Backlight module structure and working control method thereof

Abstract

The invention discloses a backlight module structure and a working control method thereof.The backlight module structure comprises a lamp panel, a lampshade plate and an optical film which are sequentially arranged in a stacked mode from bottom to top, a plurality of light guide covers are arranged on the lampshade plate in an array mode, a plurality of lamp beads are arranged on the lamp panel in an array mode, and the lamp beads are arranged in the light guide covers in a one-to-one correspondence mode to form light emitting areas; each surface of each light guide cover is inclined, the width of each light guide cover is gradually increased from bottom to top, the bottom of each light guide cover abuts against the lamp panel, and a partition wall is formed between each light guide cover on the lampshade plate and the adjacent light guide cover around the light guide cover; the partition walls are made of materials with the light transmittance of 10%-50%. By the adoption of the method, when individual lamp beads of the liquid crystal screen break down, the normal backlight effect of the partition where the lamp beads are located can still be guaranteed, the corresponding display area on an automobile instrument panel can still keep the sufficient display effect, a driver can normally read instrument information in real time, the automobile condition can be accurately known in time, driving safety is guaranteed, and the driving safety is improved. And moreover, the provided illumination is more uniform, and the display effect can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of liquid crystal screen backlight display, in particular to a backlight module structure and a working control method thereof. Background Art

[0002] With the continuous development of liquid crystal display technology, liquid crystal displays are now used in car dashboards, central control displays, etc. to display images and data, replacing traditional mechanical car instrument screens. Since the liquid crystal molecules on the liquid crystal panel do not have the ability to emit light, the liquid crystal display device needs to be equipped with a backlight module for providing a uniform backlight source for the liquid crystal panel. As one of the important components of the liquid crystal display device, the backlight module usually includes a light source, a backplane, a light guide component, an optical component, etc., among which the light source mostly adopts LED backlight technology, and the optical component mainly adopts various optical films such as diffusers, light-enhancing panels, etc., to diffuse and mix the stray light to form a uniformly distributed backlight. When in use, the light emitted by the LED light source built into the backlight module is diffused and mixed over a certain distance and by other optical films to form a surface light source, which can provide sufficient brightness and evenly distributed light source for the LCD panel above it; the LCD panel acts as a "switch" to allow or block the passage of light by adjusting the intensity and direction of the electric field and controlling the degree of light penetration. The image is created by the bright pixels generated by the light passing through the LCD panel, so that the LCD display can display the desired picture normally.

[0003] In order to ensure the backlight effect and improve energy efficiency, in the existing backlight module structure, a light guide for reflecting light is set around each LED lamp bead. Usually, the light guide is set as a full reflection surface similar to a mirror, so that the light of the lamp bead is reflected by the surface of the light guide and then all emitted forward, so that the light can be fully utilized. However, during the use of the backlight module, some lamp beads may be damaged. At this time, a black area will appear above the partition where the damaged lamp bead is located, thereby affecting the real-time display of the instrument information at the corresponding position on the car dashboard, posing a safety hazard to driving.

[0004] In addition, in the current mainstream automotive instrument design, all light-emitting elements (such as LEDs) need to be driven separately to light up, and each independently controlled light-emitting unit needs at least one chip channel to drive it. When the number of controlled elements is greater than the number of channels of a single chip, more chips are needed to support it. When multiple chips are introduced, not only is the cost more expensive, but the delay between the chips is inevitable. In addition, due to the different physical properties of the chips, the current between different chips will also be different, resulting in inconsistent light brightness, poor effect, and higher power. In order to overcome the above defects, time-division multiplexing technology is adopted, which enables the chip channels to light up the LED lamp beads in different areas at different time points, and at the same time increase the lighting frequency, using the visual persistence of the human eye to make the human eye unable to see the flickering feeling. From the information received by the human eye, it will be considered that the LED lamp beads in all areas are lit at the same time. With a limited number of chip channels, it can control several to dozens of times the number of LED lamp beads. While being low-cost, it also ensures uniform brightness. Summary of the invention

[0005] The object of the present invention is to provide a backlight module structure and a working control method thereof which can still ensure the normal backlight effect of the partition where the individual lamp beads of the liquid crystal screen fail, so as to ensure driving safety.

[0006] The backlight module structure described in the present invention includes a lamp board, a lampshade board and an optical film stacked in sequence from bottom to top, wherein a plurality of light guide covers are arranged in an array on the lampshade board, and a plurality of lamp beads are arranged in an array on the lamp board, and the lamp beads are arranged in a one-to-one correspondence in the light guide covers to form a light output area; the light guide covers are inclined on each side, and the width gradually increases from the bottom to the top, and the bottom thereof abuts against the lamp board; a partition wall is formed between each light guide cover on the lampshade board and the adjacent light guide covers therearound, and the partition wall has a certain light transmittance.

[0007] Preferably, the light transmittance of the partition wall is 10% to 50%. Furthermore, the light transmittance of the partition wall is 20% to 30%.

[0008] Preferably, the light transmittance of the partition wall near the edge of the lampshade plate is greater than the light transmittance of the partition wall at other positions.

[0009] Preferably, a gap is left between the top of the light guide cover and the optical film.

[0010] Preferably, a mounting groove is further provided, and the lamp panel is placed in the mounting groove.

[0011] Preferably, an outer frame is sleeved on the outer side wall of the mounting groove, and a fixing strip abutting against the upper surface of the optical film is provided on the inner upper part of the outer frame, and a fixing part is arranged on the outer frame, and its two ends are respectively fixedly connected to the bottom of the mounting groove and the outer side of the outer frame.

[0012] Preferably, a thermally conductive adhesive layer is provided between the lamp board and the mounting groove.

[0013] The working control method of the above backlight module structure comprises the following steps: The driver chip controls the lighting of the lamp beads in groups through time-sharing multiplexing, and monitors the working status of the lamp beads to determine whether the lamp beads are damaged; When it is detected that the lamp bead to be lit is damaged, the driver chip controls the lighting of the surrounding lamp beads instead of the damaged lamp bead, and staggers the lighting time of the damaged lamp bead with the lighting time of the surrounding lamp beads through time-sharing multiplexing.

[0014] Preferably, the driver chip determines whether the lamp bead is damaged by monitoring whether the current / voltage of the lamp bead is normal.

[0015] The backlight module structure and the working control method thereof are as follows: the light guide covers on the lampshade plate are placed one by one on each lamp bead of the lamp board, and partition walls are formed between adjacent light guide covers, so that each lamp bead is separated and a plurality of relatively independent light emitting areas are formed; most of the light from the lamp bead can be emitted upward after being reflected by the surface of the light guide cover, and can provide illumination for the liquid crystal panel display area corresponding to the light emitting area after being processed by the optical film; at the same time, since a certain light transmittance is set on the partition wall, a small part of the light from the lamp bead can penetrate the light guide cover and reach other light emitting areas adjacent to the surrounding area, providing certain illumination for other adjacent light emitting areas, and the light transmittance effect of the partition wall can also keep the brightness between each light emitting area continuous, which can reduce the abrupt and discontinuous shadows between different partitions, make the illumination provided by the backlight module more uniform, have better optical effect, and help to improve the display effect. When in use, the driver chip in the backlight module controls the lighting of each lamp bead in groups by time-sharing multiplexing. By using the visual persistence of the human eye, the lamp beads can be visually lit at the same time, and the driver chip monitors the working status of the lamp beads to determine whether the lamp beads are damaged. When it is detected that the lamp bead to be lit is damaged, the driver chip can control the lighting of other lamp beads adjacent to the damaged lamp bead to replace the damaged lamp bead. Part of the light in the light emitting area where these surrounding lamp beads are located can be transmitted to the light emitting area where the damaged lamp bead is located, so that it can maintain sufficient The brightness of the damaged lamp bead is increased, and light is provided for the corresponding liquid crystal display area above, which can better avoid the appearance of a black area above the light emitting area where the damaged lamp bead is located; moreover, the driving chip also staggers the lighting time of the damaged lamp bead with the lighting time of the surrounding lamp beads in a time-sharing multiplexing manner, so that the above-mentioned operation of lighting other lamp beads adjacent to the damaged lamp bead due to the damage of the lamp bead will not conflict with the original lighting operation of these surrounding lamp beads, so that each light emitting area that needs to be lit can emit light evenly, reduce the appearance of spots with different brightness, and ensure that it has a better display effect.

[0016] Therefore, through the above-mentioned backlight module structure and its working control method, when individual lamp beads are accidentally damaged during driving, the normal backlight effect of the partition where they are located can still be ensured, so that the corresponding display area on the car dashboard can still maintain sufficient display effect, the driver can read the instrument information normally in real time, and understand the vehicle condition in a timely and accurate manner, ensuring driving safety, and making the light it provides more uniform, which can improve the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. 4 is a schematic diagram of the overall structure of the backlight module in this embodiment.

[0018] Figure 2 It is a schematic diagram of the three-dimensional exploded structure of the backlight module structure in this embodiment.

[0019] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0020] Figure 4 Schematic diagram of the structure of the lamp board and the lampshade board in this embodiment.

[0021] Figure 5 It is a cross-sectional view of the backlight module structure (excluding the outer frame) of this embodiment.

[0022] Figure 6 Schematic diagram of the structure of the bottom side of the light board in this embodiment.

[0023] Figure 7 It is a schematic diagram of the exploded structure of the mounting slot, lamp panel and lampshade panel in this embodiment.

[0024] Figure 8 A schematic diagram of an example of a method for controlling the operation of a backlight module structure.

[0025] In the figure: 10-backlight module structure; 100-installation slot; 200-lamp board; 210-lamp beads; 220-driving chip; 230-thermal conductive adhesive layer; 240-adhesive layer; 300-lamp cover plate; 310-light guide cover; 400-optical film; 500-outer frame; 510-fixing strip; 520-fixing part. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] If there are descriptions involving "first" or "second" in the embodiments of the present invention, the descriptions of "first" or "second" are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the technical features of each embodiment can be arbitrarily combined. In order to make the description concise, not all possible combinations of the technical features in the embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0029] This embodiment provides a backlight module structure that can still ensure the normal backlight effect of the partition where the individual lamp beads of the liquid crystal screen fail. Figures 1 to 7 As shown, the backlight module structure 10 includes a lamp board 200, a lampshade board 300 and an optical film 400 stacked in sequence from bottom to top, a plurality of light guide covers 310 are arranged in an array on the lampshade board 300, a plurality of lamp beads 210 are arranged in an array on the lamp board 200, and the lamp beads 210 are arranged in a one-to-one correspondence in the light guide covers 310 to form a light emitting area; the light guide covers 310 are inclined on all sides, and the width gradually increases from the bottom to the top, and the bottom thereof abuts against the lamp board 200; a partition wall is formed between each light guide cover 310 on the lampshade board 300 and the adjacent light guide covers 310, and the partition wall has a certain light transmittance. Figure 6 As shown, a driving chip 220 electrically connected to each lamp bead 210 is also provided on the bottom side of the lamp board 200 .

[0030] In this embodiment, the structure of the light guide cover 310 can refer to Figure 4 As shown in , the opening of each light guide cover 310 is rectangular, and each light guide cover 310 is distributed in a matrix on the lampshade plate 300 to ensure uniform light emission and facilitate control of the light source position. Of course, the light guide cover 310 can also be set to other distribution structures. Figure 5As shown, the width of the light guide cover 310 gradually increases from the bottom to the top, which can increase the light emitting area of ​​the lamp beads 210 in each light emitting area, so that the light can be effectively reflected by the light guide cover 310 to the upper optical film 400 for processing, thereby ensuring the brightness of the upper display area. The bottom of the partition wall formed between adjacent light guide covers 310 can be set as a hollow structure, which can save the materials required for the manufacture of the lampshade plate 300, facilitate the control of the light transmittance of the partition wall by setting different thicknesses, and make it more durable, more resistant to cold and hot expansion, and better adaptable.

[0031] The lamp beads 210 may be common LED lamp beads, wherein each lamp bead 210 may be provided with a shielding cover with a light transmittance of less than 10% on its top to block the light from the top of the lamp bead 210, so that only the surrounding of the lamp bead 210 emits light, thereby further reducing the interference of the light of the lamp bead 210 on other light emitting areas, which is conducive to forming a better light emitting effect. The optical film 400 uses existing optical components such as a diffuser plate, a light-increasing plate, etc. to form a uniformly distributed backlight, which is not specifically limited in this embodiment.

[0032] The number of the driving chips 220 is as follows: Figure 6 As shown, it can be set to multiple, which uses time-division multiplexing technology to control more lamp beads 210 under a limited number of chip channels, and can adjust the brightness of each lamp bead 210 according to the input signal to change the display effect. It should be understood that the time-division multiplexing technology and the driving chip adjusting the brightness of each lamp bead according to the input signal are technologies that can be known to those skilled in the art and are achievable, and are not described in detail in this embodiment.

[0033] Refer to Figure 4 The backlight module structure 10 shown in the figure is formed by placing the light guide covers 310 on the lamp cover plate 300 one by one on each lamp bead 210 of the lamp board 200, and forming partition walls between adjacent light guide covers 310, so that each lamp bead 210 is separated and forms a plurality of relatively independent light emitting areas, such as Figure 5 As shown, most of the light from the lamp bead 210 can be emitted upward after being reflected by the surface of the light guide cover 310 (refer to Figure 5 The optical path B) can provide illumination for the liquid crystal panel display area corresponding to the light emitting area after the optical film 400 is processed; at the same time, since the partition wall is set with a certain light transmittance, a small part of the light of the lamp bead 210 can penetrate the light guide cover 310 and reach other light emitting areas adjacent to it (refer to Figure 5 The light path C) provides a certain amount of illumination for other adjacent light-emitting areas, and the light-transmitting effect of the partition wall can also keep the brightness between the light-emitting areas continuous, which can reduce the abrupt and discontinuous shadow phenomenon between different partitions, make the illumination provided by the backlight module more uniform, have better optical effect, and help to improve the display effect.

[0034] The partition wall is made of a material with a certain light transmittance, and the material is preferably PC plastic or ABS plastic. When the light transmittance of the partition wall is too high, it is easy to cause each light emitting area of ​​each lamp bead 210 to leak too much light under normal use, and the light between adjacent light emitting areas will affect each other, resulting in poor optical effect; if the light transmittance is too low, it cannot play the effect of supplementing the transmitted light for the adjacent light emitting areas. Therefore, in a specific embodiment, the light transmittance of the partition wall is 10% to 50%, and its specific light transmittance can be set according to the distribution structure of the light guide cover 310, the shape of the light guide cover 310, etc. By setting the above light transmittance, it is ensured that most of the light from the lamp bead 210 is reflected by the surface of the light guide cover 310 and then emitted upward, while a small part of the light can penetrate the light guide cover 310 and reach other light emitting areas adjacent to it, providing certain illumination for other adjacent light emitting areas, so that when individual lamp beads 210 are damaged, other lamp beads 210 around the damaged lamp bead 210 can provide it with transmitted light, and these transmitted lights can be combined to maintain sufficient illumination for the damaged light emitting area, avoiding the appearance of black areas in the display area above it, and under normal use, the brightness between the light emitting areas remains relatively continuous, which can reduce the phenomenon of abrupt discontinuous shadows between different partitions caused by the complete independence of each light emitting area, making the illumination provided by the backlight module more uniform and having better display effect. As a further preferred solution, the light transmittance of the partition wall is 20% to 30%, preferably 20%, which can be adapted to the above-mentioned matrix-arranged light guide cover 310 structure, so that it has the best use effect.

[0035] In the above structure, since the light guide 310 at the edge of the lampshade plate 300 has fewer other light guides 310 adjacent to it than the light guide 310 at the middle position, the light transmittance of the partition wall close to the edge of the lampshade plate 300 can be greater than the light transmittance of the partition wall at other positions. In a specific embodiment, the light transmittance of the partition wall at the edge position is set to 40% to 50%. Its light transmittance is set higher, so that its corresponding light emitting area can receive more light from the surrounding light emitting areas, and when it is damaged, its brightness can be guaranteed to be sufficient and will not affect the display effect; and the light guide 310 at the middle position has more other light guides 310 adjacent to it, so the light transmittance of its partition wall can be set to 20% to 30% to ensure its use effect.

[0036] like Figure 5As shown, there is a certain gap between the top of the light guide cover 310 and the optical film 400, and the specific spacing size can be determined according to the actual structure of the light guide cover 310 and the lamp bead 210, so that there is a suitable spacing between the top of the light guide cover 310 and the upper optical film 400 to avoid the formation of lamp shadows due to too small a spacing and affecting the visual effect, or the formation of halos due to too large a spacing and interfering with the illumination of other light emitting areas, thereby forming a better display effect.

[0037] like Figure 2 As shown, the backlight module structure 10 is further provided with a mounting groove 100, the lamp board 200 is placed in the mounting groove 100, and the lamp cover plate 300 and the optical film 400 are also stacked on the lamp board 200 in sequence. The side wall of the mounting groove 100 can be used to limit the stacked lamp board 200, thereby reducing the displacement between the above components.

[0038] Furthermore, an outer frame 500 is sleeved on the outer wall of the mounting groove 100, and a fixed pressure strip 510 is provided on the inner upper part of the outer frame 500 to abut against the upper surface of the optical film 400. The fixed pressure strip 510 can be Figure 2 The frame structure surrounding the inner side of the outer frame 500 makes the fixed pressure strip 510 press downward on the optical film 400, which cooperates with the mounting groove 100 to clamp the lamp board 200, the lampshade plate 300 and the optical film 400, further reducing the separation or displacement between the above components; there is also a fixing member 520 arranged on the outer frame 500, and the fixing member 520 can be as shown Figure 2 As shown, it is set in an L shape, and its two ends are fixedly connected to the bottom of the installation groove 100 and the outer side of the outer frame 500 respectively, ensuring that the outer frame 500 can be stably sleeved on the outer wall of the installation groove 100. Through the above structure, the entire backlight module structure 10 can be stably installed to avoid the shaking and abnormal sound of the backlight module due to the loosening and jumping of internal components during operation.

[0039] like Figure 7As described, a heat-conducting adhesive layer 230 is also provided between the lamp board 200 and the mounting groove 100, so that the upper side of the heat-conducting adhesive layer 230 is connected to the lower side of the lamp board 200, and the lower side of the heat-conducting adhesive layer 230 is connected to the mounting groove 100. The material can be prepared by silicone grease and glue, and has good adhesion and heat dissipation performance. The above structure is adopted to facilitate the lamp board 200 to be firmly fixed on the mounting groove 100, and when the lamp board 200 is powered on, the heat generated by it can be timely transferred to the external environment through the heat-conducting adhesive layer 230, thereby improving the reliability of the lamp board 200. In addition, a glue layer 240 for fixing can also be provided between the lamp board 200 and the lampshade plate 300, so that the lampshade plate 300 can be fixed on the top of the lamp board 200, and the light guide cover 310 on the lampshade plate 300 can correspond one by one with the lamp beads 210 on the lamp board 200, thereby avoiding dislocation and ensuring the use efficacy of the light guide cover 310.

[0040] This embodiment further provides a method for controlling the operation of the backlight module structure, which includes the following steps: The driver chip 220 controls the lighting of the lamp beads 210 in groups by time-division multiplexing, and monitors the working status of the lamp beads 210 to determine whether the lamp beads 210 are damaged; When it is detected that the lamp bead 210 to be lit is damaged, the driving chip 220 controls the lighting of the surrounding lamp beads 210 instead of the damaged lamp bead 210, and staggers the lighting time of the damaged lamp bead 210 with the lighting time of the surrounding lamp beads 210 through time-sharing multiplexing.

[0041] Among them, when monitoring the working status of the lamp bead 210, the driving chip 220 can determine whether the lamp bead 210 is damaged by monitoring whether the current / voltage of the lamp bead 210 is normal, and compare the current / voltage value detected on the chip channel of the driving chip 220 connected to the lamp bead 210 with the normal range to determine the fault.

[0042] The above method can refer to Figure 8 An example is shown, which is a 3*3 LED matrix, and each grid corresponds to a light emitting area. Under normal circumstances, the desired optical effect can be achieved by lighting up the LED lamp beads in the middle light emitting area; in the event of a fault, when the LED lamp beads in the middle light emitting area are damaged, the driver chip 220 controls the lighting of the adjacent lamp beads 210 around the damaged lamp bead 210 to replace the lighting of the damaged lamp bead 210, that is, the LED lamp beads in other light emitting areas adjacent to the middle faulty light emitting area in the figure are lit. Combined with the optical design provided by the backlight module structure described in the present invention, the light in the other adjacent light emitting areas will leak into the middle light emitting area, so that the middle light emitting area maintains a certain brightness to be close to the original optical effect.

