CN108573665B - Display screen lighting parameter adjusting method and circuit and display screen testing equipment - Google Patents
Display screen lighting parameter adjusting method and circuit and display screen testing equipment Download PDFInfo
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Abstract
The invention provides a method and a circuit for adjusting lighting parameters of a display screen and display screen testing equipment, wherein the method comprises the following steps: and under the current display screen configuration parameters, detecting whether the current sub-pixel array is normal when the display screen displays the test picture, if the current sub-pixel array is normal, judging whether the display screen is in a black screen state currently, and if the display screen is not in the black screen state, adjusting the current display screen configuration parameters. According to the method, in the process of screen dotting test, the display parameters of the display screen are automatically adjusted according to the display condition of the sub-pixel array of the test picture under the current display screen configuration parameters, so that the screen dotting test speed is increased, the screen dotting test time is shortened, and the development test and production efficiency of the display screen are greatly improved.
Description
Technical Field
The invention relates to the technical field of display screens, in particular to a method and a circuit for adjusting lighting parameters of a display screen and display screen testing equipment.
Background
The point screen test is needed in the development test and the production stage of the display screen. With the development of display screen technology, the grade of the display screen is higher and higher, the difficulty of lighting the display screen is increased, and particularly the difficulty of adjusting the lighting effect is higher.
Because many parameters are related to the lighting of the display screen, and the parameters are related to each other, the process of adjusting the configuration parameters of the display screen is longer, the speed of the point screen test is slower, and the time consumption is long during the point screen test, so that the development test and the production efficiency of the display screen are reduced.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
The invention provides a method for adjusting lighting parameters of a display screen, which is used for automatically adjusting the configuration parameters of the display screen according to the display condition of a sub-pixel array of a test picture under the current configuration parameters of the display screen in the process of the point screen test, thereby improving the point screen test speed, shortening the point screen test time and greatly improving the development test and the production efficiency of the display screen.
An embodiment of one aspect of the present invention provides a method, including:
detecting whether the current sub-pixel array is normal or not when the display screen displays a test picture under the current display screen configuration parameters;
if not, judging whether the display screen is in a black screen state at present;
and if the display screen is not in a black screen state currently, adjusting the current configuration parameters of the display screen.
As a possible implementation manner of an embodiment of an aspect of the present invention, the adjusting current configuration parameters of the display screen includes:
determining the current configuration parameter type of the error display screen corresponding to the current sub-pixel array according to the mapping relation between the sub-pixel array and the configuration parameter type of the error display screen;
and adjusting the current configuration parameters of the display screen according to the type of the current configuration parameters of the wrong display screen.
As a possible implementation manner of an embodiment of an aspect of the present invention, the adjusting current configuration parameters of the display screen includes:
adjusting the configuration parameters of each display screen one by one according to the value ranges respectively corresponding to the configuration parameters of each display screen;
and after the configuration parameters of the display screen are adjusted, the detected sub-pixel array of the display screen is normal.
As a possible implementation manner of an embodiment of an aspect of the present invention, detecting whether a current sub-pixel array is normal when a display screen displays a test screen includes:
determining a target sub-pixel array according to the test picture;
and detecting whether the current sub-pixel array of the display screen is matched with the target sub-pixel array.
As a possible implementation manner of the embodiment of the one aspect of the present invention, after determining whether the display screen is currently in the black screen state, the method further includes:
if the display screen is in a black screen state at present, judging whether the current brightness value of the display screen is zero or not;
and if the current brightness value of the display screen is zero, outputting a backlight abnormal prompt.
As a possible implementation manner of the embodiment of the one aspect of the present invention, after determining whether the display screen is currently in the black screen state, the method further includes:
if the display screen is in a black screen state at present, judging whether the current brightness value is in a first range;
if the current brightness value is in the first range, judging whether the current driving current value of the display screen is in a second range;
if the current driving current value of the display screen is in a second range, outputting a driving line abnormity prompt;
and if the current driving current value of the display screen is not in the second range, outputting a display screen fault or lighting equipment fault prompt.
As a possible implementation manner of the embodiment of the one aspect of the present invention, before the determining whether the current driving current value of the display screen is within the second range, the method further includes:
and determining the second range according to the size of the current display screen.
As a possible implementation manner in an embodiment of an aspect of the present invention, before determining the second range according to the size of the current display screen, the method further includes:
controlling the image sensor to move along a first direction and a second direction respectively, and acquiring the moving distances corresponding to the image sensor in the first direction and the second direction respectively when the edges of the image sensor and the display screen are flush;
and determining the size of the display screen according to the size of the image sensor and the movement distance of the image sensor in the first direction and the second direction respectively.
As a possible implementation manner of an embodiment of an aspect of the present invention, after determining the size of the display screen, the method further includes:
determining the resolution and the screen aspect ratio corresponding to the display screen according to the size of the display screen;
and determining the effective level, the width of the synchronous head, Htotal and Vtotal corresponding to the display screen according to the resolution.
