CN1828701A - Panel display device with white reference compensation device and its white reference compensation process - Google Patents
Panel display device with white reference compensation device and its white reference compensation process Download PDFInfo
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- CN1828701A CN1828701A CN 200510045963 CN200510045963A CN1828701A CN 1828701 A CN1828701 A CN 1828701A CN 200510045963 CN200510045963 CN 200510045963 CN 200510045963 A CN200510045963 A CN 200510045963A CN 1828701 A CN1828701 A CN 1828701A
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Abstract
To compensate the reference the oxidized white color variation of red, green and blue reference colors, the device comprises: an image generator to output a white color light source for the reference white color, an image scaling control board to regulate the scale of output image, feedback the voltage value of display module for comparison with light source voltage clue, and then compensate the reference white color; and a display module. This invention can ensure the plasma TV with instable chrominance.
Description
Affiliated technical field
The present invention relates to a kind of panel display apparatus, particularly be related to the reference white that the oxidation of compensation red (R), green (G), blue (B) three-color phosphor causes and change, have the panel display apparatus and the white reference compensation process thereof of reference white compensation system.
Background technology
Along with the development of Digital Television (TV) broadcasting, television receiver also shows (hereinafter to be referred as PDP) TV (TV), liquid crystal display television diversified direction accelerated developments such as (LCD TV) towards the full frame kinescope TV (TV) with high picture quality, projection TV (TV), plasma.
In the current various TVs that developing, what people attracted attention is that plasma shows TV (PDP TV).Plasma display panel (PDP) is between front glass and back side glass by the barrier sealing, enclose neon (Ne)+argon (Ar), neon (Ne)+xenon mixed gass such as (Xe), and between anode and negative electrode, insert voltage and launch a kind of display device of rainbow light as display light.
Plasma display panel is the gas discharge that produces utilization is enclosed gas and inserted voltage between two corresponding each other electrodes after, and the glow color of discharge generation is orange at this moment.Plasma display panel normally utilizes the ultraviolet deexcitation of discharge generation red, fluorophor green, blue three primary colours produce colored the demonstration, and its capacity of display is generally Unit 400 * 640 { unit (cell) or point (dot) }, and sharpness is 3 lines (line)/mm.
According to the formation of show electrode, common demonstration can be divided into the still image demonstration and module shows two kinds.Wherein, still image show be each section that is arranged as in-line electrode image connected/close display digit; And module shows it is discharge cell to be arranged on vertically constitute between (X) electrode group and horizontal (Y) electrode group, and the discharge of point of crossing in length and breadth connected/close shows various literal or image.
Plasma shows that TV (PDP TV) machine is different with TV (TV) machine that uses kinescope, it is the TV of glass substrate as screen, usually compare with existing TV (TV) machine and not only reduce thickness and weight, and can make 80 inches large-scale pictures of 40 ∽, also on wall or ceiling, be provided with easily.And, also can be similar to existing TV (TV) and equally use as desktop type, therefore have the feature of setting and freedom of movement.Simultaneously, because can not only the audiovisual satellite, CATV (cable television) (CATV) broadcasting, and can be by being connected to come repertoire with PC (PC), and support diversified multimedia function, therefore have the strong point of in family, enterprise, hospital, school, using as information equipment.
Below, with reference to accompanying drawing, the conventional art plasma display panel is described.
Fig. 1 is the schematic diagram of conventional art plasma display panel; Fig. 2 is general color TV (TV) color table diagrammatic sketch.
Plasma display panel as shown in Figure 1, after enclosing gas between two corresponding each other electrodes and inserting voltage, produce vacuum ultraviolet, and plasma display panel separately (PDP) fluorophor { red (R), green (G), blue (B) } of the ultraviolet deexcitation of utilizing discharge generation red (Red), green (Green), blue (Blue) three primary colours, and the light that each self-excitation is produced makes up as required.
Conventional art plasma display panel fluorophor { red (R), green (G), blue (B) } as shown in Figure 1, because { there is leakage in Vacuum ultraviolet:VUV} at the discharge on fluorophor surface and vacuum ultraviolet under the discharging condition, therefore along with the reasons such as oxidation of the loss fluorophor self of time, not only reduce brightness, and have problem luminous and that life characteristic reduces.
