Correction methods, apparatus, devices, and display devices for light sensors

Abstract

The present application discloses a correction method, device, equipment and display device for a light sensor. The method includes: applying a target gate voltage to the gate of a light-sensing transistor; obtaining the current ratios corresponding to the light-sensing transistor at multiple first brightnesses, and for any first brightness, comparing the current ratio at the first brightness with the target ratio corresponding to the first brightness to obtain a correction coefficient of the light-sensing transistor at the first brightness, wherein the current ratio is the ratio of the light-sensing current output by the light-sensing transistor to the reference current. According to the embodiments of the present application, the uniformity of the light sensor output data can be improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a correction method, device, equipment and display device for a light sensor. Background Art

[0002] With the continuous upgrading of display devices, many functions have emerged in current display devices in terms of display, such as display devices can automatically adjust screen brightness according to ambient light brightness. When adjusting screen brightness, current display devices mainly obtain the brightness of the current ambient light through a light sensor, and adjust the screen brightness according to the current ambient light brightness. However, the inventors found that the data output by the current light sensor is not uniform. Summary of the invention

[0003] The embodiments of the present application provide a correction method, device, equipment and display device for a light sensor, which can improve the uniformity of output data of the light sensor.

[0004] In a first aspect, an embodiment of the present application provides a correction method for a light sensor, the method comprising: applying a target gate voltage to a gate of a light sensing transistor;

[0005] Obtain the current ratios corresponding to the photosensitive transistor at multiple first brightnesses respectively. For any first brightness, compare the current ratio at the first brightness with the target ratio corresponding to the first brightness to obtain the correction coefficient of the photosensitive transistor at the first brightness, wherein the current ratio is the ratio of the photosensitive current output by the photosensitive transistor to the reference current.

[0006] In a second aspect, based on the same inventive concept, an embodiment of the present invention provides a correction device for a light sensor, characterized in that the light sensor includes a light-sensitive transistor, and the device includes:

[0007] A driving module, used for applying a target gate voltage to the gate of the photosensitive transistor;

[0008] The correction coefficient determination module is used to obtain the current ratios corresponding to the photosensitive transistor at multiple first brightnesses. For any first brightness, the current ratio at the first brightness is compared with the target ratio corresponding to the first brightness to obtain the correction coefficient of the photosensitive transistor at the first brightness, wherein the current ratio is the ratio of the photosensitive current output by the photosensitive transistor to the reference current.

[0009] In the third aspect, based on the same inventive concept, an embodiment thereof provides an electronic device, which includes: a processor and a memory storing computer program instructions, and when the processor executes the computer program instructions, the correction method of the light sensor as in the first aspect embodiment is implemented.

[0010] In the fourth aspect, based on the same inventive concept, an embodiment of the present invention provides a display device, which includes a light sensor and a memory, the light sensor includes a light transistor, the memory stores correction coefficients corresponding to the light transistors at multiple first brightnesses, and the correction coefficients are used to correct the current ratio of the light transistor at the first brightness.

[0011] According to the correction method, device, equipment and display device of the photosensor provided in the embodiments of the present application, on the one hand, the photosensor transistor included in the photosensor is operated at a target gate voltage, and the target gate voltage can be understood as the optimal gate voltage corresponding to the photosensor transistor, so that the working performance of the photosensor transistor can be optimized; on the other hand, the current ratios corresponding to the multiple first brightnesses obtained are compared with the target ratio corresponding to the first brightness to obtain a correction coefficient, and the correction coefficient can be used to correct the current ratio output by the photosensor transistor, thereby providing a correction basis for the output data of different photosensors, thereby improving the uniformity of the output data of different photosensors under the same ambient light brightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Other features, objects and advantages of the present application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals represent the same or similar features and the accompanying drawings are not drawn to scale.

[0013] Figure 1 A schematic diagram showing the corresponding relationship between the gate voltage and current ratio of multiple photosensitive transistors;

[0014] Figure 2 A schematic diagram showing the corresponding relationship between the brightness and current ratio of multiple photosensitive transistors;

[0015] Figure 3 A schematic diagram showing a flow chart of a method for correcting a light sensor provided by an embodiment of the present application;

[0016] Figure 4 A schematic diagram showing the structure of a display device in a method for correcting a light sensor provided in an embodiment of the present application;

[0017] Figure 5 A schematic diagram showing a flow chart of a method for correcting a light sensor provided in another embodiment of the present application;

