Active Camera Lens System Filters

Abstract

The electronic camera filter comprises an electronic display configured for use with a camera system to provide different levels of image filtering for a path to the camera as a neutral density filter. The electronic display is programmable and can be calibrated to provide different desired filter levels associated with different settings of the camera lens iris, focus, zoom, or light meter measurement. The electronic display may be manually calibrated or may be calibrated by calibration information stored in the electronic display memory or otherwise downloaded. The ability to program and calibrate filter level settings allows the electronic display to operate in synchronization with the camera lens iris, focus, zoom, or light meter to provide a desired combined or synergistic optical characteristic. The electronic display may be controlled to provide synchronized operation by the same controller used to control the camera lens iris, focus, and / or zoom.

Description

[Technical field]

[0001] (Related Applications) This patent application claims priority to and from U.S. patent application 17 / 537,456, filed November 29, 2021, which is a continuation-in-part of U.S. patent application 17,534,318, filed November 23, 2021, which is a continuation-in-part of U.S. patent application 16 / 381,433, filed April 11, 2019 (now U.S. Patent No. 11,184,510), which claims the benefit of U.S. Provisional Application No. 62 / 657,574, filed April 13, 2018, all of which are incorporated by reference in their entireties herein. [Background technology]

[0002] (background) Camera filters are used to reduce the amount of light entering a camera or to produce other optical effects (such as changing the color of the image). These filters must be changed manually to change the optical effect produced by the filter. In film production, filters cannot be changed manually during filming, and the effort required to change filters between takes can add to the cost of film production. For example, if the camera is mounted on a high crane, the crane must be lowered to manually change the filters.

[0003] Also, in film production, the level or amount of filtering required for a particular shot may vary depending on the particular settings of the camera or lens, which may include, but are not limited to, the aperture or iris setting of the camera lens, the zoom setting of the camera lens, the focus setting of the camera lens, and / or the lighting surrounding the camera or the subject being photographed. Thus, changing these settings often leads a user to change filters to accommodate such changes in settings.

[0004] Therefore, there is a need for a more efficient method of varying the filtering of a camera without the need to manually change filters.Furthermore, there is a need for a more efficient method of changing the filtering level of a camera without the need to manually change filters because it allows for filtering changes based on changes made to one or more camera system or camera lens settings during use. Summary of the Invention

[0005] (overview) The present disclosure addresses the above needs by providing an electronic display that is configured to be matched, paired, or calibrated with a camera system, or a camera lens, or an object associated with the camera, such as a light meter, and, for example, when functioning as a neutral density filter, provides such calibrated filter levels when changes are made to the camera system, lens system, or object associated with the camera, thereby providing synchronized operation between the electronic display and the camera system, lens system, or object associated with the camera.

[0006] In one example, the electronic display disclosed herein is configured to be attached to a camera lens system and configured to filter an image passing to the camera. In one example, the filter is attached to the object side of the camera lens system. In one example, the filter may be interposed between the camera and the camera lens system, or between different elements of the camera lens system, or may be interposed within the camera. In one example, the filter may be coupled to the camera system between the camera lens and an image receiver of the camera system. In one example, the electronic display comprises a filter level setting calibrated, such as by user programming, to at least one of an iris T aperture setting of the camera lens, a focus setting of the camera lens, a zoom setting of the camera lens, and an exposure measurement of a light meter. In one example, the electronic display comprises a controller configured to electrically control the filtering of the electronic display. The electronic display also comprises a receiving means for receiving a control signal for controlling the controller. In one example, the receiving means comprises a wireless signal receiver. In one example, the receiving means comprises a serial input port for receiving the control signal by a cable connection thereto.

[0007] In one example, the electronic display is configured to operate in synchronization with the operation of at least one of a camera lens iris, a camera lens focus, a camera lens zoom, and a light meter, and to change the filter settings to the calibrated settings based on at least one of a different iris T stop setting, a different focus setting, a different zoom setting, and a different exposure measurement according to the respective calibrated filter settings. In this manner, once the filter levels of the electronic display are calibrated to different camera lens element or object settings, the electronic display and the camera lens element or object can operate in synchronization with the electronic display providing calibrated filter levels matched to the different camera lens element or object settings.

[0008] In one example, the electronic display includes liquid crystals therein for filtering the image. In such an example, the electronic display is a neutral density filter, and the filter settings to be calibrated are different neutral density levels. In one example, the electronic display includes one or more organic light emitting diodes therein for filtering the image. In one example, the electronic display includes a housing coupled thereto, and the controller and the receiving means are disposed within the housing. In one example, the housing forms at least a portion of a frame for the electronic display. In one example, the electronic display is configured to detachably couple to a matte box for coupling to a camera lens. Alternatively, the electronic display may include a housing configured to be coupled or mounted between different camera lens elements or sections, between a camera lens and a camera (e.g., behind the lens, or within / inside the camera).

[0009] In one example, the filter setting of the electronic display is calibrated to the iris T aperture setting of the camera lens, and the electronic display operates in synchronization with the iris of the camera lens. In one example, the filter setting of the electronic display is calibrated to the focus setting of the camera lens, and the electronic display operates in synchronization with the focus of the camera lens. In one example, the filter setting of the electronic display is calibrated to the zoom setting of the camera lens, and the electronic display operates in synchronization with the zoom of the camera lens. In one example, the filter setting of the electronic display is calibrated to the iris setting of the camera lens, and the electronic display operates in synchronization with the iris of the camera lens, and the iris of the camera lens operates in synchronization with the focus of the camera lens. In one example, the electronic display is calibrated with any one of the iris, focus, and zoom, and operates in synchronization with the iris, focus, and zoom that are calibrated, but the other one or more of the iris, focus, and zoom that are not calibrated with the electronic display may operate in synchronization with the calibrated lens element. In one example, the filter settings of the electronic display are calibrated to the exposure measurements of the light meter, and the electronic display operates in sync with the light meter.

[0010] In one example, an electronic display includes a first portion and a second portion, both of which are configured to pass light, and a controller is configured to electronically control filtering of the electronic display such that the first portion filters an image at the same time that the second portion does not filter the image. In one example, the controller is configured to electronically control filtering of the electronic display such that the second portion filters an image at the same time that the first portion does not filter the image.

[0011] In one example, the electronic display filters light for an image of a camera system by calibrating the filter settings of the electronic display with at least one of the iris T aperture setting of the camera lens, the focus setting of the camera lens, the zoom setting of the camera lens, and the exposure measurement of a light meter. In one example, the electronic display includes liquid crystals that are electronically controlled to filter light, allowing the electronic display to act as a variable neutral density filter. In one example, the calibration step may be performed using user input on the electronic display or by pre-programmed calibration settings that are stored in or downloaded to the memory of the electronic display. In one example, the electronic display device may include calibrated pre-set filter levels or may include a range of calibrated unset filter levels. In one example, the electronic display may include a current filter level that can be fine-tuned or changed as needed to correspond to a particular filter level desired during calibration. Once the calibration step has been performed, the electronic display can be controlled to operate in synchronization with the iris, focus, zoom, or light meter to provide the calibrated filter level by changing the iris, focus, zoom, or light meter to provide a desired degree of filtering for the image path to the camera. In one example, the user controller facilitates synchronous operation of the electronic display with at least one of the camera lens iris, the camera lens focus, the camera lens zoom, and the light meter.

[0012] When configured in this manner, the electronic display provides a desired level of performance (e.g., optical filtering) that can be calibrated and fine-tuned for specific changes in camera lens element settings or ancillary camera system objects, facilitating synchronous operation of the electronic display with the calibrated camera lens elements or ancillary objects, thereby avoiding the need to replace filters during changes in camera lens settings or the need to manually change filter settings during changes in camera lens settings, improving operational flexibility and camera operation efficiency. Furthermore, the ability to provide desired calibrated levels of optical filtering in association with changed camera lens settings provides in situ desired combinations or synergistic optical properties that would not otherwise be possible or readily available, thereby greatly expanding the range of optical properties available to users of camera systems that include such functionality. [Brief description of the drawings]

[0013] BRIEF DESCRIPTION OF THE DRAWINGS It will be appreciated that a better understanding of the features and advantages of the systems, apparatus, and methods disclosed herein will be obtained with reference to the specification, claims, and accompanying drawings.

[0014] [Figure 1] FIG. 2 illustrates a front view of a filter according to an embodiment of the present disclosure.

[0015] [Diagram 2] 2 shows a front view of the filter shown in FIG. 1 with different filtering than the filter shown in FIG. 1.

[0016] [Diagram 3] 2 shows a front view of the filter shown in FIG. 1 with different filtering than the filter shown in FIG. 1.

[0017] [Figure 4] 1 illustrates a front view of a control interface of a control terminal according to an embodiment of the present disclosure.

[0018] [Diagram 5] 5A, 5B, and 5C each show a close-up view of an input according to an embodiment of the present disclosure.

[0019] [Figure 6A] FIG. 1 illustrates a front exploded perspective view of a portion of a liquid crystal based electronic display according to an embodiment of the present disclosure.

[0020] [Figure 6B] 1 illustrates a front exploded perspective view of a portion of an organic light emitting diode-based electronic display according to an embodiment of the present disclosure.

[0021] [Figure 6C] FIG. 2 is a front view of a liquid crystal based electronic display according to an embodiment of the present disclosure, showing the liquid crystal in one operational state.

[0022] [Figure 6D] 6D is the electronic display of FIG. 6C utilizing liquid crystals according to an embodiment of the present disclosure, showing the liquid crystals in a second operating state.

[0023] [Figure 7A] FIG. 1 illustrates a front perspective view of an electronic display that performs filtering in accordance with an embodiment of the present disclosure.

[0024] [Figure 7B] FIG. 1 illustrates a front perspective view of an electronic display that performs filtering in accordance with an embodiment of the present disclosure.

[0025] [Figure 7C] FIG. 2 illustrates a front perspective view of a liquid crystal panel utilized in combination with one or more organic light emitting diode panels, according to an embodiment of the present disclosure.

[0026] [Figure 8] FIG. 1 illustrates a side view of a camera system according to an embodiment of the present disclosure.

[0027] [Figure 9] FIG. 1 illustrates a front perspective view of a camera system according to an embodiment of the present disclosure.

[0028] [Figure 10] FIG. 1 illustrates a side view of a camera system according to an embodiment of the present disclosure.

[0029] [Figure 11] 1 illustrates a close-up view of an electronic display for use in combination with a mobile device camera according to an embodiment of the present disclosure.

