Pixel unit and display module thereof

Abstract

In order to maintain white balance proportion design of white light after light mixing, a pixel unit is provided, the pixel unit is composed of four sub-pixels of red, green, blue and green, the sub-pixels are composed of a red light assembly, a green light assembly, a blue light assembly and another green light assembly, and a control assembly is used for controlling the light mixing of the white light and the blue light. And control signals are respectively output by the control channels to correspondingly control four sub-pixels such as red, green, blue and green. Through the adjustment of the current, the brightness ratio of the three colors is still kept at the white balance ratio of 3: 6: 1, and the white balance ratio design of the mixed white light is achieved.

Description

Technical Field

[0001] The invention relates to a composition of a pixel unit, and in particular to a composition capable of improving the resolution of a display module. Background Art

[0002] Since its development, display devices have gone from black and white to multi-color images, font display to ultra-high resolution images, low brightness to high dynamic brightness adjustment, flat to foldable shapes, and even extended to transparent display devices. So far, display technology has been constantly pursuing higher technical specifications to adapt to different application fields. Among them, light-emitting diode (LED) display technology is the leader, with its unique component characteristics, it can achieve display requirements such as wide color gamut, high density, high brightness and low energy consumption.

[0003] Furthermore, as direct-display LED displays have made breakthroughs in key technologies such as luminous efficiency, mass transfer, and chip repair, mass production technology has also matured, and the requirements for display image quality have been improved.

[0004] In the display screen, the sub-pixel configuration generally used is to arrange red, green, and blue (hereinafter referred to as RGB) to mix white light to display the color information of a single pixel. However, as the sub-pixel size becomes smaller and smaller, the requirements for manufacturing process accuracy have increased the difficulty of mass production manufacturing process. In particular, a micro light emitting diode (micro light emitting diode) display panel has been developed recently. Because micro light emitting diodes are used as sub-pixels in the display panel, each sub-pixel can be driven to emit light individually. In existing high-resolution or large-size micro light emitting diode display panels, due to the difference in current supply of each control line, the display module is prone to problems of reduced luminous efficiency or wavelength shift, resulting in inconsistent imaging performance of the micro light emitting diode display panel in brightness or color. Summary of the invention

[0005] To solve the above problems, the purpose of this application is to provide a design that can achieve LED high-resolution display.

[0006] The present application discloses a pixel unit (100), comprising: four sub-pixels (11, 12, 13, 14), wherein the sub-pixels at least include a red light component (R1), two green light components (G1, G2) and a blue light component (B1); a control component (2), which outputs control signals (CR1, CG1, CB1) to the red light component, the green light component and the blue light component respectively via a control channel (3).

[0007] The present application discloses a display module (200, 300) comprising: a plurality of pixel units (100) as described above. When the pixel units have N green light components, where N=4 or 6, two of them can form a square array.

[0008] In order to make the features and advantages of the present application more clearly understood, embodiments will be given below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG. 1A is a schematic diagram of a known pixel composition;

[0010] FIG. 1B is a schematic diagram of a known control method;

[0011] FIG. 2A is a schematic diagram of another known pixel composition;

[0012] FIG. 2B to FIG. 2D are schematic diagrams of another conventional pixel unit control;

[0013] 3A to 3D are schematic diagrams of pixel unit control according to an embodiment of the present invention;

[0014] FIG4A is a schematic diagram of another pixel unit control according to an embodiment of the present invention;

[0015] FIG. 4B is a schematic diagram of a display module according to an embodiment of the present invention;

[0016] FIG5A is a schematic diagram of another pixel unit control according to an embodiment of the present invention;

[0017] FIG. 5B is a schematic diagram of a display module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In the following, reference will be made to Figures 1A to 5B The following diagrams are provided to describe exemplary embodiments of the present invention in detail so that those skilled in the art can fully understand the spirit of the present invention. The present invention is not limited to the following embodiments, but can be implemented in other forms. In this specification, there are some identical symbols, which represent components with the same or similar structures, functions, and principles, and can be inferred by those skilled in the art based on the teachings of this specification. For the sake of brevity of the specification, components with the same symbols will not be repeated.

