Method for improving resolution ratio of cylindrical rotary display screen

Abstract

The invention relates to a method for improving resolution of a cylindrical rotary display screen, which comprises the following steps that: when a light bar substrate rotates, each LED chip on a light-emitting bar and an LED chip at the horizontal corresponding position of one or two adjacent light-emitting bars form a second light-emitting group, and the second light-emitting group at least comprises a group of red, green and blue chips; each second light-emitting group corresponds to a pixel point of a picture needing to be displayed, when a certain chip of the second light-emitting group reaches the position of the pixel point at the first moment, two chips of other colors reach the pixel point at the second moment and / or the third moment, and the three chips of the second light-emitting group are controlled to display the color corresponding to the pixel. The method has the advantages that the LED chips in different rows are overlapped in spatial positions at different times, the three LED chips in different rows can be further grouped, and compared with the mode that lamp beads are inserted among the lamp beads to improve the resolution, the resolution can be further improved.

Description

Technical Field

[0001] The invention belongs to the field of electronic technology, and in particular relates to a method for improving the resolution of a cylindrical rotating display screen. Background Art

[0002] A display is an output device that can display electronic information (such as text, images, videos, etc.) in a visible form for people to watch and interpret. Displays usually include screens, circuit boards, power supplies, etc., and can be divided into CRT displays, LCD displays, OLED displays, etc. according to the technology type. POV is one of the important principles for displays to display images. Many modern displays, such as LED displays and electronic ink screens, use the POV principle to present images. By quickly switching different images or pixels on the screen and using the visual persistence effect of the human eye, these images or pixels are superimposed on the retina, thereby presenting a continuous dynamic image or static image. Therefore, POV is one of the key technologies for displays to display images.

[0003] However, in actual applications, since most displays use the traditional SMT lamp bar design, this design method results in a large spacing between the lamp beads on adjacent light bars, resulting in poor display accuracy and can no longer meet market demand. Summary of the invention

[0004] In order to improve the problem that the distance between lamp beads on adjacent light bars is large and easily leads to poor display accuracy, the present invention provides a method for improving the resolution of a cylindrical rotating display screen, and the specific technical scheme is as follows: the cylindrical rotating display screen includes a driving motor, a control board and a light bar substrate, the driving motor is used to drive the light bar substrate to rotate, at least one light bar is provided on the light bar substrate, the length direction of the light bar substrate is parallel to the direction of the rotation center axis of the driving motor, and the control board is used to control the light bar to emit light to display an image; characterized in that the method for improving the resolution includes: Each of the light strips comprises a plurality of first light-emitting groups, and the plurality of first light-emitting groups are arranged along the length direction of the light strip substrate; the first light-emitting groups comprise a plurality of LED chips, and the LED chips can be red chips and / or green chips and / or blue chips; When the light bar substrate rotates, each LED chip on the light bar and the LED chips at the horizontal corresponding positions of one or two adjacent light bars form a second light-emitting group, and the second light-emitting group includes at least one red chip, one green chip, and one blue chip; Each of the second light-emitting groups corresponds to a pixel point of the image to be displayed. When one of the chips of the second light-emitting group reaches the pixel point at the first moment, the other two chips reach the pixel point at the second and / or third moment, and the three chips of the second light-emitting group are controlled to display the color corresponding to the pixel.

[0005] When the light strip substrate is driven to rotate, two or three adjacent light strips overlap each other, and the red chip on one light strip is combined with the green chip and the blue chip on two or three adjacent light strips to form a new pixel point, namely the second light-emitting group, to display the pixel points of the picture to be displayed, thereby improving the pixel of the display.

[0006] In a specific possible implementation manner, the plurality of LED chips of the first light-emitting group are arranged along the length direction of the light bar substrate; or the plurality of LED chips of the first light-emitting group are arranged in a staggered manner with two adjacent ones.

