Display module, brightness compensation method, and display device

Abstract

The application discloses a display module, a brightness compensation method and a display device. The display module comprises a light-emitting plate, a back plate and a brightness compensation unit. The light-emitting plate is provided with a plurality of spaced light-emitting units. The back plate is arranged at a position spaced from the light-emitting plate and located on a light-emitting surface away from the light-emitting units. The brightness compensation unit comprises a control part and a light-emitting part. The light-emitting part is arranged on the back plate, and the light-emitting surface of the light-emitting part faces a spacing position of adjacent light-emitting units. The control part is connected to the light-emitting part to control the light-emitting part to be lighted up in a gap in which the light-emitting unit is turned off. The technical scheme of the application can compensate for the case that the light-emitting efficiency of the display device is reduced, and ensure that the display device can normally display.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of display, and particularly relates to a display module, a brightness compensation method and a display device. BACKGROUND

[0002] An organic electroluminescent display (OLED) is a new generation of display. The OLED display has many advantages over liquid crystal displays, such as self-emission, fast response, wide viewing angle, color saturation, etc.

[0003] However, water oxygen in the air can oxidize the active metal of the cathode of the OLED display, and can also chemically react with the organic material, which can cause the OLED display to fail. Therefore, as the OLED display device is used, the light-emitting efficiency of the OLED display device will decrease, and the display brightness will be insufficient. SUMMARY

[0004] The purpose of the present application is to provide a display module, a brightness compensation method and a display device, which can effectively compensate for the decrease in the light-emitting efficiency of the display device and ensure that the display can display normally.

[0005] Other characteristics and advantages of the present application will become apparent from the following detailed description, or will be learned by practice of the present application.

[0006] According to one aspect of an embodiment of the present application, the present application provides a display module, comprising:

[0007] A light-emitting plate provided with a plurality of spaced-apart light-emitting units;

[0008] A back plate spaced apart from the light-emitting plate, the back plate being located on the side of the light-emitting surface facing away from the light-emitting units;

[0009] A brightness compensation unit, the brightness compensation unit comprising a control part and a light-emitting part, the light-emitting part being provided on the back plate, and the light-emitting surface of the light-emitting part facing the spaced-apart positions of the adjacent light-emitting units, the control part being connected to the light-emitting part to control the light-emitting part to be lit up in the gap when the light-emitting units are extinguished.

[0010] In one aspect, the light-emitting part is provided one-to-one corresponding to the light-emitting units, and the light-emitting color of the light-emitting part is the same as the light-emitting color of the corresponding light-emitting units.

[0011] In one aspect, the control part comprises a data processing part and a control switch, the data processing part being connected to the control switch, and the control switch being connected to the light-emitting part;

[0012] The data processing unit is configured to compare the data signal of the light emitting unit with the gray data of the light emitting unit and generate a control signal, and the control switch is configured to control the light emitting unit to be turned on or turned off in response to the control signal.

[0013] In one aspect, the data processing unit comprises a flip-flop, a first comparator and a second comparator, the flip-flop is configured to receive the data signal of the light emitting unit, the output of the flip-flop is connected to the first comparator, the second comparator is configured to receive the gray data of the light emitting unit, the output of the second comparator is connected to the first comparator, the output of the first comparator is connected to the control switch, and the control signal is a pulse width modulation signal.

[0014] In one aspect, the control switch is a multiplexing switch, and the multiplexing switch is provided with a plurality of outputs, each of the outputs is connected to at least one of the light emitting units.

[0015] In one aspect, the back plate is divided into a plurality of control areas, each of the control areas is provided with a plurality of light emitting units, and the light emitting units of each of the control areas are connected to an output of the same multiplexing switch.

[0016] In addition, in order to solve the above problems, the application further provides a brightness compensation method, which is applied to a display module, the display module comprising: a light emitting plate, a back plate and a brightness compensation unit, the light emitting plate is provided with a plurality of light emitting units which are spaced apart; the back plate is spaced apart from the light emitting plate and located on a light emitting surface side away from the light emitting units; the brightness compensation unit comprises a control unit and a light emitting unit, the light emitting unit is arranged on the back plate, and the light emitting surface of the light emitting unit faces the spaced positions of adjacent light emitting units, and the control unit is connected to the light emitting unit.

