CN108766373B - Detection circuit and liquid crystal display device - Google Patents
Detection circuit and liquid crystal display device Download PDFInfo
- Publication number
- CN108766373B CN108766373B CN201810430144.9A CN201810430144A CN108766373B CN 108766373 B CN108766373 B CN 108766373B CN 201810430144 A CN201810430144 A CN 201810430144A CN 108766373 B CN108766373 B CN 108766373B
- Authority
- CN
- China
- Prior art keywords
- sub
- pixel
- data signal
- switching element
- pixels
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 51
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 17
- 102100024348 Beta-adducin Human genes 0.000 claims description 14
- 101000689619 Homo sapiens Beta-adducin Proteins 0.000 claims description 14
- 102100034033 Alpha-adducin Human genes 0.000 claims description 10
- 101000799076 Homo sapiens Alpha-adducin Proteins 0.000 claims description 10
- 101000629598 Rattus norvegicus Sterol regulatory element-binding protein 1 Proteins 0.000 claims description 10
- 239000003086 colorant Substances 0.000 claims description 4
- 241001270131 Agaricus moelleri Species 0.000 abstract 1
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 9
- 230000005856 abnormality Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3614—Control of polarity reversal in general
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides a detection circuit for detecting a display panel, which comprises a plurality of first switch elements, a plurality of second switch elements and a plurality of third switch elements. The first data signal and the second data signal are converted in polarity once per frame, and two adjacent first sub-pixels or two adjacent second sub-pixels or two adjacent third sub-pixels respectively receive the first data signal and the second data signal with opposite polarities through the turned-on first switching element or second switching element or third switching element. The invention also provides a liquid crystal display device. The detection circuit and the liquid crystal display device of the invention enable the same sub-pixels on two adjacent pixel units to have opposite polarities, thereby inhibiting the flicker of gray scales and pure color pictures, more accurately finding the abnormity of the pixels on the display panel during detection and saving frames.
Description
Technical Field
The invention relates to the field of liquid crystal display, in particular to a detection circuit and a liquid crystal display device.
Background
With the development of liquid crystal display technology, the demand for display panels is increasing, and the competition of the liquid crystal panel industry is also increasing, so that panel manufacturers are required to have exquisite technology and excessively high yield.
However, in the detection process of the liquid crystal display device, if the polarities of two adjacent pixels on the display panel are the same, the liquid crystal display device will flicker a gray-scale picture and a pure-color picture, so that the quality of the display panel cannot be accurately detected. Fig. 1 is a waveform diagram of a first detection circuit in the prior art, and as shown in fig. 1, the detection circuit enables pixels on a display panel to sequentially receive corresponding data signals through a plurality of switching elements, three data signal lines and a control signal line, but in the same frame, the polarities of driving voltages of two adjacent same sub-pixels are substantially the same, so that the frame may flicker. Fig. 2 is a diagram of a second detection circuit and waveforms in the prior art, in order to solve the problem of image flicker appearing in fig. 1, three data signal lines are added to the detection circuit, so that the polarities of two adjacent sub-pixels are opposite, thereby achieving the purpose of suppressing gray scale and pure color image flicker. However, the technical scheme increases the area of the frame, and the invention provides a solution for saving the frame more.
Disclosure of Invention
In view of the above, the present invention is directed to a detection circuit and a liquid crystal display device, which can suppress the flicker of the gray-scale picture and the pure-color picture and save the frame.
The detection circuit is used for detecting a display panel, the display panel comprises a plurality of pixel units which are arranged in an array mode, each pixel unit comprises three sub-pixels with different colors, namely a first sub-pixel, a second sub-pixel and a third sub-pixel, and the detection circuit comprises a plurality of first switch elements, a plurality of second switch elements and a plurality of third switch elements. Each first switch element comprises a first control end, a first pass end and a second pass end, the first control end of each first switch element receives a first control signal, the first pass end of each first switch element is connected with the first sub-pixel, and the second pass ends of two adjacent first switch elements respectively receive a first data signal and a second data signal. A plurality of second switching elements, each second switching element including a second control terminal, a third path terminal, and a fourth path terminal; the second control end of each second switch element receives a second control signal, the third path end of each second switch element is connected with the second sub-pixel, and the fourth path ends of two adjacent second switch elements respectively receive the first data signal and the second data signal. A plurality of third switching elements, each third switching element including a third control terminal, a fifth path terminal, and a sixth path terminal; the third control end of each third switching element receives the second control signal, the fifth pass end of each third switching element is connected with the third sub-pixel, and the sixth pass ends of two adjacent third switching elements respectively receive the first data signal and the second data signal. The first data signal and the second data signal are changed in polarity once per frame, and two adjacent first sub-pixels, two adjacent second sub-pixels, or two adjacent third sub-pixels respectively receive the first data signal and the second data signal with opposite polarities through the turned-on first switching element, the turned-on second switching element, or the turned-on third switching element.
