Organic light-emitting display module and signal control method

Abstract

The invention discloses an organic light-emitting display module and a signal control method, and relates to the technical field of display, the organic light-emitting display module specifically comprises a main control chip, a signal processing module and a light-emitting module, the main control chip is connected with the signal processing module, the main control chip transmits display data and a control signal to the signal processing module, and the signal processing module is connected with the light-emitting module. The signal processing module is connected with the light-emitting module, the signal processing module receives and converts a transmission signal of the main control chip, generates a driving signal and transmits the driving signal to the light-emitting module, the light-emitting module correctly displays an image, and the light-emitting module comprises a module body and a protection assembly wrapping the module body. According to the organic light-emitting display module and the signal control method, the protection assembly is used for cooling the module body, the heat dissipation speed of the module body is increased, the module body is convenient to use, the module body can be pressed, the connection reliability of all layers in the module body is improved, and the stripping phenomenon is avoided.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to an organic light emitting display module and a signal control method. Background Art

[0002] The organic light-emitting device of the organic light-emitting display module (OLED) consists of a multi-layer structure, including an anode (usually transparent indium tin oxide ITO), a cathode (metal electrode), and an organic functional layer sandwiched in between. The organic functional layer usually includes a hole transport layer (HTL), an emitting layer (EML), and an electron transport layer (ETL). The working principle of the existing organic light-emitting display module is based on the electroluminescence phenomenon of organic materials driven by an electric field. When a voltage is applied between the anode and the cathode, electrons are injected from the cathode into the electron transport layer, and holes are injected from the anode into the hole transport layer. Electrons and holes migrate to the emitting layer through the electron transport layer and the hole transport layer, respectively, and meet in the emitting layer to form excitons (electron-hole pairs). When the excitons recombine in the emitting layer, they release energy, excite the luminescent molecules, and return them from the excited state to the ground state, and release energy in the form of photons to generate visible light. The light generated by the emitting layer is output through the transparent anode (ITO), and users can see the display content.

[0003] However, since the electrons and holes in the organic light-emitting device form excitons in the light-emitting layer, release energy and emit light, and the light-emitting material of the organic light-emitting device is composed of organic + compounds, the excitons will accelerate the aging of the organic material during the formation process, and the heat generated when the OLED module is working will further accelerate the aging of the organic material, affecting the service life of the organic light-emitting display module; in the manufacturing process of the organic light-emitting device, although strict cleaning and pretreatment are carried out, trace amounts of moisture or oxygen may still remain on the surface of some materials (such as ITO substrates), which will lead to chemical reactions at the metal cathode organic interface of the OLED module - the electrochemical reaction between water, oxygen and aluminum will release trace amounts of gas, which can easily cause the metal cathode to peel off from the organic layer, affecting the use of the OLED module, and displaying the same image for a long time is prone to screen burn-in problems; based on this, the present application proposes an organic light-emitting display module and a signal control method. Summary of the invention

[0004] The present invention provides an organic light-emitting display module and a signal control method, which solve the problems mentioned in the above background technology that the heat generated during operation will affect the service life of the organic light-emitting display module; the metal cathode is easily separated from the organic layer due to the trace gas generated when water, oxygen and aluminum react; and the same image is displayed for a long time, which is prone to screen burn-in.

