CN110322823B - Display substrate, brightness detection method and device thereof, and display device - Google Patents
Display substrate, brightness detection method and device thereof, and display device Download PDFInfo
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Abstract
The invention provides a display substrate, a brightness detection method and a device thereof, and a display device, wherein the method comprises the following steps: driving M sub-pixels in the N sub-pixels to emit light for at least N times, and acquiring at least N brightness values detected by the photosensitive sensor in the at least N times of light emission, wherein the M sub-pixels emitting light for at least N times are different from each other and the N sub-pixels emit light for at least one time, and M is a positive integer smaller than N and larger than or equal to 2/3 xN; and calculating the light-emitting brightness value of each sub-pixel in the N sub-pixels based on the at least N brightness values. The invention provides a display substrate, a brightness detection method and device and a display device, which can improve the display effect of the display device.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display substrate, a brightness detection method and apparatus, and a display apparatus.
Background
In the pixel driving circuit, due to instability of the manufacturing process, there are differences in threshold voltage, mobility, driving voltage of the electroluminescent elements, and the like of the driving transistors among a plurality of pixels, and thus, driving currents of the electroluminescent elements are different, so that the light emitting luminance of the electroluminescent elements in each pixel unit is inconsistent, further, the luminance uniformity of the display screen is reduced, and afterimages such as regional spots, images, and the like are generated.
Therefore, it is necessary to add a photosensor in the display substrate to detect the luminance of the pixel, and to perform pixel compensation based on the actually displayed luminance, thereby improving the display effect of the display device. In the prior art, the signal-to-noise ratio of the photosensitive sensor in the process of detecting the brightness is low, so that the accuracy of pixel compensation based on the detected brightness is low, and the display effect of the display device is poor.
Disclosure of Invention
The embodiment of the invention provides a display substrate, a brightness detection method and a device thereof, and a display device, and aims to solve the problems that in the prior art, when a plurality of sub-pixels share one photosensitive sensor, the signal to noise ratio of a signal detected by the photosensitive sensor is low, the pixel compensation accuracy is further reduced, and the display effect of the display device is poor.
In order to solve the technical problems, the invention provides the following technical scheme:
in a first aspect, an embodiment of the present invention provides a display substrate, where the display substrate includes a plurality of sub-pixels arranged in an array, each N sub-pixel is a group, a photosensitive sensor is disposed at a boundary of N sub-pixels in each group of sub-pixels, overlapping regions exist between orthographic projections of the photosensitive sensor on a substrate of the display substrate and orthographic projections of the N sub-pixels on the substrate, and N is a positive integer greater than 2.
Furthermore, the N sub-pixels are sub-pixels continuously arranged in the same row; or,
the N sub-pixels are arranged in the same column continuously; or,
the N sub-pixels are arranged on two adjacent rows of sub-pixels, and the sub-pixels in the same row are continuously arranged; or,
the N sub-pixels are arranged in two adjacent columns, and the sub-pixels in the same column are continuously arranged.
In a second aspect, an embodiment of the present invention further provides a brightness detection method, where the method includes:
driving M sub-pixels in the N sub-pixels to emit light for at least N times, and acquiring at least N brightness values detected by the photosensitive sensor in the at least N times of light emission, wherein the M sub-pixels emitting light for at least N times are different from each other and the N sub-pixels emit light for at least one time, and M is a positive integer smaller than N and larger than or equal to 2/3 xN;
and calculating to obtain the light-emitting brightness value of each sub-pixel in the N sub-pixels based on the at least N brightness values.
Further, the N =4,4 sub-pixels include a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, and the M =3;
the step of driving M sub-pixels of the N sub-pixels to emit light for at least N times and obtaining at least N brightness values detected by the photosensor during the at least N times of light emission includes:
driving the second sub-pixel, the third sub-pixel and the fourth sub-pixel to emit light, and turning off the first sub-pixel to obtain a first brightness value detected by the photosensitive sensor;
driving the first sub-pixel, the third sub-pixel and the fourth sub-pixel to emit light, and turning off the second sub-pixel to obtain a second brightness value detected by the photosensitive sensor;
driving the first sub-pixel, the second sub-pixel and the fourth sub-pixel to emit light, and turning off the third sub-pixel to obtain a third brightness value detected by the photosensitive sensor;
and driving the first sub-pixel, the second sub-pixel and the third sub-pixel to emit light, and turning off the fourth sub-pixel to acquire a fourth brightness value detected by the photosensitive sensor.
