Display panel, display device, display driving method and readable storage medium

Abstract

The invention provides a display panel, a display device, a display driving method and a readable storage medium. The display panel is provided with a plurality of gamma units, part or all of the gamma units are only connected with sub-pixels of the same color, a first voltage signal is further detected through a detection signal end, and a first reference gamma voltage and a second reference gamma voltage of the gamma units are adjusted according to a detection result of the first voltage signal. The gamma reference voltages of the sub-pixels with different colors can be dynamically compensated when the external driving voltage changes, and the display uniformity of the display panel is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel, a display device, a display driving method and a readable storage medium. Background Art

[0002] During the production and testing process, the display panel needs to be loaded on different jigs. After leaving the factory, it may be applied to different display devices. During this process, the driving voltage (ELVDD) provided by different jigs and different display devices may be different. If the display panel is compensated according to a fixed gamma voltage, the display panel that has been debugged in the test phase may have color differences or brightness after being applied to the display device, resulting in abnormal display effects. Summary of the invention

[0003] Embodiments of the present invention provide a display substrate and a display device to solve the problem of display effect fluctuation caused by driving voltage fluctuation in the existing display panel.

[0004] To solve the above problems, the present invention is achieved as follows:

[0005] In a first aspect, an embodiment of the present invention provides a display panel, wherein the display panel comprises:

[0006] Sub-pixels of multiple different colors;

[0007] a plurality of first voltage signal lines extending along a first direction and arranged along a second direction on the display panel, the first voltage signal lines being connected to the light-emitting units of the sub-pixels to provide the light-emitting units with first voltage signals for driving the light-emitting units to emit light, wherein the sub-pixels connected to each of the first voltage signal lines have the same color, and the first direction and the second direction are intersecting directions;

[0008] a plurality of gamma units, wherein the gamma units are respectively connected to a first reference gamma voltage terminal and a second reference gamma voltage terminal, and the gamma units are also connected to the sub-pixels to provide gamma voltages to the sub-pixels, and some or all of the gamma units are only connected to sub-pixels of the same color, wherein the first reference gamma voltage terminal is used to provide a first reference gamma voltage, and the second reference gamma voltage terminal is used to provide a second reference gamma voltage;

[0009] A detection signal terminal connected to the first voltage signal line and used for acquiring a first voltage signal of the sub-pixel;

[0010] A driving chip is connected to the detection signal end and the gamma unit, and is used to adjust the first reference gamma voltage and the second reference gamma voltage of the sub-pixel according to the difference between the gamma reference voltages of sub-pixels of different colors and the difference between the first voltage signal, wherein the gamma reference voltage difference is the difference between the first reference gamma voltage and the second reference gamma voltage.

[0011] In some of the embodiments, the sub-pixels of different colors include green sub-pixels, and one of the gamma units is connected only to the green sub-pixels.

[0012] In some embodiments, each of the gamma units is connected to a sub-pixel of one color, so that gamma voltages are provided to sub-pixels of different colors through different gamma units.

[0013] In some embodiments, the gamma unit includes a plurality of resistors connected in series between the first reference gamma voltage terminal and the second reference gamma voltage terminal.

[0014] In some embodiments, the sub-pixels of different colors include sub-pixels of three different colors, each sub-pixel of different colors is arranged in sequence along the first direction, and sub-pixel columns of different colors are alternately arranged in sequence along the second direction.

[0015] In a second aspect, an embodiment of the present invention provides a display device, comprising the display panel described in any one of the first aspects.

[0016] In a third aspect, an embodiment of the present invention provides a display driving method, which is applied to the display device according to the second aspect, and the method includes:

[0017] Acquire a first voltage signal of a sub-pixel of a target color;

[0018] According to the difference between the gamma reference voltage difference of the sub-pixel of the target color and the first voltage signal, the first reference gamma voltage and the second reference gamma voltage of the gamma unit corresponding to the sub-pixel of the target color are adjusted.

[0019] In a fourth aspect, an embodiment of the present invention provides a display device, wherein the display device is the display device according to the second aspect, comprising:

[0020] A detection module, used for acquiring a first voltage signal of a sub-pixel of a target color;

[0021] The driving module is used to adjust the first reference gamma voltage and the second reference gamma voltage of the gamma unit corresponding to the sub-pixel of the target color according to the difference between the gamma reference voltage difference of the sub-pixel of the target color and the first voltage signal.

[0022] In a fourth aspect, an embodiment of the present invention provides a display device, comprising a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the display driving method described in the third aspect.