[0030] [Figure 12] 1 shows a partial perspective view of an exemplary electronic display disclosed herein.

[0031] [Figure 13] FIG. 1 shows a schematic diagram of an exemplary camera system including an exemplary electronic display disclosed herein operated by an exemplary user controller.

[0032] [Figure 14] 1 shows a schematic diagram of an exemplary camera system including an exemplary electronic display disclosed herein used in conjunction with an exemplary light meter. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] (Detailed Description) 1 illustrates a front view of a filter 10 according to an embodiment of the present disclosure. Filter 10 is preferably for use with a camera lens as part of a camera system. Filter 10 may include an electronic display 12 and may include a housing 14. Filter 10 may include a controller 16, a power source 18, and an input 20.

[0034] Electronic display 12 may be transparent (optically light transmissive) and may transmit visible light. Electronic display 12 may be configured such that filtering of electronic display 12 is electronically controlled. Electronic display 12 may be configured to filter an image of the object side of electronic display 12 for a camera lens. Filtering may be done in a variety of ways and may include reducing the amount of light transmitted through electronic display 12, changing the color of the light transmitted through electronic display 12, or changing the properties of the transmitted light. For example, filtering may produce a variety of effects by filtering the image of the object side of electronic display 12 by diffusing the light transmitted through electronic display 12 or spreading the light transmitted through electronic display 12 in various directions. Filtering may be done by emitting light from electronic display 12 that displays an image of the object side of electronic display 12 superimposed thereon. The emitted light may change the color or amount (intensity) of light received by the camera lens.

[0035] The electronic display 12 may include one or more pixels (shown as 22 in FIG. 6A and 24 in FIG. 6B). If multiple pixels are used, an array of pixels may be provided. In other embodiments, a single pixel (or a 1×1 pixel array) may be used. The electronic display 12 may use liquid crystals contained in the electronic display 12 to filter the image. The electronic display 12 may also use organic light emitting diodes contained in the electronic display 12 to filter the image. In other embodiments, other forms of electronic displays may be used. For example, electronic displays as disclosed herein may use quantum dots, etc. It will be understood that all forms of electronic technology capable of being adjusted for the purpose of filtering images for use with a camera are within the scope of the electronic display as disclosed herein.

[0036] Electronic display 12 may have a front side 26 and a back side (opposite the front side), and may include one or more side surfaces 28. Four sides are shown in FIG. 1 . Housing 14 may be disposed on one side of electronic display 12 and form a boundary for filter 10. In one embodiment, the boundary may extend all around electronic display 12 and form a frame for electronic display 12. Housing 14 may form part of a frame, which may extend around all or a portion of electronic display 12.

[0037] The filter 10 may be sized to fit into a standard filter slot in a matte box. The filter 10 may be sized for a camera or for a cinematography camera. The filter 10 may have a rectangular shape. In one embodiment, the filter 10 may measure approximately 4 inches in a vertical dimension and approximately 5.65 inches in a horizontal dimension. In one embodiment, the filter 10 may measure approximately 6 inches in a vertical dimension and approximately 6 inches in a horizontal dimension. The filter 10 may measure approximately 4 millimeters thick. In other embodiments, the size of the filter 10 may vary. In one embodiment, the filter 10 may be configured to measure no more than 7 inches in a horizontal or vertical dimension. In one embodiment, the filter 10 may be configured to measure no more than 6.5 inches in a horizontal or vertical dimension. In one embodiment, the filter 10 may be configured to measure no more than 10 millimeters thick. In one embodiment, electronic display 12 may have a horizontal or vertical dimension not exceeding 7 inches, or may have a horizontal or vertical dimension not exceeding 6.5 inches. In one embodiment, electronic display 12 may have a horizontal or vertical dimension not exceeding 140 millimeters. The size of filter 10 and electronic display 12 is preferably set with respect to the size of a camera lens such that filter 10 can be used with the camera lens, it being understood that the size will vary depending on the particular type of camera and camera application.

[0038] In one embodiment, the shape of filter 10 and electronic display 12 may vary from that shown in Figure 1. For example, other shapes such as round, circular, square, etc. may be utilized. For example, filter 10 and electronic display 12 may be configured to be mounted between a camera lens element, between a camera lens and a camera, or within a camera.

[0039] The electronic display 12 forms part of the filter 10 through which light passes. The housing 14 and other electrical components of the filter 10 are preferably located outside the field of view opening of the filter 10 so that the housing 14 and other electrical components do not obstruct the view of the image captured by the camera lens. However, in other embodiments, the housing 14 and electrical components may be within the field of view opening. For example, the housing 14 and / or electrical components may be transparent so that their presence does not obstruct the view of the image.

[0040] The controller 16 may be used to electrically control the filtering of the electronic display 12. The controller 16 may be electrically coupled to the electronic display 12. The controller 16 may include a microprocessor or the like for controlling the filtering of the electronic display 12. The controller 16 may electrically control the filtering by changing a characteristic of the electronic display 12. For example, the controller 16 may change the amount of light transmitted through the electronic display 12, may change the color of the light, or may emit light from the electronic display 12 that changes the image. It will be appreciated that the controller may be configured differently to be useful for changing one or more characteristics of the electronic display depending on the particular type of electronic technology being used. In the embodiment shown in FIG. 1, the controller 16 may be located within the housing 14. However, in other embodiments, the controller 16 may be located separately from the electronic display 12. For example, the controller may be part of a lens system and may be attached to the electronic display 12 when the electronic display 12 is coupled to the lens system. The controller 16 may also be located remotely from the lens system or may be in communication with the electronic display 12 to control the display 12. Controller 16 may be electrically connected to electronic display 12 through electrical circuitry (not shown). The electrical circuitry may be transparent so as not to be reflected in images passed through electronic display 12.

[0041] A power source 18 may be used to power the electrical components of the filter 10. The power source may be located within the housing 14, as shown in FIG. 1, or in other embodiments, may be located remotely from the filter 10. For example, the power source 18 may be part of the lens system and may be attached to the filter 10 when the filter 10 is coupled to the lens system. In other embodiments, the power source 18 may be located remotely from the lens system. The power source 18 may comprise a battery, a capacitor, a solar cell, an AC or DC power source, a plug for receiving external energy, or other forms of power. In one embodiment, the power source 18 may comprise an inductive receiver (such as an inductive coil or other form of receiver) for receiving inductive energy from an inductive transmitter (such as an inductive coil or other form of transmitter). The inductive receiver may be located in proximity to the inductive transmitter and may wirelessly receive energy to power the filter 10 or to charge a battery or other power storage device of the filter 10. In one embodiment, the power source 18 may be located within the viewing aperture of the electronic display 12, for example in an embodiment in which the power source 18 is transparent.

[0042] The input 20 may be for receiving controls to control the controller 16. The input 20 may be located within the housing 14 as shown in FIG. 1, or may be located remotely from the housing 14, similar to the controller 16 or the power source 18. For example, the input 20 may be part of the lens system and may be attached to the filter 10 when the filter 10 is coupled to the lens system. In other embodiments, the input 20 may be located remotely from the lens system. The input 20 may comprise a wireless signal receiver. The input 20 may be operative to receive wireless signals via Wi-Fi, Bluetooth, peer-to-peer connections, cellular connections, wireless connections, or other forms of wireless signal communication. In one embodiment, the input 20 may comprise a wired connection that physically connects to receive controls. For example, the wired connection may allow an operator of the camera system to control the electronic display 12. The wired connection may comprise a wired connection, such as a plug, that receives controls. In one embodiment, the input 20 may comprise a manual input (such as a knob, button, slider, or other form of input) that allows a user to provide control. Other forms of input 20 may also be utilized. The controls received by input 20 can have a variety of forms and may consist of control signals, manual inputs, or other forms of control. The controls may be provided wirelessly (or via a wired connection). The controls may be commands for controlling controller 16.

[0043] The input 20 may be connected to a control terminal 30. The control terminal 30 may constitute a remote terminal that communicates wirelessly with the input 20. The control terminal 30 may be configured to transmit controls to the input 20 and to receive information about the state of the filter 10 from the input 20. In this way, the input 20 may constitute a transmitter as well as a receiver. In one embodiment, the control terminal 30 may communicate with the input 20 via a wired connection. The control terminal 30 may consist of a computer, a tablet, a smartphone, etc., or may consist of other forms of terminal devices. The control terminal 30 may constitute a controller dedicated to the filter 10. The control terminal 30 may be, for example, part of a lens system or a camera system in which the filter 10 is utilized.

[0044] The control terminal 30 may be utilized to set or control the filtering of the electronic display 12. The control terminal 30 may have a control interface utilized by a user to set or control the filtering of the electronic display 12. For example, the control interface may be part of a software application (or "app") used to set or control the filtering of the electronic display 12. The control interface may also display information received regarding the status of the filter 10. FIG. 4 illustrates the control terminal 30, for example, in the form of a tablet. The display 31 may display images received by the camera. The control terminal 30 may utilize a control interface in the form of a touch screen. The control interface may include interface controls 33, such as touch sliders, that can change the color, brightness, or other form of filtering of the filter 10. In one embodiment, the user may touch a particular portion of the control interface to indicate a location of the image where filtering should be performed. For example, the user may select to change the filtering of only the clouds, such as by encircling or touching the clouds 34. The user may select the entire image or a portion of the image to perform filtering or to perform a different type of filtering. Other forms of control interfaces and interface controls 33 may be utilized.

[0045] In one example, the electronic display is a camera system, a camera lens, or a reprogrammable electronic display configured for use with a camera lens system. The electronic display is configured to be used and placed in front of the camera lens (i.e., in front of the lens configuration), but as described below, the electronic display disclosed herein may be configured as an intermediate image of a relay system or any non-sequential optical system in which the light path is diverted from the sequential cycle. It should therefore be understood that the electronic display disclosed herein may alternatively be used behind the camera lens, for example, interposed in the camera lens system or interposed between the camera lens system and the camera.

[0046] In other embodiments, other forms of software may be used to set or control the filtering of electronic display 12. Other control interfaces may be utilized. For example, a standard keypad or a series of buttons or knobs may be utilized as the control interface. A user may set the desired properties of the filtering of the electronic display or, along with other forms of control, may select the variable filtering sequence that electronic display 12 will perform.

