CN1674654A - Rear-projection television and picture protection function releasing method - Google Patents
Rear-projection television and picture protection function releasing method Download PDFInfo
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- CN1674654A CN1674654A CN 200410021463 CN200410021463A CN1674654A CN 1674654 A CN1674654 A CN 1674654A CN 200410021463 CN200410021463 CN 200410021463 CN 200410021463 A CN200410021463 A CN 200410021463A CN 1674654 A CN1674654 A CN 1674654A
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Abstract
The present invention relates to a rear screen projection television and its picture protection function removing method. Said method has the following steps: in the rear screen projection television with laser detection portion a first stage for detecting the inputted image signal which is static image or not; a second stage for executing picture protection function, if the detected image is static image; a third stage for utilizing laser detection portion to judge that laser signal is detected or not, if the picture protection function is executed; and a fourth stage for removing picture protection function, if the laser signal is detected. Under the condition of executing picture projection function if the user utilizes laser spot, etc. to transmit the laser signal, the picture protection function can be automatically removed.
Description
Affiliated technical field
The present invention will be referred to TV; especially will relate to and utilize rear-projection TV to show and when removing to carry out the picture defencive function; the user utilizes laser designator that laser signal is sent to screen, and rear-projection TV and picture defencive function thereof that the picture defencive function is automatically terminated automatically terminate method.
Background technology
Usually, rear-projection TV (Projection Television) uses the display unit that three picture tubes (red, green, indigo plant) amplify picture basically.In order to make the demonstration optimization of rear-projection TV, the most important thing is to aim at the synchronous of three picture tubes, make R (red), G (green), B (indigo plant) three look unanimities.
The perceptual quality of this rear-projection TV is by W/U (white uniformity), and B/U (brightness uniformity) focuses on, focus, and various projects such as distortion constitute.
, focus on the R that refers to from the electron gun emission here, G, the B electron beam converges to the situation of a point on the picture by under the action of a magnetic field of deflecting coil.Because deflecting coil is unusual, if perhaps electron beam deflection on request under the effect in magnetic field will produce the focusing mistake so, thereby the colour cast phenomenon will occur on picture.
That is to say, RGB, three electron beams correctly converge on the point and just can obtain white, but, can see on the next door of white line so having redness, green if focus on mistake, the line of improper other colors such as blueness will become the principal element that reduces image quality.
In addition, for display white, from R, G, the light of each picture tube projection of B should converge to a place.Here, with R, G, the light of B converges the automatic focus of process appellation to a place; Along with the beginning of digital television broadcasting, as adapting to the display device that big picture requires, rear-projection TV is subjected to people's favor recently.
And, in order to improve this problem, using the method for defocus automatically now.
Below, with reference to accompanying drawing, the structure of the rear-projection TV of conventional art is described.
Fig. 1 is the rear-projection TV structured flowchart of conventional art.
The rear-projection TV of conventional art as shown in Figure 1, is made of following components, that is: be provided with from broadcast singal by antenna 1 input, the broadcast singal of the certain frequency band of selective reception, and in the broadcast singal that receives, the tuner/IF2 of demodulation intermediate frequency composition; Be provided with the switch portion 3 of the picture signal that is used for the output of selecting tuning device/IF2 or receives from external equipment; Be provided with from the relevant broadcast singal that receives by switch portion 3, receive after the acoustic signal, the tone control portion 4 that its tone is controlled; Be provided with the output of amplifying tone control portion 4, and the amplifier of exporting by loud speaker 65; Be provided with and the literal by switch portion 3 output or icon are carried out colourity handle, so that make it be shown to colourity handling part 11 on the picture tube; In system each one of being provided with provides the power supply unit 7 of power supply; Be provided with the power supply that reception provides by power supply unit 7, and instruct the microcomputer 9 of exporting associated control signal according to the requirement of the user by remote controller 8 input; Be provided with control signal, show OSD (screen display) control part 10 of the reference signal when general information and auto color are consistent according to microcomputer 9; Be provided with control signal, the picture signal that obtains handling in colourity handling part 11 is converted to the standard converter 12 that an energy shows on picture according to microcomputer 9; Be provided with the image enlarging section 13 of the output that is used for amplifying standard converter 12; Be provided with to be received in and obtain in the image enlarging section 13 after the enlarged image signal it being carried out the deflector 16 of deflection; Be provided with the screen 17 that is used for being presented at the picture signal that is deflected in the deflector 16; Be provided with according to the control signal of microcomputer 9 and control, so that in deflector 16, form the deflection control part 14 of deflection; Be provided with the value that the automatic coloured consistent detecting means 18a～18h from the regulation field that is arranged on screen 17 obtains detecting, adjust relatively afterwards with the fiducial value of having set, so that can remove to proofread and correct the automatic coloured consistent control part 15 of focusing.