According to the method for adjusting the lighting parameters of the display screen, whether the current sub-pixel array is normal or not when the display screen displays the test picture is detected under the current configuration parameters of the display screen, if the current sub-pixel array is normal, whether the display screen is in a black screen state or not is judged, and if the display screen is not in the black screen state, the current configuration parameters of the display screen are adjusted. In the embodiment, in the screen dotting test process, the display screen configuration parameters are automatically adjusted according to the display condition of the sub-pixel array of the test picture under the current display screen configuration parameters, so that the screen dotting test speed is increased, the screen dotting test time is shortened, and the development test and production efficiency of the display screen are greatly improved.
In another aspect, an embodiment of the present invention provides a circuit for adjusting lighting parameters of a display screen, including: an image sensor and a controller;
the image sensor is used for detecting the current sub-pixel array of the display screen;
the input end of the controller is connected with the output end of the image sensor, the output end of the controller is connected with the display screen and used for driving the display screen to display a test picture, and current display screen configuration parameters are adjusted when it is determined that the current sub-pixel array detected by the image sensor is abnormal and the display screen is not in a black screen state currently.
As a possible implementation manner of another embodiment of the present invention, the display panel lighting parameter adjusting and lighting circuit further includes: and the Hall sensor is used for detecting the current at the output end of the controller.
The display screen lighting parameter adjusting circuit comprises an image sensor and a controller, wherein the input end of the controller is connected with the output end of the image sensor, the current sub-pixel array of the display screen is detected through the image sensor, the controller drives the display screen to display a test picture, and when the current sub-pixel array detected by the image sensor is abnormal and the display screen is not in a black screen state currently, current display screen configuration parameters are adjusted. Therefore, in the process of the dot screen test, the configuration parameters of the display screen are automatically adjusted according to the display condition of the sub-pixel array of the test picture under the current configuration parameters of the display screen, and a hardware basis is provided.
The embodiment of the invention provides a display screen test device, and the embodiment of the invention provides a display screen lighting parameter adjusting circuit and a memory;
wherein the memory has stored therein a computer program;
the method for adjusting the lighting parameter of the display screen according to the embodiment of the above aspect is implemented when the controller in the circuit for adjusting the lighting parameter of the display screen calls and executes the computer program stored in the memory.
In another aspect, the present invention provides a non-transitory computer-readable storage medium, where instructions in the storage medium are executed by a processor to implement the method for adjusting lighting parameters of a display screen according to the above embodiment.
In another embodiment of the present invention, a computer-readable storage medium is provided, where the storage medium stores a computer program, and when the computer program is executed by a processor, the computer program implements the method for adjusting the lighting parameter of the display screen according to the embodiment of the above aspect.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flow chart illustrating a method for adjusting lighting parameters of a display screen according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a method for adjusting current configuration parameters of a display screen according to an embodiment of the present invention;
fig. 3 is a schematic flowchart of another method for adjusting current configuration parameters of a display screen according to an embodiment of the present invention;
fig. 4 is a schematic flowchart of another method for adjusting lighting parameters of a display panel according to an embodiment of the present invention;
fig. 5 is a schematic flowchart illustrating a lighting parameter adjustment method for a display panel according to another embodiment of the present invention;
fig. 6 is a schematic diagram of a hardware circuit of a display screen lighting machine according to an embodiment of the present invention;
fig. 7 is a schematic flowchart illustrating a lighting parameter adjustment method for a display screen according to another embodiment of the present invention;
FIG. 8 is a schematic diagram of an image sensor moving on a display screen according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a lighting parameter adjusting circuit of a display panel according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a display screen testing apparatus according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following describes a display screen lighting parameter adjustment method, a circuit and a display screen test device according to an embodiment of the present invention with reference to the drawings.
The embodiments of the invention provide a method for adjusting lighting parameters of a display screen, aiming at the problems that when the display screen is subjected to the point screen test at present, the process of adjusting the configuration parameters of the display screen is long, the point screen test speed is slow, and the time consumption is long, so that the development test and the production efficiency of the display screen are reduced.
According to the method for adjusting the lighting parameters of the display screen, provided by the embodiment of the invention, in the process of the point screen test, the configuration parameters of the display screen are automatically adjusted according to the display condition of the sub-pixel array of the test picture under the current configuration parameters of the display screen, so that the point screen test speed is increased, the point screen test time is shortened, and the development test and production efficiency of the display screen are greatly improved.
Fig. 1 is a schematic flow chart illustrating a method for adjusting lighting parameters of a display screen according to an embodiment of the present invention.
As shown in fig. 1, the method for adjusting the lighting parameters of the display panel includes:
Since the signal type of the display screen is related to the hardware interface, the signal type of the display screen can be determined before the dot screen test is performed, so as to determine the hardware interface according to the signal type.
Wherein, the signal types may include Low-Voltage Differential Signaling (LVDS), Mobile Industry Processor Interface (MIPI), Embedded Display Interface (EDP), and so on,
in this embodiment, when performing the dot screen test, display screen configuration parameters of the display screen, such as parameters of a screen scanning direction, a resolution, a screen aspect ratio, and the like, may be set first, the current sub-pixel array is detected by the image sensor, and the display screen is driven to display a preset test picture, so as to determine whether the current sub-pixel array is normal.
In order to improve the accuracy of the dot screen test, a picture with rich colors can be selected as a test picture, for example, a landscape picture with rich colors is selected as the test picture.
