CN101739939B - Device and method for displaying image - Google Patents
Device and method for displaying image Download PDFInfo
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- CN101739939B CN101739939B CN 200910258943 CN200910258943A CN101739939B CN 101739939 B CN101739939 B CN 101739939B CN 200910258943 CN200910258943 CN 200910258943 CN 200910258943 A CN200910258943 A CN 200910258943A CN 101739939 B CN101739939 B CN 101739939B
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Abstract
The invention provides a device and a method for displaying an image, wherein the technical scheme of the image displaying device comprises a first memory, a control chip, and a second memory, wherein the first memory stores a plurality of image adjusting functions which correspond to a plurality of average image level ranges respectively; the control chip is used for computing and storing the average image level of multiple frames of images before the current frame of image, the input end of the control chip is connected to the first memory, so that the control chip can read the image adjusting function corresponding to the average image level from the first memory according to the average image level and adjust the current frame of image according to the image adjusting function; and the second memory is connected to the output end of the control chip, so that the second memory can receive and store the adjusted current frame of image. In the device, the data of the current frame of image is not required to be buffered, so that the image displaying device avoids the use of the memory used for buffering the data of the current frame of image, and the circuit cost is lowered.
Description
Technical field
The present invention relates to field of display devices, more specifically, relate to a kind of image display device and method for displaying image.
Background technology
ACplasmadisplayunit (Alternating Current Plasma Display Panel, AC PDP) principle that multi-grey level shows is different from the mode of general display device, it is the mode of separating by subfield by the digital signal of RGB three looks of a two field picture, is divided into several subfields.Come illuminated in combination by the weight that each subfield is luminous different (namely keeping number of pulses different), so just can realize the gray level of 2 n power, n is the number of the subfield that is divided into.And be the device that belongs to from main light emission due to PDP, bombard inert gas in PDP display by high pressure, gas separates and sends ultraviolet, so usually can larger electric current be arranged at interdischarge interval.Keep the more discharge currents of pulse number larger, when a vertical frame dimension gray level image shows, each subfield needs discharge, keeping like this electric current can be very large, so at this moment need average picture level (the AveragePicture Level according to received image signal, APL) situation determines that each subfield keeps the quantity of pulse, is exactly that usually said automated power is controlled (Automatic Power Control, APC).
The control of automated power is to realize by increasing and decreasing the quantity of keeping pulse in each subfield, be not proportional to quantity and keep the pulsed discharge situation, so in the different discharge scenario differences under number of pulses of keeping, the effect that namely shows image is also different, so just need to be to the different phase of APL curve, select different GAMMA curves, video image is adjusted.
In order better to show image, need to be better the more refinement that the APL curve divides, as shown in Figure 1, show the schematic diagram of the corresponding GAMMA curve of APL curve at Fig. 1, APL's but the APL curve is divided thinner the time, the number of the GAMMA curve that each stage is corresponding is also just more, needs random access memory (Random Access Memory, the RAM) resource of storage GAMMA data also just larger.
Present control chip design, the RAM resource can't satisfy the storage of many GAMMA curves, and common way is the RAM of data write-once process chip FPGA inside, perhaps is stored in outside parallel FLASH.Fig. 2 shows the schematic diagram of image display device of the prior art, comprises control chip FPGA, and parallel FLASH and sub-field transformation buffer memory DDR and APL calculate the video data buffer memory DDR of use.
But in image display device of the prior art, data write-once internal RAM, can take the lifting that resource causes more greatly chip cost, being stored in outside parallel FLASH, due to parallel FLASH address wire and data line a lot, can increase number of pin and printed circuit board (PCB) (the Printed Circuit Board of control chip, PCB) difficulty of fabric swatch, increased simultaneously the number of plies of pcb board, and the APL according to present frame in prior art selects the GAMMA curve, need to data buffer storage one frame, can cause the increase of control circuit cost.
Summary of the invention
A technical matters to be solved by this invention is to provide a kind of image display device and method that does not need the buffer memory current image frame when view data is processed.
