Display apparatus and control method therefor, and device and storage medium

Abstract

A display apparatus. The display apparatus comprises a display substrate and a control unit. The display substrate comprises a first light-emitting component, which comprises a first light-emitting chip, and a first fluorescent portion which is at least located on a light-emitting side of the first light-emitting chip. The control unit is configured to control the first light-emitting chip to emit light, such that a relationship curve of a grayscale and brightness in the first light-emitting chip comprises a first curve segment and a second curve segment, a grayscale corresponding to the first curve segment being less than a grayscale corresponding to the second curve segment, wherein the brightness of the grayscale corresponding to the first curve segment is greater than the brightness of a corresponding grayscale in a reference Gamma curve, and the brightness of the grayscale corresponding to the second curve segment is equal to the brightness of the corresponding grayscale in the reference Gamma curve; and the reference Gamma curve is one of a Gamma curve 2.2 and a Gamma curve 2.8.

Description

Display device, control method, equipment and storage medium thereof Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display device and a control method, equipment, and storage medium thereof. Background Art

[0002] Currently, micro light emitting diode (Micro LED) screens and mini light emitting diode (Mini LED) screens have become a hot topic in the future market due to their advantages such as wide color gamut, high brightness and high color integrity.

[0003] In the related technologies for preparing Micro LED and Mini LED screens, achieving full color through color conversion is a common solution. In this solution, phosphor is the most commonly used luminescent material in the color conversion method, with the advantages of stability and non-toxicity. However, the luminous intensity of the phosphor follows a delayed excitation modulation, that is, it takes a period of time for the phosphor to reach the strongest luminous intensity. If the grayscale has a low duty cycle, the excitation time corresponding to the grayscale may be less than the light-up time for the phosphor to reach the strongest luminous brightness, resulting in incomplete excitation of the phosphor and low conversion efficiency, causing abnormal screen display.

[0004] Therefore, how to ensure that the phosphor can be fully excited during the color conversion process so that the screen displays normally is an urgent problem to be solved.

[0005] Summary of the Invention

[0006] In one aspect, a display device is provided. The display device includes a display substrate and a control unit. The display substrate includes a first light-emitting component, the first light-emitting component including a first light-emitting chip and a first fluorescent portion located at least on a light-emitting side of the first light-emitting chip. The control unit is configured to: control the first light-emitting chip to emit light so that a curve showing a relationship between grayscale and brightness in the first light-emitting chip includes a first curve segment and a second curve segment, wherein the grayscale corresponding to the first curve segment is smaller than the grayscale corresponding to the second curve segment; wherein the brightness of the grayscale corresponding to the first curve segment is greater than the brightness of the corresponding grayscale in a reference gamma curve, and the brightness of the grayscale corresponding to the second curve segment is equal to the brightness of the corresponding grayscale in the reference gamma curve, and the reference gamma curve is one of gamma curve 2.2 and gamma curve 2.8.

[0007] In some embodiments, the relationship curve between different grayscales and brightness in the first light-emitting chip is composed of a first curve segment and a second curve segment, and the first curve segment is connected to the second curve segment.

[0008] In some embodiments, the control unit is configured to: provide a first PWM signal to the first light-emitting chip; the first PWM signal is used to make the light-emitting duty cycle of the first light-emitting chip at the first target grayscale greater than the light-emitting duty cycle of the corresponding grayscale in the reference gamma curve; make the light-emitting duty cycle of the first light-emitting chip at the second target grayscale equal to the light-emitting duty cycle of the corresponding grayscale in the reference gamma curve; wherein the first target grayscale belongs to the grayscale corresponding to the first curve segment, and the second target grayscale belongs to the grayscale corresponding to the second curve segment.

[0009] In some embodiments, the control unit is configured to provide the same current to the first light-emitting chip at each gray level.

[0010] In some embodiments, the control unit is configured to provide a first current to the first light-emitting chip at each first target grayscale and provide a second current to the first light-emitting chip at each second target grayscale, wherein the first current is greater than the second current.

[0011] In some embodiments, the first current is not completely the same for different first target gray levels; and the second current is the same for each second target gray level.

[0012] In some embodiments, the control unit is configured to: provide a second PWM signal to the first light-emitting chip; the second PWM signal is used to make the light-emitting duty cycle of the first light-emitting chip at the first target grayscale equal to the light-emitting duty cycle of the corresponding grayscale on the reference gamma curve; make the light-emitting duty cycle of the first light-emitting chip at the second target grayscale equal to the light-emitting duty cycle of the corresponding grayscale on the reference gamma curve; the control unit is configured to: provide a first current to the first light-emitting chip at each first target grayscale, and provide a second current to the first light-emitting chip at each second target grayscale, the first current being greater than the second current; wherein the first target grayscale belongs to the grayscale corresponding to the first curve segment, and the second target grayscale belongs to the grayscale corresponding to the second curve segment.

[0013] In some embodiments, the first current is different for different first target gray levels.

[0014] In some embodiments, the first current is the same for each first target gray level.

[0015] In some embodiments, the control unit is configured to: provide a PAM signal to the first light-emitting chip, the PAM signal being used to make the relationship curve between grayscale and brightness in the first light-emitting chip include a first curve segment and a second curve segment, the grayscale corresponding to the first curve segment being smaller than the grayscale corresponding to the second curve segment; wherein the brightness of the grayscale corresponding to the first curve segment is greater than the brightness of the corresponding grayscale in the reference gamma curve, and the brightness of the grayscale corresponding to the second curve segment is equal to the brightness of the corresponding grayscale in the reference gamma curve.

[0016] In some embodiments, the control unit is configured to: provide a first current to the first light-emitting chip at each first target grayscale, and provide a second current to the first light-emitting chip at each second target grayscale; wherein the first target grayscale belongs to the grayscale corresponding to the first curve segment, the second target grayscale belongs to the grayscale corresponding to the second curve segment, the first current is different for different first target grayscales, and the second current is different for different second target grayscales.

[0017] In some embodiments, the relationship between the grayscale and brightness of the first light-emitting component satisfies a reference gamma curve.

[0018] In some embodiments, the first light emitting component emits red light.

[0019] In some embodiments, the first light-emitting chip is a blue light chip, and the first fluorescent portion is used to convert light emitted by the first light-emitting chip into red light.

[0020] In some embodiments, the display substrate includes a second light-emitting component, which emits green light. The second light-emitting component includes a second light-emitting chip and a second fluorescent portion located at least on the light-emitting side of the second light-emitting chip. The second light-emitting chip is a blue light chip, and the second fluorescent portion is used to convert the light emitted by the second light-emitting chip into green light. The display substrate includes a third light-emitting chip, which emits blue light. The display substrate includes pixels arranged in an array, and one pixel includes a first light-emitting component, a second light-emitting component, and a third light-emitting chip.

[0021] In another aspect, a control method for a display device is provided, comprising: determining a light-emitting parameter of a first light-emitting chip; wherein the light-emitting parameter is used to cause a grayscale-brightness relationship curve of the first light-emitting chip to include a first curve segment and a second curve segment, wherein the grayscale corresponding to the first curve segment is smaller than the grayscale corresponding to the second curve segment; wherein the brightness of the grayscale corresponding to the first curve segment is greater than the brightness of the corresponding grayscale in a reference gamma curve, and the brightness of the grayscale corresponding to the second curve segment is equal to the brightness of the corresponding grayscale in the reference gamma curve, wherein the reference gamma curve is one of gamma curve 2.2 or gamma curve 2.8; and controlling the first light-emitting chip to emit light based on the light-emitting parameter.

