Control method of pixel circuit, display device and computer storage medium
By introducing a driving unit and a delay unit into the pixel circuit, the delay parameter is calculated based on the refractive index of the optical waveguide element, and the emission time of the light-emitting diode is adjusted so that different colors of light can reach the imaging position simultaneously in the optical waveguide element, thus solving the problem of image color difference and improving the user experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- INTERFACE ADVANCED TECH (CHENGDU) CO LTD
- Filing Date
- 2023-08-24
- Publication Date
- 2026-05-29
AI Technical Summary
In existing technologies, the color difference phenomenon in images is caused by the different propagation speeds of light of different wavelengths in a lens, which prevents different colors of light from being focused on a single point simultaneously, affecting the user experience, especially in VR and AR display systems where the effect is unsatisfactory.
By introducing a driving unit and a delay unit into the pixel circuit, the delay parameters are calculated based on the standard refractive index and the actual refractive index of the optical waveguide element, and the emission time of the light-emitting diode is adjusted so that different colors of light can reach the imaging position simultaneously in the optical waveguide element.
It improves the suppression of color difference in images and enhances the user experience.
Smart Images
Figure CN117116187B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of display technology, specifically to a control method for pixel circuits, a display device, and a computer storage medium. Background Technology
[0002] Chromatic aberration is a phenomenon caused by different wavelengths of light traveling at different speeds within a lens due to their different refractive indices. This results in different colors of light not being able to focus simultaneously at a single point, or focusing on different focal planes, ultimately leading to color differences in the image.
[0003] In existing technologies, to suppress chromatic aberration in images, multiple lenses are typically used to form an optical system (optical waveguide element) to change the incident angle so that light of different wavelengths reaches the same position, thereby achieving the purpose of suppressing chromatic aberration. However, because light of different wavelengths travels at different speeds within the lens, different wavelengths cannot reach the imaging position simultaneously, resulting in an unsatisfactory effect in suppressing chromatic aberration. Summary of the Invention
[0004] In view of this, this application provides a pixel circuit control method, a display device, and a computer storage medium, which enable the incident light from each light-emitting diode of a pixel to simultaneously reach its corresponding imaging position after being transmitted through an optical waveguide element, thereby improving the effect of suppressing image chromatic aberration. The technical solution of this application is as follows:
[0005] This application provides a control method for a pixel circuit, the pixel circuit including at least three sub-pixel light-emitting branches, each sub-pixel light-emitting branch including a driving unit, a delay unit, and a light-emitting diode (LED). The input terminal of the driving unit is used to receive a driving signal, the output terminal of the driving unit is connected to the anode of the LED, the first terminal of the delay unit is connected to the anode of the LED, the second terminal of the delay unit is grounded, and the cathode of the LED is grounded. The control method includes: obtaining the standard refractive index of an optical waveguide element based on the information to be displayed of the pixel, the optical waveguide element being used to connect... The system collects and conducts the incident light from the light-emitting diodes; obtains the actual refractive index and incident angle of the incident light from each light-emitting diode in the optical waveguide element; obtains the delay parameters of each sub-pixel light-emitting branch based on the actual refractive index, the incident angle, and the standard refractive index; adjusts the delay unit of each sub-pixel light-emitting branch according to the delay parameters, so that the delay unit adjusts the emission time of the light from the corresponding light-emitting diode; generates the driving signal of each sub-pixel light-emitting branch according to the information to be displayed, and transmits the driving signal to the driving unit of each sub-pixel light-emitting branch.
[0006] In one embodiment of this application, the delay unit includes an adjustable capacitor, the first end of which is connected to the anode of the light-emitting diode, and the second end of which is grounded; the delay parameter includes the target capacitance value of the adjustable capacitor; obtaining the delay parameter of each sub-pixel light-emitting branch includes: obtaining the delay time value of the sub-pixel light-emitting branch based on the actual refractive index, the incident angle, and the standard refractive index; and obtaining the target capacitance value of the adjustable capacitor based on the delay time value, the driving voltage and impedance of the light-emitting diode.
[0007] In one embodiment of this application, adjusting the delay unit of each of the sub-pixel light-emitting branches according to the delay parameter includes: adjusting the adjustable capacitor of each of the sub-pixel light-emitting branches to the target capacitance value according to the obtained target capacitance value.
[0008] In one embodiment of this application, obtaining the standard refractive index of the optical waveguide element based on the information to be displayed of the pixels includes: obtaining the color light with the highest proportion from the information to be displayed as the standard light; and setting the refractive index of the standard light on the optical waveguide element to the standard refractive index.
