7 Segment LCD Display BTN Negative White Digits HT1621 Driver PIN
Connect
Detail Information
| LCD Type: | BTN, Negative |
| Viewing Angle: | 12 O'clock |
| Operating Temperature: | 0~+50℃ |
| Voltage: | 5.0V |
| Driver IC: | HT1621 |
| Connector: | PIN |
Detailed Parameters:
| NO. | ITEM | SPECIFICATIONS |
| 1 | LCD Type | TN negative, transmissive |
| 2 | Viewing Angle | 12 O'clock |
| 3 | Drive Method | 1/4 Duty, 1/3 Bias, 5.0V |
| 4 | Operating Temperature | 0~+50℃ |
| 5 | Storage Temperature | -10~+60℃ |
| 6 | Connector | PIN, 36 numbers |
| 7 | Module Size | 78.6(W)* 60.0(H)* 7.1(T) mm |
| 8 | LCD View Area | 54(W)* 43(H) mm |
Advantages
Simple structure, low cost
It is composed of only 7 basic lines, with a simple production
process. Compared to dot matrix LCD or OLED, it has a lower
manufacturing cost and is suitable for large-scale popularization.
For example, low-cost devices such as ordinary electronic
calculators and kitchen timers almost all use 7-segment liquid
crystal displays.
Extremely low power consumption
The liquid crystal itself does not emit light. It relies on
external light sources (such as ambient light) or backlight
(usually LED), and during operation, it only requires a weak
current to drive the liquid crystal molecules to deflect. The power
consumption is much lower than that of LED digital tubes.
With a button battery, it can work for a long time (such as
electronic watches can last for several years), especially suitable
for portable and low-power devices.
Clear display, good visibility
Under normal lighting, the digital display of liquid crystal has
high contrast and clear characters, and there is no "irritating"
problem of LED digital tubes. The visual comfort is better.
After some products are equipped with backlight, they can also
display clearly in dark environments, meeting the needs of
different scenarios.
Compact size, easy integration
The 7-segment structure design is compact. A single digit module
can be made very small (such as with a diameter of a few
millimeters), which is convenient for integration into small
electronic devices and saves space.
For example, the time display of smart wristbands and the reading
window of small multimeters all take advantage of its small size.
Long lifespan, high stability
The lifespan of liquid crystal materials and driving circuits is
long. Under normal use, they are not easily damaged, and their
vibration and shock resistance performance is better than
mechanical display components (such as mechanical counters).
There are no filament or electrode aging problems, high stability,
and very low maintenance costs.
Disadvantages
Display content is limited.
Only 0-9 numbers and a few simple symbols (such as “-” and “.”) can
be displayed. Letters, Chinese characters or complex graphics
cannot be shown. The functional limitations are significant.
For example, it cannot be used in devices that require text display
(such as mobile phones, computer screens).
Dependent on light source, visibility is poor in dark places
(without backlight)
The 7-segment LCD without backlight cannot display at all in a dark
environment and must rely on ambient light; even with backlight,
its brightness and color expression ability are far inferior to
OLED and other self-luminous display technologies.
In contrast, LCDs with OLED or IPS materials have wider viewing
angles and are more applicable.
Performance declines in low temperatures
The activity of liquid crystal molecules is greatly affected by
temperature. In low-temperature environments (such as below -10°C),
response speed slows down, and display delays or stutters may
occur; in extreme low temperatures, the display function may even
be lost.
Dynamic effects cannot be achieved
Due to the fixed structure, only static numbers can be displayed
through the combination of segment on and off. Dynamic effects such
as animations and gradients cannot be achieved, and the
interactivity is poor.
Summary
The 7-inch LCD display, due to its advantages such as low cost, low
power consumption, and simple structure, holds a significant
position in the digital display field (especially in scenarios
involving simple numerical readings). However, its single-function
and limited display capabilities prevent it from meeting complex
display requirements. With the advancement of technology, it has
gradually been replaced by dot matrix LCDs and OLEDs in high-end
devices. Nevertheless, in the basic digital display scenarios with
low cost and low power consumption, it still retains its
irreplaceable value.
