Focal Plane Shutter Trailing Blade and Shading Member Linkage

Solution Overview

Problem

Existing image pickup devices with focal plane shutters have a long shooting interval due to the need for trailing blades to remain closed until image data is read, which delays the next exposure operation.

Innovation Solution

An image pickup device with a focal plane shutter that includes a mechanical trailing blade and a shading member, where the trailing blade drive lever and connection member are connected to maintain the opening closed, allowing the shading member to recede, enabling image data reading while the trailing blade recedes, thus shortening the shooting interval.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the trailing blade maintains a closed state until image data is read, then image quality is maintained, but the shooting interval is extended

Engineering Contradiction:

Improveimage qualityVSAvoidshooting interval

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The shutter mechanism is divided into two independent functional components: the trailing blade for maintaining closed state during exposure, and the shading member for controlling light during data reading. This segmentation allows the shading member to recede independently while the trailing blade maintains its closed state, enabling parallel operations that reduce the shooting interval without compromising image quality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The shading member acts as an intermediary element between the trailing blade and the image pickup element. It can independently control light shading during the data reading phase, allowing the trailing blade to maintain its closed state while the shading member manages light control. This intermediary function enables the system to shorten the shooting interval without sacrificing image quality.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If the trailing blade recedes immediately after exposure, then the shooting interval is shortened, but light shading during data reading is insufficient

Engineering Contradiction:

Improveshooting intervalVSAvoidlight shading quality

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The shutter mechanism is divided into two independent functional components: the trailing blade for maintaining closed state during exposure, and the shading member for controlling light during data reading. This segmentation allows the shading member to recede independently while the trailing blade maintains its closed state, enabling parallel operations that reduce the shooting interval without compromising image quality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The shading member acts as an intermediary element between the trailing blade and the image pickup element. It can independently control light shading during the data reading phase, allowing the trailing blade to maintain its closed state while the shading member manages light control. This intermediary function enables the system to shorten the shooting interval without sacrificing image quality.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Object-affected harmful factors

If the shading member recedes before data reading, then light shading is insufficient, but if it recedes after, then the shooting interval is extended

Engineering Contradiction:

Improvelight shadingVSAvoidshooting interval

Core Design Contradiction:

Object-affected harmful factorsVSLoss of time

Solution Approach 1:

The shutter mechanism is divided into two independent functional components: the trailing blade for maintaining closed state during exposure, and the shading member for controlling light during data reading. This segmentation allows the shading member to recede independently while the trailing blade maintains its closed state, enabling parallel operations that reduce the shooting interval without compromising image quality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The shading member maintains a continuous closed state during both exposure and data reading phases, ensuring uninterrupted light control. By keeping the shading member closed throughout the entire sequence and only receding when necessary, the system maintains continuous useful action without extending the shooting interval.

Inventive Principle:

Principle #20Continuity of useful action

Data Source

PatentUS9389484B2Image pickup device and focal plane shutter

Publication Date: 2016.07.12 SEIKO GRP CORP

AI summary

An image pickup device includes: an image pickup element; a control portion artificially driving an electronic leading blade by resetting stored charges of the image pickup element in a predetermined direction at every pixel line; and a focal plane shutter includes a board including an opening exposing the image pickup element, a mechanical trailing blade capable of opening and closing the opening, a trailing blade drive lever driving the trailing blade, an actuator actuating the trailing blade drive lever, a shading member capable of opening and closing at least a part of the opening, a shading member drive lever driving the shading member, a connection member provided on the shading member drive lever, and a biasing member biasing the shading member drive lever such that the shading member recedes from the opening.