Display device and display method

Abstract

A display device (200) and a display method can be applied to the technical field of display. The display device (200) comprises: a display panel (210) comprising a plurality of display areas; a brightness compensation unit (230) configured to compensate a first power voltage according to a first distance and a second distance to obtain a second power voltage for a target display area; and a voltage source (220) configured to output the second power voltage to supply power for the display panel (210) in a case that the display panel (210) is in a local display mode.

Description

Display device and display method TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, and in particular, to a display device and a display method. BACKGROUND

[0002] Flexible OLED (organic light-emitting diode) display technology makes it possible to realize a foldable display screen. LTPO (Low Temperature Polycrystalline Oxide) driving technology can adaptively adjust the refresh rate of an OLED screen, which can significantly reduce the energy consumption of the OLED screen while maintaining excellent display effects. Therefore, the LTPO driving technology is widely used to drive a foldable screen based on flexible OLED.

[0003] However, for an LTPO (Low Temperature Polycrystalline Oxide) 2.0 display module, when the foldable screen is in different folding states by using the LTPO driving technology, the display brightness of the foldable screen in different folding states is inconsistent, which seriously affects the user experience.

[0004] SUMMARY

[0005] Therefore, the present disclosure provides a display device and a display method.

[0006] According to an aspect of the present disclosure, a display device is provided, comprising: a display panel comprising a plurality of display areas; a brightness compensation unit configured to compensate a first power voltage to obtain a second power voltage for a target display area according to a first distance and a second distance, wherein the target display area is at least one display area of the plurality of display areas that displays in a local display mode, the first distance is a distance from a first center position of the plurality of display areas to an output end of a voltage source in a full-screen display mode, the second distance is a distance from a second center position of the target display area to the output end of the voltage source in the local display mode, the first power voltage is used to power the display panel in the full-screen display mode, and a compensation amount for compensating the first power voltage is determined by a ratio between the first distance and the second distance; and the voltage source configured to output the second power voltage to power the display panel when the display panel is in the local display mode.

[0007] According to another aspect of the present disclosure, a display method applied to the display device is provided, comprising: compensating a first power voltage according to a first distance and a second distance to obtain a second power voltage for a target display area, wherein the target display area is at least one display area of a plurality of display areas included in the display panel and displayed in a local display mode, the first distance is a distance from a first center position of the plurality of display areas to an output end of a voltage source in a full screen display mode, the second distance is a distance from a second center position of the target display area to the output end of the voltage source in the local display mode, the first power voltage is used to power the display panel in the full screen display mode, and a compensation amount for compensating the first power voltage is determined according to a ratio between the first distance and the second distance; and outputting the second power voltage to power the display panel in the local display mode. BRIEF DESCRIPTION OF DRAWINGS

[0008] The accompanying drawings are used to better understand the present scheme and do not limit the present disclosure. Among them:

[0009] FIG. 1A shows a schematic diagram of display brightness of a display panel in a full screen display mode;

[0010] FIG. 1B shows a schematic diagram of display brightness of a display panel in a first local display mode;

[0011] FIG. 1C shows a schematic diagram of display brightness of a display panel in a second local display mode;

[0012] FIG. 2 shows a structural schematic diagram of a display device according to an embodiment of the present disclosure;

[0013] FIG. 3 shows a schematic diagram of an equivalent circuit of a display panel in different display modes;

[0014] FIG. 4 shows a relationship diagram between display brightness at a center position and a distance from the center position to an output end of a voltage source when the display panel is in different display modes;

[0015] FIG. 5 shows a power voltage output by a voltage source for powering a display panel in different display modes according to an embodiment of the present disclosure;

[0016] FIG. 6 shows a power voltage output by a voltage source for powering a display panel in different display modes according to another embodiment of the present disclosure;

[0017] FIG. 7 shows a flowchart of a display method according to an embodiment of the present disclosure; and

[0018] FIG. 8 shows a flowchart of a display method according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0019] To make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part but not all of the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present disclosure. It should be noted that throughout the drawings, the same elements are denoted by the same or similar reference numerals. In the following description, some specific embodiments are used only for the purpose of description and should not be understood as any limitation on the present disclosure, but only as an example of the embodiments of the present disclosure. When it is possible to cause confusion to the understanding of the present disclosure, the conventional structures or configurations will be omitted. It should be noted that the shapes and sizes of the components in the drawings do not reflect the true size and ratio, but only illustrate the content of the embodiments of the present disclosure.

[0020] Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood as the general meaning understood by a person of ordinary skill in the art. The terms “first”, “second” and the like used in the embodiments of the present disclosure do not represent any order, number or importance, but are only used to distinguish different components.

[0021] In addition, in the description of the embodiments of the present disclosure, the term “connected” or “connected to” can mean that two components are directly connected, or that two components are connected via one or more other components. In addition, the two components can be connected or coupled by wired or wireless means.

[0022] For the use requirements of different application scenarios, the LTPO folding screen is based on the LTPO driving technology to design the hardware and electrically drive the configuration of the display panel, to realize the switching display of different display areas of the display panel.