[0005] The present invention provides the following technical solutions: an organic light-emitting display module, comprising a main control chip, a signal processing module and a light-emitting module, wherein the main control chip is connected to the signal processing module, the main control chip transmits display data and control signals to the signal processing module, the signal processing module is connected to the light-emitting module, the signal processing module receives and converts the signal transmitted by the main control chip, generates a driving signal and transmits it to the light-emitting module, and the light-emitting module correctly displays an image; the signal processing module comprises a contrast module, a counting module, a signal adjustment module and a conveying module, the contrast module is connected to the counting module, the signal adjustment module and the conveying module, and the signal adjustment module is connected to the conveying module; The light-emitting module comprises a module body and a protective component for wrapping the module body; the protective component comprises a bottom plate connected to the bottom of the module body, a pressure cover connected to the top of the module body and a cooling frame connecting the bottom plate and the pressure cover, the module body is located in the inner cavity of the cooling frame, the cooling frame comprises a first heat transfer frame, a second heat transfer frame and a heat dissipation cabin from the inside to the outside, the top of the first heat transfer frame and the outer ring of the top of the module body are both connected to the pressure cover, the bottom of the first heat transfer frame is connected to the bottom end of the module body through a first elastic pad, the inner wall of the first heat transfer frame is evenly inlaid with adsorption blocks, the second heat transfer frame is connected to the bottom end of the module body, the second heat transfer frame and the heat dissipation cabin are both connected to the bottom of the pressure cover through a second elastic pad, the heat dissipation cabin is connected to the outer ring at the top of the bottom plate, and the inner cavity of the heat dissipation cabin is connected to the inner cavity of the bottom plate.

[0006] Preferably, the signal processing module further includes a receiving module and a conversion module, the receiving module is connected to the main control chip, and the receiving module and the conversion module are connected to the comparison module.

[0007] Preferably, the module body comprises a substrate, on which an anode plate, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer and a cathode plate are sequentially arranged.

[0008] Preferably, the outer ring of the cathode plate top is connected to the bottom of the gland, the first heat transfer frame is connected to the top of the substrate via an elastic pad, and the bottom of the second heat transfer frame is connected to the top of the substrate.

[0009] Preferably, the heat dissipation cabin is a hollow structure, heat dissipation fins are evenly arranged on one side of the inner cavity of the heat dissipation cabin close to the second heat transfer frame, and a micro temperature sensor is arranged in the heat dissipation cabin.

[0010] Preferably, a cooling fan is provided on one side of the base plate, an air inlet is provided on the side of the cooling cabin away from the cooling fan, a connecting hole is provided at the bottom of the inner cavity of the cooling cabin away from the air inlet, and the inner cavity of the base plate is connected with the inner cavity of the cooling cabin through the connecting hole; the pressure cover and the base plate are magnetically attracted to each other.

[0011] Preferably, when the comparison module determines that the signal data transmitted twice are the same, the count value of the counting module increases. A signal adjustment threshold is preset in the counting module. When the count value of the counting module reaches the set value, the signal adjustment module works, and when the counting is interrupted, the counting module counts again.

[0012] A signal control method for an organic light emitting display module comprises the following steps: S1, the main control chip transmits display data and control signals to the signal processing module, and the signal processing module uses the receiving module to receive the signal transmitted by the main control chip; S2, the receiving module transmits the signal to the conversion module, and the conversion module processes the received signal to generate a driving signal adapted to the light-emitting module; S3, the comparison module compares two adjacent driving signals. If the two adjacent driving signals are different, the comparison module uploads them to the light-emitting module through the transmission module, and the light-emitting module adjusts the luminous intensity and color of the pixel according to the driving signal to display the image; if the two adjacent driving signals are the same, the counting module counts, and the comparison module uploads them to the light-emitting module through the transmission module, and the light-emitting module adjusts the luminous intensity and color of the pixel according to the driving signal to display the image; S4, when the counting module reaches the counting threshold, the comparison module uploads the driving signal to the signal adjustment module, the signal adjustment module adjusts the driving signal by a pixel displacement method to generate a new driving signal, the signal adjustment module uploads the new driving signal to the light-emitting module through the transmission module, and the light-emitting module adjusts the luminous intensity and color of the pixel according to the driving signal to realize the display of the image; S5. The heat generated by the light-emitting module when it is working is transferred to the heat dissipation cabin through the first heat transfer frame, the second heat transfer frame and the heat dissipation fins. The micro temperature sensor detects the temperature in the heat dissipation cabin and uploads the detection result to the main control chip. The main control chip controls the operation of the heat dissipation fan according to the detection result and adjusts the brightness of the light-emitting module according to demand. Compared with the prior art, the present invention has the following beneficial effects: 1. The organic light-emitting display module and signal control method use a protective component to cool the module body, accelerate the heat dissipation speed of the module body, facilitate the use of the module body, and can press the module body to improve the reliability of the connection between the layers in the module body and avoid peeling. A stepped sealing surface is formed between the protective component and the module body to improve the protective effect of the protective component, effectively block the external water vapor and oxygen from corroding the module body, and use an adsorption block to adsorb the residual water vapor and oxygen on the module body to avoid the residual water vapor and oxygen on the module body from corroding the module body.