Preferably, the first switching element, the second switching element, and the second path end, the fourth path end, and the sixth path end of the third switching element, which are respectively correspondingly connected to the first sub-pixel, the second sub-pixel, and the third sub-pixel in one pixel unit, all receive the first data signal.
Preferably, two of the first switch element, the second switch element, and the second path end, the fourth path end, and the sixth path end of the third switch element, which are correspondingly connected to the first sub-pixel, the second sub-pixel, and the third sub-pixel in one of the pixel units, respectively, receive the first data signal, and the other one of the first switch element, the second switch element, and the third sub-pixel receives the second data signal.
Preferably, the first sub-pixel is a red sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a blue sub-pixel.
Preferably, each of the first switching elements, each of the second switching elements, and each of the third switching elements is an N-type TFT.
Preferably, the first sub-pixel or the two second sub-pixels or the two third sub-pixels adjacent to each other receive the first data signal and the second data signal with opposite polarities through the turned-on first switching element or the turned-on second switching element or the turned-on third switching element, respectively, simultaneously.
Preferably, the first control signal is always at a high level, and the second control signal is always at a high level.
Preferably, in one frame, the first control signal and the second control signal are high level sequentially.
Preferably, when the second control signal is always at a low level, the detection circuit may be configured to drive the display panel to display a pure color picture.
The invention also provides a liquid crystal display device which comprises the detection circuit.
The detection circuit and the liquid crystal display device drive the display panel through the detection circuit, so that the polarities of the same sub-pixels on the adjacent pixel units are opposite, the flicker of a gray-scale picture and a pure-color picture can be inhibited, the abnormity of the pixels on the display panel can be found more accurately during detection, and the frame is saved more.
In order to make the aforementioned and other objects, features and advantages of the invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a diagram of a first detection circuit and waveforms in the prior art.
Fig. 2 is a diagram of a second detection circuit and waveforms in the prior art.
FIG. 3 is a diagram of a detection circuit and waveforms according to an embodiment.
FIG. 4 is a diagram of a detection circuit and waveforms according to an embodiment.
FIG. 5 is a diagram of a detection circuit and waveforms according to an embodiment.
Detailed Description
To further illustrate the technical means and effects of the present invention for achieving the intended purpose, the following detailed description is given to specific embodiments, methods, steps, structures, features and effects of a detection circuit and a liquid crystal display device according to the present invention with reference to the accompanying drawings and preferred embodiments.
The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings. While the invention has been described in connection with specific embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.
First embodiment
Referring to fig. 3, fig. 3 is a diagram illustrating a detection circuit and waveforms according to an embodiment. In the drawings of this specification, R1, R2, R3, and the like denote respective first sub-pixels, G1, G2, G3, and the like denote respective second sub-pixels, and B1, B2, B3, and the like denote respective third sub-pixels.