[0018] Figure 6 A schematic diagram showing brightness and ratio in a correction method for a light sensor provided by an embodiment of the present application;

[0019] Figure 7 A schematic diagram showing a flow chart of a method for correcting a light sensor provided in yet another embodiment of the present application;

[0020] Figure 8 A schematic diagram showing the structure of a correction device for a light sensor provided by an embodiment of the present application is shown;

[0021] Fig. 9 A schematic diagram showing the structure of a display device provided by an embodiment of the present application is shown;

[0022] Fig.10 A schematic diagram showing the structure of a display device provided by another embodiment of the present application is shown;

[0023] Fig.11 A schematic structural diagram of an electronic device provided by an embodiment of the present application is shown. DETAILED DESCRIPTION

[0024] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0026] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or another region, it may mean that it is directly on the other layer or another region, or that other layers or regions are included between it and the other layer or another region. Moreover, if the component is turned over, the layer or a region will be "below" or "beneath" another layer or another region.

[0027] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0028] In the embodiments of the present application, the term “connection” may refer to a direct connection between two components, or may refer to a connection between two components via one or more other components.

[0029] It is obvious to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit or scope of the present application. Therefore, the present application is intended to cover modifications and changes of the present application that fall within the scope of the corresponding claims (technical solutions for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present application can be combined with each other without contradiction.

[0030] Before describing the technical solutions provided by the embodiments of the present application, in order to facilitate the understanding of the embodiments of the present application, the present application first specifically describes the problems existing in the related art:

[0031] As mentioned in the background technology, the data output by current light sensors is not uniform. For example, different light sensors output different data under the same ambient light brightness. If light sensors are used to adjust screen brightness, and different light sensors output different data under the same ambient light brightness, different display devices will adjust screen brightness inconsistently under the same ambient light brightness, affecting user experience.

[0032] The inventors studied the causes of the above technical problems and found that the light sensor includes a light sensing transistor, and different light sensing transistors have different characteristics. Figure 1 As shown, the inventor irradiates multiple light sensor samples, such as sample 1, sample 2 and sample 3, with light of the same brightness, for example, each sample includes a photosensitive transistor. Different gate voltages are applied to the photosensitive transistors included in sample 1, sample 2 and sample 3, and the current ratio of sample 1, sample 2 and sample 3 at the same brightness and each gate voltage is tested. The current ratio can be equal to the ratio of the photosensitive current output by the photosensitive transistor to the preset reference current. Figure 1 The horizontal axis in the middle can represent the gate voltage, and the vertical axis can represent the current ratio. For example, when the current ratio is 7.5, the gate voltages corresponding to different samples are different. Assuming that the gate voltage corresponding to the current ratio of each sample is 7.5 is the optimal gate voltage of each sample, the optimal gate voltage of each sample is different, that is, the optimal gate voltages of different photosensitive transistors are different.

[0033] Then, the inventors applied the optimal gate voltages corresponding to Sample 1, Sample 2, and Sample 3, and adjusted the brightness irradiated to each sample, and obtained the following: Figure 2 The corresponding relationship between brightness and current ratio is shown. Figure 2 The horizontal axis represents brightness, the vertical axis represents current ratio, and the unit of brightness can be lux. The inventors found that even if the photosensitive transistor operates at an optimal gate voltage, the current ratios of different photosensitive transistors at the same brightness are still different.

[0034] Since different photosensitive transistors have different optimal gate voltages, their current ratios at the same brightness are different. This inconsistency causes the output data of the photosensitive sensor to be inconsistent under the same ambient light brightness.

[0035] To solve the above problems, the embodiments of the present application provide a correction method, device, equipment and display device for a light sensor. The following will describe the various embodiments of the correction method, device, equipment and display device for a light sensor in conjunction with the accompanying drawings.

[0036] First, a correction method for a light sensor provided in an embodiment of the present application is introduced.

[0037] like Figure 3 As shown, the correction method of the light sensor provided in the embodiment of the present application includes S110 to S120.

[0038] S110, applying a target gate voltage to the gate of the photosensitive transistor;

[0039] S120, obtaining the current ratios corresponding to the photosensitive transistors at multiple first brightnesses respectively, and for any first brightness, comparing the current ratio at the first brightness with the target ratio corresponding to the first brightness to obtain a correction coefficient of the photosensitive transistor at the first brightness, wherein the current ratio is the ratio of the photosensitive current output by the photosensitive transistor to the reference current.