[0013] 2. The organic light-emitting display module and signal control method can prevent the organic light-emitting display module from being burned in due to long-term display of static images by regularly adjusting the driving signal and changing the working pixel points, thereby increasing the service life of the organic light-emitting display module; the heat dissipation of the light-emitting module can be determined by a micro temperature sensor, and the operating frequency of the cooling fan and the brightness of the light-emitting module can be controlled according to demand to avoid excessive temperature affecting the use of the light-emitting module. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of an organic light emitting display module proposed by the present invention; Figure 2 This is a front view of the light emitting module structure; Figure 3 It is a schematic diagram of the back side of the light emitting module structure; Figure 4 It is a schematic diagram of the cross-section of the light emitting module structure; Figure 5 for Figure 4 Schematic diagram of the first heat transfer frame; Figure 6 Keep the signal processing module away from the block diagram; Figure 7 This is a flow chart of a signal control method for an organic light emitting display module proposed by the present invention.

[0015] In the figure: 1. substrate; 2. anode plate; 3. hole injection layer; 4. hole transport layer; 5. light-emitting layer; 6. electron transport layer; 7. cathode plate; 8. bottom plate; 9. heat dissipation cabin; 10. heat dissipation fins; 11. micro temperature sensor; 12. second heat transfer frame; 13. first heat transfer frame; 14. elastic pad 2; 15. elastic pad 1; 16. pressure cover; 17. air inlet; 18. cooling fan; 19. adsorption block. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] The present invention provides an embodiment: please refer to Figures 1 to 6An organic light-emitting display module includes a main control chip, a signal processing module and a light-emitting module. The main control chip is connected to the signal processing module. The main control chip transmits display data and control signals to the signal processing module. The signal processing module is connected to the light-emitting module. The signal processing module receives and converts the signal transmitted by the main control chip, generates a driving signal and transmits it to the light-emitting module. The light-emitting module correctly displays the image according to the driving signal.

[0018] The signal processing module includes a receiving module, a conversion module, a comparison module, a counting module, a signal adjustment module and a transmission module. The receiving module is used to receive the display data and control signal transmitted by the main control chip, and transmit the received signal to the conversion module. The conversion module processes the received signal, generates a driving signal adapted to the light-emitting module, and uploads the driving signal to the comparison module; the comparison module compares two adjacent driving signals. If the current driving signal is different from the previous adjacent driving signal, the comparison module uploads the driving signal to the transmission module, and the transmission module uploads the driving signal to the light-emitting module. If the current driving signal is different from the previous adjacent driving signal, the comparison module uploads the driving signal to the transmission module. The transmission module uploads the driving signal to the light-emitting module. The signals are the same, the counting module works, the counting value of the counting module increases, and the counting module is preset with a signal adjustment threshold. If the counting value does not reach the set value, the comparison module directly uploads the driving signal to the transmission module. If the counting value increases by the set value, the comparison module uploads the driving signal to the signal adjustment module. The signal adjustment module works, and the signal adjustment module adjusts the driving signal. When the display screen of the light-emitting module remains unchanged, the working pixel of the light-emitting module is changed. The signal adjustment module can adjust the driving signal by the pixel displacement method to generate a new driving signal. The signal adjustment module uploads the new driving signal to the light-emitting module through the transmission module. And during the operation of the counting module, if the counting is interrupted, the original counting of the counting module is cleared and the counting starts again.

[0019] From the above description, it can be seen that during use, the present application can prevent the organic light-emitting display module from burning in due to long-term display of static images by regularly adjusting the driving signal and changing the working pixel point, thereby improving the service life of the organic light-emitting display module.

