the green light chip 41 and the blue light chip 42 located in the second mounting area 11 to drive them to emit light.

[0055] In some embodiments, the first mounting area 10 and the second mounting area 11 can divide the lamp panel 1 in half, with one half of the lamp panel 1 being the first mounting area 10 and the other half being the second mounting area 11. Of course, the areas of the two can also be different.

[0056] In some embodiments, when encapsulating the lamp board 1, since both first-grade and second-grade light-emitting chips are present in the incoming materials, the first-grade light-emitting chips can be selected and encapsulated to form a first light-emitting element 20, and the second-grade light-emitting chips can be encapsulated to form a second light-emitting element 21. Then, all the first light-emitting elements 20 are disposed in the first mounting area 10, and all the second light-emitting elements 21 are disposed in the second mounting area 11.

[0057] In some embodiments, the threshold voltage of the red light chip 40 in the first stage is set to V1, then 1.8V≤V1≤2.0V; the threshold voltage of the green light chip 41 and blue light chip 42 in the first stage is set to V2, then 2.8V≤V2≤3.0V. The threshold voltage of the red light chip 40 in the second stage is set to V3, then 2.0V<V3≤2.2V; the threshold voltage of the green light chip 41 and blue light chip 42 in the second stage is set to V4, then 3.1V≤V4≤3.3V.

[0058] The first power output terminal 30 is electrically connected to the first light-emitting element 20. Since the threshold voltage within the first light-emitting element 20 is lower than its highest value, the driving voltage output by the first power output terminal 30 is correspondingly lower. In this embodiment, considering voltage drop and voltage division by other components, the driving voltage output by the first power output terminal 30 for the red light chip 40 can be 2.6V, and the driving voltage output for the green light chip 41 and the blue light chip 42 can be 3.6V. The second power output terminal 31 is electrically connected to the second light-emitting element 21. Since the threshold voltage within the second light-emitting element 21 is at a higher value, the driving voltage output by the second power output terminal 31 can be 2.8V for the red light chip 40 and 3.8V for the green light chip 41 and the blue light chip 42, compared to the first power output terminal 30. When the red light chip 40, green light chip 41 and blue light chip 42 are driven through the first power output terminal 30, the driving voltage can be reduced by 0.2V compared with the highest driving voltage. Since the LED display screen adopts constant current driving, the power will be reduced, thereby achieving the purpose of energy saving.

[0059] In some embodiments, while reducing the light-emitting power of the light-emitting element 2, the light-emitting intensity of a single light-emitting element 2 can be increased by adding a lens 51 to avoid affecting its light-emitting brightness.

[0060] See also Figure 2Specifically, the end of the housing 50 facing away from the lamp panel 1 has a light-emitting surface, through which the light generated by the light-emitting element 2 is emitted outward. The light-emitting element 2 also includes a lens 51, which is disposed on the housing 50 and covers the light-emitting surface to converge the light emitted from the light-emitting surface, narrowing the light emission angle from the light-emitting surface, thereby increasing the luminous intensity within the visible angle and improving the brightness of the light-emitting element 2. The light-emitting surface is the plane containing the opening end of the cavity formed by the housing 50.

[0061] In some embodiments, the bottom of the housing 50 is provided with pins, and the light-emitting chip inside the housing 50 is electrically connected to the lamp board 1 through the pins.

[0062] In some embodiments, lens 51 is a convex lens with its convex surface facing away from the housing 50. The convex lens has the function of converging light. By placing the convex lens on the light-emitting surface, light rays emitted from the edge of the convex lens are refracted towards the normal direction, thereby increasing the brightness in the normal direction and achieving the effect of increasing the light emission intensity. It should be noted that the smaller the radius of curvature, thickness, and focal length of the convex lens, the stronger its light-converging effect. Therefore, the larger the curvature of the convex lens, the stronger the effect of increasing the light emission intensity.

[0063] In some embodiments, the lens 51 is fixed to the light-emitting surface with adhesive to improve the connection strength without affecting the emission of light.

[0064] In some embodiments, due to the light-gathering effect of lens 51, although the light emission angle of a single primary color is narrowed, the relative positions of red light chip 40, green light chip 41 and blue light chip 42 with lens 51 are different, resulting in different light patterns for each primary color. After mixing, color distortion may occur at certain angles.

[0065] See also Figure 3 Therefore, in this embodiment, multiple light-emitting elements 2 are arranged in a rectangular array on the lamp panel 1, and red light chip 40, green light chip 41 and blue light chip 42 are sequentially disposed within the housing 50. For example, the red light chip 40, green light chip 41 and blue light chip 42 are disposed at intervals along the same straight line within the housing 50, with the green light chip 41 located between the red light chip 40 and the blue light chip 42, and the three can mix light to form white light.