Because this plasma display panel characteristics of luminescence can cause the oxidation of fluorophor, and oxidation makes red (R), green (G), blue (B) three primary colours are inhomogeneous, the reference white of setting during therefore along with the loss product export of time (white balance) will produce distortion distortion, thereby colourity reproduction feature progressively changes.
That is, general color TV (TV) is normally set white with the discernible color distinction curve of bottom line { MPCD (Minimum Perceptible Color Difference curve) } benchmark as shown in Figure 2; Article on plasma shows TV (PDP TV) situation, and according to the uneven degree of oxidation of fluorophor, the image that reference white is biased toward the some colors in red (R), green (G), blue (B) three primary colours shows.Particularly the plasma that has both PC (PC) display function is shown TV (PDP TV) situation, with PC (PC) is the color that the basis is set on picture, because it is fast that its oxidizing process is carried out, the possibility that the reference white of setting when therefore having product export all the time changes.
Summary of the invention
The present invention proposes for the problem that solves the conventional art existence, its objective is provides a kind of according to the degree of oxidation that detects the fluorophor that uses in the flat-panel display device, to the reference white of flat-panel display device, the panel display apparatus with reference white compensation system and the white reference compensation process thereof that can periodically compensate.
The panel display apparatus that the present invention who develops for achieving the above object has the reference white compensation system is to be made of following part: for output becomes the pictcure generator that the white image light source of reference white is provided with; When the calibration of output image is regulated, the light source voltage value of flat display module output fed back with magnitude of voltage from the white image light source of pictcure generator output compare, and according to the image calibration control panel of comparative result for can standard of compensation white being provided with; The display module that is provided with for the image from the output of image calibration control panel is shown.
The image calibration control panel is to be made of following part: the red, green, blue three primary colours light of the white image that becomes primary colours with after the red, green, blue three primary colours light voltage addition separately of flat display module feedback, for detecting the error-detecting portion that error is provided with; The differentiator that is provided with for the error that compensates the error composition that error-detecting portion is detected; In the flat display module production process, being stored in the internal storage by the chromaticity coordinates that obtains corresponding to the reference white magnitude of voltage after the adjustment white level, and when comparing with magnitude of voltage from the light of differentiator output, gain is separately regulated and the microprocessor that is provided with to the red, green, blue three primary colours; The calibration portion that is provided with for output after the calibration of the red, green, blue three primary light source of exporting from microprocessor is regulated.
Display module has the optical detection device of the red, green, blue three primary colours that detect feedback light source magnitude of voltage; And the installation site of red, green, blue three primary colours optical detection device is the regional glass filter bottom beyond effective face of panel display apparatus.
The present invention who develops for achieving the above object has the white reference compensation process of the panel display apparatus of reference white compensation system and is made up of the following stage: if the user is input as the initialization command of standard of compensation white, then utilize image calibration control panel inner white image, the reference white of flat display module is carried out the demonstration stage; Each self-detector of red, green, blue three primary colours light by white image reads current red, green, blue three primary colours photochromism information, and the chrominance information that reads is carried out conversion stages with the specific voltage value; Error amount in the specific voltage value of red, green, blue three primary colours light is carried out detection-phase; Original chromaticity coordinate central value in error amount and the flat display module microprocessor is compared, and, the ratio of the red, green, blue three primary colours light of flat display module is carried out the adjusting stage for to make the ratio chromaticity coordinate and the reference white of original red, green, blue three primary colours light inequality.
The ratio of red, green, blue three primary colours light compared with the chrominance information of aberration (indigo plant), aberration (red) regulate.
Beneficial effect of the present invention is: the reference white changes in coordinates to the characteristic of the inhomogeneous oxidation of red, green, blue fluorophor causes, can compensate with electric signal, therefore show the end-of-life of TV to plasma till, can both reproduce with indeclinable colourity.
Description of drawings
Fig. 1 is the schematic diagram of conventional art plasma display panel.
Fig. 2 is general color TV (TV) color table diagrammatic sketch.
Fig. 3 is the panel display apparatus formation block diagram that the present invention has the reference white compensation system.
Fig. 4 to Fig. 5 is the optical detection device installation site key diagram of panel display apparatus of the present invention.
