Electronic device with lighting system

Abstract

The invention relates to an electronic device with a lighting system. A head-mounted device may include a display for presenting an image to a user. The head-mounted device may have a hand tracker for collecting hand tracking input from a user. The hand tracker may include a steerable illumination system, such as a steerable infrared illuminator. Infrared light may be guided by selectively activating light emitting diodes in the array and / or moving an infrared light source and / or lens in the luminaire using a locator. The infrared image sensor can collect images of the hand. Based on the monitored movement of the hand, the steerable lighting system may steer the infrared light to ensure that the hand remains illuminated even during movement of the hand.

Description

[0001] This application claims priority to U.S. patent application No. 18 / 461,135, filed on September 5, 2023, which is hereby incorporated by reference in its entirety. Technical Field

[0002] The present disclosure relates generally to lighting systems, and more particularly to electronic devices having lighting systems. Background Art

[0003] Electronic devices have components such as image sensors. Operating image sensors under certain ambient lighting conditions, such as low ambient lighting conditions, can be challenging. Summary of the invention

[0004] The electronic device may be provided with sensors and an adjustable lighting system to provide illumination for these sensors.

[0005] The present disclosure provides a head mounted device, which may include a display for presenting images to a user. The head mounted device may have a hand tracker for collecting hand input from the user. The hand tracker may include a steerable lighting system, such as a steerable infrared illuminator. Using a steerable infrared illuminator, infrared illumination may be provided in a relatively narrow beam while illuminating the user's hand. This may help the head mounted device save power while providing satisfactory illumination.

[0006] The infrared light can be directed by selectively activating light emitting diodes in a diode array in the infrared light source and / or by using a positioner to move the infrared light source and / or lens in the illuminator. During operation of the device, the infrared image sensor can collect images of the user's hand. Based on the monitored movement of the hand, the steerable lighting system can direct the infrared light so that the infrared light tracks the moving hand. This helps to ensure that the moving hand will remain illuminated during the hand movement and will not move outside the area illuminated by the illuminator.

[0007] If desired, adjustable lighting systems can be used in laptops, tablets, cell phones, watches, and other devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a schematic diagram of an illustrative electronic device according to one embodiment.

[0009] Figure 2 is a perspective view of an illustrative head mounted device according to one embodiment.

[0010] Figure 3 is a perspective view of an illustrative laptop computer according to one embodiment.

[0011] Figure 4 is a perspective view of an illustrative portable electronic device such as a cellular telephone, tablet computer, or wristwatch device according to one embodiment.

[0012] Figure 5 is a diagram of an illustrative electronic device with a hand tracker or other system including a sensor and an adjustable lighting system to provide illumination for the sensor according to one embodiment.

[0013] Figure 6 , Figure 7 and Figure 8 is a diagram illustrating exemplary lighting coverage of an adjustable lighting system in different operating scenarios according to one embodiment.

[0014] Fig. 9 and Fig.10 is a diagram illustrating an exemplary lighting coverage of an adjustable lighting system in a scene in which multiple target objects are illuminated, according to one embodiment.

[0015] Fig.11 is a diagram of an exemplary adjustable lighting system according to one embodiment.

[0016] Fig.12 , Fig.13 , Fig.14 and Fig.15 is an illustration of how the operation of the Fig.11 Schematic diagram of components of an exemplary adjustable lighting system. DETAILED DESCRIPTION

[0017] Electronic devices may have sensors for collecting user input and taking other measurements. Some electronic devices may use image sensors. For example, an electronic device with video conferencing capabilities may use an image sensor to capture an image of a user during a video call. As another example, an eye tracking system in an electronic device may use an image sensor to capture images of infrared light flashes on a user's eyes, thereby tracking the direction of the user's eye line. Some electronic devices may have hand tracking systems. In a hand tracking system, an image sensor may be used to capture images of a user's hands. By processing these images, the movement of the user's hands and gestures made by the user's hands and / or fingers may be identified and used as a form of user input.