[0022] In some embodiments, the relationship curve between different grayscales and brightness in the first light-emitting chip is composed of a first curve segment and a second curve segment, and the first curve segment is connected to the second curve segment.

[0023] In some embodiments, the luminous parameters include PWM signal parameters; the PWM signal parameters include the luminous duty cycle of a first target grayscale, and the first target grayscale belongs to the grayscale corresponding to the first curve segment; determining the luminous parameters of the first light-emitting chip includes: determining the luminous duty cycle of the first target grayscale based on the luminous brightness and luminous intensity of the grayscale corresponding to the first target grayscale in the reference gamma curve.

[0024] In some embodiments, the PWM signal parameters also include a current value provided by the control unit to the first light-emitting chip at the first target grayscale; determining the luminous parameters of the first light-emitting chip also includes: based on the luminous brightness of the grayscale corresponding to the first target grayscale in the reference gamma curve, and the luminous duty cycle of the first target grayscale, determining the current value provided by the control unit to the first light-emitting chip at the first target grayscale.

[0025] In some embodiments, the current value is not completely the same for different first target gray levels.

[0026] In some embodiments, the luminous parameters include PWM signal parameters; the PWM signal parameter control unit provides a current value to the first light-emitting chip at a first target grayscale, and the first target grayscale belongs to the grayscale corresponding to the first curve segment; determining the luminous parameters of the first light-emitting chip includes: based on the luminous brightness and luminous duty cycle of the grayscale corresponding to the first target grayscale in the reference gamma curve, determining the current value provided by the control unit to the first light-emitting chip at the first target grayscale.

[0027] In some embodiments, the current value is different for different first target gray levels.

[0028] In some embodiments, the current value is the same for different first target gray levels.

[0029] In some embodiments, the luminous parameters include PAM signal parameters; the PAM signal parameters include a current value provided by the control unit to the first light-emitting chip at a first target grayscale, and the first target grayscale belongs to the grayscale corresponding to the first curve segment; determining the luminous parameters of the first light-emitting chip includes: based on the luminous brightness and luminous duty cycle of the grayscale corresponding to the first target grayscale in the reference gamma curve, determining the current value provided by the control unit to the first light-emitting chip at the first target grayscale, and the above current value is different for different first target grayscales.

[0030] In yet another aspect, an electronic device is provided. The electronic device includes a display, at least one processor, and a memory communicatively connected to the at least one processor. The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the display device control method of the above-described embodiment.

[0031] In another aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer program instructions, the computer instructions being used to enable a computer (eg, an electronic device) to execute the control method of the display device according to the above embodiment.

[0032] In another aspect, a computer program product is provided, which includes computer program instructions, and when the computer program instructions are executed on a computer (eg, an electronic device), the computer program instructions cause the computer to execute the control method of the display device according to the above embodiment.

[0033] In another aspect, a computer program is provided. When the computer program is executed on an electronic device, the computer program causes the computer (eg, the electronic device) to execute the method for controlling the display device according to the above-described embodiment.

[0034] In this way, by making the brightness of the grayscale corresponding to the first curve segment in the first light-emitting chip greater than the brightness of the corresponding grayscale in the reference gamma curve, and the brightness of the grayscale corresponding to the second curve segment is equal to the brightness of the corresponding grayscale in the reference gamma curve, it is ensured that the phosphor can be fully excited during the color conversion process, thereby making the screen display normal. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and are not intended to limit the actual dimensions of the products, actual processes of the methods, actual timing of signals, and the like involved in the embodiments of the present disclosure.

[0036] FIG1 is a structural diagram of a color conversion pixel according to some embodiments;

[0037] FIG2 is a lighting waveform diagram of a phosphor according to some embodiments;

[0038] FIG3 is a lighting waveform diagram of phosphors according to some other embodiments;

[0039] FIG4 is a graph showing brightness loss of potassium fluorosilicate KSF phosphor according to some embodiments;

[0040] FIG5 is a lighting waveform diagram of phosphors according to some further embodiments;

[0041] FIG6 is a waveform diagram of a display device according to some embodiments;

[0042] FIG7 is a graph showing the relationship between the first light-emitting chip and brightness according to some embodiments;

[0043] FIG8 is a lighting waveform diagram of phosphors according to yet other embodiments;

[0044] FIG9 is a lighting waveform diagram of phosphors according to some further embodiments;

[0045] FIG10 is a flowchart of a method for controlling a display device according to some embodiments. DETAILED DESCRIPTION

[0046] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0047] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0048] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0049] “At least one of A, B and C” has the same meaning as “at least one of A, B or C” and both include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0050] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0051] As used herein, the term "if" is optionally interpreted to mean "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined that" or "if [stated condition or event] is detected" are optionally interpreted to mean "upon determining" or "in response to determining" or "upon detecting [stated condition or event]" or "in response to detecting [stated condition or event]," depending on the context.

[0052] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0053] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0054] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0055] As mentioned in the background, Micro LED and Mini LED displays have become a hot topic in future market development, but they still face numerous challenges. One of the most challenging challenges facing researchers is the mass transfer process: how to quickly and accurately bond the red, blue, and green LED chips to the panel's driver circuitry while overcoming the challenges posed by the varying chip material properties.

[0056] To address the above difficulties, achieving full colorization through color conversion is an optimal solution. As shown in Figure 1, which is a publicly available structural diagram of a color conversion pixel, to achieve full colorization, the color conversion element can be excited by a blue light source to emit blue light, green light, and red light respectively. Among them, the blue excitation light source can also be directly displayed as blue light.

[0057] In the color conversion method, phosphors are used as the color conversion material. Compared to quantum dots (QDs), phosphors have advantages such as greater stability and non-toxicity. However, the luminescence intensity of phosphors follows a delayed excitation modulation, with a rise time and decay time, generally ranging from microseconds to milliseconds. The rise time is defined as the time from the material receiving excitation light to stable luminescence output, while the decay time is defined as the time from the removal of the light source until the phosphor stops emitting light (not the phosphor's lifetime).

[0058] As shown in Figure 2, it is a lighting waveform diagram of a phosphor provided by an embodiment of the present disclosure. As shown in Figure 2a, the ordinate indicates the luminous intensity of the excitation light source when exciting the phosphor, and the abscissa indicates time. The waveform diagram in Figure 2a is used to characterize the change of the luminous intensity of the excitation light source over time when exciting the phosphor. As shown in Figure 2b, the ordinate indicates the luminous intensity of the phosphor when the excitation light source emits brightness, and the abscissa indicates time. The waveform diagram in Figure 2b is used to characterize the change of the luminous intensity over time when the phosphor is excited.

[0059] As shown in Figure 2b, under the pulse width modulation (PWM) driving mode, the phosphor has a lighting process and a decay process. Among them, the rate constant in the lighting process can be described as the lighting rate constant k rise , the rate constant in the decay process can be described as the decay rate constant k decay The related art shows that the above two rate constants satisfy the following relationship: k rise =k exc +k decay , where k exc is the excitation rate constant and is greater than 0, so the lightening rate constant k rise Greater than the decay rate constant k decay , that is, the light-up rate is higher than the decay rate, and both are exponential photophysical processes.

