CN216622918U

CN216622918U - Fresnel lens capable of cooling and protecting TFT

Info

Publication number: CN216622918U
Application number: CN202123264693.XU
Authority: CN
Inventors: 陈军辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-05-27
Anticipated expiration: 2031-12-23

Abstract

The utility model discloses a Fresnel lens for cooling protection of a TFT (thin film transistor), which comprises a base plate and a lens assembly, wherein the base plate, an LED (light emitting diode) lamp and the lens assembly are arranged above the LED lamp, and a TFT screen is arranged above the lens assembly. This fresnel lens who plays cooling protection to TFT, the levelness that can the different positions of real-time detection when the installation of lens body is carried out and is adjusted, it throws to TFT screen surface to be the straight line after passing the lens body for light, thereby be favorable to improving the definition, and the lens body is located between LED lamp and the TFT screen, can lose the energy when playing thermal-insulated effect light and seeing through the lens body, can avoid the TFT screen directly to receive the heat influence of LED lamp, and the flexible cover surface of ripple has evenly seted up miniature through-hole, make things convenient for the heat effluvium of LED lamp.

Description

Fresnel lens capable of cooling and protecting TFT

Technical Field

The utility model relates to the technical field of TFT screens, in particular to a Fresnel lens for cooling protection of a TFT.

Background

The TFT screen is one of the active matrix type liquid crystal display, generally the light that is sent out by the LED lamp throws the TFT screen to, and the TFT screen can "initiatively" control each independent pixel on the screen, can improve reaction time greatly like this, the reaction time of general TFT is relatively fast, about 80 milliseconds, and visual angle is big, generally can reach about 130 degrees, mainly use in high-end product.

The LED lamp is easy to generate heat when directly projecting light to a TFT screen, so that the TFT screen is heated, the TFT screen is easy to damage due to overheating after long-time operation, and therefore, the Fresnel lens which plays a role of cooling protection for the TFT is provided.

Disclosure of Invention

The utility model aims to provide a Fresnel lens for cooling protection of a TFT (thin film transistor), and aims to solve the problems that the existing LED lamp is easy to generate heat when directly projecting light to a TFT screen, so that the TFT screen is heated, and the TFT screen is easy to be damaged due to overheating after long-time operation.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a Fresnel lens who plays cooling protection to TFT, includes bottom plate, LED lamp and lens subassembly, LED lamp top be provided with the lens subassembly, the top of lens subassembly is provided with the TFT screen.

Furthermore, the surface of the bottom plate is provided with an LED lamp in a fitting manner, and a Fresnel lens is adopted as a lens in the lens assembly.

Furthermore, the Fresnel lens is positioned between the LED lamp and the TFT screen, so that the effect of preventing the TFT screen from being directly influenced by the heat of the LED lamp is achieved, and the effect of improving the imaging definition is achieved.

Further, the lens subassembly includes installation frame and lens body, the inside embedding of installation frame has the lens body, and the lens subassembly still includes spout, pulley, spirit level and adjusting bolt, the spout has been seted up on the surface of installation frame, the inside of spout is provided with the pulley, and the top of pulley is rotated and is connected with the spirit level, adjusting bolt has been run through to the inside of edge of installation frame, adjusting bolt and bottom plate threaded connection, and adjusting bolt are provided with four altogether, the lens body is fresnel lens promptly.

Furthermore, light rays emitted by the LED lamp can penetrate through the lens body and are projected to the surface of the TFT screen in parallel and uniformly.

Furthermore, the upper surface of spirit level and the upper surface of installation frame are located same horizontal plane, and the spirit level passes through pulley, spout and installation frame sliding connection.

Furthermore, the shapes of the TFT screen, the lens body and the LED lamp are consistent, and the vertical central axes of the TFT screen, the lens body and the LED lamp are coincident.

Furthermore, the bottom outside of adjusting bolt is provided with shields the subassembly, shield the subassembly and include spring housing, flexible cover of ripple and miniature through-hole, the flexible cover of ripple is connected to the bottom of spring housing, and the surface of the flexible cover of ripple has seted up miniature through-hole.

Furthermore, the top of the spring sleeve is fixedly connected with the bottom of the mounting frame, and the inner wall of the spring sleeve is parallel to the outer wall of the adjusting bolt.