[0019] Figure 1A to Figure 1B This is the pixel composition commonly used in display modules in the industry. Figure 1A The pixel unit (100, P) of the existing display module is composed of three sub-pixels, namely red (11), green (12), and blue (13). These sub-pixels are a red light component (R1), a green light component (G1), and a blue light component (B1). Figure 1B, further discloses a control component (2) for generating a control signal, and outputs three control signals (CR1, CG1, CB1) via a control channel (3) to correspondingly control three sub-pixels, namely red (11), green (12), and blue (13), so as to mix and produce the expected white light by emitting light simultaneously. The above-mentioned operation method is a common design operation.

[0020] Furthermore, please refer to Figure 2A In order to make the color more saturated, a green light component (G2) or green sub-pixel (14) is added, so that the pixel unit (100', P') of the display module is composed of four sub-pixels, namely red (11), green (12), blue (13) and green (14). Figure 2B , using a control component (21), two control channels (31, 31') output two sets of control signals (CR1, CG1, CB1; CR2, CG2, CB2) for correspondingly controlling four sub-pixels of red (11), green (12), blue (13) and green (14), and mixing the expected white light by emitting light simultaneously. Although the above operation is a common circuit design, at this time, the control channel (31) actually has corresponding control signals for the CR1 and CG1 pixels corresponding to the red (11) and green (12), and the control channel (31') actually has corresponding control signals for the CB2 and CG2 pixels corresponding to the blue (13) and green (14), and at this time, one control signal (CB1, CR2) of each of the two control channels (31, 31') is not used.

[0021] Furthermore, please refer to Figure 2C , using a control component (22), two control channels (32, 32') output two sets of control signals (CR1, CG1, CB1; CR2, CG2, CB2) for correspondingly controlling four sub-pixels, namely red (11), green (12), blue (13) and green (14), to mix expected white light by emitting light simultaneously. Although the above operation is also a common circuit design, at this time, the control channel (32) actually has corresponding control signals for the control signals CR1, CG1 and CB1 corresponding to the control of the red (11), green (12) and blue (13) pixels, while the control channel (32') actually has corresponding control signals for the control signal CG2 corresponding to the control of the green (14) pixel. At this time, the control channel (32') has two control signals (CR2, CB2) that are not used.

[0022] Please refer to Figure 2D, using a control component (23), four control channels (33, 33', 33", 33'") output four control signals (CR1, CG1, CB1; CR2, CG2, CB2; CR3, CG3, CB3; CR4, CG4, CB4) for correspondingly controlling four sub-pixels, namely red (11), green (12), blue (13) and green (14), to mix the expected white light by emitting light simultaneously. Although the above operation is also a common circuit design, at this time, the control channel (33) actually only controls the green (12) pixel The control signal (CG1) is used for the control channel (33'), the control channel (33") actually only has the control signal (CR2) corresponding to the control of the red (11) pixel, the control channel (33") actually only has the control signal (CB3) corresponding to the control of the blue (12) pixel, and the control channel (33") actually only has the control signal (CG4) corresponding to the control of the green (14) pixel. At this time, there are eight control signals (CR1, CB1, CG2, CB2, CB3, CG3, CR4, CB4) between the control channels (33, 33', 33"), 33")') that are not used.

[0023] In order to solve the shortcoming that the above circuit cannot fully utilize the control signal, the present application proposes a white light design that can fully utilize the control signal and maintain the white balance ratio.