Further, the step of obtaining the light emitting brightness of each of the N sub-pixels by calculation based on the at least N luminance values includes:
dividing a difference value obtained by subtracting 2 times of the first brightness value from the sum of the second brightness value, the third brightness value and the fourth brightness value by 3 to obtain a light-emitting brightness value of the first sub-pixel;
dividing a difference value obtained by subtracting 2 times of the second brightness value from the sum of the first brightness value, the third brightness value and the fourth brightness value by 3 to obtain a light-emitting brightness value of the second sub-pixel;
dividing a difference value obtained by subtracting 2 times of the third brightness value from the sum of the first brightness value, the second brightness value and the fourth brightness value by 3 to obtain a light-emitting brightness value of the third sub-pixel;
and dividing a difference value obtained by subtracting 2 times of the fourth brightness value from the sum of the first brightness value, the second brightness value and the third brightness value by 3 to obtain a light-emitting brightness value of the fourth sub-pixel.
In a third aspect, an embodiment of the present invention further provides a brightness detection apparatus, where the brightness detection apparatus includes:
the driving module is used for driving M sub-pixels in the N sub-pixels to emit light for at least N times and acquiring at least N brightness values obtained by the photosensitive sensor in the light emission of at least N times, wherein the M sub-pixels emitting light for at least N times are different from each other, the N sub-pixels all emit light for at least one time, and M is a positive integer smaller than N and larger than or equal to 2/3 xN;
and the calculating module is used for calculating and obtaining the light-emitting brightness value of each sub-pixel in the N sub-pixels based on the at least N brightness values.
Further, the N =4,4 sub-pixels include a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, and the M =3; the driving module includes:
the first driving unit is used for driving the second sub-pixel, the third sub-pixel and the fourth sub-pixel to emit light, the first sub-pixel is turned off, and a first brightness value detected by the photosensitive sensor is acquired;
the second driving unit is used for driving the first sub-pixel, the third sub-pixel and the fourth sub-pixel to emit light, the second sub-pixel is turned off, and a second brightness value detected by the photosensitive sensor is acquired;
the third driving unit is used for driving the first sub-pixel, the second sub-pixel and the fourth sub-pixel to emit light, the third sub-pixel is turned off, and a third brightness value detected by the photosensitive sensor is acquired;
and the fourth driving unit is used for driving the first sub-pixel, the second sub-pixel and the third sub-pixel to emit light, and the fourth sub-pixel is turned off to acquire a fourth brightness value detected by the photosensitive sensor.
Further, the N =4,4 sub-pixels include a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, and the M =3; the driving module includes:
the first driving unit is used for driving the second sub-pixel, the third sub-pixel and the fourth sub-pixel to emit light, the first sub-pixel is turned off, and a first brightness value detected by the photosensitive sensor is acquired;
the second driving unit is used for driving the first sub-pixel, the third sub-pixel and the fourth sub-pixel to emit light, the second sub-pixel is turned off, and a second brightness value detected by the photosensitive sensor is acquired;
the third driving unit is used for driving the first sub-pixel, the second sub-pixel and the fourth sub-pixel to emit light, turning off the third sub-pixel and acquiring a third brightness value detected by the photosensitive sensor;
and the fourth driving unit is used for driving the first sub-pixel, the second sub-pixel and the third sub-pixel to emit light, and the fourth sub-pixel is turned off to acquire a fourth brightness value detected by the photosensitive sensor.
In a fourth aspect, an embodiment of the present invention further provides a display device, including the brightness detection apparatus as described above.