As shown in fig. 3, the present embodiment provides a detection circuit 100 for detecting a display panel 200, the display panel 200 includes a plurality of pixel units arranged in an array, each pixel unit includes three sub-pixels with different colors, namely a first sub-pixel (R1, R2, R3, etc.), a second sub-pixel (G1, G2, G3, etc.), and a third sub-pixel (B1, B2, B3, etc.), and the detection circuit 100 includes a plurality of first switching elements T1, a plurality of second switching elements T2, and a plurality of third switching elements T3. Each of the first switching elements T1 includes a first control terminal, a first path terminal and a second path terminal, the first control terminal of each of the first switching elements T1 receives the first control signal ADD1, the first path terminal of each of the first switching elements T1 is connected to the first subpixel (R1, R2, R3, etc.), and the second path terminals of two adjacent first switching elements T1 receive the first data signal D1 and the second data signal D2, respectively. Each of the second switching elements T2 includes a second control terminal, a third path terminal, and a fourth path terminal; the second control terminal of each of the second switching elements T2 receives the second control signal ADD2, the third path terminal of each of the second switching elements T2 is connected to the second sub-pixel (G1, G2, G3, etc.), and the fourth path terminals of two adjacent second switching elements T2 receive the first data signal D1 and the second data signal D2, respectively. Each of the third switching elements T3 includes a third control terminal, a fifth path terminal, and a sixth path terminal; the third control terminal of each of the third switching elements T3 receives the second control signal ADD2, the fifth path terminal of each of the third switching elements T3 is connected to the third sub-pixel (B1, B2, B3, etc.), and the sixth path terminals of adjacent two of the third switching elements T3 receive the first data signal D1 and the second data signal D2, respectively. The first and second data signals D1 and D2 are inverted once per frame, and two adjacent first sub-pixels (e.g., R1 and R2) or two adjacent second sub-pixels (e.g., G1 and G2) or two adjacent third sub-pixels (e.g., B1 and B2) respectively receive the first and second data signals D1 and D2 respectively through the turned-on first switching element T1 or second switching element T2 or third switching element T3.
Specifically, the first control terminal of each of the first switching elements T1 receives the first control signal ADD1, and controls to turn on or off the first and second path terminals of the first switching element T1 according to the first control signal ADD 1. And a first path terminal of each first switching element T1 is connected to a first sub-pixel (R1, R2, R3, etc.), and second path terminals of two adjacent first switching elements T1 respectively receive the first data signal D1 and the second data signal D2, so that the first data signal D1 and the second data signal D2 can be respectively input to two adjacent first sub-pixels (e.g., R1 and R2) through the turned-on first switching element T1. As shown in fig. 3, the neighboring first sub-pixel R1 and the first sub-pixel R2, the first sub-pixel R1 may receive the first data signal D1 through the turned-on first switching element T1, and the first sub-pixel R2 may receive the second data signal D2 through the turned-on first switching element T1.
The second control terminal of each of the second switching elements T2 receives the second control signal ADD2, and controls to turn on or off the third path terminal and the fourth path terminal of the second switching element T2 according to the second control signal ADD 2. And the third path terminal of each second switching element T2 is connected to a second sub-pixel (G1, G2, G3, etc.), and the fourth path terminals of two adjacent second switching elements T2 receive the first data signal D1 and the second data signal D2, respectively, so that the first data signal D1 and the second data signal D2 can be input to two adjacent second sub-pixels (e.g., G1 and G2) through the turned-on second switching element T2, respectively. As shown in fig. 3, the neighboring second sub-pixel G1 and the second sub-pixel G2, the second sub-pixel G1 may receive the first data signal D1 through the turned-on second switching element T2, and the second sub-pixel G2 may receive the second data signal D2 through the turned-on second switching element T2.
The third control terminal of each of the third switching elements T3 receives the second control signal ADD2, and controls to turn on or off the fifth and sixth path terminals of the third switching element T3 according to the second control signal ADD 2. And the fifth path terminal of each third switching element T3 is connected to a third sub-pixel (B1, B2, B3, etc.), and the sixth path terminals of two adjacent third switching elements T3 receive the first data signal D1 and the second data signal D2, respectively, so that the first data signal D1 and the second data signal D2 can be input to two adjacent third sub-pixels (e.g., B1 and B2) through the turned-on third switching element T3, respectively. As shown in fig. 3, the neighboring third sub-pixel B1 and the third sub-pixel B2, the third sub-pixel B1 may receive the second data signal D2 through the turned-on third switching element T3, and the third sub-pixel B2 may receive the first data signal D1 through the turned-on third switching element T3.
Accordingly, the adjacent two first sub-pixels (e.g., R1 and R2) or the adjacent two second sub-pixels (e.g., G1 and G2) or the adjacent two third sub-pixels (e.g., B1 and B2) respectively receive the first data signal D1 and the second data signal D2 through the turned-on first switching element T1 or second switching element T2 or third switching element T3, respectively.