[0017] The brightness compensation method comprises:

[0018] controlling the light emitting unit to be turned off;

[0019] controlling the light emitting unit to be turned off;

[0020] In one aspect, the step of controlling the light emitting unit to be turned off comprises:

[0021] acquiring the data signal of the light emitting unit;

[0022] detecting the current size of the light emitting unit, determining the gray data based on the current size, comparing the data signal with the gray data, and generating a control signal for controlling the light emitting unit;

[0023] In one aspect, the step of controlling the light-emitting part to emit light to compensate for the luminance of the light-emitting unit comprises:

[0024] acquiring a data signal of the light-emitting unit;

[0025] detecting the luminance of the light-emitting unit, converting the luminance of the light-emitting unit into gray scale data, comparing the data signal and the gray scale data to generate a control signal for controlling the light-emitting part.

[0026] In addition, to solve the above problems, the application also provides a display device, which comprises a protective shell and a display module as described above, wherein the protective shell forms a protection space, and the display module is arranged in the protection space of the protective shell.

[0027] In the application, the light-emitting units on the light-emitting plate emit light, and the light-emitting units collectively emit light to form a display picture. The display picture is not continuous, but is displayed frame by frame. That is, the light-emitting units also do not emit light continuously, and are in an extinguished state between two frames of pictures. The light-emitting part of the luminance compensation unit is lit by using the time when the light-emitting units are extinguished. By using the visual persistence effect, the light of the light-emitting part can be superimposed on the light of the light-emitting units, so as to compensate for the decrease in the light-emitting efficiency of the display device and ensure that the display device can normally display.

[0028] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0029] The drawings incorporated into the specification and forming a part of the specification, show embodiments consistent with the application, and together with the specification, serve to explain the principles of the application. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0030] Figure 1 The structure of the display module of the application is schematically shown.

[0031] Figure 2 The signal transmission of the data processing part of the application is schematically shown.

[0032] Figure 3 The structure of the control switch of the application is schematically shown.

[0033] Figure 4 The structure of the control area on the back plate of the application is schematically shown.

[0034] Figure 5 A timing control diagram of the brightness compensation method in the present application is schematically shown.

[0035] Figure 6 Another timing control diagram of the brightness compensation method in the present application is schematically shown.

[0036] Figure 7 A flow chart of the brightness compensation method in the present application is schematically shown.

[0037] Figure 8 An embodiment of the brightness compensation method in the present application is schematically shown.

[0038] Figure 9 Another embodiment of the brightness compensation method in the present application is schematically shown.

[0039] The reference signs are explained as follows:

[0040] 100, light emitting plate; 200, back plate; 300, brightness compensation unit;

[0041] 110, light emitting unit; 210, control area; 310, control part; 320, light emitting part;

[0042] 311, data processing part; 312, control switch; 3111, flip-flop; 3112, first comparator; 3113, second comparator. DETAILED DESCRIPTION

[0043] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of example implementations to those skilled in the art.

[0044] Embodiment one

[0045] Referring to Figure 1 As shown, the present application provides a display module, which comprises a light emitting plate 100, a back plate 200 and a brightness compensation unit 300.

[0046] The light-emitting panel 100 is provided with a plurality of light-emitting units 110 arranged at intervals; the light-emitting panel 100 is provided with a circuit layer, and the light-emitting units 110 can be fixed on the circuit layer by welding, for example, the anode and cathode of the light-emitting unit 110 are connected to different circuit layers respectively, so that the current flows between the anode and cathode of the light-emitting unit 110, and the light-emitting unit 110 can be lit. The light-emitting unit 110 can be an OLED display device, in addition, the light-emitting unit 110 can also be an LED (light emitting diode) or a Micro-LED (micro light emitting diode). The light-emitting units 110 can be arranged at equal intervals on the light-emitting panel 100, for example, in a matrix distribution in the form of rows and columns.

