CN103945255A - Displaying device and control method thereof - Google Patents
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- CN103945255A CN103945255A CN201410142715.0A CN201410142715A CN103945255A CN 103945255 A CN103945255 A CN 103945255A CN 201410142715 A CN201410142715 A CN 201410142715A CN 103945255 A CN103945255 A CN 103945255A
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Abstract
The invention provides a displaying device and a control method thereof. The displaying device comprises a control unit, a first signal receiving unit and a frame buffering unit. The first signal receiving unit is used for receiving a first signal input to the displaying device. When the displaying device is started, the control unit provides power for the frame buffering unit. A first information amount threshold value is stored in the displaying device. The control unit is used for detecting the first signal. When the control unit detects the fact that the information amount value of the first signal is larger than the first information amount threshold value, the control unit provides power for the frame buffering unit continuously. When the control unit detects that the information amount value of the first signal is smaller than or equal to the first information amount threshold value for several times continuously, the control unit stops providing power for the frame buffering unit. The effect of power saving can be achieved.
Description
Technical field
The present invention relates to the control method of a kind of display unit and display unit, relate in particular to and a kind ofly can close frame buffer unit to reach the display unit of power saving object and the control method of display unit without using frame buffer unit in the situation that.
Background technology
At present, on market, the display unit of high-order all needs frame buffer unit to deal with the demand of processing image data conventionally, the function of frame buffer unit is temporary image or for accelerated procedure execution speed, and by the control unit of display unit, temporary data is wherein done to some calculation process, generally in the time opening PIP function or process the picture of various different update frequencies, need to read and write the data of frame buffer unit, in other words be not, under all use situations, all to need to use frame buffer unit.Generally speaking; in the time that signal source stops outputing signal to display unit; display unit can enter sleep pattern; but; if user's set and display device is never closed display frame or entered screen protection formula after a period of time, display unit can't enter sleep pattern in this case, and frame buffer unit also can continue to consume electric energy; but now in fact do not need to use frame buffer unit, now just can cause the waste of electric energy.
Summary of the invention
For addressing the above problem, the present invention proposes the control method of a kind of display unit and display unit, the unlatching by control frame buffer unit and close to reach the object of power saving.
For achieving the above object, the present invention proposes a kind of display unit, comprises control unit, first signal receiving element and frame buffer unit; First signal receiving element is in order to receive the first signal that inputs to this display unit; In the time that this display unit is opened, this control unit is powered to this frame buffer unit; Wherein, in this display unit, store first information amount threshold value, this control unit is in order to detect this first signal, and when the information magnitude of this first signal detecting when this control unit is greater than this first information amount threshold value, this control unit continues power supply to this frame buffer unit; In the time that this information magnitude of this control unit this first signal that several detects continuously is less than or equal to this first information amount threshold value, this control unit stops power supply to this frame buffer unit.
As optional technical scheme, in the time that this information magnitude of this first signal is less than or equal to this first information amount threshold value, static or this display frame of the display frame of this display unit is screen protection formula.
As optional technical scheme, this display unit also includes this control unit of secondary signal and detects this first signal and this secondary signal simultaneously, when the information magnitude of this first signal detecting when this control unit is greater than this first information amount threshold value or/and this control unit and detects this secondary signal, this control unit continues power supply to this frame buffer unit; When this information magnitude of this first signal detecting continuously for several times when this control unit is less than or equal to this first information amount threshold and this control unit and does not detect this secondary signal, this control unit stops power supply to this frame buffer unit, this secondary signal be need to this frame buffer unit matching signal.
As optional technical scheme, this secondary signal is the wrong function signal of on-screen menu signal, picture-in-picture function signal, double-faced picture function signal or reciprocal cross.
As optional technical scheme, this display unit also includes counter, in this counter, predetermined threshold is set, when the number of times that the information magnitude that detects continuously this first signal when this control unit is less than or equal to this first information amount threshold value exceedes this predetermined threshold, this control unit stops power supply to this frame buffer unit.
As optional technical scheme, when this control unit stops power supply to behind this frame buffer unit, this control unit continues this first signal of detecting.