In the field of images, color images are composed of a number of dots, also called pixels. Each pixel can typically exhibit a number of different colors, which are composed of three sub-pixels, red, green and blue. Each pixel on the display screen is combined by red, green and blue with different brightness levels to finally form different color points. Therefore, when judging whether the current sub-pixel array is normal or not, the judgment can be carried out according to the target sub-pixel array corresponding to the test picture.
Specifically, the gray scale corresponding to each sub-pixel in the target sub-pixel array corresponding to the test picture is compared with the gray scale corresponding to each sub-pixel in the current sub-pixel array of the display screen one by one, and whether the current sub-pixel array is normal or not can be determined. For example, in the target sub-pixel array and the current sub-pixel array of the display screen, the gray scale difference value of each sub-pixel point is within a preset range, and the current sub-pixel array of the display screen can be considered to be matched with the target sub-pixel array, that is, the current sub-pixel array of the display screen is considered to be normal; otherwise, the current sub-pixel array of the display screen may be considered as abnormal.
And 102, if the current sub-pixel array is abnormal, judging whether the display screen is in a black screen state currently.
In order to eliminate the defect that the current sub-pixel array is abnormal due to the black screen, when the current sub-pixel array of the display screen is abnormal, whether the display screen is in the black screen state is judged at first.
For example, whether the display screen is in a black screen state can be determined by checking whether the connection between the display screen and the power line is normal. If the connection between the display screen and the power line is abnormal, the current display screen can be determined to be in a black screen state. If the connection between the display screen and the power line is normal, whether the display screen is in a black screen state can also be determined by checking hardware.
And 103, if the display screen is not in a black screen state currently, adjusting the current configuration parameters of the display screen.
When the display screen is determined not to be in the black screen state currently, it can be determined that the current sub-pixel array of the display screen is abnormal, is not caused by the black screen, and may be caused by improper setting of the configuration parameters of the display screen. At this time, the current configuration parameters of the display screen are automatically adjusted.
Because the display screen has a plurality of configuration parameters, and the value of each display screen configuration parameter is one or more than one, so the display screen configuration parameters have a plurality of combination modes, and for a display screen, only one combination mode is correct, namely, when the display is only displayed under the combination, the display condition of the sub-pixel array is normal. In practical use, whether the current sub-pixel array is normal or not under each display screen configuration parameter combination can be verified one by one.
In the embodiment, the current configuration parameters of the display screen are automatically adjusted according to the display condition of the current sub-pixel array of the display screen, so that the adjustment time of the configuration parameters of the display screen is shortened, the dot screen testing efficiency is improved, and the development testing and production efficiency is greatly improved.
On the basis of the foregoing embodiment, as a possible implementation manner for adjusting the current configuration parameters of the display screen in step 103, the sub-pixel array corresponding to the current configuration parameters of the display screen may be compared with the sub-pixel array corresponding to the configuration parameter type of the error display screen to determine the configuration parameter type of the error display screen. Fig. 2 is a schematic flowchart of a method for adjusting current configuration parameters of a display screen according to an embodiment of the present invention.
As shown in fig. 2, the method for adjusting the current configuration parameters of the display screen includes:
In practice, for each display screen, there is only one correct value for each display screen configuration parameter. Then, the error display screen configuration parameter type here is used to indicate the error combination type of the display screen configuration parameters. If the sub-pixel array corresponding to the configuration parameter type of the error display screen is predetermined, the configuration parameter type of the error display screen corresponding to the current abnormal sub-pixel array can be determined, and then the configuration parameters of the display screen are adjusted.
In this embodiment, for the test picture, it may be pre-recorded that the sub-pixel array of the display screen is when the configuration parameter of the display screen is wrong, so that the mapping relationship between the sub-pixel array and the configuration parameter type of the wrong display screen may be established according to the obtained sub-pixel array corresponding to the configuration parameter type of the wrong display screen.
The types of the configuration parameters of the error display screen comprise: configuration parameter errors of only one display screen, configuration parameter errors of any two display screens and configuration parameter errors of any three display screensIndividual display screen configuration parameters are wrong, … …, all display screen configuration parameters are wrong. If there are n display screen configuration parameters, each of which has two values, then for one display screen, the type of wrong display screen configuration parameter is classified
And (4) seed preparation.
And when the current sub-pixel array is abnormal, determining the configuration parameter type of the error display screen corresponding to the current sub-pixel array according to the mapping relation between the sub-pixel array and the configuration parameter type of the error display screen. Specifically, the current sub-pixel array is compared with the sub-pixel array corresponding to the wrong display screen configuration parameter type. If the current sub-pixel array is the same as the sub-pixel array corresponding to a certain wrong display screen configuration parameter type, the wrong display screen configuration parameter type is the current wrong display screen configuration parameter type corresponding to the current sub-pixel array.
In this embodiment, through the mapping relationship between the sub-pixel array and the type of the configuration parameter of the error display screen, the type of the error combination of the configuration parameter of the display screen can be directly determined according to the current pixel array, and the time for determining the configuration parameter of the error display screen is reduced.
After the current configuration parameter type of the wrong display screen is determined, the current configuration parameter of the display screen can be adjusted according to the wrong value of the configuration parameter of the display screen in the configuration parameter type of the wrong display screen.
