Driver of a display panel

Abstract

This invention provides a driver for a display panel, comprising at least one driving circuit that generates a plurality of first-type driving signals and a plurality of second-type driving signals to drive a plurality of pixels of the display panel. The plurality of pixels includes a plurality of adjacent first pixels and a plurality of second pixels. Each pixel includes a first display element, a second display element, and a third display element. The plurality of first-type driving signals drive the first, second, and third display elements of the plurality of first pixels, and the plurality of second-type driving signals drive the first, second, and third display elements of the plurality of second pixels. A first pulse of the plurality of first-type driving signals and a second pulse of the plurality of second-type driving signals are located in different time segments. Using the driver of this invention can avoid current concentration and improve display quality.

Description

Technical Field

[0001] This invention relates to a driver, and more particularly to a driver for a display panel. Background Technology

[0002] Display devices have become essential components of electronic products for displaying information. They have evolved from liquid crystal displays (LCDs) to Mini LED and Micro LED displays. LEDs, as display elements, enhance the display quality. However, current technologies for driving these LEDs can cause current concentration, increasing electromagnetic interference (EMI) and thus affecting display quality.

[0003] Based on the above, the present invention provides a driver for a display panel, which can solve the problem of current concentration, reduce EMI, and improve display quality. Summary of the Invention

[0004] One objective of this invention is to provide a driver for a display panel that uses different types of driving signals to drive the display elements of multiple pixels in the display panel, thereby avoiding current concentration, reducing electromagnetic interference, and improving display quality.

[0005] The present invention provides a driver for a display panel, comprising at least one driving circuit that generates a plurality of first-type driving signals and a plurality of second-type driving signals to drive a plurality of pixels of the display panel. These pixels include a plurality of adjacent first pixels and a plurality of second pixels. Each pixel includes a first display element, a second display element and a third display element. The first-type driving signals drive the first display elements, second display elements and third display elements of the first pixels. The second-type driving signals drive the first display elements, second display elements and third display elements of the second pixels. A first pulse of the first-type driving signals and a second pulse of the second-type driving signals are in different time segments. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of an embodiment of the driving architecture of the present invention;

[0007] Figure 2 This is a block diagram of an embodiment of the driver and display element of the present invention;

[0008] Figure 3 This is a block diagram of an embodiment of the controller and driver of the present invention;

[0009] Figure 4This is a schematic diagram of an embodiment of the display element of the present invention;

[0010] Figure 5 This is a schematic diagram of an embodiment of the first type of driving signal of the present invention;

[0011] Figure 6 This is a schematic diagram of an embodiment of the second type of driving signal of the present invention;

[0012] Figure 7 This is a schematic diagram of an embodiment of the third type of driving signal of the present invention;

[0013] Figures 8 to 18 This is a schematic diagram of various embodiments of the driving pixels of the present invention.

[0014] Symbol Explanation

[0015] 1 Controller

[0016] 2 drives

[0017] 4 Display elements

[0018] 6 Enable circuit

[0019] 7. Storage Circuit

[0020] 9. Drive Circuit

[0021] 10 Display Panel

[0022] Din Input Data

[0023] DCK timing signal

[0024] EN enable signal

[0025] PWMCLK clock signal

[0026] R Red Display Element

[0027] G Green Display Components

[0028] B Blue display element Detailed Implementation

[0029] To provide a better understanding of the features and effects achieved by the present invention, the following examples and descriptions are provided:

[0030] Certain terms are used in the specification and claims to refer to specific elements. However, those skilled in the art will understand that manufacturers may use different names to refer to the same element. Furthermore, the specification and claims do not distinguish elements by differences in name, but rather by differences in the overall technical aspects of the elements. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." Moreover, the term "coupled" here includes any direct and indirect means of connection. Therefore, if a first device is described as coupled to a second device, it means that the first device can be directly connected to the second device, or can be indirectly connected to the second device through other devices or other means of connection.

