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CN-121977179-A - Rotatable light-splitting light guide optical device

CN121977179ACN 121977179 ACN121977179 ACN 121977179ACN-121977179-A

Abstract

The invention discloses a rotatable light-splitting light guide optical device, and relates to the field of light guide devices. The light guide device aims to solve the problems of uneven light emission and dark areas which are easy to occur when the existing light guide device needs to rotate. The device comprises a light source group, a light shielding sheet and an ellipsoidal light-splitting guide, wherein a light-passing hole on the light shielding sheet is used for controlling the position of light emitted by the light source group, a cavity is formed at the front side focus of the ellipsoidal light-splitting guide by controlling the light-passing hole, a refraction surface with the cavity wall being adaptive is formed at the rear side focus, the light emitted by the light source group from the light-passing hole is reflected by the ellipsoid to the rear side focus based on the law of the ellipsoid and converged to the upper component light branch, the lower component light branch and the light-emitting surface between the branches, wherein the refraction light is distributed to the rear side according to the design proportion after being incident to each refraction surface, and the uniform distribution of the light can be realized. According to the scheme, under the condition that the light source is fixed, the synchronous rotation of the shading sheet and the ellipsoidal light-splitting guide light piece can be realized, and the uniform light emission can be still ensured.

Inventors

  • XIONG YANJIAN

Assignees

  • 常州星宇车灯股份有限公司

Dates

Publication Date
20260505
Application Date
20260323

Claims (10)

  1. 1. A rotatable light splitting guide optic, characterized by: comprising the following steps: A light source group (1), the light source group (1) being for providing uniform light; The light shielding sheet (2) is used for limiting light emitted by the light source group (1) to be emitted through a light through hole (21) formed in the light shielding sheet (2); The ellipsoidal light-splitting guide piece (3), wherein the ellipsoidal light-splitting guide piece (3) is of a light-transmitting ellipsoidal structure, an ellipsoidal surface (33) of the ellipsoidal light-splitting guide piece is a reflecting surface, the light-transmitting hole (21) is positioned at a front focal point of the ellipsoidal light-splitting guide piece (3), a cavity (32) is formed at a rear focal point of the ellipsoidal light-splitting guide piece (3), a refractive surface (34) is arranged on a cavity wall of the cavity (32), and the refractive surface (34) is used for reflecting light emitted from the light-transmitting hole (21) through the ellipsoidal surface (33) and respectively emitting light from two groups of branches (31) at the rear end of the ellipsoidal light-splitting guide piece (3) and light-emitting surfaces (35) positioned between the two branches (31) after being refracted and distributed through the refractive surface (34); The ellipsoidal light-splitting guide (3) and the light shielding sheet (2) can synchronously rotate relative to the light source group (1).
  2. 2. The rotatable light-splitting guide optical device according to claim 1, further comprising a rotation shaft (4), wherein the rotation shaft (4) passes through an elliptical center point of the ellipsoidal light-splitting guide (3) and is used for driving the ellipsoidal light-splitting guide (3) to rotate; meanwhile, the shading sheet (2) is connected with the rotating shaft (4) and can synchronously rotate.
  3. 3. The rotatable light-splitting guide optical device according to claim 1, wherein the elongated line of the long axis of the ellipsoidal light-splitting guide (3) passes through the light-emitting surface (35); the positions of the two groups of branches (31) on the ellipsoidal light-splitting guide piece (3) are symmetrical relative to the long axis of the ellipsoidal light-splitting guide piece (3); the refracting surface (34) is also symmetrical with respect to the long axis of the ellipsoidal light-splitting guide (3).
  4. 4. The rotatable light-splitting light guide optical device of claim 3, wherein the refractive surface (34) comprises: A first refractive surface (341), wherein the first refractive surface (341) is symmetrical relative to the long axis of the ellipsoidal light-splitting guide (3), and the first refractive surface (341) is a paraboloid taking the rear side focus of the ellipsoidal light-splitting guide (3) as the focus; the second refraction surfaces (342), the second refraction surfaces (342) are smoothly connected between included angles formed by the two groups of first refraction surfaces (341), and the second refraction surfaces (342) are arc-shaped curved surfaces; the reflected light is uniformly split into two groups of branches (31) and light-emitting surfaces (35) after being refracted by the first refraction surface (341) and the second refraction surface (342).
  5. 5. The rotatable spectroscopic optical device according to claim 1, characterized in that a notch (36) is formed in the front end of the ellipsoidal spectroscopic element (3), the light shielding sheet (2) being located in the notch (36).
  6. 6. The rotatable light-splitting light guide optical device of claim 1, wherein a light-equalizing pattern is formed on the refractive surface (34).
  7. 7. The rotatable spectroscopic optical device according to claim 1, characterized in that a light equalizing pattern is also formed on the light exit surface (35).
  8. 8. The rotatable spectroscopic optical device according to claim 1, further comprising a light barrier collar (5) being a non-light transmissive light barrier collar; the light blocking decorative ring (5) is provided with a through hole (51) for the middle and rear parts of the ellipsoidal light splitting guide member (3) to pass through.
  9. 9. The rotatable light-splitting guide optical device according to claim 1, wherein the two sets of branches (31) are shaped so as to be axisymmetric or asymmetric with respect to the long axis of the ellipsoidal light-splitting guide (3).
  10. 10. The rotatable light-splitting guide optical device according to claim 8, characterized in that the ellipsoidal light-splitting guides (3) are distributed in an array on the light-blocking bezel (5).

