Liquid crystal display screen suitable for projection

Abstract

The utility model relates to the technical field of liquid crystal display screens, in particular to a liquid crystal display screen suitable for projection, which comprises a liquid crystal display screen panel, a display screen main body, a shell A and a shell B, and further comprises a limiting ring, a mounting groove and a positioning ring are arranged on the front side of the limiting ring, and the liquid crystal display screen can slide on the inner sides of the mounting groove and the positioning ring. The limiting ring is fixedly connected with the inner side of the shell B; the positioning ring is fixedly connected with the rear side of the shell A; mounting holes are formed in the upper ends of the outer sides of the mounting shell and the shell B, the mounting shell can slide on the inner sides of the mounting holes, and a connecting ring is fixed to the outer side of the mounting shell and detachably connected with the upper side of the shell B; the outer side of the roller is used for installing projection cloth; and a folding and unfolding unit. Through the arrangement of the mounting shell, the roller, the C-shaped connecting strip, the protection plate A, the protection plate B and the folding and unfolding unit, the projection cloth can be automatically folded and unfolded in front and back of the display screen, projection can be carried out more conveniently, and the use convenience of the display screen is improved.

Description

Technical Field

[0001] This utility model relates to the field of liquid crystal display technology, and in particular to a liquid crystal display suitable for projection. Background Technology

[0002] Liquid crystal displays (LCDs) are a type of flat-panel display used in television and computer screens. Their advantages include low power consumption, small size, and low radiation.

[0003] Projection refers to projecting the shape of an object onto a plane using a set of rays; the resulting image on that plane is also called a "projection." Projections can be divided into orthographic projection and oblique projection. Orthographic projection occurs when the center line of the projection rays is perpendicular to the projection plane; oblique projection occurs when the center line of the projection rays is not perpendicular to the projection plane.

[0004] With societal progress, people are increasingly using projectors alongside displays to play or watch videos and materials, creating optimal viewing environments for themselves.

[0005] Since the optimal viewing position is usually fixed, a projection screen or projection board needs to be placed in front of the display screen to ensure projection quality when switching between the monitor and projector. However, this requires frequent swapping and storage, which is inconvenient. Therefore, we propose a liquid crystal display screen suitable for projection to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies where the optimal viewing position is usually fixed, requiring the placement of a projection cloth or projection board in front of the display screen to ensure projection quality when switching between the display screen and projector. This process is inconvenient due to the need for frequent replacement and storage. Therefore, this invention proposes a liquid crystal display screen suitable for projection.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] Design a liquid crystal display screen suitable for projection, including a liquid crystal display panel, a display body, an A-shell, and a B-shell, wherein the rear side of the A-shell and the front side of the B-shell are detachably connected, the liquid crystal display panel and the display body are connected via a cable strip, and the display body is installed inside the B-shell, and further includes:

[0009] A limiting ring is provided with a mounting groove and a positioning ring on its front side. The liquid crystal display screen can slide inside the mounting groove and the positioning ring. The limiting ring is fixedly connected to the inner side of the B shell, and the positioning ring is fixedly connected to the rear side of the A shell.

[0010] The mounting shell has a mounting hole at the upper outer side of the outer shell B. The mounting shell can slide inside the mounting hole. A connecting ring is fixed to the outer side of the mounting shell. The connecting ring is detachably connected to the upper side of the outer shell B.

[0011] A protective plate, wherein a C-shaped connecting strip is installed on the lower side of the A protective plate, the C-shaped connecting strip is fixedly connected to the upper side of the mounting shell, and a B protective plate is installed on the lower side of the mounting shell;

[0012] A roller, located inside the mounting housing, with the outer side of the roller used to mount the projection cloth;

[0013] A take-up and release unit is located between the roller and the mounting housing.

[0014] Preferably, an L-shaped positioning plate is provided on the rear side of the mounting shell, and the B protective plate is located inside the L-shaped positioning plate. The L-shaped positioning plate is fixedly connected to the inner side of the B outer shell.

[0015] By adopting the above technical solution, the L-shaped positioning plate can play a limiting and supporting role for the mounting shell, making the mounting shell more stable.

