CN110956925A - Display device, electronic equipment and method for aging compensation of display panel - Google Patents
Display device, electronic equipment and method for aging compensation of display panel Download PDFInfo
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- CN110956925A CN110956925A CN201911357890.0A CN201911357890A CN110956925A CN 110956925 A CN110956925 A CN 110956925A CN 201911357890 A CN201911357890 A CN 201911357890A CN 110956925 A CN110956925 A CN 110956925A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
- G09G2320/046—Dealing with screen burn-in prevention or compensation of the effects thereof
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Abstract
The application discloses a display device, an electronic device and a method for aging compensation of a display panel. The display device includes: the display panel is provided with a first display area and a second display area, and the pixel density of the first display area is lower than that of the second display area; the acquisition unit is arranged below the first display area and used for acquiring light emitted into the first display area; and the compensation unit is used for carrying out aging compensation on the display panel by utilizing a first parameter obtained based on the brightness acquired by the acquisition unit. The invention enables the aging compensation of the display panel of the display device to be conveniently carried out.
Description
Technical Field
The present invention relates to the field of display panel technology, and more particularly, to a display device, an electronic apparatus, and a method of performing aging compensation for a display panel.
Background
In the related art, as shown in fig. 1, an OLED (organic light emitting diode) display panel 1 is provided with a transparent display area 31 and a non-transparent display area 32. An off-screen camera 33 is placed below the transparent display area 31. The non-transparent display region 32 includes a cathode layer 13, an organic light emitting material layer 14, and an anode layer 15. The cathode layer 13 and the anode layer 15 are opaque, so that after the external/ambient light 11 is transmitted through the non-transparent display device 10, the transmitted light 16 is very little and no image can be taken, but the organic light emitting material layer 14 is capable of emitting OLED light 12 and is thus useful for display. The transparent display region 20 includes a transparent cathode layer 13 ', an organic light emitting material layer 14, and a transparent anode layer 15'. Since the transparent cathode layer 13 'and the transparent anode layer 15' are transparent, the external/ambient light 11 can be transmitted through the transparent display area 20, and thus image pickup is possible.
OLED display panels can become aged as their use time increases. The method for carrying out aging compensation in the prior art comprises the steps of measuring an aging state by adding a monitoring line on a display panel, and then carrying out manual compensation, and carrying out calculation and adjustment by using an ideal aging model, wherein the two modes are inconvenient.
Disclosure of Invention
In view of the above problems, an object of the present invention is to enable aging compensation of an OLED display panel to be conveniently performed.
According to an aspect of the present invention, there is provided a display device including:
the display panel is provided with a first display area and a second display area, and the pixel density of the first display area is lower than that of the second display area;
the acquisition unit is arranged below the first display area and used for acquiring light emitted into the first display area;
and the compensation unit is used for carrying out aging compensation on the display panel by utilizing a first parameter obtained based on the brightness acquired by the acquisition unit.
Optionally, the compensation unit comprises:
a light brightness extraction unit connected to the collection unit, collecting light brightness from the light collected by the collection unit;
and a compensation calculation processing unit connected to the light brightness extraction unit.
Optionally, the compensation calculation processing unit is configured to perform the following steps:
acquiring a first display area light brightness reference value;
determining a first ratio of the brightness of the first output acquired by the brightness acquisition to the obtained reference value of the brightness of the first display area;
based on the first ratio, a first parameter for aging compensation of the first display region is determined.
Optionally, the obtaining the reference value of the luminance of the first display region includes:
determining an attenuation ratio for the first display region based on a loss parameter for the first display region;
determining the light transmission brightness of the first display area based on the gray level of the first display area;
and dividing the determined transmission brightness by the determined attenuation ratio to obtain a first display area light brightness reference value.
Optionally, the compensation unit further comprises: and the voltage compensation circuit is connected to the compensation calculation processing unit and is used for adjusting the power supply voltage of the first display area according to the determined first parameter.