[0009] In one embodiment of this application, obtaining the standard refractive index of the optical waveguide element based on the information to be displayed of the pixels includes: obtaining the color light with the highest refractive index in the optical waveguide element from the information to be displayed as the standard light; and setting the refractive index of the standard light in the optical waveguide element as the standard refractive index.
[0010] In one embodiment of this application, the pixel includes at least one sub-pixel light-emitting branch of a first color light, at least one sub-pixel light-emitting branch of a second color light, and at least one sub-pixel light-emitting branch of a third color light; obtaining the standard refractive index of the optical waveguide element based on the information to be displayed of the pixel includes: selecting the color light with the highest proportion in the information to be displayed from the first color light, the second color light, and the third color light as the standard light; and setting the refractive index of the standard light on the optical waveguide element as the standard refractive index.
[0011] In one embodiment of this application, the pixel includes at least one sub-pixel light-emitting branch of a first color light, at least one sub-pixel light-emitting branch of a second color light, and at least one sub-pixel light-emitting branch of a third color light; obtaining the standard refractive index of the optical waveguide element based on the display information of the pixel includes: taking the color light with the highest actual refractive index among the first color light, the second color light, and the third color light as the standard light; and setting the refractive index of the standard light in the optical waveguide element as the standard refractive index.
[0012] In one embodiment of this application, the sub-pixel light-emitting branch further includes a discharge unit, the first end of the discharge unit is connected to the first end of the adjustable capacitor, and the second end of the discharge unit is grounded; the control method further includes: when the sub-pixel light-emitting branch is stopped from being driven, sending a discharge signal to the discharge unit to control the discharge unit to release the charge of the adjustable capacitor to ground.
[0013] A second aspect of this application provides a display device including multiple pixel circuits and a controller. The pixel circuits include at least three sub-pixel light-emitting branches. Each sub-pixel light-emitting branch includes a driving unit, a delay unit, and a light-emitting diode (LED). The input terminal of the driving unit is used to receive a driving signal, and the output terminal of the driving unit is connected to the anode of the LED. The first terminal of the delay unit is connected to the anode of the LED, and the second terminal of the delay unit is grounded. The cathode of the LED is grounded. The controller is connected to both the input terminal of the driving unit and the delay unit. The controller is used to: acquire optical waveguide elements based on the information to be displayed in the pixels. The standard refractive index is used to receive and conduct the incident light from the light-emitting diodes; the actual refractive index and incident angle of the incident light from each light-emitting diode in the optical waveguide element are obtained; the delay parameters of each sub-pixel light-emitting branch are obtained according to the actual refractive index, the incident angle and the standard refractive index; the delay unit of each sub-pixel light-emitting branch is adjusted according to the delay parameters so that the delay unit adjusts the emission time of the light from the corresponding light-emitting diode; the driving signal of each sub-pixel light-emitting branch is generated according to the information to be displayed, and the driving signal is transmitted to the driving unit of each sub-pixel light-emitting branch.
[0014] In one embodiment of this application, the delay unit includes an adjustable capacitor, a first terminal of which is connected to the anode of the light-emitting diode, and a second terminal of which is grounded; the delay parameter includes a target capacitance value of the adjustable capacitor; the controller is further configured to: obtain the delay time value of the sub-pixel light-emitting branch based on the actual refractive index, the incident angle, and the standard refractive index; and obtain the target capacitance value of the adjustable capacitor based on the delay time value, the driving voltage and impedance of the light-emitting diode.
[0015] A third aspect of this application provides a computer storage medium storing a computer program that, when executed by a processor, causes the processor to perform the pixel circuit control method described above.
[0016] This application obtains the standard refractive index and the actual refractive index of each light-emitting diode in the pixel by obtaining the information to be displayed. Then, it calculates the delay parameters of each sub-pixel light-emitting branch using the standard refractive index, actual refractive index, and incident angle. Based on the delay parameters, it adjusts the delay units of each sub-pixel light-emitting branch and drives each light-emitting diode to work. This allows the light-emitting diodes of each sub-pixel light-emitting branch to input the corresponding color light to the optical waveguide element according to the delay parameters. As a result, color light with different refractive indices can be emitted from the exit position at the same time after being transmitted through the optical waveguide element. This ensures that the incident light from each light-emitting diode of the pixel can reach the corresponding imaging position simultaneously after being transmitted through the optical waveguide element, thereby improving the effect of suppressing image color difference and improving the user experience. Attached Figure Description
[0017] Figure 1 This is a schematic block diagram of a pixel circuit provided in an embodiment of this application.