Below, the course of work of rear-projection TV with this conventional art structure is described.
At first, if the user instructs by remote controller 8 input services, power supply unit 7 provides power supply to microcomputer 9 and each one so, and microcomputer 9 is exported control signal to tuner/IF2, so that allow the user can remove to select the television channel of own wish.
In addition, switch portion 3 will be according to the control signal of microcomputer 9, go to select the picture signal of output from tuner/IF2 output, perhaps by external equipment (PC: some in Shu Ru picture signal personal computer); And tone control portion 4 will go to control, so that go to receive the acoustic signal by switch portion 3 outputs, and export by loud speaker 6 again.
In addition, the picture signal by switch portion 3 is selected will be input to colourity handling part 11, and obtain handling according to the control signal of microcomputer 9, so that can demonstrate the form of literal and icon etc.The picture signal that obtains handling in colourity handling part 11 will be input to standard converter 12; Standard converter 12 will go to adjust standard, so that can go to obtain certain output.
Then, in standard converter 12, the signal that obtains changing obtains through image enlarging section 13 amplifying, and obtains the enlarged image signal by deflector 16, obtains deflection by the control signal of deflection control part 14, and outputs to screen 17.
In addition, automatic coloured consistent control part 15, will be to control signal of deflector 16 outputs, so that after the value that the automatic coloured consistent detecting means 18a～18h from the regulation field that is arranged on screen 17 obtains detecting, go to compensate and compared difference afterwards, focus on from dynamic(al) correction so that go with the fiducial value of having set.
In addition; except that passing through the picture signal of antenna 1; when the input of the external equipment of selecting PC etc.; will go to show picture signal from the PC input; at this moment Shu Ru picture signal major part all is a rest image; if therefore more than certain hour, continue to show this image, will damage the PRT (protective circuit) and the screen 17 that constitute deflector 16 so, so will carry out with the similar a kind of function of PC picture defencive function.
That is to say that microcomputer 9 will remove to check the detection of dynamic integrator of standard converter 12; If more than certain hour, there is not the motion of picture signal, will start the picture defencive function so, carry out a kind of function that on picture, allows literal carry out random motion.
As described above, if the rear-projection TV of conventional art only removes to import rest image more than certain hour, change the picture defencive function so immediately over to; Yet, want to break away from from the picture defencive function, must can break away from by given specified key on the input remote controller; Therefore the user for using laser designator to show owing to need reuse remote controller, becomes inconvenient.
Summary of the invention
The present invention develops in order to address these problems.Its purpose is to provide a kind of rear-projection TV and picture defencive function release method thereof, so that import rest image, has started under the situation of picture defencive function, also can allow the user remove to remove the picture defencive function at an easy rate.