And the first data signal D1 and the second data signal D2 are inverted once per frame, and two adjacent first sub-pixels (e.g., R1 and R2) or two adjacent second sub-pixels (e.g., G1 and G2) or two adjacent third sub-pixels (e.g., B1 and B2) respectively receive the first data signal D1 and the second data signal D2 with opposite polarities through the turned-on first switching element T1 or second switching element T2 or third switching element T3, respectively, so that the first data signal D1 and the second data signal D2 received by the two same adjacent sub-pixels at the end of each frame are opposite in polarity. As the neighboring first subpixel R1 and first subpixel R2 in fig. 3, the first subpixel R1 receives the first data signal D1 of positive polarity, the first subpixel R2 receives the second data signal D2 of negative polarity, and so on. Therefore, the first data signal D1 and the second data signal D2 received by two adjacent same sub-pixels have opposite polarities, so that the flicker of a gray-scale picture and a pure-color picture can be suppressed, and the abnormality of the pixels on the display panel can be more accurately found during detection; compared with the prior art, only the first data signal D1 and the second data signal D2 need to be received, so that the number of corresponding data signal lines is reduced, and the frames are saved.
The first sub-pixels (R1, R2, R3, etc.) may be red sub-pixels, the second sub-pixels (G1, G2, G3, etc.) may be green sub-pixels, and the third sub-pixels (B1, B2, B3, etc.) may be blue sub-pixels in the present embodiment, but the present invention is not limited to this pixel correspondence. It is understood that in another embodiment, the first sub-pixel (R1, R2, R3, etc.) may be a green sub-pixel, the second sub-pixel (G1, G2, G3, etc.) may be a blue sub-pixel, the third sub-pixel (B1, B2, B3, etc.) may be a red sub-pixel, etc., and in another embodiment, the sub-pixels may be sub-pixels of other colors besides the red sub-pixel, the green sub-pixel, and the blue sub-pixel, all of which are within the scope of the present invention.
The first control signal ADD1 and the second control signal ADD2 in this embodiment are not limited to two signals, and the first control signal ADD1 and the second control signal ADD2 may be the same signal.
In one embodiment, the second, fourth and sixth path terminals of the first, second and third switching elements T1, T2, T3, respectively connected to the first sub-pixel (R1, R2, R3, etc.), the second sub-pixel (G1, G2, G3, etc.), and the third sub-pixel (B1, B2, B3, etc.) in one pixel unit receive the first data signal D1. And the second pass terminal of two adjacent first switching elements T1 or the fourth pass terminal of two adjacent second switching elements T2 or the sixth pass terminal of two adjacent third switching elements T3 respectively receive the first data signal D1 and the second data signal D2, the second pass terminal, the fourth pass terminal and the sixth pass terminal of the first switching element T1, the second switching element T2 and the third switching element T3 corresponding to another pixel unit adjacent to the pixel unit receive the second data signal D2. Namely, the polarities of the sub-pixels on the two adjacent pixel units are positive, negative and negative, the polarities of the same sub-pixel on the two adjacent pixel units are opposite, so that the flicker of a gray-scale picture and a pure-color picture can be inhibited, and the abnormality of the pixels on the display panel can be more accurately found during detection.
In one embodiment, two of the second, fourth, and sixth pass terminals of the first, second, and third switching elements T1, T2, T3, and T1, T2, B3 respectively, which are correspondingly connected to the first sub-pixel (R1, R2, R3, etc.), the second sub-pixel (G1, G2, G3, etc.), and the third sub-pixel (B1, B2, B3, etc.) in one pixel unit, receive the first data signal D1, and the other receive the second data signal D2. And the second path terminal of two adjacent first switching elements T1 or the fourth path terminal of two adjacent second switching elements T2 or the sixth path terminal of two adjacent third switching elements T3 respectively receive the first data signal D1 and the second data signal D2, two of the first switching element T1, the second switching element T2, and the second path terminal, the fourth path terminal, and the sixth path terminal of the third switching element T3 corresponding to the pixel unit adjacent to the pixel unit receive the second data signal D2, and the other one receives the first data signal D1. That is, the polarities of the sub-pixels on two adjacent pixel units are positive, negative and positive (as shown in fig. 3), or positive, negative and positive, the polarities of the same sub-pixels on two adjacent pixel units are opposite, so that the flicker of the gray-scale picture and the pure-color picture can be suppressed, and the abnormality of the pixels on the display panel can be more accurately found during detection.
