CN215181300U - Screen-folding display device - Google Patents
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- CN215181300U CN215181300U CN202023179947.3U CN202023179947U CN215181300U CN 215181300 U CN215181300 U CN 215181300U CN 202023179947 U CN202023179947 U CN 202023179947U CN 215181300 U CN215181300 U CN 215181300U
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Abstract
The present disclosure provides a stacked screen display device. Fold screen display device, including range upon range of setting up backlight unit, accuse light panel and display panel in proper order, backlight unit is including range upon range of backplate, reflector panel and the diffuser plate that sets up in proper order, be provided with a plurality of luminescence units on the reflector panel, be equipped with temperature sensor on the backlight unit, temperature sensor is used for detecting backlight unit's temperature is with the basis the temperature is right display panel compensates. This disclosed embodiment realizes detecting backlight unit's temperature through setting up temperature sensor to compensate display panel according to the temperature testing result, help reducing the influence of temperature to display panel's display effect, improve display effect.
Description
Technical Field
The present disclosure relates to display technologies, and particularly to a screen-stacking display device.
Background
The liquid crystal display device needs to be provided with a backlight source, the backlight source may generate more heat in the working process, so that the overall temperature of the display device changes, and the temperature change of the display device may cause the color temperature of the display device to change, thereby affecting the display effect.
SUMMERY OF THE UTILITY MODEL
The embodiment of the disclosure provides a display device with a stacked screen, which comprises a backlight module, a light control panel and a display panel which are sequentially stacked, wherein the backlight module comprises a back plate, a reflecting plate and a diffusing plate which are sequentially stacked, the reflecting plate is provided with a plurality of light emitting units, the backlight module is provided with a temperature sensor, and the temperature sensor is used for detecting the temperature of the backlight module so as to compensate the display panel according to the temperature.
Optionally, the light reflection plate is rectangular, the light reflection plate has a first central axis and a second central axis that are perpendicular to each other, the temperature sensor is disposed on one side of the light reflection plate close to the diffusion plate, and the positions of the temperature sensor are symmetrically distributed about the first central axis and the second central axis.
Optionally, the first central axis and the second central axis divide the light reflection plate into four rectangular sub-regions, and the temperature sensors are symmetrically distributed in each sub-region about two central axes of the sub-region.
Optionally, the number of the temperature sensors is four, and the four temperature sensors are respectively located at the geometric center of the sub-region.
Optionally, the light emitting units are respectively disposed on the reflector at equal intervals along a first direction and a second direction to form a light emitting unit array, where the first direction and the second direction are different directions, and the temperature sensor is located at a geometric center of the nearest four light emitting units.
Optionally, the positions of two adjacent columns of light emitting units are aligned along the first direction, i.e., the second direction; or
Two adjacent columns of light-emitting units are arranged in a staggered manner in the first direction and the second direction
Optionally, the number of the temperature sensors is four, and the four temperature sensors are respectively located at four vertexes of the backlight module.
Optionally, at the edge of the backlight module, the light reflecting plate forms a bending portion which is bent towards a direction away from the back plate, a rubber frame is arranged between the bending portion and the back plate, at least part of the surface of the rubber frame extends along the surfaces of the back plate and the bending portion and is respectively abutted against the back plate and the light reflecting plate, an accommodating cavity is formed inside the rubber frame, and the temperature sensor is located in the accommodating cavity.
Optionally, the backing plate is further included between the back plate and the light reflecting plate, the backing plate includes an edge portion extending to the bending portion and between the back plates, two opposite surfaces of the edge portion are respectively connected with the rubber frame and the back plate in an abutting mode, the temperature sensor is arranged at a portion where the rubber frame is connected with the edge portion in an abutting mode, and the temperature sensor is located on one side surface, far away from the back plate, of the rubber frame.
Optionally, the temperature sensor includes an input end for acquiring an input signal, an output end for outputting a temperature signal, and a plurality of address ends for acquiring an address signal, the input end of the temperature sensor is connected to an input voltage end for providing the same input signal, the output end of the temperature sensor is connected to an output bus, and the temperature sensor acquires the address signal corresponding to each temperature sensor through the plurality of address ends.
