| With the improvement of the LED display technology and people’s aesthetic requirements,the traditional LED display product market tends to be saturated.The transparent LED display has the characteristics of light,which will replace the traditional LED display screen occupy the market.Current transparent LED displays have problems such as difficult maintenance,troublesome installation,and low light transmittance.At the same time,most of the current large-format transparent screen display systems cannot meet the needs of interactive intelligence.Therefore,this thesis designs a transparent screen display system based on Android.The transparent screen display system based on Android is mainly composed of mobile terminal,control system and transparent screen.The mobile terminal and the main controller communicate through Wi Fi.The mobile terminal has many functions,which can control the playback and obtain the current playback information.The control system consists of the MCU and the SCU.The MCU is composed of RK3288 processor with Android operating system and FPGA.It has two ways to realize the display.One is to connect with the mobile terminal,RK3288 complete different operations according to different instructions sent by the mobile terminal,the second is to connect the device to set to generate video data suitable for the transparent screen.FPGA mainly converts parallel video data sent by RK3288 processor into serial data,and then transmits it to the SCU through optical fiber.The SCU restores and selects the received video data and then transmits it to the connector.The video data is also forwarded to the next SCU through optical fiber to realize the cascade connection between the SCU and the SCU.The connector drives a small size transparent screen display through FPC.Multiple SCUs and connectors are cascaded to realize splicing of multiple small-size transparent screen,thus large-scale transparent screen display is realized.This thesis studies and designs the transparent screen display system based on Android in hardware and software,tests the system,and gives the system physical picture and display effect picture.The correctness and availability of the system design are verified.The display system can achieve a maximum of 1024 × 768 resolution,60 frame rate video display,realize the intelligent interaction and enhance the sense of beauty and convenience of the transparent screen in practical application. |