[0023] In a fifth aspect, an embodiment of the present invention provides a readable storage medium, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the steps of the display driving method described in the third aspect are implemented.

[0024] The display panel provided by the embodiment of the present invention is provided with a plurality of gamma units, and some or all of the gamma units are only connected to sub-pixels of the same color. The first voltage signal is further detected by the detection signal terminal, and the first reference gamma voltage and the second reference gamma voltage of the gamma unit are adjusted according to the detection result of the first voltage signal. When the external driving voltage changes, the gamma reference voltages of sub-pixels of different colors can be dynamically compensated, thereby improving the display uniformity of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0026] Figure 1 is a schematic structural diagram of a display panel in one embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of a driving circuit of a display panel in one embodiment of the present invention;

[0028] Figure 3 is a schematic diagram of voltage signal detection in an embodiment of the present invention;

[0029] Figure 4 is another schematic diagram of a driving circuit of a display panel in an embodiment of the present invention;

[0030] Figure 5 is a flow chart of a display driving method in one embodiment of the present invention;

[0031] Figure 6 It is a schematic structural diagram of a display device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The terms "first", "second" etc. in the embodiments of the present invention are used to distinguish similar objects, and need not be used to describe a specific order or sequential order. In addition, the terms "include" and "have" and any variation thereof are intended to cover non-exclusive inclusions, for example, the process, method, system, product or equipment comprising a series of steps or units need not be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment. In addition, "and / or" is used in the present application to represent at least one of the connected objects, such as A and / or B and / or C, which represents 7 situations including single A, single B, single C, and A and B all exist, B and C all exist, A and C all exist, and A, B and C all exist.

[0034] An embodiment of the present invention provides a display panel.

[0035] like Figure 1 As shown, in some embodiments, the display panel includes a plurality of sub-pixels 101 of different colors, a plurality of first voltage signal lines 102 , a plurality of gamma units 103 and a driving chip 104 .

[0036] In an exemplary embodiment, the plurality of sub-pixels 101 of different colors may be sub-pixels 101 of three different colors, for example, sub-pixels 101 of three different colors, namely, red (PR), green (G), and blue (B).

[0037] The display panel further includes a plurality of first voltage signal lines 102, which extend along a first direction on the display panel and are arranged along a second direction. The first direction and the second direction are intersecting directions. For example, the first direction may be Figure 1 The longitudinal direction (Y direction) shown in FIG. 1 , the second direction may be Figure 1 The lateral direction (X direction) is shown in .

[0038] The first voltage signal line 102 is connected to the light-emitting unit of the sub-pixel 101 to provide the light-emitting unit with a first voltage signal for driving the light-emitting unit to emit light. Here, the first voltage signal can be an ELVDD signal, which can generally be understood as an electroluminescent high-voltage signal, or a positive signal.

[0039] Please continue reading Figure 1, the sub-pixels 101 connected to each first voltage signal line 102 have the same color, which can be understood as follows: the sub-pixels 101 connected to one first voltage signal line 102 are all red sub-pixels PR, the sub-pixels 101 connected to another first voltage signal line 102 are all blue sub-pixels B, and the sub-pixels 101 connected to another first voltage signal line 102 are all blue sub-pixels G. In some embodiments, columns of sub-pixels 101 of different colors are alternately arranged in sequence along the second direction.

[0040] In an exemplary embodiment, along Figure 1 In the first direction, the first column of sub-pixels 101 are red sub-pixels PR, the second column of sub-pixels 101 are green sub-pixels G, the third column of sub-pixels 101 are blue sub-pixels B, the fourth column of sub-pixels 101 are green sub-pixels G... and so on, with the red, green, blue and green four columns of sub-pixels 101 as a group, which are arranged alternately.

[0041] In another exemplary embodiment, along the first direction, the first column of sub-pixels 101 are red sub-pixels PR, the second column of sub-pixels 101 are green sub-pixels G, the third column of sub-pixels 101 are blue sub-pixels B, the fourth column of sub-pixels 101 are red sub-pixels PR... and so on, with the red, green and blue columns of sub-pixels 101 forming a group and arranged alternately.

[0042] like Figure 2 As shown, the display panel further includes a plurality of gamma units 103. In some embodiments, the gamma unit 103 is a resistor string, specifically including a plurality of resistors R connected in series between a first reference gamma voltage terminal and a second reference gamma voltage terminal.

[0043] Exemplarily, the gamma unit 103 corresponding to the red sub-pixel PR includes a first gamma resistor string Gamma RString_R, the gamma unit 103 corresponding to the green sub-pixel G includes a second gamma resistor string Gamma R String_G, and the gamma unit 103 corresponding to the blue sub-pixel B includes a third gamma resistor string Gamma R String_B.

