Display device and display control method

Abstract

The present application provides a display device and a display control method. The display device includes a first display unit, a second display unit, a first drive circuit and a second drive circuit; the first drive circuit is coupled to the first display unit, and the second drive circuit is coupled to the second display unit; the first display unit includes a plurality of first light-emitting units, and the second display unit includes a plurality of second light-emitting units; wherein the first drive circuit is configured to: light up the plurality of first light-emitting units in a row-column drive mode; the second drive circuit is configured to: light up the plurality of second light-emitting units in a global drive mode. The display control method includes using the first drive circuit to light up the plurality of first light-emitting units of the first display unit in a row-column drive mode; and using the second drive circuit to light up the plurality of second light-emitting units of the second display unit in a global drive mode.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display device and a display control method. Background Art

[0002] Light Emitting Diode (LED) is a solid-state semiconductor device that can convert electrical energy into visible light. In the prior art, the control system of LED is mostly a single display control mode, which has the problems of high power consumption, poor display effect and high cost. Summary of the invention

[0003] In view of this, the purpose of the present application is to provide a display device and a display control method to solve or partially solve the above problems.

[0004] In a first aspect of the present application, a display device is provided, comprising:

[0005] A first display unit, a second display unit, a first driving circuit and a second driving circuit; the first driving circuit is coupled to the first display unit, and the second driving circuit is coupled to the second display unit; the first display unit includes a plurality of first light-emitting units, and the second display unit includes a plurality of second light-emitting units; wherein,

[0006] The first driving circuit is configured to: light up the plurality of first light-emitting units in a row-column driving manner;

[0007] The second driving circuit is configured to light up the plurality of second light-emitting units in a global driving manner.

[0008] In a second aspect of the present application, a display control method using the display device according to the first aspect is provided, the method comprising:

[0009] Lighting up a plurality of first light-emitting units of the first display unit by using a first driving circuit in a row-column driving manner;

[0010] The second driving circuit is used to light up the plurality of second light-emitting units of the second display unit in a global driving manner.

[0011] It can be seen from the above that the display device and display control method provided in the present application solve the problems of high power consumption, poor display effect and high cost caused by a single display control system by adopting at least two display control methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 A schematic diagram of a display control system of a display device is shown.

[0014] Figure 2 A schematic diagram of a display device is shown.

[0015] Figure 3A A partial cross-sectional view of a display device is shown.

[0016] Figure 3B A partial cross-sectional view of another display device is shown. DETAILED DESCRIPTION

[0017] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0018] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] The embodiment of the present application provides a display device. The display device is a product with an image display function, such as a display, a television, a billboard, a digital photo frame, a laser printer with a display function, a telephone, a mobile phone, a personal digital assistant (PDA), a digital camera, a portable camcorder, a viewfinder, a navigator, a vehicle, a large-area wall, a home appliance, an information query device (such as business query devices and monitors of departments such as e-government, banks, hospitals, and electricity, etc.).

[0020] In some embodiments, the display device may further include a display unit and a driving circuit coupled to the display unit, the driving circuit being configured to provide a corresponding electrical signal to the display unit. The display device may further include a control circuit, the control circuit being configured to transmit the acquired image information to the driving circuit.

[0021] Combination Figure 1 , Figure 2 and Figure 3A It can be seen that the display device 100 may include a first display unit 101, a second display unit 102, a first driving circuit 13, and a second driving circuit 14. The first display unit 101 may further include a plurality of first light-emitting units 1011, and the second display unit 102 may further include a plurality of second light-emitting units 1023. The first driving circuit 13 is coupled to the first display unit 101, and the second driving circuit 14 is coupled to the second display unit 102.

[0022] In some embodiments, Figure 2 and Figure 3A As shown, the second display unit 102 may further include a shading plate 1021, a light guide plate 1022 and a structural member 1024. A plurality of second light-emitting units 1023 are arranged on the structural member 1024, and are arranged on at least one side of the light guide plate 1022. The light guide plate 1022 is arranged between the shading plate 1021 and the structural member 1024, and is arranged on the side of the light emitting direction of the second light-emitting unit 1023. The shading plate 1021 is arranged on the side of the light emitting direction of the light guide plate 1022. The light guide plate 1022 is used to guide the light emitted by the second light-emitting unit 1023 to the light emitting side of the second display unit 102. The shading plate 1021 is provided with a hollow structure 1026 ( Figure 2 The hollow structure 1026 is used to transmit the light emitted from the light guide plate 1022. In this way, the hollow structure 1026 is used to design a pattern to be displayed. After the second display unit 102 is lit, light can be emitted from the hollow structure 1026 formed into a corresponding pattern, visually forming an effect of displaying a pattern.

