A dynamic light guide louver system that prevents glare and provides a field of view

Abstract

The application discloses a dynamic light guide louver system capable of preventing glare and providing a visual field, and relates to the field of building lighting and shading. A specific embodiment of the system comprises a sunlight redirection louver structure, the structure comprising a louver, the louver comprising a prism plate, a first diffuse transmission plate and a second diffuse transmission plate; the first diffuse transmission plate is aligned with the top of the prism plate and extends inward from the top of the prism plate to form a first fixed included angle; the second diffuse transmission plate is aligned with the bottom of the prism plate and extends outward from the bottom of the prism plate to form a second fixed included angle; each louver in the structure is controlled to rotate automatically and synchronously when the solar altitude angle range changes, so that each prism plate is at an inclination angle corresponding to the altitude angle range, so that the incident angle of sunlight at the prism film is within the preferred redirection angle range of the prism film at all times. The embodiment can reduce glare. Meanwhile, the system can still provide good indoor lighting and avoid glare when the louver blades are fully closed due to excessive outdoor light.

Description

Technical Field

[0001] This invention relates to the field of building lighting and shading, and more particularly to a dynamic light-guiding louver system that provides both glare reduction and visibility. Background Technology

[0002] Current venetian blind structures cannot redirect sunlight, i.e., adjust downward-incident light to upward-incident light, resulting in severe glare; at the same time, gaps between the slats cause light leakage, further aggravating glare; in addition, existing venetian blind structures do not provide a good outdoor view. Summary of the Invention

[0003] In view of this, embodiments of the present invention provide a dynamic light-guiding louver system that provides both anti-glare and a field of vision. The system achieves sunlight redirection based on a louver structure with a prism film. By automatically adapting and rotating the louvers to follow the sun's altitude angle, the sunlight incident at the prism film is within the preferred redirection angle range of the prism film at all times, thereby achieving good sunlight redirection performance. Furthermore, by setting two diffuser plates on each louver, the system achieves all-time light blocking, further reducing glare.

[0004] To achieve the above objectives, the present invention provides a dynamic light guide louver system that provides both glare reduction and a clear field of vision.

[0005] The dynamic light-guiding louver system for anti-glare and providing a field of view according to an embodiment of the present invention includes: a daylight redirection louver structure; the daylight redirection louver structure includes: a plurality of laterally extending and parallel blades, each blade including: a prism plate, a first diffuse transmission plate fixed to the top of the prism plate, and a second diffuse transmission plate fixed to the bottom of the prism plate; the prism plate includes: a light-transmitting substrate and a prism film attached to the substrate; the first diffuse transmission plate is aligned with the top of the prism plate and extends inward from the top of the prism plate, forming a first fixed angle between the first diffuse transmission plate and the prism plate; the second... The diffuse transmission plate is aligned with the bottom of the prism plate and extends outward from the bottom of the prism plate to form a second fixed angle between the second diffuse transmission plate and the prism plate; the first fixed angle and the second fixed angle are obtuse angles; each blade in the solar redirection louver structure is automatically and synchronously rotated in a controlled manner when the current solar altitude angle changes, so that the prism plate in each blade is at a preset tilt angle corresponding to the current solar altitude angle, so that the incident angle of sunlight on the prism film is within the preset preferred redirection angle range of the prism film throughout the day.

[0006] Optionally, the tilt angle of the prism plate is the angle from the vertical plane to the prism plate, and the maximum value of the tilt angle is 30 degrees.

[0007] Optionally, when the rotation direction from the vertical plane to the prism plate via the shortest path is counterclockwise, the angle value of the tilt angle is negative; when the rotation direction from the vertical plane to the prism plate via the shortest path is clockwise, the angle value of the tilt angle is positive; and the height angle range includes: a first height angle range, a second height angle range, a third height angle range, and a fourth height angle range, with the angles increasing sequentially and not overlapping; the first height angle range corresponds to the first tilt angle of the prism plate, the second height angle range corresponds to the second tilt angle of the prism plate, the third height angle range corresponds to the third tilt angle of the prism plate, and the fourth height angle range corresponds to the fourth tilt angle of the prism plate; the first tilt angle, the second tilt angle, the third tilt angle, and the fourth tilt angle increase sequentially, the angle values ​​of the first tilt angle and the second tilt angle are negative, the angle value of the third tilt angle is zero, and the angle value of the fourth tilt angle is positive.

[0008] Optionally, the lower limit of the preferred redirection angle range of the prism film is between 10 degrees and 30 degrees, and the upper limit is between 60 degrees and 80 degrees.

[0009] Optionally, the first fixed angle is equal to the second fixed angle, and the angle value is between 100 degrees and 170 degrees.

[0010] Optionally, when the prism plates in each blade are at a first tilt angle, in two adjacent blades, the second diffuser plate of the upper blade contacts the first diffuser plate of the lower blade; when the prism plates in each blade are at a second tilt angle, in two adjacent blades, a gap is formed between the second diffuser plate of the upper blade and the first diffuser plate of the lower blade, and sunlight incident into the gap is blocked by the second diffuser plate of the upper blade or the first diffuser plate of the lower blade; when the prism plates in each blade are at a third tilt angle or a fourth tilt angle, in two adjacent blades, a gap is formed between the second diffuser plate of the upper blade and the first diffuser plate of the lower blade, and sunlight incident into the gap is blocked by the second diffuser plate of the upper blade or the prism plate.

[0011] Optionally, the prism plate, the first diffuse transmission plate, and the second diffuse transmission plate are rectangular planar plates, the first diffuse transmission plate and the second diffuse transmission plate are identical in shape, and the lengths of the first diffuse transmission plate and the second diffuse transmission plate are equal to the length of the prism plate; the blades in the daylight redirection louver structure are arranged at equal intervals.