[0047] The back plate 200 is arranged at intervals with the light-emitting panel 100, and the back plate 200 is located on the side away from the light-emitting surface of the light-emitting unit 110; the back plate 200 is usually arranged on the back of the light-emitting panel 100, that is, the side away from the light-emitting surface of the light-emitting unit 110. The back plate 200 can also be used to protect the light-emitting panel 100 and reduce the damage of the light-emitting panel 100; the back plate 200 can be a plastic plate or a metal plate.

[0048] The brightness compensation unit 300 includes a control part 310 and a light-emitting part 320; the light-emitting part 320 is arranged on the back plate 200, and the light-emitting surface of the light-emitting part 320 faces the interval position of the adjacent light-emitting unit 110; the control part 310 is connected to the light-emitting part 320 to control the light-emitting part 320 to be lit in the interval of the light-emitting unit 110 being extinguished.

[0049] The light-emitting part 320 can be arranged on the side of the back plate 200 facing the light-emitting panel 100, and the interval area of the light-emitting panel 100 and the back plate 200 is used. The light emitted by the light-emitting part 320 can also pass through the gap between two light-emitting units 110 through the interval position between the light-emitting units 110. Generally, the light-emitting surface of the light-emitting unit 110 is large, and the light-emitting surface area of the light-emitting part 320 is small, which can fully utilize the interval position between the light-emitting units 110, and can also avoid the individual light-emitting part 320 being too large and saving space. For example, the light-emitting surface of the light-emitting part 320 is one-fifth or one-third of the light-emitting surface of the light-emitting unit 110.

[0050] In this embodiment, the light emitting units 110 on the light emitting panel 100 emit light, and the light emitting units 110 collectively emit light to form a display picture. The display picture is not persistent, but is displayed frame by frame. That is, the light emitting units 110 also do not emit light continuously, and the light emitting units 110 are in an extinguished state between two frames of pictures. The light emitting part 320 of the light brightness compensation unit 300 is lit up using the time when the light emitting units 110 are extinguished. Using the visual persistence effect, the light of the light emitting part 320 can be superimposed on the light of the light emitting units 110, thereby compensating for the decrease in the light emitting efficiency of the display device and ensuring that the display can normally display.

[0051] The visual persistence phenomenon is that the vision caused by light on the retina remains for a period of time after the light stops acting. The reason is caused by the reaction speed of the optic nerve. The vision is actually imaged by the lens of the eye, the photosensitive cells sense light, and the light signal is converted into nerve current and transmitted back to the brain to cause human vision. The photosensitive cells sense light by some photosensitive pigments, and the formation of the photosensitive pigments takes a certain time, which forms the mechanism of visual persistence. That is, when the light of the light emitting units 110 has not formed a display picture in the human vision, the light of the light emitting part 320 has already been emitted, and the two can be superimposed together to form a display picture.

[0052] In addition, the technical solution of the present application can avoid the light emitting part 320 and the light emitting unit 110 emitting light at the same time, reduce the size of the current provided to the display module at the same time, reduce the heat generated by the display module at the same time, facilitate heat dissipation, and also reduce the current peak value required by the display module at the same time.

[0053] The light emitting units 110 usually have red, green, and blue colors. One light emitting unit 110 can be understood as one display sub-pixel, and generally three kinds of light emitting units 110 form one display pixel. Different light brightness ratios between the three light emitting units 110 can make the display pixel form different colors. In order to improve the pertinence of compensation, in an embodiment of the present application, the light emitting part 320 is arranged in one-to-one correspondence with the light emitting unit 110, and the light emitting color of the light emitting part 320 is the same as the light emitting color of the corresponding light emitting unit 110.

[0054] Therefore, the red light emitting unit 110 is provided with a red light emitting part 320 in correspondence, the green light emitting unit 110 is provided with a green light emitting part 320 in correspondence, and the blue light emitting unit 110 is provided with a blue light emitting part 320 in correspondence. The light emitting principle of the light emitting part 320 can be the same as the light emitting principle of the light emitting unit 110, such as both being OLED display devices or both being Micro-LED display devices. This can ensure that the colors of the emitted light are as same as possible and reduce color deviation.