[0040] Exemplarily, the light sensor may include a light-sensing transistor, which can output different light-sensing currents according to the light of different brightness irradiating itself. The light-sensing current can be compared with a preset reference current to obtain a current ratio, so that the light-sensing transistor corresponds to different current ratios under different brightness.

[0041] The photosensitive transistor may include an amorphous silicon (a-Si) thin film transistor.

[0042] The specific implementation of S110 to S120 will be described in detail below.

[0043] According to the correction method of the photosensor provided in the embodiment of the present application, on the one hand, the photosensor transistor included in the photosensor is operated at a target gate voltage, and the target gate voltage can be understood as the optimal gate voltage corresponding to the photosensor transistor, so that the working performance of the photosensor transistor can be optimized; on the other hand, the current ratios corresponding to the multiple first brightnesses obtained are compared with the target ratio corresponding to the first brightness to obtain a correction coefficient, and the correction coefficient can be used to correct the current ratio output by the photosensor transistor, thereby providing a correction basis for the output data of different photosensors, thereby improving the uniformity of the output data of different photosensors under the same ambient light brightness.

[0044] The specific implementation of S110 to S120 is introduced below.

[0045] First, let me introduce S110.

[0046] like Figure 4 As shown, the display device 100 may include a light sensor 10, and the light sensor 10 includes a light sensing transistor. In addition, the display device 100 may also include a driver chip 20, and the driver chip 20 is connected to the light sensor 10. The driver chip 20 may receive the light sensing current output by the light sensor 10. The driver chip 20 may be a chip dedicated to adjusting the screen brightness, or may be integrated in a display driver chip of the display device.

[0047] For example, the driver chip 20 may include a power supply port, which may be connected to the gate of the photosensitive transistor, so as to apply a target gate voltage to the gate of the photosensitive transistor. Of course, other power supply ports may also be used to apply a target gate voltage to the gate of the photosensitive transistor, which is not limited in this application.

[0048] Exemplarily, the source of the photosensitive transistor may be connected to a fixed voltage terminal, and the drain of the photosensitive transistor may be connected to a current receiving terminal.

[0049] As introduced above, different photosensitive transistors have different optimal gate voltages, that is, different photosensitive transistors have different target gate voltages. In order to obtain a correction coefficient suitable for each photosensitive transistor based on the characteristics of each photosensitive transistor, the target gate voltages corresponding to different photosensitive transistors can be determined first.

[0050] In some optional embodiments, such as Figure 5 As shown, before S110, the correction method of the light sensor provided in the embodiment of the present application may further include S111 and S112.

[0051] S111, irradiating the light-sensing transistor with light of a second brightness;

[0052] S112, determining a gate voltage of the photosensitive transistor when the current ratio of the photosensitive transistor at the second brightness is equal to a preset ratio, and using the gate voltage as a target gate voltage.

[0053] For example, please refer to Figure 4 , the light emitting device 200 can be used to illuminate the display device 100 , and the light of the second brightness emitted by the light emitting device 200 can illuminate the photosensitive transistor in the display device 100 .

[0054] Limited by the maximum displayable brightness of the display device 100, the display device 100 has a certain adjustment range for the brightness of the ambient light in the process of adjusting the screen brightness according to the ambient light. The second brightness may be the critical ambient light brightness corresponding to the screen brightness adjusted by the display device. For example, when the brightness of the ambient light is not greater than 20,000 lux, the display device 100 may increase the screen brightness as the ambient light increases. When the brightness of the ambient light is equal to 20,000 lux, the screen brightness of the display device 100 reaches the maximum. When the brightness of the ambient light is greater than 20,000 lux, the display device 100 cannot continue to increase the screen brightness due to the maximum displayable brightness of the display device 100. The second brightness may be 20,000 lux. Of course, the specific value of the second brightness may also be set according to actual needs, and no limitation is made in this application.

[0055] In S112, the photosensor transistor can be continuously illuminated by light of a second brightness, and the gate voltage applied to the photosensor transistor can be continuously adjusted during the illumination process, and the photosensor current output by the photosensor transistor under different gate voltages can be obtained, and the ratio of the photosensor current corresponding to the different gate voltages to the preset reference current can be calculated to obtain the current ratio corresponding to the different gate voltages, and determine the gate voltage corresponding to the current ratio equal to the preset ratio, and then use the gate voltage as the target gate voltage.