Another technical matters to be solved by this invention is to provide a kind of display device that can reduce PCB fabric swatch difficulty.
For solving above-mentioned at least one technical matters, according to an aspect of the present invention, provide a kind of image display device, comprising: first memory, store a plurality of Image Adjusting functions, a plurality of Image Adjusting functions correspond respectively to a plurality of average picture level scopes; Control chip, be used for calculating and storing the average picture level of current frame image multiple image before, the input end of control chip is connected to first memory, be used for reading the Image Adjusting function corresponding with average picture level according to average picture level from first memory, and according to this Image Adjusting function, current frame image adjusted; Second memory is connected to the output terminal of control chip, is used for receiving and store the current frame image after adjustment.
Preferably, in above-mentioned image display device, control chip is connected with first memory by serial ports or parallel port.
Preferably, in above-mentioned image display device, control chip has storage unit, is used for the average picture level of storage current frame image multiple image before.
Preferably, in above-mentioned image display device, control chip also has processing unit, is used for the average picture level of multiple image is compared, and selects the Image Adjusting function according to comparative result.
Preferably, in above-mentioned image display device, second memory is DDR.
For solving above-mentioned at least one technical matters, according to another aspect of the present invention, provide a kind of method for displaying image, comprise the following steps: select corresponding Image Adjusting function according to the average picture level of the multiple image before the storage current frame image; Utilize the Image Adjusting function that current frame image is adjusted.
Preferably, in said method, select the step of corresponding Image Adjusting function to comprise according to the average picture level of the multiple image before the storage current frame image: the average picture level M1 and the M2 that store current K frame two two field pictures before, wherein M1 is the average picture level of K-1 two field picture, and M2 is the average picture level of K-2 two field picture; Judge that the difference of M1 and M2 is whether in predetermined threshold range; If not, select the Image Adjusting function corresponding with (M1+M2)/2; If select the Image Adjusting function corresponding with M1.
Preferably, in said method, select the step of the Image Adjusting function corresponding with (M1+M2)/2 to comprise: to read serially the Image Adjusting function corresponding with (M1+M2)/2 from storer; Select the step of the Image Adjusting function corresponding with M1 to comprise: to read serially the Image Adjusting function corresponding with M1 from storer.
Preferably, in said method, utilize the Image Adjusting function that the contrast of current frame image is adjusted.
Preferably, in said method, the Image Adjusting function is the GAMMA curve.
The present invention has following beneficial effect:
1, in the present invention, select corresponding Image Adjusting function according to the average picture level of the multiple image before the storage current frame image, and then utilize the Image Adjusting function that current frame image is adjusted, do not need buffer memory current frame image data, thereby make image display device not need to be provided for the storer of buffer memory current frame image data, circuit cost is reduced.
2, in the present invention, by in display device, control chip being connected with first memory by serial ports, the pin that first memory is connected with control chip is reduced, the difficulty of PCB fabric swatch is reduced, thereby reduced the design cost of circuit.
Description of drawings
Accompanying drawing can provide further understanding of the invention, and is included the ingredient of book as an illustration, and it shows embodiments of the invention, and is used for together explaining principle of the present invention with instructions.Wherein:
Fig. 1 shows APL curve of the prior art and the corresponding schematic diagram of GAMMA curve;
Fig. 2 shows the schematic diagram of image display device of the prior art;
Fig. 3 shows display device schematic diagram according to an embodiment of the invention;
Fig. 4 shows the sequential chart of display device reading out data according to an embodiment of the invention;
Fig. 5 shows display packing process flow diagram according to an embodiment of the invention; And
Fig. 6 shows the schematic diagram according to average picture level selection Image Adjusting function according to a preferred embodiment of the present invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Fig. 3 shows image display device schematic diagram according to an embodiment of the invention, and image display device comprises: serial FLASH 301, at many GAMMA curves of the interior storage of serial FLASH 301; Control chip 302 is connected by serial ports with serial FLASH 301, thereby the pin that serial FLASH 301 is connected with control chip is reduced, and reduces the difficulty of PCB fabric swatch and the design cost of circuit.This image display device also comprises a DDR (Double Date Rate, Double Data Rate) storer 303, is connected to the output terminal of control chip 302, for the current frame image that receives and store after adjusting.
