Small light source hazard assessment method and purple light LED backlight module

Abstract

The invention discloses a small light source hazard assessment method and a purple light LED backlight module, and relates to the field of LED lamps. The purple light LED backlight module comprises a frame unit, an installation unit is arranged in the frame unit, a light bar unit is installed on the installation unit, the installation unit comprises a back plate and multiple sets of connecting assemblies, the connecting assemblies are arranged on the back plate, each connecting assembly comprises a sliding block, a positioning block, a fastening block and a fixing mechanism, the sliding blocks are slidably connected into the back plate, and the positioning blocks are arranged on the back plate. The positioning block is cylindrical and fixedly connected to the sliding block, the fastening block is a rectangular block and rotationally connected to the positioning block, and the fixing mechanism is arranged in the sliding block. According to the purple light LED backlight module, the lamp strip can be assembled and disassembled by rotating the fastening block, so that the lamp strip is convenient to assemble and disassemble, the LED lamp strip is easy to replace when going wrong, the density of the LED lamp strip can be changed, and different light emitting effects can be generated on the purple light LED backlight module according to the requirements of users.

Description

Technical Field

[0001] The present invention relates to the technical field of LED lamps, and specifically to a method for evaluating the hazards of small light sources and a violet LED backlight module. Background Art

[0002] An LED backlight module, fully known as an LED backlight display module, is a module that uses LEDs as light sources and adjusts the light transmission degree through the control of a liquid crystal screen to achieve a display effect. The LED backlight module mainly consists of a back cavity, a back plate, an LED light strip, and optical film sheets, etc.

[0003] The existing LED backlight module uses a blue LED chip (wavelength: 447.5nm - 453nm) to excite a quantum dot film (or phosphor) to generate white light. In the manufacturing process of the LED backlight module, the blue light emitted by the blue LED will increase the toxin in the macula area of the eye, seriously threatening our eye health. Blue light mainly has three major hazards: damage to the structure, visual fatigue, and poor sleep, etc.

[0004] The existing LED backlight module mainly consists of a back cavity, a back plate, an LED light strip, and optical film sheets, etc. Most of the existing LED light strips are adhesively attached to the back plate, and the adhesion is relatively firm, making the LED light strip not easy to disassemble. When the LED light strip has problems, it is not easy to replace, which will further lead to the damage and failure of the entire LED backlight module. Moreover, since the LED light strip is adhesively attached to the back plate, the installation spacing of the LED light strip cannot be changed, and the density of the LED light strip cannot be changed according to the needs of users, and thus different lighting effects cannot be achieved, and the applicability is relatively low. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a violet LED backlight module and a method for evaluating the hazards of small light sources, which solve the problems that the blue light emitted by the blue LED will increase the toxin in the macula area of the eye, seriously threatening eye health, and that most of the LED light strips are adhesively attached to the back plate, and the adhesion is relatively firm, making the LED light strip not easy to disassemble. When the LED light strip has problems, it is not easy to replace, which will further lead to the damage and failure of the entire LED backlight module, and that the installation spacing of the LED light strip cannot be changed, and the density of the LED light strip cannot be changed according to the needs of users, and thus different lighting effects cannot be achieved, and the applicability is relatively low.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A method for evaluating the hazards of small light sources, and the formula of the evaluation method is as follows:

[0007]

[0008] E BIt represents the energy value related to blue light hazard obtained through weighted calculation within the wavelength range of 300 - 700 nm;

[0009] E λ (λ) represents the spectral radiant flux, and the spectral radiant flux represents the radiant flux within a unit wavelength interval;

[0010] B(λ) represents the blue light hazard weighting function, which is weighted according to the different degrees of harm of light with different wavelengths to the eyes;

[0011] dλ represents the integration variable, indicating integration with respect to the wavelength λ;

[0012] The blue light peak corresponds to the maximum value on the Y-axis, and the Y-axis numbers decrease as the waveform extends along both sides of the X-axis;

[0013] When the peak wavelength is at the value of 450 nm, for the wavelength values on the right side of the X-axis where the peak wavelength is between 450 nm and 700 nm, select the range to the left of the peak wavelength, corresponding to the position where the Y value is 0.01; It should be noted that 550 nm belongs to the yellow light band, and considering the excitation characteristics of the phosphor, long-wave LEDs cannot excite short-wave phosphors. Therefore, select the range to the left of the peak wavelength, corresponding to the position where the Y value is 0.01, that is, the selected wavelength is above 550 nm.

