OPTOELECTRONIC DEVICE WITH AN ACTIVE ELEMENT

Abstract

An optoelectronic device is specified, with a radiation-emitting semiconductor chip configured to generate electromagnetic radiation, and an active element configured to change a physical state, wherein the active element is embedded in a component of the component, and the physical change of state comprises the following: temperature change, sound generation, mechanical motion.

Claims

1. Optoelectronic device, comprising: a radiation-emitting semiconductor chip configured to generate electromagnetic radiation, and at least one active element configured to change a physical state, wherein: the at least one active element is embedded in a component of the device, the at least one active element is arranged spaced apart in lateral directions from the associated at least one radiation-emitting semiconductor chip, the physical change of state comprises the following: temperature change, sound generation, mechanical motion, the at least one active element is configured to exert haptic stimuli on a body part, and the body part comprises skin.

2. Optoelectronic device according to claim 1 with a sensor element configured to detect at least one of the following quantities: temperature, pressure, sound, electromagnetic radiation, electrical capacitance.

3. Optoelectronic device according to claim 2, in which the sensor element is embedded in a component of the device.

4. Optoelectronic device according to claim 1, in which the physical change of state by the active element is haptically detectable.

5. Optoelectronic device according to claim 1, in which at least two of the following elements are arranged spaced apart from one another in a lateral direction: radiation-emitting semiconductor chip, active element, sensor element.

6. Optoelectronic device according to claim 1, in which the component of the device is formed by at least one of the following constituents: cover body, reflector element, carrier.

7. Optoelectronic device according to claim 1, in which the active element and the radiation-emitting semiconductor chip are embedded in a cover body.

8. Optoelectronic device according to claim 6, in which the sensor element is embedded in the cover body.

9. Optoelectronic device according to claim 6, in which the cover body terminates flush with the sensor element and/or the active element in a vertical direction or the cover body projects beyond it.

10. Optoelectronic device according to claim 1, in which the active element is embedded in a reflector element which laterally surrounds the radiation-emitting semiconductor chip at least in places in lateral directions and which is configured to reflect electromagnetic radiation generated by the radiation-emitting semiconductor chip during operation.

11. Optoelectronic device according to claim 1, in which a sensor element is embedded in a reflector element.

12. Optoelectronic device according to claim 1, with a carrier, wherein at least one of the following elements is attached to the carrier and/or embedded in the carrier: the radiation-emitting semiconductor chip, the at least one active element, sensor element.

13. Optoelectronic device according to claim 12, in which the carrier comprises an integrated circuit.

14. Optoelectronic device according to claim 13, in which the integrated circuit electrically connects at least two of the following elements and/or controls at least one of the following elements: the radiation-emitting semiconductor chip, the at least one active element, the sensor element.

15. Display device with a plurality of optoelectronic devices according to claim 1, which is configured to display images or video sequences.

Description

[0035] In the following, an optoelectronic device described here is explained in more detail with reference to the Figures using exemplary embodiments.

[0036] Show it:

[0037] FIGS. 1A, 1B and 1C show a schematic top view and schematic sectional views of an exemplary embodiment of an optoelectronic device described here,

[0038] FIGS. 2 and 3 schematic sectional views of exemplary embodiments of an optoelectronic device described here,

[0039] FIG. 4 shows a schematic top view of an exemplary embodiment of a display device for a plurality of optoelectronic devices described here.

[0040] Identical, similar or similarly acting elements are marked with the same reference signs in the Figures. The Figures and the proportions of the elements shown in the Figures to one another are not to be regarded as true to scale. Rather, individual elements can be oversized for better representability and/or comprehensibility.

[0041] FIGS. 1A, 1B and 1C show an exemplary embodiment of an optoelectronic device 10, wherein the top view is shown in FIG. 1A and the sectional views in FIGS. 1B and 1C.

[0042] The optoelectronic device 10 shown in FIG. 1A comprises at least one radiation-emitting semiconductor chip 1 configured to generate radiation. It is shown that there are three radiation-emitting semiconductor chips 1 for emitting radiation of different wavelengths. The radiation-emitting semiconductor chips 1 are arranged next to one another. Deviating from this, an arrangement in a triangle is also possible, for example. Furthermore, the optoelectronic device 10 comprises one or more active elements 2 and/or one or more sensor elements 3, which are arranged spaced apart form one another in a lateral direction 101 and from the radiation-emitting semiconductor chips 1. The elements are embedded in a reflective cover body 4 which is opaque to the respective radiation.

[0043] The top surface of the cover body 4a shown in FIG. 1B terminates flush with the top surface of the active element 2a, the top surface of the sensor element 3a and the top surface of the radiation-emitting semiconductor chip 1a. The cover body 4 with the embedded elements 1, 2, 3 terminates flush with the carrier 5 on the side facing away from the emission side. The carrier 5 can comprise an integrated circuit 5a, with which the electrical contact of radiation-emitting semiconductor chip 1, active element 2 and/or sensor element 3 is established. Furthermore, the integrated circuit 5a can comprise, for example, the control unit, the evaluation unit and/or the driving unit (not shown here). With these units it is possible, for example, to read and/or drive the radiation-emitting semiconductor chip 1 and/or the at least one active element 2 and/or the at least one sensor element 3.

