Composite pane with an electrical load

Abstract

A composite pane with an electrical load, includes an outer pane and an inner pane that are joined to one another via a thermoplastic intermediate layer, wherein the thermoplastic intermediate layer has a recess that has a receiving opening, the receiving opening is dimensioned such that it is designed for accommodating the electrical load in the recess, and the electrical load is arranged in the recess.

Claims

1. Composite pane with an electrical load, comprising an outer pane and an inner pane that are joined to one another via a thermoplastic intermediate layer, wherein the thermoplastic intermediate layer has a recess that has a receiving opening, the receiving opening is dimensioned such that the receiving opening is designed for accommodating the electrical load in the recess, the electrical load is arranged directly between the outer pane and the inner pane in the recess so that the thermoplastic intermediate layer is absent between the electrical load and the outer pane and between the electrical load and the inner pane, and the recess has a holding device implemented as a frame in which the electrical load is mounted, the frame being arranged in the recess, wherein the frame has a slit for removably receiving the electrical load in the recess.

2. The composite pane according to claim 1, wherein the electrical load has a display device.

3. The composite pane according to claim 1, wherein the recess is dimensioned such that the recess can accommodate the electrical load in a flush manner.

4. The composite pane according to claim 1, wherein no connection is provided between the electrical load and the intermediate layer.

5. The composite pane according to claim 1, wherein the receiving opening is slit-shaped.

6. The composite pane according to claim 1, wherein a connection element of the electrical load extends outward out of the receiving opening.

7. The composite pane according to claim 2, wherein the display device is a display for displaying optical information.

8. The composite pane according to claim 1, wherein the frame has a thickness that is equal to a thickness of the thermoplastic intermediate layer.

9. A method comprising utilizing a composite pane according to claim 1 in a motor vehicle as a windshield or side window.

10. System for reproducing image data, comprising a camera for recording images of the surroundings of a vehicle and a composite pane provided with an electrical load that has a display device for displaying the recorded images, the composite pane comprising an outer pane and an inner pane that are joined to one another via a thermoplastic intermediate layer, wherein the thermoplastic intermediate layer has a recess that has a receiving opening, the receiving opening is dimensioned such that the receiving opening is designed for accommodating the electrical load in the recess, the electrical load is arranged directly between the outer pane and the inner pane in the recess so that the thermoplastic intermediate layer is absent between the electrical load and the outer pane and between the electrical load and the inner pane, and the recess has a holding device implemented as a frame in which the electrical load is mounted, the frame being arranged in the recess, wherein the frame has a slit for removably receiving the electrical load in the recess.

11. Method for producing a composite pane with an electrical load, the composite pane comprising an outer pane and an inner pane that are joined to one another via a thermoplastic intermediate layer, the thermoplastic intermediate layer having a recess that has a receiving opening, the receiving opening being dimensioned such that the receiving opening is designed for accommodating the electrical load in the recess, the electrical load being arranged directly between the outer pane and the inner pane in the recess so that the thermoplastic intermediate layer is absent between the electrical load and the outer pane and between the electrical load and the inner pane, the recess having a holding device implemented as a frame in which the electrical load is mounted, the frame being arranged in the recess, and the frame having a slit for removably receiving the electrical load in the recess, the method comprising: a) providing the thermoplastic intermediate layer, b) cutting out the recess in an edge region of the thermoplastic intermediate layer, wherein a shape of the recess is adapted to a basic shape of the electrical load, c) lying the thermoplastic intermediate layer flat on the inner pane or the outer pane, d) inserting a placeholder into the recess, e) placing the outer pane or the inner pane on the thermoplastic intermediate layer, f) laminating a layer stack comprising inner pane, thermoplastic intermediate layer with the placeholder, and outer pane  to form the composite pane, and g) inserting the electrical load into the recess.

12. The method according to claim 11, wherein the placeholder is removed from the composite pane.

13. The method according to claim 11, wherein the placeholder has, at least partially, a non-adhesive coating.

14. The method according to claim 11, wherein the placeholder is implemented as the holding device that frames the recess between the inner pane and the outer pane and the electrical load is inserted in the holding device.