In the technical scheme provided by the invention, M sub-pixels in N sub-pixels are driven to emit light for at least N times, the photosensitive sensor can detect the light emitted by the M sub-pixels each time, and the effective photosensitive area of the photosensitive sensor is more than or equal to 2/3 multiplied by N because M is a positive integer which is less than N and is more than or equal to 2/3 multiplied by N, so that the proportion of effective signal quantity is ensured, namely the signal-to-noise ratio of the photosensitive sensor is ensured, the accuracy of brightness detection is improved, the accuracy of pixel compensation of the display device based on the detected brightness is conveniently improved, and the display effect of the display device is further improved. Therefore, the technical scheme provided by the invention can improve the display effect of the display device.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a top view of a sub-pixel and a photosensor in a display substrate according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating light extraction from a sub-pixel in a display substrate according to an embodiment of the disclosure;
FIG. 3a is a schematic diagram illustrating a position of a sub-pixel and a photosensor in a display substrate according to an embodiment of the present invention;
FIG. 3b is a second schematic view illustrating positions of a sub-pixel and a photosensor in the display substrate according to an embodiment of the present invention;
FIG. 3c is a third schematic view illustrating positions of sub-pixels and photosensors in the display substrate according to the embodiment of the invention;
FIG. 3d is a fourth schematic view illustrating positions of sub-pixels and photosensors in the display substrate according to an embodiment of the present invention;
FIG. 3e is a fifth schematic view illustrating positions of sub-pixels and photosensors in the display substrate according to an embodiment of the invention;
FIG. 3f is a sixth schematic view illustrating positions of sub-pixels and photosensors in the display substrate according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating a brightness detection method according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a luminance detection apparatus according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a brightness detection apparatus according to another embodiment of the present invention;
fig. 7 is a schematic structural diagram of a brightness detection apparatus according to another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a display substrate which comprises a plurality of sub-pixels arranged in an array mode, wherein each N sub-pixel is in one group, a photosensitive sensor is arranged at the junction of the N sub-pixels in each group of sub-pixels, overlapping regions exist in the orthographic projection of the photosensitive sensor on a substrate of the display substrate and the orthographic projection of the N sub-pixels on the substrate, and N is a positive integer larger than 2.
As shown in fig. 1 and fig. 2, a portion of the photosensitive sensor 110 corresponding to the overlapping region is used for receiving light emitted by the sub-pixels 120, an orthogonal projection of the photosensitive sensor 110 on the substrate and an orthogonal projection of each sub-pixel 120 on the substrate are only partially overlapped, and light emitted by the sub-pixels 120 passes through a light emitting region outside the overlapping region, so that normal display of the display device is ensured.
The N sub-pixels share one photosensitive sensor, the number of the photosensitive sensors arranged in the display device can be reduced on the premise of ensuring the detection of the luminance of the sub-pixels, and the effect of reducing the cost of the display device is achieved.
It should be noted that the light emitted by each sub-pixel is detected by only one photosensitive sensor.
Furthermore, the N sub-pixels are sub-pixels continuously arranged in the same row; or,
the N sub-pixels are arranged in the same column continuously; or,
the N sub-pixels are arranged in two adjacent rows, and the sub-pixels in the same row are continuously arranged; or,
the N sub-pixels are arranged in two adjacent columns, and the sub-pixels in the same column are continuously arranged.
That is, the arrangement of the N sub-pixels that one photosensor is responsible for detecting may be various, for example: one photosensitive sensor is responsible for detecting 5 sub-pixels located in the same row, as shown in fig. 3a (the dotted line in the figure is the photosensitive sensor); or one photosensitive sensor is responsible for detecting 3 sub-pixels in the same column, as shown in fig. 3 b; it is also possible that one photosensor is responsible for detecting 7 sub-pixels located in two adjacent rows, as shown in fig. 3c or 3 d; it is also possible that one photosensor is responsible for detecting 4 sub-pixels located in two adjacent columns, as shown in fig. 3e or 3 f.
The N sub-pixels which are responsible for detection by the photosensitive sensor have various arrangement modes, the flexibility of the photosensitive sensor for detecting the luminance of the sub-pixels can be improved, and the arrangement mode suitable for the whole pixels can be selected according to actual needs (the position and the size of a non-display area in a special-shaped screen) under the condition that the display device adopts the special-shaped screen for displaying.
An embodiment of the present invention further provides a brightness detection method, applied to the display substrate described above, as shown in fig. 4, the method includes:
step 401: driving M sub-pixels in the N sub-pixels to emit light for at least N times, and acquiring at least N brightness values detected by the photosensitive sensor in the at least N times of light emission, wherein the M sub-pixels emitting light for at least N times are different from each other and the N sub-pixels emit light for at least one time, and M is a positive integer smaller than N and larger than or equal to 2/3 xN;
step 402: and calculating the light-emitting brightness value of each sub-pixel in the N sub-pixels based on the at least N brightness values.
