CN117174023B - Spherical LED screen and spherical LED screen with virtual pixels - Google Patents
Spherical LED screen and spherical LED screen with virtual pixels Download PDFInfo
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Abstract
A spherical LED screen and a spherical LED screen with virtual pixels belong to the technical field of LED display screens, and particularly relate to processing and manufacturing of an LED display light plate of the spherical LED screen; the problems that in a conventional spherical LED screen design method, when an LED display light plate is multiplexed into an upper hemisphere and a lower hemisphere, the positions of LED sub-pixels are reversed and the equator lines are provided with color joints are solved; in the spherical LED screen: the primary color arrangement sequence in each LED luminous component of the upper hemispherical LED display light plate is as follows: a first row, a first primary color; a second row, a second primary color; a third row, a third primary color; wherein the third row is adjacent to the equator; the primary color arrangement sequence in each LED luminous component of the LED display light plate of the lower hemisphere is as follows: a first row, a third primary color; a second row, a second primary color; a third row, a first primary color; wherein adjacent the equator is the third row. The invention is suitable for designing and manufacturing the spherical LED screen.
Description
Technical Field
The invention relates to the technical field of LED display screens, in particular to processing and manufacturing of an LED display light plate of a spherical LED screen.
Background
The spherical LED screen is a special-shaped LED screen, and the whole spherical shape of the spherical LED screen is formed by splicing a plurality of LED display unit plates (modules and light plates) with different sizes.
Since the spheres have symmetry (see fig. 1), the conventional sphere LED screen design method is generally as follows (see fig. 2):
firstly, dividing a warp, a weft and an equator on the spherical surface of a spherical LED screen, wherein the areas divided by the warp, the weft and the equator are used for paving an LED display unit board, and the equator divides the spherical surface into an upper hemisphere and a lower hemisphere;
then, aiming at the upper hemisphere, designing the LED display unit board in areas with different latitudes according to the areas divided by the warps and the wefts, and completing the design of the LED display unit board of the upper hemisphere of the spherical LED screen;
and finally, taking the equatorial line as a symmetry plane, horizontally rotating the upper hemisphere by 180 degrees, multiplexing the design of the upper hemisphere LED display unit plate into the design of the lower hemisphere LED display unit plate according to a symmetrical relation, and completing the overall design of the spherical LED screen.
In the process, the design of the upper hemispherical LED display unit board is multiplexed by utilizing the upper and lower spherical symmetrical relation, so that the purpose of reducing the design variety of the LED display unit board can be achieved.
Because the trapezoid LED display unit board is easy to manufacture, in the conventional spherical LED screen design method, the trapezoid LED display unit board is generally adopted as the LED display unit board for splicing the spherical LED screens.
The traditional trapezoid LED display unit board generally adopts an LED lamp bead of an SMD as a light-emitting component (LED pixel); the pixel point positions on the trapezoid LED display unit board are fixed, so that the distribution positions of LED light emitting chips (LED sub-pixels) of three primary colors of red, green and blue forming the pixel point are also fixed. If such a trapezoidal LED display unit board is adopted as the LED display unit board constituting the spherical LED screen in the above-described conventional spherical LED screen design method, the following problems occur:
firstly, in the conventional spherical LED screen design method, the trapezoid LED display unit board of the upper hemisphere is multiplexed into the trapezoid LED display unit board of the lower hemisphere after rotating along the equatorial plane, and at this time, the positions of the red and blue LED light emitting chips are reversed when the red, green and blue LED light emitting chips which are originally longitudinally arranged in the upper hemisphere are mapped to the lower hemisphere (see fig. 3 and fig. 4), wherein the direction from the upper hemisphere to the lower hemisphere is taken as the longitudinal direction;
secondly, blue LED luminous chips are oppositely distributed on the upper side and the lower side of the equatorial line, and after the spherical LED screen is lightened, the spherical LED screen is visually displayed as a colorful splicing gap (see fig. 4).
Disclosure of Invention
The invention provides a spherical LED screen and a spherical LED screen with virtual pixels, which solve the problems that in a conventional spherical LED screen design method, when an LED display light plate is multiplexed on an upper hemisphere and a lower hemisphere, the positions of LED sub-pixels are reversed and an equatorial line has color seam.