[0060] As shown in Figure 3, another lighting waveform diagram of a phosphor provided by an embodiment of the present disclosure is shown. As shown in Figure 3a, the ordinate represents the luminous intensity when the excitation light source excites the phosphor, and the abscissa represents time. The waveform in Figure 3a is used to represent the change of the luminous intensity of the excitation light source when the phosphor is excited. As shown in Figure 3b, the ordinate represents the luminous intensity of the phosphor when the excitation light source emits brightness, and the abscissa represents time. The waveform in Figure 3b is used to characterize the change of the luminous intensity of the phosphor when the phosphor is excited.

[0061] As shown in Figure 3(a), the excitation light source does not experience a turn-on and turn-off process, and its luminous brightness follows a square wave over time. As shown in Figure 3(b), Figure b shows how the luminous intensity of the phosphor changes over time when it is excited, when the excitation light source's excitation time is greater than or equal to the phosphor's turn-on time. Figure b shows that the phosphor undergoes a turn-on and turn-off process, and its luminous brightness is the integrated area corresponding to the curve. When the excitation light source's excitation time is greater than the phosphor's turn-on time, the phosphor can achieve the expected luminous intensity, also known as E(max) in the figure. At this time, the total luminous intensity of the phosphor is the area of ​​part a + the area of ​​part c in Figure 3.

[0062] As shown in Figure 2(b), the phosphor's onset rate constant is higher than its decay rate constant. Therefore, it can be assumed that the phosphor's onset rate is higher than its decay rate. Furthermore, it can be concluded that when the excitation light source's excitation time is greater than or equal to the phosphor's onset time, the luminescence gain from the decay process is greater than the luminescence loss from the onset process. Therefore, the area of ​​section c in Figure 3(b) is larger than that of section b. Thus, when the excitation light source's excitation time is greater than or equal to the phosphor's onset time, the phosphor's brightness does not decay, but instead experiences a small amount of luminescence gain.

[0063] FIG4 is a graph showing the brightness loss of a potassium fluorosilicate KSF phosphor at different times provided by an embodiment of the present disclosure, which is used to characterize the change in the luminous gain of the KSF phosphor over time. The ordinate in FIG4 is the percentage of brightness loss, and the abscissa is time. As can be seen from FIG4, the brightness loss changes relatively slowly over time, reflecting that the luminous gain of part c in FIG3 b is small. After integral calculation, it is known that the area of ​​part b in FIG3 b ≈ the area of ​​part c. Therefore, when the excitation time of the excitation light source is greater than or equal to the lighting time of the phosphor, the luminous brightness of the phosphor does not decay.

[0064] As shown in Figure 5, a waveform diagram of another type of phosphor provided by the present disclosure is shown. As shown in Figure 5a, the ordinate represents the luminous intensity when the excitation light source excites the phosphor, and the abscissa represents time. The waveform in Figure 5a is used to represent the change in luminous intensity over time when the excitation light source excites the phosphor. As shown in Figure 5b, the ordinate represents the luminous intensity of the phosphor when the excitation light source emits brightness, and the abscissa represents time. Figure b is used to represent the change in luminous intensity over time when the phosphor is excited.

[0065] Figure a in Figure 5 shows the luminescence of the excitation light source. There is no onset and decay process, and the luminescence brightness of the excitation light source is a complete square wave over time. Figure b in Figure 5 shows the luminescence of the phosphor when the excitation time of the excitation light source is less than the onset time of the phosphor. As shown in Figure b in Figure 5, there are onset and decay processes in the luminescence process of the phosphor. When the excitation time of the excitation light source is less than the onset time of the phosphor, the phosphor cannot reach the expected luminous intensity E(max), resulting in the premature end of the onset process and the premature start of the decay process. When the excitation time of the excitation light source is greater than or equal to the onset time of the phosphor, the luminescence brightness of the phosphor should be the area of ​​part a + part b + part c in Figure b in Figure 5. However, since the excitation time of the excitation light source is less than the onset time of the phosphor, the actual luminescence brightness of the phosphor is the area of ​​part a + part c in Figure b in Figure 5. From the relevant description in Figure 3, it can be seen that the area of ​​part c is ≈ the area of ​​part b. It can be considered that the actual luminous brightness of the phosphor is the area of ​​part a + the area of ​​part b in Figure 5b. It is further determined that when the excitation time of the excitation light source is less than the lighting time of the phosphor, the actual luminous brightness of the phosphor is less than the expected luminous brightness, and the difference is the area of ​​part d in Figure 5.

[0066] From the relevant descriptions of Figures 2 to 5 above, it can be seen that the actual luminous brightness of the phosphor will be equal to the luminous brightness of the excitation light source only when the excitation time of the excitation light source is greater than or equal to the lighting time of the phosphor. However, in actual application, the current mainstream driving modes of Micro LED screens and Mini LED screens are PWM driving modes, which mainly control the grayscale value by adjusting the duty cycle. Under the PWM driving mode, there is a problem of applying current to the excitation light source for too short a time, resulting in the excitation time of the excitation light source being less than the lighting time of the phosphor. When the excitation time of the excitation light source is less than the lighting time of the phosphor, the phosphor has not yet reached the expected luminous intensity and has not started to emit light stably, resulting in the phosphor not being fully excited, causing problems with the corresponding grayscale transition and abnormal screen display.

[0067] In order to solve the above technical problems, as shown in FIG. 6 , the present disclosure provides a display device 60 , which includes a display substrate 610 and a control unit 620 .

[0068] The display device 60 provided in the embodiments of the present disclosure can be any device that displays images, whether in motion (e.g., video) or stationary (e.g., still images), and whether textual or. More specifically, it is contemplated that the embodiments described may be implemented in or associated with a variety of electronic devices, such as, but not limited to, mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat-panel displays, computer monitors, automotive displays (e.g., odometer displays, etc.), navigation systems, cockpit controls and / or displays, displays of camera views (e.g., displays of rearview cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., displays of images of a piece of jewelry), and the like.

[0069] In some embodiments, the display substrate 610 includes a first light-emitting component, which includes a first light-emitting chip and a first fluorescent portion at least located on a light-emitting side of the first light-emitting chip.

[0070] The first light-emitting component emits red light, the first light-emitting chip is a blue light chip, and the first fluorescent part is used to convert the light emitted by the first light-emitting chip into red light.

[0071] In some embodiments, the display substrate 610 further includes a second light-emitting component and a third light-emitting chip. The second light-emitting component includes a second light-emitting chip and a second fluorescent portion at least located on the light-emitting side of the second light-emitting chip.

[0072] The second light-emitting component emits green light, the second light-emitting chip and the third light-emitting chip are blue light chips, and the second fluorescent part is used to convert the light emitted by the second light-emitting chip into green light.