[0012] Optionally, the first and second diffuse transmission plates are made of isotropic diffuse translucent materials, and the substrate is made of transparent materials.

[0013] Optionally, the system further includes: a perforated louver structure located below the daylight redirection louver structure; wherein the perforated louver structure includes a plurality of louver blades, each louver blade including: a perforated plate made of an opaque or translucent material, wherein the perforated plate of each louver blade has a plurality of uniformly distributed through holes to provide a field of view.

[0014] Optionally, the louver further includes: a third diffuse transmission plate fixed to the top of the perforated plate and a fourth diffuse transmission plate fixed to the bottom of the perforated plate; wherein the third diffuse transmission plate is aligned with the top of the perforated plate and extends inward from the top of the perforated plate to form a third fixed angle between the third diffuse transmission plate and the perforated plate; the fourth diffuse transmission plate is aligned with the bottom of the perforated plate and extends outward from the bottom of the perforated plate to form a fourth fixed angle between the fourth diffuse transmission plate and the perforated plate; the third fixed angle and the fourth fixed angle are obtuse angles.

[0015] Optionally, the third fixed angle is equal to the fourth fixed angle, with an angle value between 100 degrees and 170 degrees; the perforated plate, the third diffuse transmission plate, and the fourth diffuse transmission plate are rectangular planar plates, the third diffuse transmission plate and the fourth diffuse transmission plate are identical in shape, and the length of the third diffuse transmission plate and the fourth diffuse transmission plate is equal to the length of the perforated plate; the third diffuse transmission plate and the fourth diffuse transmission plate are made of isotropic diffuse translucent material and have multiple uniformly distributed through holes; the louvers in the perforated louver structure are arranged at equal intervals.

[0016] Optionally, the system further includes: a control unit and a power unit; the control unit determines the current solar altitude angle based on the current latitude and longitude and the current time, and issues a blade rotation command to the power unit when it determines that the altitude angle range of the current solar altitude angle has changed; the power unit responds to the received blade rotation command by rotating each blade in the solar redirection louver structure so that the prism plate in each blade is at an angle corresponding to the altitude angle range of the current solar altitude angle.

[0017] Optionally, the system further includes: a solar radiation monitoring unit for collecting solar radiation data and sending it to the controller; when the control unit determines that the current solar radiation data has increased to a preset threshold, it issues a louver deployment command to the power unit to deploy the solar redirection louver structure and the perforated louver structure; when the control unit determines that the current solar radiation data has decreased to the threshold, it issues a louver retraction command to the power unit to retract the solar redirection louver structure and the perforated louver structure.

[0018] According to the technical solution of the present invention, the embodiments described above have the following advantages or beneficial effects:

[0019] The daylight redirection function is achieved by using a prism plate, comprising a substrate and a prism film, as the main body of each blade. Each blade rotates automatically and synchronously in a controlled manner as the current solar altitude angle changes, positioning the prism plate in each blade at an angle corresponding to the current solar altitude angle. This ensures that the incident angle of sunlight onto the prism film is within its optimal redirection angle range throughout the day, achieving excellent daylight redirection performance to reduce glare. The abundant upward-facing rays emitted can penetrate deep into the interior space through the high-reflectivity ceiling and roof, thereby increasing the natural lighting area and improving sunlight utilization. The blade rotation employs a phased rotation method, with one rotation corresponding to one altitude angle range, and the rotation amplitude controlled within a small range (e.g., within 30 degrees) to prevent frequent rotation from affecting occupants and light leakage caused by large-angle rotation.

[0020] In addition, a first diffuser plate and a second diffuser plate are respectively set at the top and bottom of the prism plate of each blade. The former is aligned with the top of the prism plate and extends inward from the top of the prism plate to form a first fixed angle between the first diffuser plate and the prism plate; the latter is aligned with the bottom of the prism plate and extends outward from the bottom of the prism plate to form a second fixed angle between the second diffuser plate and the prism plate. The first and second fixed angles can be obtuse angles between 100 degrees and 170 degrees. The specific structure of the diffuser plate combined with the small-angle rotation of the prism plate can prevent light leakage at all times. In most cases (e.g., when the prism plate is at the second, third, or fourth tilt angle), the sunlight is blocked from the incident gap by the cooperation between adjacent diffuser plates, even when there is a gap between the blades. The gap can optimize the connectivity between the interior and exterior spaces without causing glare or light leakage, and provide a certain degree of external view to people inside the room. It also facilitates the subsequent rotation of the blades and prism plates and prevents the diffuser plates of adjacent blades from colliding and affecting the controlled rotation.

[0021] In addition, embodiments of the present invention may include a perforated louver structure below the sun-redirecting louver structure composed of the above-mentioned blades. The perforated plate of the perforated louver structure is made of opaque material and has multiple through holes evenly distributed on it, connecting the inner and outer spaces. This can prevent glare caused by light rays emanating from below and further improve the field of vision. A translucent, inverted Z-shaped diffuser plate can also be installed at the top and bottom of the perforated plate to reduce or eliminate glare.