[0018] In some ambient lighting conditions, there may be sufficient ambient light available to operate the image sensor. For example, in bright ambient lighting conditions, an image of a user's hand may be captured satisfactorily. However, in dim ambient lighting conditions, the electronic device may need to emit supplemental lighting to ensure that the user's hand remains visible to the image sensor of the device. The supplemental lighting may be provided at visible wavelengths and / or infrared wavelengths. For example, when tracking a user's hand under dim lighting, supplemental infrared lighting may be emitted. The presence of the supplemental infrared lighting may help the infrared image sensor capture a satisfactory image of the hand. At the same time, using infrared lighting that is not visible to the naked eye may help avoid disturbing nearby people.

[0019] To help ensure that excessive power is not consumed during the generation of supplemental illumination, the electronic device may be provided with an adjustable illumination system. The angular spread and intensity of the emitted illumination may be adjusted in real time to focus on a target object of interest. For example, when tracking a user's hand, the adjustable illumination system may generate an infrared beam focused on the user's hand. As the user's hand moves, the infrared beam may be directed to follow the hand. In this way, irrelevant background objects in the scene do not need to be illuminated. Thus, the use of an adjustable illumination system may help save power.

[0020] Figure 1 is a schematic diagram of an exemplary electronic device. Figure 1 The device 10 may be a head-mounted device (eg, goggles, glasses, a helmet, and / or other head-mounted device), a laptop computer, a portable electronic device such as a cellular phone, a tablet computer, or a wristwatch device, or other electronic device.

[0021] like Figure 1 As shown, device 10 may have a controller such as control 12. Control 12 may have control circuits such as a microprocessor, a microcontroller, a digital signal processor, an application specific integrated circuit, storage devices such as volatile and non-volatile memory, and other storage and processing circuits. Control 12 may be used to process data collected by components in device 10 and may be used to control device operations.

[0022] Device 10 may have one or more infrared image sensors 14 (sometimes referred to as infrared cameras). For example, device 10 may use one or more image sensors 14 to perform gaze tracking, hand tracking, facial recognition, facial and / or body tracking, and / or other operations involving capturing and processing infrared images. Adjustable infrared illumination (e.g., supplemental infrared illumination) may be provided by one or more infrared light sources, such as infrared light source 16. Light source 16 may include one or more light emitting elements (e.g., light emitting diodes, lasers, etc.).

[0023] Device 10 may also include additional components 18 (e.g., additional sensors such as a visible light image sensor (sometimes referred to as a visible light camera), displays and other output devices that emit light (e.g., a head-mounted device display that presents an image to the eyepiece for viewing by a user), touch sensors, force sensors, proximity sensors, temperature sensors, accelerometers, microphones and other sensors, tactile output devices, speakers, actuators (sometimes referred to as locators or motors), a battery for supplying power to device 10, and other components.

[0024] Components of device 10 , such as image sensor 14 , light source 16 , and other components 18 , may be mounted at any suitable locations in device 10 . Figure 2 , Figure 3 and Figure 4 An exemplary mounting arrangement for device components is shown in FIG.

[0025] exist Figure 2 In the example of FIG. 1 , device 10 is a head-mounted device having a head-mounted housing 20 and a headband 22. Housing 20 may have a front portion F and a rear portion R. Figure 1 Components of device 10 may be mounted in a head-mounted housing 20. During operation, a rear portion R of housing 20 may rest against the user's face. An optical assembly including a display and a lens may present an image in a pair of eye zones at rear R for viewing by the user. An outward-facing display may optionally be mounted in region 24 at front F. Components of device 10 such as image sensor 14, light source 16, and other components 18 may be mounted on an outward-facing surface of housing 20 (e.g., at one or more exemplary locations 26 at front F and / or in other portions of housing 20).

[0026] exist Figure 3 In the example of FIG. 1 , device 10 is a laptop computer having housing portions 20-1 and 20-2 that rotate relative to each other about hinge 28. A display may be mounted on portion 20-1 and a keyboard may be mounted on portion 20-2. Components of the laptop computer (such as image sensor 14, light source 16, and other components 18) may be mounted on one or more outward-facing surfaces of housing 20 (e.g., at one or more illustrative locations 26 on housing 20-1 or elsewhere in housing 20).

