Blu-ray function and characteristics of intelligent LED display

Blu-ray intelligent display use and Avago HCMS - 29 xx intelligent display yellow, orange light, red light and green light products of the same ASIC, and packaging size and pin arrangement and HCMS - 29 xx series of the same, it USES serial interface point of 5 x7 matrix. Within these high-performance dot matrix display screen by CMOS chip hidden in circuit boards, each screen can directly and microprocessor or micro controller connection, to waive the additional demand of interface device. Serial interface can be displayed by the fewest number of connections to bring more number of words, use common display format readable 5 x7 pixels can also display case Roman letters, katakana and other fixed by the users themselves righteous symbol or character. The blue screen on the design can be vertical or horizontal stack, very suitable for multiple characters for display applications.

Blu-ray intelligent display screen and other Avago intelligent display products is particularly close to the characteristics of the main difference is the blue LED high quality color performance, while the other is for some small differences on the parameters.

, same as other intelligent display blu-ray intelligent display is also used by two independent power system, including a display as a logic circuit power supply, another is to provide a display for the LED power supply. With two power system can keep the logic circuit power supply of pure, and can independently control the LED and logic circuit voltage, LED the voltage can be changed between 0 V ~ 5.5 V without affecting point matrix or control registers.

For the blue LED, the voltage can be changed between 4.5 V ~ 5.5 V and will not have any significant impact to light output, or bring unpleasant as differences. Basically, the LED voltage not less than 4.0 V, the reason is that blue light leds have higher than traditional use of GaP technology color sequence to the voltage; Logic can be between 3 V ~ 5.5 V voltage changes without affecting the display information or strength, work under lower than 4.5 V will influence the timing and logic level, if less than 3 V, may cause the change of content of matrix and control registers.

Blu-ray intelligent display can provide two ways to change the brightness, pixels of peak current controlled respectively, and the use of pulse width modulation, this function can control block as shown in figure 1 0 D0 to D5 bits for setting. In addition, do not recommend through to the power supply voltage of the LED PWM to control the brightness of the display screen.