The present invention more proposes a kind of control method of display unit, and this display unit comprises frame buffer unit, and in the time that this display unit is opened, this frame buffer unit is opened, and the method comprising the steps of: step 1: receive the first signal that inputs to this display unit; Step 2: detect this first signal, in the time that the information magnitude of this first signal detecting is greater than first information amount threshold value, continue power supply to this frame buffer unit, when this information magnitude of this first signal detecting when continuous several is less than or equal to this first information amount threshold value, stop power supply to this frame buffer unit.
As optional technical scheme, in the time that this information magnitude of this first signal is less than or equal to this first information amount threshold value, static or this display frame of the display frame of this display unit is screen protection formula.
As optional technical scheme, step 2 also comprises: detect this first signal and secondary signal simultaneously, when the information magnitude of this first signal detecting is greater than this first information amount threshold value or/and while detecting this secondary signal, continue power supply to this frame buffer unit; When this information magnitude of this first signal detecting when continuous several is less than or equal to this first information amount threshold and does not detect this secondary signal, stop power supply to this frame buffer unit, this secondary signal be need to this frame buffer unit matching signal.
As optional technical scheme, this secondary signal is the wrong function signal of on-screen menu signal, picture-in-picture function signal, double-faced picture function signal or reciprocal cross.
As optional technical scheme, this step 2 also comprises: when detecting continuously the information magnitude of this first signal and be less than or equal to the number of times of this first information amount threshold value while exceeding predetermined threshold, stop power supply to this frame buffer unit.
As optional technical scheme, after this step 2, also comprise step: continue this first signal of detecting, in the time detecting this first signal, continue this step 2, in the time not detecting this first signal, continue this first signal of detecting.
Compared with prior art, display unit of the present invention can and be closed according to the unlatching of the information magnitude size control frame buffer unit of first signal, in the time judging without this frame buffer unit of use, control unit stops power supply to this frame buffer unit, to reach the object of power saving.
Brief description of the drawings
Fig. 1 is the structured flowchart of display unit of the present invention.
Fig. 2 is the control method flow chart of the display unit of first embodiment of the invention.
Fig. 3 is the control method flow chart of the display unit of second embodiment of the invention.
Fig. 4 is the control method flow chart of the display unit of third embodiment of the invention.
Embodiment
For making that object of the present invention, structure, feature and function thereof are had to further understanding, hereby coordinate embodiment to be described in detail as follows.
Display unit of the present invention as shown in Figure 1, the structured flowchart that Fig. 1 is display unit of the present invention, display unit of the present invention comprises control unit 100, first signal receiving element 103 and frame buffer unit 200; First signal receiving element 103 is in order to receive the first signal S1 that inputs to this display unit; In the time that this display unit is opened, this control unit 100 is powered to this frame buffer unit 200; Wherein, in this display unit, store first information amount threshold value Q, this control unit 100 is in order to detect this first signal S1, when the information magnitude Q1 of this first signal S1 detecting when this control unit 100 is greater than this first information amount threshold value Q, this control unit 100 continues power supply to this frame buffer unit 200; In the time that this information magnitude Q1 of this control unit 100 this first signal S1 that several detects is continuously less than or equal to this first information amount threshold value Q, this control unit 100 stops power supply to this frame buffer unit 200.