[0022] The further effects of the aforementioned unconventional alternative methods will be explained below in conjunction with specific implementation methods. Attached Figure Description

[0023] The accompanying drawings are provided to better understand the invention and are not intended to unduly limit the scope of the invention. Wherein:

[0024] Figure 1This is a schematic diagram of the structure of the dynamic light guide louver system that provides anti-glare and a field of view in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the blade structure according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the prism film structure according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of sunlight incidence and blade rotation according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of blade rotation and light leakage prevention in an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram illustrating the derivation of the parameter constraint formula in an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the control principle of the dynamic light guide louver system that provides anti-glare and visual field in an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram illustrating the sunlight redirection effect according to an embodiment of the present invention;

[0032] Explanation of reference numerals in the attached figures:

[0033] 10: Sunlight redirection louver structure; 11: Blade; 12: Prism plate; 13: First diffuse transmission plate; 14: Second diffuse transmission plate; 15: Substrate; 16: Prism film; 17: Optical substrate; 18: Microprism structure; 20: Perforated louver structure; 21: Blade; 22: Perforated plate; 23: Third diffuse transmission plate; 24: Fourth diffuse transmission plate; 25: Through hole; 30: Control unit; 40: Power unit; 50: Solar radiation monitoring unit. Detailed Implementation

[0034] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of the present invention, including various details to aid understanding. These details should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the invention. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0035] It should be noted that the terms "set", "install", and "connect" in the following description can refer to a fixed fit between two objects or a non-fixed fit (such as a sliding connection); they can refer to a detachable fit (such as a bolt and nut connection) or a non-detachable fit (such as welding); they can refer to a direct fit or an indirect fit mediated by a third object.

[0036] In the description of this invention, unless otherwise expressly defined, "above" or "below" a second target can include direct contact between the first and second targets, or contact between the first and second targets through another target between them. "Above," "on top of," and "over" a second target includes the first target being directly above or diagonally above the second target, or simply indicates that the height of the first target is greater than that of the second target. "Below," "below," and "under" a second target includes the first target being directly below or diagonally below the second target, or simply indicates that the height of the first target is less than that of the second target. The terms "above," "below," "left," "right," etc., of orientation or positional relationship can be based on the orientation or position shown in the drawings, or on a defined specific direction and position. These terms are for ease of description and do not indicate or imply that the device or element referred to must have a specific orientation or must be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0037] Furthermore, the following descriptions of direction and orientation correspond to actual use scenarios of dynamic light-guiding louver systems (hereinafter referred to as light-guiding louver systems) that provide anti-glare and visibility, such as installing the light-guiding louver system at a window location to redirect sunlight. Additionally, the terms "first" and "second" are used only for descriptive distinction and have no specific meaning. Where there is no conflict, embodiments of the present invention and the technical features within them can be combined with each other.

[0038] Figure 1 This is a schematic diagram of the light guide louver system in an embodiment of the present invention. Figure 1 As shown, the light-guiding louver system of this embodiment may include: a daylight redirection louver structure 10, which may include: a plurality of laterally extending and parallel blades 11. The term "laterally extending" refers to extension in the horizontal direction. In practical applications, each blade 11 in the daylight redirection louver structure 10 can be controlled to rotate synchronously and remain parallel, and the spacing between the blades 11 may be equal or unequal. More preferably, the blades 11 in the daylight redirection louver structure 10 are arranged at equal intervals. In specific applications, each blade 11 in the daylight redirection louver structure 10 can be controlled to retract and expand.

[0039] The blade 11 mentioned above may include: a prism plate 12, a first diffuse transmission plate 13 fixed to the top of the prism plate 12, and a second diffuse transmission plate 14 fixed to the bottom of the prism plate 12. See [reference needed] Figure 2 As a preferred embodiment, the prism plate 12, the first diffuse transmission plate 13, and the second diffuse transmission plate 14 are rectangular planar plates, the first diffuse transmission plate 13 and the second diffuse transmission plate 14 are identical in shape, and the lengths of the first diffuse transmission plate 13 and the second diffuse transmission plate 14 are equal to the length of the prism plate 12.

[0040] The prism plate 12 described above may include: a light-transmitting substrate 15 and a prism film 16 attached to the substrate 15. Light transmittance means that the transmittance corresponding to a specific wavelength (e.g., 560 nm) is greater than a preset first transmittance threshold (e.g., 30%). More preferably, the substrate 15 may be made of a transparent material (e.g., glass). In embodiments of the present invention, transparent materials, translucent materials, and opaque materials can be distinguished and quantified by the transmittance of the materials. For example, a transparent material has a transmittance corresponding to a specific wavelength of light greater than a preset second transmittance threshold (e.g., 70%), a translucent material has a transmittance corresponding to a specific wavelength of light greater than the first transmittance threshold (e.g., 30%) and less than or equal to the second transmittance threshold (e.g., 70%), and an opaque material has a transmittance corresponding to a specific wavelength of light less than or equal to the first transmittance threshold (e.g., 30%). The prism film 16 refers to an optical film containing a microprism structure and having a light redirection function (i.e., capable of adjusting a certain proportion of downward-incident light to upward light), see [link to relevant documentation]. Figure 3 The prism film 16 may include an optical substrate 17 and a microprism structure 18. The microprism structure 18 includes a plurality of periodically arranged prisms of the same shape, and each prism may include at least two planes joined in sequence. Figure 3 The diagram illustrates a prism comprising three planes. In practical applications, the microprism structure 18 can be positioned near the outdoor space, allowing sunlight to first strike the microprism structure 18 before entering the optical substrate 17, thus reducing dispersion. Alternatively, the optical substrate 17 can also be positioned near the outdoor space, providing light redirection capabilities. In specific applications, the substrate 15 can be one or more layers, and the attachment method can be various suitable connection methods, such as bonding a single layer of substrate 15 to which the prism film 16 is bonded, or attaching the prism film 16 between two layers of substrate 15.

[0041] The first diffuser plate 13 and the second diffuser plate 14 can be made of translucent materials such as frosted glass or specific types of resin. The first diffuser plate 13 and the second diffuser plate 14 exhibit diffuse transmission properties, meaning that light scatters in all directions when passing through them. More preferably, the first diffuser plate 13 and the second diffuser plate 14 are made of isotropic diffuse translucent materials. In this case, light passing through the first diffuser plate 13 and the second diffuser plate 14 can be uniformly scattered in all directions of the exiting hemispherical space, thereby reducing or avoiding glare through light-averaging and light-reducing effects.

