LAMINATED PANE COMPRISING A PHOTOPOLYMER LAYER AND PDLC ELEMENT

Abstract

A laminated pane, includes, in this order, an outer pane, an intermediate layer, a functional element with electrically controllable optical properties that is selected from among a PDLC functional element, a PNLC functional element, or an SPD functional element, an intermediate layer, a holographic display element, an intermediate layer, and an inner pane.

Claims

1. A laminated pane, comprising, in this order, an outer pane, a first intermediate layer, a functional element with electrically controllable optical properties that is selected from among a PDLC functional element, a PNLC functional element, or an SPD functional element, a second intermediate layer, a holographic display element, a third intermediate layer, and an inner pane.

2. The laminated pane according to claim 1, wherein the holographic display element comprises, in this order, a cover layer, a photopolymer layer, and a substrate layer.

3. The laminated pane according to claim 2, wherein the functional element comprises, in this order, a first carrier layer, a first surface electrode, an active layer, a second surface electrode, and a second carrier layer.

4. The laminated pane according to claim 1, wherein the functional element is a PDLC functional element.

5. The laminated pane according to claim 2, wherein the substrate layer of the holographic display element is formed from polyamide (PA) film or cellulose triacetate (TAC) film, and/or the cover layer of the holographic display element is formed from polyamide (PA) film, cellulose triacetate (TAC) film, polymethyl methacrylate (PMMA) film, or polyethylene terephthalate (PET) film.

6. The laminated pane according to claim 1, wherein the first, second and third intermediate layers are formed from polyvinyl butyral (PVB) film, thermoplastic polyurethane (TPU) film, ethylene vinyl acetate copolymer (EVA) film, OCA film, or a combination thereof.

7. The laminated pane according to claim 3, wherein in the holographic display element, the substrate layer has a thickness in the range from 50 to 200 μm, the photopolymer layer has a thickness in the range from 10 to 80 μm, and/or the cover layer has a thickness in the range from 50 to 250 μm, and/or in the functional element, the first and second carrier layers have, independently in each case, a thickness in the range from 100 to 200 μm, the first and second surface electrodes have, independently in each case, a thickness in the range from 30 to 400 nm, and/or the active layer has a thickness in the range from 10 to 30 μm, and/or the first, second and third intermediate layers have, independently in each case, a thickness in the range from 200 to 800 μm.

8. The laminated pane according to claim 3, wherein in the functional element, the first and second carrier layers are formed from polyethylene terephthalate (PET) film, and/or the first and second surface electrodes are formed from ITO layers.

9. A method for generating visual information with a head-up display, comprising generating an image with an imaging unit, and directing the image onto a laminated pane according to claim 1 as a projection surface, wherein the visual information is viewed from a space that faces a side of the inner pane.

10. A method comprising forming a projection surface for a head-up display with the laminated pane according to claim 1.

11. The method according to claim 10, wherein the laminated pane is mounted in a vehicle or in a structure.

12. A vehicle or structure, in which a laminated pane according to claim 1 is mounted.

13. A vehicle or structure according to claim 12, that is a vehicle selected from among a motor vehicles, transport vehicles, or that is a structure wherein the laminated pane is mounted as a window pane or a separating pane.

14. The vehicle or structure according to claim 12, wherein the laminated pane is a rear window, side window, windshield or roof panel of a vehicle.

15. The vehicle or structure according to claim 12, in which a head-up display is mounted that comprises an imaging unit, wherein the laminated pane serves as a projection surface of the head-up display.

16. The laminated pane according to claim 8, wherein in the functional element is the PDLC functional element.

17. The method according to claim 9, wherein the laminated pane is mounted in a vehicle or a structure.

18. The vehicle or structure according to claim 13, wherein the motor vehicle is a passenger car and the transport vehicle is a bus, a train an aircraft, or a watercraft.

Description

[0066] FIG. 1 a detail of a prior art laminated pane with a holographic display element in cross-section,

[0067] FIG. 2 a detail of a prior art laminated pane with a PDLC functional element in cross-section,

[0068] FIG. 3 a detail of a laminated pane according to the invention in cross-section.