For example, the current configuration parameter type of the wrong display screen is that the byte number value of 8 bits is wrong, and the values of the rest display screen configuration parameters are correct. If the byte number value is three 6 bits, 8 bits and 10 bits, the correct value of the byte number under the current combination can be determined to be 6 bits or 10 bits, at this time, the byte number value can be adjusted to be 6 bits, and the values of the configuration parameters of the rest display screens are unchanged. If the sub-pixel array is normal, the correct value of the number of bytes is 6 bits, so that the correct combination type of the configuration parameters of the display screen can be determined. If the sub-pixel array is abnormal, the correct value of the byte number is 10 bits, the byte number value is adjusted to 10 bits, and the values of the configuration parameters of the rest of the display screens are unchanged, so that the normal sub-pixel array can be obtained.
In this embodiment, through the mapping relationship between the sub-pixel array and the wrong display screen configuration parameter type, the wrong combination type of the display screen configuration parameters can be directly determined according to the current pixel array, so that the display screen configuration parameters can be quickly adjusted, correct display screen configuration parameters can be found, and the dot screen testing speed is increased.
As another possible implementation, all combination types of display screen configuration parameters may also be traversed until the sub-pixel array is normal. Fig. 3 is a flowchart illustrating another method for adjusting current configuration parameters of a display screen according to an embodiment of the present invention.
As shown in fig. 3, the method for adjusting the current configuration parameters of the display screen includes:
and 301, adjusting the configuration parameters of the display screens one by one according to the value ranges respectively corresponding to the configuration parameters of the display screens.
In practice, the display screen configuration parameters can be divided into four categories: basic display screen configuration parameters, fixed display screen configuration parameters, important display screen configuration parameters and secondary display screen configuration parameters.
Wherein, basic display screen configuration parameters include: screen aspect ratio, resolution, both of which may be determined by the size of the display screen.
The fixed display screen configuration parameters include: the display screen configuration parameters are in one-to-one correspondence with the resolution ratio and do not need to be set, so the display screen configuration parameters are called as fixed display screen configuration parameters. Wherein Htotal refers to the total number of pixels in the horizontal direction in each frame of image signal, and Vtotal refers to the total number of pixels in the vertical direction in each frame of image signal.
Important display screen configuration parameters include: image Data formats (two, JEIDA and VESA), byte number (three: 6bit, 8bit and 10bit), Data Enable (DE) effective level (two, 0 and 1, determined by the used timing control chip (Tcon IC)).
Wherein JEIDA is a standard specified by Japan Electronics Industry Development Association (JEIDA for short); VESA is a standard designated by the Video Electronics Standards Association (VESA).
The secondary display screen configuration parameters include: single/double port, exchange of A/B port, Most Significant Bit (MSB) for short), Least Significant Bit (LSB for short), red-blue parity property.
In this embodiment, since the basic display screen configuration parameters can be directly determined, the fixed display screen configuration parameters correspond to the resolution, and the secondary display screen configuration parameters need to be modified less, in the actual adjustment process, the important display screen configuration parameters can be adjusted one by one according to the value range corresponding to the important display screen configuration parameters.
Because the TI mode has two values, the byte number has three values, and the DE effective level has two values, the combined type of the configuration parameters of the display screen has 2 × 3 × 2 ═ 12 types. Then, the display screen configuration parameters may be adjusted according to the combination type of the display screen configuration parameters.
Furthermore, after the configuration parameters of the important display screen are adjusted, when the sub-pixel array is still abnormal, the configuration parameters of the important display screen and the configuration parameters of the secondary display screen can be combined and adjusted one by one. Since there are 12 combination types of the important display configuration parameters and 16 combination types of the secondary display configuration parameters, there are 12 × 16 — 192 combination types.
Of course, after the basic display screen configuration parameters and the fixed display screen configuration parameters are determined, the important display screen configuration parameters and the secondary display screen configuration parameters can be directly combined to adjust the display screen configuration parameters one by one.
In this embodiment, the display screen configuration parameters are adjusted one by one according to the value range of each display screen configuration parameter, and the correct value of the display screen configuration parameters is determined in an enumeration manner, so that the problem of missing the combination of the display screen configuration parameters can be avoided.
And step 302, after the configuration parameters of the display screen are adjusted, detecting that the sub-pixel array of the display screen is normal.
In this embodiment, after the configuration parameters of the display screen are adjusted each time, whether the detected sub-pixel array of the display screen is normal is determined. When detecting that the sub-pixel array of the display screen is normal, namely the display screen is lightened, the correct value of the configuration parameter of the display screen can be determined.
In this embodiment, the value of the display screen configuration parameter corresponding to the sub-pixel array in the normal state is found in an enumeration manner, so that the display screen configuration parameter can be orderly adjusted, and the value of the corresponding display screen configuration parameter in the normal state of the sub-pixel array is quickly determined, thereby shortening the adjustment time of the display screen configuration parameter and improving the dot screen test efficiency.
On the basis of the above embodiment, in order to avoid display abnormality caused by backlight abnormality of the display screen, after determining that the display screen is currently in a black screen state, it may be determined whether the current brightness value of the display screen is zero. Fig. 4 is a flowchart illustrating another method for adjusting lighting parameters of a display panel according to an embodiment of the present invention.
As shown in fig. 4, the method for adjusting lighting parameters of a display panel, based on the method shown in fig. 1, further includes, after the step 102:
and 104, if the display screen is in a black screen state currently, judging whether the current brightness value of the display screen is zero or not.