In the embodiment of the invention, M sub-pixels in N sub-pixels are driven to emit light for at least N times, the photosensitive sensor can detect the light emitted by the M sub-pixels each time, and the effective photosensitive area of the photosensitive sensor is more than or equal to 2/3 multiplied by N because M is a positive integer which is less than N and more than or equal to 2/3 multiplied by N, so that the proportion of effective signal quantity is ensured, namely the signal-to-noise ratio of the photosensitive sensor is ensured, the accuracy of brightness detection is improved, the accuracy of pixel compensation of the display device based on the detected brightness is improved, and the display effect of the display device is further improved. Therefore, the technical scheme provided by the invention can improve the display effect of the display device.
Under the condition that one photosensitive sensor is responsible for detecting N sub-pixels, the total photosensitive area of the photosensitive sensor is divided into N sub-pixels by the photosensitive sensor, the smaller the number of luminous sub-pixels in the N sub-pixels is, the smaller the effective photosensitive area of the reflective sensor is, the smaller the detected brightness value is, the larger noise signals are received by the rest of photosensitive areas outside the effective photosensitive area, so that the signal-to-noise ratio is smaller, and the brightness accuracy detected by the photosensitive sensor is poorer. By limiting the number M of the sub-pixels emitting light each time to be a positive integer which is less than N and greater than or equal to 2/3 multiplied by N, the effective photosensitive area can be ensured to be greater than or equal to 2/3 of the total photosensitive area, so that the signal-to-noise ratio of the photosensitive sensor is improved, and the accurate detection of the luminous brightness of the M sub-pixels by the photosensitive sensor is realized.
In addition, when the sub-pixel emitting light among the N sub-pixels is used for displaying low gray scale, the luminance detected by the photosensor is low, and the photosensor also receives more noise signals. By limiting the number M of the sub-pixels emitting light each time to be a positive integer which is less than N and greater than or equal to 2/3 XN, the photosensitive brightness of the photosensitive sensor can be ensured when low gray scale is displayed, the signal-to-noise ratio of the photosensitive sensor is further improved, and the accurate detection of the luminous brightness of the M sub-pixels by the photosensitive sensor is realized.
The photosensor detects the luminance value of each emission of the M sub-pixels, which is the sum of the luminance values of the emission of the M sub-pixels. By combining at least N luminance values and M sub-pixels corresponding to each luminance value, a luminance value of light emission of each sub-pixel at the time of light emission can be calculated.
After the display device determines the light-emitting brightness value of each sub-pixel, the light-emitting brightness value can be used as the basis of pixel compensation to correspondingly compensate, and further the display brightness of each sub-pixel is adjusted, so that each pixel of the whole display device is displayed at proper brightness, and the display effect of the display device is improved. After pixel compensation, the total brightness can be fixed in a certain specific photosensitive interval, and photosensitive wave patterns are simply adjusted.
In an alternative embodiment, one photosensor is responsible for detecting 4 sub-pixels, namely a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel, and driving the 3 different sub-pixels to emit light four times;
the step of driving M sub-pixels of the N sub-pixels to emit light at least N times and obtaining at least N brightness values detected by the photosensor in the at least N times of emission includes:
driving the second sub-pixel, the third sub-pixel and the fourth sub-pixel to emit light, and turning off the first sub-pixel to obtain a first brightness value detected by the photosensitive sensor;
driving the first sub-pixel, the third sub-pixel and the fourth sub-pixel to emit light, and turning off the second sub-pixel to obtain a second brightness value detected by the photosensitive sensor;
driving the first sub-pixel, the second sub-pixel and the fourth sub-pixel to emit light, and turning off the third sub-pixel to obtain a third brightness value detected by the photosensitive sensor;
and driving the first sub-pixel, the second sub-pixel and the third sub-pixel to emit light, and turning off the fourth sub-pixel to obtain a fourth brightness value detected by the photosensitive sensor.
The first sub-pixel, the second sub-pixel, the third sub-pixel and the fourth sub-pixel may be 4 sub-pixels which are located in the same row and are arranged consecutively, or 4 sub-pixels which are located in the same column and are arranged consecutively, or four sub-pixels as shown in fig. 3e or 3 f.