The average picture level of two two field pictures before control chip 302 storage current frame images, select an Image Adjusting function corresponding with average picture level according to the average picture level of two two field pictures before current frame image from serial FLASH 301, control chip 302 is adjusted current frame image according to this Image Adjusting function.
in the present embodiment, by utilizing control chip to calculate and storing the average picture level of the multiple image before current frame image, read the Image Adjusting function corresponding with average picture level from serial FLASH 301 according to average picture level, and according to this Image Adjusting function, current frame image is adjusted, utilize the average level of current frame image multiple image before that current frame image is processed, do not need buffer memory current frame image data, thereby make image display device not need to be provided for the storer of buffer memory current frame image data, circuit cost is reduced.
In the present embodiment, serial FLASH 301 is as the memory device of storage GAMMA curve, and control chip 302 reads GAMMA curve in serial FLASH 301 by serial ports, this is an example of the present embodiment, the present invention is not limited only to this, for example, can also be other memory devices as the memory device of storing the GAMMA curve, it carries out data transmission by parallel port and control chip 302, so that control chip 302 can read the GAMMA curve in this memory device.
Further, control chip 302 has storage unit, is used for storing the average picture level of above-mentioned current frame image multiple image before.Control chip 302 also has processing unit, is used for the average picture level of multiple image is compared, and selects the Image Adjusting function according to comparative result.
In the present embodiment, second memory 303 can be DDR, but this is a kind of example of the present invention, and second memory 303 can also be other forms of storer, for example, and SDR.Control chip 302 can be FPGA, but this is also a kind of example of the present invention, and control chip 302 can also be other forms of control chip, for example, and DSP, single-chip microcomputer etc.
Fig. 4 shows the sequential chart of display device reading out data according to a preferred embodiment of the present invention, in Fig. 4 when control chip 302 is connected with first memory 301 by serial ports, use in the present embodiment serial FLASH to be connected with control chip 302, when the read or write speed of serial FLASH was 60M, the data that need to read in real time were the time t of the APL data of single order
1For:
t
1=(bit wide * subfield)/60=(16 * 16)/60=4.27us
Read the time t that a GAMMA needs
2For:
t
2=(video 10bit) * 16 * 3/60=1024 * 16 * 3/60=819.2us.
Summation (the t of read data time
1+ t
2) can complete in the dynamic stage of video data.The initial time that is powering on, the data that the control chip internal RAM needs are all read from FLASH, after first_start uprises, during every field synchronization head, be that Vs_re is between high period, according to the APL numerical value of previous frame image, the APL data read in the RAM of control chip inside from FLASH corresponding address, and select a GAMMA curve with heel according to APL, utilize this GAMMA curve that the contrast of current frame image is adjusted.
Fig. 5 shows the process flow diagram of method for displaying image according to an embodiment of the invention, comprises the following steps:
S502 selects corresponding Image Adjusting function according to the average picture level of the multiple image before the storage current frame image;
Concrete, utilize the control chip 302 in Fig. 3 that the average picture level of the multiple image before current frame image is stored in its inner storer, and select corresponding Image Adjusting function according to the average picture level of storage, in the present embodiment, the average picture level of storing two two field pictures gets final product, the Image Adjusting function is the GAMMA curve, but this is a kind of example of the present embodiment, and the present invention is not limited only to this.
Concrete, select the step of corresponding Image Adjusting function to comprise according to the average picture level of the multiple image before the storage current frame image: the average picture level M1 and the M2 that store current K frame two two field pictures before, wherein M1 is the average picture level of K-1 two field picture, and M2 is the average picture level of K-2 two field picture; Judge that the difference of M1 and M2 is whether in predetermined threshold range; If not, select the Image Adjusting function corresponding with (M1+M2)/2; If select the Image Adjusting function corresponding with M1.
