lcd module displays can automatically adjust the brightness of lights

Since last year, the Haikou Municipal Engineering maintenance company will Haifu, White Dragon Road, Guangdong Road and other roads 400W 250W street lights replaced all energy-efficient lamps, 1000W's switch from 400W, these are the new generation of high-pressure 20x4 lcd sodium lamps, matching new electronic vibration converter, can automatically adjust the brightness of lights, such as late at night due lcd module displays to less electricity voltage is increased, the flow is regulated by an electronic oscillator power is reduced brightness. In a move to ensure that the next major urban roads does not reduce the brightness Coding System lcd module of streetlights premise, to achieve energy-saving more than 40%.Haikou Municipal Engineering maintenance company is also responsible for the custody of more than 140 buildings landscape lighting, landscape lighting facilities in all of these energy-efficient LED cold light source, the company strictly control the lighting lcd module displays landscape lighting facilities run time, just before opening night at the holidays, night time lighting for 3 hours. To alleviate the current power shortage situation Hainan, the company has now requested the electricity sector, all closed city landscape lighting tube to September.

showing the stability of the lcd module displays the power supply design

control commands via the interface is input to the control command decoder decodes the command, and then outputs the clock, horizontal sync, vertical sync signal, thereby controlling the oscillation frequency of the OLED display, the ranks of the display device, and a COG LCD Display voltage conversion module OLED display contents offset drive module; if the display data (128 × 64bits), then the display data to the control circuit via GDDRAM MCU interface input buffer, then the local color decoder decodes the data, and finally displays the decoded data through the line driver to drive lcd module displays showing the stability of the Serial display modules the power supply design
Hardware architecture design diagram shown in Figure 2, the external hardware circuit DC-DC converter uses TPS7333 chip 3.3V to 5V power into power, and the power signal output voltage and current through the entire SSD1303 controller voltage and current. The entire system needs 3.3V and 12V power supply, MCU (paper, C8051F023) requires a supply voltage of 3.3V, OLED requires 3.3V logic supply voltage and a driving power supply 9 ~ 12V, the voltage of the driving power from an external power converter circuits.