Optionally, the compensation calculation processing unit is further configured to adjust a supply voltage of the first display area according to the determined first parameter.
Optionally, the compensation calculation processing unit is further configured to:
acquiring a second display area light brightness reference value;
determining the ratio of the luminance output by the luminance extraction unit to the acquired luminance reference value of the second display area, and dividing the ratio by the pixel density ratio of the second display area to the first display area to obtain a second ratio;
and determining a second parameter for aging compensation of the second display area based on the second ratio.
Optionally, the obtaining the reference value of the luminance of the second display region includes:
determining an attenuation ratio for the second display region based on a loss parameter for the second display region;
determining the light transmission brightness of the second display area based on the gray level of the second display area;
and dividing the determined transmission brightness by the determined attenuation ratio to obtain a second display area brightness reference value.
Optionally, the compensation unit further comprises: and the voltage compensation circuit is connected to the compensation calculation processing unit and adjusts the power supply voltage of the second display area according to the determined second parameter.
Optionally, the compensation calculation processing unit is further configured to adjust a supply voltage of the second display area according to the determined second parameter.
Optionally, the compensation unit is further configured to perform color temperature correction on the display panel, wherein the luminance brightness extraction unit is further configured to extract a red light brightness value, a green light brightness value, and a blue light brightness value from the collected luminance brightness. The compensation calculation processing unit is further configured to perform: acquiring a reference value of a red light brightness value, a reference value of a green light brightness value and a reference value of a blue light brightness value of a first display area; and comparing the extracted red light brightness value, green light brightness value and blue light brightness value with the acquired reference value of the red light brightness value, the reference value of the green light brightness value and the reference value of the blue light brightness value of the first display area, so as to determine a first red light voltage offset, a first green light voltage offset and a first blue light voltage offset for performing color temperature correction on the first display area.
Optionally, the compensation unit further comprises: and the voltage compensation circuit is connected to the compensation calculation processing unit and adjusts the red light power supply voltage, the green light power supply voltage and the blue light power supply voltage of the first display area according to the determined first red light voltage offset, first green light voltage offset and first blue light voltage offset.
Optionally, the compensation calculation processing unit is further configured to adjust a red light power supply voltage, a green light power supply voltage, and a blue light power supply voltage of the first display area according to the determined first red light voltage offset, first green light voltage offset, and first blue light voltage offset.
Optionally, the compensation calculation processing unit is further configured to:
acquiring a reference value of a red light brightness value, a reference value of a green light brightness value and a reference value of a blue light brightness value of a second display area;
dividing the obtained reference value of the red light brightness value, the obtained reference value of the green light brightness value and the obtained reference value of the blue light brightness value of the second display area by the pixel density ratio of the second display area to the first display area to obtain an adjusted reference value of the red light brightness value, an adjusted reference value of the green light brightness value and an adjusted reference value of the blue light brightness value;
and comparing the extracted red light brightness value, green light brightness value and blue light brightness value with the adjusted reference value of the red light brightness value, the adjusted reference value of the green light brightness value and the adjusted reference value of the blue light brightness value, so as to determine a second red light voltage offset, a second green light voltage offset and a second blue light voltage offset for performing color temperature correction on the second display area.
Optionally, the compensation unit further comprises: and the voltage compensation circuit is connected to the compensation calculation processing unit and adjusts the red light power supply voltage, the green light power supply voltage and the blue light power supply voltage of the second display area according to the determined second red light voltage offset, second green light voltage offset and second blue light voltage offset.
Optionally, the compensation calculation processing unit is further configured to adjust the red light power supply voltage, the green light power supply voltage, and the blue light power supply voltage of the second display area according to the determined second red light voltage offset, second green light voltage offset, and second blue light voltage offset.
According to an aspect of the present invention, there is provided an electronic apparatus including the display device according to the above.
According to an aspect of the present invention, there is provided an electronic device selected from the group consisting of a mobile phone, a tablet computer, a notebook computer, a one-piece computer, a smart watch, and a door access device, the electronic device including the display device as described above.
