A method of compensating a colour intensity of an illumination unit of a vehicle display apparatus

The method employs a color controller to calibrate and compensate sub-pixel color intensity in vehicular displays, addressing hardware and manufacturing variations, and achieves improved image quality and contrast ratios by adjusting color channels and weights, thus overcoming the challenges of achieving high contrast ratios and uniform illumination.

EP4524948A1Pending Publication Date: 2025-03-19CONTINENTAL AUTOMOTIVE TECHNOLOGIES GMBH
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Patent Information

Application Number
EP2024199949
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-09-12
Filing Date
2024-09-12
Publication Date
2025-03-19

AI Technical Summary

Technical Problem

The challenge in designing vehicular display apparatus lies in achieving high contrast ratios and uniform color illumination, which is affected by hardware and electronic component variations, such as LED binning and manufacturing-induced birefringence, leading to manufacturing wastage and suboptimal image quality.

Method used

A method using a color controller to individually calibrate and compensate the color intensity of sub-pixels through a multiple light source module, executing color compensation and reproduction commands to adjust color channels and weights, and performing optical inspections to address variations in LED bins and LCD materials, thereby achieving a high contrast ratio and improved image quality.

Benefits of technology

This approach effectively calibrates color intensity to achieve a white point color, reduces manufacturing rejection rates, and fine-tunes manufacturing variations, resulting in enhanced image quality and contrast ratios in vehicular displays.

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Abstract

Disclosed is a vehicle display apparatus and a method of compensating a colour intensity of a vehicle display apparatus. The method includes receiving, by way of a colour controller, an input colour signal for each display pixel of a display panel of a vehicle display apparatus; and illuminating, by way of a multiple light source module, light rays through the display panel. In response to the input colour signal received, the colour controller is further operable for executing a set of instructions stored thereon comprising: (a) a colour compensation command for individually calibrating a colour channel of at least one of the multiple light sources for illuminating light rays through at least a sub-pixel of a sub-pixel of a display pixel of the display panel; and / or (b) a colour reproduction command for individually calibrating an input colour signal for changing a colour intensity of at least a sub-pixel of a sub-pixel of a display pixel of the display panel.
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