[0027] Figure 4 is a perspective view of device 10 in an exemplary configuration, where device 10 is a portable electronic device such as a tablet computer, a cellular telephone, or a wristwatch device. Figure 4As shown, device 10 may have a housing such as housing 20. A display, such as a touch screen display, may be mounted on surface 30 of device 10. Components of device 10, such as image sensor 14, light source 16, and other components 18, may be mounted on one or more outward-facing surfaces of housing 20 (e.g., at one or more illustrative locations 26 on surface 30).

[0028] Figure 5 is a diagram of an exemplary electronic device for providing illumination to illuminate a target. Figure 5 As shown, electronic device 10 may include an adjustable lighting system 32 and a sensor 34. Adjustable lighting system 32 (which may sometimes be referred to as a steerable light source, a steerable lighting system, an adjustable lighting system, an adjustable illuminator, or a steerable illuminator) may have one or more light emitting components that emit light 36 (sometimes referred to as illumination), such as a Figure 1 36 can illuminate a target object such as target 38. Light 36 can be visible light and / or infrared light. In the illustrative configurations sometimes described herein as examples, light 36 is infrared light (infrared illumination), and system 32 can be referred to as an adjustable infrared illuminator or a steerable infrared illuminator.

[0029] Target 38 may be an animate or inanimate object. For example, target 38 may include one or more body parts of a user (e.g., the user's hands, fingers, eyes, head, whole body, etc.) or an inanimate object (e.g., a cane). An illustrative configuration in which target 38 is a user's hand and light 36 is infrared hand tracker lighting may sometimes be described as an example.

[0030] When the system 32 and the sensor 34 are used together for hand tracking as a combined system 31 in a head mounted device (or other device), the combined system 31 may sometimes be referred to as a hand tracker or hand tracking system. During hand tracking operations using a hand tracker, hand motions, finger gestures, and other hand inputs may be used as a form of user input to control the operation of the device 10. For example, hand gestures may be used to move virtual objects presented to the user along with the display resources of the device 10, may be used to make menu selections in the displayed content, and the like. Virtual objects (which may sometimes be referred to as computer generated content) may be presented separately or may be combined with real world content (e.g., real world content captured in real time using a forward-facing camera in the housing 20). If desired, a virtual hand may be presented to the user in a position corresponding to the real world position of the user's hand sensed using the hand tracker.

[0031] During operation, as target 38 is illuminated by light 36 and any ambient light that may or may not be present, data may be collected using sensors such as sensor 34 regarding target 38. For example, sensor 34 may include one or more infrared image sensors, such as Figure 1 14 and / or a visible light image sensor (e.g., see component 18). In an arrangement where sensor 34 is an infrared image sensor in a hand tracker, sensor 34 can collect infrared hand images for hand tracking (e.g., infrared hand images illuminated by infrared light 36, sometimes referred to as hand tracking images or infrared hand tracking images). The fields of view of the image sensors can at least partially overlap so that a three-dimensional image can be captured. This allows device 10 to track the position of target 38 in three-dimensional space. For example, sensor 34 can track the movement of the user's hand as the user's hand moves up / down, left / right, and / or forward / backward relative to sensor 34. In a head-mounted device, for example, one or both hands of the user may be within the field of view of sensor 34 and may be illuminated by light 36 (e.g., light 36 may be generated as supplemental lighting whenever the ambient lighting conditions are dim and / or may be generated during other ambient lighting conditions).

[0032] Using sensor 34, an image (e.g., a three-dimensional image from a stereo infrared image sensor) may be captured that shows the position (e.g., position in three-dimensional space) of target 38. By comparing the position of target 38 between consecutive image frames or other suitable time periods, the speed and direction of movement of target 38 may be determined by sensor 34. Based on this monitored hand movement information, sensor 34 may predict the future position of target 38. This allows beam 36 from system 32 to be steered or otherwise adjusted to ensure that target 38 is tracked even when target 38 moves.

