Principles and categories of 3D display technology
The naked eye 3D LED advertising display technology combines the latest human LED panel manufacturing technology and LED controller software technology. Through computer image processing technology, the parallax between the left and right eyes of the existing 2D image and 3D image is converted into a parallax 3D image. The LED screen is flat 2D. The reason why people can enjoy real 3D images or videos is that the grayscales of the images displayed on the LED display screens are different, which makes the human eye produce a visual illusion and perceive the displayed 2D images as 3D images. The LED naked-eye 3D display technology separates the left and right images by adjusting the light angle and transmits them to the left and right eyes of the viewer respectively to achieve a 3D effect. LED naked eye 3D display technology currently mainly includes grating type, cylindrical lens type, holographic projection type, volume type, time division multiplexing type and so on.
The essence of naked eye 3D LED display and the evaluation standard of 3D LED display
The currently popular naked-eye 3D LED display is accurately described as "naked-eye 3D LED display effect". Its essence is a naked-eye 3D effect formed by a 2D LED display screen and a special 2D video content. The naked-eye 3D-LED display is to add some optical structure to the display, so that the rendered image enters the human left and right eyes to produce parallax, and you can see the 3D picture without wearing any special glasses or other equipment. The quality of the naked-eye 3D LED display can be judged from the two dimensions of viewing distance and content. In different installation environments, the dot pitch of the display screen determines the viewing angle and viewing distance of the viewer. The higher the clarity of the content, the more video content can be displayed.
Compared with traditional LED display, outdoor 3D LED display has different points and difficulties in software and hardware
In order to present the best display effect, the LED naked-eye 3D display should support high-definition, high-color-depth video coding in the software, and can be adapted to play on atypical screens such as polygons or curved surfaces. In terms of hardware, naked-eye 3D LED displays pay more attention to detailed images, so displays have higher requirements for grayscale, refresh rate, and frame rate. The difficulties are mainly reflected in several aspects:
(1) Content design and creativity that will produce parallax;
(2) The fusion of 3D LED display color and ambient light;
(3) The integration of 3D LED display installation structure and installation scene.
(4) The video content to be played is customized according to the resolution of the display screen, and the price is relatively high.
Outdoor 3D LED screens new requirements for all links of the 3D LED screen industry chain
Mainly brightness and driver IC. During the day, the ambient light (especially at noon) is relatively high, and the brightness of the 3D LED display needs to be ≥6000 nits to ensure normal viewing. At night, the display should be lowered according to the ambient brightness. The naked-eye 3D LED screen needs to use a PWM driver IC with current gain, which can not only ensure the best picture quality, but also ensure that the audience will not experience insufficient refresh during shooting. The main challenge of 3D LED display manufacturers is the display effect and high performance of 3D LED display, including IC, LED display control system, broadcast control software and creative content design. For the 3D LED display driver chip, the hardware configuration must be matched with a driver chip that supports high grayscale and excellent ultra-low grayscale, 3840Hz high refresh rate, HDR high dynamic contrast, and low power consumption in order to present realistic and shocking 3D immersive pictures.
The difference in cost or selling price between outdoor naked eye 3D LED screen and ordinary LED screen
The corresponding cost or price will increase. Compared with ordinary display screens, the difference in driver ICs is slightly more obvious. Generally, high-brush ICs are 2-3 times that of ordinary ICs. The improvement of hardware specifications should have an impact on the cost or selling price of 3D LED screens. It also depends on the location of its application device and the creative content being played.