In order to achieve the above object, rear-projection TV of the present invention is having tuner/IF, screen display control part and screen, and in the rear-projection TV that can get in touch with laser designator, have the following structures feature, that is: be provided with the laser sending part that sends laser signal according to user's input; Be provided with output selectively by tuner/IF, perhaps the switch portion of the picture signal of external equipment input; Be provided with to making picture signal, can obtain showing, be used for deflection and adjust the deflector that focuses on by screen by switch portion output; Be provided with when the picture signal that obtains exporting by screen is presented at screen, be used for detecting the wrong automatic coloured consistent detecting means whether usefulness takes place of focusing; Be provided with the laser detection portion that is used for detecting from laser sending part output laser; Be provided with and receive by the detected value of a plurality of automatic coloured consistent detecting means, and according to screen display output set the result that fiducial value is compared, go to export a control signal, make and in deflector, adjust the automatic coloured consistent control part that focuses on usefulness automatically; Be provided with microcomputer; this microcomputer is exported control signal to switch portion; so that export the picture signal of user intention according to the instruction of customer requirements; if by the still frame of switch portion more than the input stipulated time; this microcomputer is with deactivation picture defencive function so; and in the process of carrying out the picture defencive function, if by laser detection portion input detection signal, this microcomputer will remove to remove the picture defencive function so.
Also having an architectural feature is that automatic coloured consistent detecting means is installed on the assigned position of screen.
Also having an architectural feature is that automatic coloured consistent detecting means is installed on the assigned position of PRT camera lens part.
To achieve the above object, the present invention includes the following stage: in the rear-projection TV that has laser detection portion, being provided with the picture signal that detects input is the rest image whether stage; If be provided with detected image is rest image, the stage of so just removing to carry out the picture defencive function; Carry out the picture defencive function if be provided with, judge the judgement stage whether laser signal is detected by laser detection portion so; Detect laser signal if be provided with, so just gone to remove the releasing stage of picture defencive function.
Also have, the picture signal of above-mentioned detection input is the rest image whether stage, will have following phase characteristic, is provided with the stage that is used for setting the detection reference time that is:; If the value that is provided with the register that is used for detecting motion in the time period of setting will be judged into the stage of rest image so less than zero.
Also have, the stage of above-mentioned execution picture defencive function, will have following phase characteristic, if that is: be judged as rest image, and the setting detection reference time of record is zero, will remove to carry out the picture defencive function by the program of having set so.
Also have, the judgement stage whether above-mentioned laser signal is detected, will have following phase characteristic, that is: the laser detection register value that detects from laser detection portion will be judged the stage that has become to import laser signal so greater than zero.
Advantageous effect of the present invention:
Rear-projection TV of the present invention and picture protection release method thereof; carrying out under the situation of picture defencive function because of the rest image more than the input certain hour; if utilizing laser spots to wait, the user sends laser signal; so just can automatically terminate the picture defencive function; therefore for the user who utilizes laser spots to show, will have more convenient effect.
Description of drawings
Fig. 1 is the rear-projection TV structured flowchart of conventional art.
Fig. 2 is a rear-projection TV structured flowchart of the present invention.
Fig. 3 and Fig. 4 are rear-projection TV working state figures of the present invention.
Fig. 5 is the workflow diagram of rear-projection TV picture defencive function release method of the present invention.
The symbol description of accompanying drawing major part
101: antenna 102: tuner/IF (intermediate frequency)
103: switch portion 104: tone control portion
105: amplifier 106: loud speaker
107: power supply unit 108: remote controller
109: microcomputer 110:OSD (screen display) control part
111: colourity handling part 112: standard converter
113: image enlarging section 114: the deflection control part
115: automatic coloured consistent control part 116: deflector
117: screen 118a～118h: automatic coloured consistent detecting means
Embodiment
Below, with reference to accompanying drawing, be described in more details for rear-projection TV of the present invention and picture protection release method thereof.
Fig. 2 is a rear-projection TV structured flowchart of the present invention; Fig. 3 and Fig. 4 are rear-projection TV working state figures of the present invention; Fig. 5 is the workflow diagram of rear-projection TV picture defencive function release method of the present invention.
