CN101685608A - Display system and driving method thereof - Google Patents
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- CN101685608A CN101685608A CN200810198830A CN200810198830A CN101685608A CN 101685608 A CN101685608 A CN 101685608A CN 200810198830 A CN200810198830 A CN 200810198830A CN 200810198830 A CN200810198830 A CN 200810198830A CN 101685608 A CN101685608 A CN 101685608A
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- 238000012545 processing Methods 0.000 abstract description 6
- 230000004297 night vision Effects 0.000 description 22
- 239000007858 starting material Substances 0.000 description 12
- 239000004973 liquid crystal related substance Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
- 230000000007 visual effect Effects 0.000 description 4
- 230000004913 activation Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000004438 eyesight Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- NHDHVHZZCFYRSB-UHFFFAOYSA-N pyriproxyfen Chemical compound C=1C=CC=NC=1OC(C)COC(C=C1)=CC=C1OC1=CC=CC=C1 NHDHVHZZCFYRSB-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a display system and a driving method thereof which can output low luminance, in particular relates to a step of descending the color gradation of red signals in a display picture; the display system comprises a monitor and an image processing device, and the image processing device at least output the red signals to the monitor to display the image. The color gradation ofred signals is descended in a way of using a control chip or a switch device, so that the monitor is suitable for watching by a user under a special condition.
Description
Technical field
The invention provides a kind of display system and driving method thereof, the particularly a kind of display system and driving method thereof that can downgrade red signals color range output in the display frame.
Background technology
In the ordinary course of things, the user can directly read the display message on the LCD; And under some special situations, for example military, security monitoring, hunting, night ecological observation ... etc., the brightness of LCD must downgrade in order to avoid influence context, but the brightness after downgrading but make general user can't direct reading it.Be must wear the information that night-vision devices are observed LCD with the user, for example figure, literal, image ... etc.No matter yet general night-vision devices are to use the second generation or third generation image intensifier tube (image intensifier), its in the gain in visible light red light district and infrared light district much larger than other wave band, as shown in Figure 1.Even if so with the briliancy Wehnelt electrode low value of LCD, the night-vision devices that general non-specialized designs is used for watching LCD in the use, still go up supersaturation because of night-vision devices mutually with the excessive amplification of light signal and apparent easily, even cause the damage of night-vision devices assembly and the discomfort impression of night-vision devices user vision overstimulation.
Perhaps also can adopt the mode that downgrades the liquid crystal display-driving electric current to reduce the integral brightness of LCD, but the very few design of LCD is at present used with ultralow briliancy, even if the light emitting diode of the low drive current of LCD utilization is as backlight, still the minimum drive current restriction is arranged because of the light emitting diode lowest drive current makes LCD, if and the liquid crystal display-driving electric current is lower than this minimum drive current, then can produce the situation of flicker (flicker), and cause the instability of liquid crystal display displays picture; In sum, because the minimum briliancy of LCD promptly is activated circuit or assembly is limit, so known LCD is difficult to see through the mode that reduces the liquid crystal display-driving electric current and make the minimum briliancy of LCD meet the visual experience permissible range of watching through night-vision devices.
On known techniques, when the minimum briliancy of LCD can't meet the permissible range of night-vision devices and human visual impression, the optical filter that the night-vision devices user will filter ruddiness mostly is positioned on the LCD, uses order meets night-vision devices and human visual impression through the light of described optical filter permissible range.Yet the method has following three kinds of shortcomings: 1. if LCD has touch controllable function, owing to optical filter is positioned on the LCD, and cause the operator to be difficult to LCD is carried out touch control operation.2. the operator need carry this optical filter, and properly preserves.3. with the ask a price market price of 1,000 U.S. dollars of 12.1 o'clock now optical filters, the optical lightscreening sector-meeting causes on the user cost burden greatly.
Summary of the invention
The present invention disclosed a kind of display system that can export low briliancy with and driving method, especially downgrade the color range of red signals; Display system has comprised LCD and an image processor, and image processor exports red, blue, green signal to LCD with show image.
Image processor downgrades the mode of red signals color range, is gamma (Gamma) value of utilizing control chip to control the red signals color range; Wherein can utilize software directly to adjust the output Gamma of display chip, or on the signal transmission channel behind the display chip, carry the color management chip that to do red, blue, green rank output Gamma adjustment respectively.No matter be to adopt above any chip, all adjusting with Gamma of red signals can be downgraded, be beneficial to watch under special circumstances the demonstration of this display system.For example, when the user utilizes night-vision devices, make night-vision devices not have supersaturation, even can be directly the Gamma of red signals be adjusted into 0.