[0016] Preferably, the take-up and take-down unit includes a motor and a counterweight. The counterweight is located on the front side of the A-shell. The projection cloth passes through the opening of the C-shaped connecting strip and is connected to the counterweight. A connecting shaft is installed on the inner side of the roller. The connecting shaft is rotatably connected to the inner side of the mounting shell. Four A-positioning grooves are provided on the inner side of the roller. Positioning strips slide on the inner side of the A-positioning grooves. The positioning strips are fixedly connected to the outer side of the connecting shaft. A partition is installed on the upper side of the motor. The partition is installed on the inner side of the mounting shell. The motor shaft end and the connecting shaft are connected by a gear and rack meshing transmission. The connecting shaft and the inner side of the mounting shell are provided with positioning units. The motor is connected to the main body of the display screen through wires.

[0017] By adopting the above technical solution, the take-up and release unit can rotate the roller, allowing the projected cloth on the roller to be automatically taken up and released under the action of the counterweight, thus improving the convenience of use.

[0018] Preferably, the positioning unit includes a double-ended electric slide rail, and L-shaped moving plates are provided on both the left and right sides of the roller. One side of the L-shaped moving plate is provided with an A-shaped through hole, and a clamping ring is rotatably provided inside the A-shaped through hole. The clamping ring is provided with four sliding grooves inside, and the positioning strip can slide inside the sliding grooves. The clamping ring can slide outside the connecting shaft. The double-ended electric slide rail is installed on the upper side of the partition plate. The L-shaped moving plate is connected to the moving end of the double-ended electric slide rail. The double-ended electric slide rail is connected to the display screen body through a wire.

[0019] By adopting the above technical solution, the positioning unit can clamp and position the roller, making the roller more stable when it is not rotating.

[0020] Preferably, the front side of the A outer shell has two C-shaped limiting strips and two C-shaped limiting blocks fixed, and two adjusting bolts are provided on the front side of the A outer shell. The C-shaped limiting strips are located between the two C-shaped limiting blocks, and the adjusting bolts are located between the C-shaped limiting strips and the C-shaped limiting blocks. The counterweight bar can slide inside the C-shaped limiting strips. The inner side of the C-shaped limiting strips is provided with a B positioning groove. A moving block slides inside the C-shaped limiting blocks. The moving block can slide inside the B positioning groove. The upper side of the moving block is provided with several threaded holes, and the adjusting bolts are detachably connected to the inner side of the threaded holes by threads.

[0021] By adopting the above technical solution, the projection screen is stretched as straight as possible by turning the adjusting bolt so that it rests against the upper side of the counterweight bar, thus improving the projection effect.

[0022] Preferably, the L-shaped movable plate is provided with guide grooves on both the front and rear sides, and four guide strips are fixed inside the mounting shell, the guide strips being slidable inside the guide grooves.

[0023] By adopting the above technical solution, the guide bar will guide and position the L-shaped moving plate, making the movement of the L-shaped moving plate more stable.

[0024] Preferably, auxiliary rods are rotatably provided on both the upper side of the outer shell and the inner side of the mounting shell, and the auxiliary rods are located on the upper side of the roller.

[0025] By adopting the above technical solution, the auxiliary rod plays a guiding role in the movement of the projection screen, making the raising and lowering of the projection screen more stable.

[0026] The present invention provides a liquid crystal display screen suitable for projection, which has the following advantages:

[0027] 1. By setting up a mounting shell, rollers, C-shaped connecting strips, A protective plate, B protective plate, and retraction unit, the projection cloth can be automatically retracted and extended in front of and behind the display screen, making projection more convenient and improving the ease of use of the display screen.

[0028] 2. By setting up positioning units, the projection screen can be straightened as much as possible, thus improving projection quality. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the front three-dimensional structure of a liquid crystal display screen suitable for projection proposed in this utility model;

[0030] Figure 2 The present utility model proposes Figure 1 A magnified three-dimensional structural diagram of a portion of area A in the middle;

[0031] Figure 3 The present utility model proposes Figure 1 A magnified three-dimensional structural diagram of a portion of area B in the middle section;

[0032] Figure 4 This is a schematic diagram of the left-side cross-sectional three-dimensional structure of a liquid crystal display screen suitable for projection proposed in this utility model;

[0033] Figure 5 The present utility model proposes Figure 4 A magnified three-dimensional structural diagram of a portion of the central C area;

[0034] Figure 6 The present utility model proposes Figure 5 A magnified three-dimensional structural diagram of a portion of the central D region.

