■口口 ■自日口 口口口 口口口 日口 日口 口口口 百口 口■ 口口口 百日口口口口口 日口■口口 口 X1×2X3 自口口口口 (a 口 口口 FIGURE 83.9 Matrix displays. (a)One LEd will be turned on by applying the proper signal to one x axis and one y axis. (b) Character generation using column strobe methods. Source: S. Gage et al., Optoelectronics/Fiber-Optics Applications Manual, 2nd ed, New York: Hewlett-Packard/McGraw-Hill, 1981, pp 2.25, 5.44. With permission 图 日日口 FONT A: 7-SEGMENT FONT C: 16-SEGMENT FONT E: 5x7 DOT MATRIX FONT GLASS WINDOW ATED CIR NTRAST 接 ETIC SEAL AT EXTERNAL L BACK CERAMIC SUBSTRATE URE 83.10(a)Display fonts used in LED displays.( b) Construction features of a hermetic LED display.( Source: S iage et al, Optoelectronics/Fiber-Optics Applications ManuaL, 2nd ed, New York: Hewlett-Packard/McGraw-Hill, 1981, Pp 5.3, 5.6. with permission. display is adequate for hexadecimal applications, but the 16-segment is required for alphanumerics. To limit pin-out requirements, the LEDs of a single package are connected in either the common anode or commor cathode configuration Fig 83. 11(a)), with multiple display digits multiplexed as illustrated in Fig. 83. 11(b) e 2000 by CRC Press LLC© 2000 by CRC Press LLC display is adequate for hexadecimal applications, but the 16-segment is required for alphanumerics. To limit pin-out requirements, the LEDs of a single package are connected in either the common anode or common cathode configuration [Fig. 83.11(a)], with multiple display digits multiplexed as illustrated in Fig. 83.11(b). FIGURE 83.9 Matrix displays. (a) One LED will be turned on by applying the proper signal to one x axis and one y axis. (b) Character generation using column strobe methods. (Source: S. Gage et al., Optoelectronics/Fiber-Optics Applications Manual, 2nd ed., New York: Hewlett-Packard/McGraw-Hill, 1981, pp. 2.25, 5.44. With permission.) FIGURE 83.10 (a) Display fonts used in LED displays. (b) Construction features of a hermetic LED display. (Source: S. Gage et al., Optoelectronics/Fiber-Optics Applications Manual, 2nd ed., New York: Hewlett-Packard/McGraw-Hill, 1981, pp. 5.3, 5.6. With permission.)