[0073] It should be noted that in the process of realizing the full color of the RGB color system, three light sources capable of emitting red light, green light, and blue light are required. The light-emitting chips in the display substrate 610 are all blue light chips, and emit blue light by default. The first light-emitting component uses a first fluorescent portion to convert the blue light emitted by the first light-emitting chip into red light, and the second light-emitting component uses a second fluorescent portion to convert the blue light emitted by the second light-emitting chip into green light. Only one light source capable of emitting blue light is missing, and the third light-emitting chip is a blue light chip, and emits blue light by default. Therefore, the third light-emitting chip does not need a corresponding fluorescent portion to convert the emitted blue light into light of other colors.

[0074] The main material of the first fluorescent portion and the second fluorescent portion is phosphor, which may be KSF phosphor or yttrium aluminum garnet (YAG) phosphor. Alternatively, phosphors of other materials may be used, which is not limited in the present disclosure.

[0075] In some embodiments, the control unit 620 is configured to control the first light-emitting chip to emit light so that a relationship curve between grayscale and brightness in the first light-emitting chip includes a first curve segment and a second curve segment.

[0076] Among them, the grayscale corresponding to the first curve segment is smaller than the grayscale corresponding to the second curve segment, the brightness of the grayscale corresponding to the first curve segment is greater than the brightness of the corresponding grayscale in the reference gamma curve, and the brightness of the grayscale corresponding to the second curve segment is equal to the brightness of the corresponding grayscale in the reference gamma curve.

[0077] It should be noted that the first light-emitting chip includes multiple grayscales. The higher the grayscale, the higher the grayscale light-emitting duty cycle, and the longer the applied current. Correspondingly, the lower the grayscale, the lower the grayscale light-emitting duty cycle, and the shorter the applied current.

[0078] As shown in FIG7 , an embodiment of the present disclosure provides a relationship curve diagram between grayscale and brightness in a first light-emitting chip. The relationship curve diagram is used to characterize the correspondence between different grayscales and brightness. FIG7 includes a first curve segment, a second curve segment, and a third curve segment.

[0079] The relationship curve between different grayscales and brightness in the first light-emitting chip may include a first curve segment and a second curve segment, wherein the first curve segment is connected to the second curve segment. The curve formed by the third curve segment and the second curve segment is a reference gamma curve.

[0080] It should be noted that when the first light-emitting chip operates in the PWM drive mode only and the control unit does not control the first light-emitting chip to emit light, the first light-emitting component is in a default light-emitting mode. In this default light-emitting mode, the relationship between the grayscale and brightness of the first light-emitting component satisfies the reference gamma curve. Specifically, in this case, the grayscale and brightness relationship curve of the first light-emitting component overlaps with the third and second curve segments in Figure 7.

[0081] Exemplarily, the reference gamma curve is one of gamma curve 2.2 or gamma curve 2.8. Both gamma curve 2.2 and gamma curve 2.8 are industry conventions in the field of display technology. The reference gamma curve may also be a gamma curve of other industry standards, which is not limited in this disclosure.

[0082] In some embodiments, the control unit 620 is configured to provide a first PWM signal to the first light-emitting chip, so that a relationship curve between grayscale and brightness in the first light-emitting chip includes a first curve segment and a second curve segment.

[0083] The first PWM signal is used to cause the emission duty cycle of the first light-emitting chip at a first target grayscale to be greater than the emission duty cycle of the corresponding grayscale in the reference gamma curve, and to cause the emission duty cycle of the first light-emitting chip at a second target grayscale to be equal to the emission duty cycle of the corresponding grayscale in the reference gamma curve. The first target grayscale corresponds to the grayscale corresponding to the first curve segment, and the second target grayscale corresponds to the grayscale corresponding to the second curve segment.

[0084] When the control unit 620 does not control the first light-emitting chip to emit light, the first target grayscale and the second target grayscale cannot completely excite the corresponding phosphor in the first phosphor portion, resulting in display problems.

[0085] Specifically, the first target grayscale and the second target grayscale can be determined by the following steps: the control unit 620 determines the first target grayscale and the second target grayscale based on the lighting time of the grayscale corresponding to the first curve segment and the second curve segment and the full lighting time of the corresponding phosphor in the first fluorescent part.

[0086] The grayscale lighting time is the default grayscale lighting time when the control unit 620 does not control the first light-emitting chip to emit light.

[0087] Exemplarily, if the lighting time of the grayscale corresponding to the first curve segment and the second curve segment is less than the full lighting time of the corresponding phosphor in the first fluorescent portion, the grayscale is determined to be the target grayscale. After determining that the grayscale is the target grayscale, the control unit 620 can determine whether the grayscale is the first target grayscale or the second target grayscale based on the curve segment to which the grayscale belongs. For example, if the grayscale belongs to the grayscale corresponding to the first curve segment, the grayscale is the first target grayscale. If the grayscale belongs to the grayscale corresponding to the second curve segment, the grayscale is the second target grayscale.

[0088] As can be seen from the above description, the lighting time of the first target grayscale and the second target grayscale are both shorter than the full lighting time of the phosphor in their respective first phosphor sections. This means that the phosphor is not fully excited, and grayscale transition anomalies may occur. Therefore, brightness compensation is required for the first target grayscale and the second target grayscale, ensuring that the luminance of the first target grayscale and the second target grayscale is sufficient to excite their respective phosphors. For example, the first target grayscale and the second target grayscale can also be described as grayscales to be compensated.

[0089] As a possible implementation manner, the control unit 620 is configured to provide the same current to the first light-emitting chip at each gray level.

[0090] In some embodiments, the control unit 620 is configured to determine the emission duty cycle of the first light-emitting chip at the first target grayscale based on the expected emission brightness of the phosphor corresponding to the first target grayscale in the first phosphor portion.

[0091] The expected luminous brightness of the phosphor can be determined based on a curve showing the relationship between the luminous intensity of the phosphor and time. The actual luminous brightness of the phosphor is the actual luminous brightness of the phosphor when the control unit 620 does not control the first light-emitting chip to emit light.

[0092] Exemplarily, the configuration unit 620 determines the light-emitting duty ratio of the first light-emitting chip at the first target gray scale based on the lighting time t.

[0093] The duty cycle is the ratio of the lighting time to the total time. Therefore, if the lighting time t is known, the duty cycle of the first light-emitting chip at the first target grayscale can be determined.

[0094] For example, Figure 8 shows a luminous waveform diagram of another phosphor provided by the present disclosure. Figure 8a shows the relationship between the luminous intensity of the phosphor and time when the control unit 620 is not controlling the first chip to emit light. The ordinate of Figure 8a represents the luminous intensity of the phosphor when the excitation light source emits brightness, and the abscissa represents time.

[0095] If the excitation light source's excitation duration is less than the phosphor's onset time, as shown in Figure 8a, the phosphor cannot reach its predicted luminous intensity, E(max), causing the phosphor's onset process to end prematurely and its decay process to begin prematurely. If the excitation light source's excitation duration is equal to or greater than the phosphor's onset time, the predicted luminous intensity is the area of ​​parts a+b+d in Figure 8a, which can be expressed as t0*Emax using the corresponding functional relationship.

[0096] However, because the excitation light source's excitation time is shorter than the phosphor's on-time, the phosphor fails to reach the predicted luminous intensity E(max) and only reaches the actual luminous intensity E(t0). Therefore, the actual luminous brightness is t0*E(t0).

[0097] Furthermore, when the control unit 620 does not change the current value provided to the first light-emitting chip in the grayscale, and the expected luminance of the phosphor is equal to the actual luminance of the phosphor, the following corresponding relationship exists: t*E(t)=t0*E(max).

