CN1262114C - Controlling apparatus for TV secondary pictures and controlling method thereof - Google Patents
Controlling apparatus for TV secondary pictures and controlling method thereof Download PDFInfo
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- CN1262114C CN1262114C CN 03111663 CN03111663A CN1262114C CN 1262114 C CN1262114 C CN 1262114C CN 03111663 CN03111663 CN 03111663 CN 03111663 A CN03111663 A CN 03111663A CN 1262114 C CN1262114 C CN 1262114C
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000010894 electron beam technology Methods 0.000 claims abstract description 38
- 230000009466 transformation Effects 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012217 deletion Methods 0.000 description 1
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Abstract
The present invention relates to a control device of television sub-pictures and a control method thereof. The control device comprises a wide-screen television provided with a tuner and a display part. The wide-screen television is also provided with a display part, a power supply part, a voltage transformation part and a control part, wherein the display part displays image signals received through the tuner, the power supply part supplies power, an electron beam current detecting part detects electron beam current of image pictures and sub-pictures, which are provided by the power supply part for the display part, the voltage transformation part transforms the electron beam current of the image pictures and the sub-pictures, which are detected by the electron beam current detecting part, into voltage, and the control part sends out control instructions during the realization of a 4:3 display mode, detects the electron beam current of the image pictures and the sub-pictures through the electron beam current detecting part, and controls the brightness of the sub-pictures according to the difference between the voltage of the image pictures and the voltage of the sub-pictures, which are obtained through the transformation of the voltage transformation part. In the present invention, vertical lines formed in the border position between the image pictures and the sub-pictures can be removed during the realization of the 4:3 display mode of the wide-screen television, and consequently, the quality of the television pictures is improved.
Description
Technical field
The present invention relates to a kind of TV set image treatment technology, the control device and the control method (Apparatus and Method for controlling sidepicture of the TV) thereof of the secondary picture of a kind of wide-screen television of more specifically saying so.
Background technology
Usually, the television set panel is in order to provide the image of varied the ratio of width to height to spectators, picture signal from the outside input, according to the display mode that the user sets, be transformed into corresponding the ratio of width to height after, go again to show.
At this moment, the display mode of television set has the mode standard (Standard Mode) of the ratio of width to height of 4: 3, the widescreen display mode of 16: 9 the ratio of width to height (Wide Mode), the subtitling mode of 16: 9 the ratio of width to height (Captionmode) is made the part of image the zoom mode (Zoom Mode) of close-up shot etc. in addition.
Recently, the demand of the wide-screen television (WideTelevision) of handling the above input signal of 480P (Progressive) has been increased.Expecting picture the ratio of width to height of TV programme (outside input broadcast singal) from now on thus, may be main flow with the display mode with 16: 9 the ratio of width to height.
Traditional display mode, if want to realize the mode standard of 4: 3 the ratio of width to height by the wide-screen television of 16: 9 the ratio of width to height active areas, then be that the picture signal by the outside input is presented at the centre, and add certain secondary picture (Side Picture) in the picture both sides.
At this moment, wide-screen television will go to control the brightness of secondary picture, and it is shown by certain standard, and irrelevant with the brightness of image frame.
As mentioned above, traditional wide-screen television is when display mode worked long hours with 4: 3, owing to keep the secondary picture of image frame both sides by certain brightness, to form a vertical line at the position, boundary of image frame and secondary picture, thereby have the problem that reduces image quality.
Summary of the invention
The control device and the control method thereof that the purpose of this invention is to provide the secondary picture of a kind of TV, be used for improving the problem of the reduction image quality that exists in the prior art, make it can remove wide-screen television when realizing 4: 3 display modes, the vertical line that position, boundary between image frame and secondary picture forms significantly improves television picture quality.