When the display screen is in a black screen state, the current brightness value of the display screen can be acquired, and whether the brightness value is zero or not is judged so as to determine whether the current abnormal sub-pixel array is caused by backlight abnormity or not.
And 105, outputting a backlight abnormal prompt if the current brightness value of the display screen is zero.
If the current brightness value of the display screen is zero, outputting a backlight abnormity prompt so that a tester can check the reason of backlight abnormity and improve the screen dot test efficiency.
In this embodiment, when the display screen is in a black screen state, whether the backlight of the display screen is normal is determined according to the brightness value of the display screen, so as to avoid abnormal backlight and abnormal display caused, thereby improving the efficiency of the dot screen test.
Since the display screen is in a black screen state, and may be caused by a low brightness of the display screen, a first range may be set, and when the brightness value of the display screen is within the first range, it is determined that the low brightness is included. In this embodiment, after the display screen is in the black screen state, whether the brightness value of the display screen is in the first range may also be determined. Fig. 5 is a flowchart illustrating a lighting parameter adjustment method for a display panel according to another embodiment of the present invention.
As shown in fig. 5, after the step 102, the method for adjusting the lighting parameters of the display panel further includes:
and step 106, if the display screen is in a black screen state currently, judging whether the current brightness value is in a first range.
In this embodiment, the first range is set in advance. When the display screen is in a black screen state currently, the brightness value of the display screen is obtained, and the brightness value is compared with the upper limit value and the lower limit value of the first range to determine whether the brightness value is in the first range.
In this embodiment, when the display screen is in the black screen state, whether the brightness value of the display screen is within the first range is determined to determine whether the black screen state is caused by low brightness.
And step 107, if the current brightness value is in the first range, judging whether the current driving current value of the display screen is in the second range.
Since the display screen is at low brightness, it may be caused by too much or too little output drive line current connected to the display screen. In order to avoid the abnormality of the output driving lines, in this embodiment, a hall sensor may be disposed on each output driving line of the output terminal to detect the current value output to the display screen, that is, to detect the current driving current value of the display screen.
Assuming that the second range is 0< x < a, or x > B, where x is the current driving current value of the display screen detected by the hall sensor, a and B may be set according to actual needs. And when the brightness value of the display screen is in a first range, comparing the current value of the current drive of the display screen with A and B to judge whether the current value of the current drive of the display screen is in a second range. If the current driving current value of the display screen is smaller than A or larger than B, the current driving current value of the display screen can be considered to be in a second range. Otherwise, the current driving current value of the display screen is not in the second range.
Fig. 6 is a schematic diagram of a hardware circuit of a display screen lighting machine according to an embodiment of the present invention. Fig. 6 illustrates a lighting hardware circuit of a 21.5-inch capacitive screen.
As shown in fig. 6, the hardware circuit has an EDP output terminal, an MIPI output terminal, an 8lane V-by-one output terminal, a 16lane V-by-one output terminal, and an LVDS output terminal, that is, the hardware circuit shown in fig. 6 supports output signal formats such as LVDS, V-by-one, MIPI, and EDP. Among them, V-by-one is a signal standard introduced by Saien electronics, Japan. Where 8lane and 16lane refer to the output channels.
The Field-Programmable Gate Array (FPGA) in fig. 6 is responsible for generating video image signals and determining whether to adjust configuration parameters of the display screen. The FPGA can directly output LVDS signals through the LVDS output terminal.
A charge-coupled device (CCD) image sensor may transmit the detected image to the FPGA.
The 21.5-inch capacitive screen is an interface interacting with a user, and can support the input function of part of display screen configuration parameters, such as the vertical scanning direction of the display screen, and give related prompt information to the user, such as prompt information for confirming the input display screen setting parameters. The 21.5-inch capacitive screen can be connected with an RK3288 (development board) through a USB interface, and the RK3288 is responsible for transmitting display screen configuration parameters input by a user through the 21.5-inch capacitive screen to the FPGA, and simultaneously converting video image signals generated by the FPGA into MIPI and EDP formats so as to support the display screen with medium and small size.
The FPGA and the RK3288 can be connected through a Universal Asynchronous Receiver/Transmitter (UART for short). The FPGA can also be connected with EP9142 through a High Definition Multimedia Interface (HDMI for short), EP9142 is connected with TC358840XBG through the HDMI, and TC358840XBG transmits MIPI format signals to RK 3288. Among them, EP9142 and TC358840 xgg are models of chips.
EP9142 is connected to MSD6a828EV via HDMI, and outputs video image signals to the MSD6a828EV chip. The MSD6A828EV can convert the video image signal generated by the FPGA into a V-by-one format for output. MSD6a828EV can read data from EMMC and DDR3 (third generation double data rate synchronous dynamic random access memory) and write data to EMMC and DDR 3. The EMMC is an embedded memory standard specification established by the MMC society.
The MSD6A828EV can output a video image signal to the processor MST6M60FV, and MST6M60FV outputs a signal in V-by-one format through a 16lane V-by-one output terminal. In addition, an FPGA can be connected to a gigabit port, and the FPGA can read and write data from and to NAND FLASH (one type of FLASH memory) and DDR 3.
