CHAPTER 15 VFD CONTROLLER/DRIVER
324
User’s Manual U11302EJ4V0UM
The light timing of each segment is discussed next. In display example
(3)
in
15.9
, a segment spans two grids
(that is, 2G and 3G, 4G and 5G). Therefore, these segments will be lit at the timing from T0 to T6 as shown in
Figure 15-20.
For example, when “Fast” is to be lit as shown in example
(3)
in
15.9
, the lighting timing must be T5 in Figure
15-20 because the “Fast” segment spans the 4G and 5G grids. In addition, it can be seen from Figure 15-3 that
the “Fast” segment, that is, “i” segment which spans 4G and 5G, can be lit in the T5 cycle.
Figure 15-20. Grid Driving Timing
5G
4G
3G
2G
1G
1 display
cycle
T1
T0
T2
T3
T4
T5
T6
T0
Key scan
timing
Table 15-3. Segment Lighting Timing
Lighting Segment
T0
q, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r13
T1
1b, 1c, j, m, n, o, p
T2
1a, 1g, 1d, i, l
T3
2a, 2b, 2c, 2d, 2e, 2f, 2g, h, k, 1e, 1f
T4
1b, 1c, j, m, n, o, p
T5
1a, 1g, 1d, i, l
T6
2a, 2b, 2c, 2d, 2e, 2f, 2g, h, k, 1e, 1f
Содержание mPD780204
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