CN219266749U

CN219266749U - Liquid crystal display device for improving edge bright line

Info

Publication number: CN219266749U
Application number: CN202320275477.5U
Authority: CN
Inventors: 李春平; 阳耀启; 张锦炀; 张树航; 樊劼
Original assignee: Xinli Photoelectric Renshou Co Ltd
Current assignee: Xinli Photoelectric Renshou Co Ltd
Priority date: 2023-02-21
Filing date: 2023-02-21
Publication date: 2023-06-27
Anticipated expiration: 2033-02-21

Abstract

The utility model discloses a liquid crystal display device for improving edge bright lines, which comprises a light source module and a display module, wherein the display module is arranged on a light emitting surface of the light source module, the light source module comprises a light enhancement film, the light enhancement film comprises a prism structure, and the stretching direction of the light enhancement film is perpendicular to the prism trend of the prism structure; the display module comprises a display area, two first frames and two second frames, wherein the width of the first frames is larger than that of the second frames; the two first frames are oppositely arranged outside the two sides of the display area along the stretching direction of the brightness enhancement film, and the two second frames are oppositely arranged outside the two sides of the display area along the prism trend of the prism structure. The liquid crystal display device can change the problem that edge bright lines occur due to shrinkage of the brightness enhancement film.

Description

Liquid crystal display device for improving edge bright line

Technical Field

The present utility model relates to the field of display, and more particularly, to a liquid crystal display device for changing bright lines at an edge.

Background

The liquid crystal display device has a large number of advantages such as thin body, power saving, no radiation, etc., and is widely used in liquid crystal televisions, mobile phones, personal digital assistants, digital cameras, computer screens, notebook computer screens, etc. The liquid crystal display device generally comprises a light source module and a display module, wherein in order to improve the light emergent brightness of the light source module, a brightness enhancement film is generally arranged in the light source module, and the prism structure on the surface of the brightness enhancement film is utilized to gather and then emergent light in all directions so as to achieve the aim of brightness enhancement.

As disclosed in chinese patent No. CN201220305654.1, a liquid crystal display device includes: the light source comprises a light enhancement film, a diffusion film, a black-and-white adhesive tape, a flexible circuit board, a light emitting diode, a reflecting sheet and a light guide plate; further comprises: the non-transparent firmware is positioned on the reflecting sheet at the lowest layer and is provided with a light guide plate and a light emitting diode; a diffusion film and a light enhancement film are sequentially and tightly adhered to the light guide plate; the diffusion film is electrically connected with the light-emitting diode; the brightness enhancement film is tightly attached to the black-and-white adhesive tape on the flexible circuit board; the non-transparent firmware is positioned in the gap between the brightness enhancement film, the diffusion film, the flexible circuit board and the black-and-white adhesive tape.

However, since the light enhancement film is a PET film, it is used as a roll material of a certain width after being stretched on a PET raw material of a certain size, and the stretching direction thereof is perpendicular to the prism direction thereof. The brightness enhancement film is more prone to shrink in the stretch direction after prolonged exposure to high temperatures. In the existing liquid crystal display device, the prism trend of the brightness enhancement film is arranged along the up-down direction, the stretching direction of the prism trend is arranged along the left-right direction, and in order to achieve attractive appearance, the frames on the left side and the right side of the liquid crystal display device are narrower, and some liquid crystal display devices even cancel the frames on the left side and the right side, so that when the brightness enhancement film contracts along the left-right direction, the frames on the left side and the right side of the liquid crystal display device have the problem of edge bright lines due to light leakage of the brightness enhancement film.

Disclosure of Invention

In order to solve the above-mentioned shortcomings of the prior art, the present utility model provides a liquid crystal display device, which can change the problem of edge bright line caused by shrinkage of the brightness enhancement film.

The technical problems to be solved by the utility model are realized by the following technical scheme:

the liquid crystal display device comprises a light source module and a display module, wherein the display module is arranged on a light emitting surface of the light source module, the light source module comprises a light enhancement film, the light enhancement film comprises a prism structure, and the stretching direction of the light enhancement film is perpendicular to the prism trend of the prism structure; the display module comprises a display area, two first frames and two second frames, wherein the width of the first frames is larger than that of the second frames; the two first frames are oppositely arranged outside the two sides of the display area along the stretching direction of the brightness enhancement film, and the two second frames are oppositely arranged outside the two sides of the display area along the prism trend of the prism structure.

Further, the two first frames and the two second frames are sequentially connected in an alternating mode and end to end so as to surround the display area.

