CN217443703U

CN217443703U - Backlight lamp strip, backlight module, display module and display device

Info

Publication number: CN217443703U
Application number: CN202221426136.5U
Authority: CN
Inventors: 文海波
Original assignee: Shenzhen Konka Electronic Technology Co Ltd
Current assignee: Shenzhen Konka Electronic Technology Co Ltd
Priority date: 2022-06-08
Filing date: 2022-06-08
Publication date: 2022-09-16
Anticipated expiration: 2032-06-08

Abstract

The utility model discloses a backlight lamp strip, backlight module, display module and display device, backlight lamp strip includes flexbile plate and LED lamp pearl, and a plurality of LED lamp pearls set up on the flexbile plate along the length direction of flexbile plate with mutual interval, and LED lamp pearl and flexbile plate can be dismantled and be connected, change the interval between the LED lamp pearl or the relative position between the LED lamp pearl through folding or crooked flexbile plate; the lateral part of flexonics board is fixed with the fixed plate of a plurality of perpendicular to flexonics board length direction, and the position and the quantity and the LED lamp pearl one-to-one of fixed plate have seted up the fixed orifices on the fixed plate. The utility model discloses a flexible sheet replaces original aluminium base board, can change interval and position between the LED lamp pearl through folding or crooked flexible sheet, increases the compatibility of lamp strip, improves the homogeneity that shows luminance.

Description

Backlight lamp strip, backlight module, display module and display device

Technical Field

The utility model relates to a display technical field, concretely relates to backlight lamp strip, backlight unit, display module and display device.

Background

A general LED backlight bar is designed by adopting a linear aluminum substrate and LED lamp beads with fixed distance, so that the design is simple and the production is easy. The LED lamp beads are relatively concentrated in the central area so as to ensure that the central part can meet the requirement of maximum brightness, and the common brightness uniformity standard can be met. However, part of users require common brightness uniformity and also provide requirements for brightness uniformity of four corners, the design can not meet the requirements any more, the compatibility is poor, and when the distance between the LED lamp beads needs to be adjusted partially, because the distance between the LED lamp beads on the aluminum substrate lamp strip is fixed, a new lamp strip needs to be redesigned, and unnecessary waste is caused.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the utility model provides a backlight lamp strip, backlight unit, display module and display device adopts the flexible sheet to replace original aluminium base board, can change interval and position between the LED lamp pearl through folding or crooked flexible sheet, increases the compatibility of lamp strip, improves the homogeneity that shows luminance.

Therefore, the embodiment of the utility model provides a following technical scheme:

the utility model provides a backlight lamp strip in a first aspect, including flexible board and LED lamp pearl, a plurality of LED lamp pearls set up on the flexible board along the length direction of flexible board with mutual interval, LED lamp pearl with the flexible board can be dismantled and be connected, through folding or crooked the flexible board changes the interval between the LED lamp pearl or the relative position between the LED lamp pearl;

the side of the flexible board is fixed with a plurality of fixed plates perpendicular to the length direction of the flexible board, the positions and the number of the fixed plates correspond to the LED lamp beads one by one, and the fixed plates are provided with fixing holes.

Further, the both sides of flexographic plate all are fixed with the fixed plate, the both sides of every LED lamp pearl are equallyd divide cloth and are had the fixed plate.

Further, a plurality of the fixed plates are distributed on two sides of the flexible plate in a staggered mode at intervals.

Further, a heat dissipation fan is fixed on the fixing plate, and an air outlet of the heat dissipation fan is opposite to the LED lamp beads.

Furthermore, the heat dissipation fan is located between the LED lamp beads and the fixing holes, the fixing plate and the flexible plate are provided with air guide heat dissipation grooves, and two ends of each air guide heat dissipation groove are respectively opposite to the air outlet of the heat dissipation fan and the LED lamp beads.

Furthermore, an electrostatic shielding structure is arranged on the flexible board, the electrostatic shielding structure is positioned on the surface of the flexible board opposite to the LED lamp beads, and the number and the positions of the electrostatic shielding structures correspond to the LED lamp beads one by one.

Further, the LED lamp beads are bonded with the flexible plate.

The utility model discloses the second aspect provides a backlight module, including the arbitrary item of first aspect backlight bar.