[0056] In the process of determining the target gate voltage, a light-sensing current receiver is required, and the preset ratio can be determined according to the current range that the light-sensing current receiver can detect. Exemplarily, the ratio of the maximum value to the minimum value of the current range that the light-sensing current receiver can detect can be used as the preset ratio.

[0057] For example, using Figure 4 The driver chip 20 shown receives the light-sensing current output by the phototransistor. Taking the current range that the driver chip 20 can detect as 40uA to 300uA as an example, the preset ratio can be equal to 300 / 40, that is, the preset ratio can be equal to 7.5.

[0058] Of course, the specific value of the preset ratio can also be set according to actual needs, and this application does not limit this.

[0059] Exemplarily, after S112, the correction method of the light sensor provided in the embodiment of the present application may further include: storing the target gate voltage corresponding to the light sensing transistor in a memory corresponding to the display device. For example, the target gate voltage corresponding to the light sensing transistor is stored in a storage area of ​​the driver chip 20. In this way, when the display device adjusts the screen brightness, the target gate voltage can be directly called, and the corresponding target gate voltage is applied to the gate of the light sensing transistor, so that the light sensing transistor always works at the optimal gate voltage.

[0060] In order to ensure that the display device can accurately adjust the screen brightness according to the ambient light, a reference transistor can be provided, and the reference transistor can be a non-photosensitive transistor. For example, the light sensor can include a reference transistor, or the reference transistor can be another transistor in the display device. In order to distinguish between the reference transistor and the photosensitive transistor, the reference transistor is referred to as a non-photosensitive transistor herein. As an example, the structure of the reference transistor and the structure of the photosensitive transistor can be the same, and a shading portion can be provided to shield the reference transistor from light, thereby blocking light from irradiating the reference transistor.

[0061] A voltage that is the same as the gate voltage of the photosensitive transistor may be applied to the gate of the reference transistor, and a current output by the reference transistor may be obtained as a reference current.

[0062] For example, S110 may specifically include: applying a target gate voltage to the gate of the photosensitive transistor and the gate of the reference transistor. S120 may obtain the current ratios corresponding to the photosensitive transistors at multiple first brightnesses, which may specifically include: obtaining the photosensitive currents corresponding to the photosensitive transistors at multiple first brightnesses; obtaining the reference current output by the reference transistor; and respectively calculating the ratios of each photosensitive current to the reference current to obtain multiple current ratios.

[0063] It can be understood that, since light cannot irradiate the reference transistor, the reference current of the reference transistor under the same gate voltage and different first brightness is the same.

[0064] For another example, S112 may specifically include: continuously adjusting the gate voltage applied to the photosensitive transistor and the reference transistor, and obtaining the photosensitive current output by the photosensitive transistor and the reference current output by the reference transistor under different gate voltages, calculating the ratio of the photosensitive current corresponding to different gate voltages to the reference current, obtaining the current ratio corresponding to different gate voltages, and determining the gate voltage corresponding to the current ratio when the current ratio is equal to the preset ratio, and then using the gate voltage as the target gate voltage.

[0065] For example, the gate voltage applied to the photosensitive transistor and the reference transistor is V1, and the photosensitive current is I 11 , the reference current is I 21 , then the current ratio corresponding to the gate voltage V1 is I11 / I 21 For another example, the gate voltage applied to the photosensitive transistor and the reference transistor is V2, and the photosensitive current is I 12 , the reference current is I 22 , then the current ratio corresponding to the gate voltage V2 is I 12 / I 22 .

[0066] It is understandable that in the process of determining the target gate voltage, if the initially set gate voltage cannot meet the requirements, it is necessary to continuously adjust the gate voltage. The adjustment of the gate voltage of the reference transistor is synchronized with the adjustment of the gate voltage of the photosensitive transistor. Therefore, in this process, the reference currents obtained multiple times are different.

[0067] Next, let us introduce S120.

[0068] In some optional embodiments, S120 compares the current ratio at the first brightness with the target ratio corresponding to the first brightness to obtain a correction coefficient of the photosensitive transistor at the first brightness, which may specifically include: taking the difference or ratio between the current ratio at the first brightness and the target ratio corresponding to the first brightness as the correction coefficient of the photosensitive transistor at the first brightness.

[0069] The target ratios corresponding to different first brightnesses may be different. The target ratio may increase as the brightness value increases. Figure 6 As shown, Figure 6 The horizontal axis represents brightness, and the vertical axis represents ratio. The values ​​of the first brightness can be a, b, c, etc. The target ratios corresponding to the first brightnesses are different. The larger the value of the first brightness, the larger the value of the target ratio.