[0018] Figure 2 This is a flowchart illustrating a pixel circuit control method provided in an embodiment of this application.
[0019] Figure 3 This is a circuit diagram of a sub-pixel light-emitting branch provided in an embodiment of this application.
[0020] Figure 4 This is a flowchart illustrating a method for obtaining delay parameters of a sub-pixel light-emitting branch according to an embodiment of this application.
[0021] Figure 5 This is a flowchart illustrating a standard refractive index acquisition method provided in an embodiment of this application.
[0022] Figure 6 This is a flowchart illustrating the second standard refractive index acquisition method provided in the embodiments of this application.
[0023] Figure 7 This is a flowchart illustrating the third standard refractive index acquisition method provided in the embodiments of this application.
[0024] Figure 8 This is a flowchart illustrating the fourth standard refractive index acquisition method provided in the embodiments of this application.
[0025] Figure 9 This is a circuit diagram of another sub-pixel light-emitting branch provided in an embodiment of this application.
[0026] Figure 10 This is a flowchart illustrating another pixel circuit control method provided in an embodiment of this application.
[0027] Figure 11This is a schematic block diagram of a display device provided in an embodiment of this application. Detailed Implementation
[0028] It should be noted that in the embodiments of this application, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone, where A and B can be singular or plural. The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and drawings of this application are used to distinguish similar objects, not to describe a specific order or sequence.
[0029] It should also be noted that the methods disclosed in the embodiments of this application or the methods shown in the flowcharts include one or more steps for implementing the method. Without departing from the scope of the claims, the execution order of multiple steps can be interchanged, and some steps can also be deleted.
[0030] Chromatic aberration is a phenomenon caused by different wavelengths of light traveling at different speeds within a lens due to their different refractive indices. This results in different colors of light not being able to focus simultaneously at a single point, or focusing on different focal planes, ultimately leading to color differences in the image.
[0031] In existing technologies, to suppress chromatic aberration in images, multiple lenses are typically used to form an optical system (optical waveguide element) to change the incident angle so that light of different wavelengths reaches the same position, thereby achieving the purpose of suppressing chromatic aberration. However, because light of different wavelengths travels at different speeds within the lens, different wavelengths cannot reach the imaging position simultaneously, resulting in an unsatisfactory effect in suppressing chromatic aberration.
[0032] For example, a single pixel typically consists of three or more light-emitting diodes (LEDs) of different colors. By controlling the intensity ratio of the different colors in the LEDs, the pixel can display the desired color. However, because different colors of light have different refractive indices in the optical waveguide element, the incident light from each LED in the pixel cannot simultaneously reach the corresponding imaging position after being transmitted through the optical waveguide element. Especially in VR (Virtual Reality) or AR (Augmented Reality) display systems that use lens groups as optical waveguide elements for light path refraction imaging, the effect of suppressing image color difference is not ideal, affecting the user experience.
[0033] This application provides a control method for pixel circuits, a display device, and a computing storage medium, which enables the incident light from each light-emitting diode of a pixel to simultaneously reach the corresponding imaging position after being transmitted through an optical waveguide element, thereby improving the effect of suppressing image color difference.
[0034] Please refer to Figure 1 , Figure 1 This is a schematic block diagram of a pixel circuit 100 provided in an embodiment of this application. The pixel circuit 100 includes at least three sub-pixel light-emitting branches 110 (three branches are shown in the example in the figure). Each sub-pixel light-emitting branch 110 includes a driving unit 111, a delay unit 112, and a light-emitting diode 113. The input terminal of the driving unit 111 is used to receive a driving signal, and the output terminal of the driving unit 111 is connected to the anode of the light-emitting diode 113. The first terminal of the delay unit 112 is connected to the anode of the light-emitting diode 113, the second terminal of the delay unit 112 is grounded, and the cathode of the light-emitting diode 113 is grounded.
[0035] The aforementioned drive signals are issued by a controller, which includes, but is not limited to, a processor. In this embodiment, the type and location of the controller are not limited; the controller only needs to be connected to each pixel circuit 100 and control the pixel circuit 100. For example, in some scenarios, the controller can be a processor of a display device having the aforementioned pixel circuit 100; or, in other scenarios, the controller can be a processor of an electronic device including the aforementioned display device.
[0036] Next, combined Figure 2 This application introduces a control method for a pixel circuit, which specifically includes the following steps:
[0037] Step S21: Obtain the standard refractive index of the optical waveguide element based on the information to be displayed for each pixel. The optical waveguide element is used to receive and conduct incident light from the light-emitting diode.