The utility model discloses the third aspect provides a display module assembly, including liquid crystal display panel and second aspect backlight unit, backlight unit does liquid crystal display panel provides backlight.

The utility model discloses the fourth aspect provides a display device, including the third aspect display module assembly.

The embodiment of the utility model provides a technical scheme has following advantage:

the utility model provides a backlight lamp strip, backlight unit, display module and display device adopts the flexbile plate to replace original aluminium base board, can change interval and position between the LED lamp pearl through folding or crooked flexbile plate, increases the compatibility of lamp strip, improves the homogeneity that shows luminance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a display module using a conventional backlight bar.

Fig. 2 is a schematic diagram of a five-point brightness uniformity testing method.

Fig. 3 is a schematic structural view of a backlight lamp strip according to an embodiment of the present invention.

Fig. 4 is the utility model discloses backlight strip changes the side view of LED lamp pearl interval.

Fig. 5 is the utility model discloses backlight lamp strip changes the schematic diagram of LED lamp pearl position.

Fig. 6 is a schematic structural view of a backlight bar according to another embodiment of the present invention.

Fig. 7 is a schematic structural view of a backlight bar according to a third embodiment of the present invention.

Fig. 8 is a longitudinal sectional view of the backlight lamp strip according to the embodiment of the present invention.

Fig. 9 is a schematic structural diagram of a display module according to an embodiment of the present invention.

In the figure, the position of the upper end of the main shaft,

1. an aluminum substrate; 2. LED lamp beads; 3. a liquid crystal display panel; 4. a flexible board; 42. a conductive layer; 43. an insulating layer; 5. a fixing plate; 6. a fixing hole; 7. a heat-dissipating fan; 8. wind-guiding radiating groove.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center of gravity," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Fig. 1 is a schematic structural view of a display module using a conventional backlight bar. As shown in fig. 1, two backlight lamp strips are fixed below a liquid crystal display panel 3 in parallel, each backlight lamp strip comprises an aluminum substrate 1 and LED lamp beads 2 on the aluminum substrate 1, the positions and the intervals of the LED lamp beads 2 are fixed, and the LED lamp beads 2 of the lamp strips are relatively concentrated in a central area, so that the maximum brightness of the central part is ensured, but the brightness is not uniform.

Some users have high requirements on the uniformity of the module, and not only the common 9-point brightness uniformity is tested, but also the five-point brightness uniformity is tested, and the testing method is shown in fig. 2:

the five-point luminance uniformity was: Pi-Li/L0 × 100%;

pi indicates the uniformity of the five-point luminance of the backlight module, Li indicates the lowest value of the detected luminances at four points P1, P2, P3 and P4 in the diagram (for example, Li is 70 in the case of actual luminance detection P1-70, P2-80, P3-100 and P4-110), and L0 indicates the luminance value detected by P0.

Although this index value is generally required to be 50%, the normal equidistant linear light bar design (i.e. the light bar in fig. 1) cannot meet the requirement. Generally, the central part of the picture is brightest and is also the place for testing the maximum brightness, and the closer to the corners, the darker, the four corners are darkest. The five-point brightness uniformity of the display module of fig. 1 is obviously not satisfactory. From the calculation of the five-point luminance uniformity Pi-Li/L0-100%; it can be seen that the percentage of the five-point luminance uniformity is increased by increasing the luminance value of Li. Therefore, the utility model provides a flexible or folding backlight lamp strip that improves luminance homogeneity and compatibility.

Fig. 3 is a schematic structural view of a backlight lamp strip according to an embodiment of the present invention. As shown in fig. 3, the backlight lamp strip includes a flexible board 4 and LED lamp beads 2, and the flexible board is made of a foldable and bendable flexible material, such as polyimide or polyester film. The LED lamp beads 2 are arranged on the flexible board 4 at intervals along the length direction of the flexible board 4, the intervals between the LED lamp beads 2 can be the same or different, and the intervals between the LED lamp beads 2 can be adjusted by folding or bending the flexible board 4, so that the arrangement intervals of the LED lamp beads 2 on the flexible board 4 are not specially limited. LED lamp pearl 2 can be dismantled with flexbile plate 4 and be connected, and is preferred, LED lamp pearl 2 bonds with flexbile plate 4, and accessible glue is with LED lamp pearl 2 and 4 direct bonds of flexbile plate, perhaps fixes LED lamp pearl 2 on the lamp stand, and the lamp stand bonds with flexbile plate 4.