[0047] 5A-5C show other forms of input that may be utilized in the filters disclosed herein. In FIG. 5A, an input 35 in the form of one or more buttons may be provided on the body of the filter. A user may press a button to cause the input 35 to receive a control input for controlling the controller or for programming the filter. In FIG. 5B, an input 37 in the form of a slider may be provided on the body of the filter. In one example, the filter may include a single button, a series of buttons, and / or a slider or scroll wheel that allows the user to adjust or fine-tune the level of filtering, for example when configured to function as a neutral density filter. In one example, the electronic display may be programmed to have preset filtering levels. In one example, the electronic display may have six preset filtering levels accessible by such user input. In one example, the levels are ND 0.3, ND 0.6, ND 0.9, ND 1.2, ND 1.5, and ND 1.8. Although a particular pre-set filtering level as a neutral density filter is provided, it is understood that an electronic display as disclosed herein may be configured to provide a number of pre-set filtering levels other than six, and the filtering level associated with each pre-set may differ from the example provided. Additionally, although pre-set filtering levels are disclosed, it is understood that an electronic display may be programmed or configured to provide scaled, gradient, or gradual filtering levels, with the purpose of providing a user with a completely customized level of filtering fine-tuned for each particular camera use or shot, instead of gradual changes between pre-set or fixed filtering levels.Referring to FIG. 12, in one example, the electronic display 100 may include both buttons 102 and 104 as a user interface (as described above) to provide stepped or gradient level filtering to allow for greater control to provide custom filtering levels and / or fine tuning of filtering levels, as well as a scroll wheel 106 to allow for stepped or gradient level filtering to allow for finer adjustment of the degree of filtering levels desired. A user may slide a slider to cause an input 37 to receive a control for controlling the controller. In FIG. 5C, an input in the form of a cord 39 coupled to a control terminal 41 may be coupled to the filter. The cord 39 may be removably inserted into an input of the electronic display, such as a serial input. A user may input a control via the control terminal 41 for controlling the controller and / or the operation of the filter.

[0048] In one example, the electronic display is configured with an on-board processor and memory (not shown) that may be reprogrammable for the purpose of adapting the electronic display to allow for use with different types of lenses and / or cameras and / or to allow the electronic display to function differently with the same camera and / or lens as required for a particular filming or filming environment. In one example, the electronic display may be configured to be reprogrammed by user input to the electronic display itself, and this may be performed wirelessly or by a wired electronic connection through a connection port, such as a serial port, on the electronic display. With reference to FIG. 12, an exemplary electronic display 100 includes an inlet port 108 (e.g., a serial inlet port) configured to accommodate connection with a cable or the like to program the electronic display, to operate the electronic display (e.g., to change the filtering level generated by the electronic display), and / or to power the electronic display from a suitable power source. In one example, it is desired for the electronic display to have a serial port connection 108 configured to allow the electronic display to be remotely controlled and / or reprogrammed and / or powered. In one example, the electronic display is configured to be reprogrammable as described above and configured to facilitate use with any suitable system that generates a serial output for purposes of controlling the electronic display, including but not limited to wirelessly injecting commands / transmissions into the electronic display using an external dongle or the like that interfaces with a serial port.

[0049] In one example, the electronic display processor and memory may include a boot loader or the like configured to allow reprogramming of the electronic display in the field to program custom software that adapts the electronic display for use in a particular shoot. In such an example, the electronic display can then be reprogrammed in the field with default software. When configured in this manner, providing the ability to be reprogrammed in the field with custom software greatly expands the adaptability and flexibility of the electronic display to accommodate a variety of camera use applications (again, without the need to switch or remove the electronic display from connection with the camera).

[0050] In one embodiment, the electronic display may be operated by being coupled to a lens controller of a camera system. For example, if useful or desired, the input may be configured such that the filtering of the electronic display changes in response to changes in the iris, focus, zoom, or other optical characteristics of the camera lens, or in lighting conditions near the camera or subject. This may occur through a corded connection or other form of connection (e.g., wireless communication, etc.) with the lens controller of the camera system or the like.

[0051] Electronic display synchronized to camera lens iris- In one embodiment, the electronic display can be configured to vary the degree of filtering in response to changes in the iris of the camera lens. In such an embodiment, the electronic display is synchronized to the iris such that movement of the iris produces a desired change in the degree of filtering provided by the electronic display. In one example, movement of the iris and associated electronic display can be wirelessly controlled by a handheld control device or controller, such as a Preston MDR-3 focus / iris controller (shown in FIG. 13). It should be understood that while a particular type of camera lens control device is disclosed, other types of control devices can also be used. In one example, the controller can be configured to operate the electronic display separately from the iris, and can be configured to control the electronic display to be synchronized with the iris by control commands sent to the iris and electronic display, e.g., the iris and electronic display are operated on the same control channel of the controller.

[0052] In one example, when the electronic filter functions as a neutral density filter that changes in synchronism with the iris change, it is desired that the electronic display be specifically programmed to match different T aperture settings of the iris with the desired ND levels, thereby providing depth of field (DF) lamp mode settings that match the different iris settings. In one example, the default programmable electronic display settings for calibration with iris aperture settings are five consecutive neutral density settings. In such an example, the neutral density settings start with ND 0.6. The values ​​are ND 0.6 (2 stops), ND 0.9 (3 stops), ND 1.2 (4 stops), ND 1.5 (5 stops), and ND 1.8 (6 stops). In one example, these neutral density values ​​are matched by the user to the desired aperture settings of the iris. The user matches these to maintain a constant level of exposure throughout the range of iris aperture settings. This allows the depth of field to be varied from shallow (small iris aperture) to large (large aperture) by varying the iris aperture while maintaining a constant level of exposure (by synchronous operation of the electronic display).

[0053] To calibrate the electronic display with the camera lens iris, the neutral density setting of the existing electronic display is changed by erasing the default or previously saved setting, which can be done by a user entering into the electronic display by pressing a button or the like. With reference to FIG. 12, in one example, the default electronic display setting is erased by a user holding down the inward arrow button 102 for a period of time (e.g., about 3 seconds) while the electronic display 100 is in normal mode. In one example, the electronic display has a visual indicator, for example, in the form of one or more lights 110. Once the default electronic display setting has been erased, for example, after 3 seconds, the one or more lights 110 go dark to indicate that the erasure is complete. In one example, the visual indicator is in the form of one or more LEDs on the electronic display.

[0054] Once the default electronic display settings or DF lamp mode is cleared, the electronic display is ready for the settings to be entered by the user (during a calibration, pairing, or matching process) for the purpose of programming the DF lamp mode into the iris. In one example, the electronic display is placed into a setting programming mode, i.e., DF lamp mode, by the user holding down the outer arrow button 104 on the electronic display for a period of time. In one example, the outer arrow button is held down until the electronic display visually indicates that it has entered the DF lamp mode. In one example, the period is about 3 seconds, and the visual indication is the illumination of one or more lights 110 on the electronic display. In one example, the one or more lights are LED indicators that emit a teal light color indicating that the DF lamp mode has been entered. Once in the electronic display programming mode, the electronic display can be programmed to calibrate, match, or pair different states of the lens iris (i.e., T aperture settings) and neutral density levels.

[0055] In one example, the neutral density setting of the electronic display is calibrated, matched, or paired with the iris of the camera / camera lens according to the following method: With the electronic display in a normal mode (e.g., with the default neutral density setting erased and the electronic display not in an enter state), the iris of the camera lens is set to the darkest desired T aperture setting for the neutral density setting or DF pull of the electronic display. In one example, this iris setting is calibrated, matched, or paired with one or more desired neutral density values ​​or levels of the electronic display. In an example where the electronic display is configured to provide a specific fixed number of stops or neutral density settings (e.g., 6 stops), the darkest desired iris T aperture setting may be calibrated, matched, or paired with a 2 stop neutral density (e.g., ND 0.6, respectively). The electronic display then enters programming, i.e., DF lamp mode, and enters the state as described above. In this state, the neutral density setting of the electronic display may be adjusted by user input, for example, by using the wheel 106, to adjust and fine-tune the calibration, matching, or pairing of the neutral density level with a particular iris T aperture setting. In one example, the neutral density setting is accepted by the electronic display by the user pressing the inward arrow button 102, and acceptance is visually confirmed by the flashing of one or more lights 110 on the electronic display. The iris is then set to the next desired T aperture setting, and the electronic display is adjusted as described above to provide another desired level of neutral density. In an example where the electronic display is configured to have pre-set neutral density settings, the user may momentarily press the outward arrow button 104 to move to the next neutral density setting. The neutral density value may be fine-tuned / adjusted to the iris T aperture setting as described above by using the wheel 106, and the desired value may be accepted as described above by pressing the inward arrow button 102 to obtain visual confirmation of acceptance.This process of adjusting the iris to the next T aperture setting and calibrating, matching, or pairing that T aperture setting to the desired neutral density level of the electronic display is repeated until all desired iris T apertures have been calibrated, matched, or paired to the neutral density levels of the electronic display. This is one example of a method for calibrating an electronic display to an iris, facilitating synchronous operation of the two.

[0056] In an example where the electronic display is configured to have six pre-set neutral density levels or values ​​(in the example, each pre-set neutral density level has its own designated light 110), it is desired that the final Iris T Stop setting be no more than 5 stops from the initial T Stop setting because the range of the electronic display neutral density settings is limited to between ND 0.6 and ND 1.8 when the electronic display is in DF lamp mode. If the camera use application or camera user requires an Iris T Stop setting less than 5, then during the calibration process the electronic display neutral density levels may be moved or skipped without moving to a new T Stop setting.

[0057] After the electronic display has been calibrated, matched, or paired with the iris, the iris range can be adjusted if necessary (e.g., if the sun moves in or out of the clouds). As described above, this can be done by placing the electronic device in a programming entry mode, e.g., DF lamp mode. To open the iris range by one stop (e.g., from a range of T11 to T2.8 to a range of T8 to T2), the user may press the outer arrow button 104 on the electronic display once. To close the iris range by one stop (e.g., from a range of T8 to T2 to a range of T11 to T2.8), the user may press the inner arrow button 102 on the electronic display once. To fine-tune the neutral density level to correspond to the adjusted iris range, the user can also move the neutral density level of the electronic filter up or down by moving the wheel 106 between the two arrow buttons.

[0058] Once the desired calibration of the electronic display and iris is complete, the electronic filter programming mode (e.g., DF lamp mode) can be exited and the electronic display returned to normal operation by pressing and holding the outer arrow button 104 on the electronic display for a period of time (e.g., 3 seconds) until the LED light 110 is no longer illuminated. In one example, the electronic display is configured to store the programmed iris calibration neutral density setting (e.g., DF lamp mode setting) in an on-board memory. If the electronic display is powered off, the setting is loaded from memory upon power up. If the electronic display is to be used with a new lens, the calibration procedure is repeated to synchronize the electronic display and iris operation, in which case the user erases the existing calibrated setting associated with the removed lens (as described above) and reprograms, calibrates, matches, or pairs the iris T aperture setting of the new lens to the electronic display neutral density level in the manner described above. Configured in this manner, the electronic display can be programmed to be calibrated for synchronized iris operation with a variety of different camera lenses.