[0035] In the diagram: 1. LCD screen panel; 2. Display screen body; 3. A outer shell; 4. B outer shell; 5. Limiting ring; 6. Mounting shell; 7. Roller; 8. Retracting / unloading unit; 81. Motor; 82. Counterweight bar; 83. Connecting shaft; 84. Positioning bar; 85. Partition plate; 86. Auxiliary rod; 9. Positioning unit; 91. L-shaped moving plate; 92. Clamping ring; 93. C-shaped limiting bar; 94. C-shaped limiting block; 95. Adjusting bolt; 96. Moving block; 97. Guide bar; 98. Double-end electric slide rail; 10. A protective plate; 11. Positioning ring; 12. Connecting ring; 13. C-shaped connecting bar; 14. B protective plate; 15. L-shaped positioning plate. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0037] Reference Figure 1-6 A liquid crystal display screen suitable for projection includes a liquid crystal display panel 1, a display body 2, an A-shell 3 and a B-shell 4. The rear side of the A-shell 3 and the front side of the B-shell 4 are detachably connected. The liquid crystal display panel 1 and the display body 2 are connected by a cable strip. The display body 2 is installed inside the B-shell 4. The display body 2 is used for control and power supply. At the same time, the display body 2 is connected to the power supply through a power cord, and the power interface is installed on the B-shell 4. It also includes: a limiting ring 5, a mounting shell 6, a roller 7, a take-up and take-down unit 8, and an A-protection plate 10.

[0038] The front side of the limiting ring 5 is provided with a mounting groove and a positioning ring 11. The LCD screen can slide inside the mounting groove and the positioning ring 11. The limiting ring 5 is fixedly connected to the inner side of the B shell 4, and the positioning ring 11 is fixedly connected to the rear side of the A shell 3. The limiting ring 5 and the positioning ring 11 play a positioning role for the LCD screen panel 1, so that the LCD screen panel 1 can be better installed. Then, the A shell 3 and the B shell 4 are connected together, so that the LCD screen panel 1, the display body 2, the A shell 3 and the B shell 4 constitute an LCD screen.

[0039] A C-shaped connecting strip 13 is installed on the lower side of the A protective plate 10. The C-shaped connecting strip 13 is fixedly connected to the upper side of the mounting shell 6. A B protective plate 14 is installed on the lower side of the mounting shell 6. The upper outer side of the B shell 4 is provided with a mounting hole. The mounting shell 6 can slide inside the mounting hole. An L-shaped positioning plate 15 is provided on the rear side of the mounting shell 6. The B protective plate 14 is located inside the L-shaped positioning plate 15. The L-shaped positioning plate 15 is fixedly connected to the inner side of the B shell 4. The L-shaped positioning plate 15 can provide limiting support for the mounting shell 6, making the mounting shell 6 more stable. A connecting ring 12 is fixed on the outer side of the mounting shell 6. The connecting ring 12 is detachably connected to the upper side of the B shell 4. The mounting shell 6, the A protective plate 10, the C-shaped connecting strip 13 and the B protective plate 14 constitute a long shell. The connecting ring 12 allows the long shell to be installed from top to bottom in the mounting hole on the B shell 4, allowing the long shell and its internal structure to be quickly installed and disassembled.

[0040] Roller 7 is located inside mounting shell 6, and the outer side of roller 7 is used to mount the projection cloth. Retraction unit 8 is located between roller 7 and mounting shell 6. Retraction unit 8 includes a motor 81 and a counterweight 82. The counterweight 82 is located on the front side of shell A 3. The projection cloth passes through the opening of C-shaped connecting strip 13 and connects to the counterweight 82. Auxiliary rods 86 are rotatably mounted on the upper side of shell A 3 and the inner side of mounting shell 6. The auxiliary rods 86 are located on the upper side of roller 7 and provide auxiliary guidance for the movement of the projection cloth, making the retraction and mounting of the projection cloth more stable. A connecting shaft 83 is installed inside roller 7 and is rotatably connected to the inner side of mounting shell 6. Four A-positioning grooves are provided inside roller 7, and positioning strips 84 slide inside the A-positioning grooves. The positioning bar 84 is fixedly connected to the outside of the connecting shaft 83. A partition 85 is installed on the upper side of the motor 81. The partition 85 is installed inside the mounting shell 6. The shaft end of the motor 81 is connected to the connecting shaft 83 through gear and rack meshing. The motor 81 is connected to the display screen body 2 through wires. The motor 81 drives the connecting shaft 83 to rotate inside the mounting shell 6 through the gear and rack. The connecting shaft 83 drives the roller 7 to rotate through the positioning bar 84. The roller 7 will carry the projection cloth to be extended and retracted. Under the action of gravity, the counterweight bar 82 straightens the projection cloth. It can automatically retract the projection cloth into the mounting shell 6, or allow the projection cloth to be unfolded in front of the display screen, so that the projector can project on the projection cloth, which improves the convenience of use.