[0023] For example, for a three-fold screen, i.e., a display panel including three display areas, the technical solution of the existing LTPO 2.0 module is: only in the G state, i.e., in the case that the three-fold screen is in a full-screen display mode, the display brightness of the full-screen position of the three-fold screen is calibrated. In the F state, i.e., when the three-fold screen is in a first local display mode, in the M state, i.e., when the three-fold screen is in a second local display mode, and in the G state, the calibrated brightness display data for the G state is called. At the same time, in the case that the folding screen is in different folding modes, the driving circuit for driving the folding screen is different, i.e., the driving circuit for driving the display panel in different display modes is different. Among them, when the three-fold screen is in the first local display mode, the three-fold screen displays based on any one display area. When the three-fold screen is in the second local display mode, the three-fold screen displays based on any two adjacent display areas.

[0024] Therefore, when the LTPO 2.0 display module drives the folding screen in the local display mode to switch the folding state with the calibrated brightness display data in the G state as the reference standard, the center brightness of the target display area far from the output end of the DIC (Drive Integrated Circuit, driving circuit) in the local display mode will be lower than the center brightness of the entire display area in the full-screen display mode due to the voltage drop (i.e., IR drop) of the folding screen itself. The center brightness of the target display area far from the output end of the DIC is more different from the center brightness of the entire display area in the full-screen display mode. At the same time, the center brightness of the target display area near the output end of the DIC in the local display mode will be higher than the center brightness of the entire display area in the full-screen display mode. Further, when the LTPO 2.0 display module drives the folding screen in different folding states, the display brightness of the folding screen in different folding states is inconsistent, the display details are lost, the display is distorted, and the user experience is seriously affected.

[0025] In order to make the display brightness of the folding screen in different folding states consistent, i.e., the center brightness of the target display area in the local display mode consistent with the center brightness of the entire display area in the full-screen display mode, one example detects and calibrates the center brightness of the target display area in the local display mode, configures corresponding brightness display data for the target display area in the local display mode, and thus three different brightness display data schemes are matched for the three different folding modes of the three-fold screen. Although this technical solution can ensure that the display brightness of the folding screen in different folding states is equal, each three-fold screen needs to be detected and calibrated three times, which will increase the TT (Takt Time, tact time) in the production line, i.e., the time interval between the production of each two products is increased, so that this technical solution is not feasible for mass production.

[0026] After three times of brightness detection and calibration on the tri-fold screen, the ideal display effect of the folding screen in different folding states is shown in FIGS. 1A-1C. In the example of FIGS. 1A-1C, the display brightness of the folding screen in F state, M state and G state is consistent. The folding screen can be a display panel including 3 display areas.

[0027] FIG. 1A shows a schematic diagram of the brightness displayed by the display panel in full-screen display mode. FIG. 1B shows a schematic diagram of the brightness displayed by the display panel in first partial display mode. FIG. 1C shows a schematic diagram of the brightness displayed by the display panel in second partial display mode.

[0028] As shown in FIG. 1A, the display panel is in full-screen display mode, i.e., in G state, and the display panel can realize full-screen display. In full-screen display mode, the center positions of the 3 display areas included by the display panel are the center of the whole display area 111 when the 3 display areas included by the display panel are taken as a whole. At this time, the brightness display data for full-screen display mode can be called to make the display brightness of the 3 display areas included by the display panel consistent with the center brightness of the whole display area 111.

[0029] As shown in FIG. 1B, the display panel is in first partial display mode, i.e., in F state, and the display panel can take one of the 3 display areas as a first target display area 112 to realize display in the first target display area 112. At this time, the brightness display data for first partial display mode can be called to make the display brightness of the first target display area 112 included by the display panel consistent with the center brightness of the first target display area 112. Meanwhile, the center brightness of the first target display area 112 is consistent with the center brightness of the whole display area 111.

[0030] As shown in FIG. 1C, the display panel is in second partial display mode, i.e., in M state, and the display panel can take two adjacent display areas of the 3 display areas as a second target display area 113 to realize display in the second target display area 113. At this time, the brightness display data for second partial display mode can be called to make the display brightness of the second target display area 113 included by the display panel consistent with the center brightness of the second target display area 113. Meanwhile, the center brightness of the second target display area 113 is consistent with the center brightness of the whole display area 111.

[0031] The display device and display method provided by the embodiments of the present disclosure can be applied to the field of display technology.

[0032] The display device and the display method provided by the embodiments of the present disclosure compensate for the display brightness of the LTPO folding screen in different display modes from the perspective of optimizing the EL (Electro-Luminescence) cross-voltage of the center of the LTPO folding screen in different folding states, so as to make the display brightness of the LTPO folding screen in different folding states consistent.

[0033] FIG. 2 shows a structural schematic diagram of a display device according to an embodiment of the present disclosure.

[0034] As shown in FIG. 2, the display device 200 can include a display panel 210, a voltage source 220, and a brightness compensation unit 230.

[0035] The display panel 210 can be a flexible OLED-based folding screen.

[0036] The display panel 210 can include a plurality of display areas. For example, the display panel 210 can include N display areas, and N can be an integer greater than or equal to 2. N can be, for example, 2, 3, 4, 5, 7, 9, or 10, etc.

[0037] The brightness compensation unit 230 can be configured to compensate for the first power supply voltage according to the first distance and the second distance to obtain the second power supply voltage for the target display area.

