# US 2017/0284641 A1 · Dimming devices

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- Number: US 2017/0284641 A1
- Document ID: US20170284641A1
- Status: Published application
- Kind: A1
- Application number: 15/626,314
- Filed: 2017-06-19
- Published: 2017-10-05
- Earliest claimed: 2014-12-18
- Assignees: Guangzhou Haoyang Electronic Co., Ltd.
- Applicants: Guangzhou Haoyang Electronic Co., Ltd.
- Inventors: Weikai Jiang
- Web page: https://patentgrep.com/patent/US20170284641A1

## CPC

- F21V 14/08: by movement of the screens {or filters}
- F21V 3/00: Globes; Bowls; Cover glasses (with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506)
- F21V 9/40: with provision for controlling spectral properties, e.g. colour, or intensity
- F21V 11/183: {pivotable}
- F21W 2131/406: for theatres, stages or film studios
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS

## Abstract

A dimming device comprises a light source, a support having a light path corresponding to the light source, a light diffuser, and light shielding blades having notches. The blades and the diffuser are movably disposed on the support. The blades and the diffuser are actuated by independent actuators. The notches move into and out of the light path with the movements of the blades, and the diffuser covers a portion of notches that is within the light path when moving into and out of the light path. The diffuser's movement relative to the light path is not limited to that of the blades, so the diffuser can be precisely controlled to move into a specific position within the light path with an optimal trajectory and at an optimal time point. The diffuser is integrally formed without slots, ensuring diffusion of all light passing through the covered portion of the notches.

## Claims

### Claim 1

A dimming device comprising a light source, a support (1), a diffuser (4) for light diffusion, and blades (2) for light shielding, the support (1) being provided with a light path (6) corresponding to the light source, and notches being provided on the blades (2), wherein the blades (2) and the diffuser (4) are movably disposed on the support (1), with the blades (2) and the diffuser (4) actuated by at least one independent actuator; the notches of the blades (2) move into and out of the light path (6) with the movements of the blades (2) into and out of the light path (6), and the diffuser (4) covers a portion of notches that is within the light path (6) when moving into and out of the light path (6).

### Claim 2 (depends on 1)

The dimming device of claim 1, where in the positions where blades (2) locate outside the light path (6) are designated as end points and the positions where blades (2) locate inside the light path(6) are designated as starting points, and the position where diffuser (4)locates outside the light path(6) is designated as an end point and the position where diffuser (4) locates inside the light path(6) is designated as a starting point; two blades (2) are disposed at each side of the light path (6) and staggered in the direction of the axis of the light path (6); the blades (2) are capable of being projected to a plane perpendicular to the axis of the light path (6); the projections of the two blades (2) on the projection plane keep symmetrical as each of the blades (2) move between its starting point and end point; the notches (3) of the blades (2) form a closed circle on the projection plane before reaching respective starting point from respective end point; and the diffuser (4), when at its starting point, always completely covers the closed circle projected by the notches (3) of the blades (2).

### Claim 3 (depends on 1)

The dimming device of claim 1, wherein the diffuser (4) is actuated by a motor, the motor is disposed on the support (1) with a main shaft (7) of the motor parallel to the axis of the light path (6); the main shaft (7) is provided with an arm (5) rotatable along with the main shaft (7); and the diffuser (4) is disposed at a free end of the arm (5).

### Claim 4 (depends on 2)

The dimming device of claim 2, wherein the blades (2) are actuated by two motors, and the motors are disposed on the support (1) with respective main shaft (7) of the motors parallel to the axis of the light path (6); and each of the two blades (2) is actuated by one of the two motors.

### Claim 5 (depends on 2)

The dimming device of claim 2, wherein the blades (2) are actuated by a single motor disposed on the support (1); the main shaft (13) of the single motor is disposed parallel with the axis of the light path (6); a driving wheel (12) is provided to the shaft (13) and rotatable therewith; the driving wheel (12) has a belt (11) in a shape of the digit “8” to drive a driven wheel (10) to reversely rotate; and the two blades (2) are driven by the driving wheel (12) and the driven wheel (10), respectively.

### Claim 6 (depends on 3)

The dimming device of claim 3, wherein a first stop plunger (9) and a second stop plunger (8) are disposed on the support (1) between which a beam (15) of the arm (5) of the diffuser is disposed; and the beam (15) contacts with the first and second stop plungers (9, 8) when the diffuser (4) is actuated by the arm (5) to move between its starting and end points.

### Claim 7 (depends on 6)

The dimming device of claim 6, wherein the beam (15) is integrated with the arm (5) of the diffuser.

### Claim 8 (depends on 5)

The dimming device of claim 5, wherein a reset plunger (13) is disposed on the support (1) and, correspondingly, a reset bar (14) is provided to an end of one of the blades (2); the reset bar (14) reaches the reset plunger (13) when the corresponding blade is actuated to move to its starting point.

### Claim 9 (depends on 8)

The dimming device of claim 8, wherein the blade (2) that is attached to the driving wheel (12) is integrated with the reset bar (14).

### Claim 10 (depends on 1)

The dimming device of any of claims 1, wherein the notches are provided at an edge of the blades facing the light path and have a V, zigzag or a finger shape.