CN101964173A - Method for improving display frequency of fixed chain length - Google Patents
Method for improving display frequency of fixed chain length Download PDFInfo
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Abstract
The invention discloses a method for improving the display frequency of fixed chain length, which comprises preset step and steps for intercepting, sending and displaying, wherein the preset step comprises: A1. setting effective digit L; and the steps for intercepting, sending and displaying comprise: B1. reducing the length of a data chain of display data to be L, and displaying the modified display data. The invention reduces the chain length of the display data, thus correspondingly reducing the display time, increasing the effective display times within the equal time, improving the display refreshing frequency and the display quality, avoiding the overhigh loss of brightness, and effectively enhancing the low gray scale display capability on the premise of maintaining the display accuracy not to be changed all the time.
Description
Technical field
The present invention relates to the control of LED display, in particular, a kind of fixedly chain length improves the method for display frequency.
Background technology
In the LED display, the display quality of LED display and the display frequency of LED display, promptly refreshing frequency has the relation of direct ratio, and display frequency is high more, and screen epigraph flickering is just more little, and stability is also just high more, and display quality is also high more.
Yet in the prior art, the method for various raising display frequencies all is to be condition with the sacrificing luminance, for example, reaches the raising of display frequency by the clock frequency that changes control device, does like this that not only power consumption is higher, and display brightness is lower.
Therefore, there is defective in prior art, needs to improve.
Summary of the invention
Technical matters to be solved by this invention is by improving display frequency to promote display quality.
Technical scheme of the present invention is as follows:
A kind of fixedly chain length improves the method for display frequency, and it comprises and followingly pre-sets step and apparent step is sent in intercepting, wherein, pre-sets step and comprises: A1, number of significant digit L is set; Intercepting is sent and shown step and comprise: B1, for video data is L with its data chainning contraction in length, shows as amended video data.
Be applied to technique scheme, in the described method, before the described steps A 1, go back execution in step A0: the figure place N that obtains described video data; And, in the described steps A 1, be provided with or select described number of significant digit L according to the N value.
Be applied to above-mentioned each technical scheme, in the described method, among the described step B1,,, show as amended video data from the output of high position intercepting L bit data for video data.
Being applied to above-mentioned each related art scheme, in the described method, among the described step B1, according to described number of significant digit L, for the described video data of N bit length, is 1 from first high position, intercepts the output of L bit data in turn.
Be applied to above-mentioned each related art scheme, in the described method, among the described step B1,,, show as amended video data from the output of most significant digit intercepting L bit data for video data.
Be applied to above-mentioned each related art scheme, in the described method, before the described step B1, go back execution in step B0:, judge its highest nonzero digit M for video data; And, among the described step B1,, begin to intercept the output of L bit data from the M position for video data.
Be applied to technique scheme, in the described method, after the described step B0, before the described step B1, go back execution in step B01: whether the figure place N that judges described video data shows otherwise directly export described video data greater than L.
Be applied to technique scheme, in the described method, after the described step B01, before the described step B1, go back execution in step B02: whether judge M greater than L, otherwise directly begin to intercept the output of L bit data from the L position.
Be applied to above-mentioned each related art scheme, in the described method, after the described step B1, go back execution in step B2: adopt described amended video data to show.
Be applied to technique scheme, in the described method, among the step B2, in a time period,, shorten the demonstration time of corresponding video data, increase the effective degree of data presentation according to the video data that has shortened the data chain lengths after revising.
Adopt such scheme, the present invention is by shortening the video data chain length, thereby the corresponding shortening demonstration time, therefore, in the equal time period, increased the demonstration effective degree, improved the demonstration refreshing frequency, thereby promoted display quality, avoided the excessive loss of brightness, and remained at display precision and to have promoted low GTG display capabilities under the constant prerequisite effectively.
Description of drawings
Fig. 1 is the synoptic diagram of an embodiment;
Fig. 2 is the synoptic diagram of another embodiment.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
In the LED control system, display frequency perhaps is called the display frequency of complete GTG, corresponding the display cycle of complete GTG, be the pairing frequency of demonstration time of complete GTG, its highest switching response frequency, LED luma data numerical digit with The whole control system is relevant.Wherein, the complete GTG display cycle is that each numerical value of luma data all experiences the required full-time total length of clear and definite corresponding output procedure.For the ignition frequency of some significance bits, be that the LED per second of certain correspondence of luma data is lighted number of times; The output effective degree of a bit value was meant in the display cycle, a bit value institute's correspondence and the space effective output number of times more than a fundamental clock transformation period.The output effective frequency of a bit value is meant that the output effective degree of a bit value multiply by its corresponding complete GTG display frequency.
One embodiment of the present of invention are, a kind of fixedly chain length improves the method for display frequency, is a kind of display mode of fixedly video data precision, and it comprises and followingly pre-sets step and apparent step is sent in intercepting.
