The principle, type and application of seamless splicing technology

The seamless splicing technology is a special, relatively high-demand projection display application, which can realize splicing technology in which multi-screen images are fused together and the splicing gap is minimized to completely overlap. The seamless splicing technology not only requires a complete super-slim screen, but also has special requirements for the projection used for projecting an oversized picture. The biggest difference between seamless splicing technology and BSV liquid crystal splicing technology is the small gap. The development of seamless splicing technology has gone through three phases: pure hardware integration technology, pure software integration technology and software and hardware integration technology. Pure hardware fusion technology fuses images through optical shading. Pure software fusion technology uses electronic circuit processing to complete image fusion. Software and hardware integration technology refers to both optical shading and electronic fusion processing. Since the hardware fusion can better deal with the black balance of the fused image, and the software fusion can better deal with the white balance of the image, the combination of the two software and hardware technologies can perfectly achieve the true reproduction of the fusion part of the color image. From the splicing effect, the seamless splicing technology has also gone through three stages of development: hard-edge splicing, overlapping splicing and soft-edge splicing. The hard edges are spliced ​​with distinct dividing lines (ie, physical patchwork), and the panoramic integrated display cannot be realized. The overlapping and splicing means that the images projected by the two projectors are overlapped at the merging position, but this splicing obviously exists. Due to the superposition of brightness, the joints have the disadvantages of over bright areas, affecting the realization of seamless effects. The soft edge fusion splicing is processed by the edge fusion technology, which not only realizes the complete fusion of the two sides, but also eliminates the over bright areas caused by overlapping splicing, and the soft edging fusion splicing can adapt to the mosaic of various surface shapes such as plane, cylinder, sphere, and the like. With more extensive applicability, whether soft edge fusion splicing technology is currently mainstream technology is also the future development direction.

species

The large-screen display wall hard-splicing technology is mainly formed by splicing multiple boxes, such as a CRT rear-projection display wall, an LCD rear-projection display wall, a DLP rear-projection mosaic wall, and a plasma display wall, and the like. It can be as small as 0.5mm or less, because the gap is very small, so everyone is also called "seamless" stitching, but there is actually a gap. The projector splicing using the edge fusion technology uses multiple projections to make a projection mosaic on a large projection screen in a 1×N or M×N mode. The splicer is a large-screen splicing system, a large-screen projection system, a projector is projecting a large screen, a projection rear-projection splicing screen system, a CRT video wall system, a plasma splicing system, a liquid crystal splicing wall system, a PDP seamless splicing system, a television The core equipment of the wall assembly system can be connected to BSV, Barco, MITSUBISHI, chirstie, Panasonic, Sanyo, InFocus, Philips, NEC, CMO, VTRON, GQY, TCL, Changhong, Xoceco, Hisense, Haier and other large-screen display devices. Can be divided into the following categories: 1, pure hardware fusion technology is to blend images through optical shading. 2, pure software fusion technology is to complete the image fusion through electronic circuit processing. 3, software and hardware integration technology refers to both optical shading fusion processing, and electronic fusion processing.

Field of application

Widely used government, military, public security, traffic police, armed police, firefighting, electricity, telecommunications, water conservancy, minerals, energy, education, civil air defense, weather bureau, seismology bureau, planning, medical treatment, scenic spot management, digital city, expressway, rail transit , bridge monitoring and so on.