Lcd Latch
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 D610 LCDLATCH Dell LCD Screen Latch Lat D610  US $53.95
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 91P9830 IBM Lenovo LCD Screen Latch Tp W Spring US $53.95
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 8M669 LATCHES Dell LCD Screen Latch Kit US $53.95
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 V000912750 Toshiba LCD Screen Tos Latch US $45.95
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 LCD latch for Fujitsu C6631 C7631 C6611 US $45.00
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 LCD latch for Fujitsu C6631 C7631 C6611 US $45.00
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 Dell Latitude D610 14 SXGA LCD Hinges Bad Clip Latch US $44.99
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 Fujitsu LifeBook T3010 LCD Latch External CP173905 US $40.00
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 Fujitsu LifeBook T3010 LCD Latch Internal CP173906 US $40.00
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 P000391710 Toshiba LCD Screen Tos Latch Knob A40 Sxxx Satellite A40 US $34.95
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 P000393990 Toshiba LCD Screen Tos Latch Button Model US $34.95
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 LCD latch for Fujitsu S7020 S7020D p n CP233477 US $34.00
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 SONY VAIO PCG R505 Complete 121 LCD Assembly w HingesLatchInverter Cover US $33.99
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 4 642 807 01 Sony LCD Screen Latch Pcg Xg28 US $33.95
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 GN141 Dell LCD Screen Latch Hook For Latitude E6400 US $33.95
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 UF171 Dell LCD Screen Inspiron 6400 Latch Hook With Spring US $33.95
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 464280701 SONY LCD Screen Latch Pcg Xg28 US $33.95
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 J9620 Dell LCD Screen Lat D600 Latch US $33.95
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 PM503 Dell LCD Screen Inspiron 1520 Latch Assembly US $33.95
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 NEW DELL GN215 LCD Latch Kit For Latitude E6400 US $32.77
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 Lof of 4 HP Compaq Presario 2100 Laptop 15 LCD Back Cover Lid Latch US $30.59
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 Toshiba Satellite A205 A215 Laptop LCD LID THUMB LATCH US $24.96
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 P000221250 Toshiba LCD Screen Tos Latch Spring Portege 6 US $24.95
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 Toshiba Satellite P105 LCD LATCH ASSEMBLY A000005990 US $24.40
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 LCD latch for Fujitsu P Series p n CP111021 US $20.00
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 Fujitsu LifeBook T4010 T4020 LCD Lower Latch CP211040 US $20.00
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 DELL XPS M1710 LCD Back Cover w Latch 0RG723 RG723 US $20.00
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 TOSHIBA SATELLITE 3000 S3000 Series LCD Back COVER K000810430 WITH LATCH US $19.99
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 MPC Transport T1200 141 LCD Back Cover Lid Latch US $19.99
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 Compaq Presario 1400 Laptop LCD Parts Lid Latch US $19.99
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 Toshiba Satellite A130 A135 Laptop LCD LID THUMB LATCH US $19.79
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 Toshiba Satellite A135 Laptop LCD HOOK LATCH K000043950 US $19.78
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 Toshiba Satellite 1950 1955 Laptop LCD LID HOOK LATCH US $19.76
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 Sony Vaio VGN FS FS950 Laptop LCD LATCH SPRING ASSEMBLY US $19.74
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 Toshiba A50 A55 Satellite Laptop LCD LID LATCH Assembly US $19.50
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 Sony Vaio PCG FX FX240 FX390 Laptop LCD LID HOOK LATCH US $19.26
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 Gateway 450ROG 450SX4 450POG LCD laptop lid latch catch lock kit US $18.99
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 TOSHIBA SATELLITE M65 S821 171 LCD LATCH US $18.99
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 GREEN733 LAPTOP LCD Parts Lid Latch Spring US $18.99
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 Dell Smartstep 200N Laptop 15 LCD COVER LID LATCH 5T630 US $18.99
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 Sony Vaio VGN A240B LCD Back CoverWiFiLatch 2 050 867 US $18.59
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 Acer Extensa 4420 141 LCD Lid Latch Spring US $16.99
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 Sony Vaio PCG V505ECP LCD LATCH VIDEO CABLE ANTENNA US $16.99
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 TOSHIBA SATELLITE P15 S409 LCD Back Cover Lid Latch US $16.99
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 IBM THINKPAD A31 A31P 15 LCD BACK COVER LID LATCH US $16.99
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 Fujitsu LifeBook P7010D LCD Latch CP188977 XX US $15.00
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 Fujitsu LifeBook S2110 S6240 LCD Latch CP188489 US $15.00
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Basic Elements Of Seven Segment LED Displays
Even though LCD displays are often preferred because of their low power requirements, lower costs, and straightforwardness of designing into a circuit, the standard 7-segment display is still widely utilized in a substantial number of applications because of their higher temperature range, visibility, bright colors, and wide viewing angle. The 7 segments in a basic LED display are customarily labeled as: a, b, c, d, e, f, g and also dp, where dp is the decimal point. So a total of 8 control lines are wanted to turn each one of those segments off or on individually by connecting to one end of each of these segments and the decimal point.
There are two variations of seven segment displays available, the "common anode" and the common-cathode. The common-anode display configuration has all anodes for each LED wired in common which is then typically connects to the positive voltage supply. The cathode ends of each LED are individually connected to the control lines which become current sinks that are switched on and off thru transistors or an LED driver chip. In a common cathode, the common cathode is routinely hooked up to ground, and the control lines for each segment are current sources which are used to switch on and off individual segments.
So a 7 segment and decimal point package will only require nine pins, but they typically come in 10-pin packages as the common pin is wired into 2 pins. Since every one of the segments acts as a forward-biased light emitting, a current limiting resistor is required between the driver transistor and the LED segment to limit the maximum current flow to a safe value.
An IC driver chip such as the 74LS47 may be employed for common-anode LED types, while a 74LS48 is can be used for common cathode LED types. Most driver chips, for example the MC14511 have a decoder built in, so a binary number input is converted to the seven segment control format.
Some driver chips, for example the CAT4008 or CAT4016 from Catalyst Semiconductor, Incorporated, update the 7 segment control format via a latch attached to a shift register, where the binary info is clocked in serially using a single data spin.
A single LED driver chip can drive more than one 7 segment display by a strategy called "multiplexing." In this technique, the additional displays are connected in parallel, while the "common" line is taken out separately from each display and connected to a switching circuit which turns each line (and hence each display) on and off for a few milliseconds in sequence for each display. This lowers the pin count, but has some disadvantages, eg lower brightness and flickering displays.
Embedded Adventures is a great website to get information about microcontrollers as well as useful modules such as a 7 segment LED display, or an alphanumeric LED display.
Dell Latitude D630 screen latch
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