[0038] The target display area can be at least one display area in the plurality of display areas that displays in the local display mode. The first distance can be the distance from the output end of the voltage source to the first center position of the plurality of display areas in the full-screen display mode. The second distance can be the distance from the output end of the voltage source to the second center position of the target display area in the local display mode. The first power supply voltage can be used to power the display panel 120 in the full-screen display mode. The first center position of the plurality of display areas can represent the geometric center position of the entire display area when the plurality of display areas are taken as a whole. The compensation amount for compensating for the first power supply voltage is determined by the ratio between the first distance and the second distance.

[0039] For example, in the case where the display panel 210 includes 3 display areas, the target display area can be any one of the 3 display areas, or any two adjacent display areas of the 3 display areas. The first center position of the plurality of display areas can be the geometric center position of the entire display area when the 3 display areas are taken as a whole.

[0040] The voltage source 220 can be configured to output the second power supply voltage to power the display panel 210 when the display panel 210 is in the local display mode.

[0041] The first power supply voltage can be an ELVSS voltage applied to the first power supply end of the display panel 210 in the full-screen display mode. The second power supply voltage can be an ELVSS voltage applied to the first power supply end of the display panel 210 in the local display mode. The ELVDD voltage applied to the second power supply end of the display panel 210 is the same in the full-screen display mode and in the local display mode.

[0042] According to the display device provided by the embodiment of the present disclosure, the first power supply voltage is compensated by the brightness compensation unit according to the first distance and the second distance, to obtain the second power supply voltage for the target display area, the target display area is at least one display area in the local display mode in the plurality of display areas, the first distance is the distance from the output end of the voltage source to the first center position of the plurality of display areas in the full-screen display mode, the second distance is the distance from the output end of the voltage source to the second center position of the target display area in the local display mode, the first power supply voltage is used to supply power to the display panel in the full-screen display mode, and the compensation amount for compensating the first power supply voltage is determined by the ratio between the first distance and the second distance. The technical means can compensate the first power supply voltage without detecting the center brightness of the target display area in the local display mode, and obtain the second power supply that makes the display brightness in the local display mode consistent with the display brightness in the full-screen display mode. Further, the voltage source can output the second power supply voltage to supply power to the display panel in the local display mode, so that the display brightness in the local display mode is consistent with the display brightness in the full-screen display mode.

[0043] According to the display device provided by the embodiment of the present disclosure, the voltage source included in the display device can output the second power supply voltage to supply power to the display panel in the local display mode, so that the display brightness in the local display mode is consistent with the display brightness in the full-screen display mode, and the display brightness of the target display area in different local display modes is adaptively improved. Thus, the target display area in different local display modes can display better picture quality. Further, the technical problem that the center brightness of the target display area far from the output end of the DIC in the local display mode is lower than the center brightness of the entire display area in the full-screen display mode is solved, and the target display area can display better picture quality.

[0044] In FIG. 2, when the display panel 210 is in different display modes, the same set of power supply voltages is called to supply power to the display panel 210 in different display modes. The equivalent circuit of the display panel 210 in different display modes is shown in FIG. 3.

[0045] FIG. 3 shows a schematic diagram of the equivalent circuit of the display panel in different display modes.

[0046] As shown in FIG. 3, the display panel can include 3 display display areas. The total resistance of the display panel can be represented by R_X.

[0047] When the display panel is in the G state, i.e., in the full-screen display mode, the first center position Mo is the center of the overall display area 311 when the 3 display areas included by the display panel are taken as a whole. In an ideal state, the first equivalent resistance at the first center position Mo can be R_G, the center brightness at the first center position Mo can be L G , and the equivalent voltage can be U G . The equivalent voltage U G characterizes the voltage difference applied across the first center position Mo.

[0048] When the display panel is in the F state, i.e., in the first partial display mode, the second center position Fo is the center of the first target display area 312. In an ideal state, the second equivalent resistance at the second center position Fo can be R_F, the center brightness at the second center position Fo can be L F , and the equivalent voltage can be U F . The equivalent voltage U F characterizes the voltage difference applied across the second center position Fo.

[0049] When the display panel is in the M state, i.e., in the second partial display mode, the second center position Mo is the center of the second target display area 313. In an ideal state, the second equivalent resistance at the second center position Mo can be R_M, the center brightness at the second center position Mo can be L M , and the equivalent voltage can be U M . The equivalent voltage U M characterizes the voltage difference applied across the second center position Mo.

[0050] As can be known from FIG. 3, the center of the second target display area 312 is farther from the output end of the voltage source 320 than the center of the overall display area 311. Thus, theoretically, R_F is greater than R_G. Further, in the case where the ELVDD voltage applied by the voltage source to the second power supply end of the display panel is the same, U F is less than U G , and L F is less than L G . To make L G consistent with L F , the ELVSS voltage applied to the first power supply end of the display panel when the display panel is in the F state should be less than the ELVSS voltage applied to the first power supply end of the display panel when the display panel is in the G state.

[0051] The center of the second target display area 313 is closer to the output end of the voltage source 320 than the center of the whole display area 311. Thus, theoretically, R M is less than R G. Furthermore, in the case that the ELVDD voltage applied to the second power end of the display panel is the same, U M is greater than U G , L M is greater than L G . In order to make L G consistent with L M , the ELVSS voltage applied to the first power end of the display panel when the display panel is in the M state is greater than the ELVSS voltage applied to the first power end of the display panel when the display panel is in the G state.