[0041] A positioning unit 9 is provided inside the connecting shaft 83 and the mounting housing 6. The positioning unit 9 includes a double-ended electric slide rail 98. L-shaped moving plates 91 are provided on both the left and right sides of the roller 7. Guide grooves are provided on both the front and rear sides of the L-shaped moving plates 91. Four guide bars 97 are fixed inside the mounting housing 6. The guide bars 97 can slide inside the guide grooves, guiding and positioning the L-shaped moving plates 91, making their movement more stable. An A-hole is provided on one side of the L-shaped moving plate 91. A clamping ring 92 rotates inside the A-hole. Four sliding grooves are provided inside the clamping ring 92. The positioning bar 84 can slide inside the sliding grooves, and the clamping ring 92 can slide outside the connecting shaft 83. The double-ended electric slide rail 98... 8 is installed on the upper side of partition 85. The L-shaped moving plate 91 is connected to the moving end of the double-ended electric slide rail 98. The double-ended electric slide rail 98 is connected to the display screen body 2 through wires. The double-ended electric slide rail 98 carries the two L-shaped moving plates 91 and moves in opposite directions within the mounting shell 6. The L-shaped moving plates 91 move together with the clamping rings 92. The positioning strip 84 can guide the clamping rings 92 and allow the clamping rings 92 to rotate together with the connecting shaft 83. When the two clamping rings 92 clamp and position the roller 7, the probability of the roller 7 rotating is reduced under the action of friction, making the roller 7 more stable when it is not rotating, thus improving the stability of the device.

[0042] Two C-shaped limiting strips 93 and two C-shaped limiting blocks 94 are fixed to the front side of the outer casing 3. Two adjusting bolts 95 are also provided on the front side of the outer casing 3. The C-shaped limiting strips 93 are located between the two C-shaped limiting blocks 94, and the adjusting bolts 95 are located between the C-shaped limiting strips 93 and the C-shaped limiting blocks 94. A counterweight 82 can slide inside the C-shaped limiting strips 93. A B-positioning groove is provided inside the C-shaped limiting strips 93. A moving block 96 slides inside the C-shaped limiting blocks 94, and the moving block 96 can slide inside the B-positioning groove. Several threaded holes are provided on the upper side of the moving block 96 for adjustment. Bolt 95 is detachably connected to the inner side of the threaded hole via threads. C-type limit strip 93 guides the counterweight 82, making the movement of the counterweight 82 more stable. When the counterweight 82 moves to the lower side, the moving block 96 is located on the upper side of the counterweight 82. Move the moving block 96 into the B positioning groove, so that the C-type limit block 94 and C-type limit strip 93 limit the moving block 96. Then, turn the adjusting bolt 95 so that the adjusting bolt 95 is pressed against the counterweight 82. With the help of the positioning unit 9, the projection cloth is stretched as straight as possible, improving the projection effect.