The invention relates to a spherical LED screen, which has the following technical scheme:
the spherical LED screen is formed by splicing a plurality of LED display light plates into a spherical surface; the spherical surface is divided into an upper hemisphere and a lower hemisphere by an equator line into two symmetrical hemispheres;
each LED display light plate consists of a driving circuit and a plurality of LED luminous components; each driving circuit comprises a common cathode LED display driving circuit; the LED luminous components are fixedly arranged on the common cathode LED display driving circuit by adopting a die bonding process; the common cathode LED display driving circuit is used for driving a plurality of LED luminous components on an LED display light plate to display;
the LED display light plates positioned on the upper hemisphere and the LED display light plates positioned on the lower hemisphere are arranged in a mirror symmetry mode relative to the equator line;
each LED luminous component consists of three inverted LED luminous chips with different primary colors which are longitudinally arranged;
the primary colors of the three flip-chip LED light emitting chips in each LED light emitting component of the two LED display light plates which are mirror symmetrical along the equator line are arranged as follows:
the primary color arrangement sequence in each LED luminous component of the upper hemispherical LED display light plate is as follows: a first row, a first primary color; a second row, a second primary color; a third row, a third primary color; wherein the third row is adjacent to the equator;
the primary color arrangement sequence in each LED luminous component of the LED display light plate of the lower hemisphere is as follows: a first row, a third primary color; a second row, a second primary color; a third row, a first primary color; wherein adjacent the equator is the third row.
Further, there is provided a preferred embodiment, wherein 3 driving power sources are provided in the common cathode LED display driving circuit corresponding to each LED light emitting part; the 3 driving power supplies are respectively a first power supply selection power supply, a second power supply VCC2 and a second power supply selection power supply;
in each LED lighting component:
the first power supply selection power supply is used for providing a first driving voltage or a second driving voltage for the flip LED light emitting chips arranged in the first row;
the second power supply VCC2 is configured to provide a second driving voltage for the flip-chip LED light emitting chips arranged in the second row;
the second power supply selection power supply is used for providing a second driving voltage or a first driving voltage for the flip LED light emitting chips arranged in the third row.
Further, a preferred embodiment is provided, wherein the first power supply selection power supply includes a first resistor R1, a second resistor R2, a first power supply VCC1, and a second power supply VCC2;
the first power supply VCC1 is connected with the first resistor R1 in series to form a first voltage supply branch; the first voltage supply branch circuit is used for providing a first driving voltage;
the second power supply VCC2 is connected with a second resistor R2 in series to form a second voltage supply branch; the second voltage supply branch is used for providing a second driving voltage;
the first power supply selection power supply is used for providing a first driving voltage or a second driving voltage for the flip-chip LED light emitting chips arranged in the first row in each LED light emitting component according to the arrangement of the first resistor R1 and the second resistor R2.
The second power supply selection power supply comprises a third resistor R3, a fourth resistor R4, a first power supply VCC1 and a second power supply VCC2;
the first power supply VCC1 and the third resistor R3 are connected in series to form a third voltage supply branch; the third voltage supply branch is used for providing a first driving voltage;
the second power supply VCC2 and the fourth resistor R4 are connected in series to form a fourth voltage supply branch; the fourth voltage supply branch is used for providing a second driving voltage;
the second power supply selection power supply is used for providing a first driving voltage or a second driving voltage for the flip-chip LED light emitting chips arranged in the third row in each LED light emitting component according to the arrangement of the third resistor R3 and the fourth resistor R4.
Further, there is provided a preferred embodiment for the upper hemisphere of the two LED display panels mirror symmetric along the equator:
the first power supply selection power supply is used for providing a first driving voltage for the flip LED light emitting chips arranged in the first row in each LED light emitting component;
the second power supply selection power supply is used for providing a second driving voltage for the flip LED light emitting chips arranged in the third row in each LED light emitting component;
for the lower hemisphere of the two LED display panels that are mirror symmetric along the equator line:
the first power supply selection power supply is used for providing a second driving voltage for the flip LED light emitting chips arranged in the first row in each LED light emitting component;
the second power supply selection power supply is used for providing a first driving voltage for the flip LED light emitting chips arranged in the third row in each LED light emitting component.