Wherein, this display unit also includes line buffer unit 102, this line buffer unit 102 is all the time in opening, in the time that this frame buffer unit 200 is opened, this frame buffer unit 200 and this line buffer unit 102 operate jointly, in the time that this frame buffer unit 200 is closed, this line buffer unit 102 operates separately, thereby ensures the normal operation of this display unit, in addition, in the time that this display unit is opened, this display unit can be defaulted as now this display unit need to use this frame buffer unit 200, and when this display unit is opened, this frame buffer unit 200 is also unlocked, but not as limit, this line buffer unit 102, this first signal receiving element 103 can be arranged in this control unit 100, and this frame buffer unit 200 can be independently parts, and this frame buffer unit 200 is electrically connected with this control unit 100, but not as limit, this first information amount threshold value Q is the critical value whether this display unit needs to use this frame buffer unit 200, when the information magnitude of the signal receiving when this display unit is greater than this first information amount threshold value Q, here it is example that the information magnitude Q1 of the first signal S1 receiving taking first signal receiving element 103 is greater than this first information amount threshold value Q, illustrate that now this display unit is in use state, for dealing with the execution demand of image data or other programs, now need to ensure that frame buffer unit 200 is in running order, and the information magnitude Q1 of the first signal S1 receiving when first signal receiving element 103 is while being less than or equal to this first information amount threshold value Q, judge that this display unit is in idle state, now can close this frame buffer unit 200, this idle state can be that static or this display frame of the display frame of this display unit is screen protection formula, now this display unit in idle state, for example, this display frame is logined interface for user, static screen defence program, this display frame is dynamic screen protection program, or, this display frame is static image frame etc., not as limit, only need to meet now without using this frame buffer unit 200.In the time that this control unit 100 stops power supply to this frame buffer unit 200, this display unit can realize power saving effect.
Fig. 2 is the control method flow chart of the display unit of first embodiment of the invention.In Fig. 1 and Fig. 2, this display unit also includes secondary signal receiving element 300, in order to receive the secondary signal S2 that inputs to this display unit, this secondary signal receiving element 300 can be arranged in this control unit 100, also can be independently parts, this control unit 100 is in order to detect this secondary signal S2, and in the time that this control unit 100 detects this secondary signal S2, this control unit 100 continues to power to this frame buffer unit 200; In the time that this control unit 100 does not detect this secondary signal S2, this control unit 100 this first signal of detecting S1.
Wherein, this display unit can not comprise this secondary signal receiving element 300, this secondary signal S2 can be directly the signal of this display unit inside, for example, this secondary signal S2 is on-screen menu signal (OSD, on-screen display), this on-screen menu signal is the data that is stored in this display unit itself, need not give this display unit by outside source input signal, this secondary signal S2 also can be picture-in-picture function signal, the wrong function signal of double-faced picture function signal or reciprocal cross, but not as limit, when this secondary signal S2 is during for as above signal, now this display unit need to read the data in this frame buffer unit 200, the cooperation that now this display unit need to this frame buffer unit 200, this control unit 100 needs continued power to this frame buffer unit 200, that is, after this display unit is opened, preferential this secondary signal of detecting of this control unit 100 S2, in the time that this control unit 100 detects this secondary signal S2, these control unit 100 continued powers are given this frame buffer unit 200, this control unit 100 continues this secondary signal of detecting S2, until this control unit 100 is not while detecting this secondary signal S2, this control unit 200 just starts to detect this first signal S1.
This display unit also includes counter 101, in this counter 101, predetermined threshold N is set, when the times N 1 that the information magnitude Q1 that detects continuously this first signal S1 when this control unit 100 is less than or equal to this first information amount threshold value Q exceedes this predetermined threshold N, this control unit 100 stops power supply to this frame buffer unit 200.Taking predetermined threshold N as 10, it is example that the frequency of control unit 200 this first signal of detecting S1 is 1 beat/min, when the information magnitude Q1 that detects for the first time this first signal S1 when this control unit 100 is less than or equal to this first information amount threshold value Q, this control unit 100 does not stop power supply to this frame buffer unit 200, but this control unit 100 continues this first signal of detecting S1, when the times N 1 that the information magnitude Q1 that detects continuously this first signal S1 when this control unit 100 is less than or equal to this first information amount threshold value Q exceedes predetermined threshold N, (now this control unit 100 has been detected (time is ten minutes) continuously ten times, and in this detecting process of ten times, the information magnitude Q1 of this first signal S1 is less than or equal to this first information amount threshold value Q all the time), now this control unit 100 stops power supply to this frame buffer unit 200, otherwise, be that the information magnitude Q1 of this first signal S1 is while being greater than this first information amount threshold value Q when there being arbitrarily situation once in the process of this control unit 200 continuous detecting ten times, this timer 101 makes zero, when the information magnitude Q1 that again detects this this first signal S1 at this control unit 200 is less than or equal to this first information amount threshold value Q, this counter 101 starts counting again.That is to say, when the times N 1 that the information magnitude Q1 that this control unit 100 detects this first signal S1 is continuously less than or equal to this first information amount threshold value Q does not reach this predetermined threshold N, this control unit 100 does not stop power supply to this frame buffer unit 200.