Image processor downgrades the mode of red signals color range, also can between output of the red signals of signal transmission channel and display, install a switchgear additional, when the user utilizes night-vision devices to watch display, just can take respective operations (for example voluntarily, press certain triggering key and produce a trigger signals, again by the mode of trigger signals activation (enable) hardware or software, and this red channel is closed, and output red signal not.
By following detailed explanation, the appended legend of arranging in pairs or groups, the invention described above characteristic, advantage and target will be more clear.
Description of drawings
Fig. 1 is the gain relationship figure to different wave length of night-vision devices.
Fig. 2 is the circuit diagram according to the display system of first embodiment of the invention.
Fig. 3 is the circuit diagram according to the display system of second embodiment of the invention.
Fig. 4 is the circuit diagram according to the display system of third embodiment of the invention.
Fig. 5 shows the corresponding curve relation figure that carries out the Gamma conversion for redness input data.
Fig. 6 shows the flow chart of steps according to the present invention's display-apparatus driving method.
Embodiment
Fig. 2 is the circuit box synoptic diagram according to the computer system of first embodiment of the invention.The computer system 500 of present embodiment exposure comprises a display system 2, one main circuit devices 60 at least, and a special pattern starter gear 62.This display system 2 is to be example with the liquid crystal display systems, but is not to be defined in this.This liquid crystal display systems 2 more comprises a LCD 26, in order to show image; And an image processor 20 in order to export blue B, green G, red R (28) signal, shows for this LCD 26.This image processor 20 comprises a display chip 22, and a signal transmission channel 24.This display chip 20 receives image input (not icon) basically, carry out the processing of image demonstration after, export to signal transmission channel 24.This display chip 22 has gamma (Gamma) processing capacity, can red, blue, green input data (not icon) in this image input be converted into red, blue, green output data (r, b, g) according to the corresponding relation of specific curves.
This main circuit device 60, be responsible for the main running of this computer system 500, the for example computing of operating system, (image) signal of will video picture handling is transferred to image processor (20) and is handled, and exports red R, green G, blue B signal to LCD (26) with video picture.、
With reference to Fig. 5, be example with the redness, show the corresponding curve relation figure that carries out the Gamma conversion for redness input data.For example, this display chip 22 receives between redness of 0～255 digital color range (or briliancy) and imports data (in this so-called color range, the depth program that also is about to redness is subdivided into 0～255 respective value (level)), according to the corresponding relation of Fig. 5 curve a, input levels is similar to one to one with the corresponding relation of output levels.In like manner, blue, green input data (b, g) also can be carried out the conversion of correspondence according to other Gamma curve (not icon).Therefore, this image processor 20, an available software 222 are directly controlled the Gamma conversion in the display chip 22, and the color range of adjustable magenta color output data.For example, the color range of red output data can be downgraded zero, or shown in Fig. 5 curve b, downgrade the color range of red output data with a preset ratio.Wherein, this software 222 for example is the driver of this display chip 22.
Blue, green output data and the red output data that downgrades the back by signal transmission channel 24, and become blue B, green G, red R (28) signal, show for this LCD 26.Because red output data is through downgrading, the color range (or briliancy) of red R (28) signal also downgrades thereupon, so the red composition of these LCD 26 shown images reduces, watches under special circumstances so be fit to the user.For example, the user is when wearing night-vision devices and observe the display message of LCD, just can take respective operations (for example voluntarily, open a special pattern to produce a trigger signals, again by the mode of trigger signals activation (enable) hardware or software, and then downgrade red composition, so can not make night-vision devices produce the briliancy of supersaturation.
The operation that aforementioned user can take voluntarily, can and reach through this special pattern starter gear 62, for example when using night-vision devices to watch the demand of the shown data of LCD (26～46), the user can open this special pattern starter gear 62 in advance and (for example see through and push a predetermined key ... etc. mode), and produce this trigger signals, to make image processor (20～30) carry out the operation of reduction red signals R as described above respectively, to meet the visual experience permissible range of watching through night-vision devices.
The signal transmission channel 24 of present embodiment, for example comprise transistor-transistor-logic (transistor-transistor-logic, TTL) or low voltage differential signal (low voltagedifferential signaling, LVDS) device, carry out the conversion of necessity in order to red, blue, the green output data that display chip is sent, and produce this red, blue, green signal (R, B, G), and export this LCD 26 to.In addition, Gamma transformation curve a, b shown in Figure 5 are straight line, only are the usefulness of illustration, but are not to be defined in this, and the transformation curve shape of reality is looked closely practical application and decided.In addition, this main circuit device 60 and special pattern starter gear 62 also can be arranged in this display system 2.