[0043] In the description of this patent, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two components. For those skilled in the art, the specific meaning of the above terms in this patent can be understood according to the specific circumstances.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A liquid crystal display screen suitable for projection, comprising a liquid crystal display panel (1), a display body (2), an A-shell (3), and a B-shell (4), wherein the rear side of the A-shell (3) and the front side of the B-shell (4) are detachably connected, the liquid crystal display panel (1) and the display body (2) are connected by a cable strip, and the display body (2) is mounted inside the B-shell (4), characterized in that, Also includes: The limiting ring (5) has an installation groove and a positioning ring (11) on its front side. The liquid crystal display screen can slide inside the installation groove and the positioning ring (11). The limiting ring (5) is fixedly connected to the inner side of the B shell (4), and the positioning ring (11) is fixedly connected to the rear side of the A shell (3). Mounting shell (6), the upper outer side of the outer shell (4) of B is provided with mounting hole, the mounting shell (6) can slide inside the mounting hole, the outer side of the mounting shell (6) is fixed with a connecting ring (12), the connecting ring (12) is detachably connected to the upper side of the outer shell (4); A protective plate (10), a C-shaped connecting strip (13) is installed on the lower side of the A protective plate (10), the C-shaped connecting strip (13) is fixedly connected to the upper side of the mounting shell (6), and a B protective plate (14) is installed on the lower side of the mounting shell (6); Roller (7), the roller (7) is located inside the mounting shell (6), and the outside of the roller (7) is used to mount the projection cloth; The take-up and release unit (8) is located between the roller (7) and the mounting shell (6).

2. A liquid crystal display screen suitable for projection according to claim 1, characterized in that, The mounting shell (6) is provided with an L-shaped positioning plate (15) on the rear side, and the B protection plate (14) is located inside the L-shaped positioning plate (15). The L-shaped positioning plate (15) is fixedly connected to the inner side of the B outer shell (4).

3. A liquid crystal display screen suitable for projection according to claim 1, characterized in that, The take-up and take-down unit (8) includes a motor (81) and a counterweight (82). The counterweight (82) is located on the front side of the A-shell (3). The projection cloth passes through the opening of the C-shaped connecting strip (13) and is connected to the counterweight (82). A connecting shaft (83) is installed on the inner side of the roller (7). The connecting shaft (83) is rotatably connected to the inner side of the mounting shell (6). Four A-positioning grooves are provided on the inner side of the roller (7). A positioning strip (84) slides on the inner side of the A-positioning groove. The positioning strip (84) is fixedly connected to the outer side of the connecting shaft (83). A partition (85) is installed on the upper side of the motor (81). The partition (85) is installed on the inner side of the mounting shell (6). The shaft end of the motor (81) is connected to the connecting shaft (83) through gear and rack meshing. A positioning unit (9) is provided on the inner side of the connecting shaft (83). The motor (81) is connected to the main body of the display screen (2) through a wire.

4. A liquid crystal display screen suitable for projection according to claim 3, characterized in that, The positioning unit (9) includes a double-ended electric slide rail (98). The roller (7) is provided with L-shaped moving plates (91) on both the left and right sides. The L-shaped moving plate (91) has an A-hole on one side. A clamping ring (92) is rotatably mounted inside the A-hole. The clamping ring (92) has four sliding grooves on its inner side. The positioning strip (84) can slide inside the sliding grooves. The clamping ring (92) can slide outside the connecting shaft (83). The double-ended electric slide rail (98) is mounted on the upper side of the partition plate (85). The L-shaped moving plate (91) is connected to the moving end of the double-ended electric slide rail (98). The double-ended electric slide rail (98) is connected to the display screen body (2) through a wire.

5. A liquid crystal display screen suitable for projection according to claim 4, characterized in that, The front side of the A shell (3) is fixed with two C-shaped limiting strips (93) and two C-shaped limiting blocks (94), and the front side of the A shell (3) is provided with two adjusting bolts (95). The C-shaped limiting strips (93) are located between the two C-shaped limiting blocks (94), and the adjusting bolts (95) are located between the C-shaped limiting strips (93) and the C-shaped limiting blocks (94). The counterweight strip (82) can slide inside the C-shaped limiting strips (93). The inner side of the C-shaped limiting strips (93) is provided with a B positioning groove. The inner side of the C-shaped limiting blocks (94) is provided with a moving block (96). The moving block (96) can slide inside the B positioning groove. The upper side of the moving block (96) is provided with several threaded holes. The adjusting bolts (95) are detachably connected to the inner side of the threaded holes by threads.

6. A liquid crystal display screen suitable for projection according to claim 4, characterized in that, The L-shaped movable plate (91) has guide grooves on both the front and rear sides. The mounting shell (6) has four guide strips (97) fixed inside. The guide strips (97) can slide inside the guide grooves.

7. A liquid crystal display screen suitable for projection according to claim 2, characterized in that, An auxiliary rod (86) is rotatably mounted on the upper side of the outer shell (3) and the inner side of the mounting shell (6), and the auxiliary rod (86) is located on the upper side of the roller (7).

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