Cradle Optical Sensor for Tablet Display Calibration

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Solution Overview

Problem

Existing image display devices, particularly medical monitors and tablet terminals, face challenges in adjusting display image quality due to the difficulty in reducing size and weight while maintaining high display characteristics, and require complex measurements to correct uniformity, which involves measuring luminance distribution using optical sensors.

Innovation Solution

An image display device comprising a tablet terminal with a cradle that includes an optical sensor capable of detecting display light, allowing for automatic correction of display characteristics by adjusting luminance and gamma levels, thereby simplifying the measurement process and maintaining consistent image quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a sensor is provided at a bezel part to measure display characteristic, then display image quality adjustment can be performed, but it is difficult to reduce the size and weight of tablet terminal

Engineering Contradiction:

Improvedisplay image quality adjustmentVSAvoidtablet terminal weight

Core Design Contradiction:

Manufacturing precisionVSWeight of stationary object

Solution Approach 1:

The patent introduces a cradle as an intermediary device that holds the tablet terminal and contains the optical sensor. The sensor is not integrated into the tablet terminal itself but is provided in the cradle, which serves as a separate measurement and charging station. This allows display characteristic measurement while keeping the tablet terminal lightweight and portable.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system is divided into two separate components: the tablet terminal (which remains lightweight and portable) and the cradle (which contains the measurement sensor). This segmentation allows the sensor to be provided in the cradle rather than in the tablet terminal itself, resolving the contradiction between measurement capability and device weight.

Inventive Principle:

Principle #1Segmentation

2Measurement precision

If a sensor is provided over the display screen to receive display light, then display characteristic measurement is enabled, but a part of display image cannot be seen

Engineering Contradiction:

Improveluminance distribution measurementVSAvoiddisplay visible area

Core Design Contradiction:

Measurement precisionVSArea of stationary object

Solution Approach 1:

The cradle acts as an intermediary measurement platform that positions the optical sensor to receive display light from the tablet screen without requiring the sensor to be integrated into the display area. The sensor is located in the cradle, allowing full display visibility while enabling accurate luminance measurement.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

Instead of placing the sensor on the display device (tablet terminal) which would block the display area, the patent inverts the arrangement by placing the sensor in the cradle that holds the tablet. The measurement is performed from the cradle side, allowing the entire display area to remain visible and usable.

Inventive Principle:

Principle #13The other way round (Inversion)

3Manufacturing precision

If a user manually moves the optical sensor to measure luminance distribution at multiple points, then uniformity correction can be performed, but the measurement process becomes complicated

Engineering Contradiction:

Improveuniformity correctionVSAvoidmeasurement process complexity

Core Design Contradiction:

Manufacturing precisionVSEase of operation

Solution Approach 1:

The cradle is designed to automatically hold and position the tablet terminal in a fixed, predetermined orientation. When the tablet is placed in the cradle, it is automatically positioned at the correct measurement angle and location, eliminating the need for manual sensor movement or complex user operations. The system performs self-positioning through the cradle's fixed structure.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The cradle is pre-configured with the optical sensor at a specific position and angle that corresponds to the optimal measurement point on the tablet display. The tablet terminal is held in a predetermined posture in the cradle, so that when measurement is initiated, all positioning actions have already been performed in advance, simplifying the measurement process.

Inventive Principle:

Principle #10Preliminary action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution enables efficient adjustment of display image quality, reduces the size and weight of the device, and simplifies the measurement process for correcting uniformity, ensuring stable and consistent luminance across the display.

Implementation Method 1

an optical sensor provided on the cradle and capable of receiving display light from the display

Methodology Applied

Scientific EffectOptical detection: Photoelectric Effect

Data Source

PatentUS11763728B2Image display device, display control method, and cradle

Publication Date: 2023.09.19 JVC KENWOOD CORP

AI summary

There are provided an image display device, a display control method, and a cradle that are capable of adjusting display image quality with a simple configuration.An image display device according to the present embodiment includes a tablet terminal having a display, a cradle holding the tablet terminal, and an optical sensor provided on the cradle and capable of receiving display light from the display.