Wherein, pre-seting step comprises: A1, number of significant digit L is set; For example, number of significant digit L is 4,5, a natural number in the 6......255 scope.And for example, number of significant digit L be 4,5, a natural number in 6......128,129......255,256......510, the 511......65535 scope.Preferably, the figure place according to described video data is provided with described number of significant digit L; For example, the figure place of described video data is 16, and then L can be set to 12,10,8 or 7 or the like, and and for example, the figure place of described video data is 256, and then L can be set to 200,180,150 or 100 or the like.On this basis, a preferred example is before the described steps A 1, to go back execution in step A0: the figure place N that obtains described video data; And, in the described steps A 1, described number of significant digit L is set according to the N value; At this moment, common described number of significant digit L is less than N.Perhaps, according to certain maximum brightness loss percentage, described number of significant digit L is set; For example, suppose that the maximum brightness loss percentage must not be higher than 10%, described number of significant digit L then is set in view of the above.In above-mentioned each example, can also set up the relation table of a N value and L value, select described number of significant digit L according to the N value.Perhaps, can also set up the relation table of a maximum brightness loss percentage and L value, select described number of significant digit L according to the maximum brightness loss percentage.
Intercepting is sent and shown step and comprise: B1, for video data is L with its data chainning contraction in length, shows as amended video data.It is pointed out that as space is limited following example selects for use the data below 24 to describe usually, still, the present invention and each embodiment thereof do not do additional limits to the figure place of video data, only need to shorten its data chainning length and get final product.
An example is among the described step B1, for video data, from the output of high position intercepting L bit data, to show as amended video data.For example, for video data,, show as amended video data from the output of most significant digit intercepting L bit data.Suppose that a certain video data is 16, as shown in the table:
| Figure place | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
| Data | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 1 |
L is 13 o'clock, is then thrown aside for minimum 3 of former video data, and amended video data is 13, and is as shown in the table:
| Figure place | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
| Data | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 0 |
When L is other numerical value, by that analogy, does not do and give unnecessary details.
And for example, for video data,, show as amended video data from the output of inferior high-order intercepting L bit data.Suppose that a certain video data is 12, as shown in the table:
| Figure place | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
| Data | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 1 | 0 | 1 |
L is 10 o'clock, is then thrown aside for minimum 3 of former video data, and amended video data is 13, and is as shown in the table:
| Figure place | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
| Data | 0 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 1 | 0 |
When L is other numerical value, by that analogy, does not do and give unnecessary details.
Another example is, among the described step B1, according to described number of significant digit L, for the described video data of N bit length, is 1 from first high position, intercepts the output of L bit data in turn.For example, a certain video data is 16, i.e. N=16 is as shown in the table:
| Figure place | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
| Data | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | 0 |
First high position is that 1 figure place is the 13rd, when L is 9, is then thrown aside for the highest 3 and minimum 4 of former video data, and amended video data is 9, and is as shown in the table:
| Figure place | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
| Data | 1 | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 1 |
When L is other numerical value, by that analogy, does not do and give unnecessary details.
And for example, N=8, a certain video data is 8, and is as shown in the table:
| Figure place | ?8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
| Data | ?0 | 0 | 1 | 1 | 0 | 0 | 1 | 0 |
First high position is that 1 figure place is the 6th, and when L was 6, then former video data was the highest 2 and thrown aside, and amended video data is 6, and is as shown in the table:
| Figure place | ?6 | 5 | 4 | 3 | 2 | 1 |
| Data | ?1 | 1 | 0 | 0 | 1 | 0 |
When L is other numerical value, by that analogy, does not do and give unnecessary details.
Be applied to above-mentioned each example, before the described step B1, go back execution in step B0:, judge its highest nonzero digit M for video data; And, among the described step B1,, begin to intercept the output of L bit data from the M position for video data.At this moment, revise the demonstration time of the demonstration time of back video data far below former video data.
For example, as shown in Figure 1, a certain video data is 16, and the highest nonzero digit M is 13, and L is 8,8 of intercepting back residues.
And for example, as shown in Figure 2, a certain video data is 8, and the highest nonzero digit M is 7, and L is 5,5 of intercepting back residues.
And for example, a certain video data is 18, and is as shown in the table:
| Figure place | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
| Data | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | 0 |
Its highest nonzero digit M is the 14th, when L is 8, among the described step B1, for video data, intercepts 8 bit data since the 14th and exports, and is then thrown aside for the highest 4 and minimum 6 of former video data, and amended video data is 8, and is as shown in the table:
| Figure place | ?8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
| Data | ?1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 |
When L is other numerical value, by that analogy, does not do and give unnecessary details.
Be applied to above-mentioned each relevant example, after the described step B0, before the described step B1, go back execution in step B01: whether the figure place N that judges described video data shows otherwise directly export described video data greater than L.That is to say,, directly export described video data and show if the numerical value of L during greater than the figure place N of described video data, need not be carried out intercepting and send apparent step.If the numerical value of L then can execution in step B1 during less than the figure place N of described video data.
For example, a certain video data is 12, and is as shown in the table:
| Figure place | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
| Data | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 1 |
When L is 20, among the described step B1,, exports described video data and show that amended video data is former video data for video data.Perhaps need not revise, directly output.
Be applied to example, after the described step B01, before the described step B1, go back execution in step B02: whether judge M greater than L, otherwise directly begin to intercept the output of L bit data from the L position.That is to say, if the numerical value of L during greater than the highest nonzero digit M of described video data, directly begins to intercept the output of L bit data from the L position.