[0020] The light-emitting module includes a module body and a protective component that wraps the module body; the protective component includes a bottom plate 8 connected to the bottom of the module body, a pressure cover 16 connected to the top of the module body, and a cooling frame located between the bottom plate 8 and the pressure cover 16. The module body is located in the inner cavity of the cooling frame. The cooling frame includes a first heat transfer frame 13, a second heat transfer frame 12 and a heat dissipation cabin 9 from the outside to the inside. The top of the first heat transfer frame 13 and the outer circle of the top of the module body are connected to the pressure cover 16. The pressure cover 16 and the bottom plate 8 are in a state of magnetic attraction. The bottom of the first heat transfer frame 13 is connected to the bottom end of the module body through an elastic pad 15. The material of the elastic pad 15 can be a thermal conductive rubber pad. Through the setting of the elastic pad 15, the magnetic attraction force between the pressure cover 16 and the bottom plate 8 enables the pressure cover 16 to press the module body to ensure the reliability of the connection between the layers of the module body and avoid peeling. The outer surface of the gland 16 is wrapped with an insulating film to prevent the electrons on the module body from being transferred to the gland 16. The gland 16 can be made of metal iron, and a magnet block can be provided on the bottom plate 8. The first heat transfer frame 13 is separated from the module body by an ultra-thin high thermal conductivity adhesive film (thermal conductivity reaches 1.3-1.5W / mK). The inner wall of the first heat transfer frame 13 is evenly inlaid with adsorption blocks 19, which are in direct contact with the module body. The adsorption blocks 19 can be made of attapulgite and zeolite particles.

[0021] The second heat transfer frame 12 is connected to the bottom end of the module body. The second heat transfer frame 12 and the heat dissipation chamber 9 are connected to the bottom of the pressure cover 16 through the elastic pad 14. The material of the elastic pad 14 can be a thermal conductive rubber pad. The heat dissipation chamber 9 is connected to the outer ring on the top of the bottom plate 8. Through the setting of the second heat transfer frame 12, the second heat transfer frame 12 can transfer the heat accumulated on the first heat transfer frame 13 to the heat dissipation chamber 9. The heat dissipation chamber 9 is a hollow structure. A micro temperature sensor 11 is arranged in the heat dissipation chamber 9. The model of the micro temperature sensor 11 is not limited here. A cooling fan 18 is arranged on one side of the bottom plate 8, an air inlet 17 is arranged on the side of the heat dissipation cabin 9 away from the cooling fan 18, and a connecting hole is arranged at the bottom of the inner cavity of the heat dissipation cabin 9 away from the air inlet 17. The inner cavity of the bottom plate 8 is connected with the inner cavity of the heat dissipation cabin 9 through the connecting hole, and the connecting hole can be a rectangular hole arranged along the width direction of the bottom plate 8; through the arrangement of the heat dissipation cabin 9, when the cooling fan 18 is working, the outside air can enter the heat dissipation cabin 9 through the air inlet 17, and the air in the heat dissipation cabin 9 enters the inner cavity of the bottom plate 8 through the connecting hole, and is discharged through the cooling fan 18. During the flow of air, the heat in the heat dissipation cabin 9 is taken away, so as to cool down the module body. In addition, the micro temperature sensor 11 detects the temperature in the heat dissipation cabin 9 in real time, and uploads the detection result to the main control chip. The active chip controls the working frequency of the cooling fan 18 according to the detection result of the micro temperature sensor 11, and adjusts the brightness of the light-emitting module according to the demand.

[0022] Heat dissipation fins 10 are evenly arranged on one side of the inner cavity of the heat dissipation chamber 9 close to the second heat transfer frame 12. The heat dissipation fins 10 are used to increase the exchange area between air and heat and improve the cooling speed.

[0023] The first heat transfer frame 13 and the second heat transfer frame 12, the second heat transfer frame 12 and the heat dissipation chamber 9, and the second heat transfer frame 12 and the module body can be connected by ultra-thin high thermal conductivity adhesive films. The first heat transfer frame 13, the second heat transfer frame 12 and the heat dissipation chamber 9 can be made of graphene.