Further, the brightness enhancement film comprises a central area, two first extension areas oppositely arranged outside the central area along the stretching direction of the brightness enhancement film, and two second extension areas oppositely arranged outside the central area along the prism direction of the prism structure, wherein the central area corresponds to the display area of the display module, the two first extension areas respectively correspond to the two first frames of the display module, and the two second extension areas respectively correspond to the two second frames of the display module; the width of the first extension region is greater than the width of the second extension region.

Further, the brightness enhancement film comprises a flexible film, the prism structure is arranged on the flexible film, the prism structure comprises a plurality of microprisms, and the microprisms are arranged on the flexible film in parallel along the stretching direction of the brightness enhancement film.

Further, the display module comprises a first polarizing film, an array substrate arranged on the first polarizing film, a liquid crystal material arranged on the array substrate, a color film substrate arranged on the liquid crystal material and a second polarizing film arranged on the color film substrate.

Further, the array substrate comprises a TFT array, wherein pm= (pb×pr)/(pb-pr) is satisfied between the TFT density of the TFT array and the prism density of the brightness enhancement film, where pm is the expected interference fringe density, and pb and pr are the TFT density of the TFT array and the prism density of the brightness enhancement film, respectively.

Further, the light source module further comprises a frame, a light guide plate and a backlight light bar, wherein the light guide plate and the backlight light bar are arranged in the frame, and the light guide plate and the backlight light bar are fixedly arranged with the frame; the backlight light bar is arranged on the light incident surface of the light guide plate, and the light enhancement film is arranged on the light emergent surface of the light guide plate.

Further, the light source module further comprises a reflecting film and a diffusion film, wherein the reflecting film is arranged on one surface of the light guide plate, which faces back, and the diffusion film is arranged between the light guide plate and the light enhancement film.

Further, the display device also comprises a light source FPC electrically connected with the light source module and a main screen FPC electrically connected with the display module.

Further, the light source FPC and the main screen FPC are the same FPC.

The utility model has the following beneficial effects: according to the liquid crystal display device, the two first frames with larger widths on the display module are oppositely arranged on two sides of the display module along the stretching direction of the intensifying film, when the intensifying film is contracted along the stretching direction in a high-temperature environment, although the light source module can form light leakage on the two sides of the intensifying film along the stretching direction, the two first frames of the display module are larger than the second frame in width, so that a sufficient shielding range can be formed at the light leakage position of the light source module, and the problem of edge bright lines caused by contraction of the intensifying film is further relieved.

Drawings

Fig. 1 is a schematic stacking diagram of a liquid crystal display device according to the present utility model.

Fig. 2 is a schematic diagram of a display module and a brightness enhancement film in a liquid crystal display device according to the present utility model.

Fig. 3 is a schematic view of a region of a brightness enhancement film in a liquid crystal display device according to the present utility model.

Fig. 4 is an array schematic diagram of an array substrate in a liquid crystal display device according to the present utility model.

Detailed Description

The present utility model is described in detail below with reference to the drawings and the embodiments, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", or a third "may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, or can be communicated between two elements or the interaction relationship between the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Example 1

As shown in fig. 1 and 2, a liquid crystal display device for changing an edge bright line includes a light source module 1 and a display module 2, wherein the display module 2 is disposed on a light emitting surface of the light source module 1, the display module 2 is used for providing a display image, and the backlight module 1 is used for providing backlight light for the display module 2 to light the display image of the display module 2; the light source module 1 comprises a light enhancement film 15, wherein the light enhancement film 15 is used for gathering and emitting light rays in all directions in the light source module 1; the brightness enhancement film 15 includes a prism structure 152, the stretching direction of the brightness enhancement film 15 is perpendicular to the prism direction of the prism structure 152, and the stretching direction of the brightness enhancement film 15 refers to the direction when the brightness enhancement film 15 is stretched from a raw material with a certain size to form a coiled material with a certain width; the display module 2 includes a display area 200, two first frames 20a and two second frames 20b, wherein the width of the first frames 20a is larger than the width of the second frames 20b, the widths of the two first frames 20a are generally different, the widths of the two second frames 20b are generally the same, and the width of the first frame 20a with smaller width is still larger than the width of the second frame 20b with larger width; the two first frames 20a are oppositely disposed outside the two sides of the display area 200 along the stretching direction of the brightness enhancement film 15, and the two second frames 20b are oppositely disposed outside the two sides of the display area 200 along the prism direction of the prism structure 152.

In this liquid crystal display device, by disposing the two first frames 20a with larger widths on the display module 2 on the two sides of the display module 2 along the stretching direction of the light enhancement film 15, when the light enhancement film 15 is shrunk in the stretching direction under a high temperature environment, although the light source module 1 may form light leakage on the two sides of the stretching direction of the light enhancement film 15, the two first frames 20a of the display module 2 have larger widths than the second frames 20b, so that a sufficient shielding range can be formed for the light leakage position of the light source module 1, thereby reducing the problem of edge bright lines caused by shrinkage of the light enhancement film 15.