Fig. 6 is a white reference compensation process process flow diagram of the present invention.
Among the figure:
10: pictcure generator 20: the image calibration control panel
30: the plasma display panel module
Embodiment
Below, with reference to accompanying drawing, the panel display apparatus and the white reference compensation process thereof that the present invention are had the reference white compensation system describe.
Fig. 3 is the panel display apparatus formation block diagram that the present invention has the reference white compensation system.
The panel display apparatus that the present invention has a reference white compensation system is to be made of following part as shown in Figure 3: become the pictcure generator 10 that red (R), green (G) of the white image of reference white, blue (B) three primary light source are provided with for output; When the calibration of output image is regulated, red (R) of the output of plasma display panel module 30, green (G), blue (B) three primary light source (-) are fed back and compare separately from the white image red (R) of pictcure generator 10 outputs, green (G), blue (B) three primary light source (+), and according to the image calibration control panel (VideoScaling Control board) 20 of comparative result for can standard of compensation white being provided with; The plasma display panel module 30 that is provided with for the image from 20 outputs of image calibration control panel is shown.Here, Reference numeral 40 is the image of output from plasma display panel module 30.
Image calibration control panel 20 is to be made of following part: after red (R) of the white image that becomes primary colours, green (G), blue (B) three primary colours light (+) and red (R), green (G) that feed back from plasma display panel module 30, the voltage addition separately of blue (B) three primary colours light (-), for detecting the error-detecting portion 21 that error is provided with; The differentiator 22 that is provided with for the error that compensates the error composition that error-detecting portion 21 is detected; Show in TV (PDP TV) production process at plasma, the chromaticity coordinates that obtains by red (R) corresponding to reference white, green (G) after the adjustment white level, blue (B) magnitude of voltage is stored in the internal storage, and when comparing, red (R), green (G), the gain separately of blue (B) three primary colours are regulated and the microprocessor 23 that is provided with magnitude of voltage from the light of differentiator 22 output; For the calibration portion 24 that output after the calibration of red (R), green (G) of microprocessor 23 outputs, blue (B) three primary light source is regulated is provided with.
Promptly, among the present invention, show in TV (PDP TV) production process at plasma, after the adjustment end to reference white coloured light (White balance), in image calibration control panel 20, red (R), green (G), 8 (bit) signals of blue (B) three primary colours, be sent to plasma display panel module 30.At this moment, reference white coloured light (White) magnitude of voltage corresponding to this moment, after photodetector (photo-detector) by optical detection device obtains, the magnitude of voltage that obtains is transformed to chromaticity coordinate, and { for example, Electrically Erasable Read Only Memory (EEPROM) } stored in the internal storage of the microprocessor 23 of image calibration control panel 20.Certainly, according to circumstances also can form chromaticity coordinate in other storeies different with microprocessor 23.
At this moment, the reference white that stored chromaticity coordinate can be set when dispatching from the factory corresponding to factory promptly becomes the central value of plasma display panel chroma areas (Color-space).
The plasma that dispatches from the factory like this shows TV (PDP TV), can show (Display) to diversified image with PC (PC) display or TV (TV) machine.Since along with audiovisual time increase fluorophor is oxidized, therefore need be to RGB (RGB) light-emitting phosphor efficiency compensation (balance).The oxidation of fluorophor is produced after the product export product of reference white distortion distortion, turn back to factory again and adjust.
But in the present invention as shown in Figure 3, be the voltage of red (R), green (G) of output in the voltage of red (R), green (G) of feedback in the plasma display panel module 30, blue (B) three primary colours light (-) and the pictcure generator 10, blue (B) three primary colours light (+), in error-detecting portion 21, carry out in the addition, exporting, and the error amount of output is carried out outputing to after the differential microprocessor 23 in differentiator 22 corresponding to error amount of its difference.
That is, red (R) of pictcure generator 10 output reference whites, green (G), blue (B) three primary colours value are separately set with specific voltage value (specific constant).And in the photodetector in red (R), green (G) that in plasma display panel module 30, feed back, blue (B) zone, if carry out being input to after the conversion error-detecting portion 21 with the specific voltage value, then error-detecting portion 21 corresponding to red (R) separately, green (G) and blue (B) and or the magnitude of voltage of difference { e: error} exports; And handle outputs to microprocessor 23 with the proportional voltage of the differential value of input voltage in differentiator 22.