[0031] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of an embodiment of the driver architecture of the present invention. Figure 2 This is a block diagram of an embodiment of the driver and display element of the present invention. As shown, the driving architecture includes a controller 1 and a plurality of drivers 2 to drive a plurality of pixels of the display panel 10 to display an image. The drivers 2 are arranged in multiple columns, and each driver 2 is coupled to a plurality of display elements 4 to drive these display elements 4 to emit light. In one embodiment of the present invention, these display elements 4 may be sub-millimeter light-emitting diodes or micro-light-emitting diodes. In one embodiment of the present invention, each pixel includes three display elements 4, which are a red display element R, a green display element G, and a blue display element B (e.g., ...). Figure 4 (As shown). Controller 1 is coupled to these drivers 2 and transmits an input data Din, a timing signal DCK, a clock signal PWMCLK, and an enable signal EN to the drivers 2. In one embodiment of the invention, controller 1 may be a separate chip. Since these drivers 2 are arranged in multiple columns, pixels arranged in rows and columns on the display panel 10 can be controlled.

[0032] Please see Figure 3This is a block diagram of an embodiment of the controller and driver of the present invention. As shown, each driver 2 includes an enable circuit 6, a storage circuit 7, and a drive circuit 9. The enable circuit 6 receives an enable signal EN and enables the storage circuit 7 to receive input data Din according to the timing signal DCK. The drive circuit 9 is coupled to the storage circuit 7 and the display elements 4, and generates multiple drive signals according to the input data Din received by the storage circuit 7 and the clock signal PWMCLK to drive the display elements 4 to generate light so as to display images. When the first driver 2 drives the display elements 4, the enable circuit 6 of the first driver 2 disables the storage circuit 7 of the first driver 2 and sends an enable signal EN to the enable circuit 6 of the second driver 2 to perform the above-mentioned operation and drive the display elements 4 coupled to the second driver 2, and so on.

[0033] Please see Figure 4 This is a schematic diagram of an embodiment of the display element of the present invention. As shown in the figure, the display element may be a red display element R, a green display element G, and a blue display element B. One end of the red display element R, the green display element G, and the blue display element B is coupled to a supply voltage VDD. A switch MOS is coupled between the other end of these display elements R, G, and B and a current sink I. The drive signal generated by the drive circuit 9 is used to control the switch MOS to drive current to flow through these display elements R, G, and B to generate light.

[0034] Please refer to the following: Figure 5 This is a schematic diagram of an embodiment of the first type of driving signal of the present invention. As shown in the figure, the driving circuit 9 generates a plurality of first type driving signals. These first type driving signals have a signal period and a plurality of first pulses. These first pulses are respectively located in a time segment before the signal period. The driving circuit 9 determines the width of these first pulses according to the input data Din stored in the corresponding storage circuit 7. The larger the width of the first pulse, the longer the driving time of the display element 4 is, and thus the higher the brightness. Figure 5 Three first pulses of different widths are displayed. In this embodiment, a plurality of first pixels driven by these first-type driving signals are represented by white boxes.

[0035] Please refer to the following: Figure 6This is a schematic diagram of an embodiment of the second type of driving signal of the present invention. As shown, the driving circuit 9 generates multiple second type driving signals, which have a signal period and multiple second pulses. These second pulses are located in a time segment after the signal period. The driving circuit 9 determines the width of these second pulses based on the input data Din stored in the corresponding storage circuit 7. The larger the width of the second pulse, the longer the driving time of the display element 4 is, thus resulting in higher brightness. As can be seen from the above, according to the signal period, the second pulse and the first pulse are located in different time segments, and the start time of the second pulse is different from the start time of the first pulse. Figure 6 Three second pulses of different widths are displayed. In this embodiment, a plurality of second pixels driven by these second-type driving signals are represented by black boxes. In one embodiment of the invention, the second pulses of these second-type driving signals may be located in a time segment of the signal period, such as... Figure 7 As shown.