In this embodiment, a hall sensor may be installed on the output driving line between RK3288 and the 21.5 inch capacitive screen to detect the current driving current value of the display screen. It is understood that when a signal is output through other terminals, such as an EDP output terminal, a MIPI output terminal, etc., a hall sensor may also be mounted on the output driving line for detecting a current value on the output driving line.
In this embodiment, when the brightness value of the display screen is within the first range, it is further determined whether the current driving current value of the display screen is within the second range, so as to avoid abnormal display caused by abnormal output driving line.
And step 108, outputting a drive line abnormity prompt if the current drive current value of the display screen is in a second range.
In this embodiment, when the current driving current value of the display screen detected by the hall sensor is within the second range, it is described that the luminance of the display screen is low due to the influence of the current on the output driving line, and the abnormal prompting of the driving line can be output to prompt a user to output the abnormal driving line, so that the user can check the output driving line, and the abnormal output driving line is avoided, which leads to abnormal display, and thus the efficiency of the dot screen test can be improved.
And step 109, if the current value of the current drive of the display screen is not in the second range, outputting a display screen fault or lighting equipment fault prompt.
When the current driving current value of the display screen detected by the hall sensor is not in the second range, the display screen is in a black screen state, which is not caused by the output of the driving wire, and possibly the display screen or the lighting equipment has a fault, so that a display screen fault or lighting equipment fault prompt can be output, a user can check the display screen or the lighting equipment according to the prompt, the display screen fault or the lighting equipment fault is avoided, abnormal display is caused, and the rate of the lighting test is improved.
According to the method for adjusting the lighting parameter of the display screen, when the display screen is in a black screen state, whether display abnormity is caused by low brightness is determined by judging whether the brightness value is in the first range, and if the brightness value is in the first range, whether the display abnormity is caused by the abnormity of the output drive line or the fault of the display screen or the fault of the lighting machine is further determined by judging whether the current value on the output drive line is in the second range, so that the root cause of the display abnormity is found, and the efficiency of the lighting test can be improved.
In practical use, because the sizes of the display screens are different, when the display screens normally display, the current values detected on the output driving lines are different, so that the second range is different, before the current driving current value of the display screens is judged to be in the second range, the second range can be determined through the sizes of the display screens, and the sizes of the display screens can be obtained through the image sensor.
Fig. 7 is a flowchart illustrating a lighting parameter adjustment method for a display screen according to another embodiment of the present invention. As shown in fig. 7, the method for adjusting the lighting parameters of the display screen further includes:
step 401, controlling the image sensor to move along the first direction and the second direction respectively, and obtaining the moving distances corresponding to the image sensor in the first direction and the second direction respectively when the edges of the image sensor and the display screen are flush.
In this embodiment, the initial position of the image sensor may be set at one of four corners of the display screen, wherein the detection area of the image sensor may be 16 × 16 sub-pixels.
Since the size of the display screen is usually expressed by the diagonal size of the display screen, which is related to the lateral size and the longitudinal size of the display screen, the lateral size and the longitudinal size of the display screen can be obtained by controlling the image sensor to move along the lateral direction and the longitudinal direction of the display screen, and the diagonal size is calculated based on the lateral size and the longitudinal size.
Specifically, the image sensor can be controlled to move along a first direction and a second direction from one corner of the display screen, and when the edges of the image sensor and the display screen are level, the image sensor can be controlled to move along the first direction and the second direction respectively.
The first direction may be a direction from left to right or a direction from right to left along a transverse direction of the display screen, and the second direction may be a direction from top to bottom or a direction from bottom to top along a longitudinal direction of the display screen. Of course, the first direction may also be from top to bottom or from bottom to top along the longitudinal direction of the display screen, and the second direction may be from left to right or from right to left along the transverse direction of the display screen.
Fig. 8 is a schematic diagram illustrating movement of an image sensor on a display screen according to an embodiment of the present invention. As shown in fig. 8, the image sensor can move from the lower left corner to the lower right corner of the display screen along the first direction, and the movement distance l corresponding to the first direction of the image sensor is obtained. After the image sensor moves to the lower right corner, the image sensor can be controlled to move to the upper right corner along the second direction, and the moving distance h corresponding to the second direction of the image sensor is obtained.
Hypothetical image transferThe sensor has a dimension of m × n, and as shown in fig. 8, the first direction is a lateral direction, the second direction is a longitudinal direction, the moving distance in the first direction is l, and the moving distance in the second direction is h. Then, the horizontal size of the display screen is l + m, the vertical size of the display screen is h + n, and the diagonal size of the display screen is
In this embodiment, the size of the display screen can be accurately measured by controlling the movement of the image sensor.
After determining the size of the display screen, the second range may be determined based on the size of the display screen. As an example, the corresponding relationship between the size of the display screen and the second range may be established in advance, and after the size of the display screen is determined, the second range corresponding to the current display screen may be obtained according to the corresponding relationship between the size of the display screen and the second range.
In the embodiment, the size of the display screen is determined by controlling the movement of the image sensor, and the corresponding second range is obtained according to the size of the display screen, so that the accuracy of determining that the output driving line is abnormal, or the output display screen or the lighting equipment is in fault according to the second range is improved.
