CN104299551B - A kind of head up displays and improve the method that its stroke character writes efficiency - Google Patents
A kind of head up displays and improve the method that its stroke character writes efficiency Download PDFInfo
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- CN104299551B CN104299551B CN201310627457.0A CN201310627457A CN104299551B CN 104299551 B CN104299551 B CN 104299551B CN 201310627457 A CN201310627457 A CN 201310627457A CN 104299551 B CN104299551 B CN 104299551B
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Abstract
The present invention relates to a kind of head up displays and improve the method that its stroke character writes efficiency, belonging to symbol generation technique field in display device.The present invention is after putting an operation, judge whether the rate of change of symbol generator module output defection signal generates flat aobvious busy signal more than setting value, and flat aobvious busy signal is fed back to symbol generator output module, symbol generator carries out waiting until that the flat aobvious invalid rear symbol generator of busy signal just starts to write vector according to the flat aobvious busy signal of feedback.Invention increases the intelligent interaction signal between symbol generation module and driver module, coordinate relevant book write control logic, the most unidirectional waiting type sequential write is made to become interactive book WriteMode, make call sign generation module can put and a little put in place by written character, successive character is avoided to deform, the most do not waste writing time so that write efficiency and improve.
Description
Technical field
The present invention relates to a kind of head up displays and improve the method that its stroke character writes efficiency, belonging to display and set
Standby middle symbol generation technique field.
Background technology
Head up displays projects the symbol needing display in the dead ahead visual field of driver exactly, makes various
Information is together with real outdoor scene information superposition, and these display symbols are generated by symbol generation module,
CRT tube is sent to show after driver module processing and amplifying.
The flow process of traditional symbol generation module written character be put point, put a time delay, vector is write.Due to
Symbol generation module is digital circuit, can quickly move to any point in viewing area on a large scale
Another point, and display driver circuit can not control electron beam immediately and arrive appointment position owing to bandwidth limits, and just needs
Want certain time delay of putting to design, and put a time delay and may cause putting a little and write and coordinate the most rigorous thus bring
Write not in place, Character deformation, the problem such as lose time.
Summary of the invention
It is an object of the invention to provide a kind of head up displays and improve the method that its stroke character writes efficiency,
With solve current head up displays put a time delay cause putting a little and write coordinate the most rigorous thus bring write less than
Position, Character deformation, the problem such as lose time.
The present invention solves that above-mentioned technical problem provides a kind of head up displays, including the symbol being sequentially connected with
Generator module, driver module and CRT tube, the defection signal of symbol generator module output is through display
Drive module processing and amplifying rear drive CRT tube, described driver module has additional flat aobvious busy signal and generates
Unit, this flat aobvious busy signal signal generating unit generates flat aobvious busy signal for the rate of change according to defection signal, and will
The flat aobvious busy signal generated feeds back to symbol generator module, makes symbol generation module according to this flat aobvious busy signal control
System starts written symbol.
The pulse width of described flat aobvious busy signal is determined by the amplitude of defection signal in symbol generation module.
In described symbol generation module, vector generator uses FPGA or CPLD to realize connecing of flat aobvious busy signal
Receive and whole logistic process.
The present invention solves that above-mentioned technical problem additionally provides a kind of head up displays stroke character that improves and writes effect
The method of rate, the method comprises the following steps:
1) rate of change of symbol generator module output defection signal is judged, if rate of change is more than setting value,
Generate flat aobvious busy signal, and flat aobvious busy signal is fed back to symbol generator output module；
2) symbol generator carries out waiting until that flat aobvious busy signal accords with after invalid according to the aobvious busy signal of putting down of feedback
Number generator just starts to write vector.
The pulse width of described flat aobvious busy signal is determined by the amplitude of defection signal in symbol generation module.
Described vector generator uses FPGA or CPLD to realize the reception of flat aobvious busy signal and whole symbolic logic
Process.
The generation of described flat aobvious busy signal is to be realized by driver module.
