Patent Grant
9084329
The present invention generally relates to control of light sources. In particular, the present invention relates to a control device for controlling properties of light emitted from a light source.
Light sources are widely used in a wide range of ambient lighting applications for creating a particular lighting atmosphere at various locations such as rooms. Professional indoor lighting applications, aimed at as offices, shops, hotels, etc., are particularly important areas of application.
The use of light-emitting diodes (LEDs) in such light sources becomes increasingly common due to, e.g., their low energy consumption, long lifetime, improved robustness and smaller size compared to traditional light sources, such as filamented light bulbs. Such LEDs are also generally capable of emitting light of various colors, which renders it possible to control the color of the light emitted from a luminaire comprising such LEDs. It is also known to control other properties of emitted light from LEDs, such as brightness and saturation, which may be effectuated in various manners.
Particularly in professional indoor lighting applications, it is in general desirable to be able to control a number of properties of the light emitted from the light source in order to be able to adapt to changing conditions and user needs.
Prior art control devices for controlling properties of light sources used in ambient lighting applications generally enable users to adjust the color, brightness, saturation or intensity of the light emitted from the light sources using color variation means, brightness variation means, saturation variation means or intensity variation means arranged on the devices.
Considering for example a color variation means in accordance with the prior art, such means generally are accompanied by a static printed color wheel (e.g. a circular sticker-type indicator) arranged for indicating an available color variation range for the color of light emitted from the light source upon operation of the color variation means. To make changes in brightness, saturation or intensity, corresponding variation means, similar to the color variation means, are in general provided on the device in addition to the color variation means, as the different properties generally have to be represented in different manners (for example, a static color wheel for representing color variation is not suitable for representing intensity variation). However, for a prior art control device capable of controlling a large number of properties, there will accordingly be required a large number of variation means arranged onto the control device, causing the user to be subjected to numerous possible selections to be made, which may result in confusion and frustration.
In addition, for a control device capable of controlling a large number of properties, it is possible that some properties may be represented by a range of available values delimited by two extreme values, e.g. in the form of a maximum and a minimum value, while other properties may be represented by a range of available values that are not delimited by two extreme values. In order to provide a user friendly and intuitive device, it would be desirable with a control device that is capable of communicating to the user during operation of the control device that a property can be represented by a range of values delimited by two extreme values, e.g. in the form of a minimum and a maximum value, if so is the case.
There is thus a need in the art for an improved control device that addresses the above-mentioned problems.
In view of the above, an object of the present invention is to provide an improved control device for controlling properties of light emitted from a light source.
Another object of the present invention is to provide a control device for controlling properties of light emitted from a light source that reduces the number of possible selections that can made by the user, whereby the risk of the user becoming overloaded with too much information at a time may be reduced or eliminated.
Yet another object of the present invention is to provide a control device for controlling properties of light emitted from a light source that is easy to use and understand.
Still another object of the present invention is to provide a control device for controlling properties of light emitted from a light source that is appropriate for properties that may be represented by a range of available values delimited by two extreme values.
One or more of these objects are completely or partially achieved by a control device as defined in the independent claim. Additional embodiments of the present invention are defined in the dependent claims, and further objects of the present invention will become apparent through the following description.
According to the present invention, there is provided a control device adapted to control properties of light emitted from a light source. The control device comprises a touch-sensitive user interface (UI) adapted to visually indicate a range of available values representing at least one property, and to enable a user to control the represented property on the basis of a location touched on the touch-sensitive UI. By the user touching the touch-sensitive UI, the control device is provided with user input. The control device further comprises a communication unit adapted to adjust the controlled property by means of communicating, to the light source, control signals corresponding to the user input. The touch-sensitive UI comprises at least one discontinuity-indicating element adapted to visually indicate a step discontinuity in the range of available values representing the at least one property.
The at least one discontinuity-forming element enables implementation a so called “hard transition” in the range of available values representing property represented on the UI. In the context of the present invention, by the term “hard transition” it is meant a portion of the visual appearance of the touch-sensitive UI that indicates to the user the presence of a step discontinuity in the range of available values representing the at least one property, for example between the extreme values in the range of available values representing the at least one the property. Furthermore, the at least one discontinuity-forming element enables representing a property of light emitted by a light source by a representation that may be ideal for a property that can be represented by a range of values delimited by two extreme values, e.g. in the form of a minimum and a maximum value, such as brightness, saturation, color temperature, etc. In this manner, the extreme values, e.g. a minimum and a maximum value, of the range of available values may be clearly communicated to the user, whereby an even more user-intuitive UI may be provided, and consequently the user friendliness of the control device may be further increased.