This disclosed embodiment realizes detecting backlight unit's temperature through setting up temperature sensor to compensate display panel according to the temperature testing result, help reducing the influence of temperature to display panel's display effect, improve display effect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments of the present disclosure will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings may be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a display device provided in an embodiment of the present disclosure;
fig. 2 is a schematic view of a partial structure of a backlight module according to an embodiment of the disclosure;
FIG. 3 is a schematic diagram of a temperature sensor arrangement in one embodiment of the present disclosure;
FIG. 4 is a schematic diagram of yet another arrangement of temperature sensors in an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of the location of a temperature sensor and a light emitting unit in one embodiment of the present disclosure;
FIG. 6 is a schematic view of another position of a temperature sensor and a light emitting unit in an embodiment of the present disclosure;
FIG. 7 is a schematic diagram of yet another arrangement of temperature sensors in an embodiment of the present disclosure;
FIG. 8 is a schematic diagram of the connection relationship of the temperature sensors in one embodiment of the present disclosure;
FIG. 9 is a flowchart illustrating a method for controlling a display device according to an embodiment of the present disclosure;
FIG. 10 is a schematic illustration of a compensation relationship in an embodiment of the disclosure;
FIG. 11 is a partial schematic view of a compensation table in an embodiment of the present disclosure;
fig. 12 is a schematic diagram illustrating adjustment of color coordinates according to an embodiment of the disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some, but not all embodiments of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The embodiment of the disclosure provides a screen-folding display device.
As shown in fig. 1, in one embodiment, the display device includes a backlight module 100, a light-controlling panel 300 and a display panel 500, which are stacked in sequence, wherein the light-controlling panel 300 (or Sub-panel) includes a plurality of light-controlling pixels, and the display panel 500 (or Main panel) includes a plurality of display pixels.
The main difference between the light control panel 300 and the display panel 500 is that the display panel 500 further includes a color filter, and the light control panel 300 is used for controlling the passing of light through the pixel level and even the sub-pixel level through the liquid crystal deflection, so that the display contrast of the display device can be improved, and the display effect can be improved.
As shown in fig. 2, in an embodiment, the backlight module 100 includes a back plate 101, a light reflecting plate 102 and a diffusion plate 103, which are sequentially stacked, wherein a plurality of light emitting units 107 are disposed on the light reflecting plate 102, the light emitting units 107 may be light sources such as diodes providing illumination, the light reflecting plate 102 is configured to reflect light to a side away from the back plate 101, so that the light is transmitted to the display panel more, the display brightness is improved, and the diffusion plate 103 is configured to make the light more uniform.
The backlight module 100 further includes a temperature sensor 200, and the temperature sensor 200 is used for detecting the temperature of the backlight module 100 to compensate the display panel according to the temperature.
It should be understood that, because the operating efficiency of the light emitting unit 107 is limited, a portion of the electrical energy is converted into heat energy during the operation process, so as to raise the temperature of the display device, the backlight module 100 is one of the main heat sources during the operation process of the display device.
The temperature of the display panel is also changed by the temperature change of the backlight module 100, and further, the display effect of the display panel is affected.
In implementing the present disclosure, a skilled person finds that if the temperature sensor 200 is disposed in the display area (AA) of the display panel, the display effect may be affected to some extent. For example, a part of light may be blocked to affect the brightness of the display panel, and the temperature sensor 200 is disposed in the peripheral area of the display panel, which may have a poor effect of detecting the temperature of the display panel. In addition, if the temperature sensor 200 is disposed on the display panel, the manufacturing process of the display panel needs to be adjusted, which may result in significant increase in manufacturing and development costs, and stability and reliability of the product may be reduced compared to a relatively mature existing display panel.
The skilled person also finds that, since the heat of the display panel mainly comes from the backlight module 100, the temperature of the display panel can be further determined by detecting the temperature of the backlight module 100, so as to compensate the display effect of the display panel.
As shown in fig. 3, in an embodiment, the light reflecting plate 102 is rectangular, the light reflecting plate 102 has a first central axis MM 'and a second central axis NN' perpendicular to each other, the positions of the plurality of temperature sensors 200 are symmetrically distributed about the first central axis MM 'and the second central axis NN', and the temperature sensors 200 are disposed on the light reflecting plate 102 and between the light reflecting plate 102 and the diffusion plate 103, which can also be understood as a side of the light reflecting plate 102 close to the diffusion plate 103 or a side of the light reflecting plate 102 away from the back plate 101.