[0059] Although a particular method for calibrating, matching, or pairing the neutral density levels of an electronic display to the Iris T aperture levels of a camera lens is described above, it should be understood that this is just one approach and that other approaches that function in a similar manner to pair or match neutral density levels with Iris T aperture levels are within the scope of the electronic display disclosed herein. For example, an electronic display as disclosed herein may have more than six or less than six pre-set neutral density settings different from those specifically described, and / or may have a continuous gradient of different possible neutral density levels, pre-set or not, and for such embodiments, the process of calibrating, matching, or pairing the Iris T aperture settings to such neutral density levels may include a similar general approach as described, in which the Iris T aperture settings are each calibrated to one or more desired electronic display neutral density levels. In one example, it is desired that as the iris moves from a closed position to a more open position, the paired neutral density level of the electronic display increases, thereby functioning to reduce the amount of light passing through the electronic display to the camera lens.

[0060] As an alternative to the above-described methods for calibrating an iris setting to a neutral density level or setting of an electronic display, an electronic display as disclosed herein may be configured to include a memory having stored therein calibrated iris T-stop settings and associated neutral density levels for different types of lenses. For example, the electronic display may be configured to allow such pre-existing iris calibration information to be loaded or downloaded into the electronic display's memory by well-known techniques. It is to be understood that all such alternative processes for calibrating an electronic display to an iris are intended to be within the scope of the electronic display as disclosed herein.

[0061] In one example, the user controller may be configured as described above to control the electronic display and iris T aperture settings. FIG. 13 shows a camera system 200 including a camera 202 connected with a camera lens iris 204, a camera lens focus 206, a camera lens zoom 208, an electronic display 210, a matte box 212, a user controller 214, a receiver / transmitter or transceiver device 216, and electrical cables 226, 228, 230. In one example, the controller 214 may be configured to transmit control signals using one or more different channels. In one example, if synchronous operation of the electronic display and iris is desired, the electronic display 210 and iris 204 are configured to receive signals from the controller 214 on the same channel, thereby allowing the user to operate the electronic display and iris synchronously by manipulating a single control function or element of the controller. In one example, the controller 214 can enable synchronized operation of the electronic display and iris by moving an iris control element on the controller, which may be in the form of a knob 218, switch 220, slider 222, etc. In one example, the controller 214 transmits a wireless iris control signal 224 on a single channel that is received by the receiver / transmitter device 216. In one example, the receiver / transmitter device 216 is configured to convert the received wireless signal to an electrical signal and direct the electronic control signal via separate cables 228 and 230 to each of the operating mechanisms 232 that move the iris 204 and to a serial input 234 of the electronic display 210 that changes the neutral density level as calibrated to the iris 204.

[0062] Electronic display synchronized with the camera lens focus- In one embodiment, the electronic display can be configured to change the degree of filtering in response to changes in focus of the camera lens. In such an embodiment, the electronic display operates in synchronization with the focusing mechanism such that changes in focus result in desired / calibrated changes in the degree of filtering provided by the electronic display. In one example, the ability to synchronize the electronic display to the focusing operation of the photographic lens operates to compensate for stop losses associated with macro / micro photography. Traditionally, illumination losses incurred in macro / micro photography have been accommodated by manual adjustment of the iris during focus pull-in or ramp. Such traditional methods are not accurate and introduce additional changes in the observed depth of field and out-of-focus characteristics. Thus, synchronizing the operation of the electronic display to the focus is desired because it operates to compensate for aperture losses with much higher resolution when focusing on macro-conjugate objects, keeping the observed depth constant and keeping the out-of-focus characteristics of the captured image constant.

[0063] In one example, the movement of the focus and electronic display may be controlled, e.g., wirelessly, by a handheld controller or control system as described above. In one example, the controller may be used to control the electronic display in synchronization with the focus, e.g., by control signals or commands sent to the focus mechanism if the focus mechanism and electronic display are operated on the same control channel. Although the above method of controlling the movement of the electronic display and focus in synchronization has been disclosed, it should be understood that there are a variety of different ways or approaches to accomplish the same functionality, and all such other ways and approaches are intended to be within the scope of the present disclosure.

[0064] In an example where the electronic display functions as a neutral density filter synchronized to focus changes, it is desired that the electronic display be specifically programmed to modify the neutral value setting (e.g., macro focus mode setting). To calibrate the electronic display with the focus of the camera lens, the neutral density setting (e.g., macro focus mode setting) is changed by erasing the default or previously stored setting, which can be entered by the user into the electronic display by pressing a button or the like. In one example, the neutral density setting of the electronic display is erased in the same manner as described above for calibrating the electronic display 100 with an iris, i.e., by the user holding down the inward arrow button 102 for a period of time (e.g., about 3 seconds) while the electronic display is in normal mode. In one example, the electronic display has a visual indicator, for example in the form of one or more lights 110. When the neutral density setting (e.g., macro focus mode setting) is erased, for example after 3 seconds, the one or more lights go dark to indicate that the erasure is complete. In one example, the visual indicator is in the form of one or more LEDs on the electronic display.

[0065] Once the default or previous neutral density setting (e.g., macro focus mode setting) is cleared, the electronic display is subsequently entered by a user (during a calibration, matching, or pairing process) for the purpose of programming the neutral density setting into the focus (e.g., in macro focus mode). In one example, the electronic display enters a programming mode (e.g., macro focus mode) by a user holding down the outer arrow button 104 on the electronic display 100 for a period of time. In one example, the outer arrow button is held down until the electronic display visually indicates that it has entered the programming mode (e.g., macro focus mode). In one example, the period is about 3 seconds, and the visual indication is the illumination of one or more lights 100 on the electronic display. In one example, the one or more lights are LED indicators that emit a teal light color indicating that it has entered the macro focus mode. Once in the electronic display programming mode (e.g., macro focus mode), the electronic display may be programmed to calibrate, match, or pair with a different state or setting of focus.

[0066] In one example, the electronic display is calibrated, matched, or paired with the focus of the camera lens according to the following method: With the electronic display in a normal mode (e.g., with a default or previous neutral density setting erased and the electronic display not in an enter state), the focus of the camera lens is set to a desired initial focus value for programming in the electronic display. In one example, this focus value or setting is calibrated, matched, or paired with one or more desired neutral density values ​​or levels in the electronic display. In one example, the electronic display is configured to provide a specific fixed number of stops or neutral density settings (e.g., 6 stops). In one example, the electronic display is calibrated to provide 5 neutral density settings calibrated with the focus of the camera lens. In such an example, the initial focus value may be calibrated, matched, or paired with, for example, 2 stops of neutral density, each with an ND of 0.6. The electronic display then goes into a programming mode (e.g., macro focus mode) as described above. In this state, the neutral density setting of the electronic display may be adjusted by user input, for example, by using wheel 106, to adjust and fine-tune the calibration, matching, or pairing of the neutral density level with a particular focus value or setting. In one example, the neutral density setting is accepted by the electronic display by the user pressing the inward arrow button 102, and acceptance is visually confirmed by a flashing light 110 on the electronic display. The focus of the camera lens is then moved to the next value or setting, and the electronic display is adjusted to provide another desired level of neutral density. In an example where the electronic display is configured with a set neutral density setting, the user may momentarily press the outward arrow button 104 to move to the next neutral density setting. The neutral density value may be fine-tuned or adjusted to the focus value or setting as described above by using wheel 106, and the desired neutral density value may be accepted as described above by pressing the inward arrow button 102 to obtain visual confirmation of acceptance.This process of adjusting the focus of the camera lens to the next value or setting and calibrating, matching, or pairing that focus value or setting to a desired neutral density level of the electronic display is repeated until all desired focus levels have been calibrated, matched, or paired to a neutral density level of the electronic display. This is one example of a method for calibrating an electronic display to a focus to facilitate synchronized operation of the two.

[0067] In an example where the electronic display is configured to have six set neutral density levels or values, it is desired that the final focus value or setting be no more than five settings from the initial focus value or setting because when the electronic display is in a programming mode (e.g., macro focus mode), the range of electronic display neutral density settings for calibration is limited to five settings between ND 0.6 and ND 1.8. If the camera use application or camera user requires or desires less than five focus values ​​or settings, neutral density levels may be moved or skipped during the calibration process without moving to a new focus value or setting.

[0068] After the electronic display has been calibrated, matched, or paired with the focus of the camera lens, the exposure range can be adjusted if necessary (e.g., if the sun goes in or out of the clouds). As described above, this can be done by placing the electronic display in a programming mode (e.g., macro focus mode). To open the exposure range by one value or setting, the user may press the outer arrow button 104 on the electronic display once. To close the exposure range by one value or setting, the user may press the inner arrow button 102 on the electronic display once. For fine adjustments, the user can also move the exposure range up or down by moving the wheel 106 between the two arrow buttons.

[0069] Once the desired calibration of the electronic display and focus is complete, the programmed neutral density setting can be terminated and the electronic display returned to normal operation by pressing and holding the outer arrow button 104 of the electronic display for a period of time (e.g., 3 seconds) until the LED light is no longer illuminated. The electronic display is configured to store the programmed calibrated focus and neutral density settings in its on-board memory. If the electronic display is powered off, the settings are loaded from memory upon power up. If the electronic display is to be used with a new lens, then the calibration procedure is repeated to provide the desired synchronized operation of the electronic display and the focus of the camera lens, in which case the user erases (as described above) and reprograms the existing calibrated neutral density setting associated with the removed lens, and calibrates, matches, or pairs the focus value or setting of the new lens to the electronic display neutral density level in the manner described above. When configured in this manner, the electronic display can be programmed to be calibrated for synchronized focus operation with a variety of different camera lenses.

[0070] Although a particular method for calibrating, matching, or pairing the neutral density levels of an electronic display to a focus value or setting of a camera lens is described above, it should be understood that this is just one approach and that other approaches that function in a similar manner to calibrate, match, or pair neutral density levels with focus values ​​or settings are intended to be within the scope of the electronic display disclosed herein. For example, an electronic display as disclosed herein may have more than six or less than six neutral density settings different from those specifically described and / or may have a continuous gradient of different possible neutral density levels, and for such embodiments, the process of calibrating, matching, or pairing the focus values ​​or settings to such neutral density levels may include a similar general approach as described, in which the focus values ​​or settings are each calibrated to one or more electronic display neutral density levels. In one example, it is desired that as the focus moves from an initial value to a final value, the paired neutral density levels of the electronic display values ​​increase, thereby decreasing the amount of light passing through the electronic display to the camera lens.