[0038] In this embodiment, the display information includes the color or pattern that the pixel will display. After obtaining the display information corresponding to the pixel, the controller can match the display information with a preset database to obtain a standard refractive index. The preset database can pre-store display information and associated refractive indices. For example, in an application scenario where the display information is a color, the controller matches the corresponding color information with the preset database to obtain the refractive index of that color in the optical waveguide element as the aforementioned standard refractive index.
[0039] Step S22: Obtain the actual refractive index and incident angle of the incident light from each LED to the optical waveguide element.
[0040] It is understandable that the color of light emitted by the LEDs in each sub-pixel's light-emitting branch is fixed. The intensity of various colors of light is adjusted by the driving unit, thereby allowing the pixel to display various colors. Therefore, the actual refractive index of each LED in the optical waveguide element can also be pre-stored in a database, and the controller can directly call it from the database.
[0041] The aforementioned incident angle, which is the angle at which the colored light emitted by the LED enters the optical waveguide element, can also be stored in the database, and the controller can directly retrieve it from the database.
[0042] Step S23: Obtain the delay parameters of each sub-pixel light-emitting branch based on the actual refractive index, incident angle, and standard refractive index.
[0043] In this embodiment, the controller calculates the delay parameters corresponding to each sub-pixel light-emitting branch based on the actual refractive index, incident angle, and standard refractive index of each sub-pixel light-emitting branch. These delay parameters include the propagation time of each sub-pixel light-emitting branch in the optical waveguide element when all sub-pixel light-emitting branches operate simultaneously, the propagation time of colored light with the standard refractive index in the optical waveguide element, and the delay time of each sub-pixel light-emitting branch calculated based on the aforementioned propagation times.
[0044] For example, in an application scenario where each sub-pixel's light-emitting branch can emit red (R), green (G), and blue (B) light respectively, the formula for the delay parameter includes:
[0045] T R = (L×tanθ×n1) / c;
[0046] T G = (L×tanθ×n2) / c;
[0047] T B = (L×tanθ×n3) / c;
[0048] T1 = (L × tanθ × n0) / c;
[0049] Δt R =T1-T R ;
[0050] Δt G =T1-T G ;
[0051] Δt B =T1-T B .
[0052] In the formula, T R T is the propagation time of red light in the optical waveguide element. G T is the propagation time of green light in the optical waveguide element. BLet T1 be the propagation time of blue light in the optical waveguide element, T2 be the propagation time of light with standard refractive index in the optical waveguide element, L be the absolute distance between the incident and exit points of the colored light in the optical waveguide element, θ be the incident angle, c be the speed of light, n1 be the refractive index of red light in the optical waveguide element, n2 be the refractive index of green light in the optical waveguide element, n3 be the refractive index of blue light in the optical waveguide element, n0 be the standard refractive index, and Δt be the propagation time of blue light in the optical waveguide element. r Δt represents the delay time value of the red light sub-pixel emission branch. G Δt represents the delay time value of the green light sub-pixel emission branch. B This represents the delay time value of the blue light sub-pixel emission branch.
[0053] Step S24: Adjust the delay unit of each sub-pixel light-emitting branch according to the delay parameter so that the delay unit adjusts the light emission time of the corresponding light-emitting tube.
[0054] In this embodiment, after calculating the delay parameters of each sub-pixel light-emitting branch, the controller adjusts the delay units of each sub-pixel light-emitting branch according to the delay parameters. For example, in an application scenario where each sub-pixel light-emitting branch can emit red (R), green (G), and blue (B) light respectively, the controller can adjust the delay units according to the calculated delay time of each sub-pixel light-emitting branch, so that the delay units adjust the emission time of the corresponding light-emitting diodes according to the delay time, and finally enable the colored light emitted by each light-emitting diode to be emitted simultaneously at the emission position of the optical waveguide element after propagation through the optical waveguide element.
[0055] Step S25: Generate driving signals for each sub-pixel light-emitting branch according to the information to be displayed, and transmit the driving signals to the driving units of each sub-pixel light-emitting branch.
[0056] In this embodiment, after adjusting the delay unit of each sub-pixel light-emitting branch of the pixel, the controller generates a driving signal for each sub-pixel light-emitting branch according to the display information, and simultaneously transmits the driving signal to the driving unit of each sub-pixel light-emitting branch to drive each light-emitting tube to emit color light of corresponding intensity, so that the pixel displays the color or pattern corresponding to the information to be displayed.