As shown in fig. 3 and 4, the light reflecting plate 102 has a first central axis MM 'and a second central axis NN' perpendicular to each other, and it is understood that the first central axis MM 'and the second central axis NN' are respectively middle-point connecting lines of two opposite sides of the rectangular light reflecting plate 102. A plurality of temperature sensor 200 are on first axis MM ' and the equal symmetric distribution of second axis NN ', like this, temperature sensor 200's position distribution is relatively even, can realize the accuracy to backlight unit temperature detection.
The embodiment of the present disclosure realizes the detection of the temperature of the backlight module 100 by setting the plurality of temperature sensors 200, and the positions of the plurality of sensors are symmetrically distributed about the first central axis and the second central axis of the backlight module 100, so that the detection precision of the temperature of the backlight module 100 can be improved, thereby contributing to the improvement of the compensation effect for the display panel.
As shown in fig. 3 and 4, in some embodiments, the first central axis MM 'and the second central axis NN' divide the light reflecting plate 102 into A, B, C, D four rectangular sub-regions, and the temperature sensors 200 are symmetrically distributed about two central axes of the sub-regions in each sub-region.
Illustratively, as shown in fig. 3, in one embodiment, the number of the temperature sensors 200 is four, and the four temperature sensors 200 are respectively located at the geometric centers of the sub-regions. As shown in fig. 4, more temperature sensors 200 can be provided and distributed symmetrically in each sub-area, which helps to further improve the accuracy of the temperature detection.
The light emitting cells 107 are arranged on the light reflecting plate 102 at equal intervals in a first direction and a second direction, respectively, which are different directions, to form a light emitting cell array.
As shown in fig. 5 and 6, in the present embodiment, the first direction is taken as a transverse direction, and the second direction is taken as a longitudinal direction for illustration.
The positions of the light emitting units 107 in two adjacent columns are aligned in the first direction and the second direction, or the light emitting units 107 in two adjacent columns are staggered in the first direction and the second direction.
As shown in fig. 5, two adjacent columns of light emitting units 107 may be aligned, and as shown in fig. 6, two adjacent columns of light emitting units 107 may also be staggered, each of which can form an array of light emitting units 107 arranged at equal intervals. The temperature sensor is located at the geometric center of the four light emitting units 107 that are most adjacent.
As shown in fig. 5 and 6, the temperature sensor is disposed at the geometric center of the nearest four light-emitting units 107, and may be specifically the intersection of the diagonals of the four light-emitting units 107 arranged in a rectangular or parallelogram, which helps to reduce the influence on the light-emitting units 107.
As shown in fig. 7, in some embodiments, the number of the temperature sensors 200 is four, and the four temperature sensors 200 are respectively located at four vertices of the backlight module 100.
By disposing the temperature sensors 200 at the four vertices of the backlight module 100, the temperature of the backlight module 100 can be detected, and the thickness of the backlight module 100 can be reduced.
As shown in fig. 2, at an edge of the backlight module 100, the light reflecting plate 102 forms a bending portion 102A bending away from the back plate 101, a rubber frame 104 is disposed between the bending portion 102A and the back plate 101, at least a part of a surface of the rubber frame 104 extends along surfaces of the back plate 101 and the bending portion 102A and abuts against the back plate 101 and the light reflecting plate 102, an accommodating cavity 106 is formed inside the rubber frame 104, and the temperature sensor 200 is located in the accommodating cavity 106.
By bending the light reflection plate 102 to form the bending part 102A, the accommodating cavity 106 for accommodating the temperature sensor 200 can be provided without increasing the thickness of the backlight module 100, thereby reducing the occupied space.
As shown in fig. 2, in some embodiments, a backing plate 105 is further included between the back plate 101 and the light reflecting plate 102, the backing plate 105 includes an edge portion 105A extending to between the bending portion 102A and the back plate 101, two opposite surfaces of the edge portion 105A are respectively abutted against the rubber frame 104 and the back plate 101, the temperature sensor 200 is disposed at a portion where the rubber frame 104 is abutted against the edge portion 105A, and the temperature sensor 200 is located on a side surface of the rubber frame 104 away from the back plate 101.