In an embodiment, each of the first switching elements T1, each of the second switching elements T2, and each of the third switching elements T3 may be an N-type TFT. In other embodiments, each of the first switching element T1, each of the second switching element T2, and each of the third switching element T3 may be other types of transistors such as NMOS transistors and the like. The present embodiment is explained taking as an example that each of the first switching elements T1, each of the second switching elements T2, and each of the third switching elements T3 is an N-type TFT.
In an embodiment, two adjacent first sub-pixels (e.g., R1 and R2) or two adjacent second sub-pixels (e.g., G1 and G2) or two adjacent third sub-pixels (e.g., B1 and B2) respectively simultaneously receive the first data signal D1 and the second data signal D2 with opposite polarities through the turned-on first switching element T1 or the turned-on second switching element T2 or the turned-on third switching element T3 respectively, as shown in fig. 3, the adjacent first sub-pixel R1 and the first sub-pixel R2 can simultaneously receive the first data signal D1 and the second data signal D2 with opposite polarities through the turned-on first switching element T1 respectively, and therefore, the flicker of the gray scale picture and the solid color picture can be kept suppressed constantly.
In one implementation, the first control signal ADD1 is always high, and the second control signal ADD2 is always high. Two adjacent first sub-pixels (such as R1 and R2) or two adjacent second sub-pixels (such as G1 and G2) or two adjacent third sub-pixels (such as B1 and B2) respectively receive the first data signal D1 and the second data signal D2 with opposite polarities through the turned-on first switching element T1 or the turned-on second switching element T2 or the turned-on third switching element T3, respectively, so that the first data signal D1 and the second data signal D2 received by the two adjacent same sub-pixels at the end of each frame are opposite in polarity, thereby being capable of suppressing the flicker of the gray-scale picture and the pure color picture.
In one embodiment, the first control signal ADD1 and the second control signal ADD2 are sequentially high during one frame. FIG. 4 is a diagram of a detection circuit and waveforms according to an embodiment. As shown in fig. 4, the first control signal ADD1 and the second control signal ADD2 are sequentially at a high level, accordingly, the first switching element T1 is turned on first, the first sub-pixel (R1, R2, R3, etc.) receives the first data signal D1 and the second data signal D2, then the second switching element T2 and the third switching element T3 are turned on simultaneously, the second sub-pixel (G1, G2, G3, etc.) and the third sub-pixel (B1, B2, B3, etc.) receive the first data signal D1 and the second data signal D2 simultaneously, and the first data signal D1 and the second data signal D2 received by two adjacent same sub-pixels at the end of each frame are made to have opposite polarities, so that flickering of a gray scale picture and a pure color picture can be suppressed. It is understood that in another embodiment, the second control signal ADD2 and the first control signal ADD1 are sequentially high in one frame, which is also within the protection scope of the present invention.
In one embodiment, when the second control signal ADD2 is always at a low level, the detection circuit 100 can be used to drive the display panel 200 to display a pure color image. As shown in fig. 5, the first control signal ADD1 is always high, the second control signal ADD2 is always low, the first switching element T1 may be turned on, the second switching element T2 and the third switching element T3 may be turned off, and accordingly, only the first sub-pixel (R1, R2, R3, etc.) may receive the first data signal D1 and the second data signal D2, the second sub-pixel (G1, G2, G3, etc.) and the third sub-pixel (B1, B2, B3, etc.) may always receive the first data signal D1 and the second data signal D2, the display panel 200 displays only the color displayed by the first sub-pixel (R1, R2, R3, etc.), realizing the display of a pure color picture, while the first data signal D1 and the second data signal D2 received by two same adjacent subpixels at the end of each frame are opposite in polarity, therefore, the flicker of the pure color picture can be inhibited, and the abnormity of the corresponding sub-pixel on the display panel can be more accurately found during detection.
