238
11 Applications of LEDs
research and development has reached 1 mm or less. The key technology to improve
pixel density and realize high-definition display is to realize ultra-small illuminating
pixels, that is, smaller-sized LED full-color illuminating units. By properly arranging
the internal structure of the LED chip and packaging structure, the size of the pixel
can be effectively reduced.
A display module is formed by encapsulating a number of LED lamp beads on a
substrate as illustrated in Fig. 11.4. Several modules are assembled to form an LED
matrix unit. The back side of each LED display matrix unit has a corresponding drive
circuit and components for attachment to the connection. According to the required
LED screen area, a certain number of LED matrix units are assembled into a whole
LED display screen as shown in Fig. 11.5.
LED display drive control: The current injected into each pixel unit of the LED
display can be individually controlled. The pixels synthesize various characters,
numbers, graphics and images on the display screen under the action of the driving
signal [17]. LED display driver control system mainly includes data transmission,
processing module, scanning control and display driver module. In order to improve
the display quality and user comfort, the brightness correction of LED display screen
and the light color consistency of the display screen are the key issues to be considered
in the driver control part.
Fig. 11.4 A display module consisting of multiple LEDs
11 Applications of LEDs
research and development has reached 1 mm or less. The key technology to improve
pixel density and realize high-definition display is to realize ultra-small illuminating
pixels, that is, smaller-sized LED full-color illuminating units. By properly arranging
the internal structure of the LED chip and packaging structure, the size of the pixel
can be effectively reduced.
A display module is formed by encapsulating a number of LED lamp beads on a
substrate as illustrated in Fig. 11.4. Several modules are assembled to form an LED
matrix unit. The back side of each LED display matrix unit has a corresponding drive
circuit and components for attachment to the connection. According to the required
LED screen area, a certain number of LED matrix units are assembled into a whole
LED display screen as shown in Fig. 11.5.
LED display drive control: The current injected into each pixel unit of the LED
display can be individually controlled. The pixels synthesize various characters,
numbers, graphics and images on the display screen under the action of the driving
signal [17]. LED display driver control system mainly includes data transmission,
processing module, scanning control and display driver module. In order to improve
the display quality and user comfort, the brightness correction of LED display screen
and the light color consistency of the display screen are the key issues to be considered
in the driver control part.
Fig. 11.4 A display module consisting of multiple LEDs