[0007] Since the first light-emitting groups are arranged at intervals, black stripes are likely to appear between the first light-emitting groups, which affects the pixels of the display. Therefore, the pixels of the display can be increased by overlapping the light-emitting groups of adjacent light-emitting bars.

[0008] In a specific possible implementation manner, when there are two light-emitting bars, the first light-emitting groups of adjacent light-emitting bars are staggered.

[0009] In a specific possible implementation manner, when the plurality of LED chips of each first light-emitting group are arranged along the length direction of the light bar substrate; The horizontal center distance between two adjacent LED chips of the same first light-emitting group is A, the distance between two adjacent first light-emitting groups is B, the number of first light-emitting strips on the same light-strip substrate is N, and A=B / N / 3*2.

[0010] In a specific possible implementation manner, when two adjacent LED chips in the plurality of LED chips in each of the first light-emitting groups are arranged in a staggered manner; The horizontal center distance between two adjacent LED chips of the same first light-emitting group is a, the distance between two adjacent first light-emitting groups is b, the number of light-emitting strips on the same light-strip substrate is n, and a=b / n / 3.

[0011] In a specific possible implementation manner, when there is one light bar substrate, there are at least two first light-emitting strips on the light bar substrate; When there are at least two light bar substrates, there is at least one light bar on the light bar substrate.

[0012] In a specific possible implementation manner, a protective film layer for covering the light-emitting groups is provided on the light bar substrate.

[0013] In a specific possible implementation manner, a light bar sheath is provided on a side of the light bar substrate away from the protective film layer.

[0014] The protective film layer on the front side of the light strip substrate and the light strip sheath on the back side can increase the overall strength of the light strip and reduce the risk of dust accumulation, thereby ensuring reliability. On the other hand, the LED chip is protected by the protective film layer and has a smooth surface, thereby reducing air resistance.

[0015] In a specific implementation manner, there are three light strips, the LED chips on the first light strip are all red chips, the LED chips on the second light strip are all green chips, and the LED chips on the third light strip are all blue chips.

[0016] In a specific possible implementation manner, there are two light-emitting strips, and the plurality of LED chips in each of the first light-emitting groups include red, green and blue chips.

[0017] In a specific possible implementation mode, the LED chip is fixed on the light-emitting strip by a COB process.

[0018] The beneficial technical effect of the present invention is as follows: when the driving motor drives the light strip substrate to rotate, each LED chip on the light strip and the other two LED chips at the horizontally corresponding positions of one or two adjacent light strips form a second light-emitting group, so that they can correspond to the pixel points of the picture to be displayed. Compared with the method of improving the resolution by inserting lamp beads between lamp beads, the resolution can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the exploded structure of the light bar in the embodiment of the present invention.

[0020] Figure 2 Schematic diagram of the structure of the LED chip in the embodiment of the present invention.

[0021] Figure 3 It is a schematic diagram of the structure in which LED chips are arranged horizontally in an embodiment of the present invention.

[0022] Figure 4 It is a schematic diagram of the structure of A and B in the embodiment of the present application.

[0023] Figure 5 It is a schematic diagram of the structure in which LED chips are arranged diagonally in an embodiment of the present invention.

[0024] Figure 6 It is a schematic diagram of the structure of a and b in the embodiment of the present application.

[0025] Figure 7 It is a schematic diagram of the structure of the first row of LED chips and the second row of LED chips in the embodiment of the present application.

[0026] Figure 8 It is a schematic diagram of the structure of two light strips overlapping during operation in an embodiment of the present application.

[0027] Fig. 9 It is a schematic diagram of the structure of overlapping LED chips of two light-emitting strips in the embodiment of the present application.

[0028] Explanation of the accompanying drawings: 1. light strip substrate; 2. light strip; 3. first light-emitting group; 4. LED chip; 5. red chip; 6. green chip; 7. blue chip; 8. protective film layer; 9. light strip sheath; 10. driving chip; 11. connector; 12. second light-emitting group. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-9 The present invention is described in further detail.