In the context of the present invention, by a “user-intuitive” device or element it is meant a device or element that is intuitive, non-complex and straightforward for a user to operate/use.
A control device according to the present invention may be used to control indoor lighting applications, especially professional indoor lighting applications aimed at shops, offices, hotels, etc. The control device comprises a single UI for controlling all of the different controllable properties, where each property is controlled by the user via user input on the UI. Thus, according to the present invention there is no need for including several control or variation means, each for controlling a particular property. Such a control device enables representing one controllable property on the UI at a time, and as a result the number of possible selections that the user can make is reduced, whereby the risk of the user becoming overloaded with too much information at a time may be reduced or alleviated. In this way, the complexity of the control device may be decreased and the user friendliness may be increased. Furthermore, as there is no need for including several control or variation means, each for controlling a particular property, the manufacturing costs of the control device may be kept at a relatively low level.
The user input on the control device by touching the touch-sensitive UI may for example comprise, but is not limited to, the user tap or tapping the touch-sensitive UI, i.e. the user performing a single or repeated touch and release action of e.g. a finger or a stylus on the UI, sliding on the touch-sensitive UI, i.e. the user performing a touch and slide movement of e.g. a finger or stylus on the UI without releasing the finger or stylus from the UI, etc.
The touch-sensitive UI may for example be based on capacitive touch sensing or resistive touch sensing.
According to an exemplifying embodiment of the present invention, the touch-sensitive UI may further comprise a light guide, and the at least one discontinuity-indicating element may comprise one or more of: a slit, a hole, a light-blocking structure and a colored region arranged in the light guide.
Such configurations provide relatively easily implemented and relatively inexpensive means for achieving the function of the discontinuity-forming element, as has been discussed above.
According to another exemplifying embodiment of the present invention, the control device may further comprise an audio feedback unit adapted to output an audio signal in response to the user input, a characteristic of which audio signal may be arranged such that the signal audibly identifies the at least one property. The control device may be adapted, for user input comprising a sliding motion going past a region of the touch-sensitive UI including the step continuity from the one-sided limit from a positive direction of the step discontinuity, L+, in the range of available values representing the at least one property to the one-sided limit from a negative direction of the step discontinuity, L−, in the range of available values representing the at least one property, or vice versa, to deactivate the audio feedback unit and maintain the at least one property at the value corresponding to L+ or at the value corresponding to L−, respectively.
By such a configuration, the user is provided with audible feedback and guidance in operating the control device, particularly suited for when the property is such that it can be represented by a range of values delimited by two extreme values, e.g. in the form of a minimum and a maximum value, which by means of the audio feedback according to the embodiment may be clearly communicated to the user when the user operates the control device. Also, the audio feedback assures the user that a particular action (user input) has been performed. Furthermore, such a configuration makes it less likely that the represented property, during operation thereof by means of user input on the UI, undergoes sharp jumps, i.e. goes abruptly from one extreme value to a second extreme value of the represented property, which may be visually disturbing for individuals who at the time of such a jump are in the vicinity of the light source.
In the context of the present invention, by the term “audio signal” it is meant a signal, sound, alert or the like, audible for humans.
According to yet another exemplifying embodiment of the present invention, L+ and L− may comprise two extreme values of the at least one property.
According to yet another exemplifying embodiment of the present invention, the audio signal may be adapted to identify the at least one property by means of a particular type of sound, such as a click, beep or tick sound, in terms of signal pitch, in terms of signal volume, or a combination thereof.
In this manner, the audio feedback guides a user operating the control device by means of an audio signal that may be unique for each property. In other words, the particular type of audio signal may be recognized by the user as being associated with a certain property. A change in the choice of which property is being represented on the UI may thus render a change of audio signal in order to indicate to a user operating the control device that the property currently represented on the UI has changed.
According to yet another exemplifying embodiment of the present invention, the control device may further comprise a plurality of activation areas. Each activation area may be associated with at least one of the properties and is adapted, when activated, to cause the control device to enable the user to control, via the touch-sensitive UI, the property associated with the activation area.
By such a configuration, there is provided a control device for controlling properties of light in various applications that is consistent in behavior and user interaction principles with regards to representing several controllable properties on a single UI. Thus, the control device may comprise a single UI for controlling all of the different controllable properties, where each property may be controlled by the user via user input on the UI using the same user interaction principles as for the other properties. In this way, the user-intuitiveness of the control device may be increased. Furthermore, such a control device is easy to operate as it is clear at all times what the user can control (and what the user cannot control, which is not always the case for prior art control devices).