[0042] In practical applications, the first diffuse transmission plate 13 is aligned with the top of the prism plate 12 and extends inward from the top of the prism plate 12, forming a first fixed angle between the first diffuse transmission plate 13 and the prism plate 12; the second diffuse transmission plate 14 is aligned with the bottom of the prism plate 12 and extends outward from the bottom of the prism plate 12, forming a second fixed angle between the second diffuse transmission plate 14 and the prism plate 12. Specifically, the first and second fixed angles are obtuse angles. Regardless of whether the blade 11 is stationary or rotating, the first diffuse transmission plate 13 and the second diffuse transmission plate 14 maintain fixed first and second fixed angles with the prism plate 12, respectively.

[0043] See Figure 1 , Figure 2 , Figure 4 and Figure 5 The first diffuser plate 13, fixed to the top of the prism plate 12, shares a common edge (i.e., is aligned) with the top of the prism plate 12, extends into the interior space (i.e., indoor space) of the light-guiding louver system, and is fixed at a first fixed angle as an obtuse angle; the second diffuser plate 14, fixed to the bottom of the prism plate 12, shares a common edge with the bottom of the prism plate 12, extends into the exterior space (i.e., outdoor space) of the light-guiding louver system, and is fixed at a second fixed angle as an obtuse angle. The prism plate 12, the first diffuser plate 13, and the second diffuser plate 14 of a single blade 11 are... Figure 2 , Figure 4 and Figure 5 From a certain perspective, it forms an inverted Z-shape. This special structure, combined with the synchronous rotation of the blades 11, enables full-time (from sunrise to sunset) sunlight blocking and, in most cases, creates gaps between adjacent blades to improve connectivity between indoor and outdoor spaces. Preferably, the first fixed angle and the second fixed angle are equal, with angle values ​​between 100 and 170 degrees. Figure 2 , Figure 4 , Figure 5 and Figure 7 In the middle, both the first fixed angle and the second fixed angle are 120 degrees.

[0044] In this embodiment of the invention, each blade 11 in the solar redirection louver structure 10 is automatically and synchronously rotated under control when the current solar altitude angle changes within its altitude angle range. This causes the prism plate 12 in each blade 11 to be at a preset tilt angle corresponding to the current solar altitude angle range, ultimately ensuring that the incident angle of sunlight on the prism film 16 is within a preset, preferred redirection angle range of the prism film 16 throughout the entire time period. The solar altitude angle mentioned above refers to the angle between the sunlight at a certain location and the surface section connecting that location to the Earth's center. The following explanation uses a solar altitude angle between 0 degrees and 80 degrees throughout the entire time period as an example (both 0 degrees and 80 degrees can be obtained). 0 degrees corresponds to the terminator, and 80 degrees corresponds to noon. Specifically, multiple non-overlapping elevation angle ranges can be set first. For example, the first elevation angle range is from 0 degrees to 45 degrees (closed in the front and open in the back, so 0 degrees can be obtained but 45 degrees cannot be obtained), the second elevation angle range is from 45 degrees to 60 degrees (closed in the front and open in the back, so 45 degrees can be obtained but 60 degrees cannot be obtained), the third elevation angle range is from 60 degrees to 70 degrees (closed in the front and open in the back, so 60 degrees can be obtained but 70 degrees cannot be obtained), and the fourth elevation angle range is from 70 degrees to 80 degrees (closed in the front and closed in the back, so 70 degrees can be obtained or 80 degrees can be obtained).

[0045] Subsequently, the tilt angles corresponding to each elevation angle range are set. For example, a first tilt angle corresponding to the first elevation angle range, a second tilt angle corresponding to the second elevation angle range, a third tilt angle corresponding to the third elevation angle range, and a fourth tilt angle corresponding to the fourth elevation angle range are set. The first, second, third, and fourth tilt angles increase sequentially. The angle values ​​of the first and second tilt angles can be negative, the angle value of the third tilt angle can be zero, and the angle value of the fourth tilt angle can be positive. For example, the first, second, third, and fourth tilt angles can be set to -15 degrees, -7 degrees, zero degrees, and 7 degrees, respectively. The above tilt angles refer to the arrangement angles of the prism plate, specifically the angle from the vertical plane to the prism plate. See also... Figure 4 The sun is incident at an altitude angle β, and the prism plate is tilted at an angle α.

[0046] For example, the sign of the tilt angle value can be fixed in the following way: when the rotation direction from the vertical plane to the prism plate 12 via the shortest path is counterclockwise, the tilt angle value is negative; when the rotation direction from the vertical plane to the prism plate 12 via the shortest path is clockwise, the tilt angle value is positive. This description helps to represent the magnitude of the tilt angle in various cases. It is understood that the direction and magnitude of the tilt angle can also be represented in other applicable ways. In particular, the tilt angle value can be limited, for example, by limiting the maximum absolute value of the tilt angle value to 30 degrees, so that each blade rotates within a small range to prevent light leakage.

