A circular display screen and a circular display device

Abstract

The application relates to a circular ring display screen, which comprises a circular ring display area, an outer frame surrounding the circular ring display area, an inner frame in the circular ring display area, a first DEMUX circuit, a second DEMUX circuit and a MUX circuit arranged on the circular ring display screen, the second DEMUX circuit is arranged at the upper end of the inner frame, the MUX circuit is arranged at the lower end of the inner frame, the first DEMUX circuit is arranged on one side of the outer frame close to the MUX circuit, the DATA line at the upper end in the circular ring display area is connected to the DATA line at the lower end in the circular ring display area in sequence through the second DEMUX circuit and the MUX circuit, and the DATA line at the lower end in the circular ring display area is connected to the source driver through the first DEMUX circuit. The application also relates to a circular ring display device comprising the circular ring display screen.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a circular ring display screen and a circular ring display device. BACKGROUND

[0002] With the rapid development of display technology, the application of display is also more and more extensive, and the shape of display is also changing. In addition to the application of notch screen, drop screen in mobile phone and circular, square, track shape in watch and bracelet, there are some displays applied to smart home and other devices, which requires the display to have a specific shape to adapt to these devices. The overall shape of the circular ring display is circular, and the display area is circular ring. Compared with the complete circular display area, the inner circle of the circular ring display lacks more pixels. The vertical DATA lines of the pixels at the upper end and the lower end of the circular ring are disconnected at the same time. In order to ensure the display performance of the display, the disconnected DATA lines need to be connected inside the inner circle of the circular ring. However, when the overall diameter of the circular ring is larger, the diameter of the inner circle is also larger, and the DATA lines to be connected are also more. This will increase the width of the inner frame of the circular ring, thereby affecting the display effect and unable to realize the high screen ratio of narrow frame. To this end, the width of Frit (also known as the width of the packaging area), the distance between Frit and the cutting edge, the line width of DATA line and the distance between DATA lines can be reduced to reduce the width of the inner frame of the circular ring. However, the above methods have limited effect on reducing the width of the inner frame of the circular ring, and also affect the reliability of the product, the cutting process in the later stage and the display performance of the product. SUMMARY

[0003] In view of the technical problems in the prior art, the present application provides a circular ring display screen, which comprises a circular ring display area, an outer frame surrounding the circular ring display area, and an inner frame in the circular ring display area. A first DEMUX circuit, a second DEMUX circuit and a MUX circuit are provided on the circular ring display screen. The second DEMUX circuit is arranged at the upper end of the inner frame, the MUX circuit is arranged at the lower end of the inner frame, the first DEMUX circuit is arranged on one side of the outer frame close to the MUX circuit, the DATA lines at the upper end of the circular ring display area are connected to the DATA lines at the lower end of the circular ring display area through the second DEMUX circuit and the MUX circuit in sequence, and the DATA lines at the lower end of the circular ring display area are connected to the source driver through the first DEMUX circuit.

[0004] Further, the first DEMUX circuit decomposes one signal into m signal channels in a ratio of 1:m, the MUX circuit composites m signal channels into one signal in a ratio of m:1, and the second DEMUX circuit decomposes one signal into m signal channels in a ratio of 1:m, m being an integer greater than 1.

[0005] Further, the value of m is any one of 2, 3, 6, 9, and 12. The ratio of the DEMUX circuit and the MUX circuit can be designed according to the actual required frame width, but on the other hand, the ratio of the DEMUX circuit and the MUX circuit is limited by the integrated circuit board (IC), that is, the function of the IC itself determines the ratio of the DEMUX circuit and the MUX circuit. Currently, the ICs on the market support the ratios of 1:2, 1:3, 1:6, 1:9, and 1:12, that is, the value of m is such that the added DEMUX circuit and MUX circuit are applicable to the existing IC.

[0006] Further, the number of the DATA lines at the upper end in the circular display area is S, the second DEMUX circuit is set in a ratio of 1:m, the MUX circuit is set in a ratio of m:1, the number of the S DATA lines after passing through the second DEMUX circuit is S / m, the number of the S / m DATA lines after passing through the MUX circuit is S, and S / m is a positive integer.

[0007] Further, the first DEMUX circuit is set in a ratio of 1:m, and the number of the S DATA lines after passing through the first DEMUX circuit is S / m.

