Alpha-Numeric Vacuum Fluorescent Displays
Description
Alpha-Numeric Vacuum Fluorescent Displays (VFDs) are devices designed to display letters and numbers. They utilize a sixteen-segment or 5x7 dot matrix configuration to present alphanumeric characters. These displays are known for their high brightness and wide viewing angles, making them suitable for environments where visibility is crucial.
Working Principle
Alpha-Numeric VFDs operate as voltage-controlled devices. They consist of a cathode, grid, and anode sealed within a high-vacuum glass envelope. The cathode is heated to emit electrons, which are then directed towards the anode through the grid when both the grid and anode are positively charged relative to the cathode. The anode is coated with a fluorescent material that emits light upon electron impact, illuminating specific segments to form characters. The brightness of the display is determined by the voltage difference between the cathode and anode. These displays are useful due to their ability to produce bright, clear characters that are easily readable from various angles.
Applications
Alpha-Numeric VFDs are commonly used in devices where clear and bright display of information is necessary. Specific examples include digital clocks, car dashboard displays, and point-of-sale terminals. Their ability to display both letters and numbers makes them versatile for various informational displays in consumer electronics and industrial equipment.
Advantages over other Vacuum Fluorescent Displays
Alpha-Numeric VFDs offer the advantage of displaying both letters and numbers, unlike simpler numeric-only displays. This capability allows for more detailed information to be presented, which is particularly beneficial in applications requiring textual data alongside numerical values.
Limitations
One limitation of Alpha-Numeric VFDs is their reliance on high-voltage drivers, which can complicate the design and increase the cost of the overall system. Additionally, while they offer high brightness, they may not be suitable for environments with high ambient light without additional backlighting options.
Considerations
When considering Alpha-Numeric VFDs, it is important to account for initial costs, which can be higher due to the need for high-voltage drivers and potentially complex circuitry. Operating expenses are generally low, but the durability of the display can be affected by prolonged exposure to high temperatures or excessive voltage. Maintenance costs are typically minimal, but replacement may be necessary if the fluorescent coating on the anode deteriorates over time, affecting brightness and clarity.
from DigiKey
Vacuum Fluorescent Display (VFD) 20 x 2 Character 5V 116.00mm x 37.00mm x 15.70mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 20
- Number of Rows: 2
- Character Width: 2
from RS Components, Ltd.
Intelligent alphanumeric dot-matrix vacuum fluorescent displays using an emissive technology. Wide viewing angle. Bright blue-green fluorescent image. 4, 5 or 6 luminance levels. Integral display controller, drivers and dc/dc converter. Over 220 characters and symbols. Serial or parallel interface. [See More]
- Display Type: Alpha-Numeric
- Number of Rows: 2
- Display Color: Green
- Number of Characters: 16
from DigiKey
Vacuum Fluorescent Display (VFD) 16 x 2 Character 5V 122.00mm x 44.00mm x 20.00mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 16
- Number of Rows: 2
- Character Width: 4
from RS Components, Ltd.
Intelligent alphanumeric dot-matrix vacuum fluorescent displays using an emissive technology. Wide viewing angle. Bright blue-green fluorescent image. 4, 5 or 6 luminance levels. Integral display controller, drivers and dc/dc converter. Over 220 characters and symbols. Serial or parallel interface. [See More]
- Display Type: Alpha-Numeric
- Number of Rows: 2
- Display Color: Green
- Number of Characters: 20
from DigiKey
Vacuum Fluorescent Display (VFD) 20 x 4 Character 5V 146.00mm x 62.50mm x 23.00mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 20
- Number of Rows: 4
- Character Width: 4
from RS Components, Ltd.
Intelligent alphanumeric dot-matrix vacuum fluorescent displays using an emissive technology. Wide viewing angle. Bright blue-green fluorescent image. 4, 5 or 6 luminance levels. Integral display controller, drivers and dc/dc converter. Over 220 characters and symbols. Serial or parallel interface. [See More]
- Display Type: Alpha-Numeric
- Number of Rows: 2
- Display Color: Green
- Number of Characters: 16
from DigiKey
Vacuum Fluorescent Display (VFD) 16 x 2 Character 5V 80.00mm x 36.00mm x 13.00mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 16
- Number of Rows: 2
- Character Width: 2
from RS Components, Ltd.
High-brightness low-profile dot matrix graphic display modules. The modules include the VFD glass, VF drivers and microcontroller. 8-bit Parallel/Serial Interface (Selectable by jumper). Low Profile Construction. Single 5Vdc Supply. All of the displays use a green phosphor with 505nm peak wavelength... [See More]
- Display Type: Alpha-Numeric
- Viewing Area Width: 52.5
- Display Color: Green
- Viewing Area Height: 11.45
from DigiKey
Vacuum Fluorescent Display (VFD) 20 x 4 Character 5V 98.00mm x 60.00mm x 17.00mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 20
- Number of Rows: 4
- Character Width: 2
from RS Components, Ltd.
Intelligent alphanumeric dot-matrix vacuum fluorescent displays using an emissive technology. Wide viewing angle. Bright blue-green fluorescent image. 4, 5 or 6 luminance levels. Integral display controller, drivers and dc/dc converter. Over 220 characters and symbols. Serial or parallel interface. [See More]
- Display Type: Alpha-Numeric
- Number of Rows: 2
- Display Color: Green
- Number of Characters: 20
from DigiKey
Vacuum Fluorescent Display (VFD) 40 x 2 Character 5V 182.00mm x 33.50mm x 13.30mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 40
- Number of Rows: 2
- Character Width: 2
from RS Components, Ltd.
Intelligent alphanumeric dot-matrix vacuum fluorescent displays using an emissive technology. Wide viewing angle. Bright blue-green fluorescent image. 4, 5 or 6 luminance levels. Integral display controller, drivers and dc/dc converter. Over 220 characters and symbols. Serial or parallel interface. [See More]
- Display Type: Alpha-Numeric
- Number of Rows: 2
- Display Color: Green
- Number of Characters: 16
from DigiKey
Vacuum Fluorescent Display (VFD) 20 x 2 Character 5V 146.00mm x 43.00mm x 19.00mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 20
- Number of Rows: 2
- Character Width: 4
from RS Components, Ltd.
Intelligent alphanumeric dot-matrix vacuum fluorescent displays using an emissive technology. Wide viewing angle. Bright blue-green fluorescent image. 4, 5 or 6 luminance levels. Integral display controller, drivers and dc/dc converter. Over 220 characters and symbols. Serial or parallel interface. [See More]
- Display Type: Alpha-Numeric
- Number of Rows: 1
- Display Color: Green
- Number of Characters: 12
from DigiKey
Vacuum Fluorescent Display (VFD) 24 x 2 Character 5V 125.00mm x 36.00mm x 20.74mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 24
- Number of Rows: 2
- Character Width: 2
from RS Components, Ltd.
High-brightness low-profile dot matrix graphic display modules. The modules include the VFD glass, VF drivers and microcontroller. 8-bit Parallel/Serial Interface (Selectable by jumper). Low Profile Construction. Single 5Vdc Supply. All of the displays use a green phosphor with 505nm peak wavelength... [See More]
- Display Type: Alpha-Numeric
- Viewing Area Width: 164
- Display Color: Green
- Viewing Area Height: 40.22
from DigiKey
Vacuum Fluorescent Display (VFD) 40 x 4 Character 5V 190.00mm x 54.00mm x 14.60mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 40
- Number of Rows: 4
- Character Width: 2
from RS Components, Ltd.
High-brightness low-profile dot matrix graphic display modules. The modules include the VFD glass, VF drivers and microcontroller. 8-bit Parallel/Serial Interface (Selectable by jumper). Low Profile Construction. Single 5Vdc Supply. All of the displays use a green phosphor with 505nm peak wavelength... [See More]
- Display Type: Alpha-Numeric
- Viewing Area Width: 57.48
- Display Color: Green
- Viewing Area Height: 28.68
from DigiKey
Vacuum Fluorescent Display (VFD) 40 x 2 Character 5V 182.00mm x 33.50mm x 20.50mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 40
- Number of Rows: 2
- Character Width: 2
from RS Components, Ltd.
High-brightness low-profile dot matrix graphic display modules. The modules include the VFD glass, VF drivers and microcontroller. 8-bit Parallel/Serial Interface (Selectable by jumper). Low Profile Construction. Single 5Vdc Supply. All of the displays use a green phosphor with 505nm peak wavelength... [See More]
- Display Type: Alpha-Numeric
- Viewing Area Width: 115
- Display Color: Green
- Viewing Area Height: 28.7
from DigiKey
Vacuum Fluorescent Display (VFD) 20 x 4 Character 5V 146.00mm x 62.50mm x 23.00mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 20
- Number of Rows: 4
- Character Width: 4
from DigiKey
Vacuum Fluorescent Display (VFD) 20 x 4 Character 5V 98.00mm x 60.00mm x 17.00mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 20
- Number of Rows: 4
- Character Width: 2
from DigiKey
Vacuum Fluorescent Display (VFD) 40 x 4 Character 5V 190.00mm x 54.00mm x 19.70mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 40
- Number of Rows: 4
- Character Width: 2
from DigiKey
Vacuum Fluorescent Display (VFD) 16 x 2 Character 5V Parallel 80.00mm x 36.00mm x 8.50mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 16
- Number of Rows: 2
- Character Width: 2
from DigiKey
Vacuum Fluorescent Display (VFD) 24 x 6 Character 5V Parallel/Serial 98.00mm x 47.00mm x 9.70mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 24
- Number of Rows: 6
- Character Width: 3
from DigiKey
Vacuum Fluorescent Display (VFD) 24 x 6 Character 5V Parallel/Serial 98.00mm x 47.00mm x 9.70mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 24
- Number of Rows: 6
- Character Width: 3
from DigiKey
Vacuum Fluorescent Display (VFD) 24 x 4 Character 5V Parallel/Serial 116.00mm x 37.00mm x 9.30mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 24
- Number of Rows: 4
- Character Width: 3
from DigiKey
Vacuum Fluorescent Display (VFD) 24 x 4 Character 5V Parallel/Serial 116.00mm x 37.00mm x 9.30mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 24
- Number of Rows: 4
- Character Width: 3
from DigiKey
Vacuum Fluorescent Display (VFD) 20 x 2 Character 5V Parallel/Serial 116.00mm x 37.00mm x 9.30mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 20
- Number of Rows: 2
- Character Width: 7
from DigiKey
Vacuum Fluorescent Display (VFD) 20 x 2 Character 5V Parallel/Serial 116.00mm x 37.00mm x 9.30mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 20
- Number of Rows: 2
- Character Width: 7
from DigiKey
Vacuum Fluorescent Display (VFD) 16 x 2 Character 5V Serial 86.60mm x 23.00mm x 8.55mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 16
- Number of Rows: 2
- Character Width: 2
from DigiKey
Vacuum Fluorescent Display (VFD) 16 x 2 Character 5V Parallel/Serial 80.00mm x 36.00mm x 8.50mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 16
- Number of Rows: 2
- Character Width: 2
from DigiKey
Vacuum Fluorescent Display (VFD) 16 x 2 Character 5V Parallel/Serial 122.00mm x 44.00mm x 10.70mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 16
- Number of Rows: 2
- Character Width: 4
from DigiKey
Vacuum Fluorescent Display (VFD) 20 x 2 Character 5V Parallel/Serial 190.00mm x 55.00mm x 9.70mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 20
- Number of Rows: 2
- Character Width: 7
from DigiKey
Vacuum Fluorescent Display (VFD) 20 x 2 Character 5V Parallel/Serial 190.00mm x 55.00mm x 9.70mm [See More]
- Display Type: Alpha-Numeric
- Number of Characters: 20
- Number of Rows: 2
- Character Width: 7
from GSE Scale Systems
For applications that require an elevated level of flexibilityover elementary weighing indicators, the Model 460 and465 Indicators are the perfect solution. • 15 Variable Data Registers • 2 Scale Input Signals • 4K Byte Database Memory • 8 I/O, Variable Activation and... [See More]
- Display Type: Alpha-Numeric
- Number of Rows: 2
- Display Color: Green
- Number of Characters: 6