According to an aspect of the present invention, there is provided a method of performing aging compensation on a display panel, the display panel having a first display region and a second display region, the first display region having a pixel density lower than that of the second display region, an acquisition unit being disposed below the first display region, the method including: collecting light with the collection unit; the display panel is age-compensated using a first parameter derived from the luminance brightness of the light collected by the collection unit.
Optionally, the aging compensation of the display panel using a first parameter derived from the brightness of the light collected by the collecting unit includes:
acquiring the brightness of the light collected from the collecting unit;
acquiring a first display area light brightness reference value;
determining a first ratio of the acquired brightness to the acquired reference value of the brightness of the first display area;
based on the first ratio, a first parameter for aging compensation of the first display region is determined.
Optionally, after the acquiring of the brightness of the light collected from the collecting unit, the method further comprises:
acquiring a second display area light brightness reference value;
determining the ratio of the luminance brightness acquired by the luminance brightness extraction unit to the reference value of the luminance brightness of the second display area, and dividing the ratio by the pixel density ratio of the second display area to the first display area to obtain a second ratio;
and determining a second parameter for aging compensation of the second display area based on the second ratio.
The display panel provided by the invention is provided with a first display area (an area above the under-screen acquisition unit) and a second display area (a normal display area), wherein the pixel density of the first display area is lower than that of the second display area, so that the display can be carried out at the pixel position of the first display area, and the position except the pixel can be shot by the under-screen acquisition unit. At the moment, the first display area has the same pixels as the normal display area, namely the second display area, so that the aging of the display panel can be reflected in some parameters of the light collected by the under-screen collecting unit, and the aging compensation is conveniently carried out on the display panel by skillfully utilizing some parameters of the light collected by the under-screen collecting unit, so that the complicated processing in the prior art is avoided.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
fig. 1 illustrates a schematic structure of a display device having an OLED display panel according to the related art;
FIG. 2 illustrates a side view structural diagram of a display device according to an embodiment of the present invention;
3A-B show exterior views of a display device with an off-screen acquisition unit according to embodiments of the present invention;
4A-C illustrate a first display area and a second display area having different pixel densities in accordance with embodiments of the present invention;
FIGS. 5A-B illustrate block diagrams of a display device according to an embodiment of the present invention;
FIG. 6A shows the decay ratio of an OLED display panel with different loss intensities versus loss time according to an embodiment of the present invention;
fig. 6B illustrates a luminance versus gray scale of the OLED display panel according to an embodiment of the present invention.
Description of reference numerals:
a display device 1;
ambient/ambient light 11;
an OLED light 12;
a cathode layer 13;
an organic light emitting material layer 14;
an anode layer 15;
a transmitted light 16;
a transparent cathode layer 13';
a transparent anode layer 15';
a transparent display area 31;
a non-transparent display area 32;
an off-screen acquisition unit 33;
a pixel 19;
a compensation unit 34;
an ISP bridge 35;
a compensation calculation processing unit 36;
and a voltage compensation circuit 37.
Detailed Description
Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples.
Fig. 2 shows a side view structural diagram of the display device 1 according to the embodiment of the present invention. As can be seen from the figure, the display device 1 comprises an organic light emitting diode OLED display panel and an under-screen acquisition unit 33. The under-screen capture unit 33 may be an under-screen camera or other device capable of capturing light. The organic light emitting diode OLED display panel has a first OLED region 31 and a second OLED region 32. Both the first 31 and the second 32 OLED regions contain pixels 19, the locations of the pixels 19 being opaque, and the locations of the first OLED regions 31 other than the pixels 19 being transmissive. The pixel density of the first OLED region 31 is lower than the pixel density of the second OLED region 32. The under-screen collecting unit 33 is disposed under the first OLED region to collect light incident into the first OLED region.