[0023] As an optional embodiment, Figure 3B As shown, the second display unit 102 may further include a shading plate 1021, a plurality of second light emitting units 1023 and a light board 1025. The plurality of second light emitting units 1023 are evenly arranged on the light board 1025, and the shading plate 1021 is arranged on one side of the light emitting direction of the plurality of second light emitting units 1023 and is parallel to the light board 1025. The shading plate 1021 is provided with a hollow structure, and the hollow structure 1026 is used to transmit the light emitted from the plurality of second light emitting units 1023.

[0024] It is understandable that the light guide plate 1022 has the characteristics of extremely high refractive index and no light absorption. It can convert the line light source emitted by the second light-emitting unit 1023 into a surface light source in the light-emitting direction of the second display unit 102, so that the surface light source can be uniformly emitted to the shading plate 1021. Therefore, in order to ensure that the light of the shading plate 1021 is uniformly emitted as a whole, the number and position of the second light-emitting units 1023 can be set according to the shape of the second display unit 102, that is, the second light-emitting units 1023 can be arranged around the light guide plate 1022. Under the structure of using the light guide plate 1022, the number of second light-emitting units 1023 used in the second display unit 102 is small, which reduces the production cost. In addition, the internal components occupy less space and the overall weight is also lighter.

[0025] In some embodiments, Figure 2 As shown, a plurality of first light-emitting units 1011 are arranged in an array on the first display unit 101. The first driving circuit 13 may be a dynamic control circuit, which uses a row-column driving method to light up the plurality of first light-emitting units 1011. This control method can increase the number of controlled pixel points exponentially and save the number and cost of control chips, but the power consumption is relatively high. The second driving circuit 14 may be a backlight control circuit, which uses a global driving method to light up the plurality of second light-emitting units 1023. This control method has low power consumption and generates less heat.

[0026] It is understandable that the row-column driving method adopted by the first driving circuit 13 realizes a scanning control effect, which can be used for display units with wider sizes. Although a display unit with wider sizes can also use a single-point control method, it will occupy more hardware resources for image calculation and processing. The scanning control method can reduce the number of chips used and reduce the cost of the system while achieving a single-point controllable effect, but the board wiring is complicated, so it can be used for display units with wider sizes. The second display unit 102 can be used for a display unit with a fixed display effect, that is, the hollow structure 1026 of the shading plate 1021 is used to design a display effect that needs to be fixed, and a light-transmitting display is performed through a shading plate 1021 arranged on the light guide plate 1022, or a shading plate 1021 on one side of the light emitting direction of the second light-emitting unit 1023.

[0027] Combination Figure 1 and Figure 2 It can be seen that the display device 100 may further include a third display unit 103 and a third driving circuit 15, and the third driving circuit 15 is coupled to the third display unit 103. The third display unit 103 may further include a plurality of third light emitting units 1031.

[0028] In some embodiments, Figure 2As shown, the third display unit 103 may be in a ring shape, or the third display unit 103 may further include sub-display units extending in at least two directions. The plurality of third light emitting units 1031 are arranged according to the shape of the third display unit 103 .

[0029] In some embodiments, Figure 2 As shown, compared with the first display unit 101, the third display unit 103 is a linear display unit with a narrower size. Due to the narrow width or more specific shape of this display unit, the third light-emitting units 1031 cannot form a relatively regular array arrangement therein, making it difficult to implement a scanning drive method. Therefore, the third drive circuit 15 coupled to the third display unit 103 is a static control circuit, which uses a single-point drive method to light up multiple third light-emitting units 1031. This control method can achieve single-point controllability and has lower power consumption, but compared with the first display unit 101, the number of LED chips used is larger.

[0030] like Figure 1 As shown, the display device 100 may further include a main control circuit 10, a first sub-control circuit 11, and a second sub-control circuit 12. The first sub-control circuit 11 and the second sub-control circuit 12 are coupled to the main control circuit 10, respectively, the first sub-control circuit 11 is coupled to the first drive circuit 13 and the third drive circuit 15, respectively, and the second sub-control circuit 12 is coupled to the second drive circuit 14.

[0031] In some embodiments, the main control circuit 10 is configured to obtain display information of the display device 100, determine the brightness information of the display device 100 based on the display information, and transmit multiple first gray scales and multiple third gray scales corresponding to the brightness information to the first sub-control circuit 11; and transmit the second gray scale corresponding to the average value of the brightness information to the second sub-control circuit 12.

