108 controls the electrochromic film device 92 to remain in the turned-off state. In some examples, when the response signal received by the receiver 104 indicates a second response state (e.g., a negative response from the user, no authorization, etc.), the processor 108 controls the electrochromic film device 92 to change from the turned-on state to the turned-off state.

In another embodiment, by operation of the processor 108, a power supply device is connected to the electrochromic film device 92 providing electricity power. In various implementations, the power supply device is disposed in various locations. (e.g., in the security control system 100 or outside of the security control system 100, etc.) In another example, the power supply device is disposed in the vehicle start system 94 and is in connection with the interface device 110. The power supply device provides electricity power to the receiver 104, the transmitter 106, and the processor 108. In the other direction, when the receiver 104 receives the response signal indicating the second response state (e.g., no authorization, etc.), the processor 108 controls, via the interface device 110, the power supply device of the vehicle start system 94 to shut down. As a result, the electrochromic film device 92 is kept in the turned-off state while the vehicle start system 94 is shut down.

In yet another embodiment, the receiver 104, the transmitter 106, and the processor 108 are integrated on a circuit board (e.g., a printed circuit board (“PCB”)). In various implementations, the circuit board is disposed in various locations. For instance, the circuit board is disposed near the dashboard of a vehicle.

Examples of the processor 108 include microprocessor or microcontroller, such as a Renesas R5F3650NDFB or similar device. Such a microprocessor or microcontroller operates to execute programs stored in memory devices that can be reprogrammed. Generally, a processor will receive instructions and data from a read only memory or a random access memory or both. The elements of a computer are a processor for executing instructions and one or more memory devices for storing instructions and data. Generally, a computer will also include, or be operatively coupled to receive data from or transfer data to, or both, one or more mass storage devices for storing data, e.g., magnetic, magneto optical disks, or optical disks. Information carriers suitable for embodying computer program instructions and data include all forms of nonvolatile memory, including by way of example semiconductor memory devices, (e.g., EPROM, EEPROM, and flash memory devices); magnetic disks, (e.g., internal hard disks or removable disks); magneto optical disks; and optical disks (e.g., CD and DVD disks). The processor and the memory can be supplemented by, or incorporated in, special purpose logic circuitry (e.g., FPGAs or ASICs, etc.).

FIG. 2 is a simplified diagram illustrating properties of an example electrochromic film system 200 in a turned-off state (as depicted by 200a) and in a turned-on state (as depicted by 200b). In the illustrated examples, the electrochromic film system 200 includes a glass layer 202, an adhesive layer 204, an electrochromic film device 206 (e.g., a film containing polymer-dispersed liquid crystals (“PDLC”)), a power supply device 208, and a switch 210. The electrochromic film device 206 is applied and attached to the glass layer 202 with the adhesive layer 204. The power supply device 208 is connected to the electrochromic film device 206, the connection being controlled by the switch 210. In another example, the electrochromic film device 206 can be a suspended-particle device (SPD), in which a thin film laminate of rod-like nano-scale particles are suspended in a liquid and placed between two pieces of glass and/or plastic, or attached to one layer. In a further example, the electrochromic film device 206 contains micro-blinds composed of rolled thin metal blinds on glass, thus controlling the amount of light passing through in response to applied voltage. In some examples, blinds that can be mechanically turned are applied to the glass. Without using any electrochromic device, a processor can control (e.g., via a servo motor) the blinds to switch the glass between a transparent state and an opaque state.

When the switch 210 is turned off, there is no electricity going through the electrochromic film device 206. As a result, due to the electrical properties of PDLC film, the liquid crystals in the electrochromic film device 206 are oriented in random different directions, and thus unaligned. In this case, light traveling through the glass layer 202 would reflect off or refract through the electrochromic film device 206, resulting in the electrochromic film device 92 appearing opaque. When the switch 210 is turned on, there is electricity going through the electrochromic film device 206. As a result, the liquid crystals in the electrochromic film device 206 are all aligned in the same direction, allowing the light to pass through the film and making the electrochromic film device 206 appear transparent.

FIG. 3 illustrates an exemplary method 300 for vehicle security control. In the illustrated example, the method 300 includes steps 302, 304, 306, 308, 310, 312, and 314. At step 302, a receiver checks for a first signal sent from a remote access device, the first signal indicating that the remote access device is within a predetermined proximity range of the receiver. The receiver attempts to detect the first signal and would be able to receive the first signal if the remote access device is within a predetermined proximity range of the receiver. Thus, when the receiver receives the first signal sent from the remote access device, it is indicated that the remote access device is present within the predetermined proximity range of the receiver. The receiver is able to communicate to a processor, which determines at step 304 whether the receiver receives the first signal.

When the result to step 304 is in the affirmative, the processor causes an electrochromic film device in a turned-off state to change to a turned-on state at step 306. The turned-on state allows electricity to flow through to the electrochromic film. As a result, the electrochromic film turns transparent and visibility through the electrochromic film is allowed.

In some examples, at step 306, the processor is configured to cause the electrochromic device to be in the turned-on state when, in addition to receiving the first signal, the receiver also receives a response signal from a remote authenticator device indicating an authorization (as described below at steps 308, 310, and 312). Otherwise, the processor is configured to cause the electrochromic device to remain in the turned-off state.

When the result to step 304 is in the negative, a transmitter sends a second signal to a remote authenticator device at step 308. The second signal triggers a response signal, which indicates either a first response state (e.g., an affirmative answer or an authorization, etc.) or a second response state (e.g., a negative answer or no authorization, etc.), from the remote authenticator device. At step 310, the receiver receives the response signal. Then the processor determines, at step