In the detection circuit 100 of the embodiment, the display panel 200 is driven by the detection circuit 100, so that the polarities of the same sub-pixels on two adjacent pixel units are opposite, and the flicker of a gray-scale picture and a pure-color picture can be suppressed, so that the abnormality of the pixels on the display panel can be more accurately found during detection; compared with the prior art, only the first data signal D1 and the second data signal D2 need to be received, so that the number of corresponding data signal lines is reduced, and the frames are saved.
Second embodiment
The present embodiment further provides a liquid crystal display device, which includes the above-mentioned detection circuit 100 and the display panel 200.
In the liquid crystal display device of the embodiment, the detection circuit 100 drives the display panel 200 to make the same sub-pixels on two adjacent pixel units have opposite polarities, so that the flicker of a gray-scale picture and a pure-color picture can be suppressed, the abnormality of the pixels on the display panel can be more accurately found during detection, and the frame is more saved.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A detection circuit (100) for detecting a display panel (200), wherein the display panel (200) includes a plurality of pixel units arranged in an array, each pixel unit includes three sub-pixels with different colors, namely a first sub-pixel, a second sub-pixel and a third sub-pixel, and the detection circuit (100) includes:
a plurality of first switching elements (T1), each first switching element (T1) including a first control terminal, a first path terminal and a second path terminal, the first control terminal of each first switching element (T1) receiving a first control signal (ADD1), the first path terminal of each first switching element (T1) being connected to the first sub-pixel, the second path terminals of two adjacent first switching elements (T1) receiving a first data signal (D1) and a second data signal (D2), respectively;
a plurality of second switching elements (T2), each second switching element (T2) including a second control terminal, a third path terminal, and a fourth path terminal; a second control terminal of each second switching element (T2) receives a second control signal (ADD2), a third path terminal of each second switching element (T2) is connected to the second sub-pixel, and fourth path terminals of two adjacent second switching elements (T2) receive the first data signal (D1) and the second data signal (D2), respectively;
a plurality of third switching elements (T3), each third switching element (T3) including a third control terminal, a fifth path terminal, and a sixth path terminal; a third control terminal of each of the third switching elements (T3) receives the second control signal (ADD2), fifth path terminals of the third switching elements (T3) are connected to the third sub-pixels, and sixth path terminals of adjacent two third switching elements (T3) receive the first data signal (D1) and the second data signal (D2), respectively;
the first data signal (D1) and the second data signal (D2) are inverted once per frame, and two adjacent first sub-pixels or two adjacent second sub-pixels or two adjacent third sub-pixels respectively receive the first data signal (D1) and the second data signal (D2) with opposite polarities through the turned-on first switching element (T1) or second switching element (T2) or third switching element (T3).
2. A detection circuit (100) as claimed in claim 1, wherein the first sub-pixel, the second sub-pixel and the third sub-pixel in one of the pixel units receive the first data signal (D1) via the second path terminal, the fourth path terminal and the sixth path terminal of the first switching element (T1), the second switching element (T2) and the third switching element (T3) respectively connected to the first sub-pixel, the second sub-pixel and the third sub-pixel.
3. A detection circuit (100) as claimed in claim 1, wherein the first sub-pixel, the second sub-pixel and the third sub-pixel in one of the pixel units receive the first data signal (D1) through two of a second path terminal, a fourth path terminal and a sixth path terminal of a first switching element (T1), a second switching element (T2) and a third switching element (T3) respectively connected to the first sub-pixel, the second sub-pixel and the third sub-pixel, respectively, and the other one receives the second data signal (D2).
4. A detection circuit (100) as claimed in claim 1, wherein the first sub-pixel is a red sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a blue sub-pixel.
5. A detection circuit (100) as claimed in claim 1, characterized in that each of the first switching elements (T1), each of the second switching elements (T2) and each of the third switching elements (T3) is an N-type TFT.
6. A detection circuit (100) as claimed in claim 1, characterized in that the first control signal is always high and the second control signal is always high.
7. A detection circuit (100) as claimed in claim 1, wherein the first control signal and the second control signal are high sequentially during a frame.
8. A detection circuit (100) as claimed in claim 1, wherein the detection circuit (100) is configured to drive the display panel (200) to display a pure color picture when the second control signal is always low.