[0071] As an alternative to the above-described methods for calibrating focus values ​​or settings to neutral density levels or settings of an electronic display, an electronic display as disclosed herein may be configured to include a memory having stored therein calibrated focus values ​​and associated neutral density levels for different types of lenses. For example, the electronic display may be configured to allow such pre-existing calibration information to be loaded or downloaded into the electronic display's memory by known techniques. It should be understood that all such alternative processes for calibrating an electronic display to focus are intended to be within the scope of the electronic display as disclosed herein.

[0072] In one example, the user controller 214 may be configured as described above to control the electronic display 210 and the focus value or setting. In one example, the controller may be configured to control the focus by a user input, as described above, which may be the same as or different from the input for the iris. In one example, the focus is controlled by a different user input than the iris. For synchronous operation of the electronic display and the focus, the controller 214 is configured to control the focus 206 using one channel. In one example, the controller 214 provides a wireless control signal 224 over one channel that is received by the receiver / transmitter device 216 disclosed above, which operates to convert the control signal received from the controller and separately provide the control signal to the operating mechanism 236 that moves the focus 206 via a wired cable 228 and to the serial input 234 of the electronic display 210 via a wired cable 230. When configured in this manner, when the user operates the controller 214 to change the focus, the electronic display is also changed to a calibrated neutral density value. Although the above method of synchronizing and controlling the operation of an electronic display and focus has been disclosed, it should be understood that there may be other methods or approaches for achieving the same functionality, and all such other methods and approaches are intended to be within the scope of the present disclosure.

[0073] Electronic display synchronized to camera lens iris and camera lens focus- As described above, the electronic display can be calibrated to provide synchronized operation with the iris of the camera lens or the focus of the camera lens. In another example, the electronic display may be configured to provide synchronized operation of either the iris or the focus, while the iris and focus are configured to provide synchronized operation with each other, as described above with respect to each. In one example, the electronic display may be calibrated with the iris, and the controller 214 may be configured to provide synchronized operation of the iris 204 and the electronic display 210, as described above. Additionally, the camera lens focus 206 may be manipulated by the controller 214 to provide synchronized operation with the iris 204, which in one example may be accomplished by the controller 214 providing a control signal (e.g., a wireless signal) for the iris 204 on a single channel. In one example, the receiver / transmitter device 216 receives control signals from the controller (e.g., wirelessly from a provider) and provides three electrical control signals separately, e.g., by cable connections 226, 228, 230, to each of the operating mechanism 232 that moves the iris 204, the operating mechanism 236 that moves the focus 206, and the serial port 234 of the electronic display 210. In this example, the focus operates in synchronism with the iris, and the electronic display operates in synchronism with the iris to provide a neutral density level calibrated with the iris. Alternatively, the electronic display may be calibrated with the focus, and the controller operates to provide control signals via the receiver / transmitter device that cause the iris to operate in synchronism with the focus, and the electronic display operates in synchronism with the focus to provide a neutral density level calibrated with the focus. The above examples illustrate some ways in which an electronic display as disclosed herein can be calibrated and operated in synchronism with both the iris of the camera lens and the focus of the camera lens.It will be understood that calibration and / or control methods and approaches other than those described above may be used to achieve such synchronized operation of the electronic display, iris, and focus, and all such other methods and approaches are intended to be within the scope of this specification.

[0074] In the above example, it will be understood that the electronic display is programmed and calibrated in the same manner as described above with respect to iris and / or focus.

[0075] Electronic display synchronized with the zoom of the camera lens - In one embodiment, the electronic display can be configured to change the degree of filtering in response to changes in the zoom of the camera lens. In such an embodiment, the electronic display is synchronized with the zoom such that changes in zoom result in a desired / calibrated change in the degree of filtering provided by the electronic display. In a non-fixed pupil zoom lens, the lens aperture changes in response to the zoom and focus characteristics (macro characteristics) of the lens, and it is desirable to synchronize the operation of the electronic display with the zoom because the difference in aperture is compensated for by changes in neutral density. In one example, the zoom and electronic display movement can be controlled, for example wirelessly, by a handheld controller 214 or control system as described above. In one example, the controller 214 can be used to control the electronic display in synchronization with the zoom 208, for example, by control signals or commands sent to the zoom mechanism if the camera lens zoom and the electronic display are operated on the same control channel. Although the above method of controlling the operation of the electronic display and zoom in synchronization is disclosed, it should be understood that there are various different methods or approaches to achieve the same functionality, and all such other methods and approaches are intended to be within the scope of this disclosure.

[0076] In an example where the electronic display functions as a neutral density filter that is synchronized with zoom changes, it is desired that the electronic display be specifically programmed to modify the neutral value setting (e.g., zoom mode setting). To calibrate the electronic display with the zoom of the camera lens, the neutral density setting (e.g., zoom mode setting) is changed by erasing the default or previously stored neutral density setting, which can be entered by the user into the electronic display by pressing a button or the like. In one example, the neutral density setting of the electronic display is erased in the same manner as described above for calibrating the electronic display 100 with an iris, i.e., by the user holding down the inward arrow button 102 for a period of time (e.g., about 3 seconds) while the electronic display is in normal mode. In one example, the electronic display has a visual indicator, for example in the form of one or more lights 110. When the neutral density setting (e.g., zoom mode setting) is erased, for example after 3 seconds, the one or more lights go dark to indicate that the erasure is complete. In one example, the visual indicator is in the form of one or more LEDs on the electronic display.

[0077] Once the default or previous neutral density setting (e.g., zoom mode setting) is cleared, the electronic display may then be entered by a user (during a calibration, matching, or pairing process) for the purpose of programming the neutral density setting into the zoom (e.g., in zoom mode). In one example, the electronic display enters a programming mode (e.g., zoom mode) by a user holding down an outer arrow button 104 on the electronic display for a period of time. In one example, the outer arrow button 104 is held down until the electronic display visually indicates that it has entered the programming mode (e.g., zoom mode). In one example, the period is about 3 seconds, and the visual indication is the illumination of one or more lights 110 on the electronic display. In one example, the one or more lights are LED indicators that emit a teal light color indicating that it has entered the zoom mode. Once in the electronic display programming mode (e.g., zoom mode), the electronic display may be programmed to calibrate, match, or pair with a different state or setting of the zoom.

[0078] In one example, the electronic display is calibrated, matched, or paired with the zoom of the camera lens according to the following method: With the electronic display in a normal mode (e.g., with a default or previous neutral density setting erased and the electronic display in a non-entered state), the zoom of the camera lens is set to a desired initial zoom value for programming with the electronic display. In one example, this zoom value or setting is calibrated, matched, or paired with one or more desired neutral density values ​​or levels of the electronic display. In an example where the electronic display is configured to provide a specific fixed number of stops or neutral density settings (e.g., 6 stops), the electronic display is configured to provide 5 neutral density settings calibrated with the zoom of the camera lens. In such an example, the initial zoom value may be calibrated, matched, or paired with, for example, 2 stops of neutral density, each with an ND of 0.6. The electronic display then goes into a programming mode (e.g., macro focus mode) as described above. In this state, the neutral density setting of the electronic display may be adjusted by user input, for example, by using the wheel 106, to adjust and fine-tune the calibration, matching, or pairing of the neutral density level with a particular zoom value or setting. In one example, the neutral density setting is accepted by the electronic display by the user pressing the inward arrow button 102, and acceptance is visually confirmed by a flashing light 110 on the electronic display. The camera lens zoom is then moved to the next value or setting, and the electronic display is adjusted to provide another desired level of neutral density. In an example where the electronic display is configured to have a preset neutral density setting, the user may momentarily press the outward arrow 104 button to move to the next neutral density setting. The neutral density value may be fine-tuned or adjusted between the preset value to the zoom value or setting as described above by using the wheel 106, and the desired neutral density value may be accepted as described above by pressing the inward arrow button 102 to obtain visual confirmation of acceptance.This process of adjusting the zoom of the camera lens to the next value or setting and calibrating, matching, or pairing that zoom value or setting to a desired neutral density level of the electronic display is repeated until all desired zoom levels or settings have been calibrated, matched, or paired to a neutral density level of the associated electronic display. This is one example of a method for calibrating an electronic display to a zoom to facilitate synchronized operation of the two.

[0079] In an example where an electronic display is configured to have six set neutral density levels or values, when the electronic display is in a programming mode (e.g., zoom mode), it is desired that the last zoom value or setting be no more than five settings from the first zoom value or setting because the range of electronic display neutral density settings for calibration is limited to five settings between ND 0.6 and ND 1.8. If the camera usage application or camera user requires or desires fewer than five zoom values ​​or settings, neutral density levels may be moved or skipped during the calibration process without moving to a new zoom value or setting.

[0080] After the electronic display has been calibrated, matched, or paired with the zoom of the camera lens, the exposure range can be adjusted if necessary (e.g., if the sun goes in or out of the clouds). As described above, this can be done by placing the electronic display in a programming mode (e.g., zoom mode). To open the exposure range by one value or setting, the user may press the outer arrow 104 button on the electronic display once. To close the exposure range by one value or setting, the user may press the inner arrow button 102 on the electronic display once. For fine adjustment, the user can also move the exposure range up or down by moving the wheel 106 between the two arrow buttons.

[0081] Once the desired calibration of the electronic display and zoom is complete, the programmed neutral density setting can be terminated and the electronic display returned to normal operation by pressing and holding the outer arrow button 104 on the electronic display for a period of time (e.g., 3 seconds) until the LED light is no longer illuminated. The electronic display is configured to store the programmed calibrated zoom and neutral density settings in its on-board memory. If the electronic display is powered off, the settings are loaded from memory upon power up. If the electronic display is to be used with a new lens, then the calibration procedure is repeated to provide the desired synchronized operation of the electronic display and the zoom of the camera lens, in which case the user erases (as described above) and reprograms the existing calibrated neutral density setting associated with the removed lens, and calibrates, matches, or pairs the zoom value or setting of the new lens to the electronic display neutral density level in the manner described above. Configured in this manner, the electronic display can be programmed to be calibrated for synchronized zoom operation with a variety of different camera lenses.