[0098] Function E represents the curve plotting the phosphor's luminous intensity versus time, t0 represents the actual on-time when the control unit 620 is not controlling the first light-emitting chip, and E(max) represents the expected luminous intensity of the phosphor. Assuming the control unit 620 does not change the current supplied to the first light-emitting chip at each grayscale, all three of these conditions are known. Therefore, the on-time t at which the phosphor reaches the expected luminous brightness can be determined. This on-time t also represents the time after compensation for the first target grayscale.

[0099] As shown in Figure 8b, the ordinate represents the luminous intensity of the phosphor when the excitation light source emits brightness, and the abscissa represents time. Figure 8b shows the phosphor's lighting waveform when the lighting time is t. At lighting time t, the actual luminous intensity of the phosphor is the sum of the components a' and b', which is equal to the components a', b', and d in Figure 8a.

[0100] As a possible implementation manner, the control unit 620 is configured to provide a first current to the first light-emitting chip at each first target grayscale, and provide a second current to the first light-emitting chip at each second target grayscale.

[0101] The first current is greater than the second current, the first current is not completely the same for different first target gray levels, and the second current is the same for all second target gray levels.

[0102] It should be noted that the actual luminous intensity of the phosphor is positively correlated with the current provided to the first light-emitting chip at the grayscale by the control unit 620. Therefore, the control unit 620 can determine the actual luminous intensity of the phosphor based on the current value provided to the first light-emitting chip at the grayscale.

[0103] The current value provided by the control unit 620 to the first light-emitting chip in the grayscale is related to the module specifications of the first light-emitting component, which corresponds to a fixed current value. This fixed current value is also the basic operating current of the first light-emitting component under the PWM signal.

[0104] When the control unit 620 determines the current value provided to the first light-emitting chip at the grayscale, the actual luminous intensity E(t0) of the phosphor can be determined according to the positive correlation.

[0105] As can be seen from the above, the current provided by the control unit 620 for the first light emission at the grayscale is used to represent the actual light emission intensity of the phosphor.

[0106] In some embodiments, the control unit 620 is configured to determine to provide the first current to the first light-emitting chip at each first target gray level based on the expected luminance of the phosphor in the first phosphor portion corresponding to the first target gray level.

[0107] It should be noted that the actual luminous brightness of the phosphor is the actual luminous brightness of the phosphor when the control unit 620 does not control the first light-emitting chip to emit light.

[0108] Specifically, the expected luminous brightness of the phosphor can be determined based on a curve showing the relationship between the luminous intensity of the phosphor and time.

[0109] For example, Figure 9 shows a luminous waveform diagram of another phosphor provided by the present disclosure. Figure 9a shows the relationship between the luminous intensity of the phosphor and time when the control unit 620 is not controlling the first chip to emit light. The ordinate of Figure 9a represents the luminous intensity of the phosphor when the excitation light source emits brightness, and the abscissa represents time.

[0110] As shown in Figure 9(a), if the excitation light source's excitation duration is shorter than the phosphor's onset time, the phosphor cannot reach its predicted luminous intensity, E(max). This causes the phosphor's onset process to end prematurely and its decay process to begin prematurely. If the excitation light source's excitation duration is greater than or equal to the phosphor's onset time, the predicted luminous intensity should be t1*Emax, which is equal to t0*Emax in Figure 8(a).

[0111] However, because the excitation light source's excitation time is shorter than the phosphor's on-time, the phosphor fails to reach the predicted luminous intensity E(max) and only reaches the actual luminous intensity E(t1). Therefore, the actual luminous brightness is t1*E(t1).

[0112] Furthermore, when the expected luminous brightness of the phosphor is equal to the actual luminous brightness of the phosphor, the following corresponding relationship exists: t1*E1(t1)=t0*E(max).

[0113] Function E1 is a curve plotting the phosphor's luminous intensity versus time, t0 is the actual on-time when the control unit 620 is not controlling the first light-emitting chip, and E(max) is the estimated luminous intensity of the phosphor. In this case, the relationships between these three are known. Therefore, the on-time t1 at which the phosphor reaches the estimated luminous brightness can be determined. This on-time t1 is also the time after compensation for the first target grayscale.

[0114] For example, the configuration unit 620 may determine the light emission duty ratio of the first chip at the gray level based on the lighting time t1.

[0115] The lighting time t1 is the time it takes for the phosphor to reach the expected luminance, and the duty cycle is the ratio of the lighting time to the total time. Therefore, if the lighting time t1 is known, the duty cycle of the first light-emitting chip at the grayscale can be determined.

[0116] When it is calculated that the actual luminous intensity of the phosphor reaches the expected luminous intensity E(max), the current value provided by the control unit 620 to the first light-emitting chip in the grayscale can be determined.

[0117] As can be seen from the above description, the current value can be determined according to the luminous intensity of the phosphor.

[0118] As shown in Figure 9b, the y-axis represents the luminous intensity of the phosphor when the excitation light source emits the same brightness, and the abscissa represents time. Figure 9b shows the phosphor's lighting waveform when the lighting time is t1. At time t1, the actual luminance of the phosphor is equal to the predicted luminance.

[0119] It should be noted that, in the current case, the duty cycle of each grayscale in the first target grayscale may be different. Moreover, the actual luminous brightness of each grayscale in the first target grayscale may also be different. Therefore, the first current is not completely the same for different first target grayscales.

[0120] In some embodiments, the control unit 620 is configured to provide a second PWM signal to the first light-emitting chip, so that a relationship curve between grayscale and brightness in the first light-emitting chip includes a first curve segment and a second curve segment.

[0121] The second PWM signal is used to make the emission duty cycle of the first light-emitting chip at a first target grayscale equal to the emission duty cycle of the corresponding grayscale on the reference gamma curve; and to make the emission duty cycle of the first light-emitting chip at a second target grayscale equal to the emission duty cycle of the corresponding grayscale on the reference gamma curve. The first target grayscale belongs to the grayscale corresponding to the first curve segment, and the second target grayscale belongs to the grayscale corresponding to the second curve segment.

[0122] As a possible implementation, the control unit 620 is configured to provide a first current to the first light-emitting chip at each first target grayscale and provide a second current to the first light-emitting chip at each second target grayscale, wherein the first current is greater than the second current.

[0123] The first current is different for different first target gray levels.

[0124] It should be noted that when the duty cycle of each first target grayscale is the same, the first current provided by the control unit to the first light-emitting chip at each first target grayscale is different, so the relationship curve between the luminous intensity and time of the phosphor in the first fluorescent part corresponding to each first target grayscale is different.

[0125] Exemplarily, when the duty cycles of the first target grayscales are the same, the actual luminous intensity and the expected luminous intensity of the phosphor have the following functional relationship: Ei(t0)=E(max).

[0126] Here, i represents the grayscale number. For example, E1 is the relationship between the luminous intensity and time for grayscale 1. t0 is the lighting time of the phosphor. For example, E1(t0) = E(max) indicates that the predicted luminous intensity of the phosphor reaches the actual luminous intensity when grayscale 1 is lit at time t0.