Fig. 4 to Fig. 5 is the optical detection device installation site key diagram of panel display apparatus of the present invention.
The optical detection device installation site of panel display apparatus of the present invention such as Fig. 4 are to shown in Figure 5, its position is arranged on effective fluorophor 100 zone in addition of panel display apparatus 120 usually, and ideal situation is mounted in glass filter 110 bottoms of virtual region (Dummy Region).That is, glass filter 110 is wave filters that the light of red (R), green (G), blue (B) three primary colours is optionally exported.The photodetector separately that red (R), green (G), blue (B) three primary colours only are set in the glass filter bottom of virtual region could detect the output of red (R), green (G), blue (B) three primary colours light, does not also allow user's eyes see simultaneously.
Fig. 6 is a white reference compensation process process flow diagram of the present invention.
White reference compensation process of the present invention as shown in Figure 6, if be the user's input initialization order (S100) of standard of compensation white, the white image (S110) of display image calibration control (Video Scaling Control) plate 20 inside then.
Then, whether the light ratio rate of red (R), green (G), blue (B) three primary colours has been carried out adjustment with setting value and judged (S120).At this moment, red (R) separately, green (G), blue (B) three primary colours photodetector read the chrominance information of current red (R), green (G), blue (B) three primary colours; And the current chroma information that in photodetector, reads, and carry out being input to after the conversion error-detecting portion with the specific voltage value.Error-detecting portion detects error amount and the error amount that detects is input to microprocessor among the specific voltage value of photodetector input.And microprocessor compares the central value of the error amount of error-detecting portion with original chromaticity coordinate, and for the light ratio rate that makes red originally (R), green (G), blue (B) three primary colours can become the value of setting, compensates with electric signal.
At this moment, the present invention the light ratio rate of red (R), green (G), blue (B) three primary colours and aberration (indigo plant) (Cb), aberration (red) (Cr) compares.
Promptly, if red (R), green (G), blue (B) three primary colours photodetector output level be set at green detector voltage Green_Sensor_Voltage}, blue detector voltage Blue_Sensor_Voltage}, red detector voltage Red_Sensor_Voltage}, then
Y=C11 * Green_Sensor_Voltage+C12 * Blue_Sensor_Voltage+C13 * Red_Sensor_Voltage; And
Cb=C21 * Green_Sensor_Voltage+C22 * Blue_Sensor_Voltage+C23 * Red_Sensor_Voltage; And
Cr＝C31×Green_Sensor_Voltage+C32×Blue_Sensor_Voltage+C33×Red_Sensor_Voltage。
Here, Y is a white brightness (luminance) of utilizing red (R), green (G), blue (B) three primary colours photodetector output level; And aberration Cb, Cr are for three kinds of parameters of red, green, blue (RGB) being reduced to two kinds and the virtual coordinates that is provided with.
Here, C11, C12, C13, C21, C22, C23, C31, C32, the constant of C33 for from experiment, obtaining.
By above-mentioned explanation, if worker of the same trade can have numerous variations in the scope that does not break away from the technology of the present invention thought.
Therefore, technical scope of the present invention is not to be limited by the content that above-mentioned exemplary embodiments illustrates, but claim decides.
Claims (6)
1, a kind of panel display apparatus with reference white compensation system is characterized in that being made of following part:
For output becomes the pictcure generator that the white image light source of reference white is provided with;
When the calibration of output image is regulated, the light source voltage value of flat display module output fed back with magnitude of voltage from the white image light source of pictcure generator output compare, and according to the image calibration control panel of comparative result for can standard of compensation white being provided with;
The display module that is provided with for the image from the output of image calibration control panel is shown.
2, the panel display apparatus with reference white compensation system according to claim 1, it is characterized in that described image calibration control panel is to be made of following part: the red, green, blue three primary colours light of the white image that becomes primary colours with after the red, green, blue three primary colours light voltage addition separately of flat display module feedback, for detecting the error-detecting portion that error is provided with; The differentiator that is provided with for the error that compensates the error composition that error-detecting portion is detected; In the flat display module production process, being stored in the internal storage by the chromaticity coordinates that obtains corresponding to the reference white magnitude of voltage after the adjustment white level, and when comparing with magnitude of voltage from the light of differentiator output, gain is separately regulated and the microprocessor that is provided with to the red, green, blue three primary colours; The calibration portion that is provided with for output after the calibration of the red, green, blue three primary light source of exporting from microprocessor is regulated.