[0030] Reference Figure 1 A method for improving the resolution of a cylindrical rotating display screen, wherein the cylindrical rotating display screen includes a frame, a driving motor and a control board are respectively arranged on the frame, a light bar substrate 1 is arranged on the driving motor, and the length direction of the light bar substrate 1 is parallel to the direction of the rotation center axis of the driving motor.

[0031] At least one light bar 2 is provided on the light bar substrate 1. The control board is used to control the light bar 2 to emit light and display images. The light bar 2 is arranged along the length direction of the light bar substrate 1. When there is one light bar substrate 1, there are at least two light bars 2 on the light bar substrate 1; when there are at least two light bar substrates 1, there is at least one light bar 2 on the light bar substrate 1. In this embodiment, there is one light bar substrate 1 and two light bars 2. The two light bars 2 are arranged along the width direction of the light bar substrate 1.

[0032] Each light bar 2 includes a plurality of first light-emitting groups 3 , which are arranged along the length direction of the light bar substrate 1 , and the first light-emitting groups 3 of adjacent light bars 2 are staggered.

[0033] refer to Figure 1 and Figure 2 Each first light-emitting group 3 includes a plurality of LED chips 4, and the LED chips 4 can be red chips 4 and / or green chips 6 and / or blue chips 7; the LED chips 4 are mounted on the light bar substrate 1 by a COB process, i.e., a flip-chip die bonding method.

[0034] refer to Figure 7-9When the light bar substrate 1 rotates, each LED chip 4 on the light bar 2 and the LED chips 4 at the horizontal corresponding positions of one or two adjacent light bars 2 form a second light-emitting group 12, and the second light-emitting group 12 includes at least one red chip 5, one green chip 6, and one blue chip 7; Each second light-emitting group 12 corresponds to a pixel point of the image to be displayed. When the chip 4 of one of the second light-emitting groups 12 reaches the pixel point at the first moment, the other two chips 4 reach the pixel point at the second and / or third moment, and the three chips 4 of the second light-emitting group 12 are controlled to display the color corresponding to the pixel.

[0035] A driver chip 10 is welded on the side of the light strip substrate 1 facing away from the LED chip 4. The driver chip 10 drives the red chip 5, the green chip 6, and the blue chip 7 to open and close. The driving mode is common anode or common cathode scanning. Only one row of LED chips 4 is lit in each lighting cycle. In each scanning cycle, several rows of LED chips 4 on the light strip substrate 1 are lit in turn.

[0036] A connector 11 is provided at the end of the light bar substrate 1, and the connector 11 is used to connect the light bar substrate 1 and the control board. A protective film layer 8 for covering the first light-emitting group 3 is provided on the light bar substrate 1. In this embodiment, the protective film layer 8 is transparent and is specifically an epoxy resin layer. The transparent protective film layer 8 can be designed to be a frosted or matte material to reduce the impact of reflection on the display effect. A light bar sheath 9 is provided on the side of the light bar substrate 1 away from the protective film layer 8.

[0037] In this embodiment, the plurality of LED chips 4 at least include a red chip 5 , a green chip 6 , and a blue chip 7 .

[0038] In other embodiments, there are three light strips 2 , the LED chips 4 on the first light strip 2 are all red chips 5 , the LED chips 4 on the second light strip 2 are all green chips 6 , and the LED chips 4 on the third light strip 2 are all blue chips 7 .

[0039] refer to Figure 3 The LED chips 4 of each first light-emitting group 3 are arranged along the length direction of the light bar substrate 1, that is, arranged horizontally.

[0040] refer to Figure 4 In this arrangement, the horizontal center distance between two adjacent LED chips 4 of the same first light-emitting group 3 is A, the distance between two adjacent first light-emitting groups 3 is B, the number of light-emitting strips 2 on the same light-strip substrate 1 is N, and A=B / N / 3*2.

[0041] refer to Figure 5 Among the plurality of LED chips 4 of each first light-emitting group 3, two adjacent LED chips 4 are staggered, that is, arranged diagonally.