[0033] In general, adjustments to the light 36 generated by the system 32 may include adjustments to the emission direction of the light 36 and adjustments to the angular coverage of the light 36 (e.g., beam direction and / or beam size). The light 36 may also be split into multiple beams if desired. In some cases, the intensity of the light 36 may be adjusted (e.g., the output light intensity may be increased whenever appropriate to ensure a desired minimum signal-to-noise ratio when capturing an image with the sensor 34, or may be reduced to save power otherwise). Conditions that may affect the signal-to-noise ratio include ambient light levels, target distance, and target reflectivity (as examples).

[0034] For example, consider a scenario where object 38 moves along direction 40 to location 38'. Using sensor 34, the current location of object 38 can be captured, and motion information indicating the speed and direction of movement of object 38 can be determined. Sensor 34 can then predict the location of location 38' (in three-dimensional space). Using this information from sensor 34, system 32 can direct light 36 toward location 38'. Figure 5 As shown, for example, by making an angular adjustment 42 to the direction of illumination emitted from system 32, the emission direction of light 36 may be changed to a new direction 36'.

[0035] Initially, when a hand tracking (or other object tracking) operation begins, device 10 may not know the location of object 38. Hand tracking may also be momentarily interrupted (e.g., when the user's hand is blocked by an obstacle). Figure 6 As shown, in situations such as these, system 32 may be adjusted to provide flood illumination (e.g., light 36 may completely cover area 44, which may be, for example, the entire field of view of sensor 34). When light 36 is illuminated over all of area 44 in this manner, after the position of target 38 is retrieved by sensor 34, system 32 may be adjusted to narrow the angular spread of light 36. For example, system 32 may be used to produce coverage Figure 7 The system 34 may further include a beam 36 that covers an area 44' of reduced size. Area 44' may be adjusted to overlap target 38 (with sufficient buffer around the edges of target 38 to account for processing delays) so that system 34 may continue to track target 38 despite covering an area that is smaller than area 44. The size of area 44' may be 70% or less, 30% or less, or 15% or less of the total size of area 44 to help conserve power.

[0036] When the target 38 moves (e.g., Figure 7 In the case where the target 38 is moved in the direction 46 of the image processing apparatus 10 , the sensor 34 can detect the movement and, based on the monitored target movement (e.g., monitored hand movement), the system 32 can be adjusted so that the area 44' is moved to illuminate the target 38 in its new position.

[0037] If desired, the region 44' may be divided into a plurality of sub-regions. Fig. 9 As shown, for example, when the targets 38 are positioned adjacent to each other, the region 44' may cover two targets 38. In the case where the targets 38 are separated from each other (e.g., if the user's hands are moved apart), the system 32 may be adjusted to generate two separate beams 36 for the two corresponding separate regions. Fig.10As shown, for example, a first area 44'-1 may be provided with a first light beam 36 to illuminate a first target 38, and a second area 44'-2 may be provided with a second light beam 36 to illuminate a second target 38. If desired, the system 32 may use multiple light emitting devices (such as multiple infrared light emitting diodes) and multiple corresponding light guiding systems to generate multiple discrete (non-connected and non-overlapping) illumination areas that can independently track each of the user's hands.

[0038] Fig.11 is a diagram of an exemplary adjustable illumination system for illuminating a target 38 with light 36. Fig.11 As shown, system 32 may include light source 16 having one or more individual light emitting devices 70. Devices 70 may be individually adjustable light emitting diodes or lasers (as examples). During operation, light source 16 is turned on to generate light 36. Light 36 may be emitted from system 32 through lens 54. Lens 54 may include one or more lens elements that collimate and / or otherwise shape the emitted light 36 from light source 16 and thereby generate one or more desired light beams. Fig.11 In the example of FIG. 5 , light is emitted in direction 60 and is characterized by an angular spread A as shown by dashed line 58. In the vicinity of target 38, this produces an illumination region 44' that overlaps target 38, thereby illuminating target 38. This ensures that target 38 is visible to sensor 34 ( FIG. 5 ) even in low ambient lighting conditions. Figure 5 ) is also visible.