Rear-projection TV of the present invention, as illustrated in Figure 2, constitute by following several sections, that is: be provided with from broadcast singal by antenna 101 inputs, the broadcast singal of the certain frequency band of selective reception, and in the broadcast singal that receives, the tuner/IF102 of demodulation intermediate frequency composition; Be provided with the switch portion 103 of the picture signal that is used for the output of selecting tuning device/IF102 or receives from external equipment; Be provided with from the relevant broadcast singal that receives by switch portion 103, receive after the acoustic signal, the tone control portion 104 that its tone is controlled; Be provided with the output of amplifying tone control portion 104, and the amplifier of exporting by loud speaker 106 105; Be provided with and the literal by switch portion 103 output or icon are carried out colourity handle, so that make it be shown to colourity handling part 111 on the picture tube; In system each one of being provided with provides the power supply unit 107 of power supply; Be provided with the power supply that reception provides by power supply unit 107, and instruct the microcomputer 109 of exporting associated control signal according to the requirement of the user by remote controller 108 input; Be provided with control signal, show OSD (screen display) control part 110 of the reference signal when general information and auto color are consistent according to microcomputer 109; Be provided with control signal, the picture signal that obtains handling in colourity handling part 111 is converted to the standard converter 112 that an energy shows on picture according to microcomputer 109; Be provided with the image enlarging section 113 of the output that is used for amplifying standard converter 112; Be provided with to be received in and obtain in the image enlarging section 113 after the enlarged image signal it being carried out the deflector 116 of deflection; Be provided with the screen 117 that is used for being presented at the picture signal that is deflected in the deflector 116; Be provided with according to the control signal of microcomputer 109 and control, so that in deflector 116, form the deflection control part 114 of deflection; Be provided with the value that the automatic coloured consistent detecting means 118a～118h from the regulation field that is arranged on screen 117 obtains detecting, adjust relatively afterwards with the fiducial value of having set, so that can remove to proofread and correct the automatic coloured consistent control part 115 of focusing; Be provided with the laser detection portion 119 that is mapped to the laser on the screen 117 of detecting.
Below, the course of work of rear-projection TV of the present invention with said structure is described.
At first, if the user is by remote controller 108 input services instruction, power supply unit 107 provides power supply to microcomputer 109 and each one so, and microcomputer 109 is exported control signal to tuner/IF102, so that allow the user can remove to select the television channel of own wish.
In addition, switch portion 103 will be according to the control signal of microcomputer 109, go to select the picture signal of output from tuner/IF102 output, perhaps by external equipment (PC: some in Shu Ru picture signal personal computer); And tone control portion 104 will go to control, so that go to receive the acoustic signal by switch portion 103 outputs, and export by loud speaker 106 again.
In addition, the picture signal by switch portion 103 is selected will be input to colourity handling part 111, and obtain handling according to the control signal of microcomputer 109, so that can demonstrate the form of literal and icon etc.The picture signal that obtains handling in colourity handling part 111 will be input to standard converter 112; Standard converter 112 will go to adjust standard, so that can obtain certain output.
Then, in standard converter 112, the signal that obtains changing obtains through image enlarging section 113 amplifying, and obtains the enlarged image signal by deflector 116, obtains deflection by the control signal of deflection control part 114, and outputs on the screen 117.
In addition, automatic coloured consistent control part 115, will be to control signal of deflector 116 outputs, so that after the value that the automatic coloured consistent detecting means 118a～118h from the regulation field that is arranged on screen 117 obtains detecting, go to compensate and compared difference afterwards, focus on from dynamic(al) correction so that go with the fiducial value of having set.
In addition; except that passing through the picture signal of antenna 101; when the input of the external equipment of selecting PC etc.; will go to show picture signal from the PC input; at this moment Shu Ru picture signal major part all is a rest image; if therefore more than certain hour, continue to show this image, will damage the PRT (protective circuit) and the screen 117 that constitute deflector 116 so, so will carry out with the similar a kind of function of PC picture defencive function.