As can be seen from fig. 2, in the embodiment of the present invention, the first OLED region 31 is transparent except for the pixels 19, which ensures that the under-screen capture unit 33 can capture images. At the same time, the first OLED region 31 has pixels, and the positions of the pixels can be used for displaying. Moreover, due to the existence of the pixels, the light collected by the under-screen collecting unit 33 can reflect the aging of the OLED display panel, so that the aging of the OLED display panel can be compensated by using some parameters obtained from the light collected by the under-screen collecting unit 33.
Fig. 3A-B show exterior views of a display device with an off-screen acquisition unit 33 according to an embodiment of the present invention. As can be seen from there, the under-screen capture unit 33 is hidden visible underneath the first OLED region 31. Since the pixel density of the first OLED area 31 is lower than the pixel density of the second OLED area 32, the first OLED area 31 is generally more transparent than the second OLED area 32 and can transmit light, but not completely light due to the presence of the pixels.
Fig. 4A-C show top views of OLED display panels with three different pixel arrangements according to embodiments of the invention. In these figures, the open diamonds represent red pixels, the open diamonds with dots in the middle represent green pixels, and the open diamonds with + in the middle represent blue pixels. As can be seen from these figures, although the red, green and blue pixels are arranged differently, in either arrangement, the pixel density of the first OLED region 31 is lower than that of the second OLED region 32,
fig. 5A-B show structural diagrams of a display device according to an embodiment of the present invention. Fig. 5A shows the first OLED region 31 and the second OLED region 32 from the side of the OLED display panel. Fig. 5B shows the first OLED region 31 and the second OLED region 32 from above the OLED display panel.
In fig. 5A-B, the compensation unit 34 compensates for the aging of the OLED display panel using the light collected by the off-screen collection unit 33. The compensation unit 34 includes an Image Signal Processing (ISP) bridge 35 and a compensation calculation processing unit 36.
The luminance extracting unit 35 is connected to the off-screen collecting unit 33, and collects luminance from the light collected by the off-screen collecting unit 33. The luminance extracting unit 35 may be an ISP bridge, or other circuit or unit capable of acquiring the luminance of light. The compensation calculation processing unit 36 is connected to the light brightness extraction unit 35.
The compensation calculation processing unit 36 determines the attenuation ratio of the first OLED region based on the loss parameter of the first OLED region. The loss parameters may include loss time and loss intensity, but may be other loss parameters. Fig. 6A shows a graph of decay versus time for an OLED display panel or OLED pixel at different loss intensities. In fig. 6A, the loss strength is measured in current density in amperes per square meter and time in hours. Based on the loss strength of the OLED display panel, a corresponding curve can be found in fig. 6A, and then a corresponding attenuation ratio can be found on the curve according to the loss curve.
The compensation calculation processing unit 36 also determines the transmission luminance of the first OLED region based on the gray level of the first OLED region. Fig. 6B shows a graph of transmission luminance as a function of gray scale. Thus, depending on the grey level of the first OLED region, a corresponding transmitted light brightness can be found on the curve. This transmission luminance is the luminance of light that the OLED region can transmit without any loss.
The OLED area luminance reference value is the luminance transmitted without aging at all in the OLED area. Without aging, only the material of the OLED region does not change to another material, but its light transmission is also lossy due to wear and the like. The current luminance reference value of the OLED region should be the light transmission luminance when not lost divided by the attenuation ratio (i.e. the rate of decrease in light transmission luminance due to wear in use, etc.), i.e. the determined light transmission luminance is divided by the determined attenuation ratio to obtain the first OLED region luminance reference value.
The luminance extracting unit 35 outputs an actual luminance value transmitted by the first OLED region, and the actual luminance value is divided by the acquired reference luminance value of the first OLED region, so that a ratio is called a first ratio. The first ratio is the ratio of the actual luminance value transmitted by the first OLED region to the reference value, from which the percentage deviation of the actual luminance value transmitted by the first OLED region from the reference value can be seen. Based on the ratio, the amount of deviation of the transmitted actual luminance value from the reference value can be obtained, and by shifting the supply voltage to the first OLED region by an offset amount, the transmitted actual luminance value can be made to tend to coincide with the reference value deviation, and therefore, based on the first ratio, the first parameter for performing aging compensation on the first OLED region can be determined. In one embodiment, the first parameter may be the first power offset, but may also be another parameter for adjusting the supply voltage of the first OLED region. The supply voltage of the first OLED region can then be adjusted with this first parameter.