[0052] As shown in FIG. 3, when the display panel is in different display modes, the resistance value of the equivalent resistance at the center position of the display area in different display modes is proportional to the distance from the output end of the voltage source. Thus, in the case that the voltage source outputs the same power voltage, since the greater the equivalent resistance, the greater the voltage drop from the voltage source to the display position, resulting in that in the case of displaying the same gray scale data, the farther the distance from the output end of the voltage source, the lower the display brightness, and the smaller the equivalent voltage applied across the center position. That is, when the display panel in different display modes is powered based on the first power voltage, the distance from the output end of the voltage source to the center position of the display area in different display modes is negatively related to the display brightness at the center position. When the display panel in different display modes is powered based on the first power voltage, the distance from the output end of the voltage source to the center position of the display area in different display modes is negatively related to the equivalent voltage applied across the center position. Wherein, the equivalent voltage represents the voltage difference applied across the center position.

[0053] In FIG. 1, the brightness compensation unit 130 can compensate the first power voltage to obtain the second power voltage for the target display area according to the first distance and the second distance, which can include: determining a distance ratio according to the first distance and the second distance; and obtaining the second power voltage according to the distance ratio and the first power voltage, wherein the distance ratio is negatively related to the ratio between the first power voltage and the second power voltage.

[0054] Obtaining the second power voltage according to the distance ratio and the first power voltage can include: obtaining the equivalent voltage applied across the first center position of the plurality of display areas when the display panel in the full-screen display mode is powered based on the first power voltage; and obtaining the second power voltage according to the distance ratio and the equivalent voltage.

[0055] For example, the first distance can be divided by the second distance to obtain a distance ratio. The second power supply voltage can be obtained according to the distance ratio and the equivalent voltage, and can include: multiplying the distance ratio and the equivalent voltage, then multiplying the multiplied value by a preset scaling coefficient, and adding a preset compensation constant to obtain the second power supply voltage. The preset scaling coefficient and the preset compensation constant can be selected according to actual conditions, and are not limited herein.

[0056] According to an embodiment of the present disclosure, by determining a distance ratio according to the first distance and the second distance, and obtaining the second power supply voltage according to the distance ratio and the first power supply voltage, the second power supply that makes the display brightness in the local display mode consistent with the display brightness in the full-screen display mode can be calculated faster based on formula operation without detecting the center brightness of the target display area in the local display mode.

[0057] In FIG. 1, the brightness compensation unit 130 can determine the distance ratio according to the first distance and the second distance, and can include: obtaining a first equivalent resistance at a first center position of the plurality of display areas; obtaining a second equivalent resistance at a second center position of the target display area; and determining the distance ratio according to the first equivalent resistance and the second equivalent resistance. The first equivalent resistance can be an equivalent resistance between the first center position and the output end of the voltage source. The second equivalent resistance can be an equivalent resistance between the second center position and the output end of the voltage source.

[0058] According to an embodiment of the present disclosure, the first equivalent resistance at the first center position of the plurality of display areas can be obtained, the second equivalent resistance at the second center position of the target display area can be obtained, and the distance ratio can be determined according to the first equivalent resistance and the second equivalent resistance. The ratio between the display brightness in the local display mode and the display brightness in the full-screen display mode can be calculated faster based on formula operation without detecting the center brightness of the target display area in the local display mode.

[0059] From the above analysis, in FIG. 3, when the display panel is in different display states, the equivalent resistance at the center position of the display area in different display modes is inversely proportional to the display brightness. The equivalent resistance at the center position is inversely proportional to the equivalent voltage applied at the center position. The corresponding brightness ideal model relationship is shown in formulas (1) to (4).

[0060] For example, the distance ratio for the display panel in the F state can be determined according to formula (1), and the distance ratio for the display panel in the M state can be determined according to formula (2).

[0061] According to formula (1), formula (3) can be obtained, and according to formula (2), formula (4) can be obtained.

[0062] According to formula (3) and formula (4), the relationship between the equivalent voltage and the brightness at the center position of the display panel in F state, M state and G state can be obtained. Since the center position of the display panel in different display modes is fixed, the equivalent resistance corresponding to the center position is also fixed. Therefore, the display brightness at any center position of the display panel can be represented by the relationship between the display brightness at the center position of the G state. Further, the display brightness difference between the arbitrary center position and the center position of the G state can be obtained. In order to compensate the display brightness at the arbitrary center position, the ELVSS voltage matched with the arbitrary center position can be used.

[0063] For example, the U F for the second center position of the display panel in F state can be determined according to formula (3). The U M for the second center position of the display panel in M state can be determined according to formula (4).

[0064] With the complication of display requirements, the display of the folding screen is no longer limited to the three-folded state. At this time, the display area included by the display panel 210 in FIG. 2 can be greater than 3.

[0065] FIG. 4 shows a relationship diagram between the display brightness at the center position and the distance from the output end of the voltage source when the display panel is in different display modes.

[0066] As shown in FIG. 4, the display panel includes n display areas, where n is an integer greater than 3. The horizontal coordinate is the display brightness L, and the vertical coordinate is the distance from the output end of the voltage source. The display brightness gradually decreases along the horizontal coordinate.