[0047] The incident angle mentioned above refers to the angle between the incident light and the normal plane of the optical substrate 17 of the prism film 16. Generally, the prism film 16 has difficulty achieving a large proportion of redirection for incident light with extremely small (e.g., less than 10 degrees) or extremely large (e.g., greater than 77 degrees) incident angles, thus forming a certain degree of glare. Based on the above considerations, this embodiment of the invention uses the adaptive rotation of the prism plate 12 to the solar altitude angle, so that the incident angle of sunlight on the prism film 16 is always within the preferred redirection angle range of the prism film 16 throughout the day, thereby avoiding sunlight from entering the prism film 16 at extremely small or extremely large incident angles and causing glare. The preferred redirection angle range mentioned above refers to the incident angle range in which the prism film 16 has a strong light redirection capability. Within the preferred redirection angle range, the upward emission energy ratio of the prism film 16 is greater than a preset percentage (e.g., 65%), where the upward emission energy ratio refers to the proportion of the total energy of the upward-emitted light in the total energy of all emitted light. In practical applications, the preferred redirection angle range for various prism films 16 can be determined experimentally. Generally, the lower limit of the preferred redirection angle range is between 10 and 30 degrees, and the upper limit is between 60 and 80 degrees. For example, Figure 5 The preferred repositioning angle range of the central prism film 16 is 12 degrees to 75 degrees (front closed, rear closed).

[0048] Figure 5 The diagram shows the four solar altitude angle ranges throughout the day and the corresponding tilt states of two adjacent blades, with the solar altitude angle ranging from 0 degrees to 80 degrees. In the first sub-figure, arranged from left to right, the altitude angle range is 0 degrees to 45 degrees, at which point the prism plate's tilt angle is the first negative tilt angle (e.g., the first tilt angle). Figure 5 As shown in the diagram, rotating 15 degrees counterclockwise from the vertical plane, the incident angle of the prism film ranges from 15 degrees to 60 degrees, which is within the preferred redirection angle range of the prism film; in the second sub-figure, the elevation angle ranges from 45 degrees to 60 degrees, at which point the tilt angle of the prism plate is a negative second tilt angle (e.g., Figure 5 As shown in the diagram, rotating 7 degrees counterclockwise from the vertical plane, the incident angle of the prism film ranges from 52 degrees to 67 degrees, which is within the preferred redirection angle range of the prism film. In the third sub-diagram, the elevation angle ranges from 60 degrees to 70 degrees, at which point the tilt angle of the prism plate is zero degrees, and the incident angle of the prism film ranges from 60 degrees to 70 degrees, which is also within the preferred redirection angle range of the prism film. In the fourth sub-diagram, the elevation angle ranges from 70 degrees to 80 degrees, at which point the tilt angle of the prism plate is a positive fourth tilt angle (e.g., a fourth tilt angle). Figure 5As shown, rotating the prism film 7 degrees clockwise from the vertical plane results in an incident angle range of 63 to 73 degrees, which falls within the preferred redirection angle range of the prism film. Throughout the day, the incident angle range of the prism film is 15 to 73 degrees, also within the preferred redirection angle range, thus achieving excellent light redirection and preventing glare caused by extremely high or low solar altitude angles. Simultaneously, limiting the tilt range of the prism plate to a small extent avoids large gaps between adjacent blades that could lead to light leakage. The phased adjustment method, performing small tilt operations across multiple altitude angle ranges, reduces the impact on people indoors.

[0049] See still Figure 5 Based on the above-described shape and structural design of the prism plate 12, the first diffuse transmission plate 13, and the second diffuse transmission plate 14, the limitation of the tilt angle of the prism plate 12, and the limitation of the spacing between the blades 11 and the extension distance of the first diffuse transmission plate 13 and the second diffuse transmission plate 14, the following light-blocking effect can be achieved. In one embodiment, when the prism plate 12 in each blade 11 is at the first tilt angle (see...), Figure 5 (See the first sub-figure). In two adjacent blades 11, the second diffuser plate 14 of the upper blade contacts the first diffuser plate 13 of the lower blade. This contact includes both non-overlapping and overlapping contact, thereby achieving the blocking of low-angle incident light. When the prism plate 12 in each blade 11 is at a second tilt angle (see...), Figure 5 (See the second sub-figure). In two adjacent blades 11, a gap is formed between the second diffuser plate 14 of the upper blade and the first diffuser plate 13 of the lower blade. Sunlight incident into this gap is blocked by the second diffuser plate 14 of the upper blade or the first diffuser plate 13 of the lower blade, thereby improving the connectivity between the indoor and outdoor spaces while preventing light leakage. When the prism plate 12 in each blade is at a third or fourth tilt angle (see...), Figure 5 (The third and fourth sub-figures) In two adjacent blades 11, a gap is formed between the second diffuser plate 14 of the upper blade and the first diffuser plate 13 of the lower blade. Sunlight incident into this gap is blocked by the second diffuser plate 14 or prism plate of the upper blade, which also improves the connection between indoor and outdoor spaces while preventing light leakage.

[0050] It is evident that, based on the specific shape and structure of the diffuser plate, the restricted angular rotation of the prism plate 12, and the limitations on the spacing between the blades 11 and the extension distance of the diffuser plate in practical applications, light leakage can be prevented at all times. Furthermore, in most cases (e.g., when the prism plate is at the second, third, or fourth tilt angle), sunlight is blocked from the incident gaps by the cooperation between adjacent diffuser plates, even with gaps between the blades. This optimizes the connectivity between the interior and exterior spaces without causing light leakage and provides a certain degree of external visibility to people inside. The existence of these gaps also facilitates the subsequent rotation of the blades 11 and the prism plate 12, preventing the diffuser plates of adjacent blades 11 from colliding and affecting the controlled rotation.

[0051] Preferably, the following formulas can be used to limit the following relationships: the width of the prism plate 12 (the width direction of the prism plate is perpendicular to its length direction, and the length direction of the prism plate is its lateral extension direction; in this embodiment, the widths of the prism plates of each blade are equal), the extension distance of the diffuse transmission plate (i.e., the distance extended inward or outward, equal to the width of the diffuse transmission plate; in this embodiment, the extension distances of the two diffuse transmission plates are equal), the maximum tilt angle of the prism plate 12 (taking the absolute value), the fixed angle between the diffuse transmission plate and the prism plate 12 (e.g., the first fixed angle and the second fixed angle; in this embodiment, the first fixed angle and the second fixed angle are equal), and the spacing between the prism plates of adjacent blades 11 (in this embodiment, the blades are arranged at equal intervals):

[0052]

[0053] Where x represents the width of the prism plate, y represents the width of the diffuse transmission plate, α represents the maximum tilt angle of the prism plate (absolute value is taken here), θ represents the angle of the fixed included angle, and a represents the spacing between the prism plates.