Further, there is provided a preferred embodiment for the upper hemisphere of the two LED display panels mirror symmetric along the equator:
the resistance value of the first resistor R1 is 0 ohm;
the second resistor R2 is empty;
the third resistor R3 is empty;
the resistance value of the fourth resistor R4 is 0 ohm;
for the lower hemisphere of the two LED display panels that are mirror symmetric along the equator line:
the first resistor R1 is empty;
the resistance value of the second resistor R2 is 0 ohm;
the resistance value of the third resistor R3 is 0 ohm;
the fourth resistor R4 is empty.
Further, a preferred embodiment is provided, wherein the driving circuit further comprises a memory chip; the storage chip stores an FPGA program and display parameter configuration;
the FPGA program and the display parameters are configured to control the display of the flip LED light emitting chips with three different primary colors in each LED light emitting component;
the display parameter configuration comprises RGB data channel parameters and current gain parameters;
the RGB data channel parameters are used for adjusting the gray scale of the flip LED light-emitting chip;
and the current gain parameter is used for adjusting the brightness of the flip LED light-emitting chip.
Further, a preferred embodiment is provided, wherein the LED display light panel is a trapezoidal LED display light panel.
Further, there is provided a preferred embodiment wherein said first primary color is a red primary color; the second primary color is a green primary color; the third primary color is a blue primary color.
The invention also provides a spherical LED screen with virtual pixels, which has the following technical scheme:
the spherical LED screen with the virtual pixels is formed by splicing a plurality of LED display light plates into a spherical surface; the spherical surface is divided into an upper hemisphere and a lower hemisphere by an equator line into two symmetrical hemispheres;
the LED display light plates positioned on the upper hemisphere and the LED display light plates positioned on the lower hemisphere are arranged in a mirror symmetry mode relative to the equator line;
one side of each LED display light plate is fixed with a plurality of LED luminous components;
each LED luminous component consists of four different primary color flip LED luminous chips arranged in an array; the four different primary colors are respectively a red primary color, a blue primary color, a real green primary color and a virtual green primary color;
the primary colors of the four flip-chip LED light emitting chips in each LED light emitting component of the two LED display light plates which are mirror symmetrical along the equator line are arranged as follows:
the primary color arrangement sequence in each LED luminous component of the upper hemispherical LED display light plate is as follows: a first row and a first column, red primary; a first row and a second column, virtual green primary; a second row and a first column, real pixels green primary; a second row and a second column, blue primary; wherein the third row is adjacent to the equator;
the primary color arrangement sequence in each LED luminous component of the LED display light plate of the lower hemisphere is as follows: a first row and a first column, blue primary; a first row and a second column, real pixels green primary; a second row and a first column, virtual green primary; a second row and a second column, red primary; wherein adjacent the equator is the third row.
The invention has the following beneficial effects:
according to the spherical LED screen, the LED display light plate with the flip LED light emitting chip (Micro/Mini LED chip) is adopted, so that the design types of the LED display light plate in the spherical LED screen are reduced, the problems that the positions of the LED sub-pixels are reversed and the equator lines are colored and spliced when the LED display light plate is reused in the upper hemisphere and the lower hemisphere are solved, and the full-screen red, green and blue LED sub-pixels are identical in arrangement and have no image deviation in display are realized.