[0082] Although a particular method for calibrating, matching, or pairing the neutral density levels of an electronic display to the zoom value or setting of a camera lens is described above, it should be understood that this is just one approach and that other approaches that function in a similar manner to calibrate, match, or pair the neutral density levels with the zoom value or setting are intended to be within the scope of the electronic display disclosed herein. For example, an electronic display as disclosed herein may have more than six or less than six neutral density settings different from those specifically described and / or may have a continuous gradient of different possible neutral density levels, and for such embodiments, the process of calibrating, matching, or pairing the zoom value or setting to such neutral density levels may include a similar general approach as described, in which the zoom value or setting is each calibrated to one or more electronic display neutral density levels. In one example, it is desired that as the zoom moves from an initial value to a final value, the paired neutral density levels of the electronic display value increase, thereby decreasing the amount of light passing through the electronic display to the camera lens.

[0083] As an alternative to the above-described methods for calibrating a zoom value or setting to a neutral density level or setting of an electronic display, an electronic display as disclosed herein may be configured to include a memory having stored therein calibrated zoom values ​​and associated neutral density levels for different types of lenses. For example, the electronic display may be configured to allow such pre-existing calibration information to be loaded or downloaded into the electronic display's memory by known techniques. It is understood that all such alternative processes for calibrating an electronic display to a zoom are intended to be within the scope of the electronic display as disclosed herein.

[0084] In one example, the user controller may be configured as described above to control the electronic display and zoom value or setting. In one example, the controller 214 may be configured to control the zoom by a user input as described above, which may be the same as or different from the iris or focus input. In one example, the zoom 208 of the camera lens is controlled by a user input different from the iris or focus. For synchronous operation of the electronic display and zoom, the controller 214 is configured to control the zoom using one channel. In one example, the controller 214 provides a wireless control signal 224 over one channel that is received by the receiver / transmitter device 216 disclosed above, which operates to convert the control signal received from the controller and provide an electrical control signal separately via cable 237 that is input to the operating mechanism 238 that moves the zoom 208, and cable 230 that is connected to the serial input 234 of the electronic display 210. When configured in this manner, when the user operates the controller 214 to change the zoom, the electronic display is also changed to a calibrated neutral density value. While the above method of synchronizing and controlling the operation of an electronic display and zoom has been disclosed, it should be understood that there are a variety of different ways or approaches to accomplish the same functionality, and all such other ways and approaches are intended to be within the scope of the present disclosure.

[0085] Optionally, the zoom may operate synchronously with one or more of the iris or focus, in which case the electronic display is calibrated to one of the iris, focus, or zoom in the manner described above. In such an example, the controller may be configured and operated to provide control signals (e.g., on a single channel) that are received wirelessly by a receiver / transmitter device, which is configured to transmit control signals over separate cables to the zoom and focus, the zoom and iris, or the zoom, iris and focus, and to the electronic display for the desired synchronized movement of one or more of the iris and zoom and zoom, and the electronic display is calibrated to one of such camera lens elements.

[0086] Electronic Display Synchronized to Light Meter - In one example, the electronic display can be synchronized to the exposure measurement of the light meter, and the light exposure information provided by the light meter to the electronic display can operate to change the filter levels of the electronic display. FIG. 14 shows a camera system 300 including a camera 302, a camera lens system 304, and an electronic display 306. In one example, the electronic display can be configured to provide light meter exposure measurement information stored in its memory, which may be downloaded to the electronic display's memory by wireless or wired communication with a source of light meter exposure measurements, such as in the form of a table matching light meter exposure measurements with neutral density levels or values. Alternatively, the electronic display may be calibrated by the user in a manner similar to that described for the camera lens elements, for example, by using a button on the electronic device and a series of steps for calibration, as described above, to provide selected neutral density levels that are paired with the light meter exposure measurements. In one example, a light meter 308 (such as a TENMA 72-7250 digital light meter) is used to transmit exposure measurements to the electronic display via a wireless or wired connection to the electronic display, which can modify the neutral density levels generated based on stored exposure measurement calibration information. In examples where a light meter is used near a camera system, the exposure measurements of the light meter may be transmitted to the electronic display 306 via an electrical cable 310 connected to an electronic display serial input 312. In examples where a light meter is used near a subject imaged by a camera system, the exposure measurements of the light meter may be transmitted wirelessly to the electronic display 306, such as by use of a wireless transmitter 314 that transmits the exposure measurements wirelessly 315 to a wireless receiver 316, which is connected to the light meter 308 via a cable 318, and the wireless receiver is connected to the serial input 312 of the electronic display 306 via a cable 320.

[0087] In one example, the electronic display may be used in this manner according to at least two different modes of operation. In one example, the electronic display operates in a continuous metering mode, where the light meter continuously provides exposure measurement information to the electronic display, and the electronic display changes the neutral density level as needed to accommodate different exposure measurements. In one example, the electronic display may operate in a non-continuous metering mode, where exposure measurements are intermittently sent to the electronic display, and changes are made to the neutral density level based on the exposure measurements received. In one example, the light meter may be located anywhere dictated by the particular camera capture use and / or application, for example, the light meter may be located in close proximity to the camera or near the subject / image of interest captured by the camera lens.

[0088] Although a particular example of a synchronized electronic display for use with a light meter and a method of using the same have been described, it should be understood that there may be different ways of implementing the use of such a synchronized light meter and electronic display which provide the same desired functionality, and all such different ways or variations are intended to be within the scope of the electronic display as disclosed herein.

[0089] An electronic display as disclosed herein having programmable features (e.g., filter level settings) can be configured to be placed and used in different camera system locations. As mentioned above, an electronic display as disclosed herein may be placed on the object side of the camera lens (e.g., in front of the lens), but it is understood that a programmable electronic display as disclosed herein may be placed between different elements or sections of the camera lens, between the camera lens and the camera (e.g., behind the lens), or even inside the camera, depending on the particular end use, and all such electronic display placements are intended to be within the scope of an electronic display as disclosed herein.

[0090] In one embodiment, the filter may operate autonomously based on an image received or provided to the camera. A sensor may be utilized to detect the image provided to the camera, and a control may be provided to the filter input to automatically vary the filtering based on the received image. For example, if the scene is bright, the filter may be configured to automatically reduce the brightness of the image. The sensor may be located with the camera or may be located elsewhere. In one embodiment, the camera may be configured to provide a control to the input of the filter based on an image received by the camera. For example, if the camera (such as the camera's digital image sensor) detects that it is looking at a bright scene, a control may be provided to the input of the filter to reduce the brightness. Thus, the filter may operate in a feedback loop based on the image.

[0091] The electronic display 12, controller 16, power supply 18, and / or input 20 may comprise a unit that is removably coupled to the lens system. The unit may include a combined electronic display 12 and housing 14 as shown in FIG. 1. The unit may have a size and shape similar to current non-electronic displays and thus may be used to replace these non-electronic displays with similar matte boxes or other methods of coupling filters to lenses. In one embodiment, the filter 10 and its components may be integral to the lens system and may not be removable. In other embodiments, certain components may be separable from the lens system and certain components may be integral to the lens system. In other embodiments, certain components disclosed herein may be completely removed.

[0092] The electronic display 12 may filter the image a desired amount or in a predetermined manner. In the embodiment shown in FIG. 1, the electronic display 12 filters the entire image seen through the electronic display 12. The image includes a person 32, clouds 34, and trees 36. The entire tree 36, the entire clouds 34, and a portion of the person 32 are filtered (the filtering is represented by the diagonal lines in FIG. 1). The filtering may be done by reducing the amount of light from the image that is transmitted through the electronic display 12, by changing the color of the light that passes from the image through the electronic display 12, by changing the characteristics of the transmitted light (e.g., by diffusing the image or imparting flare), or in other ways. Filtering may also be included by outgoing light from the electronic display 12 that is superimposed on the image on the object side of the electronic display 12. The outgoing light may change the color or amount (intensity) of light received by the camera lens.

[0093] In embodiments in which light from an image transmitted through electronic display 12 is reduced, the light reduction may have a variety of forms. For example, the light reduction may be similar to a neutral density filter (ND filter) that can filter substantially equally for all colors of the image. However, the amount of filtering can be electronically varied, thereby allowing the electronic display to act as an electronically variable neutral density filter. In one example, the light reduction may be caused by liquid crystals in electronic display 12 that do not allow a desired amount of light to pass through electronic display 12. The transmittance of light through the liquid crystals can be electrically varied. The light transmission may range from about 50% (similar to a 0.3 ND filter), to about 25% (similar to a 0.6 ND filter), to about 12.5% ​​(similar to a 0.9 ND filter), to about 6.25% (similar to a 1.2 ND filter), to about 3.125% (similar to a 1.5 ND filter), to about 1.5625% (similar to a 1.8 ND filter), to about 0.78125% (similar to a 2.1 ND filter), and above, below, and between the total transmission. Also, in embodiments where color filters are used with the electronic display 12, the color of the light passing through individual pixels of the electronic display 12 may be changed. The light transmission (or density of the filter) can be electronically changed to any desired amount (e.g., 99%, 65%, etc.) as needed. The color of the light passing through the electronic display 12 can be changed to any desired color of the spectrum.

[0094] In embodiments where organic light emitting diodes (OLEDs) are utilized, the OLEDs may be configured to emit light at various brightness levels, or in embodiments where color filtering is utilized, may be configured to emit light at various color levels. The electronic display 12 may filter the image by adding light from the OLED at a predetermined brightness and color (in embodiments where color filtering is utilized) to the light from the image. The light from the image may be transmitted through the electronic display 12 and modified by the light added from the OLED. The modification may be done for the entire image (as shown in FIG. 1) or on a pixel-by-pixel basis. In one embodiment, the OLED may be configured to emit light at a predetermined brightness to effectively reduce the brightness of the image.

[0095] Due to the electronic nature of electronic display 12, one or more portions of electronic display 12 may have different filtering characteristics. Variations may occur on a pixel-by-pixel basis. Figure 2, for example, illustrates electronic display 12 having a filtered image in a portion 38 of electronic display 12, while another portion 40 of the display does not have a filtered image. In other words, electronic display 12 is acting as a calibrated filter. The transition between the filtered and unfiltered portions may be abrupt or smooth, as desired.

[0096] Figure 3 shows an electronic display 12 with selected portions filtered. In the example of Figure 3, the tops of the trees 36 and the clouds 34 have been filtered, while other portions are not. A form of "dodge and burn" effect may occur.