[0055] In one embodiment of the present application, the control unit 310 can control the lighting and extinguishing of the light-emitting unit 320. The control unit 310 includes a data processing unit 311 and a control switch 312. The data processing unit 311 is connected to the control switch 312, which is connected to the light-emitting unit 320. The data processing unit 311 is used to compare the data signal of the light-emitting unit 110 with the grayscale data of the light-emitting unit 110 and generate a control signal. The control switch 312 responds to the control signal to control the lighting and extinguishing of the light-emitting unit 320.

[0056] The data signal can be understood as the data voltage provided to the light-emitting unit 110. The magnitude of the data voltage is related to the brightness of the light-emitting unit 110. The light-emitting unit 110 is connected to the data line Data and the scan line Scan. The scan line Scan is used to provide a scan signal, which can control the response switch connected to the light-emitting unit 110 and control the conduction of the response switch. The data line Data provides a data signal. After the response switch of the light-emitting unit 110 is turned on, the data signal is applied to the light-emitting unit 110 through the response switch.

[0057] Generally, the greater the data voltage, the higher the brightness of the light-emitting unit 110 that needs to be illuminated. Conversely, the smaller the data voltage, the lower the brightness of the light-emitting unit 110 that needs to be illuminated. Grayscale data can be understood as a digital embodiment of the luminous brightness of the light-emitting unit 110. As the light-emitting unit 110 is used, the brightness of the light-emitting unit 110 will attenuate to a certain extent. After receiving the data signal, the brightness emitted by the light-emitting unit 110 will be lower than the expected value, which is reflected in the grayscale data as a decrease in grayscale data. Therefore, comparing the data signal and the grayscale data can reflect the situation where the grayscale data is lower than expected, and the attenuation amount of the light-emitting unit 110 can be obtained. Based on the attenuation amount, it is determined how much brightness the light-emitting part 320 needs to compensate.

[0058] The brightness of the light-emitting unit 320 that needs to be compensated is achieved by controlling the lighting time of the light-emitting unit 320 through a control signal. In other words, the attenuation of the light-emitting unit 110 is compensated by the lighting time of the light-emitting unit 320. The longer the light-emitting unit 320 is on, the more light is emitted, and the more light is compensated for the light-emitting unit 110. Conversely, the shorter the lighting time of the light-emitting unit 320, the less light is compensated for the corresponding light-emitting unit 110.

[0059] See Figure 2As shown in another embodiment of the present application, the data processing unit 311 comprises a flip-flop 3111, a first comparator 3112 and a second comparator 3113, the flip-flop 3111 receives the data signal of the light emitting unit 110, the output of the flip-flop 3111 is connected to the first comparator 3112, the second comparator 3113 receives the gray data of the light emitting unit 110, the output of the second comparator 3113 is connected to the first comparator 3112, and the output of the first comparator 3112 is connected to the control switch 312, and the control signal is a pulse width modulation signal.

[0060] The data forms of the data signal and the gray data are different, and the two are difficult to compare directly. The flip-flop 3111 and the second comparator 3113 can respectively convert the data signal and the gray data into signals recognizable by the first comparator 3112, so as to complete the comparison and judgment of the two, and then output high level or low level to complete the control of the control switch 312. The gray data is provided to the positive input end of the second comparator, and a reference data is provided to the negative input end, so as to compare the gray data with the reference data.

[0061] Further, the flip-flop 3111 can be a Schmitt trigger. The Schmitt trigger is a comparator circuit containing positive feedback. For a standard Schmitt trigger 3111, when the input voltage is higher than the positive threshold voltage, the output is high; when the input voltage is lower than the negative threshold voltage, the output is low; when the input is between the positive and negative threshold voltages, the output does not change, that is, the threshold voltage corresponding to the output transition from high level to low level or from low level to high level is different. Only when the input voltage changes enough, the output will change, so this component is named as flip-flop 3111. This double-threshold action is called hysteresis, indicating that the Schmitt trigger has memory. In the embodiment, the flip-flop 3111 can stabilize the data signal and compare the data signal with the threshold voltage.