The spherical LED screen and the spherical LED screen with the virtual pixels are suitable for designing and manufacturing the spherical LED screen.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of spherical symmetry of a spherical LED screen in one embodiment of the invention;
FIG. 2 is a schematic diagram of a symmetrical relationship between upper and lower hemispheric LED display light panels in a conventional spherical LED screen according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an LED display panel and LED pixels and LED sub-pixels on the LED display panel in a conventional spherical LED screen according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an arrangement of three primary colors in a conventional spherical LED screen according to an embodiment of the present invention; taking the direction from the upper hemisphere to the lower hemisphere as the longitudinal direction, the arrangement sequence of three primary colors in each LED pixel of the upper hemisphere is as follows: the longitudinal first acts as a red primary, the longitudinal second acts as a green primary, and the longitudinal third acts as a blue primary; the arrangement sequence of three primary colors in each LED pixel of the lower hemisphere is as follows: the vertical first row is a blue primary color, the vertical second row is a green primary color, and the vertical third row is a red primary color; color gaps can occur when the LED sub-pixel closest to the equator in the upper hemisphere and the LED sub-pixel closest to the equator in the lower hemisphere are both the LED sub-pixels of the primary color blue;
FIG. 5 is a schematic diagram of a common cathode LED display driving circuit according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an arrangement of three primary colors in each LED lighting component of two LED display panels mirror-symmetrical about an equatorial line in one embodiment of the invention; the LED display light plate of the upper hemisphere and the LED display light plate of the lower hemisphere are in mirror symmetry along an equatorial line; taking the direction from the upper hemisphere to the lower hemisphere as the longitudinal direction, the arrangement sequence of three primary colors in each LED luminous component of the upper hemisphere is as follows: the longitudinal first behavior is a first primary color, the longitudinal second behavior is a second primary color, and the longitudinal third behavior is a third primary color; the arrangement sequence of the three primary colors in each LED luminous component of the lower hemisphere is as follows: the longitudinal first behavior is a first primary color, the longitudinal second behavior is a second primary color, and the longitudinal third behavior is a third primary color; the flip-chip LED light-emitting chip closest to the equator line in the upper hemisphere and the flip-chip LED light-emitting chip closest to the equator line in the lower hemisphere are the flip-chip LED light-emitting chips of the third primary color, and no color gap exists;
FIG. 7 is a schematic diagram of a common cathode LED display driver circuit for a hemispherical LED display panel in two LED display panels mirror symmetric about the equator in one embodiment of the present invention; the first resistor R1 and the first resistor R4 are empty, and the resistance values of the second resistor R2 and the third resistor R3 are 0 ohm;
FIG. 8 is a schematic diagram of a common cathode LED display driver circuit for a hemispherical LED display panel in two LED display panels mirror symmetric about the equator in one embodiment of the present invention; the second resistor R2 and the third resistor R3 are empty, and the resistance value of the first resistor R1 and the fourth resistor R4 is 0 ohm;
FIG. 9 is a schematic diagram showing a parameter configuration in an embodiment of the present invention;
FIG. 10 is a schematic diagram of a primary color arrangement of a flip LED light emitting chip with a spherical LED screen with virtual pixels in an embodiment of the present invention;
description of the drawings:
101. an equator line; 102. an upper hemisphere; 103. a lower hemisphere; 201. an LED display light plate; 301. a first power supply selection power supply; 302. a second power supply selection power supply; 401. an LED pixel; 402. an LED sub-pixel; 501. an LED light emitting member; 502. flip-chip LED light emitting chip; 601. a red primary color; 602. a blue primary color; 603. a solid green primary color; 604. virtual green primary.
Detailed Description
In order to make the technical scheme and the advantages of the present invention more clear, the following detailed description of the specific embodiments of the present invention will be further described in detail with reference to the accompanying drawings. The various embodiments described below are only a few, but not all, of the preferred embodiments of the present invention; the various embodiments described below are intended to be illustrative of the invention and should not be construed as limiting the invention; reasonable combinations of technical features defined by the various embodiments of the present invention, and all other embodiments that can be obtained by one of ordinary skill in the art without making inventive efforts based on the embodiments of the present invention, are within the scope of protection of the present invention.
In a first embodiment, the present embodiment is described with reference to fig. 1 to 9, and the present embodiment provides a spherical LED screen, which is specifically implemented as follows:
the spherical LED screen is formed by splicing a plurality of LED display light plates into a spherical surface; the spherical surface is divided into an upper hemisphere and a lower hemisphere by an equator line into two symmetrical hemispheres;
each LED display light plate consists of a driving circuit and a plurality of LED luminous components; each driving circuit comprises a common cathode LED display driving circuit; the LED luminous components are fixedly arranged on the common cathode LED display driving circuit by adopting a die bonding process; the common cathode LED display driving circuit is used for driving a plurality of LED luminous components on an LED display light plate to display;
the LED display light plates positioned on the upper hemisphere and the LED display light plates positioned on the lower hemisphere are arranged in a mirror symmetry mode relative to the equator line;
each LED luminous component consists of three inverted LED luminous chips with different primary colors which are longitudinally arranged;
the primary colors of the three flip-chip LED light emitting chips in each LED light emitting component of the two LED display light plates which are mirror symmetrical along the equator line are arranged as follows:
the primary color arrangement sequence in each LED luminous component of the upper hemispherical LED display light plate is as follows: a first row, a first primary color; a second row, a second primary color; a third row, a third primary color; wherein the third row is adjacent to the equator;
the primary color arrangement sequence in each LED luminous component of the LED display light plate of the lower hemisphere is as follows: a first row, a third primary color; a second row, a second primary color; a third row, a first primary color; wherein adjacent the equator is the third row.