Furthermore, the corrugated expansion sleeve is of a structure like a Chinese character 'kou', and the micro through holes are uniformly distributed on the surface of the corrugated expansion sleeve.

The utility model provides a Fresnel lens for cooling protection of a TFT, which has the following beneficial effects:

the levelness that can real-time detection different positions when the installation of lens body is adjusted for light is the straight line after passing the lens body and throws to TFT screen surface, thereby is favorable to improving the definition, and the lens body is located between LED lamp and the TFT screen, can lose the energy when playing thermal-insulated effect light and seeing through the lens body, can avoid the TFT screen directly to receive the thermal influence of LED lamp.

1. According to the utility model, the level gauge has the function of detecting levelness, and the level gauge is matched with the pulley to slide along the inside of the sliding chute, so that different positions of the mounting frame can be subjected to level monitoring, and whether the lens body is horizontal to the LED lamp or not is favorably determined, and the light is prevented from deflecting after passing through the lens body.

2. According to the utility model, the leveling instrument is matched, the adjusting bolt is rotated to enable the mounting frame carried by the leveling instrument to be lifted corresponding to one corner, so that the levelness of the lens body is favorably adjusted, the display result of the leveling instrument is observed at the same time until the lens body is adjusted to be horizontal, and therefore, the light rays are favorably enabled to be projected in parallel after passing through the lens body, and the light rays are enabled to be uniformly distributed on the surface of the TFT screen.

3. According to the utility model, the four corners of the installation frame are raised or lowered due to the rotation of the adjusting bolts, at the moment, the bottom of the corrugated expansion sleeve is always attached to the surface of the bottom plate and wraps the periphery of the LED lamp through the elasticity of the spring sleeve, so that external dust and impurities cannot enter, and the surface of the corrugated expansion sleeve is uniformly provided with the micro through holes, so that the heat of the LED lamp can be conveniently dissipated, and the TFT screen is prevented from being excessively heated due to the heat of the LED lamp.

Drawings

FIG. 1 is a schematic diagram of the position structure of a lens assembly according to the present invention;

FIG. 2 is a schematic view of the light projection direction according to the present invention;

FIG. 3 is a schematic view of the overall structure of the present invention;

FIG. 4 is an enlarged view of the structure at A in FIG. 3 according to the present invention;

FIG. 5 is a schematic top view of a spirit level according to the present invention.

In the figure: 1. a base plate; 2. an LED lamp; 3. a lens assembly; 301. a mounting frame; 302. a lens body; 303. a chute; 304. a pulley; 305. a level gauge; 306. adjusting the bolt; 4. a TFT screen; 5. a shutter assembly; 501. a spring housing; 502. a corrugated expansion sleeve; 503. and (4) micro through holes.

Detailed Description

As shown in fig. 1-5, a fresnel lens for cooling and protecting a TFT includes a base plate 1, an LED lamp 2 and a lens assembly 3, the lens assembly 3 is disposed above the LED lamp 2, a TFT screen 4 is disposed above the lens assembly 3, the LED lamp 2 is disposed on the surface of the base plate 1 in a fitting manner, the lens in the lens assembly 3 is a fresnel lens, the fresnel lens is disposed between the LED lamp 2 and the TFT screen 4, the TFT screen 4 is prevented from being directly affected by heat of the LED lamp 2, and the imaging clarity is improved, the lens assembly 3 includes an installation frame 301 and a lens body 302, the lens body 302 is embedded in the installation frame 301, the lens assembly 3 further includes a chute 303, a pulley 304, a level gauge 305 and an adjusting bolt 306, the chute 303 is disposed on the surface of the installation frame 301, a pulley 304 is disposed in the chute 303, and the top of the pulley 304 is rotatably connected with the level gauge 305, adjusting bolts 306 penetrate through the edge of the installation frame 301, the adjusting bolts 306 are in threaded connection with the bottom plate 1, four adjusting bolts 306 are arranged, the lens body 302 is a Fresnel lens, light rays emitted by the LED lamp 2 can penetrate through the lens body 302 and are projected to the surface of the TFT screen 4 in parallel and uniformly, the upper surface of the level gauge 305 and the upper surface of the installation frame 301 are located on the same horizontal plane, the level gauge 305 is in sliding connection with the installation frame 301 through a pulley 304 and a sliding groove 303, the shapes of the TFT screen 4, the lens body 302 and the LED lamp 2 are consistent, and the vertical central axes of the TFT screen 4, the lens body 302 and the LED lamp 2 are coincident;