The backing plate 105 is used to prevent the reflector 102 from directly contacting the back plate 101, so as to protect the backlight module 100, and the backing plate 105 can also play a role in assisting heat dissipation to some extent. In some embodiments, the thermal conductivity of the pad 105 is greater than that of the reflective sheet, so that the temperature distribution of the backlight module 100 is more uniform.
As shown in fig. 2, in some other embodiments, the temperature sensor 200 may also be disposed at a portion of the rubber frame 104 abutting against the reflective plate 102, specifically, at a portion of the rubber frame 104 abutting against the bending portion 102A, and at a side surface of the rubber frame 104 far away from the bending portion 102A.
The technical staff discovers at the in-process of realizing the technical scheme of the present disclosure that the temperature difference between the back plate 101 and other structures of the display device and the display panel is large, and the temperature change is not obvious, and the temperature change rate of the reflector 102 is high, and the temperature correlation between the reflector and the display panel is large, therefore, the temperature sensor 200 is arranged between the back plate 101 and the reflector 102, or arranged at the position of the rubber frame 104 abutted against the reflector 102, which can improve the accuracy of the temperature detection, wherein, when the temperature sensor 200 is arranged between the back plate 101 and the reflector 102, and abutted against the reflector 102, the temperature detection is more accurate.
In some embodiments, the temperature sensors 200 comprise an input for receiving an input signal, an output for outputting a temperature signal, and a plurality of address terminals for receiving address signals, the inputs of the plurality of temperature sensors 200 are connected to an input voltage terminal VCC for providing the same input signal, the outputs of the plurality of temperature sensors 200 are connected to an output bus, which may be I2And the temperature sensors 200 acquire address signals corresponding to each temperature sensor 200 through a plurality of address terminals.
In this embodiment, the position sensors located at different positions are marked by address signals, so as to determine the temperatures at different positions.
In the present embodiment, four temperature sensors IC1, IC2, IC3, and IC4 are provided. Referring to fig. 3, the embodiment is exemplified by the IC1 disposed in the sub-region a, the IC2 disposed in the sub-region B, the IC3 disposed in the sub-region C, and the IC4 disposed in the sub-region D.
As shown in fig. 8, each of the temperature sensors 200 includes three address terminals a0, a1, and a2, and 8 different address signals can be provided in total by providing a high level signal 1 and a low level signal 0, respectively, through the three address terminals.
As shown in table 1, four kinds of address signals are selected from the address signals that can be supplied, and are used as the address signals of the four temperature sensors 200, respectively, and the address signals of the temperature sensors 200 are different from each other, so that the positions of the temperature sensors 200 that are marked differently can be realized.
Table 1: temperature sensor address signal table
| Region(s) | Temperature sensor | A0 | A1 | | |
| A | IC1 | ||||
| 0 | 0 | 0 | |||
| | IC2 | 0 | 0 | 1 | |
| | IC3 | 0 | 1 | 0 | |
| | IC4 | 0 | 1 | 1 |
It should be understood that if only four temperature sensors 200 are provided, only two address terminals are needed to provide address signals at least, and in practice, different numbers of address terminals can be provided according to the number of temperature sensors 200.
The embodiment of the disclosure provides a control method of a display device.
As shown in fig. 9, in one embodiment, the control method of the display apparatus includes:
step 901: the temperature of the backlight module is detected through a temperature sensor arranged on the backlight module of the display device.
In this embodiment, the temperature of the backlight module is first obtained through the temperature sensor, and specifically, the corresponding temperature value is determined according to the temperature signal detected by the temperature sensor.
In one embodiment, the backlight module comprises N backlight regions and N groups of temperature sensors corresponding to the N backlight regions, wherein in each group of temperature sensors, the number of the temperature sensors is one or more, and the display panel comprises N display regions corresponding to the N backlight regions.
In the present embodiment, N is a positive integer, and is exemplarily equal to 4 when applied to a display device including the reflector shown in fig. 3 or 4, 1 temperature sensor per group when applied to a display device including the reflector shown in fig. 3, and 5 temperature sensors per group when applied to a display device including the reflector shown in fig. 3.
The step 901 specifically includes: and respectively detecting the temperatures of the N backlight areas through the N groups of temperature sensors.
