Display Output Format Control Using Adjusted EDID

Solution Overview

Problem

Conventional output apparatuses fail to transmit accurate format information of content data to the transmission source, leading to potential image deterioration and increased load due to resizing when the display and reception devices have mismatched resolutions.

Innovation Solution

The display device includes a controller that acquires and adjusts Extended Display Identification Data (EDID) from both the display and capture board, ensuring the transmission of format information that matches the display's capabilities, thereby preventing the need for resizing and maintaining image quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the transmission source transmits content data at high resolution (e.g., 4K) without receiving accurate format information, then the reception device can support high resolution, but the output apparatus experiences increased processing load and potential image deterioration due to resizing

Engineering Contradiction:

Improveformat information accuracyVSAvoidprocessing load

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The output apparatus performs preliminary action by acquiring and adjusting EDID format information from the display device before receiving content data from the transmission source. This allows the output apparatus to pre-determine the optimal format parameters and communicate them to the transmission source, so that content data is transmitted in the correct format from the start, eliminating the need for subsequent resizing operations and reducing processing load.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention implements feedback by having the output apparatus transmit adjusted format information back to the transmission source device. The transmission source uses this feedback to adjust its output format, ensuring that content data is transmitted at the appropriate resolution for the display device, thereby preventing the need for resizing at the output apparatus and reducing processing load.

Inventive Principle:

Principle #23Feedback

2Manufacturing precision

If the output apparatus resizes content data to match display resolution, then image quality deteriorates, but format information transmission is avoided

Engineering Contradiction:

Improveimage qualityVSAvoidformat information transmission

Core Design Contradiction:

Manufacturing precisionVSLoss of information

Solution Approach 1:

The output apparatus performs preliminary action by acquiring and adjusting EDID format information from the display device before receiving content data from the transmission source. This allows the output apparatus to pre-determine the optimal format parameters and communicate them to the transmission source, so that content data is transmitted in the correct format from the start, eliminating the need for subsequent resizing operations and reducing processing load.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention implements feedback by having the output apparatus transmit adjusted format information back to the transmission source device. The transmission source uses this feedback to adjust its output format, ensuring that content data is transmitted at the appropriate resolution for the display device, thereby preventing the need for resizing at the output apparatus and reducing processing load.

Inventive Principle:

Principle #23Feedback

3Measurement precision

If the output apparatus acquires and adjusts EDID from both display and capture board, then format information accuracy improves, but device complexity increases

Engineering Contradiction:

Improveformat information accuracyVSAvoidcontroller complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The output apparatus performs preliminary action by acquiring and adjusting EDID format information from the display device before receiving content data from the transmission source. This allows the output apparatus to pre-determine the optimal format parameters and communicate them to the transmission source, so that content data is transmitted in the correct format from the start, eliminating the need for subsequent resizing operations and reducing processing load.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention implements feedback by having the output apparatus transmit adjusted format information back to the transmission source device. The transmission source uses this feedback to adjust its output format, ensuring that content data is transmitted at the appropriate resolution for the display device, thereby preventing the need for resizing at the output apparatus and reducing processing load.

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP3893496B1Output apparatus, output system, method of changing format information, and carrier means

Publication Date: 2025.10.29 RICOH CO LTD

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AI summary

An output apparatus (2) includes an output means (3, 201) that outputs content data received from a transmission source of the content data, a communication unit (110, 204) that receives first format information for the content data from the output means (3, 201). The first format information is supported by the output means (3, 201). The output apparatus (2) further includes a change unit (110, 206) that changes second format information of the content data to the first format information. The second format information is supported by a reception means (111, 208), the reception means (111, 208) is connected between the transmission source and the output apparatus (2).