Double-sided display multi-screen spliced vehicle-mounted display device for rail transit

Abstract

The utility model discloses a double-sided display multi-screen spliced vehicle-mounted display device for rail transit. The double-sided display multi-screen spliced vehicle-mounted display device comprises a display unit, a backlight part and a control unit, each display unit comprises a front surface and a rear surface, at least two pairs of display units are arranged, each display unit corresponds to one liquid crystal panel, and the adjacent display units are seamlessly spliced; the backlight part is positioned between the two front and back display units; and the control unit is arranged at the top of the display unit and is connected with the display unit. By means of the mode, the vehicle-mounted display device integrates attractiveness and functionality, and the problems that an existing spliced display screen product is cumbersome in appearance, not attractive enough and wide in splicing seam, and display units on the two sides of a double-face screen are large in visual difference and poor in lighting effect are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of displays, and in particular to a vehicle-mounted display device with double-sided display and multi-screen splicing for rail transportation. Background Art

[0002] In-vehicle displays are crucial information and entertainment devices in modern vehicles. They not only provide essential vehicle operating data but also offer entertainment content such as audio, video, and games. With technological advancements, they are becoming an indispensable part of modern vehicles. However, existing similar products suffer from drawbacks such as bulky appearance, lack of aesthetic appeal, and wide seams. Inconsistent or even poor visual quality on both sides of double-sided displays (e.g., moiré patterns, dot patterns, and brightness variations) is also a common problem with these products.

[0003] The wide seam width is mainly affected by the black border width of the LCD panel. The conventional splicing method of TFT LCD panels is to connect one side of the two LCD panels and mount them on the same horizontal plane. The black border on one side of the TFT LCD panel is a, and the other side is b. The size of the spliced ​​black border is one side black border a + structural gap + one side black border b. The splicing width cannot be lower than (a+b); this limits the selectable screen and seam sizes.

[0004] The commonly used technology for the light guide plate (LGP) in existing products of this type is to produce dots on one side. The size and sparseness of the dots determine the backlight brightness. If this method is directly used for double-sided display, it will cause dot leakage on one side of the display, which is visible externally. In addition, there is a large difference in brightness between the front and rear LCD panels, and even moiré patterns are generated with the film or liquid crystal, which can cause dizziness when viewed. Utility Model Content

[0005] The utility model proposes a vehicle-mounted display device for double-sided display and multi-screen splicing at track intersections, which overcomes the problems of existing spliced ​​display screen products such as bulky appearance, poor aesthetics, wide splicing seams, large visual differences between display units on both sides of the double-sided display screen, and poor lighting efficiency.

[0006] In order to solve the above technical problems, the present invention is implemented through the following technical solutions:

[0007] A double-sided display multi-screen splicing vehicle-mounted display device for rail transportation, comprising: a display unit, a backlight unit, and a control unit;

[0008] The display unit includes a front and a back surface, and there are at least two pairs of them. Each display unit corresponds to a liquid crystal panel, and adjacent display units are seamlessly spliced ​​together.

[0009] The backlight portion is located between the front and rear display units;

[0010] The control unit is arranged on the top of the display unit and is connected to the display unit.

[0011] Preferably, the backlight portion is fixed by side frames and vertical frames;

[0012] The liquid crystal panel is mounted on the side frames and vertical frames.

[0013] Preferably, the side frames are located at both ends of the backlight unit, and the backlight unit is connected to the slots of the side frames;

[0014] The vertical frame is arranged between adjacent liquid crystal panels.

[0015] Preferably, the side frame is provided with a stepped surface 1 for mounting the liquid crystal panel;

[0016] The side frame is provided with a second step surface for carrying the outer cover plate.

[0017] Preferably, the backlight unit includes a brightness enhancement sheet, a diffusion sheet, and a light guide plate, and is arranged in a matching pattern of the brightness enhancement sheet, the diffusion sheet, the light guide plate, the diffusion sheet, and the brightness enhancement sheet.

[0018] Preferably, the light guide plate has dots on both sides, and the liquid crystal panels spliced ​​on the front and back sides and the left and right sides share one light guide plate.

[0019] Preferably, a grounding column is provided outside the control unit.

[0020] Preferably, the outer cover plate is made of glass or metal.