That is to say, detect the temperature in each backlight area respectively, help improving to the accuracy degree of backlight unit temperature detection to can realize carrying out the compensation that has the correspondence to each region of display panel, help improving the compensation effect.
In some embodiments, the temperature sensors include an output terminal for outputting the temperature signal and a plurality of address terminals for obtaining the address signal, the input terminals of the plurality of temperature sensors are connected to the input voltage terminal for providing the same input signal, and the output terminals of the plurality of temperature sensors are connected to the output bus.
For example, the temperature sensor may be arranged in the manner described with reference to the embodiment shown in fig. 8. This step 901 may further include:
acquiring address signals and temperature signals transmitted by the plurality of temperature sensors through the output bus;
determining the corresponding relation between the temperature signal and the backlight area according to the address signal;
and determining the temperature of each backlight area according to the temperature signal.
In this embodiment, under the condition that the backlight module includes N sub-regions, different address signals are provided for the temperature sensor, and while acquiring the temperature signal, an address signal corresponding to the temperature sensor is also acquired, so as to determine a correspondence between the acquired temperature signal and the backlight region, and then the temperature of the backlight region is determined according to the temperature signal of each backlight region.
Step 902: and determining the temperature of a display panel of the display device according to the backlight module.
After the backlight module is determined, the temperature of the display panel is determined according to the temperature of the backlight module.
Illustratively, in a case where the display panel includes N display regions, the step 902 specifically includes: and respectively detecting the temperatures of the N backlight areas through the N groups of temperature sensors.
It is understood that the temperature of each display region of the display panel can be determined according to the corresponding relationship between each display region and the corresponding backlight region.
In some embodiments, the step 902 may further include:
acquiring a preset corresponding relation, wherein the preset corresponding relation is the relation that the temperature difference between the backlight module and the display panel is measured in advance and changes along with the working time of the display device;
and calculating the temperature of the display panel according to the preset corresponding relation and the temperature of the backlight module.
The temperature measured by the temperature sensor is the temperature of the backlight module, not the temperature of the display panel, and therefore, the temperature of the display panel needs to be further calculated.
In this embodiment, the corresponding relationship between the temperatures of the backlight module and the display panel at different working times is measured in advance through experiments, for example, a temperature-time variation table may be established, and the temperature difference between the display panel and the backlight module at different working times of the display device may be recorded as the preset corresponding relationship.
After the temperature of the backlight module is detected and obtained, the temperature of the display panel is inquired and obtained from the temperature-time change table according to the working time of the display device.
In some embodiments, the obtaining the preset corresponding relationship includes:
detecting the temperature of the backlight module as the ambient temperature when the display device does not work through the temperature sensor;
and determining a preset corresponding relation matched with the ambient temperature according to the ambient temperature.
It should be understood that, when the ambient temperatures are different, the temperature difference between the display panel and the backlight module is different, and therefore, in this embodiment, the ambient temperature is further obtained, and the corresponding preset corresponding relationship is called according to the ambient temperature.
During implementation, the display device can be tested in different temperature environments to obtain the change relation of the temperatures of the backlight module and the display panel along with time, the change relation is stored as the preset corresponding relation, and in the working process, the corresponding preset corresponding relation is called according to the ambient temperature, so that the accuracy of temperature estimation of the display panel can be improved.
Step 903: and compensating the color coordinates of the display panel according to a preset compensation table corresponding to the temperature of the display panel.
And finally, compensating the color coordinates of the display device according to a preset compensation table to enable the color coordinates of the display device to be in a preset range, so that the display effect of the display device is relatively stable.
Hereinafter, an exemplary control method of the display device will be further described.
In carrying out the present disclosure, a skilled person finds that the temperature variation of the display panel is related to the operation time of the display device.
Specifically, in an initial stage of the operation of the display device, the temperature of the display panel gradually increases, and after a certain period of operation, the temperature of the display panel tends to be stable.
Referring to table 2, table 2 is a temperature-versus-time table obtained by one test, and the temperature-versus-time table records the corresponding relationship between the temperatures of different positions of the display panel and the backlight module of the display device and the operating time of the display module.
The first row of table 2 represents the position, A, B, C, D represents the measurement results of the temperature sensors located in A, B, C, D four areas of the reflector in fig. 3, respectively, and PA, PB, PC, PD represent the temperatures of four areas of the display panel corresponding to A, B, C, D four areas of the reflector, respectively.