[0070] Exemplarily, the correction coefficient may be equal to the difference between the target ratio corresponding to the first brightness and the current ratio at the first brightness. When the current ratio at the first brightness is subsequently corrected, the sum of the current ratio at the first brightness and the correction coefficient may be calculated, and the sum of the two may be used as the corrected current ratio.

[0071] Alternatively, the correction coefficient may be equal to the ratio of the target ratio corresponding to the first brightness to the current ratio at the first brightness. When the current ratio at the first brightness is subsequently corrected, the product of the current ratio at the first brightness and the correction coefficient may be calculated, and the product of the two may be used as the corrected current ratio.

[0072] Exemplarily, after the current ratio is corrected using the correction coefficient, the corrected current ratio may be equal to the target ratio.

[0073] As an example, taking the target ratio corresponding to the first brightness a as 1.5 and the current ratio corresponding to the first brightness a as 1.6, the correction coefficient can be equal to the difference between 1.5 and 1.6, that is, the correction coefficient can be equal to -0.1. When the current ratio at the first brightness is subsequently corrected, the sum of 1.6 and -0.1 can be used as the corrected current ratio, that is, 1.5 can be used as the corrected current ratio.

[0074] Still taking the target ratio corresponding to the first brightness a as 1.5 and the current ratio corresponding to the first brightness a as 1.6 as an example, the correction coefficient can be equal to the ratio of 1.5 to 1.6, that is, the correction coefficient can be equal to 1.5 / 1.6. When the current ratio at the first brightness is subsequently corrected, the product of 1.6 and 1.5 / 1.6 can be used as the corrected current ratio, that is, 1.5 can be used as the corrected current ratio.

[0075] For example, the target ratio may be set according to actual needs. For example, the current ratios of multiple light sensors at the first brightness may be obtained, and the average of the multiple current ratios may be used as the target ratio.

[0076] In some optional embodiments, such as Figure 7 As shown, the correction method of the light sensor provided in the embodiment of the present application may further include S130. S130, storing the correction coefficient in a memory corresponding to the display device including the light sensor. For example, the correction coefficient may be stored in a storage area of ​​the driver chip 20. In the process of adjusting the screen brightness, the display device may directly call the pre-stored adjustment coefficient, and may adjust the current ratio based on the stored adjustment coefficient.

[0077] In some optional embodiments, the current ratios of different photosensitive transistors at the same first brightness are corrected based on the correction coefficients corresponding to the different photosensitive transistors at the same first brightness, and the corrected current ratios are the same. Different display devices contain different photosensitive sensors. The embodiments of the present application can make the corrected current ratios corresponding to different display devices at the same first brightness the same, so that the current ratios corresponding to the photosensitive sensors of the same batch or even different batches can be unified, thereby improving the consistency of brightness adjustment of the display devices of the same batch or even different batches. Exemplarily, a display device may include a photosensitive sensor.

[0078] As described above, after the current ratio is corrected using the correction coefficient, the corrected current ratio obtained may be equal to the target ratio. In some optional embodiments, in order to more simply and conveniently achieve the same corrected current ratio of different light sensors at the same first brightness, the target ratios corresponding to different light sensors at the same first brightness may be directly set to be the same.

[0079] It should be noted that the correction method of the light sensor provided in the embodiment of the present application can be executed by a correction device of the light sensor, or a control module in the correction device of the light sensor for executing the correction method of the light sensor. In the embodiment of the present application, the correction device of the light sensor provided in the embodiment of the present application is taken as an example to illustrate the correction method of the light sensor performed by the correction device of the light sensor.

[0080] like Figure 8 As shown, the correction device 800 of the light sensor provided in the embodiment of the present application may include a driving module 801 and a correction coefficient determination module 802. The light sensor includes a light sensing transistor.

[0081] A driving module 801 is used to apply a target gate voltage to the gate of the photosensitive transistor;

[0082] The correction coefficient determination module 802 is used to obtain the current ratios corresponding to the photosensitive transistor at multiple first brightnesses. For any first brightness, the current ratio at the first brightness is compared with the target ratio corresponding to the first brightness to obtain the correction coefficient of the photosensitive transistor at the first brightness, wherein the current ratio is the ratio of the photosensitive current output by the photosensitive transistor to the reference current.