That is to say that microcomputer 109 will remove to check the detection of dynamic integrator of standard converter 112; If more than certain hour, there is not the motion of picture signal, will start the picture defencive function so, carry out a kind of function that on picture, allows literal carry out random motion.
In addition; in the process of carrying out the picture defencive function; if the user waits by outside laser spots and sends laser signal, the some transducers among so automatic coloured consistent detecting means 118a～118h will detect this signal, and to laser detection portion 119 output detection signals.
At this moment, automatic coloured consistent detecting means 118a～118h as shown in FIG. 3, is installed on the assigned position of screen 117 usually, but as shown in FIG. 4, automatic coloured consistent detecting means 140 also can be installed on the assigned position of the PRT camera lens part that forms deflector 116.
This be because, general rear-projection TV, as illustrated in Figure 2, common R, G, B uses the camera lens of oneself respectively separately, but recently do not need automatic coloured consistent detecting means as LCD (LCD) or DLP (digital optical signal processing) projection TV, have from the rear-projection TV of a light source output image structure, as shown in FIG. 4, substitute a plurality of transducers with a detecting means, can be installed to this detecting means on the PRT camera lens part that is located on the TV body certain position.
Then, laser detection portion 119 receives after the detection signal, the signal that detects is outputed to microcomputer 109, so microcomputer 109 will remove to remove the automatic picture defencive function.
That is to say, as shown in FIG. 3, (diagram is omitted) sends laser signal 130 to screen 117 if the user utilizes laser spots, this laser signal 130 flies to e so) direction, reflection through speculum 120, a part of light directive f wherein) direction, and obtain detecting by the automatic coloured consistent detecting means 118e that is installed in screen 117.
In addition, if laser directive other direction, i.e. direction c), so through the reflection of speculum 120, a part of light directive d wherein) direction, and obtain detecting by the automatic coloured consistent detecting means 118a that is installed in screen 117.
In addition, as shown in FIG. 4, when automatic coloured consistent detecting means 140 is installed on the assigned position of PRT camera lens part of deflector 116, no matter laser signal 130 to which direction sends, mirror 120 reflection that will be reflected, and along the direction d that automatic coloured consistent detecting means 140 is housed), f) detect.
So by automatic coloured consistent detecting means 118a, the signal that 118e obtains detecting will be input to laser detection portion 119, through judge to receive laser signal whether after, be communicated to microcomputer 109.
Below, with reference to accompanying drawing 5, to having the present invention of said structure, promptly the picture defencive function release method of rear-projection TV describes.At first, with the parameter initialization, remove to set (setting-up time=5 minute) S11 fiducial time of being used for judging rest image then.
Then, remove to carry out main routine (TV operation) S12 according to control signal
Then, read also storing moving detected register value (M) S13.
Whether judgement motion detection register value (M) after testing is greater than zero S14.
At this moment, go to judge whether that the purpose greater than zero is in order to judge whether the dynamic image or the rest image of motion.
Then, the S14 as a result of judgement if motion detection register value (M) is so just judged into moving image greater than 0, resets fiducial time (setting-up time=5 minute) again, resets to the stage S15 that carries out on the main routine S12 then.
In addition, the S14 as a result of judgement if motion detection register value (M) is not more than 0, so just judges into rest image, has removed to judge whether all to cross fiducial time of setting the stage S15 ' of (setting-up time=5 minute).
The S15 ' as a result that judges does not arrive fiducial time of setting (setting-up time=5 minute) if, and will reset to so and carry out on the main routine S12.
Then, the S15 ' as a result of judgement if spent fiducial time of setting (setting-up time=5 minute), will remove to carry out picture defencive function S16 so.
Then, read and be stored in carry out the picture defencive function during laser detection register value (L) S17.
Then, go to judge that whether the laser detection register value (L) that reads is greater than 0 S18.Here, if laser detection register value (L) so just means in laser detection portion 119 to have detected laser signal greater than zero.