[0042] refer to Figure 6 In this arrangement, the horizontal center distance between two adjacent LED chips 4 of the same first light-emitting group 3 is a, the distance between two adjacent first light-emitting groups 3 is b, the number of light-emitting strips 2 on the same light-strip substrate 1 is n, and a=b / n / 3.

[0043] This embodiment also discloses a method for improving resolution, including: The processor obtains image information and driving signals; The processor decodes the acquired image information to generate a digital signal, and transmits the digital signal to the driver chip 10. The driver chip 10 receives the digital signal and transmits it to the LED chip 4 to drive the LED chip 4 to turn on and off. The processor in the motor driver board uses the acquired drive signal to drive the rotor in the drive motor to rotate, thereby driving the light bar to rotate: When there are at least two light bar substrates 1, when the light bar substrates 1 rotate, at one moment, two adjacent LED chips 4 on one light bar substrate 1 overlap with the LED chip 4 on the next light bar substrate 1 to form a red chip 5, a green chip 6, and a blue chip 7, that is, a second light emitting group 12 is formed; When there is one light strip substrate 1, there are at least two light strips 2 on the light strip substrate 1. When the light strip substrate 1 rotates, two adjacent LED chips 4 on the previous light strip 2 on the light strip substrate 1 overlap with the LED chip 4 on the next light strip 2 to form a red chip 5, a green chip 6, and a blue chip 7, thereby constituting a second light-emitting group 12.

[0044] When there is one light bar substrate 1, and two light bars 2 are provided on the light bar substrate 1, for example: When the driving motor drives the light bar substrate 1 to rotate, the LED chip 4 on the light bar substrate 1 rotates. Figure 7 , the light bar 2 marked with the number "1" is in the first row, and the light bar 2 marked with the number "2" is in the second row. Figure 8 and Fig. 9, the driving motor drives the light bar substrate 1 to rotate for a period of time, and the light bar 2 marked with the number "2" moves a distance, so that the second row of LED chips 4 runs to the horizontal position of the first row at the previous moment. That is, the current position of the second row of LED chips 4 overlaps with the first row of LED chips 4. Regrouping the LED chips 4 at the overlapping position, it can be found that the red chip 5 and green chip 6 of the first row at the previous moment and the blue chip 7 at the corresponding position of the second row at this moment, the green chip 6 and blue chip 7 of the first row at the previous moment and the red chip 5 at the corresponding position of the second row at this moment, and the red chip 5 and blue chip 7 of the first row at the previous moment and the green chip 6 at the corresponding position of the second row at this moment, can form three second light-emitting groups 12, so that a complete red / green / blue grouping can be formed, that is, three complete pixels.

[0045] Each second light-emitting group 12 corresponds to a pixel point of the image to be displayed. When the red chip 5 of the second light-emitting group 12 reaches the pixel point at the first moment, the two chips of other colors reach the pixel point at the second and / or third moment, and the three chips of the second light-emitting group 12 are controlled to display the color corresponding to the pixel.

[0046] The horizontal position of each pixel is the center of the corresponding position LED chip 4 on the first row or the second row at the center of the group. Therefore, through this new grouping method, the actual horizontal resolution is the sum of the number of LEDs of all colors in all rows. Since each group of LED chips 4 on each row contains red chips 5, green chips 6 and blue chips 7 when designing the light strip 2, the horizontal resolution = the number of light groups 3 in each row * the number of rows * 3. Compared with the display method of inserting ordinary lamp beads between lamp beads, the resolution is increased by three times, thereby improving the picture accuracy.