[0062] In addition, in the present application, it is usually necessary to compare two data items to determine whether they are equal or to determine their size relationship and arrangement order. The circuit or device capable of realizing this comparison function is called a comparator. The comparator is a circuit that compares an analog voltage signal with a reference voltage. The two inputs of the comparator are analog signals, and the output is a binary signal 0 or 1, which remains constant when the difference between the input voltages increases or decreases and the positive and negative signs do not change.

[0063] Referring to Figure 3 As shown in an embodiment of the present application, the control switch 312 is a multiplexing switch, and the multiplexing switch is provided with a plurality of output ends, and each output end is connected to at least one light emitting unit 320.

[0064] The multiplex switch is a kind of implementation of data selector, and the multiplex switch is a MUX (multiplexer) switch.The working principle of the MUX switch is based on the concept of multiplexing, which allows selection and switching between multiple input signals.

[0065] Referring to Figure 4 As shown in the embodiment, the backboard 200 is divided into a plurality of control areas 210, and each control area 210 is provided with a plurality of light emitting parts 320, and the light emitting parts 320 of each control area 210 are connected to the output end of the same multiplex switch.

[0066] That is, the plurality of light emitting parts 320 of the same control area 210 can emit light or extinguish at the same time. The control signal is a pulse width modulation signal (PWM).

[0067] Referring to Figure 5 As shown, by receiving the data signal, the Schmidt trigger 3111 identifies and outputs high and low levels to the first comparator 3112, and the second comparator 3113 identifies the gray data and outputs high and low levels to the first comparator 3112. Thus, the first comparator 3112 outputs the PWM control signal to control the opening and closing time of each control area 210. The PWM control signal is connected to the light emitting part 320 of each control area 210.

[0068] Referring again to Figure 4 and Figure 5 As shown, for example, the control area 210 of the backboard 200 is divided into four subareas, which are D1, D2, D3 and D4. Then the PWM control signal is connected to the four subareas through the MUX switch, and the opening and closing time of the four control areas 210 is controlled by the PWM control signal. It can be seen that the compensation time of the D4 subarea is the longest, the compensation time of the D2 subarea is shorter, and the compensation time of the D1 and D3 subareas is equal. Of course, this embodiment is only an example. The specific compensation time can be adjusted according to the brightness decay of the light emitting unit 110.

[0069] It should be noted that in the embodiment, the control switch 312 can control the light emitting part 320 of each subarea to light up at the same time, or control the light emitting part 320 of each subarea to light up while the light emitting part 320 of another subarea is extinguished.

[0070] Further, referring to Figure 5 It can be seen that each control area is provided with a control switch, and four control switches can be provided for the four subareas to control the light emitting parts of the four subareas to light up at the same time.

[0071] Referring to Figure 6In addition, a multiplexing switch can be provided, and the multiplexing switch is provided with four output ends, and each output end is connected with the light emitting part of one control area. In the off time of the light emitting unit, the light emitting part of each control area is separately lighted.

[0072] It is further needed to be explained that in the related art of the present application, the display screen of the display can have uneven brightness distribution. Therefore, the technical solution of the present application divides the back plate 200 into multiple control areas 210, and the light emitting uniformity of the display can be detected. The light emitting time of the light emitting part 320 can be increased for the position with low brightness of the display, so as to compensate the position with low brightness of the display. The light emitting time of the light emitting part 320 can be reduced for the position with high brightness.

[0073] That is to say, the brightness between the light emitting units 110 of each sub-area can also be compared, so as to determine which sub-area has low brightness of the light emitting unit 110. Through the setting of the brightness compensation unit 300, more compensation is performed on the sub-area with low brightness, so as to balance the light emitting brightness of the display and improve the uniformity of the display brightness.