The invention has the beneficial effects as follows: the present invention is after putting an operation, it is judged that the output deflection of symbol generator module
The rate of change of signal aobvious busy signal the most flat more than setting value generation, and flat aobvious busy signal is fed back to symbol generation
Device output module, symbol generator carries out waiting until that flat aobvious busy signal is invalid according to the flat aobvious busy signal of feedback
Rear symbol generator just starts to write vector.Invention increases with symbol generation module and driver module it
Between intelligent interaction signal, coordinate relevant book write control logic, make the most unidirectional waiting type sequential write become
Become interactive ways of writing so that symbol generation module can be put and a little put in place by written character, it is to avoid successive character change
Shape, does not the most waste writing time so that writes efficiency and improves.
Accompanying drawing explanation
Fig. 1 is that symbol generation module cross-links graph of a relation with driver module；
Fig. 2 is flat aobvious busy signal cell operation sequential chart in symbol generation module.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is further described.
A kind of embodiment of the head up displays of the present invention
Head up displays used in the present invention, drives including the symbol generator module being sequentially connected with, display
Module and CRT tube, the defection signal of symbol generator module output is after driver module processing and amplifying
Driving CRT tube is lighted, and X defection signal and the y deflection signal of wherein symbol generator module output control
Character display position on head up displays CRT tube；Z high-lightness signal controls the display of head up displays character,
Signal high level correspondence character shows, signal low level correspondence character blanking, has additional in driver module
Flat aobvious busy signal signal generating unit, this flat aobvious busy signal signal generating unit generates for the rate of change according to defection signal,
And the flat aobvious busy signal generated is fed back to symbol generator module, make symbol generation module flat aobvious busy according to this
Signal starts written symbol.
Its operation principle is as follows: first symbol generation module produces X defection signal, y deflection signal and Z brightness
Bright signal gives driver module, and driver module generates anti-according to the rate of change of X, y deflection signal
The flat aobvious busy signal of feedback signal, when rate of change is more than setting value, setting value here is 0.25V/s, if
More than setting value, produced flat aobvious busy signal is fed back to symbol generation module, symbol by driver module
Generator carries out waiting until the flat aobvious invalid rear symbol generator of busy signal just according to the flat aobvious busy signal of feedback
Start to write vector, simultaneously driver module X defection signal, y deflection signal and Z brightness to receiving
Bright signal send CRT imaging to show after processing.
The a kind of of the present invention improves the embodiment that head up displays stroke character writes the method for efficiency
The present invention improves the method that head up displays stroke character writes efficiency, is according to defection signal
Rate of change generate the flat aobvious busy signal of feedback signal, when rate of change is more than 0.25V/s, by produced
Flat aobvious busy signal feeds back to symbol generation module, flat aobvious busy signal unit sequential chart such as figure in symbol generation module
Shown in 2, the present embodiment is implemented based on the symbol generation module in Fig. 1, and the Zd in Fig. 2 is symbol
The vector generator of number generation module is put and performs a pulse, after an operation put by vector generator every time, if
CRT upper deflecting voltage can not reach analog value in time, and within the time of setting (being 4us here), display is driven
The flat aobvious busy signal (Hudbusy signal) (this signal high level is effective) of dynamic model block output, it is desirable to vector occurs
Device waits.Therefore, after putting a little, time delay command ys(time delay 4us should first be sent by display software every time), then give
Going out vector instruction sl, vector generator is when performing sl instruction, if be detected that Hudbusy is high level,
Just start after then waiting until Hudbusy step-down to write vector.In Fig. 2, RESET is systematic reset signal,
Slen is vector book write enable signal, allows to write during low level, and q11 is that vector writes enabling signal, q1
Real vector writing time it is only during for low level.
Above example is only with illustrating and not to limit technical scheme, and different strength parameter values are different,
Although being described in detail the present invention with reference to above-described embodiment, those of ordinary skill in the art should manage
Solve, still the present invention can be modified or equivalent, without departing from the spirit and scope of the present invention
Amendment or local are replaced, and it all should be contained in the middle of scope of the presently claimed invention.
