Backlight structure and display module

Abstract

The utility model discloses a backlight structure which comprises a backlight fixing frame, a backlight optical assembly and a backlight FPC, and a limiting cavity is formed in the backlight fixing frame. The backlight optical assembly is placed in the limiting cavity; the backlight FPC comprises an FPC body, a limiting block and a double-sided adhesive tape, the limiting block is arranged in the area, corresponding to the IC binding position in the display screen, of the FPC body, the limiting block extends in the direction away from the backlight fixing frame and forms a protrusion, and one side face of the double-sided adhesive tape is attached to the side face, facing the backlight fixing frame, of the FPC body; and the double-sided adhesive covers one side surface, facing the backlight fixing frame, of the limiting block. The limiting block is used for replacing a backlight rubber frame boss, so that the effect of preventing a glass area extending out of the lower piece of glass from being pressed and deformed is achieved; meanwhile, the limiting block is arranged on the FPC body, so that the double-sided adhesive tape can cover the limiting block, the width of the double-sided adhesive tape cannot be reduced, and the double-sided adhesive tape can still keep the bonding stability.

Description

Technical Field

[0001] The utility model relates to the field of display technology, in particular to a backlight structure and a display module. Background Art

[0002] The display module generally includes a cover plate, a display screen and a backlight structure. Generally, a liquid crystal display screen includes an upper glass and a lower glass. After the upper glass and the lower glass are bonded together, a portion of the lower glass will extend relative to the upper glass for IC binding, which means that part of the lower glass will appear suspended. However, this structure is prone to deformation due to stress, causing the glass to break and even display abnormalities. Therefore, the usual solution is to add bosses on both sides of the lower end of the backlight frame in the backlight structure, and use the bosses to protect the part of the glass extending from the lower glass to prevent the lower glass from being compressed and deformed.

[0003] In the backlight structure, double-sided adhesive is usually added to the back of the backlight FPC, and it is fixed to the backlight frame through the double-sided adhesive. Due to the position of the backlight frame boss, the backlight FPC needs to be set with an avoidance position. After the avoidance position is set, the width of the double-sided adhesive at the corresponding position will become smaller. In this way, after the display module undergoes reliability tests such as roller and drop, the double-sided adhesive in this area is easy to debond and peel off, which will cause the backlight FPC to be unstable, causing the LED lights on the FPC to shift, and then causing abnormal display effects of the display module. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a backlight structure and a display module, which can not only ensure the bonding stability of the backlight FPC, but also avoid the problem of the glass extending from the lower glass being compressed and broken.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A backlight structure comprises: a backlight fixing frame, a backlight optical component and a backlight FPC, wherein a limit cavity is provided on the backlight fixing frame; the backlight optical component is placed in the limit cavity; the backlight FPC comprises an FPC body, a limit block and a double-sided adhesive, wherein the limit block is provided in an area of ​​the FPC body corresponding to an IC binding position in a display screen, the limit block extends in a direction away from the backlight fixing frame and forms a protrusion, one side of the double-sided adhesive is attached to a side surface of the FPC body facing the backlight fixing frame, and the double-sided adhesive covers a side surface of the limit block facing the backlight fixing frame, and the other side surface of the double-sided adhesive is partially attached to the backlight fixing frame.

[0007] In one embodiment, the limit block is a PI limit block.

[0008] In one embodiment, the limit block is a PET limit block.

[0009] In one embodiment, the backlight fixing frame includes a rubber frame and an iron frame, the rubber frame and the iron frame are engaged and connected, one side of the double-sided adhesive is attached to a side surface of the FPC body facing the backlight fixing frame, and the other side of the double-sided adhesive is partially attached to the rubber frame.

[0010] In one embodiment, the backlight optical assembly includes a reflective film, a light guide plate, a diffusion film, a lower brightness enhancement film and an upper brightness enhancement film stacked in sequence, and the reflective film is located near the bottom surface of the limiting cavity.