[0127] In the present case, the curve function Ei of the phosphor's luminous intensity and time is a known condition. Therefore, the control unit can determine the first current value provided to the first light-emitting chip at the first target grayscale corresponding to the phosphor according to the actual luminous intensity of the phosphor.

[0128] It should be understood that the relationship curves between the luminous intensity and time of the phosphor in the first phosphor portion corresponding to each first target grayscale are all different. Therefore, the first current is different for different first target grayscales.

[0129] As a possible implementation, the control unit 620 is configured to provide a first current to the first light-emitting chip at each first target grayscale and provide a second current to the first light-emitting chip at each second target grayscale, wherein the first current is greater than the second current.

[0130] The first current is the same for each first target gray scale.

[0131] Exemplarily, the first current is a first current with a relatively large current value. The control unit provides the first current to the first light-emitting chip for each first target grayscale for a relatively short period of time, significantly shorter than the grayscale's lighting duration. When the control unit provides the first current value to the first light-emitting chip for each first target grayscale, the luminous intensity of the phosphor corresponding to each first target grayscale can be quickly increased to a predetermined luminous intensity. Consequently, the phosphor's decay process is prevented from offsetting the rapid lighting process.

[0132] It should be noted that in the above process, the actual luminous intensity of the phosphor is relatively high. Therefore, to ensure normal grayscale transition, the luminous duty cycle of the first light-emitting chip at the first target grayscale is small and consistent with the luminous duty cycle of the corresponding grayscale in the reference gamma curve.

[0133] In some embodiments, the control unit 620 is configured to provide a PAM signal to the first light-emitting chip.

[0134] The PAM signal is used to cause a grayscale-brightness relationship curve of the first light-emitting chip to include a first curve segment and a second curve segment, wherein the grayscale corresponding to the first curve segment is smaller than the grayscale corresponding to the second curve segment. The brightness of the grayscale corresponding to the first curve segment is greater than the brightness of the corresponding grayscale in the reference gamma curve, and the brightness of the grayscale corresponding to the second curve segment is equal to the brightness of the corresponding grayscale in the reference gamma curve.

[0135] It should be noted that the display device provided in the present disclosure can be driven in a PWM drive mode or a PAM drive mode. When the control unit 620 provides a PWM signal, such as a first PWM signal and a second PWM signal, to the first light-emitting chip, the display device is driven in a PWM drive mode. When the control unit 620 provides a PAM signal to the first light-emitting chip, the display device is driven in a PAM drive mode.

[0136] As a possible implementation manner, the control unit 620 is configured to provide a first current to the first light-emitting chip at each first target grayscale, and provide a second current to the first light-emitting chip at each second target grayscale.

[0137] The first target grayscale belongs to the grayscale corresponding to the first curve segment, the second target grayscale belongs to the grayscale corresponding to the second curve segment, the first current is different for different first target grayscales, and the second current is different for different second target grayscales.

[0138] Specifically, under the PAM driving mode, the current values ​​corresponding to each grayscale are different, while the luminous duty cycle for each grayscale is the same. Therefore, the phosphor corresponding to each grayscale in the first phosphor portion has a different luminance-time curve. When calculating the first current based on the luminance-time curve, the current values ​​corresponding to different grayscales are different. Therefore, the first current is different for different first target grayscales, and the current value corresponding to the first target grayscale is greater than the current value for the corresponding grayscale in the reference gamma curve. The process for calculating the first current is similar to the process for calculating the first current when the control unit 620 provides a PWM signal to the first light-emitting chip described above. For a detailed description, please refer to the relevant description above and will not be elaborated on here. It should be understood that the technical solutions provided by this disclosure are primarily described using a first light-emitting component emitting red light as an example. However, the technical solutions provided by this disclosure are equally applicable to other light sources. For example, the technical solutions provided by this disclosure can also be applied to a second light-emitting component emitting green light. Alternatively, they can be applied to other similar scenarios, and this disclosure is not limited thereto.

[0139] As shown in FIG10 , an embodiment of the present disclosure further provides a method for controlling a display device, which includes the following steps:

[0140] S101: Determine light-emitting parameters of a first light-emitting chip.

[0141] In which, the luminous parameters are used to make the relationship curve between grayscale and brightness in the first light-emitting chip include a first curve segment and a second curve segment, the grayscale corresponding to the first curve segment is less than the grayscale corresponding to the second curve segment; the brightness of the grayscale corresponding to the first curve segment is greater than the brightness of the corresponding grayscale in the reference gamma curve, and the brightness of the grayscale corresponding to the second curve segment is equal to the brightness of the corresponding grayscale in the reference gamma curve, and the reference gamma curve is one of gamma curve 2.2 or gamma curve 2.8.

[0142] In some embodiments, the relationship curve between different grayscales and brightness in the first light-emitting chip is composed of a first curve segment and a second curve segment, and the first curve segment is connected to the second curve segment.

[0143] Specifically, the relationship curve between different grayscales and brightness in the first light-emitting chip is shown in FIG7 . The relationship curve is used to represent the corresponding relationship between different grayscales and brightness. FIG7 includes a first curve segment, a second curve segment, and a third curve segment.

[0144] The relationship curve between different grayscales and brightness in the first light-emitting chip may include a first curve segment and a second curve segment, wherein the first curve segment is connected to the second curve segment. The curve formed by the third curve segment and the second curve segment is a reference gamma curve.

[0145] It should be noted that when the first light-emitting chip operates in the PWM drive mode only and the control unit does not control the first light-emitting chip to emit light, the first light-emitting component is in a default light-emitting mode. In this default light-emitting mode, the relationship between the grayscale and brightness of the first light-emitting component satisfies the reference gamma curve. Specifically, in this case, the grayscale and brightness relationship curve of the first light-emitting component overlaps with the third and second curve segments in Figure 7.

[0146] Exemplarily, the reference gamma curve is one of gamma curve 2.2 or gamma curve 2.8. Both gamma curve 2.2 and gamma curve 2.8 are industry conventions in the field of display technology. The reference gamma curve may also be a gamma curve of other industry standards, which is not limited in this disclosure.

[0147] In some embodiments, the luminous parameters include PWM signal parameters; the PWM signal parameters include the luminous duty cycle of the first target grayscale, and the first target grayscale belongs to the grayscale corresponding to the first curve segment; the determination of the luminous parameters of the first light-emitting chip can be specifically implemented as follows: based on the luminous brightness and luminous intensity of the grayscale corresponding to the first target grayscale in the reference gamma curve, the luminous duty cycle of the first target grayscale is determined.

[0148] The first target grayscale belongs to the grayscale corresponding to the first curve segment.

[0149] As a possible implementation manner, the first target grayscale is determined based on the lighting time of the grayscale corresponding to the first curve segment and the full lighting time of the corresponding phosphor in the first phosphor portion.

[0150] The grayscale lighting time is the default grayscale lighting time when the control unit 620 does not control the first light-emitting chip to emit light.

[0151] For example, if the lighting time of the grayscale corresponding to the first curve segment is less than the full lighting time of the corresponding phosphor in the first fluorescent portion, the grayscale is determined to be the target grayscale. After determining that the grayscale is the target grayscale, the control unit 620 can determine whether the grayscale is the first target grayscale based on the curve segment to which the grayscale belongs. For example, if the grayscale belongs to the grayscale corresponding to the first curve segment, the grayscale is the first target grayscale.