In addition, when this control unit 100 stops power supply to behind this frame buffer unit 200 through judgement, this control unit 100 still continues this first signal of detecting S1, when the information magnitude Q1 that detects this first signal S1 when control unit 100 is greater than this first information amount threshold value Q, this control unit 100 starts to power to this frame buffer unit 200.
Fig. 3 is the control method flow chart of the display unit of second embodiment of the invention.The flow process of this second embodiment and this first embodiment is roughly the same, and difference is the detecting of this control unit 100 for this secondary signal S2.In this second embodiment, this control unit 100 is detected this first signal S1 in advance, in the time that the information magnitude Q1 of this first signal S1 is less than or equal to this first information amount threshold value Q, this control unit 100 just removes to detect this secondary signal S2, in the time detecting this secondary signal S2, this control unit 100 continues to power to this frame buffer unit 200; In the time that this control unit 100 does not detect this secondary signal S2, this control unit 100 continues this first signal of detecting S1.
Fig. 4 is the control method flow chart of the display unit of third embodiment of the invention.In the 3rd embodiment, this control unit 100 is detected this first signal S1 and this secondary signal S2 simultaneously, when the information magnitude Q1 that detects this first signal S1 when this control unit 100 is greater than this first information amount threshold value Q or/and this control unit 100 and detects this secondary signal S2, this control unit 100 continues to power to this frame buffer unit 200; When the information magnitude Q1 that detects this first signal S1 when this control unit 100 is less than or equal to this first information amount threshold value Q and this control unit 100 and does not detect this secondary signal S2, this control unit 100 stops powering to this frame buffer unit 200, but not as limit; in the 3rd embodiment, when the information magnitude Q1 that detects this first signal S1 when this control unit 100 is less than or equal to this first information amount threshold value Q and this control unit 100 and does not detect this secondary signal S2, this control unit 100 does not stop powering to this frame buffer unit 200 immediately, this control unit 100 continues to detect this first signal S1 and this secondary signal S2 simultaneously, when the times N 1 that the information magnitude Q1 that detects continuously this first signal S1 when this control unit 100 is less than or equal to this first information amount threshold value Q exceedes predetermined threshold N and control unit 100 and does not detect this secondary signal S2, this control unit 100 just stops powering to this frame buffer unit 200, when the times N 1 that the information magnitude Q1 that detects continuously this first signal S1 when this control unit 100 is less than or equal to this first information amount threshold value Q does not exceed predetermined threshold N or/and control unit 100 and detects this secondary signal, this control unit 100 continues to power to this frame buffer unit 200, when the times N 1 that the information magnitude Q1 that now only has control unit 100 to detect continuously this first signal S1 is less than or equal to this first information amount threshold value Q exceeded predetermined threshold N and do not detect this secondary signal S2 within this detecting time of N1 time, this control unit 100 just stops powering to this frame buffer unit 200.Other of the 3rd embodiment are described similar the first embodiment, do not repeat them here.That is to say, in the 3rd embodiment, as long as this control unit 100 detects this secondary signal S2, or this control unit 100 detects this first signal S1 information magnitude Q1 while being greater than this first information amount threshold value Q, and this control unit 100 powers to this frame buffer unit 200.
The present invention also proposes a kind of control method of display unit, the control method of display unit of the present invention is used display unit as above, therefore, the control method of display unit of the present invention can corresponding above-mentioned display unit structure and form, function and above-mentioned explanation that concrete parts can be realized are similar, do not repeat them here, in conjunction with Fig. 1, this display unit comprises frame buffer unit 200, and in the time that this display unit is opened, this frame buffer unit 200 is opened.