[0039] To direct and shape the light beam 36 emitted from the system 32, the system 32 can adjust which devices 70 are active and can use one or more positioners, such as positioners 50 and 52, to adjust the position of the light source 16 and lens 54. If desired, a given system 32 can have multiple light sources 16, multiple positioners 50, multiple corresponding lenses 54, and multiple positioners 52. The configuration of the system 32 having a single light source 16, a single positioner 50, a single lens 54 (which can be a single element or a multi-element lens), and a single positioner 52 can be described as an example.

[0040] The positioners 50 and 52 may be electromechanical actuators based on piezoelectric elements, motors, solenoids, and / or other adjustable actuators. The positioners 50 and 52 may generally be positionally adjustable in six degrees of freedom (e.g., each positioner may be capable of translating its corresponding component along one or more of three linear dimensions X, Y, and Z, and may be capable of tilting its corresponding component about each of these three linear dimensions). Arrangements in which the positioners 50 and 52 are capable of only a subset of these positional adjustments (e.g., a subset of lateral motion along X, Y, and Z, and a subset of angular rotation about X, Y, and Z) may also be used.

[0041] Light source 16 and lens 54 may be mounted on a gimbal or other mount that allows them to be rotated and / or translated under the control of positioners 50 and 52, respectively. Fig.12 It is shown how a component 62 (which may be a light source 16 and / or a lens 54) may be rotated (tilted) about an axis in a direction 64 to a new (tilted) position 62' by a positioner 50 or positioner 52. This type of operation may be used on the light source 16 and / or the lens 54 to change the direction of (direct) light 36 emitted from the system 32. Fig.13 Component 62 is shown as being able to be translated along direction 66 to a new position 62' using positioner 50 or positioner 52. This type of translation may be used, for example, to move light source 16 and lens 54 closer to each other or further away from each other (e.g., to adjust the angular spread of the output light). If desired, an accelerometer or other sensor in device 10 may detect when device 10 is in free fall (zero gravity) so that light source 16 and lens 54 may be quickly moved apart to avoid undesired, potentially damaging contact between light source 16 and lens 54 when device 10 touches the ground. Fig.14 In the example of FIG. 5 , component 62 is moved (translated) by positioner 50 or 52 along direction 68 to a new position 62 ′. This type of movement can steer the output beam direction.

[0042] Fig.15 1 shows how a subset of one or more devices (light emitting elements) 70 can be turned on while the remaining devices 70 are turned off. By selectively activating the desired devices 70, the size, direction, and shape of the output beam can be adjusted. There can be N devices 70 in the light source 16, and the devices 70 can be arranged in a one-dimensional or two-dimensional array. The value of N can be at least 1, at least 2, at least 4, at least 16, at least 25, at least 36, less than 100, less than 40, and / or other suitable values. Fig.15 In the example of FIG. 7 , initially only device 70 - 1 is turned on, while devices 70 - 2 , 70 - 3 , and 70 - 4 are turned off. As shown by arrow 72 , when it is necessary to adjust the lighting pattern generated by system 32 , the pattern of activated devices 70 can be adjusted. Fig.15, device 70-1 is deactivated, and devices 70-3 and 70-4 remain inactive, while device 70-2 is turned on. Since device 70-2 now produces output light, rather than device 70-1, the location of light emitted from device 70 toward lens 54 changes, thereby changing the resulting direction of output light from system 32. The beam size can be changed by increasing and decreasing the number of active devices 70. For example, when all devices 70 are turned on, light 36 will cover a wider area than when only a single device 70 is turned on. The technique of beam shaping (steering) using selective activation of devices 70 in system 32 can be used in combination with the use of positioner 50 and / or positioner 52 to move light source 16 and / or lens 54, or can be used alone (e.g., positioner 50 and / or 52 can be omitted).