[0032] In some embodiments, the first sub-control circuit 11 is configured to convert the above-mentioned multiple first gray scales into multiple first current information corresponding to multiple first light-emitting units 1011, convert the above-mentioned multiple third gray scales into multiple third current information corresponding to multiple third light-emitting units 1031, and transmit the multiple first current information and the multiple third current information to the first driving circuit 13 and the third driving circuit 15, respectively.

[0033] In some embodiments, the second sub-control circuit 12 is configured to convert the second gray scale into second current information of the second light-emitting unit 1023 , and transmit the second current information to the second driving circuit 14 .

[0034] Specifically, the main control circuit 10 determines the brightness information of the display device 100 according to the following formula:

[0035]

[0036] Among them, Y represents the brightness information of the display device 100, UV represents the color information of the display device 100, RGB represents the pixel information of three colors, and the 3×3 matrix value is the conversion matrix coefficient of converting from RGB to YUV.

[0037] In the main control circuit 10, the pixel information (RGB values) of the image, that is, the display information of the display device 100, is firstly acquired, and then the pixel information is converted into YUV values.

[0038] The first display unit 101 implements a scanning control effect. Assuming that the first driving circuit 13 has k circuits, the first display unit 101 is controlled by k-row scanning, that is, at most 1 / k rows of the first light-emitting units 1011 are lit per unit time. Assuming that the dot spacing of the first light-emitting unit 1011 is n', the brightness coefficient is l, and the first current information is I' i , when the display state is the case of the first display unit 101, the first grayscale of the i-th first light-emitting unit in the corresponding first display unit is: d′ i =l×I′ i ×k×n′ 2 .

[0039] The second display unit 102 implements backlight display, and the second light emitting unit 1023 transmits light and displays through a mask, that is, transmits light and displays through the shading plate 1021. Assuming that the light transmittance of the shading plate 1021 is m, the second current information is I", the dot spacing of the second light emitting unit is n", and the brightness coefficient is l, when the display state is the second display unit 102, the corresponding second grayscale is: d"=l×I"×n" 2 ×m.

[0040] The third display unit 103 realizes a single-point control effect. Assume that the third current information is I″′ i , the dot pitch of the third light-emitting unit is n″′, the brightness coefficient is l, and when the display state is the case of the third display unit 103, the third grayscale of the i-th third light-emitting unit in the corresponding third display unit is: d″′ i =l×I″′ i ×n″′ 2 .

[0041] The main control circuit 10 extracts the brightness information Y of the display device 100 and transmits Y to the sub-control circuit, which may include a first sub-control circuit 11 and a second sub-control circuit 12. The first sub-control circuit converts the brightness information Y into current information set for the first light-emitting unit 1011 and the third light-emitting unit 1031. Since the first light-emitting unit 1011 and the third light-emitting unit 1031 are partially single-point controllable, that is, the brightness value of each first light-emitting unit 1011 and each third light-emitting unit 1031 is related to the grayscale brightness of the pixel point, the setting of the current information of each first light-emitting unit 1011 and each third light-emitting unit 1031 is based on the grayscale brightness value at the corresponding position of the image. In other words, since the part controlled by the first sub-control circuit 11 is single-point controllable, each light-emitting unit of the part represents the brightness information of a certain area, and the brightness information of the certain area depends on the point spacing density and number of the light-emitting units.

[0042] According to the above grayscale formula, conversion formulas for the first current information corresponding to the first light-emitting unit 1011 and the third current information corresponding to the third light-emitting unit 1031 can be obtained respectively:

[0043] First current information:

[0044] Third current information:

[0045] The second sub-control circuit 12 implements a global dimming mode, that is, the corresponding second light-emitting unit 1023 is an overall brightness adjustment. Since the brightness of each pixel of the image is different, but the brightness of the second light-emitting unit 1023 needs to be controlled as a whole, therefore, assuming that the number of the second light-emitting units 1023 is α, it is necessary to take the average value of the brightness information as the calculated value of the second current information of the second light-emitting unit 1023:

[0046]

[0047] Y″ is the average value of the brightness information corresponding to the second light-emitting unit 1023. The second grayscale corresponding to the average value of the brightness information is transmitted to the second auxiliary control circuit 12, thereby obtaining the second current information according to the above formula:

[0048] Second current information:

[0049] The first driving circuit 13 , the second driving circuit 14 and the third driving circuit 15 light up the first light emitting unit 1011 , the second light emitting unit 1023 and the third light emitting unit 1031 according to the first current information, the second current information and the third current information respectively.