[0044] FIG. 1C shows the operating state in which the at least one active element 2, here for example piezo actuators, is operated. This produces the mechanical movement in the vertical direction 100, which is indicated by arrows in FIG. 1C. This mechanical movement can be transferred to the cover body 4, for example, in particular to the top surface of the cover body 4a. The top surface of the cover body 4a is located here on the emission side. The top surface of the cover body 4a forms here, for example, the area covered by the body part which is large compared to the top surface of the at least one active element 2a.

[0045] This is to say that the at least one active element transmits the generated stimulus, here for example the vibration, to a larger top surface of the cover body 4a, which can be perceived by the user through the body part. This mechanical stimulus represents the haptic stimulus that is perceived by a body part, which here, for example, is in direct contact with the top surface 1a, 2a, 3a.

[0046] FIG. 2 shows an optoelectronic device 10 in which the at least one active element 2 and/or the at least one sensor element 3 is embedded in the reflector element 6 which laterally surrounds the radiation-emitting semiconductor chip 1 at least in places in lateral directions 101. The reflector element 6 here comprises, for example, a reflector wall which is inclined away from the at least one optoelectronic semiconductor chip and runs obliquely to the main plane of extension of the device. The reflector wall forms an acute angle with the vertical direction 100. The inner surface of the reflector wall facing the radiation-emitting semiconductor chip 1 is configured to reflect the electromagnetic radiation emitted by the radiation-emitting semiconductor chip 1. The at least one active element 2 and/or the at least one sensor element 3 is embedded, for example, on the outer surface of the reflector element 6 facing away from the radiation-emitting semiconductor chip 1. Here the reflector element 6 is arranged at least in places in lateral directions 101 between the radiation-emitting semiconductor chip 1 and the at least one active element 2 and/or the at least one sensor element 3. The at least one active element 2 and/or the at least one sensor element 3 can terminate flush with the reflector element in vertical direction 100.

[0047] Here, the radiation-emitting semiconductor chip 1 is embedded, for example, in the cover body 4, which is transmissive, for example transparent. In this case, the cover body 4 projects beyond the radiation-emitting semiconductor chip 1 in the vertical direction 100 on the emission side. The cover body 4 completely surrounds the radiation-emitting semiconductor chip 1 in lateral directions 101 and extends in lateral directions 101 up to the reflector element 6. The reflector element 6 projects beyond the cover body 4 in vertical direction 100 in the direction of the emission side. On the side facing away from the emission side, the carrier terminates flush with the embedded elements 1, 2, 3.

[0048] FIG. 3 shows an optoelectronic device 10 in which the radiation-emitting semiconductor chip 1 is mounted directly on the carrier 5. In this case, the carrier 5 completely surrounds the at least one sensor element 3. In plan view, the radiation-emitting semiconductor chip 1 is above the at least one sensor element 3. This arrangement is therefore particularly space-saving. The at least one active element 2 can be mounted on the carrier 5 spaced apart from the radiation-emitting semiconductor chip 1 in lateral directions 101 and embedded with the radiation-emitting semiconductor chip 1 in the cover body 4.

[0049] FIG. 4 shows a display device with a plurality of optoelectronic devices 10, which is configured to display images or video sequences. The arrangement of the optoelectronic devices 10 is preferably arranged matrix-like, with a limiting element 7 being arranged between adjacent optoelectronic devices 10. The optoelectronic devices 10 are, for example, embedded in lateral directions 101 next to one another in a second cover body, which forms the limiting element 7. The optoelectronic devices 10 each comprise the cover body 4 in which the radiation-emitting semiconductor chips 1, the at least one active element 2 and the at least one sensor element 3 are embedded and are arranged spaced apart from one another in lateral directions 101. The radiation-emitting semiconductor chips 1 are arranged linearly. Deviating from this, an arrangement in a triangle is also possible.

[0050] Alternatively, the limiting element 7 can be formed by the reflector element 6 which laterally surrounds the radiation-emitting semiconductor chip 1 at least in places in lateral directions 101 and which is configured to reflect electromagnetic radiation generated by the radiation-emitting semiconductor chip 1 during operation. The at least one active element 2 and/or the at least one sensor element 3 is here embedded between the adjacent reflector elements 6.

[0051] The priority of the German patent application DE 102017124455.7 is claimed, the disclosure of which is hereby expressly included by reference.

[0052] The invention described here is not limited by the description based on the exemplary embodiments. Rather, the invention comprises every new feature as well as every combination of features, which in particular includes every combination of features in the claims, even if this feature or this combination itself is not explicitly stated in the claims or exemplary embodiments.

REFERENCE SIGNS LIST

[0053] 1 radiation-emitting semiconductor chip [0054] 1a top surface of the radiation-emitting semiconductor chip [0055] 2 active element [0056] 2a top surface of the active element [0057] 3 sensor element [0058] 3a top surface of the sensor element [0059] 4 cover body [0060] 4a top surface of the cover body [0061] 5 carrier [0062] 5a integrated circuit [0063] 6 reflector element [0064] 7 limiting element [0065] 10 optoelectronic device [0066] 100 vertical direction [0067] 101 lateral directions