Fig. 3 is the circuit box synoptic diagram according to the computer system of second embodiment of the invention.The computer system 600 of present embodiment exposure comprises a display system 3, one main circuit devices 60 at least, and a special pattern starter gear 62.This display system 3 is to be example with the liquid crystal display systems, but is not to be defined in this.Liquid crystal display systems 3 comprises a LCD 36; And an image processor 30 in order to export blue B, green G, red R (28) signal, shows for this LCD 36.This image processor 30 comprises a display chip 32, and a signal transmission channel 34.This display chip 30 receives image input (not icon) basically, and after the processing of carrying out the image demonstration, output has, and output data red, blue, green (r, b, g) one-tenth branch is given signal transmission channel 34.
This main circuit device 60, be responsible for the main running of this computer system 600, the for example computing of operating system, (image) signal of will video picture handling is transferred to image processor (30) and is handled, and exports red R, green G, blue B signal to LCD (36) with video picture.
The signal transmission channel 34 of present embodiment, for example comprise transistor-transistor-logic (TTL) or low voltage differential signal (LVDS) device, carry out the conversion of necessity in order to the data (r, b, g) that display chip 32 is sent, and produce this red R (28), blue B, green G signal, and export this LCD 36 to.Be noted that more carrying one in the signal transmission channel 34 can carry out the color management chip 343 that Gamma adjusts to data (r, b, g), produces this red R (28), blue B, green G signal to arrange in pairs or groups above-mentioned TTL, LVDS running.Gamma that this color management chip 343 is carried out adjusts, and is identical as person as described in first embodiment, so no longer given unnecessary details.
This image display 30 utilizes this color management chip 343 further to downgrade the data r that this display chip 32 is sent, and then downgrades the color range of red signals R (28).So the red composition of these LCD 36 shown images reduces, watch under special circumstances so be fit to the user.For example, the user can not make night-vision devices produce the briliancy of supersaturation when wearing night-vision devices and observe the display message of LCD.Similarly, downgrade red signals R (28), for example, its color range can be downgraded zero, or shown in Fig. 5 curve b, downgrade its color range with a preset ratio.In like manner, the action of this special pattern starter gear 62 is identical with first embodiment, so no longer given unnecessary details.In addition, this main circuit device 60 and special pattern starter gear 62 also can be arranged in this display system 3.
Fig. 4 is the circuit box synoptic diagram according to the computer system of third embodiment of the invention.The computer system 700 of present embodiment exposure comprises a display system 4, one main circuit devices 60 at least, and a special pattern starter gear 62.This display system 4 is to be example with the liquid crystal display systems, but is not to be defined in this.Liquid crystal display systems 4 comprises a LCD 46; And an image processor 40 in order to export blue B, green G, red R (28) signal, shows for this LCD 46.This image processor 40 comprises a display chip 42, one signal transmission channels 44, and a switchgear 48.This display chip 42 receives image input (not icon) basically, and after the processing of carrying out the image demonstration, output has, and output data red, blue, green (r, b, g) one-tenth branch is given signal transmission channel 44.
This main circuit device 60, be responsible for the main running of this computer system 600, the for example computing of operating system, (image) signal of will video picture handling is transferred to image processor (30) and is handled, and exports red R, green G, blue B signal to LCD (36) with video picture.
The signal transmission channel 44 of present embodiment, for example comprise transistor-transistor-logic (TTL) or low voltage differential signal (LVDS) device, carry out the conversion of necessity in order to the data (r, b, g) that display chip 42 is sent, and produce this red R (28), blue B, green G signal, and export this LCD 46 to.Be noted that red signals R (28) needs can transfer to this LCD 46 through this switchgear 48.Therefore, when the display system 4 of present embodiment is used under special circumstances (for example, the user is when wearing night-vision devices and observe the display message of LCD), the user blocks this red signals R (28) by closing (off) this switchgear 48, make LCD 46 can't receive red signals R (28), that is the color range that is equal to red signals R (28) downgrades zero, so can not make the briliancy of night-vision devices generation supersaturation.This device for image 40 can be with software (not icon) or controller (not shown) one of are set in it ... Deng, control the mode of operation of this switchgear 48.The user can see through this special pattern starter gear 62 of unlatching and close (off) this switchgear 48.In like manner, the action of this special pattern starter gear 62 is identical with first embodiment, so no longer given unnecessary details.In addition, this main circuit device 60 and special pattern starter gear 62 also can be arranged in this display system 4.