the specific operation is as follows, firstly, the LED lamp 2 is attached to and arranged on the surface of the bottom plate 1, at this time, the LED lamp 2 and the bottom plate 1 are necessarily in the same horizontal state, then the mounting frame 301 is arranged above the LED lamp 2 with the lens body 302 carried thereon, and the adjusting bolt 306 is rotated to be in threaded connection with the bottom plate 1, so that the mounting frame 301 is firmly fixed above the LED lamp 2, then the horizontal state, which is the arrangement state of the lens body 302, is determined by the observation level 305, and the level 305 is manually pushed to slide along the inside of the sliding groove 303 through the pulley 304, so that the horizontal detection can be carried out on each position of the mounting frame 301 and the lens body 302, the adjusting bolt 306 is rotated again to raise or lower the angle corresponding to the mounting frame 301 in accordance with the detection result, and at the same time, the adjusting bolt 306 is not separated from the bottom plate 1, until the detection result of the level 305 for each position is observed to be in the horizontal state, at this moment, the lens body 302 is necessarily distributed in the upper part of the LED lamp 2 in parallel, the LED lamp 2 gives off light and penetrates the lens body 302 to be necessarily parallel and uniformly projected onto the TFT screen 4, so that the light is uniformly distributed on the TFT screen 4, the improvement of the definition is facilitated, the lens body 302 is positioned between the LED lamp 2 and the TFT screen 4, the heat insulation effect is achieved, the energy can be lost when the light penetrates through the lens body 302, the TFT screen 4 can be prevented from being directly influenced by the heat of the LED lamp 2, the lens body 302 on the market is generally positioned above the TFT screen 4 nowadays, the imaging definition can be influenced, and the imaging definition is facilitated to be improved by arranging the lens body 302 between the LED lamp 2 and the TFT screen 4.

As shown in fig. 3-4, a shielding assembly 5 is arranged outside the bottom end of the adjusting bolt 306, the shielding assembly 5 includes a spring sleeve 501, a corrugated telescopic sleeve 502 and micro through holes 503, the bottom of the spring sleeve 501 is connected with the corrugated telescopic sleeve 502, the surface of the corrugated telescopic sleeve 502 is provided with the micro through holes 503, the top of the spring sleeve 501 is fixedly connected with the bottom of the mounting frame 301, the inner wall of the spring sleeve 501 is parallel to the outer wall of the adjusting bolt 306, the corrugated telescopic sleeve 502 is in a structure like a Chinese character 'kou', and the micro through holes 503 are uniformly distributed on the surface of the corrugated telescopic sleeve 502;

the specific operation is as follows, installation frame 301 four corners position risees or reduces because of adjusting bolt 306's rotation, elasticity through spring housing 501 makes corrugated expansion sleeve 502 extend or shrink thereupon this moment, and keep corrugated expansion sleeve 502's bottom paste all the time in bottom plate 1 surface and wrap up in LED lamp 2 periphery, make external dust impurity unable entering, miniature through-hole 503 has evenly been seted up on corrugated expansion sleeve 502 surface simultaneously, so that the air current flows, thereby make things convenient for the heat of LED lamp 2 to loose, make LED lamp 2 temperature reduce, thereby indirectly reduce the heat that TFT screen 4 receives, avoid TFT screen 4 to be overheated because of the heat of LED lamp 2.

To sum up, when the fresnel lens with the TFT cooling protection function is used, firstly, the LED lamp 2 is attached to the surface of the bottom plate 1, and at this time, the LED lamp 2 and the bottom plate 1 are necessarily in the same horizontal state, and then the mounting frame 301 with the lens body 302 is placed above the LED lamp 2, and the adjusting bolt 306 is rotated to connect the mounting frame 301 with the bottom plate 1 through the thread, so that the mounting frame 301 is fixed above the LED lamp 2;

then, the arrangement state, namely the horizontal state, of the lens body 302 is determined by observing the level meter 305, the level meter 305 is manually pushed to slide along the inside of the sliding groove 303 through the pulley 304, the horizontal detection can be performed on the mounting frame 301 and the lens body 302, the adjusting bolt 306 is rotated again to enable the mounting frame 301 to carry a corresponding angle to be raised or lowered in cooperation with the detection result, meanwhile, the adjusting bolt 306 and the bottom plate 1 are not separated until the detection result of the level meter 305 aiming at each position is observed to be the horizontal state, and at the moment, the lens body 302 is necessarily distributed above the LED lamp 2 in parallel;