[0014] According to the above calculation formula: as B(λ) becomes larger, E B has a larger value, representing a greater relative blue light damage. Therefore, the LED wavelength range is selected as: 360 nm - 400 nm.

[0015] A UV LED backlight module includes a frame unit, a mounting unit, and a light bar unit; the wavelength range of the light bar unit is selected according to the evaluation result of the small light source hazard assessment method, and the wavelength range of the light bar unit (3) is between 360 nm and 400 nm; the mounting unit is arranged within the frame unit, and the light bar unit is mounted on the mounting unit;

[0016] The mounting unit includes a backboard and a connection component, the connection component is arranged on the backboard, and multiple groups of connection components are provided;

[0017] The connection component includes a slider, a positioning block, a fastening block, and a fixing mechanism. The slider is slidably connected within the backboard, the positioning block is cylindrical and fixedly connected to the slider, the fastening block is rectangular and rotatably connected to the positioning block, and the fixing mechanism is arranged within the slider.

[0018] Preferably, the frame unit includes a back cavity, a reflective paper, an optical film, and an outer frame. Ventilation openings are provided on both sides of the back cavity. The reflective paper is pasted on the inner side wall of the back cavity. The optical film is disposed above the reflective paper. The outer frame is installed on the top of the back cavity.

[0019] Preferably, the back plate is installed inside the back cavity. A heat sink is provided at the bottom of the back plate, and a light bar unit is installed on the top of the back plate. A heat dissipation cavity is provided below the heat sink. The heat dissipation cavity is communicated with the ventilation openings. A heat dissipation fan is provided on one side of the heat dissipation cavity, and the heat dissipation fan is communicated with the heat dissipation cavity.

[0020] Preferably, a chute is provided on the back plate, and a slider is slidably connected in the chute.

[0021] Preferably, the fixing mechanism includes a pressing block, a connecting rod, a telescopic spring, a first extrusion block, a second extrusion block, and a bolt;

[0022] The pressing block is slidably connected in the slider. One end of the connecting rod is fixedly connected to the pressing block. The telescopic spring is sleeved outside the connecting rod. The first extrusion block is fixedly connected to the other end of the connecting rod. The second extrusion block abuts against the first extrusion block, and the second extrusion block is fixedly connected to the bottom end of the bolt.

[0023] Preferably, the bolt is rotatably connected to the fastening block and is threadedly connected to the slider.

[0024] Preferably, the light bar unit includes a light strip, lamp beads, a wiring base, and a connecting wire. The lamp beads are installed on the light strip. The wiring base is provided at one end of the light strip. The end of the connecting wire is inserted into the wiring base.

[0025] Preferably, an installation groove is provided on the light strip, a positioning block is inserted into the installation groove, and a fastening block is rotatably clamped above the installation groove.

[0026] Preferably, a UV LED chip is provided in the lamp bead, and the wavelength of the UV LED chip is 360nm - 400nm.

[0027] The present invention discloses a UV LED backlight module, and the beneficial effects thereof are as follows:

[0028] 1. The ultraviolet LED backlight module is provided with a connecting component. By rotating the fastening block, the installation and removal of the lamp strip can be realized, making the installation and removal of the lamp strip convenient. When the LED lamp strip has problems, it is easy to replace, which can extend the service life of the entire LED backlight module. Moreover, the connecting component can move on the backplane. By changing the distance between the connecting components, the spacing of the lamp strip can be changed, and then the density of the LED lamp strip can be changed, achieving different lighting effects of the ultraviolet LED backlight module according to the needs of users.

[0029] 2. By replacing the chip in the lamp bead with an ultraviolet LED chip in the ultraviolet LED backlight module, the ultraviolet LED chip is used to excite the quantum dot film to generate white light. Low blue light can reduce the stimulation of blue light to the eyes, making it easier for the eyes to focus, thus reducing visual fatigue, and reducing blue light radiation, which helps to reduce the risk of eye diseases.

[0030] 3. The ultraviolet LED backlight module is provided with a heat dissipation plate and a heat dissipation fan. During the light emission process of the LED chip, the generated heat is transmitted to the heat dissipation plate through the backplane, then diffused into the heat dissipation cavity, and finally discharged through the heat dissipation fan, enabling the heat in the ultraviolet LED backlight module to be discharged in time, avoiding the problem of damage to the LED lamp strip caused by high temperature, and further extending the service life of the ultraviolet LED backlight module. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0032] Figure 1 Schematic diagram of the change in the blue light peak of the present invention;

[0033] Figure 2 Schematic diagram of the overall structure of the present invention;

[0034] Figure 3 Schematic diagram of the frame unit structure of the present invention;

[0035] Figure 4 Schematic diagram of the installation unit structure of the present invention;

[0036] Figure 5 Schematic diagram of the connecting component structure of the present invention;

[0037] Figure 6 Cross-sectional view of the fixing mechanism of the present invention;

[0038] Figure 7Schematic diagram of the lamp strip unit structure of the present invention;

[0039] Figure 8 Schematic diagram of the connection between the lamp strip and the connecting wire of the present invention.