[0024] Please refer to Figure 3A In order to maintain the white balance ratio design of the mixed white light, the present application proposes a specific embodiment of a pixel unit (100', P'), which is composed of four sub-pixels, namely red (11), green (12), blue (13) and green (14). These sub-pixels are composed of a red light component (R1), a green light component (G1), a blue light component (B1) and a green light component (G2), and a control component (24) is used to output control signals (CR1, CG1, CB1) and control signals (CR2, CG2, CB2) through control channels (34, 34') for correspondingly controlling the four sub-pixels, namely red (11), green (12), blue (13) and green (14).

[0025] In one embodiment of the present application, the control component (24) has the same number of control channels (34, 34') as the number of green light components (G1, G2), the control signal (CG1) emitted by the control channel (34) is connected to the green sub-pixel (12), and the control signal (CG2) emitted by the control channel (34') is connected to the green sub-pixel (14), so that the control channels are independently connected to the green light components one by one, and the control signal (CR1) emitted by the control channel (34) and the control signal (CR2) emitted by the control channel (34') are connected to the red sub-pixel (11), and the control signal (CB1) emitted by the control channel (34) and the control signal (CRB2) emitted by the control channel (34') are connected to the blue sub-pixel (13). At this time, although the ratio of the number of red, green and blue sub-pixels is 1:2:1, through the parallel connection of current, the brightness ratio of the above three colors is 6:12:2, and the brightness ratio of the three colors is still maintained at a ratio of 3:6:1 at the white balance position, so that the white light after mixing is maintained at a white balance ratio design.

[0026] The control signal of the present application can be current, voltage, circuit drive and calculation logic. The following description of the control signal adjustment will take current as an example. In order to achieve image white balance and fully use the control signal, it is necessary to increase the current sent to the red light component and the blue light component through circuit adjustment, that is, the control signal of the red light component and the blue light component must be increased to maintain the white balance ratio of the image.

[0027] In one embodiment of the present application, when a certain current is provided, the green light components (G1, G2) receive a certain current from the control signal independently, while the red light component (R1) and the blue light component (R2) receive a current brought by twice the control signal, so that the brightness ratio of the three colors of red, green and blue is 6:12:2, which is the 3:6:1 ratio of the image white balance. Therefore, this proposal proposes some implementation methods, by adjusting the current intensity of the red and blue components, the brightness of the red and blue components increases and the white balance ratio is maintained.

[0028] In another embodiment, if Figure 3BAs shown, a pixel unit (100") has three green light components (G1, G2, G3), a blue light component (B1), a red light component (R1) and a control component (25). In this case, the control component (25) has three control channels (35, 35', 35"), the same number as the green light components, and each green light component corresponds to a control channel one-to-one, that is, the control signal (CG1) emitted by the control channel (35) is connected to the corresponding green sub-pixel (12), the control signal (CG2) emitted by the control channel (35') is connected to the corresponding green sub-pixel (14), and the control signal (CG3) emitted by the control channel (35") is connected to the corresponding green sub-pixel (16). In addition, all three control channels are connected to the red light component (R1), that is, the control channel The control signal (CR1) emitted by the control channel (35), the control signal (CR2) emitted by the control channel (35') and the control signal (CR3) emitted by the control channel (35") are connected to the red sub-pixel (11), and the three control channels are all connected to the blue light component (B1), that is, the control signal (CB1) emitted by the control channel (35), the control signal (CB2) emitted by the control channel (35') and the control signal (CB3) emitted by the control channel (35") are connected to the blue sub-pixel (13). At this time, although the number ratio of the red, green and blue sub-pixels is 1:3:1, through the parallel connection of the current, the brightness ratio of the above three colors is 9:18:3, and the brightness ratio of the three colors can be maintained at a ratio of 3:6:1 at the white balance position, and the white light after mixing is still maintained as a white balance ratio design.