[0011] In one of the embodiments, it further includes a light shielding glue, which is located on a side of the upper brightness enhancement film away from the lower brightness enhancement film, and the light shielding glue is partially attached to a side of the FPC body away from the double-sided adhesive.

[0012] In one embodiment, a plurality of LED lamps are bound to the FPC body, and a plurality of avoidance holes are opened on the double-sided adhesive. When one side of the double-sided adhesive is attached to the FPC body, each avoidance hole corresponds to avoid each LED lamp.

[0013] A display module comprises the above-mentioned backlight structure, a display screen and a cover plate, wherein the cover plate, the display screen and the backlight structure are stacked in sequence.

[0014] In one embodiment, the cover plate is a glass cover plate.

[0015] In one embodiment, the display screen includes an upper polarizer, an upper glass, a lower glass and a lower polarizer stacked in sequence, an optical adhesive layer is provided on a side of the upper polarizer away from the upper glass, and the display screen is connected to the cover plate via the optical adhesive layer.

[0016] Compared with the prior art, the utility model has at least the following advantages:

[0017] The backlight structure and display module of the present invention are provided with a backlight fixing frame, a backlight optical component and a backlight FPC, and a limit block is directly provided in the area of ​​the FPC body corresponding to the IC binding position in the display screen. The limit block replaces the backlight glue frame boss to achieve the effect of preventing the glass area extending from the lower glass from being compressed and deformed. At the same time, the limit block is provided on the FPC body, and the backlight glue frame boss is cancelled, so there is no need to provide an avoidance position on the FPC body, and the double-sided adhesive tape can cover the limit block. In this way, the width of the double-sided adhesive tape will not be reduced. Furthermore, after the display module is subjected to reliable experiments such as roller or drop, the double-sided adhesive tape can still maintain the bonding stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments are briefly introduced below.

[0019] Figure 1 It is a front view structural schematic diagram of an existing backlight structure with a backlight rubber frame boss;

[0020] Figure 2 for Figure 1 A schematic diagram of a stacked structure of an existing backlight structure with a backlight rubber frame boss;

[0021] Figure 3 for Figure 1 A schematic diagram of the structure of a backlight FPC having a backlight structure with a backlight rubber frame boss in the prior art;

[0022] Figure 4 for Figure 1 A schematic diagram of the assembly structure of a backlight FPC and a backlight glue frame in a backlight structure with a backlight glue frame boss;

[0023] Figure 5 It is a schematic diagram of the stacking structure of the display module in one embodiment of the utility model;

[0024] Figure 6 for Figure 5 A schematic diagram of a stacking structure of a backlight structure in a display module;

[0025] Figure 7 for Figure 5 A front view structural diagram of a backlight structure in a display module;

[0026] Figure 8 for Figure 5 A front view structural diagram of a backlight FPC and a backlight fixing frame of a backlight structure in a display module;

[0027] Fig. 9 for Figure 5 A schematic diagram of the structure of the FPC body and the limit block of the backlight structure in the display module;

[0028] Fig.10 for Figure 5 Schematic diagram of the FPC body, limit block and double-sided adhesive structure of the backlight structure in the display module. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.

[0030] See also Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, a display module 10 includes a cover plate 11, a display screen 12 and a backlight structure 13, and the cover plate 11, the display screen 12 and the backlight structure 13 are stacked in sequence. The cover plate 11 is used to isolate and protect the display screen 12, and the backlight structure 13 is used to provide a light source for the display screen 12, so as to realize the display function of the display module. Preferably, the cover plate 11 is a glass cover plate. Specifically, the display screen 12 includes an upper polarizer 12a, an upper glass 12b, a lower glass 12c and a lower polarizer 12d stacked in sequence, and an optical adhesive layer 12e is provided on a side of the upper polarizer 12a away from the upper glass 12b, and the display screen 12 is connected to the cover plate 11 through the optical adhesive layer 12e.