[0152] Specifically, based on the luminous brightness and luminous intensity of the corresponding grayscale of the first target grayscale in the reference gamma curve, the relevant description of determining the luminous duty cycle of the first target grayscale can be referred to the relevant description of determining the luminous duty cycle of the first light-emitting chip at the first target grayscale above, which will not be repeated in this disclosure.

[0153] In some embodiments, the PWM signal parameters also include the current value provided by the control unit to the first light-emitting chip at the first target grayscale. Based on the above embodiment, the light-emitting parameters of the first chip are determined, which can be specifically implemented as follows: based on the light-emitting brightness of the corresponding grayscale of the first target grayscale in the reference gamma curve, and the light-emitting duty cycle of the first target grayscale, determine the current value provided by the control unit to the first light-emitting chip at the first target grayscale.

[0154] As a possible implementation manner, the above current value is not completely the same for different first target gray scales.

[0155] It should be understood that in this embodiment, the current value provided by the control unit 620 to the first light-emitting chip at the first target grayscale is the first current described above when the control unit 620 provides the first PWM signal to the first light-emitting chip. For the relevant determination process, reference can be made to the detailed description of determining the first current when the control unit 620 provides the first PWM signal to the first light-emitting chip, which is not further elaborated herein.

[0156] In some embodiments, the luminous parameters include PWM signal parameters, and the PWM signal parameters only include the current value provided by the control unit 620 to the first light-emitting chip at the first target grayscale. Determining the luminous parameters of the first light-emitting chip can be specifically implemented as follows: based on the luminous brightness and luminous duty cycle of the corresponding grayscale of the first target grayscale in the reference gamma curve, determining the current value provided by the control unit to the first light-emitting chip at the first target grayscale.

[0157] As a possible implementation manner, the current value is different for different first target gray scales.

[0158] As another possible implementation, the current value is the same for different first target gray levels.

[0159] Specifically, when the current values ​​are different for different first target grayscales, and when the current values ​​are the same for different first target grayscales, the above-mentioned current values ​​correspond to two different first currents when the control unit 620 provides the first light-emitting chip with the second PWM signal provided to the first light-emitting chip at the first target grayscale. When the current values ​​are the same for different first target grayscales, the current value corresponds to the larger first current described above in the description of the second PWM signal. When the current values ​​are different for different first target grayscales, the current value corresponds to the other first current described above in the description of the second PWM signal. The specific description of the two first currents can be referred to the description of the second PWM signal above, and this disclosure will not elaborate on them here.

[0160] In some embodiments, the luminous parameters include PAM signal parameters, and the PAM signal parameters include the current value provided by the control unit to the first light-emitting chip at the first target grayscale. Determining the luminous parameters of the first light-emitting chip can be specifically implemented as follows: based on the luminous brightness and luminous duty cycle of the corresponding grayscale of the first target grayscale in the reference gamma curve, determining the current value provided by the control unit to the first light-emitting chip at the first target grayscale.

[0161] It should be understood that in this embodiment, the current value provided by the control unit 620 to the first light-emitting chip at the first target grayscale is the first current described above when the control unit 620 provides a PAM signal to the first light-emitting chip. For the relevant determination process, reference can be made to the detailed description of determining the first current when the control unit 620 provides a PAM signal to the first light-emitting chip, which is not further elaborated herein.

[0162] S102: Control the first light-emitting chip to emit light based on the light-emitting parameters.

[0163] In some embodiments, the control unit 620 controls the first light-emitting chip to emit light based on the light-emitting duty cycle of the first target grayscale in the light-emitting parameters and / or the current value provided to the first light-emitting chip at the first target grayscale.

[0164] Exemplarily, when the luminous parameters include PWM signal parameters and the PWM signal parameters only include the luminous duty cycle of the first target grayscale, the control unit 620 adjusts the duty cycle of the first target grayscale in the first light-emitting chip to the luminous duty cycle of the first target grayscale in the luminous parameters, without changing the current value provided to the first light-emitting chip at the first target grayscale, so that the relationship curve between the grayscale and the brightness in the first light-emitting chip includes a first curve segment and a second curve segment, and the brightness of the grayscale corresponding to the first curve segment is greater than the brightness of the corresponding grayscale in the reference gamma curve.

[0165] In this way, by making the brightness of the grayscale corresponding to the first curve segment in the first light-emitting chip greater than the brightness of the corresponding grayscale in the reference gamma curve, and the brightness of the grayscale corresponding to the second curve segment is equal to the brightness of the corresponding grayscale in the reference gamma curve, it is ensured that the phosphor can be fully excited during the color conversion process, thereby making the screen display normal.

[0166] Some embodiments of the present disclosure provide an electronic device comprising: a display, at least one processor, and a memory communicatively connected to the at least one processor. The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the display device control method of the above-described embodiment.

[0167] Some embodiments of the present disclosure also provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium), which stores computer program instructions. When the computer program instructions are run on a computer (e.g., an electronic device), the computer (e.g., an electronic device) executes the method for controlling a display device as described in any of the above embodiments.

[0168] Exemplarily, the above-mentioned computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes, etc.), optical disks (e.g., CDs (Compact Disks), DVDs (Digital Versatile Disks), etc.), smart cards, and flash memory devices (e.g., EPROMs (Erasable Programmable Read-Only Memory), cards, sticks, or key drives, etc.). The various computer-readable storage media described in the present disclosure may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0169] Some embodiments of the present disclosure further provide a computer program product, for example, stored on a non-transitory computer-readable storage medium. The computer program product includes computer program instructions that, when executed on a computer (e.g., an electronic device), cause the computer to execute the display device control method described in the above embodiments.

[0170] Some embodiments of the present disclosure further provide a computer program. When the computer program is executed on a computer (eg, an electronic device), the computer program enables the computer to execute the control method of the display device as described in the above embodiments.

[0171] The beneficial effects of the above-mentioned computer-readable storage medium, computer program product and computer program are the same as the beneficial effects of the control method of the display device described in some of the above-mentioned embodiments, and are not repeated here.

[0172] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in the present disclosure should be included within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A display device, wherein: include: A display substrate, the display substrate comprising a first light-emitting assembly, the first light-emitting assembly comprising a first light-emitting chip and a first fluorescent portion at least located on a light-emitting side of the first light-emitting chip; a control unit configured to: control the first light-emitting chip to emit light, so that a relationship curve between grayscale and brightness in the first light-emitting chip includes a first curve segment and a second curve segment, and the grayscale corresponding to the first curve segment is smaller than the grayscale corresponding to the second curve segment; The brightness of the grayscale corresponding to the first curve segment is greater than the brightness of the corresponding grayscale in the reference gamma curve, and the brightness of the grayscale corresponding to the second curve segment is equal to the brightness of the corresponding grayscale in the reference gamma curve, and the reference gamma curve is one of gamma curve 2.2 and gamma curve 2.

8.

2. The display device according to claim 1, wherein The relationship curve between different grayscales and brightness in the first light-emitting chip is composed of the first curve segment and the second curve segment, and the first curve segment is connected to the second curve segment.