[0008] Further, the inner frame is provided with a DATA line routing area, and the DATA lines at the upper end in the circular display screen are connected to the MUX circuit along the DATA line routing area after passing through the second DEMUX circuit.

[0009] Further, the outer frame is provided with a packaging area, and the packaging area is arranged on the side of the outer frame away from the circular display area.

[0010] Further, the inner frame is provided with a packaging area, and the packaging area is arranged on the side of the inner frame away from the circular display area.

[0011] The application further provides a circular display device, which comprises the circular display screen.

[0012] Compared with the prior art, the technical solution of the present invention has at least the following beneficial effects: the present invention adds a second DEMUX circuit at the upper end of the inner frame of the circular display and a MUX circuit at the lower end. The number of DATA lines at the upper end of the display area is greatly reduced after passing through the second DEMUX circuit, effectively reducing the width of the inner frame. After the DATA lines at the upper end of the display area pass through the second DEMUX circuit, the number of DATA lines is restored through the MUX circuit, thereby realizing the connection between the DATA lines at the upper end of the display area and the DATA lines at the lower end of the display area. After the DATA lines at the lower end of the display area extend to the outer frame and pass through the first DEMUX circuit, the number of DATA lines is also greatly reduced, thereby effectively reducing the width of the outer frame, thereby achieving the purpose of reducing the width of both the inner and outer frames, and realizing a high screen-to-body ratio with a narrow frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings further illustrate the present invention, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention.

[0014] Figure 1 It is a structural diagram of a circular display screen in the prior art;

[0015] Figure 2 for Figure 1 A magnified schematic diagram of point A in the middle;

[0016] Figure 3 for Figure 1 A magnified schematic diagram of point B in the middle;

[0017] Figure 4 A schematic structural diagram of a circular display screen provided in one embodiment;

[0018] Figure 5 for Figure 4 Enlarged schematic diagram of point C in the middle;

[0019] Figure 6 for Figure 4 The enlarged schematic diagram of point D in the middle;

[0020] Figure 7 for Figure 4 The wiring distribution diagram of the provided circular display screen;

[0021] Figure 8 for Figure 4 Circuit distribution diagram of the provided circular display screen.

[0022] Explanation of reference signs: 100 - circular display screen, 1 - display area, 11 - inner circle in display area, 12 - outer circle in display area, 2 - inner frame, 21 - inner circle cutting edge, 3 - outer frame, 31 - outer circle cutting edge, 4 - first DEMUX circuit, 5 - second DEMUX circuit, 6 - MUX circuit, 7 - DATA line, 8 - DATA line routing area, 9 - source driver. DETAILED DESCRIPTION

[0023] It should be understood that the specific embodiments described herein are merely exemplary and do not limit the present application.

[0024] Explanation of terms:

[0025] DEMUX circuit: belongs to data distributor, used to distribute the combined common signal into each independent signal channel;

[0026] MUX circuit: belongs to multiplexer, used to combine the independent signals in each signal channel into a common signal and transmit in the same direction, which is the reverse use of DEMUX circuit;

[0027] Circular display screen: the circular display screen in the present application is a top-emitting structure active organic light-emitting display, the glass substrate is composed of a buffer layer, an insulating layer, a gate layer, a via layer, an electrode layer, a planarization layer, an OLED anode layer, a pixel definition layer, and a support column layer, etc. After these film layers are completed through the processes of gluing, exposure, development, etc., the organic material and cathode layer are formed on the substrate by evaporation through an evaporation mask, and then the upper glass substrate is formed by a glass packaging method to isolate the influence of water and oxygen on the OLED device. After the above processes are completed, the upper and lower pieces of glass are bonded, and then the processes of thinning, cutting and splitting, IC & FPC binding, etc. are performed, so that the final circular display screen is completed.