[0067] As can be seen from FIG. 4, the center brightness of the target display area far from the output end of the voltage source in the local display mode is lower than the center brightness LG of the entire display area in the full-screen display mode. The center brightness of the target display area close to the output end of the voltage source in the local display mode can be higher than the center brightness LG of the entire display area in the full-screen display mode. The technical solutions described above are also applicable to the display panel shown in FIG. 4.

[0068] Therefore, when the i-th target display area included by the display panel is displayed, the corresponding relationship between the ideal equivalent voltage and the display brightness at the center position of the i-th target display area is shown in formula (5) and formula (6).

[0069] where R i is the second equivalent resistance at the second center position of the i-th target display area, and Li is the display brightness at the second center position of the i-th target display area, U i is the equivalent voltage at the second center position of the i-th target display area.

[0070] Referring to the relationship between the equivalent voltage and the display brightness in formula (5) and formula (6), the calling relationship of the ELVSS voltage when displaying in any display area can be obtained.

[0071] After obtaining the second power supply voltage for the display panel in different local display modes, the voltage source 220 in FIG. 1 can call the power supply voltage for the display panel 210 in different display modes to supply power to the display panel 210 when the display panel 210 is in different display modes.

[0072] In FIG. 1, the voltage source 120 can also be configured to output the first power supply voltage to supply power to the display panel 110 when the display panel 110 is in the full-screen display mode.

[0073] According to an embodiment of the present disclosure, by using the technical means that the voltage source outputs the first power supply voltage to supply power to the display panel when the display panel is in the full-screen display mode, and the voltage source outputs the second power supply voltage to supply power to the display panel when the display panel is in the local display mode, the power supply voltage matched with the display mode can be called when the display panel is in different display modes, and the display brightness of the display panel in different display modes is ensured to be consistent. Thus, the adaptive improvement of the display brightness of the display area in different display modes is realized. The display area in each display mode can display better picture quality.

[0074] In the case where the display panel in FIG. 2 includes 3 display areas, the power supply voltage output by the voltage source 220 in FIG. 2 for supplying power to the display panel in different display modes is shown in FIG. 5.

[0075] FIG. 5 shows the power supply voltage output by the voltage source for supplying power to the display panel in different display modes according to an embodiment of the present disclosure.

[0076] As shown in FIG. 5, the horizontal coordinate is the display brightness L, and the vertical coordinate is the absolute value of the power supply voltage. The display brightness gradually decreases along the horizontal coordinate.

[0077] When the display panel 210 is in the M state, the absolute value of the second power voltage ELVSS1 for the display panel in the M state conforms to the variation rule in the curve 501. When the display panel 210 is in the G state, the absolute value of the first power voltage ELVSS2 for the display panel in the G state conforms to the variation rule in the curve 502. When the display panel 210 is in the F state, the absolute value of the second power voltage ELVSS3 for the display panel in the F state conforms to the variation rule in the curve 503.

[0078] To make the display brightness of the display panel in the M state consistent with the display brightness of the display panel in the G state, for the same display brightness, the absolute value of the second power voltage ELVSS1 for the display panel in the M state is less than the absolute value of the first power voltage ELVSS2 for the display panel in the G state. The difference between the absolute value of the second power voltage ELVSS1 and the absolute value of the first power voltage ELVSS2 can be denoted by Δ1.

[0079] To make the display brightness of the display panel in the F state consistent with the display brightness of the display panel in the G state, for the same display brightness, the absolute value of the second power voltage ELVSS3 for the display panel in the F state is greater than the absolute value of the first power voltage ELVSS2 for the display panel in the G state. The difference between the absolute value of the second power voltage ELVSS3 and the absolute value of the first power voltage ELVSS2 can be denoted by Δ2.

[0080] When the display panel is in the M state, the voltage source can output the second power voltage ELVSS1 according to the curve 501. When the display panel is in the G state, the voltage source can output the first power voltage ELVSS2 according to the curve 502. When the display panel is in the F state, the voltage source can output the second power voltage ELVSS3 according to the curve 503.

[0081] FIG. 6 shows the power voltage output by a voltage source for supplying power to a display panel in different display modes according to another embodiment of the present disclosure.

[0082] The definitions of the abscissa and the ordinate in FIG. 6 are the same as the definitions of the abscissa and the ordinate in FIG. 5, which will not be repeated here for simplicity.

[0083] As shown in FIG. 6, for the display panel in FIG. 4, when the i-1th target display area included in the display panel displays, the absolute value of the second power voltage ELVSS_i-1 for the display panel conforms to the change rule in curve 601. When the ith target display area included in the display panel displays, the absolute value of the second power voltage ELVSS_i for the display panel conforms to the change rule in curve 602. When the i+1th target display area included in the display panel displays, the absolute value of the second power voltage ELVSS_i+1 for the display panel conforms to the change rule in curve 603. When the display panel is in the full-screen display mode, the absolute value of the first power voltage ELVSS_G for the display panel in the full-screen display mode conforms to the change rule in curve 604. Wherein the distance from the second center position of the i-1th target display area to the output end of the voltage source is X_i-1, the distance from the second center position of the ith target display area to the output end of the voltage source is X_i, and the distance from the second center position of the i+1th target display area to the output end of the voltage source is X_i+1, X_i-1X_iX_i+1X_G.