The object of the present invention is achieved like this: this control device comprises the wide-screen television that tuner and display part are set, and its technical essential is: also be provided with and be used for providing to the display part that shows the picture signal that receives by tuner the power suppling part of power supply; Be used for detecting the electron beam current test section of the electron beam current of the image frame that provides to display part from power suppling part and secondary picture; Electron beam current by detected image frame of electron beam current test section and secondary picture is transformed into the voltage transformating part of voltage form; When realizing 4: 3 display modes, send control command and remove each electron beam current of detected image picture and secondary picture by the electron beam current test section, and control the control part of the brightness of secondary picture according to the voltage difference of image frame that is transformed at voltage transformating part and secondary picture, if this control part is according to the voltage difference of image frame and secondary picture during greater than prior set point, secondary picture brightness is increased by given standard, if during, remove display image picture and secondary picture after secondary picture brightness reduced by given standard less than prior set point.
Above-mentioned control device also is provided with the picture signal that is used in the broadcast singal that receives by tuner and carries out decoders for decoding;
Be used for the image signal transformation that has carried out decoding is processed into digital signal, and increase or reduce the image processing part of secondary picture brightness according to the control signal of control part;
Be used for a treated picture signal in image processing part, each signal with R, G, B removes the image efferent exported.
The control method of the secondary picture of this TV comprises following control program:
When receiving the transformation directive of 4: 3 display modes from the outside, just go program that image frame and secondary picture voltage are detected;
When the voltage difference of image frame that detects and secondary picture during greater than prior set point, the program of removing display image picture and secondary picture after secondary picture brightness increased by given standard;
When the voltage difference of image frame that detects and secondary picture during less than prior set point, the program of removing display image picture and secondary picture after secondary picture brightness reduced by given standard.
A demonstration field that does not just have secondary picture when not having the transformation directive of 4: 3 display modes also is set, the program that picture signal is shown with full screen by 16: 9 the ratio of width to height in the control program of above-mentioned control method.
The voltage program of detected image picture and secondary picture also is set in the control program of above-mentioned control method;
The program of electron beam current separately of detected image picture and secondary picture is set;
Be provided with the image frame separately that detects and the electron beam current of secondary picture are transformed into the program of voltage form separately.
Because secondary picture control device of TV and control method thereof are as mentioned above adopted in its invention, so in the time of can on wide-screen television, realizing 4: 3 display modes, voltage difference according to image frame that detects and secondary picture, go to control the brightness of secondary picture, to remove because the vertical line at the luminance difference of image frame and secondary picture position, boundary that form, between image frame and the secondary picture.Therefore, has the effect that can significantly improve image quality.
Description of drawings
Below in conjunction with accompanying drawing the present invention is further described.
Fig. 1 is the secondary picture control device of an a kind of TV of the present invention block diagram.
Fig. 2 is the secondary menu control method flow chart of a kind of TV of the present invention.
Fig. 3 is the view that shows 4: 3 display modes in the wide-screen television.
Sequence number explanation in the accompanying drawing: 10, tuner, 20, decoder, 30, image processing part, 31, the image efferent, 40, display part, 50, power suppling part, 51, the electron beam current test section, 52, voltage transformating part, 60, control part.
Embodiment
Describe the concrete structure of the present invention and the course of work in detail according to Fig. 1-3 and execution mode.
Fig. 1 shows the block diagram of the secondary picture control device of a kind of TV of the present invention.Below with reference to this figure the secondary picture control device of TV of the present invention is described.
As shown in the figure, the secondary picture control device of TV of the present invention is made of following part.That is, power suppling part (50) is set, it is to be used for providing power supply to display part (40) on the wide-screen television that tuner (10) and display part (40) are set, to show the picture signal that receives by tuner; Electron beam (Beam) current detecting part (51) is set, and it is to be used for detecting the image frame that provides to display part (40) from power suppling part (50) and the electron beam current of secondary picture; Voltage transformating part (52) also is set, and it is transformed into the voltage form to the image frame that is detected by electron beam current test section (51) and the electron beam current of secondary picture; Control part (60) also is set, it is when realizing 4: 3 display modes, send control command, by electron beam current test section (51), remove to detect each electron beam current of image frame and secondary picture, and control the brightness of secondary picture according to the voltage difference of image frame that is transformed at voltage transformating part (52) and secondary picture.