[0043] Although sometimes described in connection with generating supplemental infrared illumination for hand tracking in a head mounted device, the adjustable illumination system 32 may also be used in other contexts, such as in connection with Figure 3 and Figure 4 For example, in a laptop computer configuration ( Figure 3 ) or cell phone, tablet or watch configuration ( Figure 4 ), light 36 may be generated to help illuminate the user's face (or whole body) during a video conference. In this case, light 36 may include infrared light and / or visible light. In any type of device 10, the device 10 may use a display to present an infrared image that has been captured using one or more infrared image sensors for viewing by the user. In these arrangements, light 36 may be used to illuminate part or all of the area covered by the infrared image sensor (e.g., the device 10 may be used for infrared photography or to support the operation of the device 10 in night vision mode). In some arrangements, the system 32 may provide adjustable visible lighting while the sensor 34 collects still and / or video images (e.g., to ensure that the target is visible, thereby achieving a desired artistic effect, etc.). The steerable light beam generated by the system 32 may also be used in the eye tracking system of the device 10 (e.g., a head-mounted device or other device 10). In particular, the system 32 may direct a narrow infrared light beam to various flash locations on the surface of the user's eyes, and the sensor 34 detects and analyzes these flash locations to determine the direction in which the user's eyes are pointing (sometimes referred to as the user's gaze point or gaze direction). One or more adjustable lighting systems 32 and sensors 34 may be used in each device 10 .

[0044] To help protect the user's privacy, best practices may be used to handle any personal user information collected by the device 10. These best practices include meeting or exceeding any applicable privacy regulations. Opt-in and opt-out options and / or other options may be provided that allow users to control the use of their personal data.

[0045] According to one embodiment, a head-mounted device is provided, comprising: a head-mounted shell; a display located in the head-mounted shell; and a hand tracker located in the head-mounted shell, the hand tracker comprising a steerable infrared illuminator configured to provide infrared light; and an infrared image sensor configured to collect infrared hand tracking images illuminated by the infrared light.

[0046] According to another embodiment, the steerable infrared illuminator includes a plurality of infrared light emitting diodes configured to be selectively activated to steer the infrared light.

[0047] According to another embodiment, the steerable infrared illuminator includes a lens and an infrared light source configured to provide infrared light through the lens.

[0048] According to another embodiment, the steerable infrared illuminator includes a positioner configured to move the lens to steer the infrared light.

[0049] According to another embodiment, the positioner is configured to tilt the lens about an axis.

[0050] According to another embodiment, the positioner is configured to translate the lens along an axis.

[0051] According to another embodiment, the steerable infrared illuminator includes a positioner configured to move the infrared light source to steer the infrared light.

[0052] According to another embodiment, the positioner is configured to tilt the infrared light source about an axis.

[0053] According to another embodiment, the positioner is configured to translate the infrared light source along an axis.

[0054] According to another embodiment, the steerable infrared illuminator includes a first positioner configured to move the infrared light source and a second positioner configured to move the lens.

[0055] According to another embodiment, the first positioner is configured to tilt the infrared light source and to translate the infrared light source.

[0056] According to another embodiment, the second positioner is configured to tilt the lens and to translate the lens.

[0057] According to another embodiment, the infrared light source comprises a plurality of independently activated infrared light emitting diodes.

[0058] According to another embodiment, the first positioner is configured to move the infrared light source toward and away from the lens.

[0059] According to one embodiment, a head-mounted device is provided, which includes: a head-mounted shell; a display, which is located in the head-mounted shell; and a hand tracker, which is located in the head-mounted shell, the hand tracker including an adjustable infrared illuminator and an infrared image sensor, the adjustable infrared illuminator is configured to provide infrared light, the adjustable infrared illuminator includes a plurality of infrared light emitting diodes that generate infrared light and a lens through which the infrared light passes, and the infrared image sensor is configured to collect infrared hand tracking images illuminated by the infrared light.

[0060] According to another embodiment, the adjustable infrared illuminator includes a positioner configured to move the infrared light emitting diode.

[0061] According to another embodiment, the adjustable infrared illuminator includes a positioner configured to move the lens.

