Color Vision Assessment for Daltonized Displays

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Solution Overview

Problem

Conventional methods for assessing color vision deficiency are either too tedious and time-consuming or produce inaccurate results, making it difficult for users to determine the type and severity of their color vision deficiency, which is essential for effective daltonization on electronic devices.

Innovation Solution

An electronic device with control circuitry that conducts a color vision assessment by displaying a sequence of test images with color patches on different backgrounds, allowing users to input their responses, thereby determining the type and severity of color vision deficiency and applying a user-specific daltonization algorithm to improve visual detail accessibility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional color vision assessment methods are used, then users can determine their color vision deficiency type and severity, but the assessment process becomes too tedious and time-consuming

Engineering Contradiction:

Improvecolor vision deficiency assessment accuracyVSAvoidassessment time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The assessment is divided into multiple test images, each testing specific color deficiency types and severity levels. Each test image presents a focused question about color perception, allowing the system to systematically evaluate different aspects of color vision without overwhelming the user in a single lengthy test.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system tests a predetermined number of severity levels for each type of color vision deficiency, using a limited set of representative test images rather than exhaustively testing all possible color combinations. This provides sufficient assessment accuracy while keeping the test duration manageable.

Inventive Principle:

Principle #16Partial or excessive action

2Measurement precision

If conventional color vision assessment methods are used, then users can determine their color vision deficiency type and severity, but the methods produce inaccurate results

Engineering Contradiction:

Improvecolor vision deficiency assessment accuracyVSAvoidassessment result reliability

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The system receives user input responses to each test image and uses this feedback to determine the user's color vision deficiency type and severity. The control circuitry analyzes the pattern of responses across multiple test images to accurately classify the deficiency, improving reliability through systematic analysis of user feedback.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system varies parameters such as color patch colors, background colors, and color differences across test images to test different severity levels. By changing these parameters systematically, the assessment can accurately determine both the type and severity of color vision deficiency, improving measurement precision and result reliability.

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If a user-specific daltonization algorithm is applied, then users with color vision deficiency can see visual details they would otherwise miss, but the system must first accurately determine the user's color vision deficiency type and severity

Engineering Contradiction:

Improvevisual detail accessibilityVSAvoiddaltonization system complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The system performs a color vision assessment before applying daltonization, preliminarily determining the user's deficiency type and severity. This preliminary action enables the system to select the appropriate daltonization algorithm tailored to the user's specific needs, improving visual detail accessibility while managing complexity through structured pre-assessment.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS9826898B1Color vision assessment for displays

Publication Date: 2017.11.28 APPLE INC

AI summary

An electronic device may include a display and control circuitry that operates the display. The control circuitry may be configured to daltonize input images to produce daltonized output images that allow a user with color vision deficiency to see a range of detail that the user would otherwise miss. The daltonization algorithm may be specific to the type and severity of color vision deficiency that the user has. The control circuitry may conduct a color vision assessment using the display. The color vision assessment may include a sequence of test images that are each displayed for a predetermined period of time before moving to the next test image in the sequence. Each test image may include a color patch on a neutral background. A predetermined number of severity levels for each type of color vision deficiency may be tested during the color vision assessment.