[0074] Embodiment Two

[0075] Referring to Figure 7 The present application also provides a brightness compensation method, which is applied to a display module. The display module comprises a light emitting plate 100, a back plate 200 and a brightness compensation unit 300. The light emitting plate 100 is provided with multiple light emitting units 110 which are spaced apart. The back plate 200 is spaced apart from the light emitting plate 100 and is located on the side of the light emitting surface which is away from the light emitting units 110. The brightness compensation unit 300 comprises a control part 310 and a light emitting part 320. The light emitting part 320 is arranged on the back plate 200, and the light emitting surface of the light emitting part 320 faces the spaced position of the adjacent light emitting unit 110. The control part 310 is connected with the light emitting part 320.

[0076] The brightness compensation method comprises the following steps.

[0077] In the present application, the display process of the display screen is displayed by frames. For example, 24 frames or 30 frames can be displayed in 1 second. Each frame can be understood as one display screen, and each display screen is spaced apart by a certain time. That is to say, the light emitting unit 110 needs to be turned off multiple times in 1 second. The number of times of turning off is directly related to the refresh rate of the display frame. For example, the light emitting unit 110 needs to be turned off 24 times for the refresh rate of 24 frames.

[0078] Step S20, when the light emitting unit 110 is off, the light emitting part 320 is controlled to be lighted, compensating the brightness of the light emitting unit 110. The light emitting unit 110 is off to the next lighted interval for a certain time, making full use of the time of the light emitting unit 110 each time it is off. For example, after receiving the off signal of the light emitting unit 110, the control part 310 can control the light emitting part 320 to be lighted. According to the principle of visual persistence, the light of the light emitting unit 110 and the light of the light emitting part 320 are superimposed on the human eye visual nerve, thereby compensating for the insufficient brightness of the light emitting unit 110.

[0079] In the brightness compensation method of the embodiment, the light emitting unit 110 on the light emitting plate 100 is controlled to emit light, and a plurality of light emitting units 110 jointly emit light to form a frame image. Since the display image is not continuous, it is displayed by frame. That is, the light emission of the light emitting unit 110 is also not continuous, and the light emitting unit 110 is in an off state between two frames. The light emitting part 320 of the brightness compensation unit 300 is lighted during the off time of the light emitting unit 110. According to the visual persistence effect, the light of the light emitting part 320 and the light of the light emitting unit 110 can be superimposed on the human eye, thereby compensating for the decrease in the light emitting efficiency of the display device and ensuring that the display can be normally displayed.

[0080] In addition, the brightness compensation method of the present application can also be compensated in zones, and the light-on time of the light emitting part of each corresponding control zone is controlled to adjust the brightness corresponding to each control zone, so that the brightness of the display is more uniform.

[0081] Furthermore, in combination with Figure 5 In order to reduce the working time of the data processing part and reduce the data comparison process before each light-on of the light emitting unit, the light-on time of the light emitting part in a certain time after the completion of the data comparison is controlled to be lighted according to the corresponding time. For example, the brightness difference of the display image in one second is not large, and the light-on time of the light emitting part is the same between the frame intervals in one second. That is, in one second, the light emitting part corresponding to each control zone is lighted in a certain period and is cyclically lighted. It can be seen from Figure 5 It can be seen that the period between the first rising edge and the second rising edge of the D1 control zone is a period, and the light emitting parts of the D2 control zone, the D3 control zone and the D4 control zone are also lighted in a certain period.

[0082] Referring to Figure 8 In the present application, there are at least two embodiments for the process of controlling the light-on of the light emitting part 320, one of which is that the step of controlling the light-on of the light emitting part 320 to compensate for the brightness of the light emitting unit 110 comprises:

[0083] Step S210, obtaining the data signal of the light emitting unit 110; the control unit 310 can connect the data line, receive the data signal of the data line, and complete the detection of the data signal. Of course, the control unit 310 does not affect the normal display of the light emitting unit 110 in the process of collecting the data signal.

[0084] Step S220, detecting the current size of the light emitting unit 110, determining the gray data based on the current size, comparing the data signal and the gray data, and generating the control signal of the light emitting unit 320; generally, the current size of the light emitting unit 110 can reflect the brightness of the light emitting unit 110. The greater the current flowing through the light emitting unit 110, the higher the brightness of the light emitting unit 110. The smaller the current flowing through the light emitting unit 110, the lower the brightness of the light emitting unit 110.