[0028] The circular display screen has a large number of missing pixels in the inner circle (the pixels in the inner circle area are hollowed out) compared with the complete circular display area, which causes the longitudinal DATA lines of the upper and lower end pixels of the circular ring to be disconnected at the same time. In order to ensure the display performance of the display, the disconnected DATA lines need to be connected inside the inner circle of the circular ring, such as Figure 1 , Figure 2As shown, the number of pixels (PIXEL) at the upper and lower ends of the ring is the same, both 24 (here 24 is only used for illustration and does not represent the actual number of pixels). For this, 24 DATA lines 7 need to be set to connect the pixels at the upper and lower ends of the ring. At this time, the inner frame 2 needs to reserve enough space to accommodate the numerous DATA lines 7, which means that the width of the inner frame 2 is relatively large. In this case, reducing the Frit width, reducing the distance between the Frit and the cutting edge, reducing the DATA line width and the distance between the DATA lines, etc., has limited effect on achieving a high screen-to-body ratio of the circular display screen. In view of this, the present invention provides a circular display screen, such as Figure 4 As shown, a circular display screen 100 provided in one embodiment includes a circular display area 1, an outer frame 3 surrounding the display area 1, and an inner frame 2 within the display area 1. The area between the inner circle 11 of the display area and the outer circle 12 of the display area is the display area 1, the area between the inner circle cutting edge 21 and the inner circle 11 of the display area is the inner frame 2, and the area between the outer circle 12 of the display area and the outer circle cutting edge 31 is the outer frame 3. A second DEMUX circuit 5 is provided at the upper end of the inner frame 2, a MUX circuit 6 is provided at the lower end of the inner frame 2, and a first DEMUX circuit 4 is provided on the side of the outer frame 3 close to the MUX circuit 6. The DATA line 7 at the upper end of the display area 1 is connected to the DATA line 7 at the lower end of the display area 1 through the second DEMUX circuit 5 and the MUX circuit 6 in sequence. The DATA line 7 at the lower end of the display area 1 is connected to the source driver ( Figure 4 The number of the DATA lines 7 at the upper end of the display area 1 is reduced at a certain ratio after passing through the second DEMUX circuit 5. Since the DATA lines 7 at the upper end of the display area 1 are connected to the MUX circuit 6 along the DATA line routing area 8 on the inner frame 2 after passing through the second DEMUX circuit 5, the provision of the second DEMUX circuit 5 reduces the number of DATA lines 7. Therefore, compared with existing circular display screens, the area required for the DATA line routing area 8 for accommodating the DATA lines 7 is reduced, thereby reducing the required width of the inner frame 2, thereby achieving a narrow frame design.

[0029] like Figure 4 、 Figure 5 As shown, 24 PIXELs are provided at the upper end of the display area 1 (24 is used for illustration only and does not represent the actual number of pixels), and correspondingly 24 DATA lines 7 are provided to connect with the PIXELs. The second DEMUX circuit 5 decomposes a signal into 6 signal channels according to a ratio of 1:6, that is, after the DATA lines 7 pass through the second DEMUX circuit 5, every 6 DATA lines 7 will be merged into 1, and the 24 DATA lines 7 will be merged into 4 DATA lines 7 after passing through the second DEMUX circuit 5.

[0030] As Figure 4 , Figure 6 shown, 24 PIXELs are also provided at the lower end of the display area 1, and 4 DATA lines 7 extend along the DATA line routing area 8 to be connected to the MUX circuit 6, which combines 6 signal channels into one signal in a ratio of 6:1, i.e. each DATA line 7 is split into 6 DATA lines 7 after passing through the MUX circuit 6, and the 4 DATA lines 7 are split into 24 DATA lines 7 after passing through the MUX circuit 6, which are respectively connected to the corresponding PIXELs, thus completing the connection of the DATA lines 7 at the upper end of the display area 1 to the DATA lines 7 at the lower end of the display area 1. In comparison with Figure 1 shown, 24 DATA lines 7 are provided at the inner frame 2 of the circular display screen, and the second DEMUX circuit 5 and the MUX circuit 6 are provided at the inner frame 2 in this embodiment, so that the number of DATA lines 7 at the inner frame 2 is reduced to 4, i.e. the 4 DATA lines 7 can communicate the PIXELs at the upper end and the lower end of the display area 1, effectively reducing the width of the inner frame 2. When 120 PIXELs are provided at the upper end and the lower end of the display area 1, 120 DATA lines 7 are required, and the width of the 120 DATA lines 7 is about 480 um, while the number of DATA lines 7 is reduced from 120 to 20 through the provision of the second DEMUX circuit 5 and the MUX circuit 6, and the width of the 20 DATA lines 7 is about 85 um, i.e. the width of the DATA lines 7 is reduced by about 80%, which means that the width of the required inner frame 2 is reduced by about 80%, i.e. the width of the inner frame 2 is effectively reduced.