[0036] Please refer to the following: Figure 7 This is a schematic diagram of an embodiment of the third type of driving signal of the present invention. As shown in the figure, the driving circuit 9 generates a plurality of third type driving signals. These third type driving signals have a signal period and a plurality of third pulses. These third pulses are located in a time segment of the signal period. The time segment is located after the previous time segment and before the next time segment. The driving circuit 9 determines the width of these third pulses according to the input data Din stored in the corresponding storage circuit 7. The larger the width of the third pulse, the longer the driving time of the display element 4 is, and thus the higher the brightness. Figure 7 Three third pulses of different widths are displayed. In this embodiment, horizontal bars represent multiple third pixels driven by these third-type driving signals.

[0037] This invention uses these first type of driving signals, these second type of driving signals, and these third type of driving signals to drive pixels, thereby avoiding current concentration, reducing electromagnetic interference, and improving display quality.

[0038] Please refer to the following: Figure 8The driving circuit 9 generates these first-type driving signals to drive a plurality of first pixels located in odd-numbered columns, with each first pixel driving three display elements 4. Furthermore, the driving circuit 9 generates these second-type driving signals to drive a plurality of second pixels located in even-numbered columns, with each second pixel driving three display elements 4. In this embodiment, the first pixels and the second pixels are adjacent. In one embodiment of the invention, the first-type driving signals can be used to drive pixels located in adjacent columns, for example, driving pixels located in the first and second columns, and the second-type driving signals can be used to drive pixels located in the third and fourth columns.

[0039] Please refer to the following: Figure 9 The driving circuit 9 generates these first-type driving signals to drive pixels located in odd-numbered columns. Furthermore, the driving circuit 9 generates these third-type driving signals to drive pixels located in even-numbered columns. These third-type driving signals drive the three display elements 4 within the pixels. In one embodiment of the invention, the first-type driving signals can be used to drive pixels located in adjacent columns, for example, driving pixels located in the first and second columns, and the third-type driving signals can be used to drive pixels located in the third and fourth columns.

[0040] Please refer to the following: Figure 10 The driving circuit 9 generates these second-type driving signals to drive pixels located in odd-numbered columns. Furthermore, the driving circuit 9 generates these third-type driving signals to drive pixels located in even-numbered columns. In one embodiment of the invention, these second-type driving signals can be used to drive pixels located in adjacent columns, for example, driving pixels located in the first and second columns, and the third-type driving signals can be used to drive pixels located in the third and fourth columns.

[0041] Please refer to the following: Figure 11 The driving circuit 9 generates these first-type driving signals to drive pixels located in odd-numbered columns. Furthermore, the driving circuit 9 generates these second-type driving signals to drive pixels located in even-numbered columns. In one embodiment of the invention, these first-type driving signals can be used to drive pixels located in adjacent columns, for example, driving pixels located in the first and second columns, and the second-type driving signals can be used to drive pixels located in the third and fourth columns.

[0042] Please refer to the following: Figure 12 The driving circuit 9 generates these first-type driving signals to drive pixels located in odd-numbered rows. Furthermore, the driving circuit 9 generates these third-type driving signals to drive pixels located in even-numbered rows. In one embodiment of the invention, the first-type driving signals can be used to drive pixels located in adjacent rows, for example, driving pixels located in the first and second rows, and the third-type driving signals can be used to drive pixels located in the third and fourth rows.

[0043] Please refer to the following: Figure 13 The driving circuit 9 generates these second-type driving signals to drive pixels located in odd-numbered rows. Furthermore, the driving circuit 9 generates these third-type driving signals to drive pixels located in even-numbered rows. In one embodiment of the invention, these second-type driving signals can be used to drive pixels located in adjacent rows, for example, driving pixels located in the first and second rows, and the third-type driving signals can be used to drive pixels located in the third and fourth rows.

[0044] Please refer to the following: Figures 14 to 18 It uses a combination of these first-type drive signals, these second-type drive signals, and these third-type drive signals to drive the pixels of the display panel.