[0031] Further, Figure 1 , Figure 2 , Figure 3 and Figure 4 For the existing backlight structure with backlight glue frame boss, since the upper glass in the display screen will extend partly relative to the lower glass for IC binding, part of the lower glass will be suspended, which is easy to cause glass breakage due to force deformation and even display abnormality. Therefore, the usual solution is to add a glue frame boss A at the lower end of the glue frame in the backlight structure. After the backlight glue frame boss A is set, the corresponding avoidance position B1 needs to be set on the corresponding backlight FPC B, so that the corresponding attachment width of the double-sided adhesive C on the backlight FPC will become smaller; in this way, after the display module is subjected to reliability tests such as roller and drop, Figure 4 The double-sided adhesive in the D area is easy to debond and peel off, which will cause the backlight FPC to be unstable, and then cause the LED lights on the FPC to shift, making the display effect of the display module abnormal.

[0032] Therefore, in the utility model, a backlight structure 13 includes: a backlight fixing frame 100, a backlight optical component 200 and a backlight FPC (flexible circuit board) 300, and a limit cavity is provided on the backlight fixing frame 100; the backlight optical component 200 is placed in the limit cavity; the backlight FPC 300 includes an FPC body 310, a limit block 320 and a double-sided adhesive 330, and the FPC body 310 is provided with a limit block 320 in an area corresponding to the IC binding position 12f in the display screen 12, the limit block 320 extends in a direction away from the backlight fixing frame 100 and forms a protrusion, one side of the double-sided adhesive 330 is attached to a side surface of the FPC body 310 facing the backlight fixing frame 100, and the double-sided adhesive 330 covers a side surface of the limit block 320 facing the backlight fixing frame 100, and the other side of the double-sided adhesive 330 is partially attached to the backlight fixing frame 100.

[0033] It should be noted that, in the present invention, by canceling the glue frame boss A on the backlight glue frame and directly setting a limit block 320 in the area of ​​the FPC body 310 corresponding to the IC binding position 12f in the display screen 12, the limit block 320 replaces the backlight glue frame boss A to prevent the glass area extending from the lower glass from being compressed and deformed; at the same time, the limit block is set on the FPC body, and the backlight glue frame boss is cancelled, so there is no need to set an avoidance position on the FPC body 310, so the double-sided adhesive 330 can cover the limit block 320, so that the width of the double-sided adhesive 330 will not be reduced, and further, after the display module is subjected to reliable experiments such as roller or drop, the double-sided adhesive 330 can still maintain the bonding stability.

[0034] Preferably, the stopper 320 is a PI (polyimide) stopper. The PI stopper is made of plastic and has an insulating effect, so it will not affect the normal operation of the FPC body, and the PI stopper has a certain thickness, and the thickness can be designed to match the actual needs. For example, the PI stopper can be fixed to the FPC body by adhesive.

[0035] Preferably, the stopper 320 is a PET (polyester) stopper. The PET stopper is made of plastic and has an insulating effect, so it will not affect the normal operation of the FPC body, and the PET stopper has a certain thickness, and the thickness can be designed to match the actual needs. For example, the PET stopper can be fixed to the FPC body by adhesive.

[0036] In one embodiment, the backlight fixing frame 100 includes a plastic frame 110 and an iron frame 120, the plastic frame 110 and the iron frame 120 are connected in an interlocking manner, one side of the double-sided adhesive 330 is attached to a side surface of the FPC body 310 facing the backlight fixing frame 100, and the other side of the double-sided adhesive 330 is partially attached to the plastic frame 110. By arranging a stop block on the FPC body 310, the double-sided adhesive 330 can cover the stop block, which can not only increase the attachment area between the double-sided adhesive 330 and the plastic frame 110 and improve the bonding stability of the FPC body 310, but also prevent the part of the glass area extending from the lower glass from being crushed by the stop block; specifically, the stop block is used to make one side of the stop block abut against one side of the cover plate, so that a stop space is formed between the stop block and the cover plate, and even if the display module is squeezed, the stop block can be used to limit and reinforce the part of the glass extending from the lower glass, so that the lower glass can be prevented from being crushed by the stop block.

