Dot-matrix display
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A dot-matrix display is a low-cost electronic digital display device that displays information on machines such as clocks, watches, calculators, and many other devices requiring a simple alphanumeric (and/or graphic) display device of limited resolution.[1]
The display consists of a dot matrix of lights or mechanical indicators arranged in a rectangular configuration (other shapes are also possible, although not common) such that by switching on or off selected dots, text or graphics can be displayed. These displays are normally created using LCD, OLED, or LED technology.[2] [3] Some later VF Displays also use a dot-matrix instead of a Seven-segment display. A dot-matrix display controller converts instructions from a processor into signals that control the individual dots in the matrix so that the required display is produced.
History
[edit ]In 1913 Frank C Reilly filed a patent application for his Electric display control.[4] In 1914 Danish inventor Viggo Jensen put some of the first signs in Europe into operation.[5]
In London Daily Express used one of the first examples of real animated dot-matrix built from light bulbs from 1923 on their publishing building.[6] An improved similar screen was later the 1926 proposed Motograph News Bulletin used on Times Square in New York.
The dot-matrix display is also known by the obsolete term "punktmatrix display"[citation needed ] (German for dot-matrix) due to the dot matrix being created in Germany by Rudolf Hell in 1925.
In September 1977, the US Army wrote up a form to the Westinghouse Research and Development Center requesting a more effective energy source that soldiers could use in their technology in the field.[2] [non sequitur ] Japan and America were using the LCD matrices to develop Casio TVs from 1984 to 2000 creating and experimenting with different display setups.[7] In the 1980s and 1990s, dot-matrix displays were introduced into several technologies including televisions, computers, video game systems, and pinball machines. Dot-matrix displays were added into new pieces of technology as a background part of LCD or OLED displays[8] as the technology improved.
Pixel resolutions
[edit ]
Common sizes of dot-matrix displays:
- ×ばつ16 (Two-line)
- ×ばつ32 (Four-line)
- ×ばつ64 (Eight-line)
Other sizes include:
- ×ばつ31 (Four or three-line)
Character resolutions
[edit ]- A common size for a character is ×ばつ7 pixels, either separated with blank lines with no dots (in most text-only displays), or with lines of blank pixels (making the real size ×ばつ8). This is seen on most graphic calculators, such as Casio calculators or TI-82 and superior. It is also seen on some elevator floor indicators and logic cabinets. (Schindler FI MXB/MXV Indicator & Miconic MX-GC cabinet)
- A smaller size is ×ばつ5 (or ×ばつ6 when separated with blank pixels). This is seen on the TI-80 calculator as a "pure", fixed-size ×ばつ5 font, or on most ×ばつ5 calculators as a proportional (×ばつ5 to ×ばつ5) font. The disadvantage of the ×ばつ5 matrix and smaller is that lower case characters with descenders are not practical. A matrix of ×ばつ9 is often used to give a far superior resolution.
- Dot-matrix displays of sufficient resolution can be programmed to emulate the customary seven-segment numeral patterns.
- A larger size is ×ばつ9 pixels, which is used on many "natural display" calculators, shop checkouts and some Schindler FI MXB elevators.
See also
[edit ]- Display examples
- Flip-disc display
- Fourteen-segment display
- Hitachi HD44780 LCD controller
- LED panel
- Sixteen-segment display
- The military request form source number 2.[9]
- Detailed manual from SHARP Corporation.[10]
References
[edit ]- ^ "Dot Matrix Definition". techterms.com. Retrieved 2021年09月22日.
- ^ a b Brody, Thomas P.; Luo, Fang C.; Davies, David H. (1977年09月01日). "Thin Film Transistor-Addressed Display Device". Archived from the original on June 1, 2022.
- ^ "TFT vs. IPS Display: What's the Difference?". Nauticomp. 2017年09月11日. Retrieved 2021年09月22日.
- ^ url=https://patents.google.com/patent/US1119371A/en
- ^ url=https://www.eevblog.com/forum/chat/when-was-the-first-electronic-bitmap-sign-invented/
- ^ url=https://www.reddit.com/r/AskTechnology/comments/dv8yql/how_did_this_dot_matrix_display_screen_exist_in/
- ^ "Part 6: The history of Pocket Television". www.guenthoer.de. Retrieved 2021年09月22日.
- ^ "Dot matrix LCD displays module or as OLED, for text graphics". www.lcd-module.com. Retrieved 2021年09月22日.
- ^ Article title [bare URL PDF ]
- ^ Dot-Matrix LCD Units (with built-in controllers) (PDF). Sharp. 1999. Archived from the original (PDF) on 9 June 2022.