[0050] It should be noted that although the display device 100 achieves different display effects, the overall input is brightness information converted from pixel information of the same image. The control methods of different display units of the display device 100 cooperate with each other to achieve the display effect of an image. For example, Figure 2 As shown. It is understandable that Figure 2 The shape and structure of the display device shown are only schematic, and other similar designs also fall within the protection scope of this application.

[0051] The embodiments of the present application can be applied in scenarios such as performance props for large-scale events. Different light-emitting unit control methods are adopted according to the characteristics of different areas of the display device. Compared with a single control method, the embodiments of the present application help to improve the display effect, optimize the algorithm space, and reduce chip costs. Among them, through the row and column control method such as the first display unit 101, the number of control chips can be saved to a certain extent. Through the single-point control method such as the second display unit 102, a narrower display unit can be designed to improve the display effect and reduce power consumption. By displaying a fixed display effect through the global dimming method such as the third display unit 103, the cost of hardware materials can be reduced.

[0052] The present application also provides a method for performing display control using a corresponding display device in any of the above embodiments, the method comprising:

[0053] Lighting up a plurality of first light-emitting units of the first display unit by using a first driving circuit in a row-column driving manner;

[0054] The second driving circuit is used to light up the plurality of second light-emitting units of the second display unit in a global driving manner.

[0055] In some embodiments, the display device further includes a third display unit and a third driving circuit, the third driving circuit is coupled to the third display unit, and the third display unit includes a plurality of third light-emitting units; the method further includes:

[0056] The third driving circuit is used to light up a plurality of third light-emitting units in a single-point driving manner.

[0057] In some embodiments, the display device further includes a main control circuit, a first sub-control circuit and a second sub-control circuit, the first sub-control circuit and the second sub-control circuit are respectively coupled to the main control circuit; the first sub-control circuit is respectively coupled to the first driving circuit and the third driving circuit, and the second sub-control circuit is coupled to the second driving circuit; the method further includes:

[0058] The main control circuit is used to obtain display information of the display device, and the brightness information of the display device is determined according to the display information, and a plurality of first grayscales and a plurality of third grayscales corresponding to the brightness information are transmitted to the first sub-control circuit; and a second grayscale corresponding to the average value of the brightness information is transmitted to the second sub-control circuit;

[0059] Using the first sub-control circuit, the plurality of first grayscales are converted into a plurality of first current information corresponding to the plurality of first light-emitting units, the plurality of third grayscales are converted into a plurality of third current information corresponding to the plurality of third light-emitting units, and the plurality of first current information and the plurality of third current information are transmitted to the first driving circuit and the third driving circuit respectively;

[0060] The second gray scale is converted into second current information of the second light emitting unit by using the second auxiliary control circuit, and the second current information is transmitted to the second driving circuit.

[0061] The method of the above embodiment is used to control the corresponding display device in any of the above embodiments, and has the beneficial effects of the corresponding display device embodiment, which will not be described in detail here.

[0062] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0063] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present application difficult to understand, the known power supply / ground connection with the integrated circuit (IC) chip and other components may or may not be shown in the provided drawings. In addition, the device can be shown in the form of a block diagram to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform to be implemented in the embodiments of the present application (that is, these details should be fully within the scope of understanding of those skilled in the art). In the case of elaborating specific details (e.g., circuits) to describe exemplary embodiments of the present application, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.

[0064] Although the present application has been described in conjunction with specific embodiments of the present application, many replacements, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.

[0065] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A display device, comprising a first display unit, a second display unit, a third display unit, a first drive circuit, a second drive circuit and a third drive circuit; the first drive circuit is coupled to the first display unit, the second drive circuit is coupled to the second display unit, and the third drive circuit is coupled to the third display unit; the first display unit comprises a plurality of first light-emitting units, the second display unit comprises a plurality of second light-emitting units, and the third display unit comprises a plurality of third light-emitting units; wherein, The first driving circuit is configured to: light up the plurality of first light-emitting units in a row-column driving manner; The second driving circuit is configured to: light up the plurality of second light-emitting units in a global driving manner; The third driving circuit is configured to: light up the plurality of third light-emitting units in a single-point driving manner; The first display unit is a rectangular display unit, the second display unit is a display unit with a fixed display effect, and compared with the first display unit, the third display unit is a linear display unit with a narrower size.