On the basis of the above embodiment, after the size of the display screen is determined, partial display screen configuration parameters of the display screen can be determined according to the size of the display screen. As shown in fig. 7, after the step 402, the method for adjusting lighting parameters of a display screen further includes:
Since the screen aspect ratio is a ratio of the lateral size to the longitudinal size of the display screen, it can be known from the above method of determining the size of the display screen that the lateral size and the longitudinal size of the display screen can be obtained by controlling the movement of the image sensor, so that the screen aspect ratio can be calculated.
Because the resolution of the display screen is related to the size of the display screen, after the size of the display screen is determined, the resolution corresponding to the display screen can be determined according to the size of the display screen.
In the embodiment, the value of the basic display screen configuration parameter of the display screen can be determined through the size of the display screen, so that the time for adjusting the display screen configuration parameter is shortened, and the speed of the point screen test is improved.
And step 404, determining an effective level, a width of a synchronization head, Htotal and Vtotal corresponding to the display screen according to the resolution.
After the resolution ratio of the display screen is determined according to the size of the display screen, the effective level, the width of the synchronization head, Htotal and Vtotal corresponding to the display screen can be determined according to the resolution ratio, namely the fixed display screen configuration parameters of the display screen are determined, so that the time for determining the secondary display screen configuration parameters is greatly shortened, and the efficiency of screen dot test is improved.
It should be noted that, before adjusting the current configuration parameters of the display screen, the size of the display screen may be determined, and the basic configuration parameters and the fixed configuration parameters of the display screen may be determined according to the size of the display screen, so that the types of configuration parameters of the wrong display screen when the configuration parameters of the important display screen and the secondary display screen corresponding to the display screen are taken as wrong values may be directly determined, and thus, when determining the type of the current configuration parameters of the wrong display screen corresponding to the current sub-pixel array according to the mapping relationship between the sub-pixel array and the type of the configuration parameters of the wrong display screen, the time for determining the type of the current configuration parameters of the wrong display screen may be greatly shortened, and the efficiency of the dot screen test may be improved.
And when the configuration parameters of each display screen are adjusted one by one according to the value ranges respectively corresponding to the configuration parameters of each display screen, only the configuration parameters of the important display screen and the configuration parameters of the secondary display screen can be adjusted, so that the time for finding out the corresponding configuration parameters of the display screen when the sub-pixel array of the display screen is normal can be shortened, and the efficiency of the point screen test is improved.
Furthermore, because the conditions that the configuration parameters of the secondary display screen need to be modified are less, the configuration parameters of the important display screen can be preferentially adjusted, and the configuration parameters of the secondary display screen are tried to be adjusted after the configuration parameters of the important display screen are adjusted to be invalid, so that the process of adjusting the configuration parameters of the display screen is greatly shortened, the screen touch test efficiency is improved, and the development test and production efficiency of the display screen are improved.
In order to implement the above embodiments, an embodiment of the present invention further provides a circuit for adjusting lighting parameters of a display panel. Fig. 9 is a schematic structural diagram of a lighting parameter adjusting circuit of a display panel according to an embodiment of the present invention.
As shown in fig. 9, the display panel lighting parameter adjusting circuit includes: an image sensor 510 and a controller 520.
The image sensor 510 is configured to detect a current sub-pixel array of the display screen. In practical use, the image sensor 510 may be fixedly disposed at a corner of the display screen, and the detection area may be 16 × 16 sub-pixels.
The input end of the controller 520 is connected to the output end of the image sensor 510, and the output end of the controller 520 is connected to the display screen 530, and is configured to drive the display screen 530 to display a test picture, and adjust a current configuration parameter of the display screen when it is determined that the current sub-pixel array detected by the image sensor 510 is abnormal and the display screen 530 is not currently in a black screen state.
Wherein, during testing, a colorful picture can be used as a test picture. For a specific process of adjusting the current configuration parameters of the display screen when the current sub-pixel array is abnormal and the display screen 530 is not in the black screen state, reference may be made to the above embodiments, which are not described herein again.
Further, a hall sensor may be disposed on the output driving line at the output end of the controller, and the current value at the output end of the controller 520 is detected by the hall sensor, so as to determine whether the current value is in the second range when the display screen 530 is currently in the black screen state and the current brightness value is in the first range, so as to avoid abnormal display caused by abnormal output driving line, or failure of the output display screen or failure of the lighting device. For a specific process, reference may be made to the above embodiments, which are not described herein again.
The display screen lighting parameter adjusting circuit comprises an image sensor and a controller, wherein the input end of the controller is connected with the output end of the image sensor, the current sub-pixel array of the display screen is detected through the image sensor, the controller drives the display screen to display a test picture, and when the current sub-pixel array detected by the image sensor is abnormal and the display screen is not in a black screen state currently, current display screen configuration parameters are adjusted. Therefore, in the process of the dot screen test, the configuration parameters of the display screen are automatically adjusted according to the display condition of the sub-pixel array of the test picture under the current configuration parameters of the display screen, and a hardware basis is provided.
In order to implement the above embodiments, the embodiment of the present invention further provides a display screen testing apparatus. Fig. 10 is a schematic structural diagram of a display screen testing apparatus according to an embodiment of the present invention.