According to an exemplary embodiment of the present invention, the activation areas of the control device may be configured to be touch-sensitive, or in other words, the activation areas may be configured to be activated by user input without movement of parts or portions in the activation area of the control device, e.g. based on capacitive touch sensing or resistive touch sensing. Alternatively, the activation areas may be configured to be activated by user input by means of a mechanical arrangement such as a hard key or button that may be pressed or depressed by a user, or any other suitable mechanical arrangement adapted to be activated by a user to cause the control device to enable the user to control the property associated with the activated activation area with the touch-sensitive UI. In the following, though an activation area may be referred to specifically as being touch-sensitive, is not meant to limit the activation area to be touch-sensitive but the activation area may alternatively comprise a mechanical arrangement such as described in the foregoing.
According to yet another exemplifying embodiment of the present invention, the control device may further comprise a UI visual appearance variation unit adapted to adjust the visual appearance of the touch-sensitive UI. Each activation area may be further configured, when activated, to cause the UI visual appearance variation unit to adapt the visual appearance of the touch-sensitive UI to a particular visual appearance associated with the respective activated property.
By such a configuration, the user may be provided with visual information associated with the currently activated property. This may be used to even further facilitate providing indications to the user what the user can control and what the user cannot control, which in turn leads to an increasingly user-intuitive control device.
According to yet another exemplifying embodiment of the present invention, the control device may further comprise a UI visual appearance variation unit adapted to adjust the visual appearance of the touch-sensitive UI. The UI visual appearance unit may comprise a light guide and a plurality of light-emitting elements arranged in proximity of said light guide. The UI visual appearance variation unit may be adapted such that changes in operation of the light-emitting elements causes changes in the visual appearance of said touch-sensitive user interface.
By such a configuration, there is achieved a control device that is relatively inexpensive with regards to manufacturing and flexible with regards to capacity requirements. Furthermore, such a control device provides a flexible and versatile UI visual appearance unit with regards to operation thereof and the manner in which the visual appearance of the touch-sensitive UI may be varied. For example, by such a configuration the touch-sensitive UI may be provided with an adaptive visual appearance having varying colors and/or forming various patterns, such as a picture. The resolution of such a picture is in principle only limited by configuration of the light guide and the number of light-emitting elements (e.g. the number of pixels).
The light-emitting elements described with reference to the different exemplifying embodiments of the present description described herein may comprise, but are not limited to, light-emitting diodes (LEDs), which may be of any type and/or emit light of any color.
According to yet another exemplifying embodiment of the present invention, the light-emitting elements may be arranged in a spaced succession forming a continuous loop.
In other words, the light-emitting elements are arranged in a spaced succession where a first light-emitting element and a last light-emitting element of the spaced succession are arranged adjacent to each other.
Such a configuration enables representing a property of light emitted by a light source by a continuous loop (e.g. having a ring or square shape). Such a representation may be ideal for a property that cannot be represented by a range of available values delimited by two extreme values, such as hue. In this way, there is provided a control device that may be adapted to represent both properties that cannot be represented by a range of values delimited by two extreme values and properties that can be represented by a range of values delimited by two extreme values, e.g. in the form of a minimum and a maximum value, in a manner that is clearly communicated to the user.
According to yet another exemplifying embodiment of the present invention, the light guide may be substantially circular and approximately planar. The plurality of light-emitting elements may be circumferentially spaced around the light guide and substantially radially oriented with respect to the light guide.
In this way, the light-emitting elements may emit light substantially radially into the light guide. By such a configuration, there is achieved a control device that is flexible and versatile with regards to capacity requirements and/or operation of the touch-sensitive UI.
According to an exemplifying embodiment of the present invention, at least two adjacent light-emitting elements may be arranged such that the spacing between the two adjacent light-emitting elements is less than the spacing between other adjacent light-emitting elements of the plurality of light-emitting elements.
According to another exemplifying embodiment of the present invention, the at least two adjacent light-emitting elements are arranged in close proximity of the at least one discontinuity-indicating element.
By such configurations, there is enabled relatively easily implemented manners for, e.g., increasing the visual contrast at a hard transition in a range of values indicated on the UI.
According to yet another exemplifying embodiment of the present invention, the touch-sensitive UI is further adapted to visually indicate a subrange of the range of available values representing the at least one property.
Such a configuration for example enables a user to “zoom in” on the range of available values representing the at least one property, or in other words, to visually focus on a subrange of the range of available values representing the at least one property, thereby enabling the user to tune the property more finely, e.g. by enabling the user to adjust, by the user input on the UI, the represented property in finer increments (i.e. finetuning the represented property). Such a configuration may be especially advantageous for controlling, e.g., the hue of light emitted by the light source.
According to yet another exemplifying embodiment of the present invention, the control device may further comprise a memory unit adapted to store data. The touch-sensitive UI may be further adapted to enable a user to select one or more preset values previously stored on the memory unit, the preset values representing predetermined settings of one or more of the properties.
