CN1604176A - Method and system for adjusting display local window contrast - Google Patents
Method and system for adjusting display local window contrast Download PDFInfo
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- CN1604176A CN1604176A CN 200410073245 CN200410073245A CN1604176A CN 1604176 A CN1604176 A CN 1604176A CN 200410073245 CN200410073245 CN 200410073245 CN 200410073245 A CN200410073245 A CN 200410073245A CN 1604176 A CN1604176 A CN 1604176A
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Abstract
This invention relates to a window area contrast changing method and its system applied in CRT display. The method of this invention comprises the following steps: first to generate window information; second to generate control signal according to window information; third to exert pre-play and to adjust image contrast of the window.
Description
One, technical field
The present invention relates to a kind of method and system thereof that adjusts display local window contrast, especially a kind of being applied in the CRT monitor, the method and the system thereof of change window area contrast.
Two, background technology
Display is common two kinds of application: display image and display text.Requiring of these two kinds of demonstrations is different, and literal shows needs high definition not require high-contrast, and image shows needs high-contrast not require high definition.And present display can't guarantee high-contrast when guaranteeing high definition, can't guarantee high definition when guaranteeing high-contrast, and promptly it can't satisfy literal demonstration and the requirement of image contrast of display degree simultaneously.And, require display should guarantee that character display is clear along with Development of Multimedia Technology, guarantee that again image frame is beautiful, but still do not have good solution at present.
Three, summary of the invention
The display that the invention solves in the background technology can't satisfy the technical matters that literal shows and image contrast of display degree requires simultaneously.
Technical solution of the present invention is: a kind of method of adjusting display local window contrast, and its special character is: this method may further comprise the steps:
1) produces window information according to window;
2) produce control signal according to window information;
3) control signal is applied to previewing and puts the picture contrast of adjusting window.
Above-mentioned control signal is a set of pulses signal, and the pulse width of this pulse signal is that width, the repetition number of window in scan line is the line number that window comprised.
Above-mentioned steps 3) control signal is to be applied to the line control pin that previewing is put, the picture contrast of regulating window in.
Above-mentioned window information is one group of information of describing window shape, position.
Above-mentioned window information comprises the instruction of the picture contrast size that window area is set.
Above-mentioned window is the display local window that desire is adjusted.
The system that a kind of method of utilizing above-mentioned adjustment display local window contrast is adjusted, its special character is: this system comprises that computing machine 1, previewing put 2, controller 3,15 pin video signal cables 4 and totalizer 5, computing machine 1 inserts previewing respectively by 15 pin video signal cables 4 puts 2 and controller 3, and controller 3 inserts previewing by totalizer 5 puts 2.
Above-mentioned controller 3 comprises MTV018, resistance R 1～R5 and triode Q1, the end of resistance R 1, R2 and R3 is connected respectively to 15,14,13 pin of MTV018, other end parallel connection, node after its parallel connection joins with the base stage of resistance R 4 and triode Q1 respectively, the collector of triode Q1 connects power supply, emitter is by resistance R 5 ground connection, and emitter inserts totalizer 5 simultaneously.
Above-mentioned totalizer 5 comprises resistance R 6, R7, the emitter of the triode Q1 of resistance R 6 one termination controllers 3, and other end connecting resistance R7 is to ground, and the node of resistance R 6, R7 connects display line control signal, and access previewing in stack back is put 2 line control pin.
Method provided by the invention changes local contrast according to the window of display image when display display text and image, increase the contrast of image window or reduce the contrast of literal window, can satisfy literal simultaneously and show and the requirement of image contrast of display degree.
Four, description of drawings
Fig. 1 is the structural representation of system of the present invention;
Fig. 2 is the controller in the embodiment of the invention and the circuit theory diagrams of totalizer;
Fig. 3 is the corresponding relation synoptic diagram of RAM and screen display among the MTV018 in the embodiment of the invention;
Fig. 4 is the oscillogram of the waveforms at different levels that relate in the embodiment of the invention.
Five, embodiment
Concrete grammar of the present invention is as follows:
1) the display local window of adjusting according to desire produces window information;
2) produce control signal according to window information;
3) control signal is applied to the line control pin that previewing is put, and regulates the picture contrast of the display local window of desire adjustment.
Wherein control signal is a set of pulses signal, and the pulse width of this pulse signal is that width, the repetition number of window in scan line is the line number that window comprised.Window information is one group of information of describing window shape, position, and window information also can comprise the instruction of the picture contrast size that window area is set.
Referring to Fig. 1, the system that method of the present invention can put 2 by computing machine 1, previewing, controller 3,15 pin video signal cables 4 and totalizer 5 constitute realizes.
Previewing of the present invention is put 2 and is adopted TDA4886, and its 24 pin is CONT (line) control pin, thereby the voltage of this pin can be controlled the amplifier gain adjustment contrast of three passages among the TDA4886 simultaneously.
Window information S is transferred to controller 3 by DDC data line 12,15 lines of 15 pin video signal cables 4, selected window area shape can be arbitrarily, the contrast size also can be provided with, the window information S of controller 3 receiving computers 1, and information such as window size, position are translated into the contrast control signal that is synchronized with sweep signal.
Contrast control signal is connected with totalizer 5, line control signal stack with display, be connected to previewing and put 2 line control (or claiming CONT control) pin, the contrast of control window area, window information S directly sends into controller 3 after inserting display.