the light emitted by the LED lamp 2 is projected onto the TFT screen 4 in parallel and uniformly after passing through the lens body 302, so that the light is uniformly distributed on the TFT screen 4, the definition is improved, and the lens body 302 is positioned between the LED lamp 2 and the TFT screen 4, so that the heat insulation effect is achieved, and the TFT screen 4 is prevented from being directly influenced by the heat of the LED lamp 2;

when the position of installation frame 301 four corners risees or reduces because of adjusting bolt 306's rotation, elasticity through spring housing 501 makes flexible cover 502 of ripple extend or shrink thereupon, and keep flexible cover 502 of ripple bottom paste all the time in bottom plate 1 surface and wrap up in LED lamp 2 periphery, make the unable entering of external dust impurity, miniature through-hole 503 has evenly been seted up on flexible cover 502 surface of ripple simultaneously, so that the air current flows, thereby make things convenient for the heat of LED lamp 2 to shed, make 2 temperature reductions of LED lamp, thereby indirectly reduce the heat that TFT screen 4 receives, avoid TFT screen 4 to be overheated because of the heat of LED lamp 2.

Claims

1. The utility model provides a fresnel lens who plays cooling protection to TFT, includes bottom plate (1), LED lamp (2) and lens subassembly (3), its characterized in that: the LED lamp is characterized in that a lens assembly (3) is arranged above the LED lamp (2), a TFT screen (4) is arranged above the lens assembly (3), the lens assembly (3) comprises an installation frame (301) and a lens body (302), the lens body (302) is embedded into the installation frame (301), the lens assembly (3) further comprises a sliding groove (303), a pulley (304), a level gauge (305) and an adjusting bolt (306), the sliding groove (303) is formed in the surface of the installation frame (301), the pulley (304) is arranged inside the sliding groove (303), the level gauge (305) is rotatably connected to the top of the pulley (304), the adjusting bolt (306) penetrates through the edge of the installation frame (301), the adjusting bolt (306) is in threaded connection with the base plate (1), the adjusting bolts (306) are four, and the lens body (302) is a Fresnel lens, the upper surface of spirit level (305) and the upper surface of installation frame (301) are located same horizontal plane, and spirit level (305) pass through pulley (304), spout (303) and installation frame (301) sliding connection, the bottom outside of adjusting bolt (306) is provided with shields subassembly (5), shield subassembly (5) including spring housing (501), flexible cover of ripple (502) and miniature through-hole (503), the flexible cover of ripple (502) is connected to the bottom of spring housing (501), and miniature through-hole (503) have been seted up on the surface of flexible cover of ripple (502).

2. The fresnel lens for protecting TFT from temperature drop according to claim 1, wherein the lens in the lens assembly (3) is a fresnel lens.

3. The Fresnel lens for protecting the TFT from being cooled according to claim 2, wherein the Fresnel lens is located between the LED lamp (2) and the TFT screen (4), and has the functions of preventing the TFT screen (4) from being directly affected by the heat of the LED lamp (2) and improving the imaging definition.

4. The Fresnel lens for protecting the TFT from being cooled according to claim 1, wherein the light emitted by the LED lamp (2) passes through the lens body (302) and is projected to the surface of the TFT screen (4) in a parallel and uniform manner.

5. The Fresnel lens capable of cooling and protecting the TFT according to claim 1, wherein the TFT screen (4), the lens body (302) and the LED lamp (2) are identical in shape, and vertical central axes of the TFT screen (4), the lens body (302) and the LED lamp (2) are coincident.

6. The Fresnel lens for protecting the TFT in a cooling mode according to claim 1, wherein the top of the spring sleeve (501) is fixedly connected with the bottom of the mounting frame (301), and the inner wall of the spring sleeve (501) is parallel to the outer wall of the adjusting bolt (306).

7. The Fresnel lens for protecting the TFT in a cooling manner according to claim 1, wherein the corrugated expansion sleeve (502) has a square-shaped structure, and the micro through holes (503) are uniformly distributed on the surface of the corrugated expansion sleeve (502).