After 4 times of light emission, the photosensitive sensor detects 4 brightness values, and then the brightness value of each sub-pixel can be calculated.
In an optional embodiment, the step of calculating, based on the at least N luminance values, a luminance brightness of each of the N sub-pixels includes:
dividing a difference value obtained by subtracting 2 times of the first brightness value from the sum of the second brightness value, the third brightness value and the fourth brightness value by 3 to obtain a light-emitting brightness value of the first sub-pixel;
dividing a difference value obtained by subtracting 2 times of the second brightness value from the sum of the first brightness value, the third brightness value and the fourth brightness value by 3 to obtain a light-emitting brightness value of the second sub-pixel;
dividing a difference value obtained by subtracting 2 times of the third brightness value from the sum of the first brightness value, the second brightness value and the fourth brightness value by 3 to obtain a light-emitting brightness value of the third sub-pixel;
and dividing a difference value obtained by subtracting 2 times of the fourth brightness value from the sum of the first brightness value, the second brightness value and the third brightness value by 3 to obtain a light-emitting brightness value of the fourth sub-pixel.
The sum of the second luminance value, the third luminance value, and the fourth luminance value includes 3 times the light emission luminance value of the first sub-pixel +2 times the light emission luminance value of the second sub-pixel +2 times the light emission luminance value of the third sub-pixel +2 times the light emission luminance value of the fourth sub-pixel. The light-emitting brightness value of the first sub-pixel is obtained by subtracting 2 times of the first brightness value (the light-emitting brightness value of the second sub-pixel + the light-emitting brightness value of the third sub-pixel + the light-emitting brightness value of the fourth sub-pixel), and then the light-emitting brightness value of the first sub-pixel is obtained by dividing 3 times of the light-emitting brightness value of the first sub-pixel by 3.
Similarly, the light emitting luminance values of the second sub-pixel, the third sub-pixel and the fourth sub-pixel can be obtained, and the details are not repeated here.
Of course, in another aspect of the present invention, after the luminance values of the two sub-pixels are obtained by the above method, the luminance values of the remaining one sub-pixel may be obtained by subtracting the luminance values of the two sub-pixels from the luminance values of the three sub-pixels including the two sub-pixels, for example: after the light emitting brightness values of the first sub-pixel and the second sub-pixel are obtained through the method, the light emitting brightness value of the fourth sub-pixel can be obtained by subtracting the light emitting brightness sum value of the first sub-pixel and the second sub-pixel from the third brightness value; and subtracting the luminance sum value of the first sub-pixel and the second sub-pixel from the fourth luminance value to obtain the luminance value of the third sub-pixel.
By the method, the brightness of each sub-pixel can be accurately calculated based on at least N brightness values under the condition of ensuring high signal-to-noise ratio, so that the display device can accurately compensate each sub-pixel, and the display effect of the display device is improved.
The above description is given only by taking N =4 and M =3 as an example. In other embodiments of the present invention, N may also be other values, such as 7, 10, or 20, etc., and in the case where N is 10, M may be 7, 8, or 9. The principle is the same as the above embodiments, and the description is omitted here.
An embodiment of the present invention further provides a luminance detecting apparatus, as shown in fig. 5, the luminance detecting apparatus includes:
a driving module 510, configured to drive M sub-pixels of the N sub-pixels to emit light for at least N times, and obtain at least N luminance values obtained by the light sensing sensor through detection in the at least N times of light emission, where the M sub-pixels emitting light for at least N times are different from each other and the N sub-pixels all emit light at least once, and M is a positive integer smaller than N and greater than or equal to 2/3 × N;
the calculating module 520 calculates a luminance value of each of the N sub-pixels based on the at least N luminance values.