[0085] The control unit 310 can collect the current flowing through the light emitting unit 110, and determine the gray data representing the brightness of the light emitting unit 110 by comparing the current. The gray data can be pre-stored in the control unit 310, such as different currents corresponding to different gray data, and a gray data comparison table is generated in advance. After detecting the current of the light emitting unit 110, the gray data is obtained directly by table lookup, that is, the brightness of the light emitting unit 110 is obtained.

[0086] In the comparison of the data signal and the gray data, generally, the brightness of the light emitting unit 110 does not decay under the condition that the light emitting unit 110 emits light normally. By comparison, it can be concluded that the gray data does not meet the data signal due to the brightness decay of the light emitting unit 110, and the difference between the two is obtained. According to the difference between the two, the brightness that the light emitting unit 320 needs to supplement is obtained. In this way, the data of the light emitting unit 110 is collected indirectly, and the normal work of the light emitting unit 110 is less affected.

[0087] In addition, the data signal is usually a voltage value, and the gray data is a value representing brightness, which is usually difficult to compare directly, so the data signal and the gray data can be converted. For example, the conversion and comparison of data can be completed by Schmidt trigger 3111 and comparator.

[0088] Referring to Figure 9 For another embodiment of the control light emitting unit 320 lighting process, the step of controlling the light emitting unit 320 to light and compensating the brightness of the light emitting unit 110 includes:

[0089] Step S211, obtaining the data signal of the light emitting unit 110; similarly, as in the above embodiment, the control unit 310 can connect the data line, receive the data signal of the data line, and complete the detection and collection of the data signal.

[0090] Step S221, detecting the brightness of the light emitting unit 110, converting the brightness of the light emitting unit 110 into gray scale data, comparing the data signal and the gray scale data, and generating a control signal for controlling the light emitting part 320. For example, the brightness compensation unit 300 further comprises a light sensor structure, a light sensor, etc. Corresponding to each control area 210 of the back plate 200, a light sensor can be arranged on the light emitting plate 100. The brightness of the light emitting unit 110 can be directly detected by the light sensor. Then the brightness of the light emitting unit 110 is converted into gray scale data, so that the detected gray scale is more accurate.

[0091] Embodiment three

[0092] The application also provides a display device, which comprises a protective shell and a display module as described above, and the protective shell forms a protection space, and the display module is arranged in the protection space of the protective shell. The protective shell can be understood as a frame, which surrounds the protection space, and the protection by the frame can reduce the edge of the display module from being bumped.

[0093] The display device of the embodiment, the light emitting unit 110 on the light emitting plate 100 emits light, and the plurality of light emitting units 110 jointly emit light to form a display picture, and the display picture is not continuous, and the display picture is displayed frame by frame, and the display is switched frame by frame. Therefore, the light emitting of the light emitting unit 110 is also not continuous, and the light emitting unit 110 is in an extinguished state between two frames of pictures. The light emitting part 320 of the brightness compensation unit 300 is lit by using the extinguished time of the light emitting unit 110. Based on the visual persistence effect, the light of the light emitting part 320 and the light of the light emitting unit 110 can be superimposed on the visual nerve of the human eye, so as to compensate for the decrease of the light emitting efficiency of the display device, improve the brightness of the display in front of the human eye, and make the display picture seen by the human eye normal.

[0094] In addition, the display device of the application can also control the light emitting time of the light emitting part by partition, adjust the non-uniform brightness of the display device, and improve the brightness uniformity of the display device.

[0095] The specific implementation and advantages of the display device are described above in the display module, and will not be described here.

[0096] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. The application is intended to cover any variations, uses or adaptive changes of the application following the general principles of the application and including known or customary practices in the art not specifically disclosed.

[0097] It is to be understood that the application is not limited to the precise construction already described above and shown in the drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application should only be limited by the claims appended hereto.