[0083] According to the correction device of the photosensor provided in the embodiment of the present application, on the one hand, the photosensor transistor included in the photosensor is operated at a target gate voltage, and the target gate voltage can be understood as the optimal gate voltage corresponding to the photosensor transistor, so that the working performance of the photosensor transistor can be optimized; on the other hand, the current ratios corresponding to the multiple first brightnesses obtained are compared with the target ratio corresponding to the first brightness to obtain a correction coefficient, and the correction coefficient can be used to correct the current ratio output by the photosensor transistor, thereby providing a correction basis for the output data of different photosensors, thereby improving the uniformity of the data output by different photosensors under the same ambient light brightness.

[0084] In some optional embodiments, the correction device for the light sensor provided in the embodiment of the present application may further include:

[0085] an illumination enabling module, configured to illuminate the light sensing transistor with light of a second brightness;

[0086] The target gate voltage determination module is used to determine the gate voltage of the photosensitive transistor when the current ratio of the photosensitive transistor at the second brightness is equal to the preset ratio, and use the gate voltage as the target gate voltage.

[0087] In some optional embodiments, the reference current is the current of a reference transistor, and the reference transistor is a non-photosensitive transistor, and the gate voltage applied to the reference transistor is the same as that of the photosensitive transistor.

[0088] In some optional embodiments, the correction coefficient determination module 802 may be specifically used to:

[0089] The difference or ratio between the current ratio at the first brightness and the target ratio corresponding to the first brightness is used as a correction coefficient of the photosensitive transistor at the first brightness.

[0090] In some optional embodiments, the current ratios of different photosensitive transistors at the same first brightness are corrected based on the correction coefficients corresponding to the different photosensitive transistors at the same first brightness, and the corrected current ratios are the same.

[0091] In some optional embodiments, different photosensitive transistors have the same target ratio corresponding to the same first brightness.

[0092] In some optional embodiments, the correction device for the light sensor provided in the embodiment of the present application may further include:

[0093] The storage module is used to store the correction coefficient in a memory corresponding to the display device including the light sensor.

[0094] The correction device of the light sensor in the embodiment of the present application can be a device, or a component, integrated circuit, or chip in a terminal. The device can be a mobile electronic device or a non-mobile electronic device. Exemplarily, the mobile electronic device can be a mobile phone, a tablet computer, a laptop computer, a PDA, an in-vehicle electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA), etc. The non-mobile electronic device can be a server, a network attached storage (NAS), a personal computer (PC), a television (TV), a teller machine or a self-service machine, etc., which is not specifically limited in the embodiment of the present application.

[0095] The correction device of the light sensor provided in the embodiment of the present application can achieve Figure 3 To avoid repetition, the various processes in the embodiment of the correction method for the light sensor are not described again.

[0096] Based on the same inventive concept, the present application also provides a display device. Fig. 9As shown, the display device 100 may include a light sensor 10 and a memory 30, wherein the light sensor includes a light transistor, and the memory 30 stores correction coefficients corresponding to the light transistors at multiple first brightnesses, and the correction coefficients are used to correct the current ratio of the light transistors at the first brightness. The correction coefficients stored in the memory 30 may be correction coefficients determined according to the correction method of the light sensor introduced in the above embodiment.

[0097] According to the embodiment of the present application, the correction coefficient can be used to correct the current ratio of the photosensitive transistor output, thereby providing a correction basis for the output data of different photosensitive sensors, thereby improving the uniformity of the output data of different photosensitive sensors under the same ambient light brightness.

[0098] Exemplarily, the memory 30 may be integrated into the driving chip 20 .

[0099] In some optional embodiments, such as Fig.10 As shown, the display device 100 may further include a processing module 40, which may be used to: use a correction coefficient corresponding to the photosensitive transistor at the first brightness to correct the current ratio of the photosensitive transistor at the first brightness, obtain a corrected current ratio, and normalize the corrected current ratio.

[0100] For example, Figure 6 As shown, the corrected current ratio corresponding to the first brightness a is 1.5, the corrected current ratio corresponding to the first brightness b is 2.5, ..., the corrected maximum current ratio is 7.5, and each corrected current ratio can be divided by the largest corrected current ratio and multiplied by 100% to obtain a normalized current ratio. For example, the normalized value corresponding to the first brightness a is 20%, so when the brightness of the external ambient light is the first brightness a, the screen brightness can be adjusted to 20% of the maximum brightness. For another example, the normalized value corresponding to the first brightness b is approximately equal to 33%, so when the brightness of the external ambient light is the first brightness b, the screen brightness can be adjusted to 33% of the maximum brightness.

