3D Visual System
3D technology can be classified into two categories: eyewear and naked eye. Naked eye 3D requires the use of lenses, gratings, lasers, and other devices, mainly used in public business occasions. Small 3D displays will be applied to portable devices such as mobile phones, relying on the distance between human eyes to view light in different directions to generate 3D vision. Large LED display screens cannot achieve true naked eye 3D functionality due to the divergent light emitted by LED tubes. Some research institutions have conducted research on adding a refractive film in front of LED display screens, which has slightly formed a certain naked eye 3D effect. However, it has great limitations on viewing angle, distance, and field of view, and does not have practical value. According to these characteristics of 3D display, in the field of household and civilian consumption, whether it is a monitor, projector, TV, or even LED display screen, it needs to be used in conjunction with 3D glasses.
As a leading LED display provider in the country, Kunjing Optoelectronics, with its consistently leading innovation and development capabilities, provides users with the most suitable 3D display solutions for LED displays. Our 3D display control solution mainly adopts active shutter 3D imaging technology.
◉ Principle of Active Shutter 3D Imaging
The main reliance of active shutter 3D technology is on LCD glasses to achieve stereoscopic imaging. Its lenses are essentially two LCD screens that control opening/closing. The LCD layer in the eyes has two states: black and white, which are usually displayed as white or transparent. When powered on, it will turn black. Through a signal transmission device, precise synchronization is achieved between 3D glasses and the screen. Simply put, active shutter 3D technology is the process of continuously high-speed opening/closing the lens to achieve 3D stereo imaging.
The advantages of active shutter 3D technology include fewer residual images, prominent 3D effects, the ability to achieve full HD 3D output, and lower screen costs. This technology can be imported with only an update refresh rate of 120 Hz.

◉ System Architecture
◉ Solution Equipment Support
Kunjing Optoelectronics has achieved active shutter style 3D display on ordinary LED screens through research and development. The basic principle is: The film source in left and right format or up and down format is played on a computer display, with a refresh frame rate of 60Hz. The 3D splicing processor doubles the frequency to 120Hz, and the left and right eye data is transmitted to the 3D transmission card. The 3D transmission card converts it into display data for the receiving card, and sends the signal for switching the left and right eye data to the 3D glasses synchronizer. On a regular LED display screen, the number of carrier points on the receiving card is reduced to meet the frame rate requirement of 120Hz. In addition, due to the characteristics of LED display screens, the receiving card will increase the display refresh rate to 1920H-3840Hz or above, so that there is no flickering sensation when watching 3D effects. Its advantage is that the cost of LED display screens is the same as that of ordinary LED display screens, without increasing the production and installation costs of the display screens. The technology of video signal processing and LED control system is mature, and the use of 2.4GH 3D synchronizer and glasses can avoid the disadvantages of short distance and obstruction of infrared glasses. According to the number of pixels on the display screen, configure the 3D splicing processor, LED display screen 3D sending card, and LED display screen receiving card: 1. If the number of display points is less than 1280 * 800, a two in one video processing transmitter and an appropriate number of regular receiving cards can be used to complete the 3D display. 2. If the width of the display screen points is greater than 1280 points, or the height is greater than 800 points, an additional 3D splicer is required. Depending on the number of pixels, a 2-pin, 4-pin, or 8-pin 3D splicer is used. Multiple 3D four port transmission cards or 8-port transmission cards can be connected to the splicer, and each transmission card can control 1.3 to 2.5 million points. 3. The display screen adopts the same receiving card as the regular display screen. When using 3D, in order to ensure a higher refresh rate, it is recommended to reduce the loading width of the receiving card by half compared to the regular display screen.
Kunjing Optoelectronic Technology Co., Ltd
Address: Fuqiao Second Industrial Zone, Heping Community, Fuhai Street, Bao'an District, Shenzhen
Phone: +86-13823782484
Email: kunjin-don@hotmail.com
Website: www.kunjingled.com
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