[0045] Therefore, the present invention is a novel, inventive and practical technical solution. However, the above description is only one embodiment of the present invention and is not intended to limit the scope of the present invention. Therefore, all equivalent changes and modifications made in accordance with the structure, features and spirit described in the claims of the present invention should be included within the protection scope of the present invention.

Claims

1. A driver for a display panel, characterized in that, Include: At least one driving circuit generates a plurality of first-type driving signals and a plurality of second-type driving signals based on an input data. The plurality of first-type driving signals and the plurality of second-type driving signals drive a plurality of pixels of the display panel. The plurality of pixels include a plurality of adjacent first pixels and a plurality of second pixels. Each pixel includes a first display element, a second display element, and a third display element. The plurality of first-type driving signals drive the first display element, the second display element, and the third display element of the plurality of first pixels. The plurality of second-type driving signals drive the first display element, the second display element, and the third display element of the plurality of second pixels. The driving circuit determines the width of a first pulse of the plurality of first-type driving signals and the width of a second pulse of the plurality of second-type driving signals based on the input data. The plurality of first-type driving signals and the plurality of second-type driving signals have a signal period. Based on the signal period, the first pulse of the plurality of first-type driving signals and the second pulse of the plurality of second-type driving signals are located in different time segments.

2. The driver as claimed in claim 1, characterized in that, It also includes: A storage circuit, coupled to the driving circuit, stores the input data; and An enable circuit, coupled to the storage circuit, enables the storage circuit to receive the input data in order to store the input data; Wherein, the first pulse of the plurality of first-type driving signals is located at a different start time in the signal period than the second pulse of the plurality of second-type driving signals is located at a different start time in the signal period.

3. The driver as claimed in claim 1, characterized in that, The first pulse of the plurality of first-type driving signals and the second pulse of the plurality of second-type driving signals are located in different time segments of the signal period.

4. The driver as claimed in claim 1, characterized in that, The first pulse of the plurality of first-type driving signals is located in a time segment before the signal period, and the second pulse of the plurality of second-type driving signals is located in a time segment after the signal period.

5. The driver as claimed in claim 1, characterized in that, The first pulse of the plurality of first-type driving signals is located in a pre-time segment of the signal period, and the second pulse of the plurality of second-type driving signals is located in a mid-time segment of the signal period, the mid-time segment being located after the pre-time segment.

6. The driver as claimed in claim 1, characterized in that, The driving circuit generates multiple third-type driving signals based on the input data. The driving circuit determines the width of a third pulse of the multiple third-type driving signals based on the input data. The multiple pixels include multiple third pixels. The multiple third-type driving signals drive the first display element, the second display element, and the third display element of the multiple third pixels. The third pulse of the multiple third-type driving signals, the first pulse of the multiple first-type driving signals, and the second pulse of the multiple second-type driving signals are located in different time segments of the signal period.

7. The driver as claimed in claim 6, characterized in that, The first pulse of the plurality of first-type driving signals is located in a pre-time segment of the signal period, the second pulse of the plurality of second-type driving signals is located in a post-time segment of the signal period, and the third pulse of the plurality of third-type driving signals is located in a mid-time segment of the signal period.

8. A driver for a display panel, characterized in that, Include: At least one driving circuit generates a plurality of first-type driving signals and a plurality of second-type driving signals based on an input data. The driving circuit determines the width of a first pulse of the plurality of first-type driving signals and the width of a second pulse of the plurality of second-type driving signals based on the input data. The plurality of first-type driving signals and the plurality of second-type driving signals have a signal period. Based on the signal period, the first pulse of the plurality of first-type driving signals and the second pulse of the plurality of second-type driving signals are located in different time segments.

9. The driver as claimed in claim 8, characterized in that, The driving circuit generates multiple third-type driving signals based on the input data. The driving circuit determines the width of a third pulse of the multiple third-type driving signals based on the input data. The multiple third-type driving signals have the signal period. Based on the signal period, the third pulse of the multiple third-type driving signals, the first pulse of the multiple first-type driving signals, and the second pulse of the multiple second-type driving signals are located in different time segments of the signal period.

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