[0021] The beneficial effects of the utility model are:

[0022] The utility model discloses a vehicle-mounted display device with double-sided display and multi-screen splicing for rail transit. The overall structure is simple and beautiful. The backlight part is located between the front and rear display units and is fixed by side frames and vertical frames. The outermost side is provided with an outer cover plate. By vertically cutting the liquid crystal panels, the splicing of the left and right liquid crystal panels is not restricted by the black edges of the liquid crystal, thereby realizing seamless splicing of the liquid crystal panels. By designing the light guide plate as a double-sided network point and the front and rear, left and right spliced ​​liquid crystal panels share a light guide plate, the common problem of poor backlight efficiency of existing double-sided display screen products is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of a preferred embodiment of a vehicle-mounted display device with double-sided display and multi-screen splicing for rail transportation according to the utility model;

[0024] Figure 2 This is a partial schematic diagram of a double-sided display multi-screen splicing vehicle display device for rail transportation Figure 1 ;

[0025] Figure 3 This is a partial schematic diagram of a double-sided display multi-screen splicing vehicle display device for rail transportation Figure 2 ;

[0026] The markings of the components in the accompanying drawings are as follows:

[0027] 1. Display unit; 1-1. LCD panel 1; 1-2. LCD panel 2; 1-3. LCD panel 3; 1-4. LCD panel 4; 2. Backlight; 3. Control unit; 4. Side frame; 4-1. Card slot; 4-2. Step surface 1; 4-3. Step surface 2; 5. Vertical frame; 6. Outer cover panel. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0029] Example:

[0030] This embodiment introduces a double-sided display multi-screen splicing vehicle-mounted display device for rail transit.

[0031] Combined with attachment Figure 1 、 2 As shown, Figure 1 This is a schematic diagram of the three-dimensional structure of a preferred embodiment of a double-sided display multi-screen splicing vehicle-mounted display device for rail transportation of the utility model. Figure 2 This is a partial schematic diagram of a double-sided display multi-screen splicing vehicle display device for rail transportation Figure 1 .

[0032] A double-sided display multi-screen splicing vehicle-mounted display device for rail transit, comprising: a display unit 1, a backlight unit 2, and a control unit 3;

[0033] The display unit 1 includes two surfaces, front and back, and there are at least two pairs. Each display unit 1 corresponds to a liquid crystal panel, and adjacent display units are seamlessly spliced ​​together.

[0034] The backlight unit 2 is located between the front and rear display units 1;

[0035] The control unit 3 is disposed on the top of the display unit 1 and is connected to the display unit 1 to control the display unit.

[0036] In this embodiment, the front and rear pairs of display units are used as an example. The display unit 1 includes two pairs of display units 1, each display unit 1 corresponds to a liquid crystal panel, namely liquid crystal panel 1 1-1, liquid crystal panel 2 1-2, liquid crystal panel 3 1-3, and liquid crystal panel 4 1-4.

[0037] like Figure 3 As shown, Figure 3 This is a partial schematic diagram of a double-sided display multi-screen splicing vehicle display device for rail transportation Figure 2 .

[0038] The backlight unit 2 is fixed by side frames 4 and vertical frames 5; the side frames 4 are located at both ends of the backlight unit 2, and the backlight unit 2 is embedded in the card slots 4-1 of the side frames 4;

[0039] The liquid crystal panel is mounted on the side frames 4 and the vertical frames 5 .

[0040] In this embodiment, on the front display unit, the mullion 5 is disposed between adjacent liquid crystal panels 1-1 and 1-2; similarly, on the rear display unit, the mullion 5 is disposed between adjacent liquid crystal panels 1-3 and 1-4. The mullion supports the liquid crystal panels.

[0041] Furthermore, the side frame 4 is provided with a stepped surface 4-2 for mounting the liquid crystal panel;

[0042] The side frame 4 is provided with a step surface 4 - 3 for carrying the outer cover plate 6 .

[0043] In this embodiment, the outer cover plate 6 adopts a whole plate structure, and the material can be glass or metal. Here, the glass panel is used to protect the liquid crystal panel and greatly improve the aesthetics of the product.

[0044] Because the outer cover panel is made of glass, the glass outer cover panel 6 is fixed to the side frame 4 and the vertical frame 5 with RTV silicone. RTV silicone has extremely strong bonding strength and is suitable for bonding and sealing between a variety of metals and between metal and non-metallic materials. It greatly saves the space for bolt installation commonly used in the rail industry, improves the integrity of the structure, and improves the aesthetics.

[0045] Furthermore, the backlight is crucial in displaying a double-sided screen. Conventional backlights use a combination of reflection, light guide plates, diffusers, and brightness enhancement films, which are single-sided. If double-sided illumination is required, two independent backlights must be superimposed and used. This approach will greatly increase the thickness of the product and increase the cost. Therefore, in this solution, the double-sided display screen adopts a shared backlight mode, that is, a dual-sided lighting function. The backlight unit 2 includes a brightness enhancement film, a diffuser, and a light guide plate, and is arranged in a combination of brightness enhancement films, diffusers, light guide plates, diffusers, and brightness enhancement films. This combination mode solves the problems of space and cost, and also provides a foundation for ultra-thin displays.

[0046] Furthermore, to address issues such as inconsistent visual effects on the display units on both sides of a double-sided display, this embodiment employs a double-sided dot design on the light guide plate (LGP), with the front and back panels sharing a single LGP. Light is refracted by the dot patterns on both sides of the LGP, ensuring uniform and consistent illumination from both sides of the display units and resolving the issue of brightness differences between single-sided dots on a double-sided screen. The increased brightness of the dot patterns on both sides also allows for adjustments and improvements to be made to their visibility. Furthermore, the double-sided dot design is more energy-efficient and efficient, significantly improving light utilization.