[0037] In one embodiment, the backlight optical assembly 200 includes a reflective film 210 , a light guide plate 220 , a diffusion film 230 , a lower brightness enhancement film 240 , and an upper brightness enhancement film 250 which are stacked in sequence, and the reflective film 210 is located near the bottom surface of the limiting cavity.

[0038] Furthermore, the backlight structure further includes a light shielding glue 400, which is located on the side of the upper brightness enhancement film 250 away from the lower brightness enhancement film 240, and the light shielding glue 400 is partially attached to the side surface of the FPC body away from the double-sided adhesive 330. The remaining area of ​​the light shielding glue 400 is attached to the backlight fixing frame, and the light shielding glue plays a role of shielding to avoid the problem of lateral light leakage.

[0039] In one embodiment, a plurality of LED lamps 311 are bound to the FPC body 310, and a plurality of avoidance holes are provided on the double-sided adhesive tape 330. When one side of the double-sided adhesive tape 330 is attached to the FPC body 310, each avoidance hole avoids each LED lamp 311. In this way, the double-sided adhesive tape 330 will not affect the normal operation of the LED lamp 311.

[0040] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A backlight structure, characterized in that: include: A backlight fixing frame, wherein a limited position cavity is provided on the backlight fixing frame; A backlight optical assembly, wherein the backlight optical assembly is placed in the limiting cavity; and A backlight FPC, the backlight FPC comprises an FPC body, a limit block and a double-sided adhesive, the FPC body is provided with a limit block in an area corresponding to the IC binding position in the display screen, the limit block extends in a direction away from the backlight fixing frame and forms a protrusion, one side of the double-sided adhesive is attached to a side surface of the FPC body facing the backlight fixing frame, and the double-sided adhesive covers a side surface of the limit block facing the backlight fixing frame, and the other side surface of the double-sided adhesive is partially attached to the backlight fixing frame.

2. The backlight structure according to claim 1, characterized in that: The limit block is a PI limit block.

3. The backlight structure according to claim 1, characterized in that: The limit block is a PET limit block.

4. The backlight structure according to claim 1, characterized in that: The backlight fixing frame includes a plastic frame and an iron frame, the plastic frame is engaged with the iron frame, one side of the double-sided adhesive is attached to a side surface of the FPC body facing the backlight fixing frame, and the other side of the double-sided adhesive is partially attached to the plastic frame.

5. The backlight structure according to claim 1, characterized in that: The backlight optical assembly comprises a reflective film, a light guide plate, a diffusion film, a lower brightness enhancement film and an upper brightness enhancement film which are stacked in sequence, and the reflective film is located near the bottom surface of the limiting cavity.

6. The backlight structure according to claim 5, characterized in that: It also includes a light shielding glue, which is located on a side of the upper brightness enhancement film away from the lower brightness enhancement film, and the light shielding glue is partially attached to a side of the FPC body away from the double-sided adhesive.

7. The backlight structure according to claim 1, characterized in that: A plurality of LED lamps are bound to the FPC body, and a plurality of avoidance holes are provided on the double-sided adhesive. When one side of the double-sided adhesive is attached to the FPC body, each of the avoidance holes avoids each of the LED lamps.

8. A display module, comprising the backlight structure according to any one of claims 1 to 7, characterized in that: It also includes a display screen and a cover plate, wherein the cover plate, the display screen and the backlight structure are stacked in sequence.

9. The display module according to claim 8, characterized in that: The cover plate is a glass cover plate.

10. The display module according to claim 9, characterized in that: The display screen comprises an upper polarizer, an upper glass, a lower glass and a lower polarizer which are stacked in sequence. An optical adhesive layer is arranged on a side of the upper polarizer away from the upper glass. The display screen is connected to the cover plate via the optical adhesive layer.

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