[0097] The type and location of filtering on the electronic display 12 may be done on a pixel by pixel basis. Various filtering types and locations may be provided as desired, as shown in Figures 1-3. Variations in filtering may be provided based on controls provided at the inputs of the filters. As disclosed herein, the controls may take a variety of forms.

[0098] The variation of the filtering of the electronic display 12 may be dynamic. The type and location of filtering may change dynamically. For example, the user may electronically control the electronic display 12 to rapidly shift the filtering of individual pixels to produce various filtering patterns (e.g., dynamically shift from the filtering pattern shown in FIG. 1 to the pattern shown in FIG. 2 to the pattern shown in FIG. 3). The user may set any feature of the filtering via a control received from the control terminal 30 or the like. The filtering may be set on a pixel-by-pixel basis. For example, the control interface shown in FIG. 4 allows the user to select individual pixels to obtain the desired filtering characteristics.

[0099] Filtering may vary smoothly through density regions. Filtering may be used to form custom filter patterns. Filtering may be used in combination with camera control. For example, the aperture of a camera may vary to keep foreground objects in focus while moving background objects in and out of focus (a form of aperture filtering), similar to filtering.

[0100] The advantage of the electronic display 12 is that typically non-electrical filters are used in camera systems and must be changed manually from the camera system. Additionally, filters cannot be changed during filming. Furthermore, if the camera is mounted on a crane that can be lowered, the crane must be lowered for an individual to manually change the filter. The electronic display 12 allows for variable filters that can be changed remotely. Filters can be dynamically changed during filming. The user does not need to physically touch the camera.

[0101] FIG. 6A illustrates an embodiment of a portion of an electronic display 12 in which liquid crystals are utilized. The portion of the display 12 may include a front panel 42 and a rear panel 44, which correspond to the front and rear of the display 12, respectively. The panels 42, 44 may be made of optical glass. The display 12 may include polarizing filter panels 46, 48 oriented in mutually orthogonal directions. A control layer 50 comprising transistors and electrodes may be utilized. Liquid crystals 52 may be utilized and divided into an array of pixels 22. In embodiments in which color filtering is desired, a color filter 54 may be used. The color filter 54 may include red, green, and blue subpixels that combine to form colored pixels. The light transmitted through the colored subpixels determines the color of the light transmitted through the electronic display 12. In keeping with the principles of liquid crystal display (LCD) technology, the voltage to the liquid crystals 52 may be varied to change the orientation of the liquid crystals. Depending on the voltage to the liquid crystals, different amounts of light may be transmitted by the liquid crystals 52. However, unlike standard LCD technology, the electronic display 12 does not have a backlight. The image itself produces light that passes through the electronic display 12. In other embodiments, the liquid crystal based electronic display 12 may have uses and structures different from those shown. For example, in one embodiment, a single pixel may be utilized (1x1 array) and utilized to vary the brightness of the image by a desired amount. In one embodiment, the order or presence of the internal layers 50, 52, 54 may vary depending on the desired structure of the electronic display 12. In one embodiment, the presence or structure of the polarizing filter panels 46, 48 may vary as desired.

[0102] FIG. 6B shows an embodiment of a portion of an electronic display 12 in which an OLED is utilized. The portion of the display 12 may include a front panel 56 and a rear panel 58, which correspond to the front and rear of the display 12, respectively. The panels 56, 58 may be made of optical glass. The display 12 may include a cathode 60 and an anode 62. An electronic control 64 may be provided in the form of a transistor matrix. An organic layer 66 may be provided, which is divided into an array of pixels 24. In an embodiment in which color filtering is provided, the pixels 24 may be arranged in subpixels of emitting colors. As shown in FIG. 6B, three pixels 24 are shown, which may be red, green, and blue pixels. The pixels 24 may be arranged in subpixels of emitting colors, for example purple and orange. In other embodiments, the color may not be provided by an OLED. The OLED panel may also be transparent, transmitting light of the image modified by the light from the OLED. The configuration of the OLED may differ from that shown in FIG. 6B. In one embodiment the arrangement may be active matrix (AMOLED) and in other embodiments passive (PMOLED). In one embodiment a single OLED pixel (1x1 array) may be provided.

[0103] 6A-6D may be anti-reflective hard coated. Ravg may be 0.2% or less at 400-700 nm with an incident angle of 15 degrees. Transmitted wavefront accuracy may be preferably 1 / 2λ or less.

[0104] While the embodiment shown in FIG. 6A for using liquid crystals shows a certain type of liquid crystal display architecture, it will be understood that electronic devices utilizing liquid crystals for electronic display purposes as disclosed herein may have other types of architectures, and all such different architectures are within the scope of the present disclosure. In FIGS. 6C-6E, an embodiment of an electronic display 100 utilizing liquid crystals having a different architecture than that shown in FIG. 6A is shown. In this example, the liquid crystal is provided in a guest-host liquid crystal architecture consisting of a liquid crystal cell filled with two materials (i.e., a dye material or "guest" and a liquid crystal material or "host"). In one example, both the guest material and the host material assume a rod-like shape inside the cell. The transmission state of such an electronic display can be controlled by different orientations of the liquid crystal layer.

[0105] The transmission of light through the electronic display is controlled by a liquid crystal guest-host dye layer. By applying different voltages across this layer, the orientation of the liquid crystal director can be changed to different states. Because the dye molecules have a similar chemical structure to the liquid crystal molecules, the dye molecules align with the liquid crystal director. Figures 6C-6D show an electronic display 100 and provide schematics of the director structures for two representative states. When unpolarized light is incident on the dye material, polarization-dependent absorption occurs. By introducing a twist into the liquid crystal guest-host dye layer, the dye is oriented differently through the liquid crystal layer, making the absorption less dependent on polarization.

[0106] Figure 6C illustrates an electronic display 100 with the liquid crystal directors arranged in a first state (102) to reduce light transmission. Figure 6D illustrates an electronic display 100 with the liquid crystal directors arranged in a second state (104) to increase light transmission. Based on an electric field applied to the electronic display, the alignment displacement of the liquid crystal directors changes.

[0107] In other embodiments, other forms of electronic displays may be used.

[0108] FIG. 7A shows an embodiment of an electronic panel 61 in which liquid crystals 63 are utilized to filter images by diffusing light. The liquid crystals may be configured to randomly orient when a voltage or other form of energy is applied or removed from the liquid crystals. Changing the orientation of the liquid crystals can result in scattering of light, resulting in light diffusion. The degree of diffusion can be changed by varying the amount of voltage or other form of energy applied or removed from the liquid crystals. The rightmost image in FIG. 7A shows random orientation of the liquid crystals.

[0109] FIG. 7B illustrates an embodiment of an electronic panel 65 in which liquid crystals 67 or particles (such as pieces of fiberglass) are utilized to filter images by spreading out the light. The liquid crystals or other particles may be configured to orient in a certain direction when a voltage or other form of energy is applied or removed. For example, the particles such as liquid crystals may be configured to orient in a horizontal direction. When the orientation of the liquid crystals or particles is aligned horizontally, a horizontal flare of the light passing through the panel 65 may occur, similar to the operation of a "streak" filter. In other embodiments, other directions of alignment and other directions of flaring may be provided. For example, a vertical flare, or a diagonal flare may be provided, again similar to the operation of a "streak" filter. In one embodiment, the liquid crystals or other particles may be configured to be radially oriented such that a radial flare occurs. The degree of flaring may be varied by varying the amount of voltage or other form of energy applied or removed from the liquid crystals or particles, changing the orientation of the liquid crystals or particles accordingly. The right-most image in FIG. 7B shows a horizontal orientation of the liquid crystals or particles (although other orientations may also be provided), which results in a horizontal flare of light.

[0110] In one embodiment, a combination of liquid crystal and OLED may be utilized. FIG. 7C shows an electronic panel 69 configuration utilizing a combination of electronic panel 71 including one or more OLEDs and electronic panel 73 including liquid crystal. Panels 71, 73 may operate according to the methods disclosed herein for each of the OLED and liquid crystal panels. Panels 71, 73 may be configured in a stacked manner such that light passes through both panels 71, 73. Thus, electronic panel 73 may darken or lighten the image (or create other optical effects as disclosed herein) and electronic panel 71 may add an overlay light on the resulting image to create filtering.

[0111] The electronic panels disclosed herein may be controlled by the devices, systems, and methods disclosed herein. Combinations of panels and panel effects may be provided as desired.

[0112] 8 shows a side view of a camera system 70. The camera system 70 may include a camera 72 and may include a lens system 74. The lens system 74 may include a camera lens 76 and may include a matte box 78. The matte box 78 may include a filter slot 80 for receiving the filter 10. The filter 10 may be located on the object side 82 of the camera lens 76 (opposite the image side where the camera receives images). The camera lens 76 may be composed of one or more individual lens elements.

[0113] Filter 10 may be removably coupled to a matte box 78. Matte box 78 may be a conventional cinematography matte box.

[0114] In other embodiments, other forms of coupling of filter 10 to lens system 74 or camera system 70 may be utilized. For example, a threaded, snap-fit, or other form of mechanical connection may be provided for coupling.

[0115] 9 shows a front perspective view of camera system 70. Filter 10 is installed in a matte box 78.

[0116] FIG. 10 illustrates an embodiment in which the filter 10 is disposed between the camera lens 76 and the image receptor 69 of the camera 72. The image receptor 69 may comprise a digital sensor, film, or the like, for receiving the camera image, or may comprise other forms of image receptors. The filter 10 may be configured to provide the filtering disclosed herein, but may be configured on the image side of the camera lens 76 and the object side of the image receptor 69. A number of lens elements 73, 75, 77 that make up the lens 76 are shown. The filter 10 is disposed in the optical path of the camera system 71. In certain embodiments, the filter 10 may preferably include an OLED to provide the OLED filtering disclosed herein. The filter 10 may be removably or permanently coupled to the camera system 71.

[0117] In embodiments herein, the camera 72 may be a motion picture camera (film or digital camera) or a still image camera, e.g., a still photo camera. The camera may be used for cinematography (film production) or for non-cinematography or commercial purposes. In one embodiment, the camera may be a mobile device (smartphone or other form of mobile device).

[0118] 11, for example, illustrates a filter 79 including an electronic display 81 according to embodiments disclosed herein. The filter 79 is coupled to the object side of a camera lens 83 of a camera of a mobile device 85. Filtering as disclosed herein may be provided. The filter 79 may be removably coupled to the mobile device 85. The removably coupled may be via adhesive, threads or snap fit, or other forms of coupling. In one embodiment, the filter 79 may be located on the image side of the camera lens 83 and thus may be permanently coupled to the mobile device 85.