The adjustment of the supply voltage of the first OLED region with this first parameter can be performed by providing a power supply compensation circuit 37 in the compensation unit 34, as shown in fig. 5A-B. The power supply compensation circuit 37 is connected to said compensation calculation processing unit 36 for adjusting the supply voltage of the first OLED region in accordance with the determined first parameter.
The voltage compensation circuit 37 in fig. 5A-B may be omitted. In this way, the function of adjusting the supply voltage of the first OLED region in accordance with the determined first parameter is performed by the compensation calculation processing unit 36.
By the above compensation, only the aging of the low pixel density area, i.e. the first OLED area, is compensated. To compensate for the aging of the high pixel density region, i.e., the second OLED region, in one embodiment, the compensation calculation processing unit 36 may also determine the attenuation ratio of the second OLED region based on the loss parameter of the second OLED region with reference to a curve as shown in fig. 6A. In one embodiment, the attenuation ratio of the second OLED region may be determined based on the loss time, loss intensity of the second OLED region. In addition, the light transmission brightness of the second OLED region, which is a light transmission brightness reference value of the second OLED region when the second OLED region is not damaged, may be determined based on the gray level of the second OLED region with reference to the graph shown in fig. 6B. When the OLED is used for a period of time, the transmission brightness reference value is reduced due to loss, and the determined transmission brightness is divided by the determined attenuation ratio to obtain the brightness reference value of the second OLED region, namely the brightness reference value of the current region after the loss of the period of time.
Then, the compensation calculation processing unit 36 determines a ratio of the luminance output by the luminance extracting unit 35 to the acquired luminance reference value of the second OLED region, and divides the ratio by the pixel density ratio of the second OLED region to the first OLED region to obtain a second ratio. The reference value for the luminance of the second OLED region is the luminance of light that the second OLED region should transmit without aging at all, so this second ratio is the ratio between the actual transmitted luminance of the second OLED region and the reference transmitted luminance, which reflects the degree of aging of the second OLED region. Similarly to the determination of the first parameter for the aging compensation of the first OLED region on the basis of the first ratio, here too the determination of the second parameter for the aging compensation of the second OLED region on the basis of the second ratio is possible. The second parameter here may be the second offset of the power supply, but also other parameters for ageing compensation of the second OLED region.
Adjusting the supply voltage of the second OLED region in accordance with the determined second parameter, similar to adjusting the supply voltage of the first OLED region in accordance with the determined first parameter, can be done either by the voltage compensation circuit 37 in fig. 5A-B or by the compensation calculation processing unit 36, so that the voltage compensation circuit 37 is omitted.
In addition, in one embodiment, the compensation unit 34 can compensate for not only the aging of the OLED display panel but also the color temperature.
The luminance extracting unit 35 also extracts a red light luminance value, a green light luminance value, and a blue light luminance value from the collected luminance at the time of color temperature correction.
The compensation calculation processing unit 36 acquires a reference value of a red light luminance value, a reference value of a green light luminance value, and a reference value of a blue light luminance value of the first OLED region. The reference value of the red light luminance value, the reference value of the green light luminance value, and the reference value of the blue light luminance value are the red light luminance value, the green light luminance value, and the blue light luminance value, respectively, which should be transmitted when the OLED region is not aged at all. The specific method comprises the following steps: determining an attenuation ratio of a first OLED region based on a loss parameter of the first OLED region, wherein the attenuation ratio of the first OLED region can be determined based on a loss time and a loss intensity of the first OLED region; then, a red light brightness value, a green light brightness value, and a blue light brightness value of the first OLED region to transmit light are determined based on the gray level of the first OLED region. These luminance values are reference values of the red light luminance value, the green light luminance value, and the blue light luminance value of the first OLED region that transmits light without loss. Once used, the transmission luminance is divided by the determined attenuation ratio to obtain a reference value of the red light luminance value, a reference value of the green light luminance value, and a reference value of the blue light luminance value at the present time after the loss.
