色彩空間體積顯示系統之實現

Abstract

一直以來，色彩在製造生產等各個產業領域中，其地位是舉足輕重的，包含應用於顯示照明領域，或是應用於印刷、紡織及油漆等領域；為了滿足人類對色彩的需求，許多的色彩系統運用文字，或是數值與字母表示色彩名稱，像色彩三刺激值或色票提供在視覺上色彩的比對與辨識。產品設計者都以紙本色票比對顏色，色票之色彩皆需要一個參考光源，在無光源的環境下無法呈現色彩，而且在不同光源下表現的色彩也會有所差異；另一方面，色彩空間是一個三維空間，色彩與亮度會影響人類的色彩感知，因此如CIE 系列色度圖等提供一個色彩與亮度感知之量化方法，但這並不能讓我們看到色彩空間中真正的色點顏色；而且以往之顯示器僅能呈現二維色彩空間，為了要同時呈現二維色彩空間與亮度之關係，所以本論文設計一個新的體積顯示系統之裝置(Volumetric Display Device)，係利用三原色之發光二極體(Light-Emitting Diode，簡稱LED)，利用混色理論為基礎與三原色之色域邊界理論，將色域體積建構在CIE xyY 或L*a*b*色彩空間，將色彩空間或色域體積呈現於LED體積顯示裝置上，並實現一平面顯示裝置驗證此系統。此系統不但可以顯示照明之色域體積與各色點之顏色，並運用於照明顯示之色貌模型，更可以讓我們真實地看到色彩空間所表現的色彩外貌，提供色彩教學與色彩空間展示的媒介展示平台。

Color in manufacturing and other industries always is important and applied to display lighting field, or used in printing, textile and paint, etc. In order to meet the demand of human to the color, many color system using words, or numerical and letters indicate the name of the color. Color tristimulus values or color chip provide methods on the vision of color comparison and identification. Product designers always used color chip to compare and verify the product color. However, the color chip needs a reference illuminant, so in dark environment the color chip can't present color. As well as, in different light source, color also will have difference color appearance. The color space is a three dimensional space because either color or light brightness affect human color perception. Therefore such as series of CIE chromaticity diagram, such as the provision of a color and brightness perception of quantitative method, but does not let us see color space of true color. And has the display can only present two dimension color space, in order to present at the same time two dimension color space and the relationship between brightness. Therefore this paper designs a new volumetric display device, by use the tri-primary colors of Light Emitting diodes (LED). According to theory of mixed color, the multi-primary color gamut boundary theory is applied to construct the color volume in CIE xyY or L*a*b* color space. Then the color volume is implemented in the LED volumetric display device, and one plate of LED display was implemented to test our system. This system not only can show color volume, but also to be proposed to applied for the color appearance model of lighting. This device can make us truly see the true color perception of the lighting color appearance, and provide a good media display platform for the color teaching and the color space showing.