[0119] In one embodiment, the filters, electronic displays, and other devices, systems, and methods are not limited to use with cameras. The filters, electronic displays, and other devices, systems, and methods can be used in other optical embodiments, such as augmented reality viewers (including headsets, handsets, and the like) and virtual reality viewers (including headsets, handsets, and the like).

[0120] The present disclosure is not limited to the devices and systems disclosed herein, but extends to all methods of using, providing or implementing any of the devices and systems disclosed herein, and their respective features.

[0121] In closing, although aspects of the present specification have been emphasized with reference to specific embodiments, it should be understood that those skilled in the art will readily appreciate that these disclosed embodiments are merely illustrative of the principles of the subject matter disclosed herein. Thus, it should be understood that the disclosed subject matter is in no way limited to the specific methodology, procedures, and / or reagents, etc., described herein. Thus, various modifications or alterations to the disclosed subject matter or other configurations thereof are possible in accordance with the teachings herein without departing from the spirit of the specification. Finally, the terminology used herein is merely for the purpose of describing specific embodiments and is not intended to limit the scope of the systems, devices, and methods disclosed herein, which are defined only by the claims. Thus, the systems, devices, and methods are not limited to those specifically shown and described.

[0122] Certain embodiments of the systems, devices, and methods are described herein, including the best mode for carrying out the invention known to the inventors. Of course, variations of these described embodiments will be apparent to those of skill in the art upon reading the above description. The inventors anticipate that such variations will be employed by those of skill in the art as appropriate, and the inventors contemplate that the systems, devices, and methods may be practiced in ways other than as specifically described herein. Accordingly, the systems, devices, and methods are intended to include all modifications and equivalents of the subject matter recited in the claims appended hereto as permitted by applicable law. Moreover, any combination of the above-described embodiments in all possible variations thereof is encompassed by the systems, devices, and methods unless otherwise expressly stated herein or otherwise clearly contradicted by context.

[0123] Groupings of other embodiments, elements, or steps of the systems, apparatus, and methods should not be construed as limiting the invention. The members of each group may be referenced and claimed individually or in any combination with the members of other groups disclosed herein. It is contemplated that one or more members of a group may be included in or deleted from a group for reasons of convenience and / or patentability. When any such inclusion or deletion occurs, the specification shall include the group as modified, and thus satisfy all Markush group descriptions used in the appended claims.

[0124] Unless otherwise indicated, all numbers expressing characteristics, items, amounts, parameters, properties, terms, and the like used in the specification and claims are to be understood as being modified in all instances by the term "about." As used herein, the term "about" means that the characteristic, item, amount, parameter, property, or term so quantified may vary, but encompasses approximations that may enable the desired operation or process discussed herein to be performed.

[0125] The terms "a," "an," "the," and similar referents used in the context of describing systems, devices, and methods (particularly in the context of the claims below) should be construed to encompass both the singular and the plural, unless otherwise stated herein or clearly contradicted by context. All methods described herein can be performed in any suitable order, unless otherwise stated herein or clearly contradicted by context. The use of any and all examples or example language (e.g., "etc.") provided herein is intended merely to provide a better understanding of the systems, devices, and methods, and does not impose limitations on the scope of the systems, devices, and methods, unless otherwise stated in the claims. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the systems, devices, and methods.

[0126] The entire disclosures of all patents, patent publications, and other publications referenced and identified in this specification are individually and specifically incorporated herein by reference to describe and disclose, for example, the compositions and methodologies described in such publications that may be used in connection with the systems, apparatus, and methods. These publications are provided solely for their disclosure prior to the filing date of this application. Nothing in this regard should be construed as an admission that the inventors are not entitled to antedate such disclosure by virtue of prior invention or for any other reason. All statements as to the date or representation as to the content of these documents are based on the information available to the applicant and do not constitute any admission as to the accuracy of the dates or contents of these documents.

Claims

1. 1. A filter for use in a camera, comprising: an electronic display configured to be attached to a camera lens system for filtering an image sent to a camera, the electronic display having a filter level setting calibrated to at least one of an iris T aperture setting of the camera lens, a focus setting of the camera lens, a zoom setting of the camera lens, and an exposure measurement of a light meter; a controller configured to electronically control the filtering of the electronic display; receiving means for receiving a control signal for controlling the controller; Equipped with The electronic display is configured to operate in synchronization with at least one of the camera lens iris, the camera lens focus, the camera lens zoom, and the light meter, and to change filter settings based on at least one of different iris T aperture settings, different focus settings, different zoom settings, and different exposure measurements in accordance with the respective calibrated filter level settings.

2. 10. The filter of claim 1, wherein the electronic display includes liquid crystals therein for filtering the image.

3. 2. The filter of claim 1, wherein said electronic display is a neutral density filter and said filter level settings are different neutral density levels.

4. The filter of claim 1 , wherein the electronic display includes one or more organic light emitting diodes therein for filtering the image.

5. 2. The filter of claim 1, further comprising a housing coupled to said electronic display, said controller and said receiving means being disposed within said housing.

6. The filter of claim 4 , wherein the housing forms at least a portion of a frame for the electronic display.

7. The filter of claim 1 , wherein the electronic display is configured to removably couple to a matte box for coupling to the camera lens.

8. 10. The filter of claim 1, wherein the filter level setting of the electronic display is calibrated to an iris T stop setting of the camera lens, and the electronic display operates in sync with the iris of the camera lens.

9. The filter of claim 1 , wherein a filter level setting of the electronic display is calibrated to a focus setting of the camera lens, and the electronic display operates in sync with the focus of the camera lens.

10. 8. The filter of claim 7, wherein a filter level setting of the electronic display is calibrated to an iris setting of the camera lens, the electronic display operating in synchronization with the iris of the camera lens, and the iris of the camera lens operating in synchronization with a focus of the camera lens.

11. 2. The filter of claim 1, wherein a filter level setting of said electronic display is calibrated to said exposure measurement of said light meter, said electronic display operating in synchronism with said light meter.

12. 2. The filter of claim 1, wherein the electronic display includes a first portion and a second portion, both of which are configured to pass light, and the controller is configured to electrically control the filtering of the electronic display such that the first portion filters the image while the second portion does not filter the image.

13. 13. The filter of claim 12, wherein the controller is configured to electronically control the filtering of the electronic display such that the second portion filters the image at the same time that the first portion does not filter the image.

14. The filter of claim 1 , wherein the receiving means comprises a wireless signal receiver.

15. 2. The filter of claim 1, wherein said receiving means comprises a serial input port.

16. The filter of claim 1 , wherein the filter is mounted on the object side of the camera lens system.

17. 1. A filter for a camera system, comprising: an electronic display configured to couple to a portion of the camera system in an optical path of the camera system and configured to filter an image passing through the electronic display for the camera system, the electronic display including liquid crystals configured to provide different levels of neutral density filtering to light passing through the electronic display; means for storing different programmed neutral density filter settings, the different programmed neutral density filter settings being calibrated to at least one of different iris T aperture settings of the camera lens, focus settings of the camera lens, zoom settings of the camera lens, and exposure measurements of a light meter; a controller configured to control the filtering of the electronic display; receiving means for receiving a control signal for controlling the controller; Equipped with The electronic display is controlled to operate in synchronization with at least one of the camera lens iris, the camera lens focus, the camera lens zoom, and the light meter, and the filters vary the neutral density level provided by the electronic display based on at least one of different iris T aperture settings, different focus settings, different zoom settings, and different exposure measurements in accordance with the respective calibrated filter settings.

18. The filter of claim 17 , wherein the filter is configured to couple to the camera system between a camera lens of the camera system and an image receptor of the camera system.

19. The filter of claim 17 , wherein the filter is configured to couple to the camera system on an object side of the camera lens of the camera system.

20. 20. The filter of claim 17, further comprising a processor configured to enable programming the filter to assign different neutral density filter settings to at least one of different iris T stop settings, focus settings, zoom settings, and different exposure measurement values, thereby providing the calibrated filter settings.

21. 20. The filter of claim 17, wherein the calibrated filter setting is calibrated to an iris of the camera lens, and the electronic display operates in synchronization with the iris of the camera lens.

22. 20. The filter of claim 17, wherein the calibrated filter settings are calibrated to a focus of the camera lens, and the electronic display operates in sync with a focus of the camera lens.

23. 18. The filter of claim 17, wherein the calibrated filter setting is calibrated to an iris of the camera lens, the electronic display operates in synchronization with the iris of the camera lens, and the focus of the camera lens operates in synchronization with the iris of the camera lens.

24. 20. The filter of claim 17, wherein the calibrated filter settings are calibrated to the exposure measurement values, and the electronic display operates in synchronism with the light meter.

25. 1. A method for filtering an image of a camera system including a camera, a camera lens, and an electronic display coupled to the camera system, comprising: inputting filter settings into the electronic display device, the filter settings being calibrated with at least one of an iris T aperture setting of the camera lens, a focus setting of the camera lens, a zoom setting of the camera lens, and an exposure measurement of a light meter; filtering an amount of light passing through the camera with the electronic display, wherein during the filtering step, the electronic display operates in synchronization with at least one of the camera lens iris, the camera lens focus, the camera lens zoom, and the light meter to provide calibrated filter settings associated with each camera lens iris, camera lens focus, camera lens zoom, and light meter; The method comprising:

26. 26. The method of claim 25, wherein the inputting step includes programming at least one of an iris T aperture setting, a focus setting, a zoom setting, and an exposure measurement value with an associated electronic display filter setting, thereby generating the calibrated filter setting.

27. 26. The method of claim 25, wherein the filtering step is provided by liquid crystals within the electronic display device to provide neutral density filtering.

28. 26. The method of claim 25, wherein the electronic display device operates in synchronization with an iris of the camera lens, and during the filtering step, the electronic device provides filter settings that are calibrated with iris settings of the camera lens.

29. 26. The method of claim 25, wherein the electronic display device operates synchronously with a focus of the camera lens, and during the filtering step, the electronic device provides filter settings that are calibrated with the focus of the camera lens.

30. 26. The method of claim 25, wherein the electronic display device operates in synchronization with an iris of the camera lens which operates in synchronization with a focus of the camera lens, and during the filtering step, the electronic device provides filter settings that are calibrated with the iris of the camera lens.

31. 26. The method of claim 25, wherein the electronic display device operates in synchronization with the light meter, and during the filtering step, the electronic device provides filter settings that are calibrated with the light meter.

Images