[0066] In some embodiments, among two adjacent light-emitting elements 2 in the same row or column, the first light-emitting element 2 rotates around its center as a rotation axis, rotates by a preset angle in a preset rotation direction, and then translates by a preset distance to coincide with the second light-emitting element 2. By adjusting the placement direction of each light-emitting element 2 in this way, it can be ensured that each edge position of the LED display screen is not occupied by the same type of light-emitting element 2, thereby ensuring that no color distortion problem occurs when the user looks at the LED display screen from different angles.

[0067] In some embodiments, the preset rotation direction can be clockwise or counterclockwise, and the preset angle can be any suitable angle, such as 45°, 60°, 90°, 135° or 180°, etc. The smaller the preset angle, the finer the light mixing and the better the effect.

[0068] In some embodiments, the preset rotation directions of the light-emitting elements 2 in each row are the same, and the preset rotation directions of the light-emitting elements 2 in each column are the same. See also Figure 3 In this embodiment, the preset rotation direction of each row of light-emitting elements 2 is counterclockwise, and the preset rotation direction of each column of light-emitting elements 2 is also counterclockwise, with a preset angle of 90°. By arranging the light-emitting elements in this way, the color temperature accuracy can be improved at different viewing angles after light mixing, the color deviation problem can be greatly reduced, and the display effect can be improved.

[0069] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. An LED display screen, characterized in that, include: Light panel; Multiple light-emitting elements are disposed on the lamp board. Each light-emitting element includes a housing and a red light chip, a green light chip, and a blue light chip disposed within the housing. The red light chip, green light chip, and blue light chip emit red light, green light, and blue light respectively. The threshold voltage of the red light chip has one to N levels, and the threshold voltage of the green light chip and the blue light chip also has one to N levels. Each level corresponds to a different threshold voltage. Red light chips, green light chips, and blue light chips with the same threshold voltage are packaged in the housing to form the first to Nth light-emitting elements. The power module has a first to an Nth power output terminal, which are electrically connected to the first to an Nth light-emitting element to drive the first to an Nth light-emitting element to emit light, where N is a positive integer greater than or equal to 2.

2. The LED display screen according to claim 1, characterized in that, The lamp panel includes a first to an Nth mounting area, and the first to an Nth light-emitting elements are correspondingly disposed in the first to an Nth mounting area. The first to an Nth power output terminals are respectively electrically connected to the first to an Nth light-emitting elements disposed in the first to an Nth mounting area.

3. The LED display screen according to claim 2, characterized in that, The N is 2. The threshold voltage of the red light chip has one level and two levels. The threshold voltage of the green light chip and the blue light chip has one level and two levels. The red light chip, green light chip and blue light chip with the threshold voltage at level one are packaged in the housing to form a first light-emitting element. The red light chip, green light chip and blue light chip with the threshold voltage at level two are packaged in the housing to form a second light-emitting element. The plurality of light-emitting elements includes a plurality of first light-emitting elements and a plurality of second light-emitting elements. The power module has a first power output terminal and a second power output terminal, which are electrically connected to the plurality of first light-emitting elements and the plurality of second light-emitting elements, respectively. The lamp board includes a first mounting area and a second mounting area, with the plurality of first light-emitting elements disposed in the first mounting area and the plurality of second light-emitting elements disposed in the second mounting area.

4. The LED display screen according to claim 3, characterized in that, The threshold voltage for the red light chip in the first category is set to V1, then 1.8V≤V1≤2.0V. The threshold voltage for the green and blue light chips in the first category is set to V2, then 2.8V≤V2≤3.0V.

5. The LED display screen according to claim 3, characterized in that, The threshold voltage for the red light chip in the second stage is set to V3, then 2.0V < V3 ≤ 2.2V. The threshold voltage for the green and blue light chips in the second stage is set to V4, then 3.1V ≤ V4 ≤ 3.3V.

6. The LED display screen according to claim 1, characterized in that, The end of the housing facing away from the lamp panel forms a light-emitting surface, and the light generated by the light-emitting element is emitted outward through the light-emitting surface; The light-emitting element also includes a lens, which is disposed on the housing and covers the light-emitting surface to converge the light emitted from the light-emitting surface.

7. The LED display screen according to claim 6, characterized in that, The lens is a convex lens with its convex surface facing away from the housing.

8. The LED display screen according to claim 6, characterized in that, The lens is formed by curing it to the light-emitting surface with glue.

9. The LED display screen according to claim 1, characterized in that, The plurality of light-emitting elements are arranged in a rectangular array on the lamp board, and the red light chip, green light chip and blue light chip are sequentially disposed inside the housing; In two adjacent light-emitting elements in the same row or column, the first light-emitting element rotates around its center as a rotation axis, rotates by a preset angle in a preset rotation direction, and then translates by a preset distance to coincide with the second light-emitting element.

10. The LED display screen according to claim 9, characterized in that, The preset rotation direction of the light-emitting elements in each row and each column is the same.

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