Then, the compensation calculation processing unit 36 compares the extracted red light brightness value, green light brightness value, and blue light brightness value with the obtained reference value of the red light brightness value, green light brightness value, and blue light brightness value of the first OLED region, where the former is the actually obtained red light brightness value, green light brightness value, and blue light brightness value, and the latter is the red light brightness value, green light brightness value, and blue light brightness value that should be obtained without considering aging of the current first OLED region, and determines, by determining the difference between the two values, that the difference is to be compensated for, the red, green and blue offset required in the first OLED region, namely, a first red light voltage offset, a first green light voltage offset and a first blue light voltage offset for performing color temperature correction on the first OLED region.
The adjustment of the red light supply voltage, the green light supply voltage and the blue light supply voltage of the first OLED region according to the determined first red light voltage offset, first green light voltage offset and first blue light voltage offset may be performed by the voltage compensation circuit 37 as shown in fig. 5A-B, or the voltage compensation circuit 37 in fig. 5A-B may be omitted and instead performed by the compensation calculation processing unit 36.
As described above, only the color temperature of the first OLED region is corrected, and the compensation calculation processing unit 36 also acquires the reference value of the red light luminance value, the reference value of the green light luminance value, and the reference value of the blue light luminance value of the second OLED region in order to correct the color temperature of the second OLED region. The specific method comprises the following steps: determining an attenuation ratio of a second OLED region based on a loss parameter of the second OLED region, wherein the attenuation ratio of the second OLED region can be determined based on a loss time and a loss intensity of the second OLED region; then, a red light brightness value, a green light brightness value, and a blue light brightness value of the second OLED region to transmit light are determined based on the gray level of the second OLED region. These luminance values are reference values of the red light luminance value, the green light luminance value, and the blue light luminance value of the second OLED region that transmits light without loss. Once used, the transmission luminance is divided by the determined attenuation ratio to obtain a reference value of the red light luminance value, a reference value of the green light luminance value, and a reference value of the blue light luminance value at the present time after the loss.
Then, the compensation calculation processing unit 36 divides the obtained reference value of the red light luminance value, the reference value of the green light luminance value, and the reference value of the blue light luminance value of the second OLED region by the pixel density ratio between the second OLED region and the first OLED region, and obtains an adjusted reference value of the red light luminance value, an adjusted reference value of the green light luminance value, and an adjusted reference value of the blue light luminance value.
Then, the compensation calculation processing unit 36 compares the extracted red light luminance value, green light luminance value, and blue light luminance value with the adjusted reference value of the red light luminance value, the adjusted reference value of the green light luminance value, and the adjusted reference value of the blue light luminance value. The former is a red light luminance value, a green light luminance value, and a blue light luminance value extracted from the first OLED region, and the latter is calculated based on the second OLED region, but the reference values obtained by dividing the luminance values by the pixel density ratio of the second OLED region to the first OLED region become a red light luminance value, a green light luminance value, and a blue light luminance value of the first OLED region. From the difference between the two, the influence of the color temperature can be reflected. In order to eliminate this difference, an offset is given to the red voltage, the green voltage, and the blue voltage of the supply voltage of the second OLED region, respectively, that is, a second red light voltage offset, a second green light voltage offset, and a second blue light voltage offset for color temperature correction of the second OLED region.
The adjustment of the red light supply voltage, the green light supply voltage and the blue light supply voltage of the second OLED region according to the determined second red light voltage offset, second green light voltage offset and second blue light voltage offset may be performed by the voltage compensation circuit 37 as shown in fig. 5A-B, or the voltage compensation circuit 37 in fig. 5A-B may be omitted and instead performed by the compensation calculation processing unit 36.