[0069] FIG. 1 depicts a prior art laminated pane with a holographic display element 3 in cross-section. The laminated pane comprises an outer pane 1 and an inner pane 2, between which a holographic display element 3 is laminated. The holographic display element 3 is formed, in this order, from a cover layer 5, a photopolymer layer 6, and a substrate layer 7.

[0070] The substrate layer 7 is formed, for example, from PA film or TAC film. The cover layer 5 is formed, for example, from PA film, TAC film, PMMA film, or PET film. The substrate layer 7 has a thickness in the range from 50 to 200 μm. The photopolymer layer 6 has a thickness in the range from 10 to 80 μm. The cover layer 5 has a thickness in the range from 50 to 250 μm.

[0071] An intermediate layer 11 that bonds or joins the panes is arranged in each case between the outer pane 1 and the holographic display element 3 and between the inner pane 2 and the holographic display element 3. The intermediate layers are preferably PVB films that have, for example, a thickness in the range from 200 to 800 μm.

[0072] FIG. 2 depicts a prior art laminated pane with electrically controllable optical properties in cross-section. The laminated pane comprises an outer pane 1 and an inner pane 2, between which a PDLC functional element 4 is laminated. The PDLC functional element is formed, in this order, from a carrier layer 8, a surface electrode 9, an active PDLC layer 10, a surface electrode 9, and a carrier layer 8.

[0073] The carrier layers 8 are formed from PET films and have, for example, a thickness in the range from 100 to 200 μm. The surface electrodes 9 are formed from ITO and have, for example, a thickness in the range from 30 to 400 nm. The active layer 10 has, for example, a thickness in the range from 10 to 30 μm.

[0074] An intermediate layer 11 that bonds or joins the panes is arranged in each case between the outer pane 1 and the PDLC element 4 and between the inner pane 2 and the PDLC element 4. The intermediate layers are preferably PVB films that have, for example, a thickness in the range from 200 to 800 μm.

[0075] FIG. 3 depicts, in cross-section, a detail of a laminated pane according to the invention that has a combination of PDLC film and holographic film in glass. The laminated pane is suitable as a projection surface for a holographic head-up display (HUD). The laminated pane can be used, for example, as a windshield of an automobile.

[0076] The laminated pane according to the invention comprises, in this order, an outer pane 1, an intermediate layer 11, a PDLC functional element 4 with electrically controllable optical properties, an intermediate layer 11, a holographic display element 3, an intermediate layer 11 and an inner pane 2. In one embodiment, the outer pane 1 is green and the inner pane 2 is white. Both panes 1 and 2 are transparent.

[0077] The PDLC functional element 4 is formed, in this order, from a carrier layer 8, a surface electrode 9, an active PDLC layer 10, a surface electrode 9, and a carrier layer 8. The carrier layers 8 are formed from PET films and have, for example, a thickness in the range from 100 to 200 μm. The surface electrodes 9 are formed from ITO and have, for example, a thickness in the range from 30 to 400 nm. The active layer 10 has, for example, a thickness in the range from 10 to 30 μm.

[0078] The holographic display element 3 is formed from, in this order, a cover layer 5, a photopolymer layer 6, and a substrate layer 7. The substrate layer 7 is formed, for example, from PA film or TAC film. The cover layer 5 is formed, for example, from PA film, TAC film, PMMA film, or PET film. The substrate layer 7 has a thickness in the range from 50 to 200 μm. The photopolymer layer 6 has a thickness in the range from 10 to 80 μm. The cover layer 5 has a thickness in the range from 50 to 250 μm.

[0079] An intermediate layer 11 that bonds or joins the panes and the elements 3 and 4 is arranged in each case between the outer pane 1 and the PDLC element 4, between the inner pane 2 and the holographic display element 3, and between the PDLC element 4 and the holographic display element 3. The intermediate layers are preferably PVB films, that have, for example, a thickness in the range from 200 to 800 μm

LIST OF REFERENCE CHARACTERS

[0080] 1 outer pane [0081] 2 inner pane [0082] 3 holographic display element [0083] 4 functional element with electrically adjustable optical properties, e.g., PDLC [0084] 5 cover layer of the holographic display element [0085] 6 photopolymer layer of the holographic display element [0086] 7 substrate layer of the holographic display element [0087] 8 carrier layer of the functional element [0088] 9 surface electrode of the functional element [0089] 10 active layer of the functional element [0090] 11 intermediate layer