Duplex screen with adjustable backlight

Abstract

The utility model relates to the technical field of automobile parts, in particular to a backlight-adjustable duplex screen which comprises a backlight backboard, a backlight module, an FOG module, a cover plate and a PCBA control card, and the backlight backboard is provided with a containing cavity of an open structure; the backlight module comprises a first backlight assembly and a second backlight assembly, and the first backlight assembly and the second backlight assembly are arranged in the containing cavity side by side and connected with the backlight backboard. The FOG module comprises a first FOG assembly and a second FOG assembly, and the first FOG assembly and the second FOG assembly are installed in the containing cavity side by side and located on the first backlight assembly and the second backlight assembly respectively. The cover plate is connected with the first FOG assembly and the second FOG assembly, and the cover plate is connected with the open structure; the PCBA control card is electrically connected with the first backlight assembly and the second backlight assembly so as to adjust the luminance of the first backlight assembly and the luminance of the second backlight assembly respectively.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, and more specifically, to a dual screen with adjustable backlight. Background Art

[0002] A dual screen generally refers to a central control screen and an instrument screen connected together to form a whole in a car, which can save space in the car and improve the aesthetics. The central control screen is generally used for multimedia entertainment (video and music), navigation, weather, road congestion and other information display in the car, and the instrument screen is generally used to display driving information such as fuel consumption, power, speed, acceleration, etc. The central control screen displays richer content, including more colorful videos and images, and has higher brightness requirements, while the instrument screen displays simpler content, often displaying fuel consumption, power, speed, acceleration and other driving information through a monotonous color screen, and has lower brightness requirements. A screen that is too bright may be dazzling and not conducive to viewing. Therefore, the central control screen and the instrument screen have different requirements for display brightness, contrast and color saturation. At present, dual screens all share a backlight module, and it is impossible to control the brightness of a single screen separately. Utility Model Content

[0003] The utility model provides a dual screen with adjustable backlight to overcome the problem that the dual screen in the prior art adopts a structure of a shared backlight module and cannot control the brightness of a single screen separately.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a dual screen with adjustable backlight, comprising:

[0005] A backlight back plate, wherein the backlight back plate has an accommodating cavity with an open structure;

[0006] A backlight module, the backlight module comprising a first backlight assembly and a second backlight assembly, the first backlight assembly and the second backlight assembly are arranged side by side in the accommodating cavity and connected to the backlight back plate;

[0007] A FOG module, wherein the FOG module comprises a first FOG component and a second FOG component, wherein the first FOG component and the second FOG component are installed side by side in the accommodating cavity and are located on the first backlight component and the second backlight component respectively;

[0008] a cover plate, wherein the cover plate is connected to the first FOG component and the second FOG component respectively, and the cover plate is connected to the open structure; and

[0009] A PCBA control card, wherein the PCBA control card is provided with at least one, and the PCBA control card is electrically connected to the first backlight assembly and the second backlight assembly respectively to adjust the luminous brightness of the first backlight assembly and the second backlight assembly respectively.

[0010] In the technical solution of the present application, since the first backlight assembly and the second backlight assembly are arranged side by side in the accommodating cavity, the first FOG assembly is installed in the accommodating cavity and is located on the first backlight assembly, and the first FOG assembly is installed in the accommodating cavity and is located on the first backlight assembly, the PCBA control card is electrically connected to the first backlight assembly and the second backlight assembly, respectively, to respectively adjust the luminous brightness of the first backlight assembly and the second backlight assembly, thereby achieving the purpose of separately adjusting the display brightness of the first FOG assembly and the second FOG assembly.

[0011] Preferably, the backlight back plate is formed with a crossbeam located in the accommodating cavity, and the first backlight assembly and the second backlight assembly are respectively located on two sides of the crossbeam.

[0012] Preferably, a buffer structure is provided between the first FOG assembly and the first backlight assembly or / and between the second FOG assembly and the second backlight assembly.

[0013] Preferably, the first backlight assembly and the second backlight assembly are edge-type backlights or direct-type backlights.

[0014] Preferably, a side surface of the backlight back plate away from the cover plate protrudes in a direction away from the cover plate to form a mounting frame, and the PCBA control card is installed in the mounting frame.

[0015] Preferably, at least two PCBA control cards are provided, one of which is electrically connected to the first backlight assembly via a first cable, and the other PCBA control card is electrically connected to the second backlight assembly via a second cable.

[0016] Preferably, one of the PCBA control cards is electrically connected to the first FOG component via a first FPC flexible circuit board, and the other PCBA control card is electrically connected to the second FOG component via a second FPC flexible circuit board.