[0031] The ratio of the signal channel decomposition of the second DEMUX circuit 5 corresponds to the ratio of the signal channel combination of the MUX circuit 6, i.e. the second DEMUX circuit 5 decomposes one signal into m signal channels, and m is an integer greater than 1, and then the MUX circuit 6 combines the m signal channels into one signal. The value of m is not limited to 6, and m can also be any one of 2, 3, 9 and 12 according to the conventional IC design. It can be understood that the IC can be designed accordingly to meet the different ratio designs of the DEMUX circuit and the MUX circuit, i.e. the value of m is not limited to 2, 3, 6, 9 and 12. It should be noted that the greater the value of m, the less the charging time allocated to each PIXEL, which may cause the display screen to display unevenly, and in this case, the voltage can be adjusted to improve the uneven display, specifically, the parasitic capacitance of the DATA lines and other signal lines (including between the DATA lines) can be reduced as much as possible during the Panel Layout; or the Demura can be processed on the Source voltage of the IC.

[0032] As Figure 1 , Figure 4As shown in the prior art circular display screen and the circular display screen 100 provided by the embodiment, the first DEMUX circuit 4 is arranged at the bottom of the outer frame 3 to be connected with the source driver 9 arranged at the bottom of the outer frame 3. Specifically, as shown in Figure 3 As shown, the 24 DATA lines 7 extend to the bottom of the display area 1, pass through the first DEMUX circuit 4, and are connected to the source driver 9. The first DEMUX circuit 4 decomposes one signal into six signal channels according to the ratio of 1:6. The ratio of the first DEMUX circuit 4 is consistent with that of the second DEMUX circuit 5, so that the two can share the switch signal of the switch signal control line (SW). After passing through the first DEMUX circuit 4, every six DATA lines 7 are combined into one. After passing through the first DEMUX circuit 4, the 24 DATA lines 7 are combined into four DATA lines 7. The arrangement of the first DEMUX circuit 4 effectively reduces the area of the outer frame 3 for accommodating the DATA lines 7, that is, effectively reduces the width of the outer frame 3.

[0033] As shown in Figure 7 At the upper end of the display area 1, there are S DATA lines 7. The second DEMUX circuit 5 is arranged according to the ratio of 1:m, and m is 6. After passing through the second DEMUX circuit 5, the number of the S DATA lines 7 is S / 6, and S / 6 is a positive integer. The MUX circuit 6 is arranged according to the ratio of m:1, and m is 6. After passing through the MUX circuit 6, the number of the S / 6 DATA lines 7 is S. The S DATA lines 7 are connected to the lower end of the display area 1 and extend to the bottom of the display area 1, pass through the first DEMUX circuit 4, and are connected to the source driver 9. Specifically, as shown in Figure 7 、 Figure 8As shown, the S1_D signal is led out by the source driver 9, and through the first DEMUX circuit 4, signals are simultaneously provided to the 6 DATA lines 7 (DATA1_D, DATA2_D, DATA3_D, DATA4_D, DATA5_D, DATA6_D) at the bottom end of the display area 1, which are synchronously transmitted to the corresponding 6 DATA lines 7 at the lower end of the display area 1, and after the 6 DATA lines 7 at the lower end of the display area 1 are combined into one signal S1_U through the MUX circuit 6 and transmitted to the upper end of the display area 1, the signal is decomposed into 6 DATA lines 7 (DATA1_U, DATA2_U, DATA3_U, DATA4_U, DATA5_U, DATA6_U) after the first DEMUX circuit 4 and transmitted to the corresponding pixels. In the t1 stage, the S1_D provides a data voltage VDATA1, at this time, the M1_D, M1_C and M1_U switches are opened, and the voltages on the DATA1_D and DATA1_U lines are all equal to VDATA1; in the t2 stage, the M2_D, M2_C and M2_U switches are opened, and the voltages on the DATA2_D and DATA2_U lines are all equal to VDATA1; and the signal transmission and switch control are realized in this way.

[0034] The circular ring display screen 100 provided by the application is provided with the packaging area on the inner frame 2 and the outer frame 3, the packaging area on the inner frame 2 is arranged on one side close to the inner circular cutting edge 21, and the packaging area on the outer frame 3 is arranged on one side close to the outer circular cutting edge 31.