Further, as shown in fig. 6, the N =4,4 sub-pixels include a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, and the M =3; the driving module 510 includes:
the first driving unit 511 is configured to drive the second sub-pixel, the third sub-pixel, and the fourth sub-pixel to emit light, and the first sub-pixel is turned off, so as to obtain a first brightness value detected by the light-sensitive sensor;
a second driving unit 512, configured to drive the first sub-pixel, the third sub-pixel, and the fourth sub-pixel to emit light, and turn off the second sub-pixel, so as to obtain a second brightness value detected by the light sensing sensor;
a third driving unit 513, configured to drive the first sub-pixel, the second sub-pixel, and the fourth sub-pixel to emit light, and turn off the third sub-pixel, so as to obtain a third brightness value detected by the light-sensing sensor;
a fourth driving unit 514, configured to drive the first sub-pixel, the second sub-pixel, and the third sub-pixel to emit light, and turn off the fourth sub-pixel, so as to obtain a fourth luminance value detected by the light-sensitive sensor.
Further, as shown in fig. 7, the calculating module 520 includes:
a first calculating unit 521, configured to divide a difference obtained by subtracting 2 times of the first luminance value from a sum of the second luminance value, the third luminance value, and the fourth luminance value by 3 to obtain a luminance value of the first sub-pixel;
a second calculating unit 522, configured to divide a difference obtained by subtracting 2 times of the second luminance value from a sum of the first luminance value, the third luminance value, and the fourth luminance value by 3 to obtain a luminance value of the second sub-pixel;
a third calculating unit 523, configured to divide a difference obtained by subtracting 2 times of the third luminance value from a sum of the first luminance value, the second luminance value, and the fourth luminance value by 3 to obtain a luminance value of the third sub-pixel;
a fourth calculating unit 524, configured to divide a difference obtained by subtracting 2 times of the fourth luminance value from a sum of the first luminance value, the second luminance value, and the third luminance value by 3, so as to obtain a luminance value of the fourth sub-pixel.
The brightness detection apparatus 500 of the embodiment of the present invention can implement each process implemented by the brightness detection apparatus in the method embodiment of fig. 4, and is not described herein again to avoid repetition.
The brightness detection device 500 of the embodiment of the invention can ensure the proportion of effective signal quantity, namely, the signal-to-noise ratio of the photosensitive sensor, improve the precision of brightness detection, and is convenient for improving the accuracy of pixel compensation of the display device based on the detected brightness, thereby improving the display effect of the display device.
The embodiment of the invention also provides a display device which comprises the brightness detection device. Display devices include, but are not limited to, displays, cell phones, tablets, televisions, wearable electronics, navigation display devices, and the like.
The embodiment of the present invention further provides a display device, which includes but is not limited to: radio frequency unit, network module, audio output unit, input unit, sensor, display unit, user input unit, interface unit, memory, processor, and power supply. It will be appreciated by those skilled in the art that the above-described display device is not limited in its construction and that the display device may include more or fewer of the elements described above, or some of the elements may be combined, or a different arrangement of elements may be used.
Wherein the processor is configured to: driving M sub-pixels in the N sub-pixels to emit light for at least N times, and acquiring at least N brightness values detected by the photosensitive sensor in the at least N times of light emission, wherein the M sub-pixels emitting light for at least N times are different from each other and the N sub-pixels emit light for at least one time, and M is a positive integer smaller than N and larger than or equal to 2/3 xN; and calculating the light-emitting brightness value of each sub-pixel in the N sub-pixels based on the at least N brightness values.
Optionally, the N =4,4 sub-pixels include a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel, and M =3; the step of the processor performing the driving of the M sub-pixels of the N sub-pixels to emit light at least N times and acquiring at least N brightness values detected by the light-sensitive sensor in the at least N times of light emission may include: driving the second sub-pixel, the third sub-pixel and the fourth sub-pixel to emit light, and turning off the first sub-pixel to obtain a first brightness value detected by the photosensitive sensor; driving the first sub-pixel, the third sub-pixel and the fourth sub-pixel to emit light, and turning off the second sub-pixel to obtain a second brightness value detected by the photosensitive sensor; driving the first sub-pixel, the second sub-pixel and the fourth sub-pixel to emit light, and turning off the third sub-pixel to obtain a third brightness value detected by the photosensitive sensor; and driving the first sub-pixel, the second sub-pixel and the third sub-pixel to emit light, and turning off the fourth sub-pixel to acquire a fourth brightness value detected by the photosensitive sensor.