15. The method according to claim 14, wherein the holding device has a receiving opening.

16. The method according to claim 14, wherein the holding device has a plastic and/or metal construction.

17. The method according to claim 13, wherein the non-adhesive coating is polytetrafluoroethylene.

18. The method according to claim 9, wherein the motor vehicle is a passenger car.

Description

(1) They depict:

(2) FIG. 1 a representation of an embodiment of a composite pane according to the invention having a placeholder, before lamination,

(3) FIG. 2 a plan view of an embodiment of a composite pane according to the invention after removal of the placeholder,

(4) FIG. 3 a plan view of another embodiment of a composite pane according to the invention with a placeholder implemented as a frame,

(5) FIG. 4 a plan view of an embodiment of the placeholder implemented as a frame with a display,

(6) FIG. 5 a plan view of an embodiment of a composite pane according to the invention as a windshield,

(7) FIG. 6 a plan view of another embodiment of a composite pane edge according to the invention as a side window,

(8) FIG. 7 a flowchart of an exemplary embodiment of the method according to the invention for producing a composite pane.

(9) FIG. 1 depicts a composite pane 1 with a placeholder 2 before lamination of the composite pane 1. The composite pane 1 consists of an outer pane 3 made of soda lime glass with a thickness of 2.1 mm, an intermediate layer 4, and an inner pane 5 made of soda lime glass with a thickness of 2.1 mm.

(10) The intermediate layer 4 is a single film made of PVB and has a recess 6 in the edge region. The shape of the recess 6 corresponds to the basic shape of an electrical load that is inserted into the recess 6 after lamination of the composite pane 1. The placeholder 2 is arranged in the recess 6 before lamination.

(11) In the example depicted, the placeholder 2 is implemented in the form of a paper sheet. Its thickness corresponds to the thickness of the intermediate layer 4 such that it is embedded in the intermediate layer 4. The placeholder 2 is dimensioned such that it protrudes out of the recess beyond the edge of the inner pane 5. The recess 6 is adapted to the shape of the placeholder section that protrudes into the composite pane 1. In addition, the placeholder 2 has a coating made of polytetrafluoroethylene. The placeholder 2 is thus clamped in a planar manner between the inner pane 5 and the outer pane 3 in the region of the intermediate layer 4.

(12) This arrangement has proven to be quite useful since the intermediate layer 4 serving to bond the inner pane 5 and the outer pane 3 encloses the placeholder 2 quite well.

(13) FIG. 2 depicts a plan view of an exemplary embodiment of the composite pane 1 of FIG. 1, after lamination. The lamination of the composite pane 1 with the placeholder 2 is carried out in a pressure- and temperature-resistant device. During lamination, the liquefied intermediate layer 4 is delimited in the region of the placeholder 2. Thus, the shape of the recess 6 is retained. After lamination, the placeholder 2 is removed from the recess 6.

(14) If the composite pane 1 with an electrical load instead of the placeholder 2 were exposed during lamination to elevated thermal stresses and pressure, this could result in deformation or destruction of the electrical load. The use of the placeholder 2 provided with a non-adhesive coating has proven to be ideal since the placeholder 2 is detached again from the intermediate layer 4 in a simple manner and can be removed again from the composite pane 1.

(15) FIG. 3 depicts a plan view of another embodiment of a composite pane 1 according to the invention. In the example depicted, the placeholder 2 is implemented as a holding device 7 that frames the recess 6 between the inner pane 5 and the outer pane 3. The frame-shaped holding device 7 has a slit-shaped receiving opening 8 on one side that is provided for accommodating a display. The frame-shaped holding device 7 consists of a metal/plastic construction.

(16) During lamination, the frame-shaped holding device 7 delimits the recess relative to the intermediate layer 4. After lamination, the frame-shaped holding device 7 remains in the composite pane 1.

(17) An OLED display is inserted into the frame-shaped holding device 7 via the slit-shaped receiving opening 8. The holding device 7 also has a plurality of clamps that secure the display as mechanically acting means. When necessary, the clamps permit nondestructive removal of the display.