[0054] The derivation process is as follows: See Figure 6 When the solar altitude angle is between 0° and 45°, the current tilt angle of the prism plate (e.g., -15°) can be the tilt angle with the largest absolute value. At this point, the possibility of light leakage is greatest. The limiting state corresponds to the adjacent diffuse transmission plates of the upper and lower blades being in contact, not overlapping, and coplanar. Figure 6 It can be known that:

[0055]

[0056] a = 2y·sin(θ - ∠1)

[0057] Since ∠1 = 90° - α, combining the two yields the aforementioned limiting formula. Based on this formula, specific parameters can be determined, enabling interference-free contraction, expansion, and rotation between the blades while ensuring no light leakage. Furthermore, the maximum and minimum values ​​of the diffuse transmission plate width and prism plate spacing can be set according to the formula. For example, the minimum value of the diffuse transmission plate width can be set to 5% of the prism plate width, and the maximum value of the prism plate spacing can be set to 25% of the prism plate width. It should be understood that the above specific values ​​are merely examples and are not intended to limit the invention.

[0058] Thus, the first diffuse transmission plate 13 at the top of the prism plate 12 is designed to align with the top of the prism plate 12 and extend into the internal space of the light-guiding louver system, while maintaining a first fixed angle as an obtuse angle; the second diffuse transmission plate 14 at the bottom of the prism plate 12 is designed to align with the bottom of the prism plate 12 and extend into the external space of the light-guiding louver system, while maintaining a second fixed angle as an obtuse angle, ultimately forming... Figure 2 , Figure 4 and Figure 5 The reverse Z-shaped blade is shown. Compared with the positive Z-shaped blade where the first diffuser plate 13 extends outward into the external space and the second diffuser plate 14 extends inward into the internal space, the reverse Z-shaped blade structure of this embodiment can avoid collision and conflict between adjacent blades, facilitate the synchronous and controlled rotation of each blade, and can also generate gaps between adjacent blades in multiple rotation states as mentioned above to improve the connectivity between the internal and external spaces. Through the aforementioned structural design, it can be ensured that the gap will not be directly penetrated by sunlight, causing glare.

[0059] As an optional solution, the light-guiding louver system may further include a perforated louver structure 20, located below the daylight redirection louver structure 10, which may include multiple louvers 21. Each louver 21 may be controlled (including automatic and manual control) to rotate synchronously, and may also be controlled (including automatic and manual control) to retract and expand. Each louver 21 may include a perforated plate 22 made of an opaque material (e.g., aluminum alloy) or a translucent material, with multiple evenly distributed through holes 25 connecting the indoor space and the outdoor space to further provide outdoor views to occupants. Exemplarily, the aperture ratio (the ratio of the sum of the through hole areas of each perforated plate to the sum of the surface areas of each perforated plate) may be set to 10% to 40%, thereby achieving a balance between light shading and views.

[0060] As a preferred embodiment, each louver 21 may further include: a third diffuse transmission plate 23 fixed to the top of the perforated plate 22 and a fourth diffuse transmission plate 24 fixed to the bottom of the perforated plate 22. The third diffuse transmission plate 23 is aligned with the top of the perforated plate 22 and extends inward from the top of the perforated plate 22, forming a third fixed angle between the third diffuse transmission plate 23 and the perforated plate 22; the fourth diffuse transmission plate 24 is aligned with the bottom of the perforated plate 22 and extends outward from the bottom of the perforated plate 22, forming a fourth fixed angle between the fourth diffuse transmission plate 24 and the perforated plate 22. The third and fourth fixed angles can be set as obtuse angles. In practical applications, the perforated plate 22 of each louver 21 in the above perforated louver structure 20 can be rotated to the required angle under manual control. It can rotate independently of the solar altitude angle or be automatically controlled to rotate at a small angle according to the solar altitude angle. Thus, the third diffuse transmission plate 23 and the fourth diffuse transmission plate 24, together with the perforated plate 22, form inverted Z-shaped louvers 21 to achieve good light blocking and anti-glare effects. The gaps between adjacent louvers 21 can also form to prevent light leakage and improve the connection between indoor and outdoor spaces, while also helping to further expand the field of vision.

[0061] In an optional embodiment, the third fixed angle can be set to be equal to the fourth fixed angle, with both angle values ​​between 100 and 170 degrees; the perforated plate 22, the third diffuse transmission plate 23, and the fourth diffuse transmission plate 24 can be rectangular planar plates, with the third diffuse transmission plate 23 and the fourth diffuse transmission plate 24 having identical shapes, and their lengths being equal to the length of the perforated plate 22; the third diffuse transmission plate 23 and the fourth diffuse transmission plate 24 are made of isotropic diffuse translucent material (such as frosted glass, a specific resin, etc.); the louvers 21 in the perforated louver structure 20 are arranged at equal intervals. In specific applications, the third diffuse transmission plate 23 and the fourth diffuse transmission plate 24 can be non-perforated structures, but preferably both have uniformly distributed through holes 25 to further provide a transparent field of view.