[0084] In order to make the display brightness of the i-1th target display area, the display brightness of the ith target display area, and the display brightness of the i+1th target display area consistent with the display brightness of the display area of the display panel in the full-screen display mode, for the same display brightness, the absolute value of the second power voltage ELVSS_i-1 for the display panel, the absolute value of the second power voltage ELVSS_i for the display panel, and the absolute value of the second power voltage ELVSS_i+1 for the display panel are all less than the absolute value of the first power voltage ELVSS_G for the display panel in the full-screen display mode. And as the distance from the second center position to the output end of the voltage source increases, the difference between the absolute value of the second power voltage for the display panel and the absolute value of the first power voltage ELVSS_G for the display panel in the full-screen display mode becomes smaller.

[0085] The absolute value of the second power voltage ELVSS_n-1 for the display panel conforms to the variation rule in the curve 605 when the display panel includes the n-1th target display area to display. The absolute value of the second power voltage ELVSS_n for the display panel conforms to the variation rule in the curve 606 when the display panel includes the nth target display area to display. The absolute value of the second power voltage ELVSS_n+1 for the display panel conforms to the variation rule in the curve 607 when the display panel includes the n+1th target display area to display. Wherein, the distance between the second center position of the n-1th target display area and the output end of the voltage source is X_n-1, the distance between the second center position of the nth target display area and the output end of the voltage source is X_n, and the distance between the second center position of the n+1th target display area and the output end of the voltage source is X_n+1, X_G < X_n-1 < X_n < X_n+1.

[0086] In order to make the display brightness of the n-1th target display area, the display brightness of the nth target display area, and the display brightness of the n+1th target display area consistent with the display brightness of the display area of the display panel in the full screen display mode, for the same display brightness, the absolute value of the second power voltage ELVSS_n-1 for the display panel, the absolute value of the second power voltage ELVSS_n for the display panel, and the absolute value of the second power voltage ELVSS_n+1 for the display panel are all greater than the absolute value of the first power voltage ELVSS_G for the display panel in the full screen display mode. And with the increase of the distance between the second center position and the output end of the voltage source, the difference between the absolute value of the second power voltage for the display panel and the absolute value of the first power voltage ELVSS_G for the display panel in the full screen display mode is greater.

[0087] As can be seen from FIG. 4 and FIG. 6, the distance difference between the distance between the second center position of the target display area and the output end of the voltage source and X_G is positively correlated with the compensation amount for compensating the first power voltage. When the center position X_n of the target display area is less than X_G, the voltage source can output the second power voltage according to the curves 601 to 603. When the center position X_n of the target display area is greater than X_G, the voltage source can output the second power voltage according to the curves 605 to 607. When the display panel is in the full screen display mode, the voltage source can output the first power voltage ELVSS_G according to the curve 604.

[0088] It should be noted that when the display panel is in different display states, the variation rule of the voltage difference added to both ends of the center position of the display panel is the same as the variation rule of the absolute value of the power voltage added to the center position of the display panel.

[0089] In FIG. 2, the luminance compensation unit 230 is in communication connection with the control unit, and can be further configured to determine that the display panel 210 is in the local display mode in response to receiving the partition control instruction from the control unit, wherein the partition control instruction is issued by the control unit in response to the client confirming the local display mode.

[0090] In FIG. 2, the luminance compensation unit 230 is in communication connection with the control unit, and can be further configured to determine that the display panel 210 is in the full-screen display mode in response to receiving the full-screen display control instruction from the control unit.

[0091] According to the embodiments of the present disclosure, by determining that the display panel is in the local display mode in response to receiving the partition control instruction from the control unit by the luminance compensation unit, the luminance compensation unit can correctly identify the local display mode in which the display panel is in, so that the luminance compensation of the display panel in the local display mode can be automatically performed subsequently.

[0092] Based on the above display device, the embodiments of the present disclosure provide a display method. The display method will be described in detail below in combination with FIG. 7 and FIG. 8.

[0093] FIG. 7 shows a flowchart of a display method according to an embodiment of the present disclosure.

[0094] As shown in FIG. 7, the display method of this embodiment can include operation S710 to operation S7233. The display method of this embodiment can be applied to the above display device.

[0095] In operation S710, the folding posture change of the display panel is determined. For example, the folding posture change of the display panel can be determined by the control unit, and the control unit sends a control instruction to the luminance compensation unit.

[0096] In operation S720, the display mode in which the display panel is in is determined in response to receiving the control instruction from the control unit. For example, the display mode in which the display panel is in can be determined by the luminance compensation unit in response to receiving the control instruction from the control unit. The folding posture of the display panel can be determined based on the display mode.

[0097] In operation S7221, when the control instruction is a full-screen display control instruction, it is confirmed that the display panel is in the full-screen display mode. For example, the luminance compensation unit can confirm that the display panel is in the full-screen display mode when the control instruction is a full-screen display control instruction.

[0098] In operation S7222, the first power voltage is output to power the display panel in the case that the display panel is in the full-screen display mode. For example, the voltage source can output the first power voltage to power the display panel in the case that the display panel is in the full-screen display mode.