Referring to Fig. 2, controller 3 comprises MTV018, resistance R 1～R5 and triode Q1, wherein the end of resistance R 1, R2 and R3 is connected respectively to 15,14,13 pin of MTV018, other end parallel connection, node after its parallel connection joins with the base stage of resistance R 4 and triode Q1 respectively, the collector of triode Q1 connects power supply, and emitter is by resistance R 5 ground connection; Totalizer 5 comprises resistance R 6, R7, the emitter of the triode Q1 of resistance R 6 one termination controllers 3, and other end connecting resistance R7 is to ground, and the node of resistance R 6, R7 connects display line control signal, and access previewing in stack back is put 2 line control pin.
Window information S is one group of instruction that is used for controlling MTV018 that sends according to the I2C agreement, the level signal of 13,14, the 15 pin output of MTV018 is through R1, R2, R3 and R4 is weighted, dividing potential drop, receive the base stage of triode Q1, from the emitter output control signal of triode Q1.
Referring to Fig. 3, one group of RAM is arranged in MTV018, RAM is corresponding one by one with screen display for this group, only need in this group RAM, to insert corresponding data, 13,14,15 pin of MTV018 will corresponding output screen shows signal, as insert the data of white in the RAM of " A " indication, 13,14,15 pin of MTV018 are all exported high level between white window phase; Similarly, if in the RAM of " B " indication, insert the data of purple, 13 of MTV018,15 pin output high level between the purple window phase, 14 pin output low levels; In the RAM of " C " indication, insert red data, 15 pin of MTV018 output high level during red window, 13,14 pin output low levels.Window information S is exactly shape, size, the position according to window, the requirement of video in window contrast is inserted the instruction of data at corresponding RAM.
Control signal has 7 grades in the present embodiment to the control of window contrast size, sees the following form.
| The output of MTV018 between window phase | Control signal amplitude grade | ||
| ????13 | ????14 | ????15 | |
| ????H | ????L | ????L | ????1 |
| ????L | ????H | ????L | ????2 |
| ????L | ????L | ????H | ????3 |
| ????H | ????H | ????L | ????4 |
| ????H | ????L | ????H | ????5 |
| ????L | ????H | ????H | ????6 |
| ????H | ????H | ????H | ????7 |
Referring to Fig. 4, it is in the embodiment of the invention, full frame be white picture, window is for the diagram rectangle, when the window contrast being set being 7 grades, the each point waveform that relates to.
Claims (9)
1, a kind of method of adjusting display local window contrast, it is characterized in that: this method may further comprise the steps:
1) produces window information according to window;
2) produce control signal according to window information;
3) control signal is applied to previewing and puts the picture contrast of adjusting window.
2, the method for adjustment display local window contrast according to claim 1, it is characterized in that: described control signal is a set of pulses signal, and the pulse width of this pulse signal is that width, the repetition number of window in scan line is the line number that window comprised.
3, the method for adjustment display local window contrast according to claim 1 and 2 is characterized in that: control signal is to be applied to the line control pin that previewing is put, the picture contrast of regulating window in the described step 3).
4, the method for adjustment display local window contrast according to claim 3 is characterized in that: described window information is one group of information of describing window shape, position.
5, the method for adjustment display local window contrast according to claim 4, it is characterized in that: described window information comprises the instruction of the picture contrast size that window area is set.
6, the method for adjustment display local window contrast according to claim 5 is characterized in that: described window is the display local window that desire is adjusted.
7, the system that adjusts of a kind of method of utilizing the described adjustment display local of claim 1 window contrast, it is characterized in that: this system comprises that computing machine (1), previewing puts (2), controller (3), 15 pin video signal cables (4) and totalizer (5), described computing machine (1) inserts previewing respectively by 15 pin video signal cables (4) puts (2) and controller (3), and described controller (3) inserts previewing by totalizer (5) puts (2).
8, the system of adjustment display local window contrast according to claim 7, it is characterized in that: described controller (3) comprises MTV018, resistance R 1～R5 and triode Q1, the end of described resistance R 1, R2 and R3 is connected respectively to 15,14,13 pin of MTV018, other end parallel connection, node after its parallel connection joins with the base stage of resistance R 4 and triode Q1 respectively, the collector of described triode Q1 connects power supply, and emitter is by resistance R 5 ground connection, and emitter inserts totalizer (5) simultaneously.
9, the system of adjustment display local window contrast according to claim 8, it is characterized in that: described totalizer (5) comprises resistance R 6, R7, the emitter of the triode Q1 of described resistance R 6 one termination controllers 3, other end connecting resistance R7 is to ground, the node of described resistance R 6, R7 connects display line control signal, and access previewing in stack back is put the line control pin of (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410073245 CN1604176A (en) | 2004-11-09 | 2004-11-09 | Method and system for adjusting display local window contrast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410073245 CN1604176A (en) | 2004-11-09 | 2004-11-09 | Method and system for adjusting display local window contrast |
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| Publication Number | Publication Date |
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| CN1604176A true CN1604176A (en) | 2005-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410073245 Pending CN1604176A (en) | 2004-11-09 | 2004-11-09 | Method and system for adjusting display local window contrast |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100435209C (en) * | 2005-05-12 | 2008-11-19 | 逐点半导体（上海）有限公司 | Display for dynamic contrast of image processing effect and display method |
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2004
- 2004-11-09 CN CN 200410073245 patent/CN1604176A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100435209C (en) * | 2005-05-12 | 2008-11-19 | 逐点半导体（上海）有限公司 | Display for dynamic contrast of image processing effect and display method |
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