Although the above embodiments have been described with respect to the first OLED area 31 and the second OLED area 32, it will be appreciated by those skilled in the art that the present invention may also be adapted to other non-OLED first display areas 31 and second display areas 32.
While embodiments in accordance with the invention have been described above, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (21)
1. A display device, comprising:
the display panel is provided with a first display area and a second display area, and the pixel density of the first display area is lower than that of the second display area;
the acquisition unit is arranged below the first display area and used for acquiring light emitted into the first display area;
and the compensation unit is used for carrying out aging compensation on the display panel by utilizing a first parameter obtained based on the brightness acquired by the acquisition unit.
2. The display device according to claim 1, wherein the compensation unit comprises:
a light brightness extraction unit connected to the collection unit to extract light brightness from the light collected by the collection unit;
and a compensation calculation processing unit connected to the light brightness extraction unit.
3. The display device according to claim 2, wherein the compensation calculation processing unit is configured to perform the following steps:
acquiring a first display area light brightness reference value;
determining a first ratio of the luminance brightness output by the luminance brightness extraction unit to the acquired luminance reference value of the first display area;
based on the first ratio, a first parameter for aging compensation of the first display region is determined.
4. The method according to claim 3, wherein said obtaining the first display region luminance reference value comprises:
determining an attenuation ratio for the first display region based on a loss parameter for the first display region;
determining the light transmission brightness of the first display area based on the gray level of the first display area;
and dividing the determined transmission brightness by the determined attenuation ratio to obtain a first display area light brightness reference value.
5. The display device according to claim 3, wherein the compensation unit further comprises:
and the voltage compensation circuit is connected to the compensation calculation processing unit and is used for adjusting the power supply voltage of the first display area according to the determined first parameter.
6. The display device according to claim 3, wherein the compensation calculation processing unit is further configured to adjust a supply voltage of the first display region in accordance with the determined first parameter.
7. The display device according to claim 3, wherein the compensation calculation processing unit is further configured to:
acquiring a second display area light brightness reference value;
determining the ratio of the luminance output by the luminance extraction unit to the acquired luminance reference value of the second display area, and dividing the ratio by the pixel density ratio of the second display area to the first display area to obtain a second ratio;
and determining a second parameter for aging compensation of the second display area based on the second ratio.
8. The method according to claim 7, wherein said obtaining the second display region luminance reference value comprises:
determining an attenuation ratio for the second display region based on a loss parameter for the second display region;
determining the light transmission brightness of the second display area based on the gray level of the second display area;
and dividing the determined transmission brightness by the determined attenuation ratio to obtain a second display area brightness reference value.
9. The display device according to claim 7, wherein the compensation unit further comprises:
and the voltage compensation circuit is connected to the compensation calculation processing unit and adjusts the power supply voltage of the second display area according to the determined second parameter.
10. The display device according to claim 7, wherein the compensation calculation processing unit is further configured to adjust a supply voltage of the second display area according to the determined second parameter.
11. The display device according to claim 3, wherein the compensation unit is further configured to perform color temperature correction on the display panel,
the luminance extracting unit is also used for extracting a red light luminance value, a green light luminance value and a blue light luminance value from the extracted luminance;
the compensation calculation processing unit is further configured to perform:
acquiring a reference value of a red light brightness value, a reference value of a green light brightness value and a reference value of a blue light brightness value of a first display area;
and comparing the extracted red light brightness value, green light brightness value and blue light brightness value with the acquired reference value of the red light brightness value, the reference value of the green light brightness value and the reference value of the blue light brightness value of the first display area, so as to determine a first red light voltage offset, a first green light voltage offset and a first blue light voltage offset for performing color temperature correction on the first display area.