[0017] Preferably, the backlight back plate is provided with a plurality of through holes, and the first FPC flexible circuit board, the second FPC flexible circuit board, the first wiring harness and the second wiring harness are passed through the through holes.

[0018] Preferably, the dual screen further comprises a back cover detachably connected to the backlight back panel, the lower portion of the mounting frame is open, the cross section of the back cover is L-shaped, one side of the L-shape covers the mounting frame, and the other side of the L-shape covers the opening.

[0019] Preferably, the rear cover is provided with positioning posts, mounting buckles and mounting holes.

[0020] Compared with the prior art, the beneficial effect of the utility model is: in the utility model, since the first backlight assembly and the second backlight assembly are arranged side by side in the accommodating cavity, the first FOG assembly is installed in the accommodating cavity and is located on the first backlight assembly, and the first FOG assembly is installed in the accommodating cavity and is located on the first backlight assembly, the PCBA control card is electrically connected to the first backlight assembly and the second backlight assembly respectively to respectively adjust the luminous brightness of the first backlight assembly and the second backlight assembly, thereby achieving the purpose of separately adjusting the display brightness of the first FOG assembly and the second FOG assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an exploded view of the double screen of the utility model;

[0022] Figure 2 This is a schematic diagram of the cross-sectional structure of the double screen of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the double screen of the utility model from the rear side perspective;

[0024] Figure 4 This is a schematic diagram of the structure of the dual screen of the utility model from the rear side perspective after removing the rear cover;

[0025] Figure 5 This is a schematic diagram of the structure of a double screen using a side-entry backlight in the utility model;

[0026] Figure 6 The utility model is a schematic diagram of a double screen structure adopting a direct-down backlight.

[0027] In the attached drawings: 1. backlight back plate; 11. accommodating cavity; 2. backlight module; 21. first backlight component; 22. second backlight component; 3. FOG module; 31. first FOG component; 32. second FOG component; 4. cover plate; 5. optical glue; 6. PCBA control card; 12. crossbeam; 7. buffer structure; 13. installation frame; 9. first FPC flexible circuit board; 10. second FPC flexible circuit board; 14. through hole; 8. back cover; 81. open ; 82. Positioning column; 83. Mounting buckle; 84. Mounting hole; 23. Pressure-sensitive adhesive; 41. Structural adhesive; 61. Deserializer chip; 62. Low-voltage dropout linear regulator; 63. Power management chip; 64. Low-power linear regulator; 65. Rectifier-step-down switching converter; 66. LED driver chip; 67. HSD connector; 68. Main socket; 85. Waterproof glue; 86. Water retaining strip; 24. LED light strip; 25. Light guide plate; 26. LED light board. DETAILED DESCRIPTION

[0028] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0029] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0031] Example 1

[0032] like Figure 1 , 2 As shown, a dual screen with adjustable backlight includes:

[0033] A backlight back plate 1, wherein the backlight back plate 1 has an accommodating cavity 11 with an open structure;

[0034] A backlight module 2, the backlight module 2 comprises a first backlight assembly 21 and a second backlight assembly 22, the first backlight assembly 21 and the second backlight assembly 22 are arranged side by side in the accommodating cavity 11 and connected to the backlight back plate 1;

[0035] The FOG module 3 includes a first FOG component 31 and a second FOG component 32. The first FOG component 31 and the second FOG component 32 are installed side by side in the accommodating cavity 11 and are located on the first backlight component 21 and the second backlight component 22 respectively.

[0036] A cover plate 4, the cover plate 4 is connected to the first FOG assembly 31 and the second FOG assembly 32 respectively, and the cover plate 4 is connected to the open structure; and

[0037] The PCBA control card 6 is provided with at least one PCBA control card 6, and the PCBA control card 6 is electrically connected to the first backlight assembly 21 and the second backlight assembly 22 respectively to adjust the light emitting brightness of the first backlight assembly 21 and the second backlight assembly 22 respectively.

[0038] In this embodiment, since the first backlight assembly 21 and the second backlight assembly 22 are arranged side by side in the accommodating cavity 11 and can be connected to the backlight back panel 1 through the pressure-sensitive adhesive 23, the first FOG assembly 31 is installed in the accommodating cavity 11 and is located on the first backlight assembly 21, the first FOG assembly 31 is installed in the accommodating cavity 11 and is located on the first backlight assembly 21, and the PCBA control card 6 is electrically connected to the first backlight assembly 21 and the second backlight assembly 22 respectively to respectively adjust the luminous brightness of the first backlight assembly 21 and the second backlight assembly 22, so as to achieve the purpose of separately adjusting the display brightness of the first FOG assembly 31 and the second FOG assembly 32.