In addition, it comprises that also following part constitutes.That is, decoder (20) is set, it is to be used for deciphering by the picture signal in the broadcast singal of tuner (10) reception; Image processing part (30) is set, and it is to be used for a picture signal of deciphering, and conversion process becomes digital signal, and the control signal according to control part (60) increases/reduce the brightness of secondary picture; Image efferent (31) also is set, and it is to be used for treated picture signal in image processing part (30), and each signal with R/G/B goes to export.
At this moment, above-mentioned television set is the wide-screen television of 16: 9 active areas, and display part (40) can adopt CRT (Cathode ray Tube) or CPT (Color Picture Tube) etc.
Have a look the control procedure of the control device of the secondary picture of the invention described above TV below.At first, decoder (20) is deciphered the picture signal in the broadcast singal that receives by tuner (10).
Picture signal by after decoder (20) decoding is transformed into digital signal by image processing part (30), and the picture signal that is transformed into is passed through image processing part (31), remaps into analog signal, then it is separated output with the R/G/B picture signal.
Display part (40) from image efferent (31) reception R/G/B picture signal removes to show relevant image frame.
At this moment, for display frame, power suppling part (50) provides electron beam current to display part (40).
In the present invention, when the TV display mode is 4: 3 patterns,,, detect the image frame that provides by power suppling part (50) and the electron beam current of secondary picture separately by electron beam current test section (51) according to the control signal of control part (60).
With the image frame of detection and the electron beam current of secondary picture, be transformed into the voltage form by voltage transformating part (52), so that control part (60) can go identification.
That is to say that voltage transformating part (52) receives the electron beam current by detected separately image frame of electron beam current test section (51) and secondary picture, then with it again by the impedance of given resistance, be transformed into the voltage form and export.
In addition, control part (60) will remove to control image processing part (30), make it behind the voltage separately of the image frame of receiving conversion and secondary picture, according to the image frame of input and the voltage difference of secondary picture, allow the both sides of image frame, the i.e. brightness of secondary picture can increase/reduce back output by given standard share.
The present invention to working in a manner described below, promptly the control method of the control device of the secondary picture of TV describes.
As shown in Figure 2, at first connect the power supply (S10) of (On) television set.And, judge whether current display mode is 4: 3 display modes (S11).
If the result (S11) who judges, current display mode is not 4: 3 patterns, does not show secondary picture so on the television set active area, and the picture signal that receives from the outside is shown (S12) by 16: 9 the ratio of width to height with full screen (Full Screen).
If judged result (S11), current display mode are 4: 3 patterns, detect the magnitude of voltage (S13) of image frame and secondary picture so separately.
At this moment, the voltage separately of detected image picture and secondary picture is the electron beam current that detects each signal of display image picture and secondary picture by electron beam current test section (51).And,, be transformed into voltage form separately the image frame separately that detects and the electron beam current of secondary picture.
Then, go to judge the voltage difference of the image frame and the secondary picture of detection, if the voltage difference of this image frame and secondary picture is during greater than prior set point (S20), just secondary picture brightness is improved 1 standard (S21), and then the secondary picture that will improve brightness follows image frame together to show (S22).
Here, in the wide-screen television that 16: 9 active areas are set, the state when showing 4: 3 display modes is shown in Fig. 3.
In addition, if the voltage difference of image frame that detects and secondary picture less than set point (S30) in advance, so just the brightness with secondary picture reduces by 1 standard (S31), and then the secondary picture that will reduce brightness follows image frame together to show (S32).
That is to say, detect the luminance difference between image frame and the secondary picture, go to adjust the brightness of secondary picture again according to the luminance difference that detects, show then.
By way of example, the luminance difference of image frame and secondary picture is maintained 10 IRE (0.7 V-
PP=100IRE), keep the luminance difference of image frame and secondary picture.
And the present invention is when deletion realizes 4: 3 display modes in wide-screen television, detects the luminance difference of image frame and secondary picture earlier, again by the luminance difference that detects, goes to control the brightness of secondary picture.