[0062] Specifically, the perforated louver structure 20 can be positioned below the window. If a similar structure to the daylight redirection louver structure 10 is installed in this location, the redirected upward light will cause glare from below the occupants. The perforated louver structure 20 can prevent this glare. By combining the perforated louver structure 20 at the bottom with the daylight redirection louver structure 10 at the top, light incident from the top can be directed upward through the daylight redirection louver structure 10 to the ceiling and then into the deeper space of the room, thus preventing glare from downward sunlight. Light incident from the bottom is blocked by the perforated louver structure 20 to prevent glare from upward light, thereby achieving a global anti-glare and anti-light leakage effect at the window location.

[0063] The following describes the control system of an embodiment of the present invention. See also Figure 7A dynamic light-guiding louver system that provides both glare reduction and improved visibility may include a control unit 30 and a power unit 40. The control unit 30 may be based on a microcontroller or other control device, while the power unit 40 may be an electric motor or similar device. The control unit 30 determines the current solar altitude angle based on the current latitude, longitude, and time, and sends a blade rotation command to the power unit 40 when it determines that the range of the current solar altitude angle has changed. In response to the received blade rotation command, the power unit 40 rotates each blade 11 in the solar redirection louver structure 10, positioning the prism plate 12 in each blade 11 at an angle corresponding to the current solar altitude angle range. This achieves automatic calculation of the solar altitude angle and automatic tilt control of the blades 11. The latitude, longitude, and time can be obtained through a positioning chip built into the control unit or through interaction with a remote server. Generally, the control unit 30 can issue a blade rotation command immediately when the elevation angle range changes. For example, when the control unit 30 detects that the solar elevation angle reaches 45 degrees at the first moment (at which time the elevation angle range where the solar elevation angle is located changes from the first elevation angle range to the second elevation angle range), it issues a blade rotation command carrying a second tilt angle (such as -7 degrees) corresponding to the second elevation angle range.

[0064] In an optional technical solution, the light-guiding louver system may further include a solar radiation monitoring unit 50 for collecting solar radiation data and transmitting it to the controller 30 in real time. Exemplarily, the solar radiation data may be solar radiation power data or illuminance data. In specific applications, when the control unit 30 determines that the current solar radiation data has increased to a preset threshold (i.e., the solar radiation threshold), it sends a louver deployment command to the power unit 40 to deploy the daylight redirection louver structure 10 and the perforated louver structure 20 to cover the window area. When the control unit 30 determines that the current solar radiation data has decreased to the threshold, it sends a louver retraction command to the power unit 40 to retract the daylight redirection louver structure 10 and the perforated louver structure 30 to expose the window area, thereby achieving automatic deployment of the louver system in strong light environments and automatic retraction of the louver system in low light environments such as cloudy or rainy days.

[0065] The control unit can also switch between automatic and manual control modes. In manual control mode, the operator can manually control the tilt angle of the blades 11 and louvers 21, as well as the retraction and deployment of the sun-redirecting louver structure 10 and the perforated louver structure 20. The tilt angle of the blades 11 in manual control mode can exceed the limits set in automatic control mode. It should be noted that the power unit 40 can achieve the rotation of the blades 11 and the retraction and deployment of the sun-redirecting louver structure 10 and the perforated louver structure 20 based on known mechanical structures. For example, multiple pulleys cooperate with the traction ropes installed on each blade and the perforated louver structure to achieve retraction and deployment, and turbines, worm gears, rollers, and rotating ropes installed on each blade are configured to achieve blade rotation.

[0066] Figure 8 This is a schematic diagram illustrating the sunlight redirection effect according to an embodiment of the present invention. Figure 8 As shown, in this embodiment of the invention, incident light is redirected upwards through adaptive blade rotation in all four solar altitude angle ranges. The upward light enters the deeper interior space through the ceiling, thereby increasing the natural lighting area. Additionally, some light is diffused into the interior through the first and second diffuser panels, also preventing glare for occupants. Figure 8 The louver state in the diagram refers to the tilt angle α of the prism plate.

[0067] In one embodiment, the glare probability (DGP) of a glass window with only glass installed, a simplified louver system with the above-mentioned rotatable prism plate installed but without the first diffuser plate and the second diffuser plate installed, and without the perforated louver structure installed, can be measured experimentally. Measurement results show that when the solar altitude angle β is between 0° and 45°, the simplified venetian blind system reduces the glare probability by 10% compared to a glass window, while the light-guiding venetian blind system reduces it by 40%. When the solar altitude angle β is between 45° and 60°, the simplified venetian blind system reduces the glare probability by 30% compared to a glass window, while the light-guiding venetian blind system reduces it by 13%. When the solar altitude angle β is between 60° and 70°, the simplified venetian blind system reduces the glare probability by 25% compared to a glass window, while the light-guiding venetian blind system reduces it by 20%. When the solar altitude angle β is between 70° and 80°, the simplified venetian blind system reduces the glare probability by 18% compared to a glass window, while the light-guiding venetian blind system reduces it by 30%.

[0068] In the technical solution of this invention, a prism plate that can dynamically rotate with the solar altitude angle achieves sunlight redirection at any solar altitude angle throughout the day. A first and second diffuse transmission plate, bent and connected to the prism plate in each blade, prevents light leakage and glare. A perforated louver structure addresses the viewing defects of traditional louver systems and further avoids glare. Simultaneously, this anti-glare, visually-enhancing dynamic light-guiding louver system of this invention can still provide good indoor lighting and avoid glare even when the louver blades are fully closed due to excessive outdoor sunlight.

