CN106448617A - Head-up display brightness control method and circuit for compensating cathode ray tube difference - Google Patents
Head-up display brightness control method and circuit for compensating cathode ray tube difference Download PDFInfo
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- CN106448617A CN106448617A CN201611142350.7A CN201611142350A CN106448617A CN 106448617 A CN106448617 A CN 106448617A CN 201611142350 A CN201611142350 A CN 201611142350A CN 106448617 A CN106448617 A CN 106448617A
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- display brightness
- brightness control
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- control
- flat display
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
The invention relates to a head-up display brightness control method and a circuit for compensating cathode ray tube (CRT) difference. The method and the circuit comprise an advanced RISC machines (ARM) microcontroller, a nonvolatile memory and a digital to analog (DA) converter. The head-up display brightness control method and circuit modulate the head-up display brightness to obtain an appropriate brightness control parameter, and then make the matched brightness control parameter store in the nonvolatile memory. When the head-up display is power on, the microcontroller reads the brightness control parameter from the memory to form the brightness control formula adapting different head-up displays. After being calculated the brightness control data is sent to the high-precision DA converter through the single program initiation (SPI) bus. The DA converter drives a high-voltage operational amplifier to work and outputs a gate voltage signal to achieve the consistency and accuracy of the head-up display brightness control.
Description
Technical field
The invention belongs to HUD display actuation techniques field is and in particular to a kind of flat display brightness control of compensation CRT diversity
The method of system and circuit.
Background technology
Head up displays (Head Up Display, HUD) abbreviation HUD, is at present generally with flying on aircraft
Row supplementary instrument.That looks squarely is meant that pilot just does not need to bow it can be seen that his important information of needing.Head-up display
Device occurs on military aircraft earliest, and reducing pilot needs to bow to check the frequency of instrument, it is to avoid the attention to road ahead
Power is interrupted and is lost the grasp to situationawareness (Situation Awareness).Because the convenience of HUD and can carrying
High flight safety, airliner also follow-up installation one after another, progressively apply in automotive field now.
Because HUD display brightness directly affects comfortableness and the accuracy of flight information observation, therefore, it is necessary to display
Brightness is accurately controlled the concordance it is ensured that display brightness.Because CRT image source brightness output characteristics has larger difference
Different, within during identical brightness output, the blanking voltage difference of different CRT is about 10V, therefore, under the conditions of same software and hardware, no
Method realizes the concordance of flat display brightness control.For compensate CRT diversity it is ensured that flat display brightness control technology index consistent
Property, need a kind of flat display brightness control method that can compensate for CRT diversity.
At present HUD manually adjusts mechanical potentiometer on CRT display driver grid control circuit to realize showing
The disparity compensation debugging of brightness, because this compensation way is only capable of one-side lightening display brightness or dimming it is impossible to by daytime
Pattern and Night distinguish, and while reducing Night brightness, day mode brilliant synchrotron reduces, and improves day mode
While brightness, Night brightness improves simultaneously, and this just makes flat display brightness control presence conflict it is impossible to ensure flat display brightness control
The concordance of system and accuracy.
Content of the invention
Technical problem to be solved
In place of the deficiencies in the prior art, the flat display brightness that the present invention proposes a kind of compensation CRT diversity controls
Method and circuit, with realize flat display brightness control concordance and accuracy.
Technical scheme
The method that a kind of flat display brightness of compensation CRT diversity controls is it is characterised in that step is as follows：
Step 1：Brightness flop scope under different control models for the HUD is tested using image brightness meter, adjustment HUD is bright
Degree controls the brilliance control parameter in formula, makes flat display brightness excursion disclosure satisfy that flat display brightness index request, then this group
Brilliance control parameter is the coupling brilliance control parameter of CRT used by this HUD；
Step 2：The brilliance control parameter obtaining after debugging is write the non-easy of matching HUD by parallel bus
In the property lost memorizer；
Step 3：HUD goes up electricity every time, and ARM microcontroller reads correction by parallel bus from nonvolatile memory
Brilliance control parameter afterwards, and this parameter is substituted in brilliance control formula, form the brilliance control formula mating with this HUD,
And calculate luminance control data；
Step 4：Luminance control data after calculating is sent to high accuracy D/A converter, D/A converter by spi bus
The high voltage operational amplifier work of output driving control gate voltage signal, realizes the concordance and accurately of flat display brightness control
Property.