By above-mentioned explanation, those skilled in the art know under the situation that does not break away from technical solution of the present invention, diversified embodiment to be arranged.Technical scope of the present invention will not be subjected to the qualification of the disclosed content of the foregoing description.
Claims (5)
1, the control device of the secondary picture of a kind of TV comprises the wide-screen television that tuner and display part are set, and it is characterized in that: also be provided with and be used for providing to the display part that shows the picture signal that receives by tuner the power suppling part of power supply; Be used for detecting the electron beam current test section of the electron beam current of the image frame that provides to display part from power suppling part and secondary picture; Electron beam current by detected image frame of electron beam current test section and secondary picture is transformed into the voltage transformating part of voltage form; When realizing 4: 3 display modes, send control command and remove each electron beam current of detected image picture and secondary picture by the electron beam current test section, and control the control part of the brightness of secondary picture according to the voltage difference of image frame that is transformed at voltage transformating part and secondary picture, if this control part is according to the voltage difference of image frame and secondary picture during greater than prior set point, secondary picture brightness is increased by given standard, if during, remove display image picture and secondary picture after secondary picture brightness reduced by given standard less than prior set point.
2, control device according to claim 1 is characterized in that: the picture signal that is used in the broadcast singal that receives by tuner is set carries out decoders for decoding;
Be used for the image signal transformation that has carried out decoding is processed into digital signal, and increase or reduce the image processing part of secondary picture brightness according to the control signal of control part;
Be used for a treated picture signal in image processing part, each signal with R, G, B removes the image efferent exported.
3, the control method of the secondary picture of a kind of TV is characterized in that: comprise following control program:
When receiving the transformation directive of 4: 3 display modes from the outside, just go the program that image frame and secondary picture voltage are detected;
When the voltage difference of image frame that detects and secondary picture during greater than prior set point, the program of removing display image picture and secondary picture after secondary picture brightness increased by given standard;
When the voltage difference of image frame that detects and secondary picture during less than prior set point, the program of removing display image picture and secondary picture after secondary picture brightness reduced by given standard.
4, control method according to claim 3 is characterized in that: a demonstration field that does not just have secondary picture when not having the transformation directive of 4: 3 display modes also is set, the program that picture signal is shown with full screen by 16: 9 the ratio of width to height.
5, control method according to claim 3 is characterized in that:
The voltage program of detected image picture and secondary picture is set;
The program of electron beam current separately of detected image picture and secondary picture is set;
Be provided with the image frame separately that detects and the electron beam current of secondary picture are transformed into the program of voltage form separately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03111663 CN1262114C (en) | 2003-05-15 | 2003-05-15 | Controlling apparatus for TV secondary pictures and controlling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03111663 CN1262114C (en) | 2003-05-15 | 2003-05-15 | Controlling apparatus for TV secondary pictures and controlling method thereof |
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| Publication Number | Publication Date |
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| CN1549584A CN1549584A (en) | 2004-11-24 |
| CN1262114C true CN1262114C (en) | 2006-06-28 |
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| CN 03111663 Expired - Fee Related CN1262114C (en) | 2003-05-15 | 2003-05-15 | Controlling apparatus for TV secondary pictures and controlling method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102523390A (en) * | 2011-12-08 | 2012-06-27 | 成都东方盛行电子有限责任公司 | Automatic aspect ratio control method based on AFD (automatic feeding device) |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Owner name: NANJING LG XINGANG DISPLAY CO., LTD. Free format text: FORMER OWNER: LG ELECTRONICS (SHENYANG) CO., LTD. Effective date: 20070420 |
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Effective date of registration: 20070420 Address after: 210038 No. 346 Yao Yao Avenue, Nanjing economic and Technological Development Zone, Jiangsu, China Patentee after: LG Electronics Nanjing Display Co., Ltd. Address before: 110179 35,40, hi tech Development Zone, Liaoning, Shenyang Patentee before: LG Electronic (Shenyang) Co., Ltd. |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060628 |