2. The display device according to claim 1, wherein: The plurality of first light emitting units are arrayed on the first display unit.

3. The display device according to claim 1, wherein: The second display unit further includes a light guide plate and a light shielding plate, wherein the light shielding plate is arranged on one side of the light emitting direction of the light guide plate, and the light shielding plate is provided with a hollow structure; wherein, The plurality of second light emitting units are disposed on at least one side of the light guide plate, the light guide plate is configured to guide the light emitted by the second light emitting units to the light emitting side of the second display unit, and the hollow structure is used to transmit the light emitted from the light guide plate.

4. The display device according to claim 1, wherein: The third display unit includes sub-display units extending in at least two directions, or the third display unit is in a ring shape; The plurality of third light emitting units are arranged according to the shape of the third display unit.

5. The display device according to claim 1, wherein: The display device further includes a main control circuit, a first sub-control circuit and a second sub-control circuit, wherein the first sub-control circuit and the second sub-control circuit are respectively coupled to the main control circuit; wherein, The main control circuit is configured to: obtain display information of the display device, determine brightness information of the display device according to the display information, and transmit a plurality of first grayscales and a plurality of third grayscales corresponding to the brightness information to the first sub-control circuit; and transmit a second grayscale corresponding to an average value of the brightness information to the second sub-control circuit; The first sub-control circuit is coupled to the first driving circuit and the third driving circuit respectively, and is configured to: convert the plurality of first grayscales into a plurality of first current information corresponding to the plurality of first light-emitting units, convert the plurality of third grayscales into a plurality of third current information corresponding to the plurality of third light-emitting units, and transmit the plurality of first current information and the plurality of third current information to the first driving circuit and the third driving circuit respectively; The second sub-control circuit is coupled to the second driving circuit and is configured to: convert the second gray scale into second current information of the second light-emitting unit, and transmit the second current information to the second driving circuit.

6. The display device according to claim 5, wherein: The first current information is: in, is the first gray scale of the i-th first light emitting unit in the first display unit, l is the brightness coefficient, is the first current information, k represents the number of rows of the first driving circuit, is the dot pitch of the first light-emitting unit.

7. The display device according to claim 5, wherein: The third current information is: in, is the third gray scale of the i-th third light emitting unit in the third display unit, l is the brightness coefficient, is the third current information, is the dot pitch of the third light emitting unit.

8. The display device according to claim 5, wherein: The second current information is: in, is the second grayscale, l is the brightness coefficient, is the second current information, is the dot spacing of the second light-emitting unit, m is the light transmittance of the second display unit.

9. A method for display control using the display device according to any one of claims 1 to 8, comprising: Lighting up a plurality of first light-emitting units of the first display unit by using a first driving circuit in a row-column driving manner; Lighting up the plurality of second light-emitting units of the second display unit in a global driving manner using a second driving circuit; Lighting up a plurality of third light-emitting units of the third display unit by using a third driving circuit in a single-point driving manner; The first display unit is a rectangular display unit, the second display unit is a display unit with a fixed display effect, and compared with the first display unit, the third display unit is a linear display unit with a narrower size.

10. The method of claim 9, wherein: The display device further includes a third display unit and a third driving circuit, the third driving circuit is coupled to the third display unit, and the third display unit includes a plurality of third light-emitting units; the method further includes: The third driving circuit is used to light up the plurality of third light-emitting units in a single-point driving manner.

11. The method of claim 10, wherein: The display device further includes a main control circuit, a first sub-control circuit and a second sub-control circuit, wherein the first sub-control circuit and the second sub-control circuit are respectively coupled to the main control circuit; the first sub-control circuit is respectively coupled to the first drive circuit and the third drive circuit, and the second sub-control circuit is coupled to the second drive circuit; The method further comprises: Using the main control circuit to obtain display information of the display device, determining brightness information of the display device according to the display information, and transmitting a plurality of first grayscales and a plurality of third grayscales corresponding to the brightness information to the first sub-control circuit; transmitting a second grayscale corresponding to an average value of the brightness information to the second sub-control circuit; Using the first sub-control circuit, the plurality of first grayscales are converted into a plurality of first current information corresponding to the plurality of first light-emitting units, the plurality of third grayscales are converted into a plurality of third current information corresponding to the plurality of third light-emitting units, and the plurality of first current information and the plurality of third current information are transmitted to the first driving circuit and the third driving circuit respectively; The second gray scale is converted into second current information of the second light emitting unit by using the second auxiliary control circuit, and the second current information is transmitted to the second driving circuit.

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