[0057] It is understood that this application obtains the standard refractive index and the actual refractive index of each light-emitting diode in the pixel by obtaining the information to be displayed of the pixel. Then, it calculates the delay parameters of each sub-pixel light-emitting branch by using the standard refractive index, the actual refractive index, and the incident angle. Based on the delay parameters, it adjusts the delay units of each sub-pixel light-emitting branch. After adjustment, it drives each light-emitting diode to work, so that the light-emitting diodes of each sub-pixel light-emitting branch input the corresponding color light to the optical waveguide element according to the delay parameters. This allows color light with different refractive indices to be emitted from the emission position at the same time after being transmitted through the optical waveguide element. This ensures that the incident light of each light-emitting diode in the pixel can reach the corresponding imaging position at the same time after being transmitted through the optical waveguide element, thereby improving the effect of suppressing image color difference and improving the user experience.
[0058] Understandable, such as Figure 3 As shown, in some application scenarios, the aforementioned delay unit 112 includes an adjustable capacitor C1. The first terminal of the adjustable capacitor is connected to the anode of the LED 113, and the second terminal of the adjustable capacitor C1 is grounded. A resistor R1 can be provided between the anode of the LED 113 and the driving unit 111. The delay parameters include the target capacitance value of the adjustable capacitor C1. In this application scenario, such as... Figure 4 As shown, the steps to obtain the delay parameters of each sub-pixel's emission branch may specifically include:
[0059] Step S41: Obtain the delay time value of the sub-pixel light-emitting branch based on the actual refractive index, incident angle and standard refractive index.
[0060] It is understood that the calculation process of the delay time value can refer to the specific content of the formula for the delay parameter in step S23 above, and will not be repeated here.
[0061] Step S42: Obtain the target capacitance value of the adjustable capacitor based on the delay time value, the driving voltage of the LED, and the impedance.
[0062] It is understandable that in application scenarios where the aforementioned sub-pixel light-emitting branches can emit red (R), green (G), and blue (B) light respectively, the formula for calculating the target capacitance value includes:
[0063] C R =Δt R / {In[(V DD -V R ) / V DD ]×R1};
[0064] C G =Δt G / {In[(V DD -V G ) / V DD ]×R1};
[0065] C B =Δt B / {In[(V DD -V B ) / V DD ]×R1};
[0066] In the formula, C r C is the target capacitance value of the red light sub-pixel emission branch. G C is the target capacitance value of the green light sub-pixel emission branch. B Δt represents the target capacitance value of the blue light sub-pixel emission branch. R Δt represents the delay time value of the red light sub-pixel emission branch. G Δt represents the delay time value of the green light sub-pixel emission branch. B V represents the delay time value of the blue light sub-pixel emission branch. DD V is the operating voltage of the drive unit. R V is the operating voltage of the LED in the red light sub-pixel light-emitting branch. G V is the operating voltage of the LED in the green light sub-pixel light-emitting branch. B This is the operating voltage of the LED in the blue light sub-pixel light-emitting branch.
[0067] In this embodiment of the application, the delay unit 112 that adjusts the light-emitting branch 110 of each sub-pixel according to the delay parameter includes: adjusting the adjustable capacitor C1 of each sub-pixel light-emitting branch 110 to the target capacitance value.
[0068] Please refer to Figure 5 , Figure 5 A flowchart illustrating a standard refractive index acquisition method provided in this application embodiment specifically includes the following steps:
[0069] Step S51: Obtain the color light with the highest proportion from the information to be displayed as the standard light.
[0070] Step S52: Set the refractive index of the standard light to the standard refractive index of the optical waveguide element.
[0071] In this embodiment, after acquiring the information to be displayed for a pixel, the controller can obtain the color light with the highest proportion from the information to be displayed as the standard light, and obtain the refractive index of the standard light as the standard refractive index. For example, if blue light is determined to be the color light with the highest proportion in the information to be displayed, then the refractive index of blue light in the optical waveguide element is used as the standard refractive index.
[0072] It is understandable that the color light with the highest proportion in the information to be displayed is the main color that the pixel needs to display. By using the refractive index of the main color light as the standard refractive index, the light emission branch of the sub-pixel of the main color light does not need to be adjusted with delay, thereby making the pixel display the color or pattern of the information to be displayed of higher quality, and thus improving the user experience.