The distance between the LED lamp beads 2 or the relative position between the LED lamp beads 2 can be changed by folding or bending the flexible plate 4. As shown in fig. 4, if the distances between the LED lamp beads 2 are both a, the distances between the LED lamp beads 2 are adjusted to be smaller than a by folding the flexible board sections between the two LED lamp beads 2, and all the requirements that the distances are smaller than a can be commonly used for the backlight lamp strip, so that the distances between the LED lamp beads 2 can be reduced by folding. The compatibility and the universality of the backlight LED lamp bead 2 are improved, and the standardized formulation of the design is realized. As shown in fig. 5, the flexible board section between two LED lamp beads 2 is bent and folded, so that the positions of the LED lamp beads 2 can be changed, and the LED lamp beads are not on the same straight line in the initial state, and the brightness uniformity can be improved by changing the positions of the LED lamp beads 2.

As shown in fig. 3, 6 and 7, a plurality of fixing plates 5 perpendicular to the length direction of the flexible plate 4 are fixed on the side portion of the flexible plate 4, the positions and the number of the fixing plates 5 correspond to the LED lamp beads 2 one by one, and fixing holes 6 are formed in the fixing plates 5. The fixing plate 5 may be integrally formed with the flexible plate 4, or may be made of other materials and then fixedly connected to the flexible plate 4. The backlight lamp bar can be fixed on the back plate of the backlight module through bolts passing through the fixing holes 6. The fixing plate 5 is arranged on the side of the flexible plate 4 and at a position corresponding to the LED lamp beads 2, so that the position of the fixing plate 5 changes along with the change of the positions of the corresponding LED lamp beads 2, and the flexible plate 4 is folded and bent to form a part between the lamp beads and cannot be influenced by the fixing plate 5.

As shown in fig. 3, the fixing plates 5 may be disposed on only one side of the flexible plate 4, and the number of the fixing plates 5 is the same as that of the LED beads 2.

As shown in fig. 6, fixing plates 5 are fixed on two sides of the flexible plate 4, and fixing plates 5 are distributed on two sides of each LED lamp bead 2. The quantity of fixed plate 5 is 2 times of 2 quantity of LED lamp pearls, all sets up fixed plate 5 in the both sides of flexible sheet 4, guarantees the fixed stability of lamp strip in a poor light.

As shown in fig. 7, the fixing plates 5 are alternately arranged on both sides of the flexible plate 4. The quantity of fixed plate 5 is the same with the quantity of LED lamp pearl 2, but 5 crisscross distributions of fixed plate, like this, also all play the fixed action in the both sides of flexible board 4, have guaranteed fixed stability, but have reduced the degree of difficulty of operation, improve production efficiency.

As shown in fig. 3, 6 and 7, a heat dissipation fan 7 is fixed on the fixing plate 5, and an air outlet of the heat dissipation fan 7 faces the LED lamp bead 2. Radiator fan 7 adopts miniature radiator fan, and the power adopts external power supply, and radiator fan 7 is just to LED lamp pearl 2, improves the radiating effect.

Preferably, the heat dissipation fan 7 is located between the LED lamp beads 2 and the fixing hole 6, the air guide heat dissipation groove 8 is formed in the fixing plate 5 and the flexible plate 4, two ends of the air guide heat dissipation groove 8 are respectively opposite to an air outlet of the heat dissipation fan 7 and the LED lamp beads 2, the air guide heat dissipation groove 8 plays a role in air induction, and the heat dissipation effect is further enhanced. The wind-guiding heat-dissipating groove 8 can also be enclosed by two vertical plates fixed on the fixed plate and the flexible plate.

The flexible circuit board is formed by arranging a circuit on the flexible board, the circuit can be a lead and can be printed on the flexible board in a silk-screen mode or in other modes, and the embodiment is not particularly limited.