[0035] The circular ring display screen provided by the application is additionally provided with the second DEMUX circuit and the MUX circuit, that is, the signal output from the source driver is subjected to the multiple combining and decomposing processes in the transmission process, and the display unevenness phenomenon caused by the signal attenuation distortion or signal crosstalk may exist before and after the MUX circuit, the above phenomenon can be improved by adjusting the Source voltage to keep the charging voltage of each column of pixels consistent, specifically, in the Panel Layout, the parasitic capacitance of the DATA line and other signal lines (including between the DATA lines) is minimized, or the Demura is processed on the Source voltage of the IC.

[0036] According to the same inventive concept, the application further provides a circular display device, which comprises the circular display screen described above, and is provided with a circular display area, an outer frame surrounding the circular display area, and an inner frame in the circular display area. A second DEMUX circuit is arranged at the upper end of the inner frame, a MUX circuit is arranged at the lower end of the inner frame, a first DEMUX circuit is arranged on the outer frame and close to the side of the MUX circuit, the DATA line at the upper end of the circular display area is connected to the DATA line at the lower end of the circular display area in sequence through the second DEMUX circuit and the MUX circuit, and the DATA line at the lower end of the circular display area is connected to the source driver through the first DEMUX circuit.

[0037] The technical features of the above-described embodiments can be combined in any manner, and to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0038] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent right of the present application. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent right of the present application should be subject to the appended claims.

Claims

1. A circular display screen comprising a circular display area, an outer frame surrounding the circular display area, and an inner frame within the circular display area, characterized in that: The circular display screen is provided with a first DEMUX circuit, a second DEMUX circuit, and a MUX circuit. The second DEMUX circuit is provided at the upper end of the inner frame, the MUX circuit is provided at the lower end of the inner frame, and the first DEMUX circuit is provided on a side of the outer frame close to the MUX circuit. A DATA line routing area is provided on the inner frame. The DATA line at the upper end of the circular display area passes through the second DEMUX circuit and is then connected to the MUX circuit along the DATA line routing area. The MUX circuit is connected to the DATA line at the lower end of the circular display area. The DATA line at the lower end of the circular display area is connected to the source driver through the first DEMUX circuit. The ratio of the signal channel decomposition of the first DEMUX circuit is consistent with that of the second DEMUX circuit.

2. The circular display screen according to claim 1, characterized in that: The first DEMUX circuit decomposes a signal into m signal channels at a ratio of 1:m, the MUX circuit combines the m signal channels into one signal at a ratio of m:1, and the second DEMUX circuit decomposes a signal into m signal channels at a ratio of 1:m, where m is an integer greater than 1.

3. The circular display screen according to claim 2, characterized in that: The value of m is any one of 2, 3, 6, 9, and 12.

4. The circular display screen according to claim 3, characterized in that: The number of the DATA lines at the upper end of the circular display area is S, the second DEMUX circuit is set according to 1:m, and the MUX circuit is set according to m:

1. After the S DATA lines pass through the second DEMUX circuit, the number is S / m, and after the S / m DATA lines pass through the MUX circuit, the number is S, where S / m is a positive integer.

5. The circular display screen according to claim 4, characterized in that: The first DEMUX circuit is configured according to 1:m, and the number of the S DATA lines after passing through the first DEMUX circuit is S / m.

6. The circular display screen according to claim 1, characterized in that: A packaging area is provided on the outer frame, and the packaging area is provided on a side of the outer frame away from the annular display area.

7. The circular display screen according to claim 1, characterized in that: A packaging area is provided on the inner frame, and the packaging area is provided on a side of the inner frame away from the annular display area.

8. A circular display device, characterized in that: The annular display device comprises the annular display screen according to any one of claims 1 to 7, and is provided with the annular display area, the outer frame surrounding the annular display area, and the inner frame located within the annular display area.

9. The annular display device according to claim 8, characterized in that: The second DEMUX circuit is provided at the upper end of the inner frame, the MUX circuit is provided at the lower end of the inner frame, and the first DEMUX circuit is provided on the side of the outer frame close to the MUX circuit. The DATA line at the upper end of the circular display area is connected to the DATA line at the lower end of the circular display area through the second DEMUX circuit and the MUX circuit in sequence, and the DATA line at the lower end of the circular display area is connected to the source driver through the first DEMUX circuit.

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