[0039] It should be noted that the glass cover plate 4 is used to protect the FOG and serve as a touch panel. The cover plate 4 can be connected to the first FOG component 31 and the second FOG component 32 through optical glue 5. The optical glue 5 is made of acrylic or silicone material and is a glue with a high light transmittance of more than 95%. It is used to fit the cover plate 4 and the first backlight component 21 and the second backlight component 22. The portion of the cover plate 4 that is not connected to the first FOG component 31 and the second FOG component 32 is connected to the backlight backplane 1 through structural glue 41. The structural glue 41 is one of PUR hot melt glue and RTV silicone rubber, both of which are cured at room temperature. The cover plate 4 is connected to the backlight backplane 1. In one embodiment, the cover plate 4 can be installed on the boss formed on the open structure. The cover plate 4 is installed on the boss and connected to the boss through the structural glue 41, and the cover plate 4 is located in the open structure 81, thereby forming a closed system for waterproofing the dual screen. The cover plate 4 can be a glass cover plate 4, and the surface of the glass cover plate 4 can be covered with functional coatings such as anti-fingerprint, anti-glare, and anti-reflection. Optionally, the glass cover plate 4 can be embedded or bonded with a touch module to realize the touch function. The first FOG component 31 and the second FOG component 32 are respectively composed of a liquid crystal display module and an FPC flexible circuit board, and are used for image and video display. The first backlight component 21 and the second backlight component 22 are respectively composed of an LED backlight source, a backlight film material and a rubber frame, which are used to provide a backlight source for the liquid crystal display. The backlight backplane 1 can be made of die-cast magnesium or aluminum alloy, as a structural support for the first backlight component 21, the second backlight component 22 and the entire display screen, and is also used for heat dissipation of the PCBA control card 6. The number of PCBA control cards 6 can be set as needed, and the PCBA control card 6 can be used to control the brightness of the first backlight component 21 and the second backlight component 22 separately, thereby realizing brightness adjustment. In addition, the PCBA control card 6 can also be used to control the display status of the first FOG component 31 and the second FOG component 32 and communicate with the cockpit domain controller. The first FOG component 31 can be used for displaying the central control screen, and the second FOG component 32 can be used for displaying the instrument screen.

[0040] The backlight back plate 1 is formed with a cross beam 12 located in the accommodating cavity 11, and the first backlight assembly 21 and the second backlight assembly 22 are respectively located on both sides of the cross beam 12. In this embodiment, since the cross beam 12 divides the accommodating cavity 11 into two installation spaces, the first backlight assembly 21 and the second backlight assembly 22 are respectively located in the two installation spaces, which can avoid the problem of mutual influence between the light emitted by the first backlight assembly 21 and the second backlight assembly 22, thereby improving the accuracy of brightness adjustment of the first FOG assembly 31 and the second FOG assembly 32.

[0041] In addition, a buffer structure 7 is provided between the first FOG assembly 31 and the first backlight assembly 21 or / and between the second FOG assembly 32 and the second backlight assembly 22. The provision of the buffer structure 7 is conducive to protecting the first FOG assembly 31 and the first backlight assembly 21, and the second FOG assembly 32 and the second backlight assembly 22. It should be noted that the buffer structure 7 is black, and the buffer structure 7 is installed in the crossbeam 12, which can also prevent the problem of light leakage in the dual screen. In addition, the buffer structure 7 can be a buffer foam, and the buffer foam can be black.

[0042] In addition, the first backlight assembly 21 and the second backlight assembly 22 are edge-type backlights or direct-type backlights. The first backlight assembly 21 and the second backlight assembly 22 can be divided into two types according to the different ways of emitting light from the backlight: edge-type backlights and direct-type backlights. Figure 5 As shown, the edge-type backlight module 2 includes a light guide plate 25, and the backlight source is an LED light bar 24 on the side of the light guide plate. The light guide plate 25 is provided with a plurality of light guide points, whose function is to convert the point light source emitted by the LED light bar 24 into a surface light source through diffuse reflection. Figure 6 As shown, the direct-type backlight module 2 does not include a light guide plate, and the backlight source is an LED light board 26 at the bottom of the backlight module 2 .