Claims

1. A display module, characterized in that: The display module includes: A light-emitting panel, wherein the light-emitting panel is provided with a plurality of light-emitting units distributed at intervals; a back plate, the back plate being spaced apart from the light-emitting plate and being located on a side away from the light-emitting surface of the light-emitting unit; a brightness compensation unit, the brightness compensation unit comprising a control unit and a light-emitting unit, the light-emitting unit being disposed on the back panel, with a light-emitting surface of the light-emitting unit facing a position spaced apart from the adjacent light-emitting unit, the control unit being connected to the light-emitting unit to control the light-emitting unit to light up during intervals when the light-emitting unit is off; Wherein, the control unit includes a data processing unit and a control switch, the data processing unit is connected to the control switch, and the control switch is connected to the light-emitting unit; The data processing unit is used to compare the data signal of the light-emitting unit with the grayscale data of the light-emitting unit and generate a control signal. The control switch responds to the control signal to control the lighting or extinguishing of the light-emitting unit.

2. The display module according to claim 1, wherein: The light emitting parts are arranged in a one-to-one correspondence with the light emitting units, and the light emitting color of the light emitting parts is the same as the light emitting color of the corresponding light emitting units.

3. The display module according to claim 1, wherein: The data processing unit includes a trigger, a first comparator and a second comparator. The trigger receives the data signal of the light-emitting unit, the output end of the trigger is connected to the first comparator, the second comparator receives the grayscale data of the light-emitting unit, the output end of the second comparator is connected to the first comparator, and the output end of the first comparator is connected to the control switch. The control signal is a pulse width modulation signal.

4. The display module according to claim 1, wherein: The control switch is a multiplex switch, and the multiplex switch is provided with a plurality of output ends, and each of the output ends is connected to at least one of the light-emitting parts.

5. The display module according to claim 4, wherein: The back panel is divided into a plurality of control areas, each of the control areas is provided with a plurality of the light-emitting parts, and the light-emitting parts of each control area are connected to the output end of the same multiplexing switch.

6. A brightness compensation method, characterized in that: The brightness compensation method is applied to a display module, which includes: a light-emitting panel, a back panel, and a brightness compensation unit. The light-emitting panel is provided with a plurality of light-emitting units distributed at intervals. The back panel is spaced apart from the light-emitting panel and is located on a side away from the light-emitting surfaces of the light-emitting units. The brightness compensation unit includes a control unit and a light-emitting unit. The light-emitting unit is provided on the back panel, and the light-emitting surface of the light-emitting unit faces the interval position of the adjacent light-emitting unit. The control unit is connected to the light-emitting unit. The brightness compensation method comprises: Controlling the light-emitting unit to turn off; During the interval when the light-emitting unit is off, the light-emitting portion is controlled to light up to compensate for the brightness of the light-emitting unit; Wherein, the control unit includes a data processing unit and a control switch, the data processing unit is connected to the control switch, and the control switch is connected to the light-emitting unit; The data processing unit is used to compare the data signal of the light-emitting unit with the grayscale data of the light-emitting unit and generate a control signal. The control switch responds to the control signal to control the lighting or extinguishing of the light-emitting unit.

7. The brightness compensation method according to claim 6, wherein: The step of controlling the light-emitting portion to light up and compensating the brightness of the light-emitting unit includes: Acquiring a data signal of the light-emitting unit; The current magnitude of the light emitting unit is detected, grayscale data is determined based on the current magnitude, the data signal and the grayscale data are compared, and a control signal for controlling the light emitting portion is generated.

8. The brightness compensation method according to claim 6, wherein: The step of controlling the light-emitting portion to light up and compensating the brightness of the light-emitting unit includes: Acquiring a data signal of the light-emitting unit; The brightness of the light-emitting unit is detected, the brightness of the light-emitting unit is converted into grayscale data, the data signal and the grayscale data are compared, and a control signal for controlling the light-emitting portion is generated.

9. A display device, characterized in that: The display device includes a protective shell and the display module according to any one of claims 1 to 5, wherein the protective shell forms a protective space, and the display module is disposed in the protective space of the protective shell.

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