Table 2 the left-most column shows the run time of the device in minutes. The data in the table are the temperature values for the locations in the first row at the corresponding run times in degrees celsius.
Table 2: temperature change with time table
| A | B | C | D | PA | | PC | PD | ||
| 0 | 23.65 | 24.16 | 24.33 | 24.58 | 23.53 | 23.51 | 23.68 | 23.68 | |
| 5 | 44.4 | 50.45 | 49.37 | 56.76 | 33.86 | 32.11 | 33.89 | 34.33 | |
| 10 | 49 | 55.57 | 54.72 | 61.56 | 41.71 | 38.94 | 40.2 | 42.03 | |
| 15 | 51.85 | 58.78 | 58.1 | 64.55 | 46.25 | 41.5 | 44.85 | 46.84 | |
| 20 | 53.85 | 60.78 | 60.23 | 66.44 | 48.7 | 44.46 | 47.2 | 48.87 | |
| 25 | 55.25 | 62.11 | 61.66 | 67.49 | 50.68 | 45.56 | 48.96 | 50.87 | |
| 30 | 56.25 | 62.87 | 62.4 | 68.11 | 51.76 | 46.22 | 49.94 | 52.05 | |
| 35 | 56.8 | 63.39 | 62.92 | 68.63 | 52.18 | 47.11 | 50.22 | 52.43 | |
| 40 | 57.35 | 63.86 | 63.42 | 68.93 | 52.72 | 47.41 | 50.91 | 52.95 | |
| 45 | 57.55 | 64.06 | 63.78 | 68.96 | 52.86 | 48.17 | 51.18 | 52.82 | |
| 50 | 57.7 | 64.09 | 63.87 | 69.17 | 53.02 | 47.98 | 51.06 | 52.47 | |
| 55 | 58 | 64.15 | 63.92 | 69.27 | 53.01 | 47.63 | 51.4 | 53.18 | |
| 60 | 58.6 | 64.18 | 64.01 | 69.2 | 52.94 | 48.4 | 50.76 | 53.2 | |
| 65 | 59.75 | 64.18 | 63.98 | 69.16 | 53.12 | 48.14 | 51.34 | 53.1 | |
| 70 | 60.3 | 64.36 | 64.15 | 69.2 | 53.04 | 48.48 | 51.08 | 53.03 | |
| 75 | 60.6 | 64.23 | 64.03 | 69.1 | 52.85 | 48.66 | 50.79 | 53.09 | |
| 80 | 61 | 64.42 | 64.19 | 69.35 | 53.12 | 48.54 | 51.24 | 53.04 | |
| 85 | 61.3 | 64.51 | 64.32 | 69.45 | 53.06 | 47.81 | 51.46 | 53.25 | |
| 90 | 61.4 | 64.45 | 64.23 | 69.5 | 52.62 | 47.25 | 51.29 | 53.17 | |
| 95 | 61.75 | 64.65 | 64.37 | 69.55 | 52.92 | 48.81 | 50.83 | 53.41 | |
| 100 | 61.7 | 64.55 | 64.27 | 69.31 | 53.04 | 48.43 | 51.19 | 53.18 | |
| 105 | 61.8 | 64.57 | 64.24 | 69.26 | 52.86 | 48.26 | 50.92 | 53 | |
| 110 | 61.85 | 64.6 | 64.3 | 69.36 | 52.81 | 49 | 51.18 | 52.98 | |
| 115 | 61.95 | 64.64 | 64.31 | 69.44 | 52.85 | 49.55 | 50.88 | 53.67 | |
| 120 | 62.1 | 64.63 | 64.27 | 69.42 | 52.86 | 47.9 | 50.98 | 52.94 |
As can be seen from table 2, when the display device is not in operation, the temperatures of the display panel and the backlight module are substantially equal to the room temperature, which is about 24 degrees celsius in this embodiment.
The technical solution of this embodiment is applied to a display device, where the display device in this embodiment may be a conventional display device, and is more suitable for being applied to a stacked-screen display device, for example, the stacked-screen display device in the above-mentioned stacked-screen display device embodiment, it should be understood that, because a light control panel is further disposed between a backlight module and a display panel of the stacked-screen display device, a temperature difference between the display panel and the backlight module is relatively large.