[0062] According to one embodiment, an electronic device is provided, comprising: a housing; a display located in the housing; an infrared camera located in the housing; and a steerable infrared light illuminator located in the housing and configured to guide infrared light to illuminate a target, the infrared camera being configured to capture an image of the illuminated target.

[0063] According to another embodiment, the infrared camera is configured to monitor movement of the target, and the steerable infrared light illuminator is configured to steer the infrared light to illuminate the target when the target moves based on the monitored movement.

[0064] According to another embodiment, the steerable infrared light illuminator includes a lens and a plurality of independently activated infrared light emitting diodes configured to emit infrared light through the lens.

[0065] The foregoing is merely illustrative and various modifications may be made to the embodiments described. The foregoing embodiments may be implemented independently or in any combination.

Claims

1. A head mounted device, comprising: Head mounted housing; a display located in the head-mounted housing; as well as a hand tracker, the hand tracker being located in the head mounted housing, wherein the hand tracker comprises: a steerable infrared illuminator configured to provide infrared light; and An infrared image sensor is configured to collect an infrared hand tracking image illuminated by the infrared light.

2. The head mounted device of claim 1, wherein the steerable infrared illuminator comprises a plurality of infrared light emitting diodes configured to be selectively activated to steer the infrared light.

3. The head mounted device of claim 1, wherein the steerable infrared illuminator comprises a lens and an infrared light source configured to provide the infrared light through the lens.

4. The head mounted device of claim 3, wherein the steerable infrared illuminator further comprises a positioner configured to move the lens to direct the infrared light.

5. A head-mounted device according to claim 4, wherein the positioner is configured to tilt the lens about an axis.

6. The head mounted device of claim 4, wherein the positioner is configured to translate the lens along an axis.

7. The head mounted device of claim 3, wherein the steerable infrared illuminator further comprises a positioner configured to move the infrared light source to steer the infrared light.

8. The head mounted device of claim 7, wherein the positioner is configured to tilt the infrared light source around an axis.

9. The head mounted device of claim 7, wherein the positioner is configured to translate the infrared light source along an axis.

10. The head mounted device of claim 3, wherein the steerable infrared illuminator further comprises: a first positioner configured to move the infrared light source; and A second positioner is configured to move the lens.

11. The head mounted device of claim 10, wherein the first positioner is configured to tilt the infrared light source and to translate the infrared light source.

12. The head mounted device of claim 10, wherein the second positioner is configured to tilt the lens and translate the lens.

13. The head mounted device of claim 10, wherein the infrared light source comprises a plurality of independently activated infrared light emitting diodes.

14. The head mounted device of claim 13, wherein the first positioner is configured to move the infrared light source toward and away from the lens.

15. A head mounted device comprising: Head mounted housing; a display located in the head-mounted housing; and a hand tracker, the hand tracker being located in the head mounted housing, wherein the hand tracker comprises: an adjustable infrared illuminator configured to provide infrared light, wherein the adjustable infrared illuminator comprises a plurality of infrared light emitting diodes that generate the infrared light and a lens through which the infrared light passes; and An infrared image sensor is configured to collect an infrared hand tracking image illuminated by the infrared light.

16. The head mounted device of claim 15, wherein the adjustable infrared illuminator comprises a positioner configured to move the infrared light emitting diode.

17. The head mounted device of claim 16, wherein the adjustable infrared illuminator comprises a positioner configured to move the lens.

18. An electronic device comprising: shell; a display, the display being located in the housing; an infrared camera, wherein the infrared camera is located in the housing; and A steerable infrared light illuminator is located in the housing and is configured to steer infrared light to illuminate a target, wherein the infrared camera is configured to capture an image of the illuminated target.

19. The electronic device of claim 18, wherein the infrared camera is configured to monitor movement of the target, and wherein the steerable infrared light illuminator is configured to steer the infrared light based on the monitored movement when the target moves, thereby illuminating the target.

20. The electronic device of claim 19, wherein the steerable infrared light illuminator comprises a lens and a plurality of independently activated infrared light emitting diodes configured to emit the infrared light through the lens.

Images