[0099] In operation S7211, it is confirmed that the display panel is in the first local display mode when the control instruction is the first partition control instruction. For example, the brightness compensation unit can be used to confirm that the display panel is in the first local display mode when the control instruction is the first partition control instruction. In the case where the display panel includes three display areas, the first local display mode can be the display mode when the display panel is in the F state. The first partition control instruction can be a control instruction for setting the display panel to the F state.

[0100] In operation S7212, the first power voltage is compensated according to the first distance and the second distance to obtain a second power voltage for the target display area in the first local display mode. For example, the brightness compensation unit can be used to compensate the first power voltage according to the first distance and the second distance to obtain a second power voltage for the target display area in the first local display mode.

[0101] In operation S7213, the second voltage source for the target display area in the first local display mode is output to power the display panel when the display panel is in the first local display mode. For example, the voltage source can be used to output the second voltage source for the target display area in the first local display mode to power the display panel when the display panel is in the first local display mode.

[0102] In operation S7231, it is confirmed that the display panel is in the second local display mode when the control instruction is the second partition control instruction. For example, the brightness compensation unit can be used to confirm that the display panel is in the second local display mode when the control instruction is the second partition control instruction. In the case where the display panel includes three display areas, the second local display mode can be the display mode when the display panel is in the M state. The second partition control instruction can be a control instruction for setting the display panel to the M state.

[0103] In operation S7232, the first power voltage is compensated according to the first distance and the second distance to obtain a second power voltage for the target display area in the second local display mode. For example, the brightness compensation unit can be used to compensate the first power voltage according to the first distance and the second distance to obtain a second power voltage for the target display area in the second local display mode.

[0104] In operation S7233, the second voltage source for the target display area in the second local display mode is output to power the display panel when the display panel is in the second local display mode. For example, the voltage source can be used to output the second voltage source for the target display area in the second local display mode to power the display panel when the display panel is in the second local display mode.

[0105] According to the display method shown in FIG. 7, the first power supply voltage can be compensated to obtain the second power supply voltage that makes the display brightness in the partial display mode consistent with the display brightness in the full-screen display mode without detecting the center brightness of the target display region in the partial display mode. Further, the voltage source can output the second power supply voltage to supply power to the display panel in the partial display mode, so that the display brightness in the partial display mode is consistent with the display brightness in the full-screen display mode.

[0106] FIG. 8 shows a flowchart of a display method according to another embodiment of the present disclosure.

[0107] As shown in FIG. 8, the display method of this embodiment can include operation S810 to operation S820. The display method of this embodiment can be applied to the display device described above.

[0108] In operation S810, the first power supply voltage is compensated according to the first distance and the second distance to obtain the second power supply voltage for the target display region. The target display region is at least one display region of a plurality of display regions included in the display panel that displays in the partial display mode. The first distance is the distance from the first center position of the plurality of display regions to the output end of the voltage source in the full-screen display mode. The second distance is the distance from the second center position of the target display region to the output end of the voltage source in the partial display mode. The first power supply voltage is used to supply power to the display panel in the full-screen display mode. The compensation amount for compensating the first power supply voltage is determined according to the ratio between the first distance and the second distance.

[0109] In operation S820, the second power supply voltage is output to supply power to the display panel in the partial display mode.

[0110] According to the embodiment of the present disclosure, for operation S810 as shown in FIG. 8, the first power supply voltage is compensated according to the first distance and the second distance to obtain the second power supply voltage for the target display region, which can include the following operations: determining the distance ratio according to the first distance and the second distance; obtaining the second power supply voltage according to the distance ratio and the first power supply voltage, wherein the distance ratio is negatively related to the ratio between the first power supply voltage and the second power supply voltage.

[0111] According to the embodiment of the present disclosure, determining the distance ratio according to the first distance and the second distance can include the following operations: obtaining the first equivalent resistance at the first center position of the plurality of display regions; obtaining the second equivalent resistance at the second center position of the target display region; and determining the distance ratio according to the first equivalent resistance and the second equivalent resistance.

[0112] According to an embodiment of the present disclosure, obtaining the second power supply voltage according to the distance ratio and the first power supply voltage can comprise: obtaining an equivalent voltage applied to both ends of the first center position of the plurality of display areas when the display panel in the full-screen display mode is powered based on the first power supply voltage; and obtaining the second power supply voltage according to the distance ratio and the equivalent voltage.

[0113] According to an embodiment of the present disclosure, the display method in FIG. 8 can further comprise: powering the display panel with the first power supply voltage when the display panel is in the full-screen display mode.

[0114] According to an embodiment of the present disclosure, the display method in FIG. 8 can further comprise: determining that the display panel is in the local display mode in response to receiving a partition control instruction from the control unit, wherein the partition control instruction is issued by the control unit in response to the client confirming the local display mode.

[0115] It should be noted that the display method part in the embodiments of the present disclosure corresponds to the display device part in the embodiments of the present disclosure, and the description of the display method part is specifically referred to the display device part, which will not be repeated here. Unless it is explicitly stated that there is an execution sequence between different operations or there is an execution sequence in the technical implementation of different operations, the execution sequence of multiple operations can not be distinguished, and multiple operations can be executed simultaneously.