For example, a certain video data is 24, and is as shown in the table:
| Figure place | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
| Data | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | 0 |
Its highest nonzero digit M is the 19th, when L is 20, among the described step B1, for video data, directly intercepts 20 bit data since the 20th and exports, and amended video data is 20, and is as shown in the table:
| Figure place | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
| Data | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | 0 |
If the numerical value of L during less than the figure place M of described video data, then can begin to intercept the output of L bit data from the M position.
Be applied to above-mentioned arbitrary example, in the described method, after the described step B1, execution in step B2 also: adopt described amended video data to show, for example, amended video data is delivered to chip for driving, and it is luminous or not luminous to drive corresponding LED lamp by it, thereby on LED display, show, obtain display effect.For example, among the step B2, in a time period,, shorten the demonstration time of corresponding video data, increase the effective degree of data presentation, thereby improved the demonstration refreshing frequency according to the video data that has shortened the data chain lengths after revising.
Like this, will lose part brightness at low level, lower but the luminance loss leads, promote low GTG display capabilities under the constant prerequisite thereby can remain at display precision.
The ultimate principle of the present invention and each embodiment thereof is, is target to improve the physics refreshing frequency, because the number of times of unit interval is exactly a frequency, therefore only need increase the number of times of effective demonstration output, just can reach good display effect.
Below the present invention and each embodiment thereof are described further.For spectators, effective greyscale resolution of its naked eyes is no more than 10, for example 8, therefore, in theory, naked eyes can't be differentiated the luminance difference below 2%, therefore, can suitably delete the part video data, bear certain loss, show refreshing frequency and improve at the highest luminance area or minimum brightness zone.
Preferred example is, to low data, only from the highest nonzero digit M, keeps the P bit data for height, and specifically, the data highest significant position down prolongs in turn automatically and shows that resolving accuracy to 8 or 10 end; Perhaps only keep the high L position that highest significant position M begins, be used for showing; Thereby on the basis of shortening whole display cycle time, promote the demonstration refreshing frequency.
For example, show GTG corresponding to 65536 grades, suppose 4 corresponding on the serial video data chain 16 video datas, show, be respectively 1010111010101010,0110101010101011,0010111010101100,0000001110101101 with binary code.Because naked eyes are for the relative adaptability function of brightness, different brightness only are that high number of significant digit is realized Presentation Function; Choose enough sufficient 8 the long display formats of visual effect; From the highest nonzero digit of these video datas, intercepting obtains 48 bit data: 10101110,11010101,10111010,11101011 respectively.All the other video datas by that analogy, like this, because the video data chain length is shortened, therefore institute, in the equal time period, shows that effective degree increases so that the demonstration time is shortened, and shows that refreshing frequency improves.
Need to prove that the mutual combination of above-mentioned each technical characterictic forms each embodiment, should be considered as the scope of instructions record of the present invention.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (10)
- One kind fixedly chain length improve the method for display frequency, it is characterized in that, may further comprise the steps,Pre-set step: A1, number of significant digit L is set;Intercepting send apparent step: B1, for video data, be L with its data chainning contraction in length, doFor amended video data shows.
- 2. method according to claim 1 is characterized in that, before the described steps A 1, goes back execution in step A0: the figure place N that obtains described video data;And, in the described steps A 1, be provided with or select described number of significant digit L according to the N value.
- 3. method according to claim 1 and 2 is characterized in that, among the described step B1, for video data, from the output of high position intercepting L bit data, shows as amended video data.
- 4. method according to claim 3 is characterized in that, among the described step B1, according to described number of significant digit L, for the described video data of N bit length, is 1 from first high position, intercepts the output of L bit data in turn.
- 5. method according to claim 3 is characterized in that, among the described step B1, for video data, from the output of most significant digit intercepting L bit data, shows as amended video data.
- 6. method according to claim 3 is characterized in that, before the described step B1, goes back execution in step B0: for video data, judge its highest nonzero digit M;And, among the described step B1,, begin to intercept the output of L bit data from the M position for video data.
- 7. method according to claim 6 is characterized in that, after the described step B0, before the described step B1, go back execution in step B01: whether the figure place N that judges described video data shows otherwise directly export described video data greater than L.
- 8. method according to claim 7 is characterized in that, after the described step B01, before the described step B1, goes back execution in step B02: whether judge M greater than L, otherwise directly begin to intercept the output of L bit data from the L position.
- 9. according to the arbitrary described method of claim 1 to 8, it is characterized in that, after the described step B1, go back execution in step B2: adopt described amended video data to show.
- 10. method according to claim 9 is characterized in that, among the step B2, in a time period, according to the video data that has shortened the data chain lengths after revising, shortens the demonstration time of corresponding video data, increases the effective degree of data presentation.
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| CN201010286513.5A CN101964173B (en) | 2010-09-19 | 2010-09-19 | A kind of fixing chain length improves the method for display frequency |
| US13/235,799 US8842141B2 (en) | 2010-09-19 | 2011-09-19 | Method of uniform distribution for increasing display rate |
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