As shown in fig. 10, the display screen test apparatus includes: the display screen lighting parameter adjusting circuit according to the above embodiment, and the memory 540;
the display screen lighting parameter adjusting circuit comprises an image sensor 510 and a controller 520; the memory 540 stores a computer program;
the method for adjusting the lighting parameter of the display screen according to the above-described embodiment is implemented when the controller 520 in the circuit for adjusting the lighting parameter of the display screen calls and executes the computer program stored in the memory 540.
In order to implement the foregoing embodiment, an embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the method for adjusting a lighting parameter of a display screen according to the foregoing embodiment is implemented.
In the description of the present specification, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (11)
1. A lighting parameter adjusting method for a display screen comprises the following steps:
detecting whether the current sub-pixel array is normal or not when the display screen displays a test picture under the current display screen configuration parameters;
if not, judging whether the display screen is in a black screen state at present;
if the display screen is not in a black screen state currently, adjusting the current configuration parameters of the display screen;
after judging whether the display screen is in the black screen state at present, the method further comprises the following steps:
if the display screen is in a black screen state currently, judging whether the current brightness value is in a first range or not so as to determine whether the black screen state is caused by low brightness or not;
if the current brightness value is in a first range, judging whether the current driving current value of the display screen is in a second range so as to judge whether the driving current is too large or too small;
if the current driving current value of the display screen is in a second range, outputting a driving line abnormity prompt;
and if the current driving current value of the display screen is not in the second range, outputting a display screen fault or lighting equipment fault prompt.
2. The method of claim 1, wherein said adjusting current display screen configuration parameters comprises:
determining the current configuration parameter type of the error display screen corresponding to the current sub-pixel array according to the mapping relation between the sub-pixel array and the configuration parameter type of the error display screen;
and adjusting the current configuration parameters of the display screen according to the type of the current configuration parameters of the wrong display screen.
3. The method of claim 1, wherein said adjusting current display screen configuration parameters comprises:
adjusting the configuration parameters of each display screen one by one according to the value ranges respectively corresponding to the configuration parameters of each display screen;
and after the configuration parameters of the display screen are adjusted, the detected sub-pixel array of the display screen is normal.
4. The method of claim 1, wherein the detecting whether the current sub-pixel array is normal when the display screen displays the test picture comprises:
determining a target sub-pixel array according to the test picture;
and detecting whether the current sub-pixel array of the display screen is matched with the target sub-pixel array.
5. The method of any of claims 1-4, wherein after determining whether the display screen is currently in a blank screen state, further comprising:
if the display screen is in a black screen state at present, judging whether the current brightness value of the display screen is zero or not;
and if the current brightness value of the display screen is zero, outputting a backlight abnormity prompt.
6. The method of claim 1, wherein before determining whether the current driving current value of the display screen is within the second range, further comprising:
and determining the second range according to the size of the current display screen.
7. The method of claim 6, wherein prior to determining the second range based on the size of the current display screen, further comprising:
controlling the image sensor to move along a first direction and a second direction respectively, and acquiring the moving distances corresponding to the image sensor in the first direction and the second direction respectively when the edges of the image sensor and the display screen are flush;
and determining the size of the display screen according to the size of the image sensor and the movement distance of the image sensor in the first direction and the second direction respectively.
8. The method of claim 7, wherein after determining the size of the display screen, further comprising:
determining the resolution and the screen aspect ratio corresponding to the display screen according to the size of the display screen;
and determining the effective level, the width of a synchronous head, the total number of pixels (Htotal) in the horizontal direction and the total number of pixels (Vtotal) in the vertical direction corresponding to the display screen according to the resolution.
9. A lighting parameter adjusting circuit of a display screen is characterized by comprising: an image sensor and a controller;
the image sensor is used for detecting the current sub-pixel array of the display screen;
the input end of the controller is connected with the output end of the image sensor, the output end of the controller is connected with the display screen, and the controller is used for driving the display screen to display a test picture and adjusting the current configuration parameters of the display screen when the current sub-pixel array detected by the image sensor is determined to be abnormal and the display screen is not in a black screen state currently;
the Hall sensor is used for detecting the current of the output end of the controller, wherein the Hall sensor is used for detecting the current value of the output end of the controller so as to judge whether the current value is in a second range when the display screen is in a black screen state and the current brightness value is in a first range;
wherein, judging whether the current brightness value is in a first range to determine whether the black screen state is caused by low brightness;
and if the current brightness value is in a first range, judging whether the current value is in a second range to judge whether the current of the driving wire is too large or too small.
10. A display screen testing apparatus comprising: the display screen lighting parameter adjusting circuit and the memory according to claim 9;
wherein the memory has stored therein a computer program;
the method for adjusting the lighting parameter of the display panel according to any one of claims 1 to 8 is implemented when a controller in the circuit for adjusting the lighting parameter of the display panel calls and executes a computer program stored in a memory.
11. A computer-readable storage medium, wherein the storage medium stores thereon a computer program, which when executed by a processor, implements the method for adjusting the lighting parameter of the display panel according to any one of claims 1 to 8.
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| CN111078176A (en) * | 2019-12-26 | 2020-04-28 | 惠州视维新技术有限公司 | Display screen lighting method, display device and storage medium |
| CN113658532A (en) * | 2021-07-08 | 2021-11-16 | 惠州高盛达智显科技有限公司 | Screen touch method and system of MIPI (Mobile industry processor interface) screen |
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