[0073] Please refer to Figure 6 , Figure 6 A flowchart illustrating the second method for obtaining the standard refractive index provided in this application embodiment is shown, specifically including the following steps:
[0074] Step S61: Obtain the color light with the highest refractive index of the optical waveguide element from the information to be displayed as the standard light.
[0075] Step S62: Set the refractive index of the standard light to the standard refractive index of the optical waveguide element.
[0076] It is understandable that the higher the refractive index of colored light in the optical waveguide element, the lower the transmission speed of the colored light in the optical waveguide element. Therefore, obtaining the colored light with the highest refractive index from the information to be displayed as the standard light facilitates the calculation of the delay parameters of the light-emitting branches of each sub-pixel, thereby reducing the amount of calculation and improving the efficiency of eliminating color difference.
[0077] It is understood that in some application scenarios, the aforementioned pixel circuit 100 includes at least one sub-pixel light-emitting branch 110 for a first color light, at least one sub-pixel light-emitting branch 10 for a second color light, and at least one sub-pixel light-emitting branch 110 for a third color light. In this application scenario, such as... Figure 7 As shown, obtaining the standard refractive index may specifically include the following steps:
[0078] Step S71: Select the color light with the highest proportion of the information to be displayed from the first color light, the second color light and the third color light as the standard light.
[0079] Step S72: Set the refractive index of the standard light to the standard refractive index of the optical waveguide element.
[0080] In this embodiment, the first color light, the second color light, and the third color light can be red light, blue light, and green light, respectively. It is understood that selecting the color light with the highest proportion of the information to be displayed from the first color light, the second color light, and the third color light as the standard light eliminates the need for delay adjustment in the sub-pixel light-emitting branches of the main color light, thereby improving the quality of the pixels when displaying the color or pattern of the information to be displayed, and ultimately enhancing the user experience.
[0081] Understandable, Figure 7 In the corresponding application scenarios, such as Figure 8As shown, obtaining the standard refractive index may further include the following steps:
[0082] Step S81: Use the color light with the highest actual refractive index among the first color light, the second color light, and the third color light as the standard light.
[0083] Step S82: Set the refractive index of the standard light to the standard refractive index of the optical waveguide element.
[0084] It is understandable that using the color light with the highest actual refractive index among the colored lights emitted by the LED as the standard light can facilitate the calculation of the delay parameters of the sub-pixel light-emitting branches of other colored lights, thereby reducing the amount of calculation and improving the efficiency of eliminating color difference.
[0085] Understandable, such as Figure 9 As shown, in some application scenarios, each sub-pixel light-emitting branch 110 also includes a discharge unit 114. The first end of the discharge unit 114 is connected to the first end of the adjustable capacitor C1, and the second end of the discharge unit is grounded.
[0086] The discharge unit 114 includes a switch Q1 and a resistor R2. The first end of the switch Q1 is connected to the first end of the adjustable capacitor C1, and the second end of the switch Q1 is grounded through the resistor R2. The control terminal of the switch Q1 is used to receive the discharge signal.
[0087] exist Figure 9 In the application scenarios shown, such as Figure 10 As shown, the control method for the pixel circuit also includes:
[0088] Step S106: When the driving sub-pixel light-emitting branch is stopped, a discharge signal is sent to the discharge unit to control the discharge unit to release the charge of the adjustable capacitor to ground.
[0089] In this embodiment, the controller is connected to the control terminal of the aforementioned switch Q1. When the sub-pixel light-emitting branch 110 is stopped from being driven, that is, when the drive signal to the sub-pixel light-emitting branch 110 is stopped, the controller generates and sends a discharge signal to the control terminal of the switch Q1, so that the first and second terminals of the switch Q1 are turned on, thereby allowing the charge of the adjustable capacitor C1 to be quickly released to ground, thereby preventing the charge of the adjustable capacitor C1 from being transferred to the anode of the light-emitting diode 113 and preventing the light-emitting diode 113 from being delayed in turning off.
[0090] Please refer to Figure 11 , Figure 11This is a schematic block diagram of a display device 10 provided in an embodiment of this application. The display device 10 includes a plurality of pixel circuits 100 and a controller 200. The pixel circuits 100 include at least three sub-pixel light-emitting branches 110. Each sub-pixel light-emitting branch 110 includes a driving unit 111, a delay unit 112, and a light-emitting diode 113. The input terminal of the driving unit 111 is used to receive driving signals, and the output terminal of the driving unit 111 is connected to the anode of the light-emitting diode 113. The first terminal of the delay unit 112 is connected to the anode of the light-emitting diode 113, and the second terminal of the delay unit 112 is grounded. The cathode of the light-emitting diode 113 is grounded. The controller 200 is connected to the input terminal of the driving unit 111 and the delay unit 112.