Optionally, the step of calculating, by the processor, the luminance brightness of each of the N sub-pixels based on the at least N luminance values may include: dividing a difference value obtained by subtracting 2 times of the first brightness value from the sum of the second brightness value, the third brightness value and the fourth brightness value by 3 to obtain a light-emitting brightness value of the first sub-pixel; dividing a difference value obtained by subtracting 2 times of the second brightness value from the sum of the first brightness value, the third brightness value and the fourth brightness value by 3 to obtain a light-emitting brightness value of the second sub-pixel; dividing a difference value obtained by subtracting 2 times of the third brightness value from the sum of the first brightness value, the second brightness value and the fourth brightness value by 3 to obtain a light-emitting brightness value of the third sub-pixel; and dividing a difference value obtained by subtracting 2 times of the fourth brightness value from the sum of the first brightness value, the second brightness value and the third brightness value by 3 to obtain a light-emitting brightness value of the fourth sub-pixel.
The display device can implement the processes implemented by the brightness detection device in the foregoing embodiments, and in order to avoid repetition, the details are not repeated here.
The display device provided by the embodiment of the invention can ensure the proportion of effective signal quantity, namely ensure the signal-to-noise ratio of the photosensitive sensor, improve the accuracy of brightness detection, and is convenient for improving the accuracy of pixel compensation of the display device based on the detected brightness, thereby improving the display effect of the display device.
Preferably, an embodiment of the present invention further provides a display apparatus, which includes the processor, the memory, and a computer program stored in the memory and capable of running on the processor, where the computer program is executed by the processor to implement the processes of the embodiment of the brightness detection method, and can achieve the same technical effects, and in order to avoid repetition, details are not repeated here.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the foregoing brightness detection method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
Unless defined otherwise, technical or scientific terms used herein should have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, it can be "directly on" or "under" the other element or intervening elements may be present.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. The brightness detection method is characterized by being applied to a display substrate, wherein the display substrate comprises a plurality of sub-pixels arranged in an array, every N sub-pixels form a group, the junction of N sub-pixels in each group of sub-pixels is provided with a photosensitive sensor, the orthographic projection of the photosensitive sensor on a substrate of the display substrate and the orthographic projection of the N sub-pixels on the substrate have an overlapping area, and N is a positive integer greater than 2; the method comprises the following steps:
driving M sub-pixels of the N sub-pixels to emit light for at least N times, and acquiring at least N brightness values detected by the photosensitive sensor in the at least N times of light emission, wherein the M sub-pixels emitting light for at least N times are different from each other and all the N sub-pixels emit light for at least one time, and M is a positive integer smaller than N and larger than or equal to 2/3 XN;
and calculating the light-emitting brightness value of each sub-pixel in the N sub-pixels based on the at least N brightness values.
2. The method of claim 1,
the N sub-pixels are arranged on the same row continuously; or,
the N sub-pixels are arranged in the same row continuously; or,
the N sub-pixels are arranged in two adjacent rows, and the sub-pixels in the same row are continuously arranged; or,
the N sub-pixels are arranged on two adjacent columns of sub-pixels, and the sub-pixels in the same column are continuously arranged.
3. The method of claim 1, wherein the N =4,4 sub-pixels comprise a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, and wherein M =3;
the step of driving M sub-pixels of the N sub-pixels to emit light for at least N times and obtaining at least N brightness values detected by the photosensor during the at least N times of light emission includes:
driving the second sub-pixel, the third sub-pixel and the fourth sub-pixel to emit light, and turning off the first sub-pixel to obtain a first brightness value detected by the photosensitive sensor;
driving the first sub-pixel, the third sub-pixel and the fourth sub-pixel to emit light, and turning off the second sub-pixel to obtain a second brightness value detected by the photosensitive sensor;
driving the first sub-pixel, the second sub-pixel and the fourth sub-pixel to emit light, and turning off the third sub-pixel to obtain a third brightness value detected by the photosensitive sensor;
and driving the first sub-pixel, the second sub-pixel and the third sub-pixel to emit light, and turning off the fourth sub-pixel to acquire a fourth brightness value detected by the photosensitive sensor.