The S18 as a result that judges is if laser detection register value (L) so just removes to remove picture defencive function S19 greater than zero.
Then, if the user imports the instruction of power cutoff, will finish all routine S20 so.
As described above; rear-projection TV of the present invention and picture defencive function release method thereof consider that following situation develops; that is: when utilizing rear-projection TV to show; the picture signal major part that receives from external equipment (PC) all is a rest image; and if rest image so just will be carried out the picture defencive function.Therefore, if detect the above rest image of certain hour, will automatically perform the picture defencive function so; And when the user shows,, can automatically remove the picture defencive function so if send laser signal from the laser spots of using.
In addition, as another example of the present invention, utilize other luminescent device of non-laser also to can be used as the solution of the present invention.
Claims (5)
1, rear-projection TV is having tuner/IF, screen display control part and screen, and in the rear-projection TV that can get in touch with laser designator, it is characterized in that it is to be made of following structure:
Be provided with the laser sending part that sends laser signal according to user's input;
Be provided with output selectively by tuner/IF, perhaps the switch portion of the picture signal of external equipment input;
Be provided with to making picture signal, can obtain showing, be used for deflection and adjust the deflector that focuses on by screen by switch portion output;
Be provided with when the picture signal that obtains exporting by screen is presented at screen, be used for detecting the wrong automatic coloured consistent detecting means whether usefulness takes place of focusing;
Be provided with the laser detection portion that is used for detecting from laser sending part output laser;
Be provided with and receive by the detected value of a plurality of automatic coloured consistent detecting means, and according to screen display output set the result that fiducial value is compared, go to export a control signal, make and in deflector, adjust the automatic coloured consistent control part that focuses on usefulness automatically;
Be provided with microcomputer; this microcomputer is exported control signal to switch portion; so that export the picture signal of user intention according to the instruction of customer requirements; if by the still frame of switch portion more than the input stipulated time; this microcomputer is with deactivation picture defencive function so; and in the process of carrying out the picture defencive function, if by laser detection portion input detection signal, this microcomputer will remove to remove the picture defencive function so.
2, the release method of rear-projection TV picture defencive function is characterized in that it comprises the following stage: in the rear-projection TV that has laser detection portion,
Being provided with the picture signal that detects input is the rest image whether stage;
If be provided with detected image is rest image, the stage of so just removing to carry out the picture defencive function;
Carry out the picture defencive function if be provided with, judge the judgement stage whether laser signal is detected by laser detection portion so;
Detect laser signal if be provided with, so just gone to remove the releasing stage of picture defencive function.
3, the release method of rear-projection TV picture defencive function according to claim 2 is characterized in that the described detection rest image whether stage, also comprises the following stage:
Be provided with the stage that is used for setting the detection reference time;
If the value that is provided with the register that is used for detecting motion in the time period of setting will be judged into the stage of rest image so less than zero.
4, according to the release method of claim 2 and 3 described rear-projection TV picture defencive functions, it is characterized in that the stage of described execution picture defencive function, also comprise:
If be judged as rest image, and the setting detection reference time of record is zero, will remove to carry out the picture defencive function by the program of having set so.
5, the release method of rear-projection TV picture defencive function according to claim 2 is characterized in that the judgement stage whether described laser signal is detected, and also comprises:
The laser detection register value that detects from laser detection portion will be judged the stage that has become to import laser signal so greater than zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410021463 CN1674654A (en) | 2004-03-25 | 2004-03-25 | Rear-projection television and picture protection function releasing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410021463 CN1674654A (en) | 2004-03-25 | 2004-03-25 | Rear-projection television and picture protection function releasing method |
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| CN1674654A true CN1674654A (en) | 2005-09-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101896867B (en) * | 2007-11-07 | 2012-01-25 | 豪威科技有限公司 | Apparatus and method for tracking a light pointer |
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2004
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101896867B (en) * | 2007-11-07 | 2012-01-25 | 豪威科技有限公司 | Apparatus and method for tracking a light pointer |
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