[0047] The double-sided dots on the light guide plate can be precisely designed using laser dotting, embossing, or chemical etching. The size, shape, and distribution of the dots (dot size is directly related to the visibility of the display unit) are precisely designed. This achieves uniform light output from both sides, improving the display effect while ensuring brightness while also ensuring the visibility of the dots on the display unit. Both sides of the light guide plate (LGP) can be equipped with diffusers, brightening films, and bidirectional brightness enhancement films (DBEF), with the angles designed based on the LCD panel. This design can solve the problems of LGP dot visibility, moiré patterns, dizziness, and brightness differences on both sides of existing double-sided displays.

[0048] The double-sided display screen in this embodiment is a spliced ​​screen. The backlight part abandons the conventional multi-backlight design. The front and back double-sided and left and right spliced ​​liquid crystal panels share a light guide plate, which further ensures the consistency of the display screen's lighting effect.

[0049] Furthermore, to enhance the aesthetics of double-sided display products, the joint width between adjacent left and right LCD panels is minimized or even seamless. This embodiment utilizes a vertical cutting method commonly used in LCD panel cutting processes. A cutter wheel / laser tool is used to remove excess black borders from the LCD panels, and the cut surfaces are then sealed with adhesive. This eliminates the black borders that restrict the joint between the left and right LCD panels, leaving only a structural gap, enabling seamless splicing.

[0050] Furthermore, the control unit 3 is fixed to the outer cover plate 6 outside the display unit by bolts, which does not occupy the display space and has no impact on the visual effect.

[0051] The side frames, vertical frames, and control unit structure in this embodiment are all made of metal, ensuring excellent thermal conductivity, heat dissipation, and metal continuity. A grounding post is provided on the outside of the control unit. This ensures that this display device, while being ultra-thin and aesthetically pleasing, also possesses the necessary safety, fire resistance, and electromagnetic interference resistance required in the industrial field.

[0052] In this embodiment, the backlight unit is designed in the center of the display device, secured on the outside by side frames and mullions. The LCD panel is mounted on the side frame and mullion platforms, and a cover plate is placed on the outermost surface. Through a simple and rational structural arrangement and an effective backlight solution, the entire display unit meets the market demand for ultra-thin, reliable, and aesthetically pleasing double-sided displays with seamless splicing. This solves the common problem of poor backlighting efficiency on both sides of a double-sided display, as well as the problem of wide black borders on LCD panels that limit the width of the splicing area, making seamless splicing of LCD panels possible.

[0053] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A double-sided display multi-screen splicing vehicle-mounted display device for rail transportation, characterized in that: include: Display unit, backlight unit (2), control unit (3); The display unit (1) comprises a front and a back surface, and there are at least two pairs of them. Each display unit (1) corresponds to a liquid crystal panel, and adjacent display units (1) are seamlessly spliced ​​together. The backlight unit (2) is located between the front and rear display units (1); The control unit (3) is arranged on the top of the display unit (1) and is connected to the display unit (1).

2. The vehicle-mounted display device with double-sided display and multiple screens for rail transit according to claim 1, characterized in that: The backlight portion (2) is fixed by side frames (4) and vertical frames (5); The liquid crystal panel is mounted on the side frame (4) and the vertical frame (5).

3. The vehicle-mounted display device with double-sided display and multiple screens for rail transit according to claim 2, characterized in that: The side frames (4) are located at both ends of the backlight portion (2), and the backlight portion (2) is connected to the card slots (4-1) of the side frames (4); The vertical frame (5) is arranged between adjacent liquid crystal panels.

4. The double-sided display multi-screen splicing vehicle-mounted display device for rail transit according to claim 2, characterized in that: The side frame (4) is provided with a stepped surface (4-2) for carrying the liquid crystal panel; The side frame (4) is provided with a second step surface (4-3) for carrying the outer cover plate (6).

5. The vehicle-mounted display device with double-sided display and multiple screens for rail transportation according to claim 1, characterized in that: The backlight part (2) comprises a brightness enhancement sheet, a diffusion sheet, and a light guide plate, and is arranged in a matching pattern of the brightness enhancement sheet, the diffusion sheet, the light guide plate, the diffusion sheet, and the brightness enhancement sheet.

6. The vehicle-mounted display device with double-sided display and multiple screens for rail transportation according to claim 5, characterized in that: The light guide plate has double-sided dots, and the liquid crystal panels spliced ​​on the front and back sides and the left and right sides share one light guide plate.

7. The double-sided display multi-screen splicing vehicle-mounted display device for rail transit according to claim 1, characterized in that: A grounding column is provided outside the control unit (3).

8. The double-sided display multi-screen splicing vehicle-mounted display device for rail transit according to claim 4, characterized in that: The material of the outer cover plate (6) includes glass or metal.

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