[0101] According to the embodiment of the present application, after normalization processing, the screen brightness can be adjusted conveniently and quickly according to the normalized value.

[0102] If each brightness is adjusted during the process of determining the correction coefficient, it will take a lot of time and affect efficiency. Therefore, only the correction coefficients under some brightness can be adjusted, and the correction coefficients corresponding to other brightness that have not been adjusted can be determined using the linear difference method.

[0103] In some optional embodiments, the processing module 40 can be specifically used to: determine the correction coefficient corresponding to the photosensitive transistor at a third brightness based on the correction coefficients corresponding to the photosensitive transistor at two adjacent first brightnesses and based on the linear difference method, where the third brightness is between the two adjacent first brightnesses.

[0104] like Figure 6 As shown, the correction coefficient corresponding to the first brightness a is f1, the correction coefficient corresponding to the first brightness b is f2, and the correction coefficient corresponding to the brightness d between the first brightness a and the first brightness b is f3. Then f3 can be calculated according to the following formula:

[0105]

[0106] According to the embodiment of the present application, only the correction coefficients corresponding to part of the brightness can be stored. On the one hand, the time required for debugging the correction coefficients can be reduced, thereby improving production efficiency; on the other hand, the storage space required for the correction coefficients can be reduced, thereby reducing costs.

[0107] Exemplarily, the display device may be a liquid crystal display device, or a micro light emitting diode (Micro LED) display device, a quantum dot display device, an OLED display device, or the like.

[0108] The display device provided in the embodiment of the present application may be a mobile phone, a wearable product, a computer, a television, a vehicle-mounted display device or other display device with a display function, and the present application does not specifically limit this. The display device provided in the embodiment of the present application has the beneficial effects of the display panel provided in the embodiment of the present application, and the specific description of the display panel in the above embodiments can be referred to, and the present embodiment will not be repeated here.

[0109] Fig.11 A schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application is shown.

[0110] The electronic device may include a processor 1101 and a memory 1102 storing computer program instructions.

[0111] Specifically, the processor 1101 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present invention.

[0112] The memory 1102 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 1102 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. In appropriate cases, the memory 1102 may include a removable or non-removable (or fixed) medium. In appropriate cases, the memory 1102 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, the memory 1102 is a non-volatile solid-state memory. In a specific embodiment, the memory 1102 includes a read-only memory (ROM). In appropriate cases, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM) or a flash memory or a combination of two or more of these. Exemplarily, the memory may include a non-volatile transient memory.

[0113] The processor 1101 reads and executes the computer program instructions stored in the memory 1102 to implement any one of the light sensor correction methods in the above embodiments.

[0114] In one example, the electronic device may further include a communication interface 1103 and a bus 1110. Fig.11 As shown, the processor 1101, the memory 1102, and the communication interface 1103 are connected via a bus 1110 and communicate with each other.

[0115] The communication interface 1103 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiment of the present invention.

[0116] Bus 1110 includes hardware, software or both, and the parts of electronic equipment are coupled to each other. For example, but not limitation, bus may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front side bus (FSB), hypertransport (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 1110 may include one or more buses. Although the embodiment of the present invention describes and shows a specific bus, the present invention considers any suitable bus or interconnection.

[0117] The electronic device can execute the correction method of the light sensor in the embodiment of the present application, thereby realizing the combination Figure 3 and Figure 8 A correction method for a light sensor and a correction device for a light sensor are described.

[0118] The embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the driving method of the display panel in the above embodiment can be implemented, and the same technical effect can be achieved. To avoid repetition, it is not repeated here. Among them, the above-mentioned computer-readable storage medium may include a read-only memory (Read-Only Memory, referred to as ROM), a random access memory (Random Access Memory, referred to as RAM), a disk or an optical disk, etc., which is not limited here.

[0119] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application-specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Computer-readable medium" can include any medium capable of storing or transmitting information. Examples of computer-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0120] According to an embodiment of the present application, the computer-readable storage medium may be a non-transitory computer-readable storage medium.

[0121] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0122] The above reference is according to the method of the embodiment of the present application, the flow chart of the device (system) and the computer program product and / or the block diagram described various aspects of the present application.It should be understood that each square box in the flow chart and / or the block diagram and the combination of each square box in the flow chart and / or the block diagram can be realized by computer program instructions.These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the realization of the function / action specified in one or more square boxes of the flow chart and / or the block diagram.Such a processor can be but is not limited to a general-purpose processor, a special-purpose processor, a special application processor or a field programmable logic circuit.It can also be understood that each square box in the block diagram and / or the flow chart and the combination of the square boxes in the block diagram and / or the flow chart can also be realized by the dedicated hardware that performs the specified function or action, or can be realized by the combination of dedicated hardware and computer instructions.