9. A liquid crystal display device, characterized in that it comprises a detection circuit (100) according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810430144.9A CN108766373B (en) | 2018-05-08 | 2018-05-08 | Detection circuit and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810430144.9A CN108766373B (en) | 2018-05-08 | 2018-05-08 | Detection circuit and liquid crystal display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108766373A CN108766373A (en) | 2018-11-06 |
| CN108766373B true CN108766373B (en) | 2020-11-24 |
Family
ID=64010361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810430144.9A Active CN108766373B (en) | 2018-05-08 | 2018-05-08 | Detection circuit and liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108766373B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109285502B (en) * | 2018-11-14 | 2020-06-16 | 武汉华星光电半导体显示技术有限公司 | OLED display panel |
| CN109493770A (en) * | 2018-11-15 | 2019-03-19 | 昆山龙腾光电有限公司 | Display panel and its detection method |
| CN111474791A (en) * | 2020-05-14 | 2020-07-31 | 深圳市华星光电半导体显示技术有限公司 | Pixel structure, display panel with pixel structure and display device |
| CN112086079B (en) * | 2020-09-18 | 2021-08-03 | Tcl华星光电技术有限公司 | Display panel and driving method thereof |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001235725A (en) * | 2000-02-24 | 2001-08-31 | Victor Co Of Japan Ltd | Liquid crystal display device |
| CN101221330A (en) * | 2006-11-22 | 2008-07-16 | 卡西欧计算机株式会社 | Liquid crystal display device |
| JP2010191114A (en) * | 2009-02-17 | 2010-09-02 | Videocon Global Ltd | Tft array built-in self-inspection device and inspection method |
| CN101963709A (en) * | 2009-07-21 | 2011-02-02 | 乐金显示有限公司 | Chip on glass type LCD device and detection method of the same |
| CN102687188A (en) * | 2010-01-19 | 2012-09-19 | 夏普株式会社 | Display panel and inspection method thereof |
| CN103839503A (en) * | 2012-11-23 | 2014-06-04 | 乐金显示有限公司 | Display panel and method for testing display panel |
| CN104933979A (en) * | 2015-07-20 | 2015-09-23 | 京东方科技集团股份有限公司 | Detecting circuit, detecting method and displaying device |
| CN105243980A (en) * | 2015-10-21 | 2016-01-13 | 深超光电（深圳）有限公司 | Thin film transistor array substrate, display panel and solid color picture detection method |
| CN105335003A (en) * | 2015-10-10 | 2016-02-17 | 深圳市华星光电技术有限公司 | Touch control display panel and touch control circuit thereof |
| CN105676495A (en) * | 2016-04-14 | 2016-06-15 | 深圳市华星光电技术有限公司 | Detecting unit, array substrate, liquid crystal display device and detecting method |
| CN105913823A (en) * | 2016-06-23 | 2016-08-31 | 武汉华星光电技术有限公司 | High-resolution demultiplexer driving circuit |
| CN105913791A (en) * | 2016-06-24 | 2016-08-31 | 厦门天马微电子有限公司 | Display device, array substrate and driving method thereof |
| CN106782238A (en) * | 2016-12-20 | 2017-05-31 | 武汉华星光电技术有限公司 | Detection circuit, detection method and display panel |
| CN107315291A (en) * | 2017-07-19 | 2017-11-03 | 深圳市华星光电半导体显示技术有限公司 | A kind of GOA display panels and GOA display devices |
| CN107728395A (en) * | 2017-10-31 | 2018-02-23 | 京东方科技集团股份有限公司 | Array base palte, display device, data wire bad detection means and detection method |
-
2018
- 2018-05-08 CN CN201810430144.9A patent/CN108766373B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001235725A (en) * | 2000-02-24 | 2001-08-31 | Victor Co Of Japan Ltd | Liquid crystal display device |
| CN101221330A (en) * | 2006-11-22 | 2008-07-16 | 卡西欧计算机株式会社 | Liquid crystal display device |
| JP2010191114A (en) * | 2009-02-17 | 2010-09-02 | Videocon Global Ltd | Tft array built-in self-inspection device and inspection method |
| CN101963709A (en) * | 2009-07-21 | 2011-02-02 | 乐金显示有限公司 | Chip on glass type LCD device and detection method of the same |
| CN102687188A (en) * | 2010-01-19 | 2012-09-19 | 夏普株式会社 | Display panel and inspection method thereof |
| CN103839503A (en) * | 2012-11-23 | 2014-06-04 | 乐金显示有限公司 | Display panel and method for testing display panel |
