Planar EL552.256-Q2 manual Specifications, Avoiding Burn-In, Power-up Sequence

EL552.256-Q2

Avoiding Burn-In

As with other light emitting displays, displaying fixed patterns on the screen can cause burn-in, where luminance variations can be noticed. Use a screen saver or image inversion to avoid causing burn-in on the display.

Specifications

The EL panel is a matrix structure with column and row electrodes arranged in an X-Y formation. Light is emitted when an AC voltage of sufficient amplitude is applied at a row-column intersection. The display operation is based on the symmetric, line-at-a-time data addressing scheme.

Performance characteristics are guaranteed when measured at 25 °C with rated input voltage unless otherwise specified. Planar does not recommend operation of the display outside these specifications.

Power-up Sequence

This display requires simultaneous 12V and 5V input in addition to video signals for proper operation. It is important that your design provides these signals simultaneously. If these signals are not simultaneous, they must meet the sequential timing shown in Figure 1 below.

VL	5V
	0V
Logic	t1≥0
Signals
	0V
	12V
V H	t2≥0
	0V

Figure 1. Power Supply and Logic Signal Sequencing

t1≥0

t2 ≥0

Note: To ensure the long-term reliability of the display, the proper power- up sequence must be used and the minimum and maximum specifications in this manual should be met without exception.

All internal high voltages are generated from the display supply voltage (VH). The logic supply voltage (VL) should be present whenever video input signals or

4EL552.256-Q2 Operations Manual (OM410-00)