Description

Rotatable light-splitting light guide optical device Technical Field The invention relates to the field of light guide devices, in particular to a rotatable light-splitting light guide optical device. Background The current automobile illumination forward intelligentization, dynamic upgrade, dynamic display car light demand is growing day by day, but current light guide optical device exists obvious short slab, and secondary grading design defect easily leads to luminous uneven, appears dark spot, and when the light source is fixed, rotatory regulation is difficult to compromise luminous effect and flexibility, single device scene suitability poor, the molding is monotonous, can't satisfy car light multi-scene dynamic display and dazzle cool figurative market demand, need a novel optical device break through above-mentioned limitation. CN109973937a refers to a light guide device, where the light source is fixed to the installation position of the light guide device, and when the light guide device rotates, the light source needs to rotate together, and under the scene with multiple rotation requirements of the device, there are problems of complex structure, more wires, and difficult implementation. Disclosure of Invention The invention aims to solve the technical problems that the existing optical device cannot realize uniform light emission and is easy to generate dark spots due to rotation adjustment when a light source is fixed, and the problems of low adjustment flexibility, low modeling adaptation and the like. The technical scheme adopted by the invention for solving the technical problems is that the rotatable light-splitting light guide optical device comprises: The light source group is a uniformly luminous light source body; The light shielding sheet is shielded at the emergent end of the light source group, a light passing hole is formed in the light shielding sheet, and light emitted from the light source group can only be emitted from the light passing hole; The light source comprises an ellipsoidal light-splitting guide piece, a refractive surface, a light-transmitting hole, a light-receiving hole, a light-transmitting hole, a light-receiving hole and a light-receiving hole, wherein the other side of the surface of the ellipsoidal light-splitting guide piece, which is far away from the light-shielding piece, is provided with a branch and a light-emitting surface for light splitting; the rotating shaft is connected with the ellipsoidal light-splitting guide piece and is used for driving the ellipsoidal light-splitting guide piece to rotate, and meanwhile, the light shielding piece and the ellipsoidal light-splitting guide piece synchronously rotate so as to ensure that the light-transmitting hole is always kept at the focus of the ellipsoidal light-splitting guide piece. According to the scheme, the light source (the light source group) is separated from the light guide structure (the ellipsoidal light splitting light guide piece), the problem that the light source and the light guide structure need to be rotated simultaneously when a car lamp needs to be displayed dynamically in the prior art is avoided, and the assembly difficulty is simplified. When the light guide structure is rotated independently, most of energy of the light source cannot be conducted to the light guide structure, and when the light guide structure is used as two fixed branches of the light guide structure, one branch is brighter and the other branch is darker, so that uneven phenomenon is caused. The technical effects that the light-emitting surface and the branched light can not generate obvious difference along with the rotation of the ellipsoidal light-splitting guide piece are achieved by utilizing the combination of the light-shielding sheet limiting light-passing point, ellipsoidal reflection, cavity light-splitting and refraction surface refraction, and the occurrence of dark spots is effectively avoided. Further, the rotation axis coincides with the center of the ellipsoidal light-splitting guide. The arrangement of the position of the rotating shaft ensures that the distance between the rotating shaft and the focus is not changed when the rotating shaft rotates, so that the light transmitted from the light transmission hole can fall on the same position of the ellipsoidal surface of the ellipsoidal light-splitting guide piece before and after rotation and does not deviate. Further, the cavity is in a symmetrical structure, and the symmetrical center line of the symmetrical structure coincides with the center line of the light emitting surface between the two light splitting branches and the center axis of the ellipsoidal light splitting guide piece. The refraction surface comprises a first refraction surface which is arranged up and down symmetrically along the symmetrical central line of the cavity, the first refraction surface is used for dividing a part of refraction light guide into a light splitting branch