As shown in Figure 2, the control method of this display unit comprises the steps:
Step 300: control unit 100 is powered to this frame buffer unit 200,, in the time that this display unit is opened, this frame buffer unit 200 is also opened;
Step 302: control unit 100 is detected secondary signal S2, in the time that this control unit 100 detects this secondary signal S2, get back to step 300, this control unit 100 continues power supply to this frame buffer unit 200, and this control unit 100 continues this secondary signal of detecting S2 simultaneously, when this control unit 100 does not detect this secondary signal S2, enter step 304, this secondary signal S2 is the wrong function signal of on-screen menu signal, picture-in-picture function signal, double-faced picture function signal or reciprocal cross;
Step 304: this control unit 100 this first signal of detecting S1, and whether the information magnitude Q1 that judges this first signal S1 is less than or equal to this first information amount threshold value Q, in the time judging that the information magnitude Q1 of this first signal S1 is non-and be less than or equal to this first information amount threshold value Q, get back to step 300, in the time judging that the information magnitude Q1 of this first signal S1 is less than or equal to this first information amount threshold value Q, enter step 306;
Step 306: this control unit 100 continues this first signal of detecting S1, judge whether the times N 1 that the continuous information magnitude Q1 that detects this first signal S1 of control unit 100 is less than or equal to first information amount threshold value Q exceedes predetermined threshold N, in the time judging that control unit 100 times N 1 that the information magnitude Q1 of this first signal of detecting S1 is less than or equal to first information amount threshold value Q does not continuously exceed predetermined threshold N, get back to step 304, in the time judging that control unit 100 times N 1 that the information magnitude Q1 of this first signal of detecting S1 is less than or equal to first information amount threshold value Q continuously exceedes predetermined threshold N, enter step 308,
Step 308: control unit 100 stops power supply to this frame buffer unit 200, and enters step 310;
Step 310: control unit 100 is detected first signal S1, and whether the information magnitude Q1 that judges this first signal S1 is less than or equal to this first information amount threshold value Q, when judging that the information magnitude Q1 of this first signal S1 is less than or equal to this first information amount threshold value Q, continue step 310, when judging non-this first information amount threshold value Q that is less than or equal to of information magnitude Q1 of this first signal S1, get back to step 300.
As shown in Figure 3, in this second embodiment, the control method of this display unit also can be:
Step 300 ': control unit 100 is powered to this frame buffer unit 200, and, in the time that this display unit is opened, this frame buffer unit 200 is also opened;
Step 302 ': this control unit 100 this first signal of detecting S1; and whether the information magnitude Q1 that judges this first signal S1 is less than or equal to this first information amount threshold value Q; in the time judging that the information magnitude Q1 of this first signal S1 is non-and be less than or equal to this first information amount threshold value Q; get back to step 300 '; in the time judging that the information magnitude Q1 of this first signal S1 is less than or equal to this first information amount threshold value Q, enter step 304 ';
Step 304 ': control unit 100 is detected secondary signal S2, in the time that this control unit 100 detects this secondary signal S2, get back to step 300 ', this control unit 100 continues power supply to this frame buffer unit 200, when this control unit 100 does not detect this secondary signal S2, enter step 306 ';
Step 306 ': this control unit 100 continues this first signal of detecting S1, judge whether the times N 1 that the continuous information magnitude Q1 that detects this first signal S1 of control unit 100 is less than or equal to first information amount threshold value Q exceedes predetermined threshold N, in the time judging that control unit 100 times N 1 that the information magnitude Q1 of this first signal of detecting S1 is less than or equal to first information amount threshold value Q does not continuously exceed predetermined threshold N, get back to step 304, in the time judging that control unit 100 times N 1 that the information magnitude Q1 of this first signal of detecting S1 is less than or equal to first information amount threshold value Q continuously exceedes predetermined threshold N, enter step 308 ',
Step 308 ': control unit 100 stops power supply to this frame buffer unit 200, and enters step 310 ';
Step 310 ': control unit 100 is detected first signal S1, and whether the information magnitude Q1 that judges this first signal S1 is less than or equal to this first information amount threshold value Q, when judging that the information magnitude Q1 of this first signal S1 is less than or equal to this first information amount threshold value Q, continue step 310 ', when judging non-this first information amount threshold value Q that is less than or equal to of information magnitude Q1 of this first signal S1, get back to step 300 '.