Tests show that after the display panel continuously works for a certain time, about 40 minutes later in the embodiment, the temperature of the display device tends to be relatively stable, and the temperature of the display panel and the temperature of the backlight module have a certain temperature difference, and the temperature difference has a certain difference at different working times.
In order to keep the display effect relatively stable, in the embodiment, ideally, the value of the color coordinate of the control display panel satisfies Wx/Wy: 0.313/0.329, wherein Wx and Wy are coordinate values of color coordinates, respectively, and further, considering that control errors and certain color coordinate differences have small influence on actual display effects, in the present embodiment, a certain fluctuation range is allowed for the ratio of the color coordinates, and the fluctuation range may be different values such as 0.05, 0.005, and the like, for example, when the fluctuation range is 0.005, the value of the color coordinates satisfies Wx/Wy: 0.313 ± 0.005/0.329 ± 0.005, and in the present embodiment, the fluctuation corresponding to the preset range is set to 0.01 or 0.005 to provide a relatively stable display effect.
In this embodiment, different compensation relationships are first set according to different temperatures of the display panel, in this embodiment, the compensation relationships are recorded in a compensation table, and the compensation table may specifically be an Accurate Color Capture table (ACC table).
As shown in fig. 10, in the present embodiment, the temperature is divided into four intervals, and four corresponding compensation tables are set, and in the compensation stages corresponding to different temperature intervals, the desired target compensation results are all within the preset range. In practice, the specific number of divided temperature intervals is not limited thereto.
The compensation tables are measured or calculated in advance and stored in a memory chip, for example, a register, and when the display panel needs to be compensated, the compensation data in the corresponding compensation table is called according to the temperature.
As shown in table 2, at the same time, there is a certain difference between the temperature of the display panel and the temperature of the backlight module. Referring to table 2, the temperature difference between the display panel and the backlight module varies with time.
In this embodiment, the temperature relationship between the display panel and the backlight module is tested in advance at different operation times to form a temperature-time variation table similar to table 2, and the table is stored. In the working process, the temperature of the backlight module is measured by using the temperature sensor, then the stored temperature-time-varying table is called, the temperature of the display panel at the corresponding moment can be determined according to the working time of the display device and the temperature of the backlight module of the display module according to the data in the table, and finally, the corresponding compensation table is called according to the temperature of the display panel to compensate the display effect of the display panel.
For example, the ambient temperature of the backlight module in table 2 is about 24 degrees celsius, the temperature of the backlight area a is about 58.6 degrees celsius when the display device operates for 60 minutes, the temperature of the display panel and the display area PA corresponding to the backlight area a is about 52.94 degrees celsius, and the temperature difference is about 5.66 degrees celsius. In practical application, the ambient temperature is 24 degrees celsius, the actual measured temperature is about 58 degrees celsius after the display device works for 60 minutes, and the temperature of the display area PA is estimated to be about 52.34 degrees celsius according to the temperature difference.
It should be understood that, when the display device operates at different environmental temperatures, the temperature variation trends of the display device are different, in this embodiment, the temperature variation tables of the display panel and the backlight module at different environmental temperatures may be further measured and prepared in advance, the temperature of the backlight module measured when the display device does not operate is taken as the environmental temperature, and the variation table at the corresponding environmental temperature is called according to the environmental temperature, which is helpful to further improve the accuracy of the temperature calculation of the display panel.
Like this, the technical scheme of this embodiment is according to the temperature corresponding relation between different operating time display panel and the backlight unit, the temperature of the definite display panel that can be relatively accurate to can carry out more accurate compensation to display panel, improve compensation effect.
As shown in fig. 11, fig. 11 is a partial data of a compensation table corresponding to a certain temperature, in this embodiment, gray scale values of three different color sub-pixels of red R, green G and blue B corresponding to each gray scale (gamma) at each stage are provided in the compensation table, and according to the gray scale values, corresponding color coordinates can be determined. As shown in fig. 12, the display state of the display panel can be made substantially uniform by adjusting the color coordinates, which contributes to an improvement in the display effect.