[0043] like Figure 5 As shown, in the dual-screen structure with dual backlight sources and split light guide, the crossbeam 12 in the backlight back panel 1 separates the first backlight component 21 from the second backlight component 22, and two side-emitting LED light strips 24 and two split light guide plates 25 are used to guide light respectively. The left and right light guide plates 25 are respectively coupled to the left and right LED light strips 24 to limit the light to their respective light guide plate 25 areas to prevent light leakage. The brightness of the two side-emitting LED light strips 24 is controlled separately, so that the brightness of a single screen can be controlled, and the brightness of the first FOG component 31 and the second FOG component 32 can be more reasonable.

[0044] like Figure 6 As shown, in the dual-screen structure of the dual mini LED backlight module, there is no light guide plate, and the crossbeam 12 in the backlight backplane 1 separates the first backlight component 21 from the second backlight component 22. The backlight source is a surface light source LED lamp board 25 at the bottom of the first backlight component 21 and the second backlight component 22. The LED lamp board 25 adopts min LED backlight source and min LED backlight source. Since the surface light source is directly used as the backlight of the display screen, the brightness of a single screen can be controlled.

[0045] Example 2

[0046] like Figures 1 to 4As shown, the difference from implementation 1 is that the side of the backlight back panel 1 away from the cover plate 4 protrudes in the direction away from the cover plate 4 to form a mounting frame 13, and the PCBA control card 6 is installed in the mounting frame 13. Since the PCBA control card 6 is installed in the mounting frame 13 instead of in the accommodating cavity 11, the thickness of the entire accommodating cavity 11 can be reduced, making the thickness of the backlight back panel 1 thinner. The PCBA control card 6 adopts such an installation position, which is also conducive to the subsequent maintenance of the PCBA control card 6. It should be noted that the PCBA control card 6 is located in the mounting frame 13 and can be fixedly installed on the backlight back panel 1 by a screw structure.

[0047] In addition, at least two PCBA control cards 6 are provided, one of which is electrically connected to the first backlight assembly 21 through a first cable, and the other PCBA control card 6 is electrically connected to the second backlight assembly 22 through a second cable. In this embodiment, two PCBA control cards 6 are provided as needed to control the brightness of the first backlight assembly 21 and the second backlight assembly 22, respectively.

[0048] Among them, one PCBA control card 6 is electrically connected to the first FOG component 31 through the first FPC flexible circuit board 9, and the other PCBA control card 6 is electrically connected to the second FOG component 32 through the second FPC flexible circuit board 10. In this embodiment, two PCBA control cards 6 are set as needed to control the screen display of the first FOG component 31 and the second FOG component 32 respectively. It should also be noted that the single PCBA control card 6 includes a deserializer chip 61, a low-voltage difference linear regulator 62, a power management chip 63, a low-power linear regulator 64, a rectifier buck switch converter 65 and an LED driver chip 66. The PCBA control card 6 is provided with an HSD connector 67 connected to the cockpit domain controller, and a main socket 68 is connected to the power supply. The deserializer chip 61 is used to convert the serial data transmitted from the smart cockpit domain controller into parallel data, the power management chip 63 is used for power management of the display screen, and the LED driver chip 66 is used to adjust the brightness of the LED light sources in the first backlight assembly 21 and the second backlight assembly 22.

[0049] In addition, a plurality of through holes 14 are provided on the backlight back panel 1, and the first FPC flexible circuit board 9, the second FPC flexible circuit board 10, the first cable and the second cable are passed through the through holes 14. In this embodiment, due to the provision of the through holes 14, the first FPC flexible circuit board 9, the second FPC flexible circuit board 10, the first cable and the second cable can connect the PCBA control card 6 located in the mounting frame 13 and the first backlight assembly 21, the second backlight assembly 22, the first FOG assembly 31 and the second FOG assembly 32 located in the accommodating cavity 11.

[0050] The dual screen further includes a back cover 8 detachably connected to the backlight back panel 1, the lower part of the mounting frame 13 is open 81, the cross section of the back cover 8 is L-shaped, one side of the L-shape covers the mounting frame 13, and the other side of the L-shape covers the opening 81. It should be noted that the back cover 8 can be made of die-cast aluminum alloy, which is used for structural support of the dual screen, protection of the PCBA control card 6 and installation of the entire dual screen. The back cover 8 can be connected to the backlight back panel 1 through a screw structure, and a waterproof glue 85 can be provided at the connection between the back cover 8 and the mounting frame 13 for waterproofing.