[0047] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for improving the resolution of a cylindrical rotating display screen, the cylindrical rotating display screen comprising a driving motor, a control panel and a light bar substrate (1), the driving motor being used to drive the light bar substrate (1) to rotate, the light bar substrate (1) being provided with at least one light bar (2), the length direction of the light bar substrate (1) being parallel to the direction of the rotation center axis of the driving motor, the control panel being used to control the light bar (2) to emit light and display an image; characterized in that: The method for improving the resolution comprises: Each of the light strips (2) comprises a plurality of first light-emitting groups (3), and the plurality of first light-emitting groups (3) are arranged along the length direction of the light strip substrate (1); the first light-emitting groups (3) comprise a plurality of LED chips (4), and the LED chips (4) can be red chips (5) and / or green chips (6) and / or blue chips (7); When the light bar substrate (1) rotates, each LED chip (4) on the light bar (2) and the LED chips (4) at horizontally corresponding positions of one or two adjacent light bars (2) form a second light-emitting group (12), wherein the second light-emitting group (12) comprises at least one red chip (5), one green chip (6), and one blue chip (7); Each of the second light-emitting groups (12) corresponds to a pixel point of a picture to be displayed, and when a chip (4) of one of the second light-emitting groups (12) reaches the pixel point at a first moment, the other two chips (4) reach the pixel point at a second and / or third moment, and the three chips (4) of the second light-emitting group (12) are controlled to display a color corresponding to the pixel.

2. The method for improving the resolution of a cylindrical rotating display screen according to claim 1, characterized in that: The plurality of LED chips (4) of the first light-emitting group (3) are arranged along the length direction of the light bar substrate (1); Alternatively, the plurality of LED chips (4) of the first light-emitting group are arranged in a staggered manner with two adjacent ones.

3. The method for improving the resolution of a cylindrical rotating display screen according to claim 1, characterized in that: When there are two light-emitting strips (2), the first light-emitting groups (3) of adjacent light-emitting strips (2) are arranged in a staggered manner.

4. The method for improving the resolution of a cylindrical rotating display screen according to claim 1, characterized in that: When the plurality of LED chips (4) of each of the first light-emitting groups (3) are arranged along the length direction of the light bar substrate (1); The horizontal center distance between two adjacent LED chips (4) of the same first light-emitting group (3) is A, the distance between two adjacent first light-emitting groups (3) is B, the number of light-emitting strips (2) on the same light-strip substrate (1) is N, and A=B / N / 3*2.

5. The method for improving the resolution of a cylindrical rotating display screen according to claim 1, characterized in that: When two adjacent LED chips (4) among the plurality of LED chips (4) in each of the first light-emitting groups (3) are arranged in a staggered manner; The horizontal center distance between two adjacent LED chips (4) of the same first light-emitting group (3) is a, the distance between two adjacent first light-emitting groups (3) is b, the number of light-emitting strips (2) on the same light-strip substrate (1) is n, and a=b / n / 3.

6. The method for improving the resolution of a cylindrical rotating display screen according to claim 1, characterized in that: When there is one light bar substrate (1), there are at least two light bars (2) on the light bar substrate (1); When there are at least two light bar substrates (1), there is at least one light bar (2) on the light bar substrate (1).

7. The method for improving the resolution of a cylindrical rotating display screen according to claim 1, characterized in that: A light bar protective sheath (9) is provided on the side of the light bar substrate (1) away from the protective film layer (8).

8. The method for improving the resolution of a cylindrical rotating display screen according to claim 1, characterized in that: The light bar substrate (1) is provided with a protective film layer (8) for covering the first light-emitting group (3).

9. The method for improving the resolution of a cylindrical rotating display screen according to claim 1, characterized in that: There are three light strips (2), the plurality of LED chips (4) on the first light strip (2) are all red chips (5), the LED chips (4) on the second light strip (2) are all green chips (6), and the LED chips (4) on the third light strip (2) are all blue chips (7).

10. The method for improving the resolution of a cylindrical rotating display screen according to claim 1, characterized in that: There are two light-emitting strips (2), and the plurality of LED chips (4) of each of the first light-emitting groups (3) include a red chip (5), a green chip (6), and a blue chip (7).

11. The method for improving the resolution of a cylindrical rotating display screen according to claim 1, characterized in that: The LED chip (4) is fixed on the light-emitting strip (2) by means of a COB process.

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