4. The method according to claim 3, wherein said step of calculating the luminance of each of said N sub-pixels based on said at least N luminance values comprises:
dividing a difference value obtained by subtracting 2 times of the first brightness value from the sum of the second brightness value, the third brightness value and the fourth brightness value by 3 to obtain a light-emitting brightness value of the first sub-pixel;
dividing a difference value obtained by subtracting 2 times of the second brightness value from the sum of the first brightness value, the third brightness value and the fourth brightness value by 3 to obtain a light-emitting brightness value of the second sub-pixel;
dividing a difference value obtained by subtracting 2 times of the third brightness value from the sum of the first brightness value, the second brightness value and the fourth brightness value by 3 to obtain a light-emitting brightness value of the third sub-pixel;
and dividing a difference value obtained by subtracting 2 times of the fourth brightness value from the sum of the first brightness value, the second brightness value and the third brightness value by 3 to obtain a light-emitting brightness value of the fourth sub-pixel.
5. A brightness detection device is characterized in that the brightness detection device is applied to a display substrate, the display substrate comprises a plurality of sub-pixels arranged in an array, every N sub-pixels form a group, the junction of N sub-pixels in each group of sub-pixels is provided with a photosensitive sensor, the orthographic projection of the photosensitive sensor on a substrate of the display substrate and the orthographic projection of the N sub-pixels on the substrate have an overlapping area, and N is a positive integer greater than 2; the brightness detection device includes:
the driving module is used for driving M sub-pixels in the N sub-pixels to emit light for at least N times and acquiring at least N brightness values detected by the photosensitive sensor in the at least N times of light emission, wherein the M sub-pixels emitting light for at least N times are different from each other, the N sub-pixels emit light for at least one time, and M is a positive integer smaller than N and larger than or equal to 2/3 XN;
and the calculating module is used for calculating and obtaining the light-emitting brightness value of each sub-pixel in the N sub-pixels based on the at least N brightness values.
6. The apparatus according to claim 5, wherein the N sub-pixels are sub-pixels arranged in a row; or,
the N sub-pixels are arranged in the same column continuously; or,
the N sub-pixels are arranged in two adjacent rows, and the sub-pixels in the same row are continuously arranged; or,
the N sub-pixels are arranged on two adjacent columns of sub-pixels, and the sub-pixels in the same column are continuously arranged.
7. The luminance detection device according to claim 5, wherein the N =4,4 sub-pixels include a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, and the M =3; the driving module includes:
the first driving unit is used for driving the second sub-pixel, the third sub-pixel and the fourth sub-pixel to emit light, the first sub-pixel is turned off, and a first brightness value detected by the photosensitive sensor is acquired;
the second driving unit is used for driving the first sub-pixel, the third sub-pixel and the fourth sub-pixel to emit light, the second sub-pixel is turned off, and a second brightness value detected by the photosensitive sensor is obtained;
the third driving unit is used for driving the first sub-pixel, the second sub-pixel and the fourth sub-pixel to emit light, the third sub-pixel is turned off, and a third brightness value detected by the photosensitive sensor is acquired;
and the fourth driving unit is used for driving the first sub-pixel, the second sub-pixel and the third sub-pixel to emit light, and the fourth sub-pixel is turned off to acquire a fourth brightness value detected by the photosensitive sensor.
8. The luminance detection apparatus according to claim 7, wherein the calculation module includes:
a first calculating unit, configured to divide a difference obtained by subtracting 2 times of the first luminance value from a sum of the second luminance value, the third luminance value, and the fourth luminance value by 3 to obtain a luminance value of the first sub-pixel;
a second calculating unit, configured to divide a difference obtained by subtracting 2 times of the second luminance value from a sum of the first luminance value, the third luminance value, and the fourth luminance value by 3 to obtain a luminance value of the second sub-pixel;
a third calculating unit, configured to divide a difference obtained by subtracting 2 times of the third luminance value from a sum of the first luminance value, the second luminance value, and the fourth luminance value by 3 to obtain a luminance value of the third sub-pixel;
and the fourth calculating unit is configured to divide a difference obtained by subtracting 2 times of the fourth luminance value from the sum of the first luminance value, the second luminance value, and the third luminance value by 3 to obtain a luminance value of the fourth sub-pixel.
9. A display device comprising a luminance detection device as claimed in any one of claims 5 to 8.
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| JP4904783B2 (en) * | 2005-03-24 | 2012-03-28 | ソニー株式会社 | Display device and display method |
| GB201022137D0 (en) * | 2010-12-31 | 2011-02-02 | Barco Nv | Display device and means to improve luminance uniformity |
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