Claims (7)
1. a head up displays, including the symbol generator module, driver module and the CRT that are sequentially connected with
Pipe, symbol generator module output defection signal through driver module processing and amplifying rear drive CRT tube,
It is characterized in that, described driver module has additional flat aobvious busy signal signal generating unit, this flat aobvious busy signal
Signal generating unit generates flat aobvious busy signal for the rate of change according to defection signal, and by anti-for the flat aobvious busy signal of generation
Feed symbol generator module, make symbol generation module control to start written symbol according to this flat aobvious busy signal.
Head up displays the most according to claim 1, it is characterised in that the arteries and veins of described flat aobvious busy signal
Rush width to be determined by the amplitude of defection signal in symbol generation module.
Head up displays the most according to claim 1, it is characterised in that in described symbol generation module
Vector generator uses FPGA or CPLD to realize the reception of flat aobvious busy signal and whole logistic process.
4. one kind is improved the method that head up displays stroke character writes efficiency, it is characterised in that the method bag
Include following steps:
1) rate of change of symbol generator module output defection signal is judged, if rate of change is more than setting value,
Generate flat aobvious busy signal, and flat aobvious busy signal is fed back to symbol generator output module；
2) symbol generator carries out waiting until that flat aobvious busy signal accords with after invalid according to the aobvious busy signal of putting down of feedback
Number generator just starts to write vector.
The method that raising head up displays stroke character the most according to claim 4 writes efficiency, its feature
Being, the pulse width of described flat aobvious busy signal is determined by the amplitude of defection signal in symbol generation module.
The method that raising head up displays stroke character the most according to claim 5 writes efficiency, its feature
Being, in described symbol generation module, vector generator uses FPGA or CPLD to realize the reception of flat aobvious busy signal
With whole logistic process.
The method that raising head up displays stroke character the most according to claim 4 writes efficiency, its feature
Being, the generation of described flat aobvious busy signal is to be realized by driver module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310627457.0A CN104299551B (en) | 2013-11-28 | 2013-11-28 | A kind of head up displays and improve the method that its stroke character writes efficiency |
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| CN201310627457.0A CN104299551B (en) | 2013-11-28 | 2013-11-28 | A kind of head up displays and improve the method that its stroke character writes efficiency |
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| CN104299551A CN104299551A (en) | 2015-01-21 |
| CN104299551B true CN104299551B (en) | 2016-09-14 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6201553B1 (en) * | 1996-10-24 | 2001-03-13 | Canon Kabushiki Kaisha | Character generating method and apparatus |
| CN102509315A (en) * | 2011-09-23 | 2012-06-20 | 中国航空工业集团公司洛阳电光设备研究所 | Stroke type symbol generator and writing method thereof |
| CN102968949A (en) * | 2012-10-23 | 2013-03-13 | 中国航空工业集团公司洛阳电光设备研究所 | Stroke type symbol generator and method for improving display effect of stroke type symbol generator |
-
2013
- 2013-11-28 CN CN201310627457.0A patent/CN104299551B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6201553B1 (en) * | 1996-10-24 | 2001-03-13 | Canon Kabushiki Kaisha | Character generating method and apparatus |
| CN102509315A (en) * | 2011-09-23 | 2012-06-20 | 中国航空工业集团公司洛阳电光设备研究所 | Stroke type symbol generator and writing method thereof |
| CN102968949A (en) * | 2012-10-23 | 2013-03-13 | 中国航空工业集团公司洛阳电光设备研究所 | Stroke type symbol generator and method for improving display effect of stroke type symbol generator |
Non-Patent Citations (2)
| Title |
|---|
| 基于DSP和FPGA的新型笔划式字符发生器;李洁，等;《电光与控制》;20120630;第19卷(第6期);第58-61页 * |
| 基于DSP和FPGA的笔划字符发生器设计;刘翔，等;《航空电子技术》;20080930;第39卷(第3期);第50-54页 * |
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