Fig. 6 shows the flow chart of steps according to the present invention's display-apparatus driving method.Below will elaborate with reference to Fig. 5～7 in the lump.At first, receive a signal of video signal (step S1) by device for image (20,30 or 40).As previously mentioned, if this display device (2,3 or 4) will be used under special circumstances, the user should open special pattern starter gear 62 earlier, so the computer system of Fig. 5～7 (500,600 or 700) can see through software or hardware unit etc., detecting learns that whether present display (26,36 or 46) is in use (step S2) in particular cases.Use if display (26,36 or 46) lies in particular cases, then device for image (20,30 or 40) will utilize aforementioned variety of way, and the color range of red signal R is downgraded (step S3); Afterwards, again with blue B, green G and the red signals R after downgrading color range output for the usefulness (step S4) of display (26,36 or 46).If display (26,36 or 46) is not to use in particular cases, device for image (20,30 or 40) then, normal output blue B, green G, and red signals R (downgrading without crossing) supply with use (the step S5) of display (26,36 or 46) demonstrations.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limiting the present invention, anyly has the knack of this skill person, in the spirit and scope that do not break away from the present invention; when doing various changes and retouching, so the present invention's protection domain attached claim person of defining after looking is as the criterion.
Claims (10)
1. a display system is characterized in that, comprising:
One display is in order to show image; And
One image processor, the output red signal is to this display at least;
Wherein this image processor when receiving a trigger signals, downgrades the color range of this red signals.
2. display system as claimed in claim 1 is characterized in that this image processor comprises a control chip, possesses the function of the gamma of adjusting this red signals color range, can downgrade the color range of this red signals.
3. display system as claimed in claim 2 is characterized in that, this control chip downgrades the color range of this red signals to zero, or downgrades the color range of this red signals with a preset ratio.
4. display system as claimed in claim 2 is characterized in that, more comprises one first software, in order to drive this control chip, to downgrade the action of this red signals color range.
5. display system as claimed in claim 1 is characterized in that, this image processor comprises:
One signal transmission channel to this red signals conversion of major general, exports this LCD to;
One switchgear is coupled between the red signals output and this LCD of this signal transmission channel;
Wherein, when this switchgear received this trigger signals, this switchgear cut out to cut off the red signals output from this signal transmission channel to this LCD.
6. display system as claimed in claim 5 is characterized in that, more comprises one second software or a controller, in order to drive the action that this switchgear cuts off this red signals.
7. display system driving method, this display system comprises a display, and an image processor; It is characterized in that this method comprises:
Receive a signal of video signal by this image processor;
Utilize this image processor to handle this signal of video signal, to produce at least one red signals; Wherein when this display device receives a trigger signals, downgrade the color range of this red signals; And
Export this process and downgrade the red signals of color range to this display.
8. display system driving method as claimed in claim 7 is characterized in that, the described color range that downgrades this red signals is to utilize one to possess the control chip of adjusting this red signals color range function, and is extremely zero with the color range that downgrades this red signals.
9. display system driving method as claimed in claim 7 is characterized in that, the described color range that downgrades this red signals is to utilize one to possess the control chip of adjusting this red signals color range function, downgrades the color range of this red signals with a preset ratio.
10. display system driving method as claimed in claim 7 is characterized in that, the described color range that downgrades this red signals is to utilize a switchgear to downgrade, and this switchgear is coupled between the output and this display of this image processor.
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| CN2008101988304A CN101685608B (en) | 2008-09-27 | 2008-09-27 | Display system and driving method thereof |
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| CN2008101988304A CN101685608B (en) | 2008-09-27 | 2008-09-27 | Display system and driving method thereof |
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| CN101685608A true CN101685608A (en) | 2010-03-31 |
| CN101685608B CN101685608B (en) | 2012-04-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2775250B1 (en) * | 1998-02-24 | 2000-05-05 | Wilco International Sarl | AIRCRAFT LIGHTING MEDIA COMPATIBLE WITH A NIGHT VISION SYSTEM |
| DE10216821C1 (en) * | 2002-04-16 | 2003-07-17 | Siemens Ag | Color liquid crystal display for use with night vision goggles with liquid crystal cells provided with red filters switched off during night-time operation |
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Owner name: HANDA PRECISION ELECTRONIC (KUNSHAN) CO., LTD. Free format text: FORMER OWNER: FOSHAN SHUNDE DISTRICT MITAC PRECISION TECHNOLOGY CO., LTD. Effective date: 20130703 |
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Effective date of registration: 20130703 Address after: 215300 No. second, 269 Avenue, comprehensive bonded area, Jiangsu, Kunshan Patentee after: Mitac Precision Technology (Kunshan) Corp. Address before: 528308 Guangdong Province, Foshan city Shunde District Lunjiao Street Chung Hei Lun Xing Zhong Lu Patentee before: Foshan Shunde District Mitac Precision Technology Co., Ltd. |