| CN104933979A (en) * | 2015-07-20 | 2015-09-23 | 京东方科技集团股份有限公司 | Detecting circuit, detecting method and displaying device |
| CN105335003A (en) * | 2015-10-10 | 2016-02-17 | 深圳市华星光电技术有限公司 | Touch control display panel and touch control circuit thereof |
| CN105243980A (en) * | 2015-10-21 | 2016-01-13 | 深超光电（深圳）有限公司 | Thin film transistor array substrate, display panel and solid color picture detection method |
| CN105676495A (en) * | 2016-04-14 | 2016-06-15 | 深圳市华星光电技术有限公司 | Detecting unit, array substrate, liquid crystal display device and detecting method |
| CN105913823A (en) * | 2016-06-23 | 2016-08-31 | 武汉华星光电技术有限公司 | High-resolution demultiplexer driving circuit |
| CN105913791A (en) * | 2016-06-24 | 2016-08-31 | 厦门天马微电子有限公司 | Display device, array substrate and driving method thereof |
| CN106782238A (en) * | 2016-12-20 | 2017-05-31 | 武汉华星光电技术有限公司 | Detection circuit, detection method and display panel |
| CN107315291A (en) * | 2017-07-19 | 2017-11-03 | 深圳市华星光电半导体显示技术有限公司 | A kind of GOA display panels and GOA display devices |
| CN107728395A (en) * | 2017-10-31 | 2018-02-23 | 京东方科技集团股份有限公司 | Array base palte, display device, data wire bad detection means and detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108766373A (en) | 2018-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9898978B2 (en) | Liquid crystal panels and the driving circuits thereof | |
| US9934736B2 (en) | Liquid crystal display and method for driving the same | |
| CN108766373B (en) | Detection circuit and liquid crystal display device | |
| US7746335B2 (en) | Multi-switch half source driving display device and method for liquid crystal display panel using RGBW color filter | |
| US7903072B2 (en) | Electro-optical device, driving circuit, and electronic apparatus for decreasing frame size | |
| KR101127593B1 (en) | Liquid crystal display device | |
| CN108107634B (en) | Display panel driving method and display device | |
| US10535285B2 (en) | GOA display panel and GOA display apparatus | |
| US10192510B2 (en) | Source driving module generating two groups of gamma voltages and liquid crystal display device using same | |
| US20170053608A1 (en) | Array substrate, display panel and display apparatus containing the same, and method for driving the same | |
| US20080150862A1 (en) | Lcd device capable of reducing line flicker and horizontal crosstalk for rgbw subpixel arrangement | |
| KR101992910B1 (en) | Liquid crystal dispaly panel and inspecting system the same | |
| US20090231363A1 (en) | Data multiplexer architecture for realizing dot inversion mode for use in a liquid crystal display device and associated driving method | |
| US20160155400A1 (en) | Display apparatus | |
| US9905187B2 (en) | Method of driving display panel and display apparatus for performing the same | |
| CN108417184B (en) | Display device and gray scale compensation method of display panel | |
| CN110879500A (en) | Display substrate, driving method thereof, display panel and display device | |
| US20080231575A1 (en) | Liquid crystal panel and method for driving same | |
| US20060170642A1 (en) | Method and circuit for driving liquid crystal display | |
| JP2008233454A (en) | Electrooptical device, driving method, driving circuit, and electronic apparatus | |
| CN105489183A (en) | Pixel driving circuit used for liquid crystal panel | |
| US9721517B2 (en) | Display device | |
| US20080088615A1 (en) | Driving method for liquid crystal display using block cycle inversion | |
| KR101497407B1 (en) | driving method of liquid crystal display device | |
| US20030222836A1 (en) | Method and circuit for driving a liquid crystal display and liquid crystal display incorporating the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Applicant after: InfoVision Optoelectronics(Kunshan)Co.,Ltd. Address before: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Applicant before: INFOVISION OPTOELECTRONICS (KUNSHAN) Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |