LED brightness grading device based on projection light path structure
By designing the LED brightness grading device with the projection optical path structure, the classification difficulties caused by LED brightness differences are solved, real-time brightness grading of LED patches and the stability of the light screen are achieved, and the installation needs of different projection optical machines are adapted.
Patent Information
- Application Number
- CN202422540626.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-10-21
AI Technical Summary
When LEDs are used as light sources in existing projectors, there are obvious differences in brightness between LEDs of the same model and brightness group, making it difficult to accurately classify.
A LED brightness grading device based on the projection optical path structure is designed, including a first bottom plate, a second bottom plate, a side plate, a projection optical machine, a light screen, a light source module, a light collection and collimation module, a light uniform module, a relay module and a modulator module, a real-time replacement and fixation of the LED patch are achieved through the coordination of the screw and the pressure plate, and the real-time brightness grading process is performed using an illuminator, and the light screen is prevented from shaking through the static friction between the nut and the side plate, and the distance between the crossbar and the limited sleeve is adjusted to adapt to different projection optical machines.
It realizes accurate grading of LED patches and real-time brightness adjustment, adapts to the installation needs of different projection optical machines, avoids shaking of the light screen during the detection process, and improves the accuracy and stability of brightness grading.
Smart Images
Figure CN223179642U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of projection detection, and in particular relates to an LED brightness grading device based on a projection light path structure. Background Art
[0002] The projection lighting module is a crucial component of projection products. Its function is to transform as much of the wide-angle, irregular, and unevenly bright illumination light from the light source as possible into a uniform spot that illuminates the active area of the display chip, thereby producing a uniform, bright projection image.
[0003] For projectors using LEDs as their light source, significant differences in light source brightness exist between LEDs of the same model and brightness group. Even with the same configuration, this brightness difference can reach 200 to 400 mm, making it challenging to accurately classify LEDs based on their brightness performance. Utility Model Content
[0004] In view of the above problems, the present invention provides an LED brightness grading device based on a projection light path structure to solve the problems raised in the above background technology.
[0005] To achieve the above objectives, the present invention provides the following technical solutions:
[0006] An LED brightness grading device based on a projection optical path structure includes a first base plate and a second base plate. Two side plates are provided on the top of the first base plate and the second base plate. A projection light engine is provided on the top of the second base plate, and a light screen is provided on the top of the first base plate. A projection module is provided on one side of the projection light engine, and a light source module is provided on the other side of the projection light engine. LED patches are plugged into the light source module, and a light collecting and collimating module, a light homogenizing module, a relay module and a modulator module are provided between the light source module and the projection module.
[0007] Furthermore, the light screen is located between two side panels, and rotating plates are fixed on both sides of the light screen. The outer sides of the rotating plates are fixed with insertion rods that pass through the center of the side panels. The outer ends of the insertion rods are spirally sleeved with nuts, and the inner sides of the nuts are in contact with the outer sides of the side panels.
[0008] Furthermore, a card frame is provided between the two rotating plates, and the card frame is made of rubber material.
[0009] Furthermore, a cross bar penetrating the second bottom plate is fixed to the side surface of the first bottom plate, and limiting sleeves are provided on both sides of the second bottom plate, and the limiting sleeves are spirally sleeved on the surface of the cross bar.
[0010] Furthermore, the number of the cross bars is set to two, the two cross bars are arranged relatively parallel, and the center lines of the two cross bars are in the same horizontal plane, and the first bottom plate is flush with the second bottom plate.
[0011] Further, a screw rod is spirally inserted into the top end of the light source module, a pressing plate is fixed to the bottom end of the screw rod, and the spiral fit between the screw rod and the light source module enables the pressing plate to approach or move away from the LED patch.
[0012] Further, the modulator module corresponds to the light screen, and the modulator module is located on top of the relay module.
[0013] Technical effects and advantages of the present utility model:
[0014] 1. By the cooperation of the screw rod and the pressing plate, the present utility model facilitates the real-time replacement of different LED patches into the light source module. The projection optical machine projects the light source through the projection module onto the top surface of the light screen according to the LED patch, and performs real-time brightness grading processing on different LED patches based on the illuminance received by the light screen, accurately grading the LED patches.
[0015] 2. By the cooperation of the limiting sleeve and the cross bar with the second bottom plate, the present utility model facilitates the real-time adjustment of the relative distance between the first bottom plate and the second bottom plate, and is convenient for adapting to different projection optical machines.
[0016] 3. By the static friction force between the nut and the side plate, the present utility model limits the light screen between the two rotating plates, avoiding the situation of shaking of the light screen during the detection process. Description of the drawings
[0017] Figure 1 is the overall schematic diagram of the LED brightness grading device based on the projection optical path structure in the embodiment of the present utility model;
[0018] Figure 2 is the schematic diagram of the internal components of the projection optical machine in the embodiment of the present utility model;
[0019] Figure 3 is the schematic diagram of the components on the top of the first bottom plate in the embodiment of the present utility model;
[0020] In the figure: 1. First bottom plate; 2. Second bottom plate; 3. Side plate; 4. Projection optical machine; 5. Light screen; 6. Projection module; 7. Light source module; 8. LED patch; 9. Light collection and collimation module; 10. Light homogenization module; 11. Relay module; 12. Modulator module; 13. Rotating plate; 14. Insert rod; 15. Nut; 16. Card frame; 17. Cross bar; 18. Limiting sleeve; 19. Screw rod; 20. Pressing plate. Detailed implementation manners
[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments.
[0022] The utility model provides an LED brightness grading device based on a projection optical path structure, as Figure 1 and Figure 2 shown, which includes a first bottom plate 1 and a second bottom plate 2. Two side plates 3 are arranged on the tops of the first bottom plate 1 and the second bottom plate 2. A projection optical machine 4 is arranged on the top of the second bottom plate 2. A light screen 5 is arranged on the top of the first bottom plate 1. A projection module 6 is arranged on one side of the projection optical machine 4. A light source module 7 is arranged on the other side of the projection optical machine 4. An LED patch 8 is inserted into the light source module 7. A light collecting and collimating module 9, a light homogenizing module 10, a relay module 11 and a modulator module 12 are arranged between the light source module 7 and the projection module 6. The LED patch 8 is correspondingly inserted into the light source module 7. The light source module 7 is started. The light source module 7 passes the light source through the light collecting and collimating module 9, the light homogenizing module 10, the relay module 11 and the modulator module 12 in sequence according to the LED patch 8 and then enters the projection module 6. The output end of the projection module 6 corresponds to the light screen 5. The projection module 6 projects the light source on the top surface of the light screen 5. The light screen 5 is replaced by an illuminometer or other detectors in a plug-in manner and installed inside the card frame 16. The illuminometer or other detectors are used to detect the illuminance of the light source projected by the projection module 6. Record the illuminance at this time. The LED patch 8 is taken off, and different LED patches 8 are inserted into the light source module 7 in sequence. The different LED patches 8 are subjected to real-time brightness grading processing according to the recorded illuminance.
[0023] In Figure 1 and Figure 3 , the light screen 5 is located between the two side plates 3. Rotating plates 13 are fixed on both side surfaces of the light screen 5. Plug rods 14 penetrating through the centers of the side plates 3 are fixed on the outer side surfaces of the rotating plates 13. A nut 15 is spirally sleeved on the outer side end of the plug rod 14. The inner side surface of the nut 15 is attached to the outer side surface of the side plate 3. Loosen the nut 15 and rotate the light screen 5. The light screen 5 drives the rotating plates 13 to rotate. The rotating rotating plates 13 rotate on the top of the first bottom plate 1 by using the plug rods 14, which is convenient for real-time adjustment of the adjustable pitching angle of the light screen 5. Until the pitching angle of the light screen 5 is adjusted, tighten the nut 15 until the inner side surface of the nut 15 is tightly attached to the outer side surface of the side plate 3. The light screen 5 between the two rotating plates 13 is limited by the static friction force between the nut 15 and the side plate 3, so as to avoid the light screen 5 shaking during the detection process.
[0024] In Figure 1 , a card frame 16 is arranged between the two rotating plates 13. The card frame 16 is made of rubber material. Different types of illuminometers or other detectors can be installed inside the card frame 16 in a plug-in manner, and the illuminometers or other detectors are used to detect the illuminance of the light source projected by the projection module 6.
[0025] In Figure 1In it, a cross bar 17 penetrating through the second base plate 2 is fixed to the side surface of the first base plate 1. Limiting sleeves 18 are arranged on both sides of the second base plate 2, and the limiting sleeves 18 are spirally sleeved on the surface of the cross bar 17. The number of the cross bars 17 is set to two, and the two cross bars 17 are arranged relatively parallel, and the center lines of the two cross bars 17 are in the same horizontal plane, and the first base plate 1 and the second base plate 2 are correspondingly flush. By screwing the limiting sleeve 18, the spiral effect between the limiting sleeve 18 and the cross bar 17 enables the limiting sleeve 18 to move on the surface of the cross bar 17. At this time, the limiting sleeves 18 on both sides of the second base plate 2 move away from each other, pushing the second base plate 2 to move. The second base plate 2 moves on the surface of the two cross bars 17. By means of the two cross bars 17, the second base plate 2 is prevented from rotating on the surface of the cross bar 17. Until the second base plate 2 moves to the appropriate position, then reversely screw the limiting sleeves 18 on both sides of the second base plate 2, and the limiting sleeves 18 on both sides of the second base plate 2 approach each other. Through the cooperation of the limiting sleeve 18 and the cross bar 17 with the second base plate 2, it is convenient to adjust the relative distance between the first base plate 1 and the second base plate 2 in real time, and it is convenient to adapt to different projection optical machines 4.
[0026] In Figure 1 and Figure 2 In it, a screw rod 19 is spirally inserted into the top end of the light source module 7. A pressing plate 20 is fixed to the bottom end of the screw rod 19, and the spiral cooperation between the screw rod 19 and the light source module 7 enables the pressing plate 20 to approach or move away from the LED patch 8. After the LED patch 8 is correspondingly inserted into the light source module 7, screw the screw rod 19. The spiral cooperation between the screw rod 19 and the light source module 7 enables the pressing plate 20 to approach the LED patch 8. By means of the extrusion of the pressing plate 20, the LED patch 8 is fixed inside the light source module 7, preventing the LED patch 8 from swaying wantonly inside the projection optical machine 4. At the same time, the spiral cooperation between the screw rod 19 and the light source module 7 facilitates the real-time replacement of the LED patch 8.
[0027] In Figure 2 In it, the modulator module 12 corresponds to the light screen 5, and the modulator module 12 is located on the top of the relay module 11. When the light source passing through the relay module 11 irradiates on the surface of the modulator module 12, rotate the modulator module 12, and by rotating, the Scheimpflug angle of the modulator module 12 is changed. The light source reflected by the modulator module 12 enters the projection module 6. The output end of the projection module 6 corresponds to the light screen 5. The projection module 6 projects the light source onto the top surface of the light screen 5, and the pitching angle of the light screen 5 can be adjusted in real time so as to correspond to the Scheimpflug angle of the modulator module 12.
[0028] The working principle of the present utility model:
[0029] Referring to Figures 1 to 3As shown, turn the limiting sleeve 18. The screw effect between the limiting sleeve 18 and the cross bar 17 causes the limiting sleeve 18 to move on the surface of the cross bar 17. At this time, the limiting sleeves 18 on both sides of the second base plate 2 move away from each other, pushing the second base plate 2 to move. The second base plate 2 moves on the surfaces of the two cross bars 17. The two cross bars 17 prevent the second base plate 2 from rotating on the surface of the cross bar 17. Until the second base plate 2 moves to the appropriate position, reverse-turn the limiting sleeves 18 on both sides of the second base plate 2. The limiting sleeves 18 on both sides of the second base plate 2 move closer to each other. The limiting sleeve 18 and the cross bar 17 cooperate with the second base plate 2 to facilitate the real-time adjustment of the relative distance between the first base plate 1 and the second base plate 2, and facilitate the adaptation to different projection light machines 4.
[0030] After the LED patch 8 is correspondingly inserted into the light source module 7, turn the screw 19. The screw fit between the screw 19 and the light source module 7 causes the pressing plate 20 to approach the LED patch 8. The LED patch 8 is fixed inside the light source module 7 by the extrusion of the pressing plate 20. Start the light source module 7. The light source module 7 passes the light source through the light collecting and collimating module 9, the light homogenizing module 10, the relay module 11, and the modulator module 12 in sequence according to the LED patch 8 and then enters the projection module 6. The output end of the projection module 6 corresponds to the light screen 5. The projection module 6 projects the light source on the top surface of the light screen 5. Replace the light screen 5 with an illuminometer or other detectors by plugging them inside the card frame 16. Use the illuminometer or other detectors to detect the illuminance of the light source projected by the projection module 6. Record the illuminance at this time. By the cooperation of the screw 19 and the pressing plate 20, different LED patches 8 are inserted into the light source module 7 in sequence. Real-time brightness grading processing is performed on different LED patches 8 according to the recorded illuminance.
[0031] When the light source passing through the relay module 11 irradiates on the surface of the modulator module 12, turn the modulator module 12. By turning, the Scheimpflug angle of the modulator module 12 is changed. The light source reflected by the modulator module 12 enters the projection module 6. The output end of the projection module 6 corresponds to the light screen 5. The projection module 6 projects the light source on the top surface of the light screen 5. Loosen the nut 15 and turn the light screen 5. The light screen 5 drives the rotating plate 13 to rotate. The rotating rotating plate 13 rotates on the top of the first base plate 1 by means of the insertion rod 14, which facilitates the real-time adjustment of the adjustable pitching angle of the light screen 5. Until the pitching angle of the light screen 5 is adjusted, tighten the nut 15 until the inner side surface of the nut 15 is closely attached to the outer side surface of the side plate 3. The light screen 5 between the two rotating plates 13 is limited by the static friction force between the nut 15 and the side plate 3, and the pitching angle of the light screen 5 can be adjusted in real time to correspond to the Scheimpflug angle of the modulator module 12.
[0032] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it.
Claims
1. An LED brightness grading device based on a projection optical path structure, characterized in that: It includes a first bottom plate (1) and a second bottom plate (2). Two side plates (3) are provided at the top of the first bottom plate (1) and the second bottom plate (2). A projection optical machine (4) is provided at the top of the second bottom plate (2), and a light screen (5) is provided at the top of the first bottom plate (1). A projection module (6) is provided on one side of the projection optical machine (4), and a light source module (7) is provided on the other side of the projection optical machine (4). An LED patch (8) is inserted into the light source module (7). A light collection and collimation module (9), a light homogenization module (10), a relay module (11) and a modulator module (12) are provided between the light source module (7) and the projection module (6).
2. The LED brightness grading device based on the projection optical path structure according to claim 1, characterized in that: The light screen (5) is between the two side plates (3). Rotating plates (13) are fixed on both side surfaces of the light screen (5). Insertion rods (14) passing through the centers of the side plates (3) are fixed on the outer side surfaces of the rotating plates (13). A nut (15) is spirally sleeved on the outer side end of the insertion rod (14), and the inner side surface of the nut (15) is in contact with the outer side surface of the side plate (3).
3. The LED brightness grading device based on the projection optical path structure according to claim 2, wherein: A clamping frame (16) is provided between the two rotating plates (13), and the clamping frame (16) is made of rubber material.
4. The LED brightness grading device based on the projection optical path structure according to claim 1, wherein: A cross bar (17) passing through the second bottom plate (2) is fixed on the side surface of the first bottom plate (1). Limiting sleeves (18) are provided on both sides of the second bottom plate (2), and the limiting sleeves (18) are spirally sleeved on the surface of the cross bar (17).
5. The LED brightness grading device based on the projection optical path structure according to claim 4, characterized in that: The number of the cross bars (17) is two. The two cross bars (17) are arranged relatively parallel, and the center lines of the two cross bars (17) are in the same horizontal plane, and the first bottom plate (1) and the second bottom plate (2) are correspondingly flush.
6. The LED brightness grading device based on the projection optical path structure according to claim 1, wherein: A screw rod (19) is spirally inserted into the top end of the light source module (7). A pressing plate (20) is fixed at the bottom end of the screw rod (19), and the spiral fit between the screw rod (19) and the light source module (7) enables the pressing plate (20) to approach or move away from the LED patch (8).
7. The LED brightness grading device based on the projection optical path structure according to claim 1, characterized in that: The modulator module (12) corresponds to the light screen (5), and the modulator module (12) is at the top of the relay module (11).