[0044] The gamma unit 103 is connected to the first reference gamma voltage terminal and the second reference gamma voltage terminal, respectively. The gamma unit 103 is also connected to the sub-pixel 101 to provide a gamma voltage to the sub-pixel 101, wherein the first reference gamma voltage terminal is used to provide a first reference gamma voltage VGMP, and the second reference gamma voltage terminal is used to provide a second reference gamma voltage VGSP. Figure 2 The suffixes R\G\B in VGMP and VGSP represent red sub-pixel, green sub-pixel and blue sub-pixel respectively.

[0045] Some or all of the gamma units 103 are connected only to sub-pixels 101 of the same color.

[0046] That some gamma units 103 are only connected to sub-pixels 101 of the same color can be understood as that there is a gamma unit 103 that is only connected to sub-pixels 101 of one color, and there is a gamma unit 103 that is connected to sub-pixels 101 of multiple colors.

[0047] In an exemplary embodiment, the sub-pixels 101 of different colors include a green sub-pixel G, and one gamma unit 103 is only connected to the green sub-pixel G. Specifically, the display panel includes two gamma units 103, one of which is only connected to the green sub-pixel G, and the other gamma unit 103 is connected to the red sub-pixel PR and the blue sub-pixel B.

[0048] All gamma units 103 are only connected to sub-pixels 101 of the same color, which can be understood as each gamma unit 103 is connected to a sub-pixel 101 of one color, so that gamma voltages are provided to sub-pixels 101 of different colors through different gamma units 103. In other words, each gamma unit 103 is only connected to a sub-pixel 101 of one color.

[0049] like Figure 4 As shown, a sub-pixel 101 including three colors of red, green and blue is used as an example. During implementation, three gamma units 103 need to be set, wherein the red sub-pixel PR is connected to the same gamma unit (Gamma_R) 103, the blue sub-pixel B is connected to the same gamma unit (Gamma_B) 103, and the green sub-pixel G is also connected to the same gamma unit (Gamma_G) 103.

[0050] like Figure 4 As shown, the driving chip 104 is connected to the detection signal terminal 1041 and the gamma unit 103, and the detection signal terminal 1041 is connected to the first voltage signal line 102, and is used to obtain the first voltage signal of the sub-pixel 101. The driving chip 104 is used to adjust the first reference gamma voltage VGMP and the second reference gamma voltage VGSP of the sub-pixel 101 according to the difference △V2 between the gamma reference voltage difference of the sub-pixels 101 of different colors and the first voltage signal, as shown in FIG. Figure 3 As shown, the gamma reference voltage difference is the difference between the first reference gamma voltage VGMP and the second reference gamma voltage VGSP (△V1+△

[0051] V2).

[0052] like Figure 2 As shown, the driving chip 104 converts the acquired gamma voltage into an analog signal through a digital-to-analog converter DAC, and provides the analog signal to each sub-pixel.

[0053] An embodiment of the present invention provides a display device, comprising any one of the above display panels.

[0054] An embodiment of the present invention provides a display driving method, which is applied to the display device described above.

[0055] like Figure 5 As shown, the method includes:

[0056] Acquire a first voltage signal of a sub-pixel of a target color;

[0057] According to the difference between the gamma reference voltage difference of the sub-pixel of the target color and the first voltage signal, the first reference gamma voltage and the second reference gamma voltage of the gamma unit corresponding to the sub-pixel of the target color are adjusted.

[0058] The technical solution of this embodiment dynamically detects the first voltage signal (ELVDD) obtained by the display panel during use, and adjusts the voltages of the first reference gamma voltage VGMP and the second reference gamma voltage VGSP according to the detection result of the first voltage signal, so as to ensure that the brightness and chromaticity of the module remain unchanged on different fixtures and terminals. In this way, the ELVDD voltage is stable and is not affected by power supply quality or power supply problems.

[0059] In order to improve the optimization effect of color difference and uniformity compensation for a plurality of sub-pixels 101 of different colors, a plurality of gamma units 103 are provided in this embodiment to compensate for sub-pixels 101 of different colors.

[0060] Exemplarily, when the voltage of the first voltage signal ELVDD_R of the red sub-pixel PR changes, the voltage change value of ELVDD_R is detected and fed back to the driver chip (Driver IC) 104. The driver chip 104 compares the first voltage signal ELVDD_R of the red sub-pixel PR with the gamma reference voltage difference of the red sub-pixel PR, and accordingly adjusts the first reference gamma voltage VGMP_R and the second reference gamma voltage VGSP_R corresponding to the red sub-pixel PR to maintain the module brightness and chromaticity unchanged.