[0051] Example 3

[0052] like Figure 3 As shown, the difference from Examples 1 and 2 is that the rear cover 8 is provided with a positioning column 82, a mounting buckle 83 and a mounting hole 84. In this embodiment, as needed, six mounting buckles 83 and one positioning column 82 may be provided on the rear cover 8 for installation and positioning of the dual screen on the car, thereby saving the mounting bracket and reducing the weight and volume of the dual screen. In addition, as needed, four mounting holes 84 may be provided on the rear cover 8 for exposing the HSD connector 67 and the main socket 68 of the two PCBA control cards 6 to the outside, so as to facilitate the main socket 68 to connect to the power supply and the HSD connector 67 to be used for electrical connection with the cockpit domain controller, so as to realize the cockpit domain controller's control of the dual screen, and the HSD connector 67 is used for high-speed transmission of image and video signals. In order to prevent water from entering the installation frame 13 through the gap between the HSD connector 67, the main socket 68 and the installation hole 84 and affecting the PCBA control card 6, a water barrier 86 is provided on the back cover 8 and above the installation hole 84, and the extension sections on both sides of the water barrier 86 enclose the installation hole 84, thereby achieving a better waterproof effect.

[0053] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A dual screen with adjustable backlight, characterized in that: include A backlight back plate (1), wherein the backlight back plate (1) has a receiving cavity (11) with an open structure; A backlight module (2), the backlight module (2) comprising a first backlight assembly (21) and a second backlight assembly (22), the first backlight assembly (21) and the second backlight assembly (22) being arranged side by side in the accommodating cavity (11) and connected to the backlight back plate (1); A FOG module (3), the FOG module (3) comprising a first FOG component (31) and a second FOG component (32), the first FOG component (31) and the second FOG component (32) being installed side by side in the accommodating cavity (11) and respectively located on the first backlight component (21) and the second backlight component (22); A cover plate (4), the cover plate (4) being connected to the first FOG component (31) and the second FOG component (32) respectively, and the cover plate (4) being connected to the open structure; as well as A PCBA control card (6), wherein the PCBA control card (6) is electrically connected to the first backlight assembly (21) and the second backlight assembly (22) respectively so as to adjust the light luminance of the first backlight assembly (21) and the second backlight assembly (22) respectively.

2. The dual screen with adjustable backlight according to claim 1, characterized in that: The backlight back plate (1) is formed with a crossbeam (12) located in the accommodating cavity (11), and the first backlight assembly (21) and the second backlight assembly (22) are respectively located on two sides of the crossbeam (12).

3. The dual screen with adjustable backlight according to claim 2, characterized in that: A buffer structure (7) is provided between the first FOG component (31) and the first backlight component (21) or / and between the second FOG component (32) and the second backlight component (22).

4. The dual screen with adjustable backlight according to claim 1, characterized in that: The first backlight assembly (21) and the second backlight assembly (22) are edge-type backlights or direct-type backlights.

5. The dual screen with adjustable backlight according to any one of claims 1 to 4, characterized in that: A mounting frame (13) is formed on the side of the backlight back plate (1) away from the cover plate (4) and protrudes in a direction away from the cover plate (4), and the PCBA control card (6) is mounted in the mounting frame (13).

6. The dual screen with adjustable backlight according to claim 5, characterized in that: At least two PCBA control cards (6) are provided, one of which is electrically connected to the first backlight assembly (21) via a first cable, and the other PCBA control card (6) is electrically connected to the second backlight assembly (22) via a second cable.

7. The dual screen with adjustable backlight according to claim 6, characterized in that: One of the PCBA control cards (6) is electrically connected to the first FOG component (31) via a first FPC flexible circuit board (9), and the other PCBA control card (6) is electrically connected to the second FOG component (32) via a second FPC flexible circuit board (10).

8. The dual screen with adjustable backlight according to claim 7, characterized in that: The backlight back plate (1) is provided with a plurality of through holes (14), and the first FPC flexible circuit board (9), the second FPC flexible circuit board (10), the first array of cables and the second array of cables are passed through the through holes (14).

9. The dual screen with adjustable backlight according to claim 5, characterized in that: The dual screen further comprises a back cover (8) detachably connected to the backlight back panel (1); the lower portion of the installation frame (13) is open (81); the cross section of the back cover (8) is L-shaped, one side of the L-shape covers the installation frame (13), and the other side of the L-shape covers the opening (81).

10. The dual screen with adjustable backlight according to claim 9, characterized in that: The rear cover (8) is provided with a positioning column (82), a mounting buckle (83) and a mounting hole (84).

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