12. The display device according to claim 11, wherein the compensation unit further comprises:
and the voltage compensation circuit is connected to the compensation calculation processing unit and adjusts the red light power supply voltage, the green light power supply voltage and the blue light power supply voltage of the first display area according to the determined first red light voltage offset, first green light voltage offset and first blue light voltage offset.
13. The display device according to claim 11, wherein the compensation calculation processing unit is further configured to adjust the red light supply voltage, the green light supply voltage, and the blue light supply voltage of the first display region according to the determined first red light voltage offset, first green light voltage offset, and first blue light voltage offset.
14. The display device according to claim 11, wherein the compensation calculation processing unit is further configured to:
acquiring a reference value of a red light brightness value, a reference value of a green light brightness value and a reference value of a blue light brightness value of a second display area;
dividing the obtained reference value of the red light brightness value, the obtained reference value of the green light brightness value and the obtained reference value of the blue light brightness value of the second display area by the pixel density ratio of the second display area to the first display area to obtain an adjusted reference value of the red light brightness value, an adjusted reference value of the green light brightness value and an adjusted reference value of the blue light brightness value;
and comparing the extracted red light brightness value, green light brightness value and blue light brightness value with the adjusted reference value of the red light brightness value, the adjusted reference value of the green light brightness value and the adjusted reference value of the blue light brightness value, so as to determine a second red light voltage offset, a second green light voltage offset and a second blue light voltage offset for performing color temperature correction on the second display area.
15. The display device according to claim 14, wherein the compensation unit further comprises:
and the voltage compensation circuit is connected to the compensation calculation processing unit and adjusts the red light power supply voltage, the green light power supply voltage and the blue light power supply voltage of the second display area according to the determined second red light voltage offset, second green light voltage offset and second blue light voltage offset.
16. The display device according to claim 14, wherein the compensation calculation processing unit is further configured to adjust the red light supply voltage, the green light supply voltage, and the blue light supply voltage of the second display region according to the determined second red light voltage offset, second green light voltage offset, and second blue light voltage offset.
17. An electronic device, characterized in that the electronic device comprises a display apparatus according to any one of claims 1-16.
18. An electronic device selected from the group consisting of a cell phone, a tablet, a laptop, a all-in-one computer, a smart watch, and a door entry device, wherein the electronic device comprises a display device according to any one of claims 1-16.
19. A method for aging compensation of a display panel, wherein the display panel has a first display area and a second display area, the pixel density of the first display area is lower than that of the second display area, an acquisition unit is arranged below the first display area, and the method comprises:
collecting light with the collection unit;
the display panel is age-compensated using a first parameter derived from the luminance brightness of the light collected by the collection unit.
20. The method of claim 19, wherein said age compensating the display panel using a first parameter derived from luminance brightness of light collected by the collection unit comprises:
acquiring the brightness of the light collected from the collecting unit;
acquiring a first display area light brightness reference value;
determining a first ratio of the acquired brightness to the acquired reference value of the brightness of the first display area;
based on the first ratio, a first parameter for aging compensation of the first display region is determined.
21. The method of claim 19, wherein after said obtaining the brightness of the light collected from the collection unit, the method further comprises:
acquiring a second display area light brightness reference value;
determining the ratio of the luminance brightness acquired by the luminance brightness extraction unit to the reference value of the luminance brightness of the second display area, and dividing the ratio by the pixel density ratio of the second display area to the first display area to obtain a second ratio;
and determining a second parameter for aging compensation of the second display area based on the second ratio.
Priority Applications (2)
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| CN201911357890.0A CN110956925A (en) | 2019-12-25 | 2019-12-25 | Display device, electronic equipment and method for aging compensation of display panel |
| PCT/CN2020/136373 WO2021129451A1 (en) | 2019-12-25 | 2020-12-15 | Display device, electronic apparatus and method for performing aging compensation on display panel |
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| CN201911357890.0A CN110956925A (en) | 2019-12-25 | 2019-12-25 | Display device, electronic equipment and method for aging compensation of display panel |
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| WO (1) | WO2021129451A1 (en) |
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