The two first frames 20a and the two second frames 20b are sequentially spaced apart and connected end to end so as to surround the display area 200; as shown in fig. 3, the brightness enhancement film 15 includes a central area 150, two first extension areas 15a oppositely disposed outside the central area 150 along two sides of the stretching direction of the brightness enhancement film 15, and two second extension areas 15b oppositely disposed outside the central area 150 along two sides of the prism direction of the prism structure 152, wherein the central area 150 corresponds to the display area 200 of the display module 2, the two first extension areas 15a respectively correspond to the two first frames 20a of the display module 2, and the two second extension areas 15b respectively correspond to the two second frames 20b of the display module 2; the width of the first extension region 15a is greater than the width of the second extension region 15 b.

The light enhancement film 15 includes a flexible film 151, the prism structure 152 is disposed on the flexible film 151, the prism structure 152 includes a plurality of microprisms, and each microprism is arranged on the flexible film 151 in parallel along the stretching direction of the light enhancement film 15.

The flexible film 151 is made of PET or other polymer, and is not limited thereto.

The liquid crystal display device further comprises a light source FPC (not shown in the figure) electrically connected with the light source module 1 and a main screen FPC (not shown in the figure) electrically connected with the display module 2, wherein the light source FPC and the main screen FPC are electrically connected with a PCB of the liquid crystal display device to realize signal transmission.

In some embodiments, the light source FPC and the main screen FPC are the same FPC, that is, the light source module 1 and the display module 2 are electrically connected to the PCB of the liquid crystal display device by the same FPC to realize signal transmission.

Example two

As an optimization scheme of the first embodiment, in this embodiment, as shown in fig. 1, the light source module 1 further includes a frame 11, and a light guide plate 13 and a backlight bar (not shown in the figure) disposed in the frame 11, where the light guide plate 13 and the backlight bar are fixedly disposed with the frame 11; the backlight bar is disposed on the light incident surface of the light guide plate 13, and the light enhancement film 15 is disposed on the light emergent surface of the light guide plate 13.

The point light rays emitted by the backlight light bars enter the light guide plate 13 from the side surface of the light guide plate 13 to form plane light rays, and exit from the upper surface of the light guide plate 13 to the display module 2 to provide backlight light rays for the display module 2. The frame 11 generally comprises a metal back plate and a rubber frame, the rubber frame is fixedly arranged on the metal back plate, and the light guide plate 13 and the backlight lamp strip are arranged in a space enclosed by the metal back plate and the rubber frame; the light guide plate 13 and the backlight bar are fixed with the rubber frame by bonding or limiting. The display module 2 is arranged and supported on the rubber frame.

In some embodiments, in order to implement the narrow bezel display, the frame 11 has the glue frame removed, and only the metal back plate remains, and the light guide plate 13 and the backlight bar are both fixed on the metal back plate, or the light guide plate 13 is fixed on the metal back plate, and the backlight bar is fixed on the light guide plate 13. The display module 2 is arranged and supported on the light guide plate 13, or the metal backboard is bent upwards from the four directions to extend out of a side plate, and the side plate extends to be in contact with the back surface of the display module 2 and is supported and fixed.

The material of the metal backboard is iron or aluminum alloy material, and is not limited.

The light source module 1 further includes a diffusion film 14 and a reflection film 12 disposed in the frame 11, the reflection film 12 is disposed on a surface of the light guide plate 13 opposite to the light enhancement film 15, and the diffusion film 14 is disposed between the light guide plate 13 and the light enhancement film 15.

The reflecting film 12 is used for reflecting the light transmitted to the lower surface of the light guide plate 13 back into the light guide plate 13 again so as to improve the light utilization rate; the diffusion film 14 is used for further diffusing the light emitted from the light guide plate 13, so that the light emitted from the light guide plate 13 is more uniform.

The display module 2 and the light enhancement film 15 on the light guide plate 13 should have a certain gap, that is, the display module 2 and the light enhancement film 15 are not in contact with each other, so that the interference between the display module 2 and the light enhancement film 15 can be prevented, and the display effect is affected.

The display module 2 includes a first polarizing film 21, an array substrate 22 disposed on the first polarizing film 21, a liquid crystal material (not shown) disposed on the array substrate 22, a color film substrate 23 disposed on the liquid crystal material, and a second polarizing film 24 disposed on the color film substrate 23.