The circuit of a kind of method that flat display brightness realizing described compensation CRT diversity controls is it is characterised in that include ARM
Microcontroller, nonvolatile memory and D/A converter；ARM microcontroller by spi bus connect nonvolatile memory and
D/A converter, the outfan of D/A converter connects the high voltage operational amplifier of control gate voltage signal.
Described nonvolatile memory memory capacity is not less than 4Mbit.
Beneficial effect
Method and circuit that a kind of flat display brightness of compensation CRT diversity proposed by the present invention controls, modulate flat display brightness
Obtain suitable brilliance control parameter, matching brilliance control parameter is stored in the nonvolatile memory, in HUD
When electric, microcontroller reads brilliance control parameter from memorizer, forms the brilliance control formula adapting to different HUDs, calculates bright
It is sent to high accuracy D/A converter by spi bus, D/A converter drives high voltage operational amplifier to work simultaneously after degree control data
Output gate voltage signal, thus realize concordance and the accuracy of flat display brightness control.
Brief description
The flat display brightness that Fig. 1 compensates CRT diversity for the present invention controls embodiment circuit theory diagrams；
The method flow diagram that the flat display brightness that Fig. 2 compensates CRT diversity for the present invention controls.
Specific embodiment
In conjunction with embodiment, accompanying drawing, the invention will be further described：
Realize flat display brightness control concordance and accuracy it is critical only that day mode and the independence control of Night
System, by brilliance control parameter extraction out, the brilliance control parameter separate storage of different HUDs in the nonvolatile memory, is put down
Call from memorizer after aobvious upper electricity, form different brilliance control formula, to adapt to the difference of different CRT, realize flat
The concordance of aobvious brilliance control and accuracy.
It is illustrated in figure 1 the schematic diagram that the present invention compensates the flat display brightness control embodiment of CRT diversity, as seen from the figure,
This circuit includes the microcontroller with spi bus serial ports, and its spi bus is connected with high accuracy D/A converter, microcontroller
Data wire is connected with nonvolatile memory with address wire.
Using ARM microcontroller, nonvolatile memory, high accuracy D/A converter, high voltage operational amplifier is as main group
Become；Described ARM memorizer possesses built-in A/D converter sampling, possesses parallel bus；Described nonvolatile memory memory capacity
Not less than 4Mbit, D/A converter precision is not less than 10, and high voltage operational amplifier output area is not less than -60V to 0V.
The microcontroller of the present embodiment adopts the microcontroller of ARM core, and D/A converter precision is 16, non-volatile deposits
Reservoir is FRAM, and memory space is 4Mbit.
As shown in Fig. 2 the method that the present invention realizes the exchange of CRT display driver comprises the steps：
(1) image brightness meter is adopted to test the brightness flop scope under HUD difference control model, flat by continuous adjustment
Brilliance control parameter in aobvious brilliance control formula, makes flat display brightness excursion disclosure satisfy that flat display brightness index request, obtains
Obtain one group of brilliance control parameter, this group parameter mates this HUD；
Typical brilliance control formula is as follows：
Daytime manual mode：LD_DAY_MANUAL=a1X+c1；
Night manual mode：LD_NIGHT_MANUAL=a2X+c2；
Automatic mode：LD_AUTO=a3X+bX1+c3；
Wherein a1, c1 are manual mode brilliance control on daytime parameter；
A2, c2 are night manual mode brilliance control parameter；
A3, b, c3 are automatic mode brilliance control parameter；
X is manual knob input quantity；
X1 is ambient light sensor input quantity；
LD_DAY_MANUAL is manual mode luminance control data on daytime；
LD_NIGHT_MANUAL is night manual mode luminance control data；
LD_AUTO is automatic mode luminance control data.
(2) by brilliance control parameter a1, c1, a2, c2, a3, b, c3 write in the nonvolatile memory of HUD；
(3) after electricity in HUD, microcontroller is initialized, the brilliance control ginseng first in reading non-volatile storage
Numerical value；
(4) flat display brightness setting up different mode controls formula；
(5) calculate luminance control data, write high accuracy D/A converter by spi bus, and then drive high pressure amplifier defeated
Go out gate voltage signal and control flat display brightness.