Be equipped with electrostatic shield structure on the flexible board 4, electrostatic shield structure is located the flexible board 4 and on the surface opposite with LED lamp pearl 2, and electrostatic shield structure's quantity and position and LED lamp pearl 2 one-to-one. As shown in fig. 8, a conductive layer 42 and an insulating layer 43 are sequentially arranged on the surface of the flexible board 4 opposite to the LED lamp bead 2, the conductive layer 42 may be a copper sheet, the conductive layer 42 is grounded, a circular hole is arranged on the insulating layer 43, and the part of the conductive layer 42 leaking from the circular hole forms an electrostatic shielding structure. The electrostatic shielding structures correspond to the LED lamp beads 2 one by one, the orthographic projection of any electrostatic shielding structure on the plane where the flexible plate 4 is located and the orthographic projection of the LED lamp bead 2 corresponding to any electrostatic shielding structure on the plane where the flexible plate 4 is located have an overlapping area, and each electrostatic shielding structure is used for protecting the corresponding LED lamp bead 2. When backlight unit carries out ESD (Electrostatic Discharge) test, the Electrostatic shield structure protects LED lamp pearl 2, avoids LED lamp pearl 2 to be damaged by static.

The embodiment of the utility model provides a second aspect provides a backlight module, including the first aspect embodiment backlight bar.

The embodiment of the third aspect provides a display module assembly, including the backlight unit of liquid crystal display panel 3 and second aspect, backlight unit provides backlight for liquid crystal display panel 3. As shown in fig. 9, two backlight lamp strips are arranged, and the flexible board 4 is bent in a folding manner, so that the head and the tail of the LED lamp beads 2 on the flexible board 4 move to the four corners of the liquid crystal display panel 3, the brightness of Li is increased (the brightness of the positions where the lamp beads are located is highest), and the uniformity of the five-point brightness of the module is improved. Through testing, the five-point brightness uniformity is improved by 20% compared with that of the graph 1.

The utility model discloses the fourth aspect provides a display device, including the third aspect display module assembly. The display device can be a liquid crystal television or a computer.

The utility model utilizes the characteristic that the flexible board 4 is soft and easy to deform to set the lamp strip, thereby realizing the transformation from 'dead' to 'live'; the ordinary lamp strip is compared with 'engraving printing', and the technical scheme of the utility model can be regarded as 'type printing' of the weakening version.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. The backlight lamp bar is characterized by comprising a flexible board (4) and a plurality of LED lamp beads (2), wherein the LED lamp beads (2) are arranged on the flexible board (4) at intervals along the length direction of the flexible board (4), the LED lamp beads (2) are detachably connected with the flexible board (4), and the distance between the LED lamp beads (2) or the relative position between the LED lamp beads (2) is changed by folding or bending the flexible board (4);

the lateral part of flexbile plate (4) is fixed with a plurality of perpendicular to flexbile plate (4) length direction's fixed plate (5), the position and the quantity of fixed plate (5) with LED lamp pearl (2) one-to-one, fixed orifices (6) have been seted up on fixed plate (5).

2. The backlight lamp strip of claim 1, wherein the fixing plates (5) are fixed on two sides of the flexible plate (4), and the fixing plates (5) are distributed on two sides of each LED lamp bead (2).

3. The backlight lamp strip according to claim 1, wherein a plurality of the fixing plates (5) are alternately distributed on two sides of the flexible plate (4).

4. The backlight lamp strip of claim 1, wherein a heat dissipation fan (7) is fixed on the fixing plate (5), and an air outlet of the heat dissipation fan (7) faces the LED lamp beads (2).

5. The backlight lamp strip of claim 4, wherein the heat dissipation fan (7) is located between the LED lamp beads (2) and the fixing hole (6), the fixing plate (5) and the flexible plate (4) are provided with air guide heat dissipation grooves (8), and two ends of the air guide heat dissipation grooves (8) are respectively opposite to the air outlet of the heat dissipation fan (7) and the LED lamp beads (2).

6. The backlight lamp strip according to claim 1, wherein the flexible board (4) is provided with electrostatic shielding structures, the electrostatic shielding structures are located on a surface of the flexible board (4) opposite to the LED lamp beads (2), and the number and the positions of the electrostatic shielding structures correspond to the LED lamp beads (2) one by one.

7. The backlight lamp strip of claim 1, wherein the LED lamp beads (2) are bonded to the flexible sheet (4).

8. A backlight module comprising the backlight lamp strip of any one of claims 1 to 7.

9. A display module comprising a liquid crystal display panel (3) and the backlight module of claim 8, the backlight module providing backlight to the liquid crystal display panel (3).

10. A display device comprising the display module of claim 9.