3, the panel display apparatus with reference white compensation system according to claim 1 is characterized in that described display module has the optical detection device of the red, green, blue three primary colours that detect feedback light source magnitude of voltage.
4, the panel display apparatus with reference white compensation system according to claim 3, the installation site that it is characterized in that described red, green, blue three primary colours optical detection device are the regional glass filter bottoms beyond effective face of panel display apparatus.
5, a kind of white reference compensation process with panel display apparatus of reference white compensation system is characterized in that being made up of the following stage:
If the user is input as the initialization command of standard of compensation white, then utilize image calibration control panel inner white image, the reference white of flat display module is carried out the demonstration stage;
Each self-detector of red, green, blue three primary colours light by white image reads current red, green, blue three primary colours photochromism information, and the chrominance information that reads is carried out conversion stages with the specific voltage value;
Error amount in the specific voltage value of red, green, blue three primary colours light is carried out detection-phase;
Original chromaticity coordinate central value in error amount and the flat display module microprocessor is compared, and, the ratio of the red, green, blue three primary colours light of flat display module is carried out the adjusting stage for to make the ratio chromaticity coordinate and the reference white of original red, green, blue three primary colours light inequality.
6, the white reference compensation process with panel display apparatus of reference white compensation system according to claim 5, the ratio that it is characterized in that described red, green, blue three primary colours light are to compare with the chrominance information of aberration (indigo plant), aberration (red) to regulate.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI383370B (en) * | 2007-09-20 | 2013-01-21 | Chunghwa Picture Tubes Ltd | Chrominance compensation method and panel lightening method in a display apparatus |
| CN107016969A (en) * | 2016-01-28 | 2017-08-04 | 三星显示有限公司 | Display device and its driving method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH08336155A (en) * | 1995-06-09 | 1996-12-17 | Fujitsu General Ltd | Method for correcting white balance |
| JPH0981075A (en) * | 1995-09-08 | 1997-03-28 | Fujitsu General Ltd | Video display device |
| CN1070671C (en) * | 1997-03-10 | 2001-09-05 | 明碁电脑股份有限公司 | Device for compensating-contacting white level value of image detector and method thereof |
| JP3661168B2 (en) * | 1999-11-25 | 2005-06-15 | 松下電器産業株式会社 | Gradation correction apparatus, gradation correction method, and video display apparatus |
| CN100391247C (en) * | 2002-11-29 | 2008-05-28 | Tcl王牌电子(深圳)有限公司 | Picture tone adjusting method for picture display device |
| KR100490624B1 (en) * | 2003-02-10 | 2005-05-17 | 삼성에스디아이 주식회사 | Image display apparatus |
| JP4084262B2 (en) * | 2003-08-08 | 2008-04-30 | 三星エスディアイ株式会社 | Luminance correction circuit, luminance correction method, video display device, and video display method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI383370B (en) * | 2007-09-20 | 2013-01-21 | Chunghwa Picture Tubes Ltd | Chrominance compensation method and panel lightening method in a display apparatus |
| CN107016969A (en) * | 2016-01-28 | 2017-08-04 | 三星显示有限公司 | Display device and its driving method |
| CN107016969B (en) * | 2016-01-28 | 2021-03-09 | 三星显示有限公司 | Display device and driving method thereof |
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Owner name: LG ELECTRONICS (NANJING) PLASMA CO., LTD. Free format text: FORMER OWNER: LG ELECTRONICS (SHENYANG) CO., LTD. Effective date: 20070316 |
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Effective date of registration: 20070316 Address after: 210046 Hengtong Datong 77, Nanjing economic and Technological Development Zone, Jiangsu Applicant after: LG Electronics (Nanjing) Plasma Co., Ltd. Address before: 110179 No. 3540 hi tech Development Zone, Liaoning, Shenyang Applicant before: LG Electronic (Shenyang) Co., Ltd. |
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