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参数资料
| 型号： | SCDV5542 |
| 元件分类： | 显示用LED |
| 英文描述： | 5X5 DOT MATRIX DISPLAY, SUPER RED, 3.2 mm |
| 封装： | ROHS COMPLIANT, PLASTIC, DIP-14 |
| 文件页数： | 3/16页 |
| 文件大小： | 675K |
| 代理商： | SCDV5542 |
SCDV5540, SCDV5541, SCDV5542, SCDV5543, SCDV5544
2006-01-23
11
Optical Considerations
The 3.2 mm (0.123") high character of the SCDV554X gives read-
ability up to five feet. Proper filter selection enhances readability
over this distance.
Using filters emphasizes the contrast ratio between a lit LED and
the character background. This will increase the discrimination of
different characters. The only limitation is cost. Take into consider-
ation the ambient lighting environment for the best cost/benefit
ratio for filters.
Incandescent (with almost no green) or fluorescent (with almost no
red) lights do not have the flat spectral response of sunlight. Plas-
tic band-pass filters are an inexpensive and effective way to
strengthen contrast ratios. The SCDV5540/2 are red/super-red dis-
plays and should be matched with long wavelength pass filter in
the 570 nm to 590 nm range. The SCDV5543/4 should be
matched with a yellow-green band-pass filter that peaks at
565 nm. For displays of multiple colors, neutral density grey filters
offer the best compromise.
Additional contrast enhancement is gained by shading the dis-
plays. Plastic band-pass filters with built-in louvers offer the next
step up in contrast improvement. Plastic filters can be improved
further with anti-reflective coatings to reduce glare. The trade-off is
fuzzy characters. Mounting the filters close to the display reduces
this effect. Take care not to overheat the plastic filter by allowing for
proper air flow.
Optimal filter enhancements are gained by using circular polarized,
anti-reflective, band-pass filters. The circular polarizing further
enhances contrast by reducing the light that travels through the fil-
ter and reflects back off the display to less than 1%.
Several filter manufacturers supply quality filter materials. Some of
them are: Panelgraphic Corporation, W. Caldwell, NJ; SGL Homa-
lite, Wilmington, DE; 3M Company, Visual Products Division, St.
Paul, MN; Polaroid Corporation, Polarizer Division, Cambridge,
MA; Marks Polarized Corporation, Deer Park, NY, Hoya Optics,
Inc., Fremont, CA.
One last note on mounting filters: recessing displays and bezel
assemblies is an inexpensive way to provide a shading effect in
overhead lighting situations. Several Bezel manufacturers are:
R.M.F. Products, Batavia, IL; Nobex Components, Griffith Plastic
Corp., Burlingame, CA; Photo Chemical Products of California,
Santa Monica, CA; I.E.E.–Atlas, Van Nuys, CA.
SCDV Interface with Siemens/Intel 8031 Microprocessor (using serial port in mode 0)
SCDV Interface with Siemens/Intel 8031 Microprocessor (using one bit of parallel port as serial input)
IDCD5230
XTAL2
RxD
18
10
19
XTAL1
RST
9
17
P3.7
13
P3.3
P3.4
14
8031
U1
TxD
11
SDCLK
RST
LD
GND
CS
CLK I/O
CC
V
GND
CC
V
40
ID
+
0.01 F
TAN
22 F
CC
V
VCC
1
2
6
7
14
12
9
8
13
DATA
VCC
10
VCC
11
IDCD5231
XTAL2
P3.0
18
10
19
XTAL1
RST
1
8031
U1
SDCLK
RST
LD
GND
CS
CLK I/O
CC
V
DATA
CC
V
40
ID
+
0.01 F
TAN
22 F
CC
V
VCC
P1.0
9
20
P3.1
11
P3.6
16
P0.0
39
7
6
2
1
13
12
9
8
GND
14
CC
V
11
CC
V
10
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SCDV5543 | 功能描述:LED 显示器和配件 5x5 Green 0.126" 4-CHARACTER RoHS:否 制造商:Avago Technologies 显示器类型:7 Segment 数位数量:2 字符大小:7.8 mm x 14.22 mm 照明颜色:Red 波长:628 nm 共用管脚:Common Anode 工作电压:2.05 V 工作电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 35 C 封装:Tube |
| SCDV5544 | 功能描述:LED 显示器和配件 5x5 Hi-Eff Green 0.126" 4-CHARACTER RoHS:否 制造商:Avago Technologies 显示器类型:7 Segment 数位数量:2 字符大小:7.8 mm x 14.22 mm 照明颜色:Red 波长:628 nm 共用管脚:Common Anode 工作电压:2.05 V 工作电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 35 C 封装:Tube |
| SCDX | 功能描述:XLR 连接器 HINGED COVER D-SIZE RoHS:否 制造商:Neutrik 标准:Standard XLR 产品类型:Connectors 型式:Female 位置/触点数量:3 端接类型:Solder 安装风格:Cable 方向:Vertical |
| SCDX-5-GREEN | 功能描述:XLR 连接器 D SZ HNGD SEAL COVER PLASTIC - GREEN RoHS:否 制造商:Neutrik 标准:Standard XLR 产品类型:Connectors 型式:Female 位置/触点数量:3 端接类型:Solder 安装风格:Cable 方向:Vertical |
| SCDX-6 | 制造商:Neutrik USA Inc 功能描述: |
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