[0116] The flowcharts and block diagrams in the drawings illustrate the possible implementation architecture, function and operation of the system, method and computer program product according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram can represent a module, a program segment, or a part of code, which contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions noted in the blocks can occur in different order from that shown in the drawings. For example, two blocks represented in succession can actually be executed substantially in parallel, and sometimes they can be executed in reverse order, depending on the function involved. It should also be noted that each block in the block diagram or flowchart, and the combination of blocks in the block diagram or flowchart, can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0117] Those skilled in the art can understand that the features recited in various embodiments and / or claims of the present disclosure can be combined or / and integrated in various combinations, even if such combinations are not explicitly recited in the present disclosure. In particular, the features recited in various embodiments and / or claims of the present disclosure can be combined and / or integrated in various combinations without departing from the spirit and teachings of the present disclosure. All such combinations and / or integrations fall within the scope of the present disclosure.

[0118] The above describes embodiments of the present disclosure. However, these embodiments are merely for illustrative purposes, and are not intended to limit the scope of the present disclosure. Although each embodiment is described above separately, this does not mean that the measures in various embodiments cannot be used advantageously in combination. The scope of the present disclosure is defined by the appended claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art can make various substitutions and modifications, which all fall within the scope of the present disclosure.

Claims

1. A display device comprising: a display panel comprising a plurality of display areas; a brightness compensation unit configured to compensate a first power voltage to obtain a second power voltage for a target display area according to a first distance and a second distance, wherein the target display area is at least one display area of the plurality of display areas that is displaying in a partial display mode, wherein the first distance is a distance from an output end of a voltage source to a first center position of the plurality of display areas in a full screen display mode, the second distance is a distance from the output end of the voltage source to a second center position of the target display area in the partial display mode, the first power voltage is used to power the display panel in the full screen display mode, and wherein a compensation amount used to compensate the first power voltage is determined according to a ratio between the first distance and the second distance; the voltage source configured to output the second power voltage to power the display panel when the display panel is in the partial display mode.

2. The display device according to claim 1, wherein the compensating the first power voltage to obtain the second power voltage according to the first distance and the second distance comprises: determining a distance ratio according to the first distance and the second distance; and obtaining the second power voltage according to the distance ratio and the first power voltage, wherein the distance ratio is negatively related to a ratio between the first power voltage and the second power voltage.

3. The display device of claim 2, wherein, the determining the distance ratio according to the first distance and the second distance comprises: obtaining a first equivalent resistance at the first center position of the plurality of display areas; obtaining a second equivalent resistance at the second center position of the target display area; and determining the distance ratio according to the first equivalent resistance and the second equivalent resistance.

4. The display device according to claim 2 or 3, wherein the obtaining the second power voltage according to the distance ratio and the first power voltage comprises: obtaining an equivalent voltage across the first center position of the plurality of display areas when the display panel is powered by the first power voltage in the full screen display mode; and obtaining the second power voltage according to the distance ratio and the equivalent voltage.

5. The display device according to any one of claims 1 to 4, wherein the voltage source is further configured to output the first power voltage to power the display panel when the display panel is in the full screen display mode.

6. The display device of any one of claims 1 to 5, wherein: the brightness compensation unit is communicatively connected with a control unit and is further configured to determine that the display panel is in the partial display mode in response to receiving a partition control instruction from the control unit, wherein the partition control instruction is issued by the control unit in response to a client confirming the partial display mode.

7. A display method applied to the display device of any one of claims 1 to 6, comprising: According to the first distance and the second distance, the first power supply voltage is compensated to obtain a second power supply voltage for a target display area, wherein the target display area is at least one display area of a plurality of display areas included in the display panel and displayed in a local display mode, the first distance is a distance from a first center position of the plurality of display areas to an output end of a voltage source in a full-screen display mode, the second distance is a distance from a second center position of the target display area to the output end of the voltage source in the local display mode, the first power supply voltage is used to power the display panel in the full-screen display mode, and a compensation amount for compensating the first power supply voltage is determined according to a ratio between the first distance and the second distance. In a case where the display panel is in the local display mode, the second power supply voltage is output to power the display panel.

8. The display method according to claim 7, wherein The compensation of the first power supply voltage according to the first distance and the second distance to obtain the second power supply voltage for the target display area includes: According to the first distance and the second distance, a distance ratio is determined. According to the distance ratio and the first power supply voltage, the second power supply voltage is obtained, wherein the distance ratio is negatively related to a ratio between the first power supply voltage and the second power supply voltage.

9. The display method according to claim 8, wherein The determination of the distance ratio according to the first distance and the second distance includes: A first equivalent resistance at the first center position of the plurality of display areas is obtained. A second equivalent resistance at the second center position of the target display area is obtained. According to the first equivalent resistance and the second equivalent resistance, the distance ratio is determined.

10. The display device according to claim 8 or 9, wherein The obtaining of the second power supply voltage according to the distance ratio and the first power supply voltage includes: When the display panel in the full-screen display mode is powered based on the first power supply voltage, an equivalent voltage applied across the first center position of the plurality of display areas is obtained. According to the distance ratio and the equivalent voltage, the second power supply voltage is obtained.

11. The display method according to any one of claims 7 to 10, wherein, Further includes: In a case where the display panel is in the full-screen display mode, the first power supply voltage is output to power the display panel.

12. The display method according to any one of claims 7 to 11, wherein, In response to receiving a partition control instruction from a control unit, it is determined that the display panel is in a local display mode, wherein the partition control instruction is issued by the control unit in response to a client confirming the local display mode.

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