Concrete, select the step of the Image Adjusting function corresponding with (M1+M2)/2 to comprise: to read serially the Image Adjusting function corresponding with (M1+M2)/2 from storer; Select the step of the Image Adjusting function corresponding with M1 to comprise: to read serially the Image Adjusting function corresponding with M1 from storer.
S504 utilizes the Image Adjusting function that current frame image is adjusted.
Concrete, according to the GAMMA curve of selecting in step S502, current frame image is adjusted, for example adopt the GAMMA curve that the contrast of image is adjusted.The concrete grammar that uses the GAMMA curve that picture contrast is adjusted can adopt any method in correlation technique, just is not described in detail at this.
not very greatly in the situation that the APL that adds up between frame and frame changes difference, can select the GAMMA curve according to the average picture level (APL) of previous frame statistics, because adjacent GAMMA curve is all fine setting, the time of one frame does not affect the quality of image, can not cause too greatly flickering because of data variation yet, if the APL that adds up between frame and frame changes difference very greatly, the APL that calculates by previous frame selects the GAMMA curve, two GAMMA curve differences between frame and frame can be larger like this, easily can cause flickering to human eye, so at this moment need to select a suitable GAMMA curve, this section difference is progressively changed to normal value, the GAMMA curve of selecting during this is all close, it is not very large changing, human eye can the scent image flicker, make processing to the data of image in the situation that there is no the data buffer storage chip, also can select the GAMMA curve by APL, improve the display quality of image.
Fig. 6 shows the schematic diagram according to average picture level selection Image Adjusting function according to a preferred embodiment of the present invention.as shown in Figure 6, schematically illustrate according to average picture level (APL) at the present embodiment and select GAMMA curve flow process, during scope as the APL of the first two field picture statistics 1 to 10, be that APL value corresponding to current frame image in Fig. 6 is APL0, the second two field picture is processed, namely the present frame in Fig. 6 is processed, need to call in GAMMA curve 1, very large to 120 to 130 the scope of APL saltus step when the second frame statistics, be that APL value corresponding to current frame image in Fig. 6 is APL 128, the 3rd two field picture is processed, namely the next frame in Fig. 6 is processed, if select to call in GAMMA curve 5, because the APL value changes greatly, can make GAMMA curve 1 and GAMMA curve 5 at a distance of distant, human eye is easily felt the image shake of moment, the 3rd frame just can not be selected to call in GAMMA curve 5 and process, select the corresponding GAMMA curve of mean value of APL value and the APL value that the second frame is added up of the first frame statistics, namely select 3 pairs of the 3rd two field pictures of GAMMA curve to process, like this due to GAMMA curve 1 and GAMMA curve 3, close between GAMMA curve 3 and GAMMA curve 5, data variation is little, can not cause the flicker of image.
In the present embodiment, by selecting corresponding Image Adjusting function according to the average picture level of the multiple image before the storage current frame image; Utilize the Image Adjusting function that current frame image is adjusted, do not need buffer memory current frame image data, thereby make image display device not need to be provided for the storer of buffer memory current frame image data, circuit cost is reduced.
The above is only the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. an image display device, is characterized in that, comprising:
First memory is stored a plurality of Image Adjusting functions, and described a plurality of Image Adjusting functions correspond respectively to a plurality of average picture level scopes;
Control chip, be used for calculating and storing the average picture level of current frame image multiple image before, the input end of described control chip is connected to described first memory, be used for reading the Image Adjusting function corresponding with described average picture level according to described average picture level from described first memory, and according to this Image Adjusting function, described current frame image adjusted;
Second memory is connected to the output terminal of described control chip, is used for receiving and store the described current frame image after adjustment,
Wherein, described control chip also is used for storing average picture level M1 and the M2 of current K frame two two field pictures before, wherein M1 is the average picture level of K-1 two field picture, M2 is the average picture level of K-2 two field picture, whether the difference that judges M1 and M2 in predetermined threshold range, if not, selects the Image Adjusting function corresponding with (M1+M2)/2, if select the Image Adjusting function corresponding with M1.
