Abstract: This white paper explores Texas Instruments' unique global BrilliantColorTM technology. The technology has been innovative in image processing, in addition to enhancing the optical efficiency of the DLP® projection system, extending the current RGB color wheel. Extreme ColorTM technology can also be combined with the new color wheel design to go beyond the traditional three primary color system to achieve a wider color gamut in DLP display systems. These innovative features give OEM (Original Equipment Manufacturer) manufacturers more opportunities to produce brighter displays with unique color gamuts that no other competitive technology can match. Other advantages of Extreme ColorTM technology Customized PVC Bluetooth Charger Shenzhen Konchang Electronic Technology Co.,Ltd , https://www.konchang.com
Introduction
Most display devices used in the past used three primary colors: red, green, and blue. The combination of the three primary colors can display all the colors in the triangle enclosed by these three colors (see Figure 1). This limits the range of colors that can be displayed.
Color gamut of a normal TV or projector
Bright yellows and cyan, which are common in nature, are hard to show.
Currently, the color gamut of all consumer-grade display systems cannot balance color gamut and brightness. You can increase the gamut range by increasing the saturation of the three primary colors. The saturated primary color shifts the red, green, and blue points of the triangle closer to the edge of the visible spectrum, increasing coverage. However, since the saturated primary color is generally not bright, the use of a saturated primary color reduces the overall brightness of the white and saturated colors. If you add yellow, cyan, and magenta to your image, you can get darker red, green, and blue dots while maintaining white spot brightness.
The three primary color gamuts have been used quite successfully in CRT display technology. A similar approach was used in the first generation DLP® display system, which decomposed the image into red, green and blue components and displayed on a digital micromirror chip (DMD).
Factors affecting display brightness
In a light bulb based display system, several factors can affect the final brightness of the display. Figure 2 depicts the light path of a typical DLP® display.
DLP® optical path
Factors that affect the brightness of the display include the lumen value of the bulb, the efficiency of the light system, the efficiency of the color wheel, and the efficiency of the display. In short, the brightness of the screen is the efficiency of the optical system multiplied by the lumen value and the screen gain value. Increasing the efficiency of any section of the light path can increase the brightness of the screen.
<br> <br> based illumination efficiency lamp when the display image of the display white lamp spectrum decomposed into three primary colors: red, green, and blue. In order to get the standard color gamut required by televisions and projectors, the generation of red, green and blue does not use the full energy spectrum of the full light. This loss is due to the fact that the energy of some of the lights is outside the range of red, green and blue filters (see Figure 3).
Spectral energy distribution of a bulb
Extreme ColorTM technology solves this problem by using additional filters. As can be seen from Figure 3, the bulb energy is not fully utilized at the 580 nm wavelength. This energy can be regained by using a yellow filter. Also, the cyan filter can increase the efficiency in the 500 nm region. Designing a projection system that uses five-color illumination (red, blue, green, yellow, and blue) can increase the final brightness by up to 50%. Table 1 shows the improvements that can be achieved with the new .45 720p DMD and five-color wheels in the DLP® display system.
Extended color gamut
In addition to improving system lighting efficiency, Extreme ColorTM technology also broadens the color gamut. The color gamut of the red, green, and blue displays is a triangular region, and the three vertices are determined by the chromaticity values ​​of the red, blue, and green filters, respectively. Any color that the system can display is a mixture of red, green and blue. Although this color space is sufficient for many applications, it does not perform bright yellow and cyan. This is because the bright yellows and cyans we often see in nature are beyond the scope of this triangle. Adding extra colors allows us to expand the triangle into a larger polygon, and the available colors increase. Figure 4 depicts the triangle of the Rec. 709 color standard used by many television sets today. By using the Multi-primary color wheel and Extreme ColorTM technology, we can extend the color gamut to the outer polygon (dashed line).
Extreme ColorTM Color Gamut
This new color gamut represents the richer colors of nature than most of today's display systems. The new color gamut also better balances chromaticity and brightness, presenting the most realistic colors, giving viewers a wonderful visual experience.
Improve color gamut with RGB color wheel
Color processing can also be improved using the Ultimate ColorTM technology on traditional red, green, and blue (RGB) color wheels. All color wheels have a transition zone between different color filters. When the transition area illuminates the DMD, the color processor is not able to determine which color of light is on the DMD. For example, when the red/green spoke illuminates the DMD, the DMD only sees a mixture of red and green light.
Color processing can make good use of this situation. Red plus green produces yellow. Similarly, red plus blue produces magenta, while blue plus green produces cyan (see Figure 5). In this case, the yellow, magenta, and cyan dots are located within the triangular gamut of the red, green, and blue filters (because these colors are a mixture of the two colors in the gamut). This is slightly different from adding a new color point outside the triangle area to form a multi-primary color wheel.
RGB color wheel and spokes
The Extreme ColorTM technology treats the spoke area into a composite color (ie, treating the green/red spokes into yellow). The color processor can use yellow, cyan, and magenta to increase the brightness of the display so that a more saturated primary color can be used (see Figure 6).
RRGB color wheel brighter color gamut
In addition to improving lighting optical efficiency and broadening color gamut, Extreme ColorTM technology further improves the image quality of DLP® displays.
The Extreme ColorTM calculation uses a floating point algorithm. Unlike traditional fixed-digit color calculations, the Ultimate ColorTM calculation uses a floating-point algorithm to ensure the accuracy of the calculation. This reduces the noise and the displayed colors are more realistic. Improved calculation accuracy and widened color gamut for DLP® projection systems with Extreme ColorTM technology for more than 200 trillion colors.
In addition, Extreme ColorTM technology is extremely flexible, allowing OEMs to tailor the color performance of their displays to their own needs and compete in the marketplace.
in conclusion
Extreme ColorTM technology is designed to enhance the optical efficiency of the DLP® display engine. For UHP bulbs, this technology can increase brightness by 50% over traditional three-color solutions. The use of six colors can broaden the color gamut and faithfully reproduce the colors of nature more than the three-color scheme, giving viewers an immersive experience.