[0024] From the above description, it can be seen that when the present application is in use, the protective component is used to cool down the module body, thereby accelerating the heat dissipation speed of the module body, facilitating the use of the module body, and being able to press the module body to improve the reliability of the connection between the layers in the module body and avoid peeling. A stepped sealing surface is formed between the protective component and the module body to improve the protective effect of the protective component, effectively blocking external water vapor and oxygen from corroding the module body, and utilizing the adsorption block 19 to adsorb residual water vapor and oxygen on the module body to avoid corrosion of the module body by residual water vapor and oxygen on the module body.

[0025] The module body mentioned above is the prior art, and the module body comprises a substrate 1 on which an anode plate 2, a hole injection layer 3, a hole transport layer 4, a light emitting layer 5, an electron transport layer 6 and a cathode plate 7 are sequentially arranged.

[0026] The outer ring of the top of the cathode plate 7 is connected to the bottom of the pressure cover 16 , the first heat transfer frame 13 is connected to the top of the substrate 1 through the elastic pad 15 , and the bottom of the second heat transfer frame 12 is connected to the top of the substrate 1 .

[0027] The present invention provides a signal control method for an organic light emitting display module, comprising the following steps: S1, the main control chip transmits display data and control signals to the signal processing module, and the signal processing module uses the receiving module to receive the signal transmitted by the main control chip; S2, the receiving module transmits the signal to the conversion module, and the conversion module processes the received signal to generate a driving signal adapted to the light-emitting module; S3, the comparison module compares two adjacent driving signals. If the two adjacent driving signals are different, the comparison module uploads them to the light-emitting module through the transmission module, and the light-emitting module adjusts the luminous intensity and color of the pixel according to the driving signal to display the image; if the two adjacent driving signals are the same, the counting module counts, and the comparison module uploads them to the light-emitting module through the transmission module, and the light-emitting module adjusts the luminous intensity and color of the pixel according to the driving signal to display the image; S4, when the counting module reaches the counting threshold, the comparison module uploads the driving signal to the signal adjustment module, the signal adjustment module adjusts the driving signal by a pixel displacement method to generate a new driving signal, the signal adjustment module uploads the new driving signal to the light-emitting module through the transmission module, and the light-emitting module adjusts the luminous intensity and color of the pixel according to the driving signal to realize the display of the image; S5. The heat generated by the light-emitting module when it is working is transferred to the heat dissipation cabin 9 through the first heat transfer frame 13, the second heat transfer frame 12 and the heat dissipation fins 10. The micro temperature sensor 11 detects the temperature in the heat dissipation cabin 9 and uploads the detection result to the main control chip. The main control chip controls the operation of the heat dissipation fan 18 according to the detection result and adjusts the brightness of the light-emitting module according to demand.

[0028] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. Although the embodiments of the present invention have been shown and described, it is understood by ordinary technicians in the field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. An organic light-emitting display module, comprising a main control chip, a signal processing module and a light-emitting module, characterized in that: The main control chip is connected to the signal processing module, and the main control chip transmits display data and control signals to the signal processing module. The signal processing module is connected to the light-emitting module, and the signal processing module receives and converts the signal transmitted by the main control chip, generates a driving signal and transmits it to the light-emitting module, so that the light-emitting module correctly displays the image; the signal processing module includes a comparison module, a counting module, a signal adjustment module and a conveying module, and the comparison module is connected to the counting module, the signal adjustment module and the conveying module, and the signal adjustment module is connected to the conveying module; The light-emitting module comprises a module body and a protective component that wraps the module body; the protective component comprises a bottom plate (8) connected to the bottom of the module body, a pressure cover (16) connected to the top of the module body, and a cooling frame connecting the bottom plate (8) and the pressure cover (16); the module body is located in the inner cavity of the cooling frame; the cooling frame comprises, from the inside to the outside, a first heat transfer frame (13), a second heat transfer frame (12), and a heat dissipation cabin (9); the top of the first heat transfer frame (13) and the outer ring of the top of the module body are both connected to the pressure cover (16). The bottom of the first heat transfer frame (13) is connected to the bottom end of the module body via a first elastic pad (15); the inner wall of the first heat transfer frame (13) is evenly inlaid with adsorption blocks (19); the second heat transfer frame (12) is connected to the bottom end of the module body; the second heat transfer frame (12) and the heat dissipation chamber (9) are both connected to the bottom of the pressure cover (16) via a second elastic pad (14); the heat dissipation chamber (9) is connected to the outer ring at the top of the base plate (8); and the inner cavity of the heat dissipation chamber (9) is connected to the inner cavity of the base plate (8).

