Large-size light-weight high-strength narrow-frame display screen structure

Abstract

The utility model provides a large-size light-weight high-strength narrow-frame display screen structure which comprises a back shell, the back shell is made of magnesium aluminum alloy, an open groove is formed in the inner wall of the back shell, an LED lamp strip, a light guide plate, a membrane material assembly and a middle iron frame are sequentially arranged in the back shell, the edge of the membrane material assembly is arranged right opposite to the open groove, and the middle iron frame is arranged in the open groove. The membrane material assembly is pressed and fixed through the Z-shaped middle iron frame, and the edge of the middle iron frame is upwards buckled and pressed on the back shell. According to the invention, the back shell made of the magnesium-aluminum alloy is adopted, the weight is reduced, the passive heat dissipation effect is improved, the open grooves for accommodating the size change of the membrane material assembly prevent the membrane material from being extruded during high-temperature expansion, the internal assemblies are reduced, the safety gap between the assemblies is reduced, and the width of printing ink needing to be shielded by the glass cover plate is reduced; and the black edge of the display screen assembly is narrowed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of screen, in particular to a large-size light-weight high-strength narrow-frame display screen structure. BACKGROUND

[0002] The main components of the screen are composed of LCM screen assembly, front shell, PCBA, mounting bracket and rear shell. The LCM screen assembly is composed of glass cover plate, LCD screen, film material, light guide plate and metal back plate. The LCD display screen itself cannot emit light and mainly relies on LED light source as backlight source. The light guide plate and the film material convert the light source, and different color patterns are displayed through the liquid crystal flip.

[0003] The larger the size of the display screen is, the greater the size change of the film material caused by thermal expansion and cold contraction is, the greater the gap reserved between the film material and the metal back light plate is, and the wider the black edge area covered by the glass cover plate needs to be. If the black edge is reduced, the light of the internal back light plate is easy to leak out from the edge of the LCD display screen. SUMMARY

[0004] To solve the above problems, the present application discloses a large-size light-weight high-strength narrow-frame display screen structure, which comprises a back shell, the material of the back shell is magnesium-aluminum alloy, and a slot is formed in the inner wall of the back shell. Compared with injection molding, the use of magnesium-aluminum alloy increases the structural strength of the back shell and reduces the overall weight.

[0005] The inside of the back shell is sequentially provided with an LED light belt, a light guide plate and a film material assembly, and the edge of the film material is opposite to the slot. First, the back shell made of magnesium-aluminum alloy increases the passive heat dissipation effect, and the influence of thermal expansion and cold contraction of the film material is small. If the size of the film material changes, the deformation space reserved by the slot avoids the edge light leakage caused by the bulging of the film material.

[0006] The light guide plate and the film material assembly are fixed in the back shell by being pressed by a middle iron frame, the edge section contour of the middle iron frame is "Z" shape, and the edge of the middle iron frame is buckled on the back shell. The middle iron frame is used to improve the overall structural strength of the screen, and the metal can also prevent LED light from leaking to a certain extent.

[0007] Preferably, the display screen structure further comprises a glass cover plate, an OCR glue, an LCD screen and an RTV glue coated on the edge of the back shell, the glass cover plate is fully attached to the LCD screen through the OCR glue, and the glass cover plate and the LCD screen assembly are adhered to the back shell and the middle iron frame through the RTV glue. The glass cover plate plays a protective role, and the RTV glue is used for fixing the glass cover plate and sealing the screen.

[0008] Preferably, the inner side edge of the upper end of the middle iron frame is provided with a foam, and the foam supports the LCD screen. The foam plays a buffering role and protects the LCD screen.

[0009] The beneficial effects of the present invention are as follows: the use of a magnesium-aluminum alloy back shell not only reduces weight, but also improves the effect of passive heat dissipation, and the slots set to accommodate changes in film material size reduce the ink width of the glass cover and avoid arching or light leakage at the edge of the screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the edge local structure of the present invention.

[0011] List of reference numerals:

[0012] 1. Back shell; 2. Slots; 3. Light guide plate; 4. Film material; 5. LCD screen; 6. OCR glue; 7. Foam; 8. Middle iron frame; 9. Glass cover; 10. RTV glue. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a particular component, respectively.

[0014] like Figure 1 As shown, a large-size, lightweight, high-strength, narrow-frame display screen structure includes a back shell 1. The back shell 1 is an integrated structure with a mounting bracket and other structures on the back. The back shell 1 is made of magnesium-aluminum alloy, which is beneficial to reducing the weight of the device and improving the heat dissipation effect. The inner wall of the back shell 1 is provided with a groove 2.

[0015] Inside the back shell 1, a fixed structure consisting of a light guide plate 3, a film assembly 4, and a central iron frame 1 is sequentially arranged. The film assembly 4 includes a diffuser film, a BEF film, and a DBEF film. The edge of the film assembly 4 is positioned directly opposite the slot 2. Due to factors such as thermal expansion and contraction, the film assembly 4 can undergo dimensional changes. The slot 2 provides a deformation cavity for the film 4, preventing issues such as film bulging or light leakage at the screen edge caused by dimensional changes.

[0016] The membrane material assembly 4 and the back shell 1 are provided with a middle iron frame 8, which improves the structural strength of the screen. The cross-sectional profile of the edge of the middle iron frame is "Z"-shaped. The edge of the middle iron frame 8 is pressed upward on the back shell 1, and the inner edge of the middle iron frame 8 is pressed on the membrane material 4 to achieve a fixing effect.

[0017] The back shell 1 is covered with a glass cover plate 9, which is fully bonded to the LCD screen 5 through OCR glue 6, and then the glass cover plate is bonded to the back shell 1 and the middle iron frame 8 through RTV glue 10. The RTV glue 10 fixes the glass cover plate 9 and seals the screen at the same time.

[0018] The inner edge of the upper end of the middle iron frame 8 is provided with foam 7, which supports the back of the LCD screen 5. The foam 7 plays a role of buffering and protecting the LCD screen 5.

[0019] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above-mentioned embodiment, but also include technical solutions composed of any combination of the above technical features.

Claims

1. A large-size, lightweight, high-strength, narrow-frame display screen structure, characterized in that: It comprises a back shell (1), the material of the back shell (1) is a magnesium-aluminum alloy, and the inner wall of the back shell (1) is provided with a groove (2); The interior of the back shell (1) is sequentially provided with a light guide plate (3), a film material assembly (4), and a middle iron frame (8), and the edge of the film material assembly (4) is arranged opposite to the slot (2); The light guide plate (3) and the film material assembly (4) are pressed and fixed in the back shell (1) by the middle iron frame (8); the edge cross-sectional profile of the middle iron frame is "Z"-shaped, and the edge of the middle iron frame (8) is buckled upward on the back shell (1).

2. The large-size, lightweight, high-strength, narrow-frame display screen structure according to claim 1, characterized in that: The display screen structure further comprises a glass cover plate (9), OCR glue (6), an LCD screen (5), and RTV glue (10) applied to the edge of the back shell (1). The glass cover plate (9) is fully bonded to the LCD screen (5) via the OCR glue (6), and the glass cover plate and LCD screen assembly are bonded to the back shell (1) and the middle iron frame (8) via the RTV glue (10).

3. The large-size, lightweight, high-strength, narrow-frame display screen structure according to claim 1, characterized in that: The inner edge of the upper end of the middle iron frame (8) is provided with foam (7), and the foam (7) supports the LCD screen (5).

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