[0040] In the figure:

[0041] 1. Frame unit; 11. Back cavity; 111. Vent; 12. Reflective paper; 13. Optical film; 14. Outer frame;

[0042] 2. Installation unit; 21. Back plate; 211. Slide groove; 22. Connection component; 221. Slide block; 222. Positioning block; 223. Tightening block; 224. Fixing mechanism; 2241. Tightening block; 2242. Connecting rod; 2243. Telescopic spring; 2244. First extrusion block; 2245. Second extrusion block; 2246. Bolt;

[0043] 3. Lamp strip unit; 31. Lamp strip; 311. Installation groove; 32. Lamp beads; 33. Wiring seat; 34. Connecting wire; 4. Cooling fan. Specific implementation mode

[0044] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0045] By providing a method for evaluating the hazards of small light sources in the embodiments of the present application, the problem that most LED lamp strips 31 are adhesively attached to the back plate 21 with relatively firm adhesion, making it difficult to disassemble the LED lamp strip 31, and when the LED lamp strip 31 has problems, it is not easy to replace, which may lead to the damage and failure of the entire LED backlight module, and the installation spacing of the LED lamp strip 31 cannot be changed, and the density of the LED lamp strip 31 cannot be changed according to the needs of users, thus different lighting effects cannot be achieved and the applicability is relatively low is solved.

[0046] By setting the connection component 22, the installation and disassembly of the lamp strip 31 can be realized by rotating the tightening block 223, making the installation and disassembly of the lamp strip 31 convenient. When the LED lamp strip 31 has problems, it is easy to replace, which can extend the service life of the entire LED backlight module. Moreover, the connection component 22 can move on the back plate 21. By changing the distance between the connection components 22, the spacing of the lamp strip 31 can be changed, and thus the density of the LED lamp strip 31 can be changed, achieving different lighting effects of the purple LED backlight module according to the needs of users.

[0047] An embodiment of the present invention discloses a method for evaluating the hazards of small light sources. The formula of the evaluation method is as follows:

[0048]

[0049] E B represents the energy value related to blue light hazards obtained after weighted calculation within the wavelength range of 300 - 700 nm;

[0050] E λ (λ) represents the spectral radiant flux, and the spectral radiant flux represents the radiant flux within a unit wavelength interval;

[0051] B(λ) represents the blue light hazard weighting function, which is weighted according to the different degrees of harm of light with different wavelengths to the eyes;

[0052] dλ represents the integration variable, indicating integration with respect to the wavelength λ;

[0053] It should be additionally supplemented that B(λ) is a blue light hazard weighting function, which belongs to the prior art and is already recorded in the documents of the international standard (CIE (International Commission on Illumination) standard). The corresponding relationship between this function and the wavelength is as recorded in the standard document;

[0054] The blue light peak corresponds to the maximum value on the Y-axis. As it extends to both the left and right, the Y-axis numbers gradually decrease as the waveform changes. The peak wavelength is around 450 nm. To the right of the peak wavelength, the wavelength is between 450 nm and 700 nm. According to the blue light peak diagram, the wavelength corresponding to the range where the Y coordinate is below 0.01 is above 550 nm, and 550 nm belongs to the yellow light band. Considering the excitation characteristics of the phosphor, long-wave LEDs cannot excite short-wave phosphors. Therefore, the range to the left of the peak wavelength is selected, corresponding to the position where the Y value is 0.01. According to the above calculation formula: as B(λ) becomes larger, the value of E B becomes larger, representing relatively greater blue light damage. Therefore, the LED wavelength range is selected to be: 360 nm - 400 nm.

[0055] A UV LED backlight module, as shown in the appendix Figure 1-8 includes a frame unit 1, a mounting unit 2, and a light bar unit 3; the wavelength range of the light bar unit 3 is selected according to the evaluation result of the small light source hazard evaluation method, and the wavelength range of the light bar unit 3 is between 360 nm and 400 nm; the mounting unit 2 is arranged inside the frame unit 1, the light bar unit 3 is mounted on the mounting unit 2, the mounting unit 2 includes a backplane 21 and a connection component 22, the connection component 22 is arranged on the backplane 21, and the connection component 22 is arranged in multiple groups.