A configuration according to the embodiment described immediately above enables the user to store preset values for the properties, which preset values may be retrieved even after the control device and/or the light source has been powered off and subsequently been powered on, consequently increasing the versatility of the control device with regards to operation.
The memory unit may comprise a non-volatile memory such as a read-only memory (ROM) or a flash memory.
According to yet another exemplifying embodiment of the present invention, the control device may further comprise a proximity sensor adapted to sense proximity of an object within a predetermined distance from the control device.
Alternatively or optionally, the proximity sensor may be adapted to sense proximity of an object within a predetermined distance from an activation area of the plurality of activation areas and/or within a predetermined distance from the touch-sensitive UI.
Such configurations enable the control device going from an idle mode (powersaving) to an active mode (ready for user input) when an object within a certain proximity is sensed and/or enable the control device to switch to an idle mode if no object within a certain proximity is sensed. This may be effectuated by the proximity sensor, or another suitable component, actuated by the proximity sensor. Thus, the energy consumption of the control device may be reduced inbetween periods of ordinary use of the control device (when the control device is in an active state). When proximity is detected, the activation (comprising power-on, calibration, etc.) of the components of the control device may be initiated. The proximity sensor may be adapted to sense proximity of the object with a predetermined sensing rate. The proximity sensor may for example be based on capacitive touch sensing or resistive touch sensing.
In addition to power saving, such configurations may be used to provide the user with a visual signal (e.g. by lighting up the UI) at the activation of the control device indicating to the user that the control device is ready for use.
Further objects and advantages of the present invention will be described below by means of exemplifying embodiments.
Exemplifying embodiments of the invention will be described below with reference to the accompanying drawings, in which:
In the accompanying drawings, the same reference numerals denote the same or similar elements throughout the views.
The following is a description of exemplifying embodiments in accordance with the present invention. It is to be understood that the following description is non-limiting and for the purpose of describing the principles of the invention.
Referring to
Referring now to
Thus, with reference to
Referring to
The control device may further comprise an on button 4a and an off button 4b for powering up and powering down the control device 1, respectively. The control device 1 may also comprise a front housing 5, which in turn may comprise the UI 3, in accordance with the illustrated embodiment, for enabling interaction with a user.
With further reference to
Still referring to
Referring now to
With reference to
With reference to
Further referring to
Referring now to
With reference to
Referring to
According to the exemplifying illustrated embodiment, the light-emitting elements 20a, 20b are circumferentially spaced around the light guide 8 with a spacing that is substantially constant. It is emphasized that
The distances between the circumferentially spaced light-emitting elements 20a, 20b need not be the same all around the light guide 8. On the contrary, at least two adjacent light-emitting elements 20b′, 20b″ may be arranged such that the spacing between the two adjacent light-emitting elements 20b′, 20b″ is less than the spacing between other adjacent light-emitting elements of the plurality of light-emitting elements. Such a configuration is shown at the bottom of the light guide 8 in
According to the illustrated embodiment in
The light guide 8 may further comprise a light blocking structure 22, or barrier, between or otherwise being in proximity of a pair of adjacent light-emitting elements 20b′, 20b″ as described in the paragraph immediately above, the light-blocking structure 22 being adapted to substantially block light emitted by light-emitting elements, for further controlling the visual characteristics in proximity of the hard transition.
Though the embodiments of the present invention described with reference to
Referring now to
With reference to
With further reference to
A memory unit 24 and/or proximity sensor 25 as have been described with reference to
Referring now to
With reference to
To further clarify, the user input situations referenced to as “S1” and “S2” in the foregoing are illustrated by means of
In conclusion, the present invention relates to a control device adapted to control properties of light emitted from a light source. The control device may comprise a touch-sensitive user interface adapted to visually indicate a range of available values representing at least one of the properties and to enable a user to control the represented property on the basis of a location touched on the touch-sensitive user interface. The controlled property may be adjusted by means of a communication unit adapted to communicate to the light source control signals corresponding to user input. The user interface may comprise at least one discontinuity-indicating element adapted to visually indicate a step discontinuity in the range of available values representing the at least one property.
Although exemplary embodiments of the present invention has been described herein, it should be apparent to those having ordinary skill in the art that a number of changes, modifications or alterations to the invention as described herein may be made. Thus, the above description of the invention and the accompanying drawings are to be regarded as non-limiting examples of the invention and the scope of protection is defined by the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 09160103 | May 2009 | EP | regional |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/IB2010/052041 | 5/10/2010 | WO | 00 | 1/27/2012 |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2010/131179 | 11/18/2010 | WO | A |
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