[0029] In another embodiment, if Figure 3CAs shown, a pixel unit (100'") has four green light (G1, G2, G3, G4), one blue light (B1), one red light (R1) components and a control component (26). At this time, the control component (26) has four control channels (36, 36', 36", 36'"), the same number as the green light components, and each green light component corresponds to a control signal one-to-one, that is, the control signal (CG1) emitted by the control channel (36) is connected to the green sub-pixel (12), the control signal (CG2) emitted by the control channel (36') is connected to the green sub-pixel (14), the control signal (CG3) emitted by the control channel (36") is connected to the green sub-pixel (16), and the control signal (CG4) emitted by the control channel (36'") is connected to the green sub-pixel (18). In addition, the red light control signals (CR1, CR2, CR3, CR4) of the four control channels are all connected to the red light component (R1), that is, the control signal (CG1) emitted by the control channel (36) is connected to the green sub-pixel (12), the control signal (CG2) emitted by the control channel (36') is connected to the green sub-pixel (14), the control signal (CG3) emitted by the control channel (36") is connected to the green sub-pixel (16), and the control signal (CG4) emitted by the control channel (36'") is connected to the green sub-pixel (18). The control signal (CR1), the control signal (CR2) issued by the control channel (36'), the control signal (CR3) issued by the control channel (36") and the control signal (CR4) issued by the control channel (36") are connected to the red sub-pixel (11), and the blue light control signals (CB1, CB2, CB3, CB4) of the four control channels are all connected to the blue light component (B1), that is, the control signal (CB1) issued by the control channel (36), the control signal (CB2) issued by the control channel (36'), the control signal (CB3) issued by the control channel (36") and the control signal (CB4) issued by the control channel (36") are connected to the blue sub-pixel (13). At this time, although the number ratio of the red, green and blue sub-pixels is 1:4:1, through the parallel connection of the current, the brightness ratio of the above three colors is 12:24:4, and the brightness ratio of the three colors is maintained at a ratio of 3:6:1 at the white balance position, and the white light after mixing is still maintained as a white balance ratio design.

[0030] In another embodiment, if Figure 3D As shown, when there are multiple pixel units (100'), and as mentioned above Figure 3AWhen the embodiment has two green light components (G1, G2), one blue light component (B1), and one red light component (R1), the control component (27) can control a plurality of pixel units (100') respectively, and each pixel unit (100') still independently has two control channels (37, 37') of the same number as the green light component, and each green light component corresponds to a control channel one-to-one, that is, the control signal (CG1) emitted by the control channel (37) is connected to the green sub-pixel (12), and the control signal (CG2) emitted by the control channel (37') is connected to the green sub-pixel (12). connected to the green sub-pixel (14); the red light control signals (CR1, CR2) of the two control channels are both connected to the red light component (R1), that is, the control signal (CR1) issued by the control channel (37) and the control signal (CR2) issued by the control channel (37') are connected to the red sub-pixel (11); the blue light control signals (CB1, CB2) of the two control channels are both connected to the blue light component (B1), that is, the control signal (CB1) issued by the control channel (37) and the control signal (CB2) issued by the control channel (37') are connected to the blue sub-pixel (13). At this time, when the control component (27) can control multiple pixel units (100') respectively, although the number ratio of the red, green, blue and other sub-pixels of each pixel unit (100') is 1:2:1, through the parallel connection of the current, the brightness ratio of the above three colors is 6:12:2, and the brightness ratio of the three colors can be maintained at a ratio of 3:6:1 at the white balance position, and the white light after mixing is still maintained as a white balance ratio design.

[0031] Furthermore, the present application discloses a display module (200, 300). When the display module (200, 300) is composed of a plurality of pixel units (100', 100"), the pixel units have N green light components (G), and when N=4 or 6, the pixel units can form a square array (S1, S2) in pairs.

[0032] Implementation example Figure 4A and 4B As shown, Figure 4B A display module (200) is disclosed. The display module is composed of more than one pixel unit (100''). When the pixel unit (100'') has four green light components (G), two pixel units (100''') can be grouped together to form a square array (S1). Figure 4B As shown, the upper and lower parts of the partition line (Z) are each a pixel unit (100"'), and the control component corresponding to the upper pixel unit (100"') can be Figure 4A The control components corresponding to the pixel units (100') above the dividing line (L) and below the dividing line (L) may be Figure 4A Below the dividing line (L), two light-emitting components can be formed into a square array, and each is independently controlled by a corresponding control component.