[0061] Here, the gamma reference voltage difference of the red sub-pixel 101 is a voltage difference between the first reference gamma voltage VGMP_R and the second reference gamma voltage VGSP_R of the red sub-pixel PR.

[0062] The detection and adjustment process of other color sub-pixels 101 may refer to the above process and will not be described in detail here.

[0063] An embodiment of the present invention provides a display device, the display device comprising:

[0064] A detection module, used for acquiring a first voltage signal of a sub-pixel of a target color;

[0065] The driving module is used to adjust the first reference gamma voltage and the second reference gamma voltage of the gamma unit corresponding to the sub-pixel of the target color according to the difference between the gamma reference voltage difference of the sub-pixel of the target color and the first voltage signal.

[0066] The display device of this embodiment can implement each step of the above-mentioned display driving method embodiment, and can achieve the same or similar technical effects, which will not be described in detail here.

[0067] like Figure 6 As shown, an embodiment of the present application also provides a display device, including a processor 601, a memory 602, and a program 603 or instruction stored in the memory 602 and executable on the processor. When the program 603 or instruction is executed by the processor 601, each process of the above-mentioned method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0068] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0069] The processor is a processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0070] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0071] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0072] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A display panel, characterized in that: The display panel comprises: Sub-pixels of multiple different colors; a plurality of first voltage signal lines extending along a first direction and arranged along a second direction on the display panel, the first voltage signal lines being connected to the light-emitting units of the sub-pixels to provide the light-emitting units with first voltage signals for driving the light-emitting units to emit light, wherein the sub-pixels connected to each of the first voltage signal lines have the same color, and the first direction and the second direction are intersecting directions; a plurality of gamma units, wherein the gamma units are respectively connected to a first reference gamma voltage terminal and a second reference gamma voltage terminal, and the gamma units are also connected to the sub-pixels to provide gamma voltages to the sub-pixels, and some or all of the gamma units are only connected to sub-pixels of the same color, wherein the first reference gamma voltage terminal is used to provide a first reference gamma voltage, and the second reference gamma voltage terminal is used to provide a second reference gamma voltage; A detection signal terminal connected to the first voltage signal line and used for acquiring a first voltage signal of the sub-pixel; A driving chip is connected to the detection signal end and the gamma unit, and is used to adjust the first reference gamma voltage and the second reference gamma voltage of the sub-pixel according to the difference between the gamma reference voltages of sub-pixels of different colors and the difference between the first voltage signal, wherein the gamma reference voltage difference is the difference between the first reference gamma voltage and the second reference gamma voltage.

2. The display panel according to claim 1, wherein: The sub-pixels of different colors include a green sub-pixel, and one gamma unit is connected only to the green sub-pixel.

3. The display panel according to claim 1 or 2, characterized in that: Each of the gamma units is connected to a sub-pixel of one color, so that gamma voltages are provided to sub-pixels of different colors through different gamma units.

4. The display panel according to claim 1, wherein: The gamma unit includes a plurality of resistors connected in series between the first reference gamma voltage terminal and the second reference gamma voltage terminal.

5. The display panel according to claim 1, wherein: The sub-pixels of different colors include sub-pixels of three different colors, each sub-pixel of different colors is arranged in sequence along the first direction, and sub-pixel columns of different colors are alternately arranged in sequence along the second direction.

6. A display device, characterized in that: A display panel comprising any one of claims 1 to 5.

7. A display driving method, characterized in that: Applied to the display device of claim 6, the method comprising: Acquire a first voltage signal of a sub-pixel of a target color; According to the difference between the gamma reference voltage difference of the sub-pixel of the target color and the first voltage signal, the first reference gamma voltage and the second reference gamma voltage of the gamma unit corresponding to the sub-pixel of the target color are adjusted.

8. A display device, characterized in that: The display device is the display device according to the second aspect, and the display device includes: A detection module, used for acquiring a first voltage signal of a sub-pixel of a target color; The driving module is used to adjust the first reference gamma voltage and the second reference gamma voltage of the gamma unit corresponding to the sub-pixel of the target color according to the difference between the gamma reference voltage difference of the sub-pixel of the target color and the first voltage signal.

9. A display device, characterized in that: The device comprises a processor, a memory and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction implements the steps of the display driving method as claimed in claim 7 when executed by the processor.

10. A readable storage medium, characterized in that: The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the steps of the display driving method according to claim 7 are implemented.

Images