[0069] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A dynamic light-guiding louver system that provides both anti-glare and a clear field of vision, characterized in that, include: Sunlight redirection louver structure; The daylight redirection louver structure includes: a plurality of horizontally extending and parallel blades, each blade including: a prism plate, a first diffuse transmission plate fixed to the top of the prism plate and a second diffuse transmission plate fixed to the bottom of the prism plate; The prism plate includes: a light-transmitting substrate and a prism film attached to the substrate; a first diffuse transmission plate is aligned with the top of the prism plate and extends inward from the top of the prism plate, forming a first fixed angle between the first diffuse transmission plate and the prism plate; a second diffuse transmission plate is aligned with the bottom of the prism plate and extends outward from the bottom of the prism plate, forming a second fixed angle between the second diffuse transmission plate and the prism plate; the first fixed angle and the second fixed angle are obtuse angles; the first fixed angle and the second fixed angle are equal, and the angle value is between 100 degrees and 170 degrees; In the solar redirection louver structure, each blade is automatically and synchronously rotated in control as the current solar altitude angle changes within its altitude angle range. This causes the prism plate in each blade to be at a preset tilt angle corresponding to the current solar altitude angle range, ensuring that the incident angle of sunlight on the prism film is within the preset redirection angle range of the prism film throughout the day. The tilt angle of the prism plate is the angle from the vertical plane to the prism plate, and the maximum value of the tilt angle is 30 degrees. Furthermore, when the rotation direction from the vertical plane to the prism plate via the shortest path is counterclockwise, the tilt angle value is negative; when the rotation direction from the vertical plane to the prism plate via the shortest path is clockwise, the tilt angle value is positive; the elevation angle range includes: a first elevation angle range, a second elevation angle range, a third elevation angle range, and a fourth elevation angle range, with the angles increasing sequentially and not overlapping; the first elevation angle range corresponds to the first tilt angle of the prism plate, the second elevation angle range corresponds to the second tilt angle of the prism plate, the third elevation angle range corresponds to the third tilt angle of the prism plate, and the fourth elevation angle range corresponds to the fourth tilt angle of the prism plate; the first tilt angle, the second tilt angle, the third tilt angle, and the fourth tilt angle increase sequentially, with the first and second tilt angles having negative values, the third tilt angle having a zero value, and the fourth tilt angle having a positive value; Furthermore, when the prism plates in each blade are at a first tilt angle, in two adjacent blades, the second diffuser plate of the upper blade contacts the first diffuser plate of the lower blade; when the prism plates in each blade are at a second tilt angle, in two adjacent blades, a gap is formed between the second diffuser plate of the upper blade and the first diffuser plate of the lower blade, and sunlight incident into the gap is blocked by the second diffuser plate of the upper blade or the first diffuser plate of the lower blade; when the prism plates in each blade are at a third tilt angle or a fourth tilt angle, in two adjacent blades, a gap is formed between the second diffuser plate of the upper blade and the first diffuser plate of the lower blade, and sunlight incident into the gap is blocked by the second diffuser plate of the upper blade or the prism plate. The system further includes: a perforated louver structure located below the daylight redirection louver structure; wherein... The perforated louver structure includes multiple louver blades, each louver blade including a perforated plate made of opaque or translucent material, wherein the perforated plate of each louver blade has multiple evenly distributed through holes to provide a field of view. The louvered plate further includes: a third diffuse transmission plate fixed to the top of the perforated plate and a fourth diffuse transmission plate fixed to the bottom of the perforated plate; wherein, The third diffuse transmission plate is aligned with the top of the perforated plate and extends inward from the top of the perforated plate, forming a third fixed angle between the third diffuse transmission plate and the perforated plate; the fourth diffuse transmission plate is aligned with the bottom of the perforated plate and extends outward from the bottom of the perforated plate, forming a fourth fixed angle between the fourth diffuse transmission plate and the perforated plate; the third fixed angle and the fourth fixed angle are obtuse angles.

2. The system according to claim 1, characterized in that, The lower limit of the redirection angle range of the prism film is between 10 degrees and 30 degrees, and the upper limit is between 60 degrees and 80 degrees.

3. The system according to claim 1, characterized in that, The prism plate, the first diffuse transmission plate, and the second diffuse transmission plate are rectangular planar plates. The first diffuse transmission plate and the second diffuse transmission plate have the same shape, and the lengths of the first diffuse transmission plate and the second diffuse transmission plate are equal to the length of the prism plate. The blades in the solar redirection louver structure are arranged at equal intervals.

4. The system according to claim 1, characterized in that, The first and second diffuse transmission plates are made of isotropic diffuse transmission translucent material, and the substrate is made of transparent material.

5. The system according to claim 1, characterized in that, The third fixed angle is equal to the fourth fixed angle, and the angle value is between 100 degrees and 170 degrees. The perforated plate, the third diffuse transmission plate, and the fourth diffuse transmission plate are rectangular planar plates. The third diffuse transmission plate and the fourth diffuse transmission plate are identical in shape, and the lengths of the third diffuse transmission plate and the fourth diffuse transmission plate are equal to the length of the perforated plate. The third diffuse transmission plate and the fourth diffuse transmission plate are made of isotropic diffuse translucent material and have multiple uniformly distributed through holes. The perforated louver structure has louvers arranged at equal intervals.

6. The system according to claim 1, characterized in that, The system further includes: a control unit and a power unit; The control unit determines the current solar altitude angle based on the current latitude and longitude and the current time, and sends a blade rotation command to the power unit when it determines that the range of the current solar altitude angle has changed. The power unit responds to the received blade rotation command by rotating each blade in the solar redirection louver structure, so that the prism plate in each blade is at an angle corresponding to the current solar altitude angle range.

7. The system according to claim 6, characterized in that, The system further includes: a solar radiation monitoring unit for collecting solar radiation data and sending it to the control unit; When the control unit determines that the current solar radiation data has increased to a preset threshold, it sends a louver deployment command to the power unit to deploy the solar redirection louver structure and the perforated louver structure. When the control unit determines that the current solar radiation data has decreased to the threshold, it issues a louver retraction command to the power unit to retract the solar redirection louver structure and the perforated louver structure.

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