As shown in Figure 4, in the 3rd embodiment, the control method of this display unit also can be:
Step 300 ' ': control unit 100 is powered to this frame buffer unit 200, and, in the time that this display unit is opened, this frame buffer unit 200 is also opened;
Step 302 ' ': this control unit 100 is detected this first signal S1 and secondary signal S2 simultaneously, and judges whether the information magnitude Q1 of this first signal S1 is less than or equal to this first information amount threshold value Q, and judges whether to detect this secondary signal S2; When judging that the information magnitude Q1 of this first signal S1 is greater than this first information amount threshold value Q or/and while detecting this secondary signal S2; get back to step 300 ' '; in the time judging that the information magnitude Q1 of this first signal S1 is less than or equal to this first information amount threshold value Q and does not detect this secondary signal S2, enter step 304 ' ';
Step 304 ' ': control unit 100 continues to detect first signal S1 and secondary signal S2 simultaneously, and judge whether the times N 1 that amount of information Q1 that control unit 100 detects this first signal S1 is continuously less than or equal to this first information amount threshold value Q exceedes predetermined threshold N, and whether detect secondary signal S2; When the times N 1 that the information magnitude Q1 that detects continuously this first signal S1 when this control unit 100 is less than or equal to this first information amount threshold value Q exceedes predetermined threshold N and control unit 100 and do not detect this secondary signal S2, enter step 306 ' '; When the times N 1 that the information magnitude Q1 that detects continuously this first signal S1 when this control unit 100 is less than or equal to this first information amount threshold value Q does not exceed predetermined threshold N or/and control unit 100 and detects this secondary signal, get back to step 302 ' ';
Step 306 ' ': control unit 100 stops power supply to this frame buffer unit 200, and enters step 308 ' ';
Step 308 ' ': this control unit 100 is detected this first signal S1 and secondary signal S2 simultaneously, and judges whether the information magnitude Q1 of this first signal S1 is less than or equal to this first information amount threshold value Q, and judges whether to detect this secondary signal S2; When judging that the information magnitude Q1 of this first signal S1 is greater than this first information amount threshold value Q or/and while detecting this secondary signal S2, get back to step 300 ', in the time judging that the information magnitude Q1 of this first signal S1 is less than or equal to this first information amount threshold value Q and does not detect this secondary signal S2, continue step 308 ' '.
When the 3rd embodiment shows that times N 1 that the information magnitude Q1 that now only has control unit 100 to detect continuously this first signal S1 is less than or equal to this first information amount threshold value Q exceeded predetermined threshold N and do not detect this secondary signal S2 within this detecting time of N1 time, this control unit 100 just stops powering to this frame buffer unit 200.Other of the 3rd embodiment are described similar the first embodiment, do not repeat them here.That is to say, in the 3rd embodiment, as long as this control unit 100 detects this secondary signal S2, or this control unit 100 detects this first signal S1 information magnitude Q1 while being greater than this first information amount threshold value Q, and this control unit 100 powers to this frame buffer unit 200.
As the explanation of above-mentioned display device structure, display unit of the present invention also can include counter 101, in step 304 and step 306, can apply to this counter 101, and the operation principle of this counter 101 can be as the explanation in above-mentioned display device structure.
The present invention can judge whether this display unit needs to use this frame buffer unit 200 by the detecting function of control unit 100, in the time judging that this display unit does not need this frame buffer unit 200, control unit 100 stops power supply to this frame buffer unit 200, now can realize power saving effect.
The present invention is described by above-mentioned related embodiment, but above-described embodiment is only for implementing example of the present invention.Must be pointed out that, the embodiment having disclosed does not limit the scope of the invention.On the contrary, the change done without departing from the spirit and scope of the present invention and retouching, all belong to scope of patent protection of the present invention.