[0123] According to the embodiments described above in the present application, these embodiments do not describe all the details in detail, nor do they limit the present application to the specific embodiments described. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can make good use of the present application and the modifications based on the present application. The present application is limited only by the claims and their full scope and equivalents.

Claims

1. A correction method for a light sensor, characterized in that: The light sensor includes a light sensing transistor, and the method includes: applying a target gate voltage to the gate of the photosensitive transistor; Obtaining current ratios corresponding to the photosensitive transistor at a plurality of first brightnesses respectively, and for any one of the first brightnesses, comparing the current ratio at the first brightness with a target ratio corresponding to the first brightness, to obtain a correction coefficient of the photosensitive transistor at the first brightness, wherein the current ratio is a ratio of a photosensitive current output by the photosensitive transistor to a reference current; Before applying the target gate voltage to the gate of the photosensitive transistor, the method further includes: irradiating the photosensitive transistor with light of a second brightness; When it is determined that the current ratio of the photosensitive transistor at the second brightness is equal to the preset ratio, the gate voltage of the photosensitive transistor is used as the target gate voltage.

2. The method according to claim 1, characterized in that The reference current is the current of a reference transistor, and the reference transistor is a non-photosensitive transistor. The gate voltage applied to the reference transistor is the same as that of the photosensitive transistor.

3. The method according to claim 1, characterized in that The comparing the current ratio at the first brightness with the target ratio corresponding to the first brightness to obtain a correction coefficient of the photosensitive transistor at the first brightness includes: A difference or ratio between the current ratio at the first brightness and a target ratio corresponding to the first brightness is used as a correction coefficient of the photosensitive transistor at the first brightness.

4. The method according to claim 1, characterized in that: The current ratios of different photosensitive transistors at the same first brightness are corrected based on the correction coefficients corresponding to the different photosensitive transistors at the same first brightness, and the corrected current ratios are the same.

5. The method according to claim 4, characterized in that The target ratios corresponding to different photosensitive transistors at the same first brightness are the same.

6. The method according to claim 1, characterized in that The method further comprises: The correction coefficient is stored in a memory corresponding to the display device including the light sensor.

7. A correction device for a light sensor, characterized in that: The light sensor comprises a light-sensitive transistor, and the device comprises: A driving module, used for applying a target gate voltage to the gate of the photosensitive transistor; a correction coefficient determination module, configured to obtain current ratios corresponding to the photosensitive transistor at a plurality of first brightnesses respectively, and for any one of the first brightnesses, compare the current ratio at the first brightness with a target ratio corresponding to the first brightness to obtain a correction coefficient of the photosensitive transistor at the first brightness, wherein the current ratio is a ratio of a light-sensing current output by the photosensitive transistor to a reference current; The processing module is used to illuminate the photosensitive transistor with light of a second brightness; determine the gate voltage of the photosensitive transistor when the current ratio of the photosensitive transistor at the second brightness is equal to a preset ratio, and use the gate voltage as the target gate voltage.

8. An electronic device, characterized in that: include: A processor and a memory storing computer program instructions, wherein the processor implements the correction method of the light sensor according to any one of claims 1 to 6 when executing the computer program instructions.

9. A display device, characterized in that: It includes a photosensor and a memory, the photosensor includes a photosensor transistor, the memory stores correction coefficients corresponding to the photosensor transistors at multiple first brightnesses, the correction coefficients are used to correct the current ratio of the photosensor transistors at the first brightness; the correction coefficients are obtained according to the method described in any one of claims 1-6.

10. The display device according to claim 9, characterized in that: The display device further includes a processing module, wherein the processing module is configured to: The current ratio of the photosensitive transistor at the first brightness is corrected by using the correction coefficient corresponding to the photosensitive transistor at the first brightness to obtain a corrected current ratio, and the corrected current ratio is normalized.

11. The display device according to claim 9, characterized in that The display device further includes a processing module, wherein the processing module is configured to: According to the correction coefficients corresponding to the photosensitive transistor at two adjacent first brightnesses, and based on the linear difference method, the correction coefficient corresponding to the photosensitive transistor at a third brightness is determined, and the third brightness is between the two adjacent first brightnesses.

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