Example III

As an optimization scheme of the second embodiment, in this embodiment, as shown in fig. 4, the array substrate 22 includes a TFT array 221, where pm is a desired interference fringe density, pb and pr are respectively the TFT density of the TFT array 221 and the prism density of the brightness enhancement film 15, and pm= (pb×pr)/(pb-pr) is satisfied between the TFT density of the TFT array 221 and the prism density of the brightness enhancement film 15.

The backlight light of the light source module 1 is continuously transmitted through the brightness enhancement film 15 and the array substrate 22, and is subjected to the grating effect of the prism structure 152 on the brightness enhancement film 15 when transmitted through the brightness enhancement film 15, and is also subjected to the grating effect of the TFT array 221 on the array substrate 22 when transmitted through the array substrate 22, and interference phenomena can occur between the backlight light respectively formed by the two grating effects, so that interference fine twills between bright and dark phases visible to naked eyes appear after the display module 2 is lightened, thereby influencing the display effect; the degree of the interference fine diagonal is related to the degree of the interference of the light rays, which is related to the prism density of the light enhancement film 15 and the TFT density of the TFT array 221.

The present embodiment adjusts the prism density of the brightness enhancement film 15 and the TFT density of the TFT array 221, so as to adjust the interference degree of the light, so as to control the density of the interference fringes of the light within the expected range.

Finally, it should be noted that the foregoing embodiments are merely for illustrating the technical solution of the embodiments of the present utility model and are not intended to limit the embodiments of the present utility model, and although the embodiments of the present utility model have been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the embodiments of the present utility model may be modified or replaced with the same, and the modified or replaced technical solution may not deviate from the scope of the technical solution of the embodiments of the present utility model.

Claims

1. The liquid crystal display device comprises a light source module and a display module, wherein the display module is arranged on a light emitting surface of the light source module, the light source module comprises a light enhancement film, the light enhancement film comprises a prism structure, and the stretching direction of the light enhancement film is perpendicular to the prism trend of the prism structure; the display module comprises a display area, two first frames and two second frames, wherein the width of the first frames is larger than that of the second frames; the display device is characterized in that two first frames are oppositely arranged outside two sides of the display area along the stretching direction of the brightness enhancement film, and two second frames are oppositely arranged outside two sides of the display area along the prism trend of the prism structure.

2. The liquid crystal display device of claim 1, wherein two first frames and two second frames are sequentially spaced apart and connected end to surround the display area.

3. The liquid crystal display device for improving bright lines of edges according to claim 2, wherein the brightness enhancement film comprises a central area, two first extension areas oppositely arranged outside two sides of the central area along the stretching direction of the brightness enhancement film, and two second extension areas oppositely arranged outside two sides of the central area along the prism direction of the prism structure, the central area corresponds to a display area of the display module, the two first extension areas respectively correspond to two first frames of the display module, and the two second extension areas respectively correspond to two second frames of the display module; the width of the first extension region is greater than the width of the second extension region.

4. The liquid crystal display device for improving an edge brightness line according to claim 1, wherein the brightness enhancement film comprises a flexible film, the prism structure is disposed on the flexible film, the prism structure comprises a plurality of microprisms, and each microprism is arranged in parallel on the flexible film along a stretching direction of the brightness enhancement film.

5. The liquid crystal display device of claim 1, wherein the display module comprises a first polarizing film, an array substrate disposed on the first polarizing film, a liquid crystal material disposed on the array substrate, a color film substrate disposed on the liquid crystal material, and a second polarizing film disposed on the color film substrate.

6. The liquid crystal display device of claim 5, wherein the array substrate comprises a TFT array, wherein pm= (pb x pr)/(pb-pr) is satisfied between a TFT density of the TFT array and a prism density of the brightness enhancement film, wherein pm is a desired interference fringe density, and pb and pr are a TFT density of the TFT array and a prism density of the brightness enhancement film, respectively.

7. The liquid crystal display device for improving edge brightness according to claim 1, wherein the light source module further comprises a frame, and a light guide plate and a backlight bar disposed in the frame, the light guide plate and the backlight bar being fixedly disposed with the frame; the backlight light bar is arranged on the light incident surface of the light guide plate, and the light enhancement film is arranged on the light emergent surface of the light guide plate.

8. The liquid crystal display device of claim 7, wherein the light source module further comprises a reflective film and a diffusion film, the reflective film is disposed on a back surface of the light guide plate and the light enhancement film, and the diffusion film is disposed between the light guide plate and the light enhancement film.

9. The liquid crystal display device of claim 1, further comprising a light source FPC electrically connected to the light source module and a main screen FPC electrically connected to the display module.

10. The liquid crystal display device for improving an edge bright line according to claim 9, wherein the light source FPC and the main screen FPC are the same FPC.