Interchangeable Lens Driven Information Transmission
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Solution Overview
Problem
The camera system struggles to recognize the type of driven information that an interchangeable lens is capable of transmitting, leading to inefficiencies in communication and control processes.
Innovation Solution
The interchangeable lens includes a driven information transmission unit that sends information about the positions of its driven members via a clock signal from the camera body, along with a type information transmission unit that specifies the type of information being transmitted, using distinct transmission units to ensure accurate communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If general purpose contact points are used for transmitting driven information, then communication flexibility is maintained, but the camera body cannot recognize in advance what type of driven information the lens is capable of transmitting
Solution Approach 1:
The patent applies preliminary action by transmitting type information (data indicating the type of driven information) before the actual driven information through a dedicated first transmission path. This allows the camera body to recognize in advance what type of driven information the lens will transmit, enabling proper preparation and processing of the incoming data without increasing overall system complexity.
2Adaptability or versatility
If multiple types of driven information are transmitted simultaneously, then comprehensive control is achieved, but communication congestion occurs and responsiveness decreases
Solution Approach 1:
The patent applies segmentation by dividing the transmission paths into two separate channels: a first transmission path dedicated to type information and a second transmission path dedicated to driven information. This segmentation allows multiple types of driven information to be transmitted simultaneously without causing communication congestion, as each path handles its specific data type independently, maintaining communication responsiveness while achieving comprehensive control.
3Reliability
If a dedicated first transmission path is added for type information, then the camera body can recognize driven information types in advance, but the number of contact points increases
Solution Approach 1:
The patent applies universality by designing the first transmission path to carry type information that describes the content of the second transmission path. This multi-functional approach allows the communication system to handle multiple types of driven information (focus position, aperture setting, zoom position, etc.) through a single standardized first transmission path, avoiding the need for separate dedicated paths for each data type and thus limiting the increase in contact points while maintaining high reliability.
Data Source
AI summary
An interchangeable lens includes: an attachment section to which a camera body is to be attached; a photographic optical system that includes a plurality of driven members whose driven state changes; a driven information transmission unit that transmits a plurality of items of driven information to the camera body according to a clock signal outputted from the camera body, the plurality of items of driven information being related to positions of the plurality of driven members; and a type information transmission unit that transmits type information via a first transmission unit, the type information representing a type of driven information which can be transmitted by the driven information transmission unit; wherein the driven information transmission unit transmits the driven information for each of the plurality of driven members via a second transmission unit that is different from the first transmission unit.