The above is only a specific embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present disclosure, and shall be covered by the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a fold screen display device which characterized in that, is including range upon range of setting up backlight unit, accuse light panel and display panel in proper order, backlight unit is including backplate, reflector panel and the diffuser plate that sets up in proper order range upon range of, be provided with a plurality of luminescence units on the reflector panel, the last temperature sensor that is equipped with of backlight unit, temperature sensor is used for detecting backlight unit's temperature, with the basis the temperature is right display panel compensates.
2. A screen stack display device according to claim 1, wherein the reflector has a rectangular shape, the reflector has a first central axis and a second central axis perpendicular to each other, the temperature sensors are disposed on a side of the reflector close to the diffuser plate, and the positions of the temperature sensors are symmetrically distributed about the first central axis and the second central axis.
3. A screen stack display device according to claim 2, wherein the first central axis and the second central axis divide the reflector into four rectangular sub-regions, the temperature sensors being distributed symmetrically in each of the sub-regions about two central axes of the sub-regions.
4. A screen stack display device according to claim 3, wherein the number of the temperature sensors is four, and four of the temperature sensors are respectively located at the geometric centers of the sub-regions.
5. The stacked display device according to any one of claims 1 to 4, wherein the light emitting units are arranged on the light reflection plate at equal intervals in a first direction and a second direction, respectively, to form a light emitting unit array, wherein the first direction and the second direction are different directions, and the temperature sensor is located at a geometric center of the nearest neighboring four light emitting units.
6. A screen stack display device according to claim 5, wherein the positions of two adjacent columns of light emitting units are aligned along the first direction and the second direction; or
The light emitting units in two adjacent columns are arranged in a staggered mode in the first direction and the second direction.
7. The screen-stacked display device according to claim 1, wherein the number of the temperature sensors is four, and the four temperature sensors are respectively located at four vertices of the backlight module.
8. The display device according to claim 7, wherein the light-reflecting plate has a bending portion at an edge of the backlight module, the bending portion is bent away from the back plate, a plastic frame is disposed between the bending portion and the back plate, at least a portion of a surface of the plastic frame extends along surfaces of the back plate and the bending portion and abuts against the back plate and the light-reflecting plate, an accommodating cavity is formed inside the plastic frame, and the temperature sensor is located in the accommodating cavity.
9. The screen stack display device according to claim 8, wherein a backing plate is further included between the back plate and the light reflecting plate, the backing plate includes an edge portion extending to between the bending portion and the back plate, two opposite surfaces of the edge portion are respectively abutted to the rubber frame and the back plate, the temperature sensor is disposed at a portion where the rubber frame is abutted to the edge portion, and the temperature sensor is located on a side surface of the rubber frame away from the back plate.
10. The stacked screen display device according to claim 1, wherein the temperature sensor includes an input terminal for acquiring an input signal, an output terminal for outputting a temperature signal, and a plurality of address terminals for acquiring address signals, the input terminals of the plurality of temperature sensors are connected to input voltage terminals for supplying the same input signal, the output terminals of the plurality of temperature sensors are connected to an output bus, and the temperature sensor acquires an address signal corresponding to each of the temperature sensors through the plurality of address terminals.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023179947.3U CN215181300U (en) | 2020-12-25 | 2020-12-25 | Screen-folding display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023179947.3U CN215181300U (en) | 2020-12-25 | 2020-12-25 | Screen-folding display device |
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| CN215181300U true CN215181300U (en) | 2021-12-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114355649A (en) * | 2021-12-27 | 2022-04-15 | 绵阳惠科光电科技有限公司 | Color temperature compensation device, backlight module and display device |
| WO2022134907A1 (en) * | 2020-12-25 | 2022-06-30 | 京东方科技集团股份有限公司 | Stacked screen display device and control method for display device |
-
2020
- 2020-12-25 CN CN202023179947.3U patent/CN215181300U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022134907A1 (en) * | 2020-12-25 | 2022-06-30 | 京东方科技集团股份有限公司 | Stacked screen display device and control method for display device |
| CN114355649A (en) * | 2021-12-27 | 2022-04-15 | 绵阳惠科光电科技有限公司 | Color temperature compensation device, backlight module and display device |
| CN114355649B (en) * | 2021-12-27 | 2024-01-12 | 绵阳惠科光电科技有限公司 | Color temperature compensation device, backlight module and display device |
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