[0056] Specifically disclosed, the connection component 22 includes a slider 221, a positioning block 222, a fastening block 223, and a fixing mechanism 224. The slider 221 is slidably connected within the back plate 21. The positioning block 222 is cylindrical and is fixedly connected to the slider 221. The fastening block 223 is a rectangular block and is rotatably connected to the positioning block 222. The fixing mechanism 224 is disposed within the slider 221. By rotating the fastening block 223, the installation and removal of the light strip 31 can be achieved, making the installation and removal of the light strip 31 convenient, making it easy to replace the LED light strip 31 when there is a problem, thereby being able to extend the service life of the entire LED backlight module. Moreover, the connection component 22 can move on the back plate 21. By changing the distance between the connection components 22, the spacing of the light strip 31 can be changed, and thus the density of the LED light strip 31 can be changed, achieving the ability to produce different lighting effects for the purple LED backlight module according to the needs of the user.

[0057] Furthermore, the frame unit 1 includes a back cavity 11, a reflective paper 12, an optical film 13, and an outer frame 14. Ventilation openings 111 are provided on both sides of the back cavity 11. The reflective paper 12 is pasted on the inner side wall of the back cavity 11. The optical film 13 is disposed above the reflective paper 12. The outer frame 14 is installed on the top of the back cavity 11.

[0058] Specifically disclosed, the back plate 21 is installed inside the back cavity 11. A heat dissipation plate is provided at the bottom of the back plate 21, and a light bar unit 3 is installed on the top of the back plate 21. Below the heat dissipation plate is a heat dissipation cavity, which is connected to the ventilation openings 111. A heat dissipation fan 4 is provided on one side of the heat dissipation cavity, and the heat dissipation fan 4 is connected to the heat dissipation cavity. During the light emission process of the LED chip, the generated heat is transmitted to the heat dissipation plate through the back plate 21, then diffused into the heat dissipation cavity, and then discharged through the heat dissipation fan 4, enabling the heat within the purple LED backlight module to be discharged in a timely manner, avoiding the problem of damage to the LED light strip 31 caused by high temperature, and thereby extending the service life of the purple LED backlight module.

[0059] Furthermore, a chute 211 is provided on the back plate 21, and the slider 221 is slidably connected within the chute 211. Since the slider 221 moves within the chute 211, it can drive the positioning block 222, the fastening block 223, and the fixing mechanism 224 to move, thereby being able to change the position of the connection component 22, enabling the spacing of the connection component 22 to be adjusted, and thus being able to change the spacing of the light strip 31 and the density of the LED light strip 31. Different densities of the LED light strip 31 can cause the purple LED backlight module to produce different lighting effects.

[0060] Furthermore, the fixing mechanism 224 includes a pressing block 2241, a connecting rod 2242, a telescopic spring 2243, a first extrusion block 2244, a second extrusion block 2245, and a bolt 2246;

[0061] The pressing block 2241 is slidably connected within the slider 221. One end of the connecting rod 2242 is fixedly connected to the pressing block 2241. The telescopic spring 2243 is sleeved outside the connecting rod 2242. The first pressing block 2244 is fixedly connected to the other end of the connecting rod 2242. The second pressing block 2245 abuts against the first pressing block 2244, and the second pressing block 2245 is fixedly connected to the bottom end of the bolt 2246. By rotating the bolt 2246, the second pressing block 2245 can be driven to move upward, so that the second pressing block 2245 no longer abuts against the first pressing block 2244. Then, the telescopic spring 2243 presses the first pressing block 2244 to reset, driving the connecting rod 2242 to move inward, so that the pressing block 2241 no longer abuts against the inner wall of the sliding groove 211, and the slider 221 can move on the back plate 21.

[0062] Furthermore, the bolt 2246 is rotatably connected to the fastening block 223, so that during the rotational connection process of the bolt 2246, it does not affect the rotation of the fastening block 223. And the bolt 2246 is threadedly connected to the slider 221. By rotating the bolt 2246, the bolt 2246 can be driven to move downward, and then the second pressing block 2245 is driven to move downward, so that the second pressing block 2245 abuts against the first pressing block 2244. Then, the connecting rod 2242 can be driven to move outward, and then the pressing block 2241 is driven to move outward, so that the pressing block 2241 abuts against the inner wall of the sliding groove 211 to be fixed, and then the slider 221 is fixed on the back plate 21. At this time, the telescopic spring 2243 is compressed, and the compressed telescopic spring 2243 facilitates the reset of the pressing block 2241.

[0063] Furthermore, the light bar unit 3 includes a light strip 31, light beads 32, a wiring base 33, and a connecting wire 34. The light beads 32 are installed on the light strip 31. The wiring base 33 is arranged at one end of the light strip 31. The end of the connecting wire 34 is inserted into the wiring base 33. The connecting wire 34 has multiple lengths of different types and can use connecting wires 34 of different lengths according to the distance between the light strips 31. The connecting wire 34 and the wiring base 33 are connected in a plug-in manner, and the connection is relatively convenient.

[0064] Specifically disclosed, an installation groove 311 is formed on the light strip 31. A positioning block 222 is inserted into the installation groove 311. The fastening block 223 is rotatably clamped above the installation groove 311. The installation groove 311 on the light strip 31 can be sleeved on the positioning block 222. By rotating the fastening block 223 by ninety degrees, the light strip 31 can be clamped on the back plate 21, and then the light strip 31 can be installed on the back plate 21.

[0065] Furthermore, a violet LED chip is arranged in the lamp bead 32, and the wavelength of the violet LED chip is 360nm-400nm. By replacing the chip in the lamp bead 32 with a violet LED chip, the violet LED chip is used to excite the quantum dot film to produce white light. Low blue light can reduce the stimulation of blue light to the eyes, making the eyes easier to focus, thereby reducing visual fatigue, and reducing blue light radiation, which helps to reduce the risk of eye diseases.

[0066] Working principle: First, the purple LED chip with a confirmed wavelength is packaged on a single lamp bead 32, the single lamp bead 32 is installed on the lamp strip 31, and the back plate 21 is installed in the back cavity 11. Then, the number and spacing of the lamp strips 31 are determined according to the luminous effect of the purple LED backlight module required by the user, and the bolt 2246 is rotated to move the second extrusion block 2245 upward so that the second extrusion block 2245 does not abut against the first extrusion block 2244, thereby causing the telescopic spring 2243 to squeeze the first extrusion block 2244 to reset, thereby driving the connecting rod 2242 to move inward, so that the pressing block 2241 does not abut against the inner wall of the slide groove 211, so that the slide The block 221 moves on the back plate 21, moves the slider 221 to a suitable position, and rotates the bolt 2246 in the opposite direction so that the tightening block 2241 moves outward and is fixed against the inner wall of the slide groove 211, and then the mounting groove 311 on the light strip 31 is sleeved on the positioning block 222, and the fastening block 223 is rotated ninety degrees so that the light strip 31 is clamped on the back plate 21, and the wiring sockets 33 on adjacent light strips 31 are connected using connecting wires 34, so that multiple light strips 31 are connected, and then a layer of reflective paper 12 with high reflectivity is pasted on the top of the light strip 31, and then a set of optical film 13 is installed on the top of the reflective paper 12, and finally the outer frame 14 is installed on the top of the back cavity 11.

[0067] Specifically, the realization of the purple LED chip: adding a blue light film to the quantum dot film or adding blue phosphor to the phosphor layer to match the purple light excitation.

[0068] The purple LED backlight module of the present invention utilizes a purple LED chip (wavelength range: 360nm-400nm), adds a blue light film to the quantum dot film or adds blue phosphor to the phosphor layer to match the purple light excitation to reduce 415nm-455nm harmful blue light, and efficiently converts red, green and blue light to generate white light.

[0069] The low blue light of the present invention can reduce the stimulation of blue light to the eyes, making the eyes easier to focus, thereby reducing visual fatigue. In addition, the present invention reduces the radiation of low blue light, which helps to reduce the risk of eye diseases such as dry eyes, macular degeneration, etc.

[0070] The violet LED backlight module of the present invention has higher violet light energy, and the quantum dot film (or phosphor layer) can highly absorb and convert it. The spectral half-width (FWHM) of the red and green light emitted by it can be further narrowed (for example, the half-width of red / green light < 20 nm), so as to cover a wider color gamut.

[0071] In the violet LED backlight module of the present invention, the quantum dot material excited by violet light can emit red and green light with a narrower half-width (< 20 nm), reduce spectral overlap, and improve color purity.

[0072] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A small light source hazard assessment method, characterized in that: The formula for the evaluation method is as follows: E B It represents the energy value related to blue light hazards obtained after weighted calculation within the wavelength range of 300-700nm; E λ (λ) represents the spectral radiation flux, which indicates the radiation flux within a unit wavelength interval; B(λ) represents the blue light hazard weighting function, which weights the different wavelengths of light according to their different degrees of harm to the eyes; dλ represents the integral variable, which means integrating the wavelength λ; The peak of the blue light wave corresponds to the maximum value of the Y axis, and the Y axis numbers extending along both sides of the X axis decrease as the waveform changes; When the peak wavelength is at 450nm, the wavelength value to the right of the peak wavelength on the X-axis is between 450nm-700nm. Select the range to the left of the peak wavelength, the corresponding Y value is 0.01, and the corresponding wavelength is above 550nm. According to the above calculation formula: As B(λ) increases, E B The larger the value, the greater the relative blue light damage, so the LED wavelength range is selected to be: 360nm-400nm.

2. A purple LED backlight module, characterized in that: It comprises a frame unit (1), a mounting unit (2) and a light bar unit (3); the mounting unit (2) is arranged in the frame unit (1), and the light bar unit (3) is mounted on the mounting unit (2); The wavelength range of the light bar unit (3) is selected according to the evaluation result of the small light source hazard evaluation method, and the wavelength range of the light bar unit (3) is between 360nm and 400nm; The mounting unit (2) comprises a back plate (21) and a connection assembly (22), wherein the connection assembly (22) is arranged on the back plate (21), and the connection assembly (22) is arranged in a plurality of groups; The connecting assembly (22) comprises a slider (221), a positioning block (222), a fastening block (223) and a fixing mechanism (224); the slider (221) is slidably connected in the back plate (21); the positioning block (222) is cylindrical and fixedly connected to the slider (221); the fastening block (223) is a rectangular block and rotatably connected to the positioning block (222); and the fixing mechanism (224) is arranged in the slider (221).

3. The purple LED backlight module according to claim 2, characterized in that: The frame unit (1) comprises a back cavity (11), a reflective paper (12), an optical film (13) and an outer frame (14); ventilation holes (111) are provided on both sides of the back cavity (11); the reflective paper (12) is laid on the inner side wall of the back cavity (11); the optical film (13) is arranged above the reflective paper (12); and the outer frame (14) is installed on the top of the back cavity (11).

4. The purple LED backlight module according to claim 2, characterized in that: The back panel (21) is installed inside the back cavity (11); a heat sink is provided at the bottom of the back panel (21); a light bar unit (3) is installed at the top of the back panel (21); a heat sink is provided below the heat sink, and the heat sink is connected to the vent (111); a heat sink fan (4) is provided on one side of the heat sink, and the heat sink fan (4) is connected to the heat sink.

5. The purple LED backlight module according to claim 2, characterized in that: The back plate (21) is provided with a sliding groove (211), and a sliding block (221) is slidably connected in the sliding groove (211).

6. The purple LED backlight module according to claim 2, characterized in that: The fixing mechanism (224) comprises a pressing block (2241), a connecting rod (2242), a telescopic spring (2243), a first extrusion block (2244), a second extrusion block (2245) and a bolt (2246); The clamping block (2241) is slidably connected in the slider (221), one end of the connecting rod (2242) is fixedly connected to the clamping block (2241), the telescopic spring (2243) is sleeved on the outer side of the connecting rod (2242), the first extrusion block (2244) is fixedly connected to the other end of the connecting rod (2242), the second extrusion block (2245) is in contact with the first extrusion block (2244), and the second extrusion block (2245) is fixedly connected to the bottom end of the bolt (2246).

7. The purple LED backlight module according to claim 6, characterized in that: The bolt (2246) is rotatably connected to the fastening block (223), and the bolt (2246) is threadedly connected to the sliding block (221).

8. The purple LED backlight module according to claim 2, characterized in that: The light strip unit (3) comprises a light strip (31), a lamp bead (32), a wiring seat (33) and a connecting wire (34); the lamp bead (32) is mounted on the light strip (31); the wiring seat (33) is arranged at one end of the light strip (31); and the end of the connecting wire (34) is plugged into the wiring seat (33).

9. The purple LED backlight module according to claim 8, characterized in that: The light strip (31) is provided with a mounting groove (311), a positioning block (222) is inserted into the mounting groove (311), and a fastening block (223) is rotatably clamped above the mounting groove (311).

10. The purple LED backlight module according to claim 8, characterized in that: A violet LED chip is arranged inside the lamp bead (32), and the wavelength of the violet LED chip is 360nm-400nm.

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