Claims (12)
1. a display unit, is characterized in that comprising:
Control unit;
First signal receiving element, in order to receive the first signal that inputs to this display unit; And
Frame buffer unit, in the time that this display unit is opened, this control unit is powered to this frame buffer unit;
Wherein, in this display unit, store first information amount threshold value, this control unit is in order to detect this first signal, and when the information magnitude of this first signal detecting when this control unit is greater than this first information amount threshold value, this control unit continues power supply to this frame buffer unit; In the time that this information magnitude of this control unit this first signal that several detects continuously is less than or equal to this first information amount threshold value, this control unit stops power supply to this frame buffer unit.
2. display unit as claimed in claim 1, is characterized in that: in the time that this information magnitude of this first signal is less than or equal to this first information amount threshold value, static or this display frame of the display frame of this display unit is screen protection formula.
3. display unit as claimed in claim 1, it is characterized in that: this display unit also includes secondary signal, this control unit is detected this first signal and this secondary signal simultaneously, when the information magnitude of this first signal detecting when this control unit is greater than this first information amount threshold value or/and this control unit and detects this secondary signal, this control unit continues power supply to this frame buffer unit; When this information magnitude of this first signal detecting continuously for several times when this control unit is less than or equal to this first information amount threshold and this control unit and does not detect this secondary signal, this control unit stops power supply to this frame buffer unit, this secondary signal be need to this frame buffer unit matching signal.
4. display unit as claimed in claim 3, is characterized in that: this secondary signal is the wrong function signal of on-screen menu signal, picture-in-picture function signal, double-faced picture function signal or reciprocal cross.
5. display unit as claimed in claim 1, it is characterized in that: this display unit also includes counter, in this counter, predetermined threshold is set, when the number of times that the information magnitude that detects continuously this first signal when this control unit is less than or equal to this first information amount threshold value exceedes this predetermined threshold, this control unit stops power supply to this frame buffer unit.
6. display unit as claimed in claim 1, is characterized in that: when this control unit stops power supply to behind this frame buffer unit, this control unit continues this first signal of detecting.
7. a control method for display unit, this display unit comprises frame buffer unit, in the time that this display unit is opened, this frame buffer unit is opened, and it is characterized in that the method comprising the steps of:
Step 1: receive the first signal that inputs to this display unit;
Step 2: detect this first signal, in the time that the information magnitude of this first signal detecting is greater than first information amount threshold value, continue power supply to this frame buffer unit, when this information magnitude of this first signal detecting when continuous several is less than or equal to this first information amount threshold value, stop power supply to this frame buffer unit.
8. the control method of display unit as claimed in claim 7, is characterized in that: in the time that this information magnitude of this first signal is less than or equal to this first information amount threshold value, static or this display frame of the display frame of this display unit is screen protection formula.
9. the control method of display unit as claimed in claim 7, is characterized in that: this step 2 also comprises:
Detect this first signal and secondary signal simultaneously, when the information magnitude of this first signal detecting is greater than this first information amount threshold value or/and while detecting this secondary signal, continue power supply to this frame buffer unit; When this information magnitude of this first signal detecting when continuous several is less than or equal to this first information amount threshold and does not detect this secondary signal, stop power supply to this frame buffer unit, this secondary signal be need to this frame buffer unit matching signal.
10. the control method of display unit as claimed in claim 9, is characterized in that: this secondary signal is the wrong function signal of on-screen menu signal, picture-in-picture function signal, double-faced picture function signal or reciprocal cross.
The control method of 11. display unit as claimed in claim 7, it is characterized in that: this step 2 also comprises: when detecting continuously the information magnitude of this first signal and be less than or equal to the number of times of this first information amount threshold value while exceeding predetermined threshold, stop power supply to this frame buffer unit.
The control method of 12. display unit as claimed in claim 7, is characterized in that: after this step 2, also comprise step:
Continue this first signal of detecting, in the time detecting this first signal, continue this step 2, in the time not detecting this first signal, continue this first signal of detecting.
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