3. The display device according to claim 1, wherein The control unit is configured to: provide a first PWM signal to the first light-emitting chip; the first PWM signal is used to make the light-emitting duty cycle of the first light-emitting chip at the first target grayscale greater than the light-emitting duty cycle of the corresponding grayscale in the reference gamma curve; making the light-emitting duty cycle of the first light-emitting chip at the second target grayscale equal to the light-emitting duty cycle of the corresponding grayscale in the reference gamma curve; The first target grayscale belongs to the grayscale corresponding to the first curve segment, and the second target grayscale belongs to the grayscale corresponding to the second curve segment.

4. The display device according to claim 3, wherein The control unit is configured to provide the same current to the first light-emitting chip at each gray level.

5. The display device according to claim 3, wherein The control unit is configured to provide a first current to the first light-emitting chip at each first target grayscale, and provide a second current to the first light-emitting chip at each second target grayscale, wherein the first current is greater than the second current. The display device according to claim 5 , wherein: The first current is not completely the same for different first target grayscales; The second current is the same for each second target gray level.

7. The display device according to claim 1, wherein The control unit is configured to: provide a second PWM signal to the first light-emitting chip; the second PWM signal is used to make the light-emitting duty cycle of the first light-emitting chip at the first target grayscale equal to the light-emitting duty cycle of the corresponding grayscale on the reference gamma curve; making the light-emitting duty cycle of the first light-emitting chip at the second target grayscale equal to the light-emitting duty cycle of the corresponding grayscale on the reference gamma curve; The control unit is configured to: provide a first target gray level to the first light emitting chip current, providing a second current to the first light-emitting chip at each second target grayscale, wherein the first current is greater than the second current; The first target grayscale belongs to the grayscale corresponding to the first curve segment, and the second target grayscale belongs to the grayscale corresponding to the second curve segment.

8. The display device according to claim 7, wherein: The first current is different for different first target gray levels.

9. The display device according to claim 7, wherein: The first current is the same for each of the first target gray levels.

10. The display device according to claim 1, wherein The control unit is configured to: provide a PAM signal to the first light-emitting chip, wherein the PAM signal is used to make the relationship curve between grayscale and brightness in the first light-emitting chip include a first curve segment and a second curve segment, and the grayscale corresponding to the first curve segment is smaller than the grayscale corresponding to the second curve segment; The brightness of the grayscale corresponding to the first curve segment is greater than the brightness of the corresponding grayscale in the reference gamma curve, and the brightness of the grayscale corresponding to the second curve segment is equal to the brightness of the corresponding grayscale in the reference gamma curve.

11. The display device according to claim 10, wherein: The control unit is configured to: provide a first current to the first light emitting chip at each first target grayscale, and provide a second current to the first light emitting chip at each second target grayscale; The first target grayscale belongs to the grayscale corresponding to the first curve segment, the second target grayscale belongs to the grayscale corresponding to the second curve segment, the first current is different for different first target grayscales, and the second current is different for different second target grayscales.

12. The display device according to any one of claims 1 to 11, wherein: The relationship between the grayscale and brightness of the first light-emitting component satisfies the reference gamma curve.

13. The display device according to any one of claims 1 to 11, wherein: The first light-emitting component emits red light.

14. The display device according to claim 13, wherein: The first light-emitting chip is a blue light chip, and the first fluorescent portion is used to convert light emitted by the first light-emitting chip into red light.

15. The display device according to claim 13, wherein The display substrate includes a second light-emitting component, the second light-emitting component emits green light, the second light-emitting component includes a second light-emitting chip and a second fluorescent portion located at least on a light-emitting side of the second light-emitting chip, the second light-emitting chip is a blue light chip, and the second fluorescent portion is used to convert the light emitted by the second light-emitting chip into green light; The display substrate includes a third light-emitting chip, and the third light-emitting chip emits blue light; Wherein, the display substrate includes pixels arranged in an array, and one of the pixels includes the first A light-emitting component, the second light-emitting component and the third light-emitting chip.

16. A method for controlling a display device, wherein: A control unit used in the display device according to claims 1 to 15, comprising: Determining light-emitting parameters of a first light-emitting chip; wherein the light-emitting parameters are configured to cause a grayscale-brightness curve of the first light-emitting chip to include a first curve segment and a second curve segment, wherein the grayscale corresponding to the first curve segment is smaller than the grayscale corresponding to the second curve segment; wherein the brightness of the grayscale corresponding to the first curve segment is greater than the brightness of the corresponding grayscale in a reference gamma curve, and the brightness of the grayscale corresponding to the second curve segment is equal to the brightness of the corresponding grayscale in the reference gamma curve, wherein the reference gamma curve is one of gamma curve 2.2 or gamma curve 2.8; Based on the light-emitting parameters, the first light-emitting chip is controlled to emit light.

17. The method according to claim 16, wherein The relationship curve between different grayscales and brightness in the first light-emitting chip is composed of the first curve segment and the second curve segment, and the first curve segment is connected to the second curve segment.

18. The method according to claim 16, wherein The light-emitting parameters include PWM signal parameters; the PWM signal parameters include a light-emitting duty cycle of the first target grayscale, and the first target grayscale belongs to the grayscale corresponding to the first curve segment; The determining of the light-emitting parameters of the first light-emitting chip includes: The light emission duty ratio of the first target gray scale is determined based on the light emission brightness and light emission intensity of the gray scale corresponding to the first target gray scale in the reference gamma curve.

19. The method according to claim 18, wherein The PWM signal parameters further include a current value provided by the control unit to the first light-emitting chip at the first target grayscale; The determining of the light emitting parameters of the first light emitting chip further includes: The control unit determines a current value provided to the first light-emitting chip at the first target grayscale based on the light emitting brightness of the grayscale corresponding to the first target grayscale in the reference gamma curve and the light emitting duty cycle of the first target grayscale.

20. The method according to claim 19, wherein The current values ​​are not completely the same for different first target gray levels.

21. The method according to claim 16, wherein The light-emitting parameters include PWM signal parameters; the PWM signal parameters are current values ​​provided by the control unit to the first light-emitting chip at the first target grayscale, and the first target grayscale belongs to the grayscale corresponding to the first curve segment; The determining of the light-emitting parameters of the first light-emitting chip includes: Based on the luminance and luminous duty cycle of the grayscale corresponding to the first target grayscale in the reference gamma curve, the control unit determines the luminous intensity of the first light-emitting chip at the first target grayscale. Provided current value.

22. The method according to claim 21, wherein The current value is different for different first target gray levels.

23. The method according to claim 21, wherein The current value is the same for different first target gray levels.

24. The method according to claim 16, wherein The light-emitting parameters include PAM signal parameters; the PAM signal parameters include a current value provided by the control unit to the first light-emitting chip at the first target grayscale, and the first target grayscale belongs to the grayscale corresponding to the first curve segment; The determining of the light-emitting parameters of the first light-emitting chip includes: Based on the luminance and duty cycle of the grayscale corresponding to the first target grayscale in the reference gamma curve, the control unit determines the current value provided to the first light-emitting chip at the first target grayscale, and the current value is different for different first target grayscales.

25. An electronic device, wherein: include: A display, at least one processor, and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the control method of the display device described in any one of claims 16 to 24.

26. A computer-readable storage medium, wherein: The computer-readable storage medium stores computer program instructions, and the computer instructions are used to enable the electronic device to execute the control method of the display device according to any one of claims 16 to 24.

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