[0033] Implementation example Figure 5A and 5B As shown, Figure 5B A display module (300) is disclosed. The display module is composed of more than one pixel unit (100"), and when the pixel unit (100") has six green light components (G), two pixel units (100") can be grouped into a square array (S2), such as Figure 5B As shown, the upper and lower parts of the partition line (Z) are each a pixel unit (100"), and the control component corresponding to the upper pixel unit (100") can be Figure 5A The control component corresponding to the pixel unit (100") above the dividing line (L) and below the dividing line (L) may be Figure 5A Below the dividing line (L), two light-emitting components can be formed into a square array, and each is independently controlled by a corresponding control component.

[0034] However, the above embodiments are only used to illustrate the principles and effects of this application, and are not used to limit this application. Any person with ordinary knowledge in the technical field to which this application belongs can modify and change the above embodiments without violating the technical principles and spirit of this application. All equivalent changes and modifications made according to the shape, structure, characteristics and spirit described in the scope of the patent application of this application should be included in the scope of the patent application of this application.

[0035] Reference numerals

[0036] 100, 100', 100", 100"', 100"", P, P': pixels

[0037] 1: PCB substrate

[0038] 11: Red sub-pixel

[0039] 12, 14, 16, 18: Green sub-pixels

[0040] 13: Blue sub-pixel

[0041] R, R1: Red light components

[0042] G, G1, G2, G3, G4: Green light components

[0043] B, B1: Blue light component

[0044] 2, 21, 22, 23, 24, 25, 26, 27: control chip

[0045] 3, 31, 31', 32, 32', 33, 33', 33", 33"', 34, 34',

[0046] 35, 35', 35", 36, 36', 36", 36"', 37, 37': control channel

[0047] C, CR1, CG1, CB1, CR2, CG2, CB2, CR3, CG3,

[0048] CB3, CR4, CG4, CB4: control signals

[0049] 200, 300: Display module

[0050] S1, S2: square array

[0051] Z: Partition Line

[0052] L: Divider

Claims

1. A pixel unit (P), comprising: A plurality of sub-pixels (11-14) at least include a red sub-pixel (11), two green sub-pixels (12, 14) and a blue sub-pixel (13), wherein: The red sub-pixel is a red light component. The green sub-pixel is a green light component. The blue sub-pixel is a blue light component; a control element (2) outputting a control signal (C) to the sub-pixels, and A control channel (3), through which the control component outputs control signals (CR1, CG1, CB1) to the red light component, the green light component and the blue light component respectively, and the number of the control channel is the same as that of the green light component.

2. The pixel unit according to claim 1, wherein: The control channel is independently connected to the green light component one by one.

3. The pixel unit according to claim 1, wherein: All control channels are connected to the red light component.

4. The pixel unit according to claim 1, wherein: All control channels are connected to the blue light component.

5. The pixel unit according to claim 2, claim 3 or claim 4, wherein: The control channels are connected in parallel.

6. The pixel unit according to claim 1, wherein: The control signal can be current, voltage, circuit driving and calculation logic.

7. The pixel unit according to claim 1, wherein: The (total) brightness ratio of the red light component, the green light component and the blue light component is 3:6:

1.

8. A display module (200, 300), comprising: A plurality of pixel units (100) as claimed in claim 1, when the pixel unit has N green light components, N=4 or 6, the pixel units can form a square array in pairs.

9. The display module according to claim 8, wherein: The square array has a partition line, and the (total) number of components on both sides of the partition line (Z) is the same.

10. The display module according to claim 8, wherein: There is a separation line (L) between the control channels corresponding to the square array, and the separation line separates the control channels into two groups, which are independently controlled by the corresponding control components.

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