[0091] In this embodiment, the controller 200 is configured to: obtain the standard refractive index of the optical waveguide element based on the information to be displayed in the pixel circuit 100, wherein the optical waveguide element is used to receive and conduct the incident light from the light-emitting diode 113; obtain the actual refractive index and incident angle of the incident light from the light-emitting diode 113 of each sub-pixel light-emitting branch 110 in relation to the optical waveguide element; obtain the delay parameters of each sub-pixel light-emitting branch 110 based on the actual refractive index, incident angle, and standard refractive index; adjust the delay unit 112 of each sub-pixel light-emitting branch 110 according to the delay parameters, so that the delay unit 112 adjusts the emission time of the light from the corresponding light-emitting diode 113; generate driving signals for each sub-pixel light-emitting branch 110 based on the information to be displayed, and transmit the driving signals to the driving unit 111 of each sub-pixel light-emitting branch 110 to drive each light-emitting diode 113 to make the pixel circuit 100 display the information to be displayed.
[0092] In some application scenarios, the delay unit 112 includes an adjustable capacitor C1. The first end of the adjustable capacitor C1 is connected to the anode of the light-emitting diode 113, and the second end of the adjustable capacitor C1 is grounded. A resistor R1 can be provided between the anode of the light-emitting diode 113 and the driving unit 111. The delay parameter includes the target capacitance value of the adjustable capacitor C1. Each sub-pixel light-emitting branch 110 also includes a discharge unit 114. The discharge unit 114 includes a switch Q1 and a resistor R2. The first end of the switch Q1 is connected to the first end of the adjustable capacitor C1, and the second end of the switch Q1 is grounded through the resistor R2. The control terminal of the switch Q1 is used to receive the discharge signal from the controller 200.
[0093] In this application scenario, the controller 200 is also used to: obtain the delay time value of the sub-pixel light-emitting branch 110 based on the actual refractive index, incident angle and standard refractive index; and obtain the target capacitance value of the adjustable capacitor C1 as a delay parameter based on the delay time value, the driving voltage and impedance of the light-emitting diode 113.
[0094] In this embodiment, more detailed functional descriptions of the various modules and units described above can be found in the foregoing sections and will not be repeated here. It is understood that the beneficial effects achieved by the display device 10 provided in this embodiment can be referenced from the beneficial effects of the corresponding pixel circuit 100 control method described above, and will not be repeated here.
[0095] This application also provides a computer storage medium storing a computer program that, when executed by a processor, causes the processor to execute the aforementioned pixel circuit control method.
[0096] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in or transmitted through a computer storage medium. The computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., Digital Versatile Discs (DVDs)), or semiconductor media (e.g., solid-state disks (SSDs)).
[0097] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. This program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. The aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks. Unless otherwise specified, the technical features of this embodiment and its implementation can be combined arbitrarily.
[0098] The above embodiments are merely preferred embodiments of this application and are not intended to limit the scope of this application. Any modifications and improvements made by those skilled in the art to the technical solutions of this application without departing from the spirit of this application should fall within the protection scope defined by the claims of this application.
Claims
1. A method for controlling a pixel circuit, characterized in that, The pixel circuit includes at least three sub-pixel light-emitting branches. Each sub-pixel light-emitting branch includes a driving unit, a delay unit, and a light-emitting diode (LED). The input terminal of the driving unit is used to receive a driving signal, and the output terminal of the driving unit is connected to the anode of the LED. The first terminal of the delay unit is connected to the anode of the LED, and the second terminal of the delay unit is grounded. The cathode of the LED is grounded. The control method includes: The standard refractive index of the optical waveguide element is obtained based on the information to be displayed of the pixels. The optical waveguide element is used to receive and conduct the incident light from the light-emitting diode. Obtain the actual refractive index and incident angle of the incident light from each of the light-emitting diodes in the optical waveguide element; Based on the actual refractive index, the incident angle, and the standard refractive index, the delay parameters of each sub-pixel light-emitting branch are obtained; The delay unit of each sub-pixel light-emitting branch is adjusted according to the delay parameter so that the delay unit adjusts the emission time of the light of the corresponding light-emitting tube, so that the emitted light of each sub-pixel light-emitting branch is transmitted through the optical waveguide element and emitted from the emission position at the same time to reach the corresponding imaging position at the same time. The driving signal for each of the sub-pixel light-emitting branches is generated according to the information to be displayed, and the driving signal is transmitted to the driving unit of each of the sub-pixel light-emitting branches.