Claims (3)
1. the method that a kind of flat display brightness of compensation CRT diversity controls is it is characterised in that step is as follows：
Step 1：Brightness flop scope under different control models for the HUD is tested using image brightness meter, adjusts flat display brightness control
Brilliance control parameter in formula processed, makes flat display brightness excursion disclosure satisfy that flat display brightness index request, then this group brightness
Control parameter is the coupling brilliance control parameter of CRT used by this HUD；
Step 2：The brilliance control parameter obtaining after debugging is write the non-volatile of matching HUD by parallel bus
In memorizer；
Step 3：HUD goes up electricity every time, and ARM microcontroller is read revised from nonvolatile memory by parallel bus
Brilliance control parameter, and this parameter is substituted in brilliance control formula, form the brilliance control formula mating with this HUD, and count
Calculate luminance control data；
Step 4：Luminance control data after calculating is sent to high accuracy D/A converter by spi bus, D/A converter exports
The high voltage operational amplifier work of drive control gate voltage signal, realizes concordance and the accuracy of flat display brightness control.
2. a kind of realize described in claim 1 compensate CRT diversity flat display brightness control method circuit it is characterised in that
Including ARM microcontroller, nonvolatile memory and D/A converter；ARM microcontroller connects non-volatile depositing by spi bus
Reservoir and D/A converter, the outfan of D/A converter connects the high voltage operational amplifier of control gate voltage signal.
3. according to claim 2 circuit it is characterised in that：Described nonvolatile memory memory capacity is not less than 4Mbit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611142350.7A CN106448617A (en) | 2016-12-13 | 2016-12-13 | Head-up display brightness control method and circuit for compensating cathode ray tube difference |
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| CN201611142350.7A CN106448617A (en) | 2016-12-13 | 2016-12-13 | Head-up display brightness control method and circuit for compensating cathode ray tube difference |
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| CN201611142350.7A Pending CN106448617A (en) | 2016-12-13 | 2016-12-13 | Head-up display brightness control method and circuit for compensating cathode ray tube difference |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991777A (en) * | 2017-12-25 | 2018-05-04 | 宁波均胜科技有限公司 | A kind of vehicle-mounted head-up-display system with error correction function |
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| EP0709709A1 (en) * | 1994-09-30 | 1996-05-01 | Hughes Aircraft Company | Off-axis head-up display system employing a toric combiner |
| US8487786B1 (en) * | 2010-09-01 | 2013-07-16 | Rockwell Collins, Inc. | Aircraft display system and method |
| CN103650021A (en) * | 2011-07-06 | 2014-03-19 | 日本精机株式会社 | Heads-up display device |
| CN104318911A (en) * | 2013-11-27 | 2015-01-28 | 中国航空工业集团公司洛阳电光设备研究所 | Head-up display luminance control circuit and method |
| CN104331256A (en) * | 2014-11-24 | 2015-02-04 | 中国航空工业集团公司洛阳电光设备研究所 | Personal parameter storage device and storage method of airborne head-up display |
| CN104732953A (en) * | 2013-12-18 | 2015-06-24 | 昆山工研院新型平板显示技术中心有限公司 | Gamma parameter determination method, device, display displaying method and device |
| CN105513563A (en) * | 2015-12-05 | 2016-04-20 | 中国航空工业集团公司洛阳电光设备研究所 | Digitized head-up display brightness control device |
| CN205787480U (en) * | 2016-06-01 | 2016-12-07 | 湖南中岳显控科技股份有限公司 | A kind of head up displays |
-
2016
- 2016-12-13 CN CN201611142350.7A patent/CN106448617A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0709709A1 (en) * | 1994-09-30 | 1996-05-01 | Hughes Aircraft Company | Off-axis head-up display system employing a toric combiner |
| US8487786B1 (en) * | 2010-09-01 | 2013-07-16 | Rockwell Collins, Inc. | Aircraft display system and method |
| CN103650021A (en) * | 2011-07-06 | 2014-03-19 | 日本精机株式会社 | Heads-up display device |
| CN104318911A (en) * | 2013-11-27 | 2015-01-28 | 中国航空工业集团公司洛阳电光设备研究所 | Head-up display luminance control circuit and method |
| CN104732953A (en) * | 2013-12-18 | 2015-06-24 | 昆山工研院新型平板显示技术中心有限公司 | Gamma parameter determination method, device, display displaying method and device |
| CN104331256A (en) * | 2014-11-24 | 2015-02-04 | 中国航空工业集团公司洛阳电光设备研究所 | Personal parameter storage device and storage method of airborne head-up display |
| CN105513563A (en) * | 2015-12-05 | 2016-04-20 | 中国航空工业集团公司洛阳电光设备研究所 | Digitized head-up display brightness control device |
| CN205787480U (en) * | 2016-06-01 | 2016-12-07 | 湖南中岳显控科技股份有限公司 | A kind of head up displays |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991777A (en) * | 2017-12-25 | 2018-05-04 | 宁波均胜科技有限公司 | A kind of vehicle-mounted head-up-display system with error correction function |
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