[0043] By adopting the above method, when in use, the driver chip 220 in the backlight module controls the lighting of each lamp bead 210 in a group by time-sharing multiplexing. By utilizing the visual persistence of the human eye, the lamp beads 210 can be visually lit at the same time, and the driver chip 220 monitors the working status of the lamp bead 210 to determine whether the lamp bead 210 is damaged. When it is detected that the lamp bead 210 to be lit is damaged, the driver chip 220 can control the lighting of other lamp beads 210 adjacent to the damaged lamp bead 210 to replace the damaged lamp bead 210. Part of the light in the light emitting area where these surrounding lamp beads 210 are located can be transmitted to the light emitting area where the damaged lamp bead 210 is located. The light zone can maintain sufficient brightness and provide illumination for the corresponding liquid crystal display area above, which can better avoid the appearance of a black area above the light emitting area where the damaged lamp bead 210 is located; and the driving chip 220 also staggers the lighting time of the damaged lamp bead 210 with the lighting time of the surrounding lamp beads 210 in a time-sharing multiplexing manner, so that the above-mentioned operation of lighting up other lamp beads 210 adjacent to the damaged lamp bead 210 due to the damage of the lamp bead 210 will not conflict with the original lighting operation of these surrounding lamp beads 210, so that each light emitting area that needs to be lit can emit light evenly, reduce the appearance of spots with different brightness, and ensure that it has a better display effect.

[0044] In addition, when several adjacent lamp beads 210 are damaged, the above method can also be used to light up other lamp beads 210 around these lamp beads 210 to provide certain lighting for the damaged area. It has a wide range of applications and can ensure that sufficient emergency display functions can be provided, so that the driver can still make effective readings when some lamp beads 210 on the dashboard display screen fail during driving. After driving, the faulty lamp beads 210 can be repaired or replaced.

[0045] In summary, through the above-mentioned backlight module structure and its working control method, the present invention can ensure the normal backlight effect of the partition where the individual lamp beads 210 are located when they are accidentally damaged during driving, so that the corresponding display area on the car dashboard can still maintain a sufficient display effect. The driver can read the instrument information normally in real time and understand the vehicle condition in a timely and accurate manner to ensure driving safety. The light provided by the light is more uniform, which can improve the display effect.

[0046] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A backlight module structure, comprising a lamp board (200), a lampshade board (300) and an optical film (400) stacked in sequence from bottom to top, characterized in that: A plurality of light guide covers (310) are arranged in an array on the lampshade plate (300), a plurality of lamp beads (210) are arranged in an array on the lamp board (200), and the lamp beads (210) are arranged in a one-to-one correspondence in the light guide covers (310) to form a light output area; each surface of the light guide covers (310) is inclined, and the width gradually increases from the bottom to the top, and the bottom thereof abuts against the lamp board (200); a partition wall is formed between each light guide cover (310) on the lampshade plate (300) and the adjacent light guide covers (310) therearound, and the partition wall has a certain light transmittance.

2. The backlight module structure according to claim 1, characterized in that: The light transmittance of the partition wall is 10% to 50%.

3. The backlight module structure according to claim 2, characterized in that: The light transmittance of the partition wall is 20% to 30%.

4. The backlight module structure according to any one of claims 1 to 3, characterized in that: The light transmittance of the partition wall near the edge of the lampshade plate (300) is greater than the light transmittance of the partition wall at other positions.

5. The backlight module structure according to any one of claims 1 to 3, characterized in that: A gap is left between the top of the light guide cover (310) and the optical film (400).

6. The backlight module structure according to any one of claims 1 to 3, characterized in that: A mounting groove (100) is also provided, and the light panel (200) is placed in the mounting groove (100).

7. The backlight module structure according to claim 6, characterized in that: An outer frame (500) is sleeved on the outer side wall of the installation groove (100), and a fixing strip (510) is provided on the inner upper part of the outer frame (500) to abut against the upper surface of the optical film (400), and a fixing member (520) is provided on the outer frame, and its two ends are respectively fixedly connected to the bottom of the installation groove (100) and the outer side of the outer frame (500).

8. The backlight module structure according to claim 6, characterized in that: A heat-conducting adhesive layer (230) is also provided between the lamp board (200) and the mounting groove (100).

9. A method for controlling a backlight module structure, characterized in that: The steps include: The driver chip controls the lighting of the lamp beads in groups through time-sharing multiplexing, and monitors the working status of the lamp beads to determine whether the lamp beads are damaged; When it is detected that the lamp bead to be lit is damaged, the driver chip controls the lighting of the surrounding lamp beads instead of the damaged lamp bead, and staggers the lighting time of the damaged lamp bead with the lighting time of the surrounding lamp beads through time-sharing multiplexing.

10. The working control method of the backlight module structure according to claim 9, characterized in that: The driver chip determines whether the lamp bead is damaged by monitoring whether the current / voltage of the lamp bead is normal.

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