2. image display device according to claim 1, is characterized in that, described control chip is connected with described first memory by serial ports or parallel port.
3. image display device according to claim 1, is characterized in that, described control chip has storage unit, is used for the average picture level of storage current frame image multiple image before.
4. image display device according to claim 1, is characterized in that, described second memory is DDR.
5. a method for displaying image, is characterized in that, comprises the following steps:
Select corresponding Image Adjusting function according to the average picture level of the multiple image before the storage current frame image;
Utilize described Image Adjusting function that current frame image is adjusted,
Wherein, select the step of corresponding Image Adjusting function to comprise according to the average picture level of the multiple image before the storage current frame image:
Store average picture level M1 and the M2 of current K frame two two field pictures before, wherein M1 is the average picture level of K-1 two field picture, and M2 is the average picture level of K-2 two field picture;
Judge that the difference of M1 and M2 is whether in predetermined threshold range;
If not, select the Image Adjusting function corresponding with (M1+M2)/2;
If select the Image Adjusting function corresponding with M1.
6. method according to claim 5, is characterized in that,
Select the step of the Image Adjusting function corresponding with (M1+M2)/2 to comprise:
Read serially the Image Adjusting function corresponding with (M1+M2)/2 from storer;
Select the step of the Image Adjusting function corresponding with M1 to comprise:
Read serially the Image Adjusting function corresponding with M1 from storer.
7. method according to claim 5, is characterized in that, utilizes described Image Adjusting function that the contrast of current frame image is adjusted.
8. method according to claim 5, is characterized in that, described Image Adjusting function is the GAMMA curve.
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| CN 200910258943 CN101739939B (en) | 2009-12-31 | 2009-12-31 | Device and method for displaying image |
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| CN 200910258943 CN101739939B (en) | 2009-12-31 | 2009-12-31 | Device and method for displaying image |
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| CN101739939B true CN101739939B (en) | 2013-06-05 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103152603A (en) * | 2013-04-09 | 2013-06-12 | 福建省产品质量检验研究院 | Video image APL (array processing language) analysis device and test method for flat television energy consumption test |
| CN107633808A (en) * | 2017-09-30 | 2018-01-26 | 深圳市华星光电半导体显示技术有限公司 | The brightness adjusting method and brightness regulating apparatus of display panel |
| US10417966B2 (en) | 2017-09-30 | 2019-09-17 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd | Brightness regulation method of a display panel and brightness regulation device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1577060A (en) * | 2003-06-30 | 2005-02-09 | 三洋电机株式会社 | Projection type video display |
| CN101101740A (en) * | 2006-07-06 | 2008-01-09 | 精工爱普生株式会社 | Image processing system, display device, program, and information recording medium |
| CN101123062A (en) * | 2006-08-09 | 2008-02-13 | 三星电子株式会社 | Image display apparatus and high quality image providing method thereof |
| WO2009038414A1 (en) * | 2007-09-20 | 2009-03-26 | Orion Pdp Co., Ltd. | Method for reverse-gamma compensation of plasma display panel |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1577060A (en) * | 2003-06-30 | 2005-02-09 | 三洋电机株式会社 | Projection type video display |
| CN101101740A (en) * | 2006-07-06 | 2008-01-09 | 精工爱普生株式会社 | Image processing system, display device, program, and information recording medium |
| CN101123062A (en) * | 2006-08-09 | 2008-02-13 | 三星电子株式会社 | Image display apparatus and high quality image providing method thereof |
| WO2009038414A1 (en) * | 2007-09-20 | 2009-03-26 | Orion Pdp Co., Ltd. | Method for reverse-gamma compensation of plasma display panel |
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