2. The organic light emitting display module according to claim 1, characterized in that: The signal processing module also includes a receiving module and a conversion module. The receiving module is connected to the main control chip, and the receiving module and the conversion module are connected to the comparison module.

3. The organic light emitting display module according to claim 1, characterized in that: The module body comprises a substrate (1), on which an anode plate (2), a hole injection layer (3), a hole transport layer (4), a light-emitting layer (5), an electron transport layer (6) and a cathode plate (7) are sequentially arranged.

4. The organic light emitting display module according to claim 3, characterized in that: The outer ring at the top of the cathode plate (7) is connected to the bottom of the pressure cover (16), the first heat transfer frame (13) is connected to the top of the substrate (1) via an elastic pad (15), and the bottom of the second heat transfer frame (12) is connected to the top of the substrate (1).

5. The organic light emitting display module according to claim 1, characterized in that: The heat dissipation chamber (9) is a hollow structure, heat dissipation fins (10) are evenly arranged on one side of the inner cavity of the heat dissipation chamber (9) close to the second heat transfer frame (12), and a micro temperature sensor (11) is arranged in the heat dissipation chamber (9).

6. The organic light emitting display module according to claim 5, characterized in that: A cooling fan (18) is provided on one side of the bottom plate (8), an air inlet (17) is provided on the side of the heat dissipation chamber (9) away from the cooling fan (18), a connecting hole is provided at the bottom of the inner cavity of the heat dissipation chamber (9) away from the air inlet (17), and the inner cavity of the bottom plate (8) is connected to the inner cavity of the heat dissipation chamber (9) through the connecting hole; the pressure cover (16) and the bottom plate (8) are magnetically attracted to each other.

7. The organic light emitting display module according to claim 2, characterized in that: When the comparison module determines that the data of two adjacent transmission signals are the same, the counting module counts an increase. The counting module is preset with a signal adjustment threshold. When the counting value of the counting module reaches the set value, the signal adjustment module works, and when the counting is interrupted, the counting module restarts the counting.

8. A signal control method for an organic light emitting display module according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, the main control chip transmits display data and control signals to the signal processing module, and the signal processing module uses the receiving module to receive the signal transmitted by the main control chip; S2, the receiving module transmits the signal to the conversion module, and the conversion module processes the received signal to generate a driving signal adapted to the light-emitting module; S3, the comparison module compares two adjacent driving signals. If the two adjacent driving signals are different, the comparison module uploads them to the light-emitting module through the transmission module, and the light-emitting module adjusts the luminous intensity and color of the pixel according to the driving signal to display the image; if the two adjacent driving signals are the same, the counting module counts, and the comparison module uploads them to the light-emitting module through the transmission module, and the light-emitting module adjusts the luminous intensity and color of the pixel according to the driving signal to display the image; S4, when the counting module reaches the counting threshold, the comparison module uploads the driving signal to the signal adjustment module, the signal adjustment module adjusts the driving signal by a pixel displacement method to generate a new driving signal, the signal adjustment module uploads the new driving signal to the light-emitting module through the transmission module, and the light-emitting module adjusts the luminous intensity and color of the pixel according to the driving signal to realize the display of the image; S5. The heat generated by the light-emitting module when it is working is transferred to the heat dissipation chamber (9) through the first heat transfer frame (13), the second heat transfer frame (12) and the heat dissipation fins (10). The micro temperature sensor (11) detects the temperature in the heat dissipation chamber (9) and uploads the detection result to the main control chip. The main control chip controls the operation of the heat dissipation fan (18) according to the detection result and adjusts the brightness of the light-emitting module according to demand.

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