(18) FIG. 4 depicts a plan view of the frame-shaped holding device 7 of FIG. 3. The display 9 is arranged in the frame-shaped holding device 7.

(19) FIG. 5 depicts a plan view of an embodiment of a composite pane 1 according to the invention as a windshield of a motor vehicle. The display 9 can be an OLED display that is arranged in the central, upper section of the composite pane 1. In the example depicted, the display 9 is a component of a system for reproducing image data that is provided as a replacement for a rearview mirror assembly in the vehicle. A vehicle driver can view the traffic area to the rear using the display 9 via a camera display.

(20) Alternatively, or additionally, such a display 9 can be used for presenting the status information of a traffic light. The outer pane 3 preferably has a black print on the inside in the region near the edge of the glass to conceal the display 9.

(21) FIG. 6 depicts a plan view of another embodiment of a composite pane 1 according to the invention as a side window of a motor vehicle. In the example depicted, the display 9 is installed in a front side window of the vehicle.

(22) FIG. 7 depicts a flowchart of an exemplary embodiment of the method according to the invention for producing a composite pane 1 with an OLED display 9. The production is done in a horizontal state, wherein a) a thermoplastic intermediate layer is prepared, b) a recess 6 is cut out in the edge region of the thermoplastic intermediate layer 4, wherein the shape of the recess corresponds to the basic shape of the OLED display 9, c) the thermoplastic intermediate layer 4 lies flat on the inner pane 5, d) a placeholder 2 is inserted into the recess 6, e) the outer pane 3 is placed on the thermoplastic intermediate layer 4, f) a layer stack comprising inner pane 5, thermoplastic intermediate layer 4 with a placeholder 2, and outer pane 3  is laminated to form a composite pane 1, and g) the OLED display 9 is inserted into the recess 6.

(23) The production of the composite glass by lamination is done in the autoclave method. The bonding of the outer pane 3 and the inner pane 5 is done at an elevated pressure of approx. 10 bar to 15 bar and temperatures of 130° C. to 145° C. over approx. 2 hours.

(24) Through the use of the placeholder 2 during lamination, the shape of the recess 6 that is provided for receiving the OLED display 9 can be retained. Since the OLED display 9 is not exposed to lamination, it cannot be adversely affected by high temperatures and pressure.

(25) In this example, the placeholder 2 is implemented as a plate that is flat and is the same thickness everywhere. After the placeholder has been inserted in the recess 6 in step e), it can protrude laterally beyond the edge of the inner pane 5. This enables the formation of a gripping surface on which the placeholder 2 can be removed from the composite pane 1 after lamination in step f). Advantageously, the placeholder has, in this embodiment, a non-adhesive coating that enables detachment of the placeholder 2 from the intermediate layer 4.

(26) After insertion of the OLED display 9 into the recess 6, the opening of the recess 6 is gas-tightly sealed with a sealant. The OLED display 9 has a connection element that connects the OLED display 9 to a power supply and to a data network. The connection element of the OLED display 9 protrudes beyond the sealant outside the composite pane 1. Bytol is used as the sealant.

(27) Alternatively, the recess 6 along with the OLED display 9 can be sealed in the composite pane 1 by means of subsequent, temporally limited lamination at low temperatures. A PVB used here has a thickness from 50 μm to 0.38 mm.

(28) Optionally, the placeholder 2 can be implemented as a holding device 7, as depicted in FIGS. 3 and 4, that frames the recess 6 between the inner pane and the outer pane 3. Here, the OLED display 9 is inserted into the holding device 7 after lamination in step f). In such an embodiment, the holding device 7 is implemented as a frame that is arranged on the inner pane in step d) of the production method. Thus, the frame delimits the recess 6 relative to the intermediate layer 4. In addition, the holding device 7 can have two clamps that secure the OLED display 9 in the frame. The frame has a receiving opening 8, via which the OLED display 6 is inserted into the recess 6.

LIST OF REFERENCE CHARACTERS

(29) 1 composite pane 2 placeholder 3 outer pane 4 intermediate layer 5 inner pane 6 recess 7 holding device 8 receiving opening 9 display