2. The control method as described in claim 1, characterized in that, The delay unit includes an adjustable capacitor, the first terminal of which is connected to the anode of the light-emitting diode, and the second terminal of which is grounded; the delay parameters include the target capacitance value of the adjustable capacitor, and obtaining the delay parameters of each sub-pixel light-emitting branch includes: The delay time value of the sub-pixel light-emitting branch is obtained based on the actual refractive index, the incident angle, and the standard refractive index. The target capacitance value of the adjustable capacitor is obtained based on the delay time value, the driving voltage and impedance of the light-emitting diode.
3. The control method as described in claim 2, characterized in that, The step of adjusting the delay unit of each sub-pixel light-emitting branch according to the delay parameter includes: Based on the obtained target capacitance value, the adjustable capacitance of each sub-pixel light-emitting branch is adjusted to the target capacitance value.
4. The control method as described in claim 1, characterized in that, The step of obtaining the standard refractive index of the optical waveguide element based on the display information of the pixels includes: The color light with the highest proportion in the information to be displayed is selected as the standard light; The standard light is applied to the optical waveguide element at the standard refractive index.
5. The control method as described in claim 1, characterized in that, The step of obtaining the standard refractive index of the optical waveguide element based on the display information of the pixels includes: The color light with the highest refractive index obtained from the information to be displayed in the optical waveguide element is used as the standard light; The standard light is applied to the optical waveguide element at the standard refractive index.
6. The control method as described in claim 1, characterized in that, The pixel includes at least one sub-pixel light-emitting branch of a first color light, at least one sub-pixel light-emitting branch of a second color light, and at least one sub-pixel light-emitting branch of a third color light. The step of obtaining the standard refractive index of the optical waveguide element based on the display information of the pixels includes: From the first color light, the second color light, and the third color light, select the color light with the highest proportion of the information to be displayed as the standard light; The standard light is applied to the optical waveguide element at the standard refractive index.
7. The control method as described in claim 1, characterized in that, The pixel circuit includes at least one sub-pixel light-emitting branch of a first color light, at least one sub-pixel light-emitting branch of a second color light, and at least one sub-pixel light-emitting branch of a third color light. The step of obtaining the standard refractive index of the optical waveguide element based on the display information of the pixels includes: The color light with the highest actual refractive index among the first color light, the second color light, and the third color light is used as the standard light; The standard light is applied to the optical waveguide element at the standard refractive index.
8. The control method as described in claim 2, characterized in that, The sub-pixel light-emitting branch further includes a discharge unit, the first end of which is connected to the first end of the adjustable capacitor, and the second end of which is grounded; the control method further includes: When the sub-pixel light-emitting branch is stopped from being driven, a discharge signal is sent to the discharge unit to control the discharge unit to release the charge of the adjustable capacitor to ground.
9. A display device, characterized in that, The device includes multiple pixel circuits and a controller. The pixel circuits include at least three sub-pixel light-emitting branches. Each sub-pixel light-emitting branch includes a driving unit, a delay unit, and a light-emitting diode (LED). The input terminal of the driving unit is used to receive driving signals, and the output terminal of the driving unit is connected to the anode of the LED. The first terminal of the delay unit is connected to the anode of the LED, and the second terminal of the delay unit is grounded. The cathode of the LED is grounded. The controller is connected to the input terminal of the driving unit and the delay unit, respectively. The controller is used for: The standard refractive index of the optical waveguide element is obtained based on the information to be displayed of the pixels. The optical waveguide element is used to receive and conduct the incident light from the light-emitting diode. Obtain the actual refractive index and incident angle of the incident light from each of the light-emitting diodes in the optical waveguide element; Based on the actual refractive index, the incident angle, and the standard refractive index, the delay parameters of each sub-pixel light-emitting branch are obtained; The delay unit of each sub-pixel light-emitting branch is adjusted according to the delay parameter so that the delay unit adjusts the emission time of the light from the corresponding light-emitting tube, thereby enabling different refractive indices of color light to be emitted from the emission position at the same time after being transmitted through the optical waveguide element. The driving signal for each of the sub-pixel light-emitting branches is generated according to the information to be displayed, and the driving signal is transmitted to the driving unit of each of the sub-pixel light-emitting branches.
10. A computer storage medium, characterized in that, The computer storage medium stores a computer program that, when executed by a processor, causes the processor to perform the control method for the pixel circuit as described in any one of claims 1 to 8.