In this embodiment, the three flip LED light emitting chips in each LED light emitting device are respectively a flip LED light emitting chip of the first primary color, a flip LED light emitting chip of the second primary color, and a flip LED light emitting chip of the third primary color.
In this embodiment, two LED display light panels mirror-symmetrical along the equator line employ flip-chip LED light emitting chips of the same size.
In this embodiment, compared with the conventional LED display light panel, the primary color arrangement sequence of the flip LED light emitting chips in the lower hemispherical LED display light panel is adjusted.
The direction of the upper hemisphere pointing to the lower hemisphere is the longitudinal direction:
seen from the longitudinal direction, the primary colors of the three flip-chip LED light emitting chips in each LED light emitting component of the upper hemisphere are arranged as follows:
the first longitudinal direction is a first primary color; longitudinal second behavior second primary color; longitudinal third behavior third primary color;
seen from the longitudinal direction, the primary colors of the three flip-chip LED light emitting chips in each LED light emitting component of the lower hemisphere are arranged as follows:
the first longitudinal direction is a first primary color; longitudinal second behavior second primary color; longitudinal third behavior third primary color;
it can be seen that there is no problem of sub-pixel inversion (i.e. primary color inversion) as seen in the longitudinal direction;
meanwhile, one row of flip LED light emitting chips closest to the equator line in the upper hemisphere is a blue primary color flip LED light emitting chip, one row of flip LED light emitting chips closest to the equator line in the lower hemisphere is a third primary color flip LED light emitting chip, and two rows of flip LED light emitting chips with the same primary color cannot appear near the equator line, namely color gaps cannot appear.
In this embodiment, the flip LED light emitting chip is mounted on the common cathode LED display driving circuit by a die bonding process; the common cathode LED display driving circuit is provided with a plurality of light-emitting chip die bonding pads, each light-emitting chip die bonding pad corresponds to one flip LED light-emitting chip one by one, the flip LED light-emitting chip is die bonded on the light-emitting chip die bonding pad, and the flip LED light-emitting chip is electrically connected with the light-emitting chip die bonding pad.
For two LED display panels mirror symmetric along the equator:
the die bonding procedure adopted by the LED display light plates of the upper hemisphere and the lower hemisphere and the coordinate file of the flip LED light-emitting chip are the same, and only in the transfer bonding process of the flip LED light-emitting chip, the blue film of the flip LED light-emitting chip of the first primary color and the blue film of the flip LED light-emitting chip of the third primary color are exchanged:
assuming that in the upper hemisphere of the LED display panel, the flip-chip LED light emitting chip is as follows: the first behavior is the position bonding of the flip-chip LED light-emitting chip of the first primary color, the second behavior is the flip-chip LED light-emitting chip of the second primary color and the third behavior is the flip-chip LED light-emitting chip of the third primary color;
the bonding positions of the flip LED light emitting chips in the corresponding lower hemispheres can be obtained by only exchanging the bonding positions of the flip LED light emitting chips in the first primary color with the bonding positions of the flip LED light emitting chips in the third primary color.
The LED display light plates of the upper hemisphere and the lower hemisphere adopt luminous chip die bonding pads with the same size.
In a second embodiment, this embodiment is described with reference to fig. 1 to 9, and the embodiment is further limited to the spherical LED screen described in the first embodiment, and specific implementation contents are as follows:
3 driving power supplies are arranged in the common cathode LED display driving circuit corresponding to each LED luminous component; the 3 driving power supplies are respectively a first power supply selection power supply, a second power supply VCC2 and a second power supply selection power supply;
in each LED lighting component:
the first power supply selection power supply is used for providing a first driving voltage or a second driving voltage for the flip LED light emitting chips arranged in the first row;
the second power supply VCC2 is configured to provide a second driving voltage for the flip-chip LED light emitting chips arranged in the second row;
the second power supply selection power supply is used for providing a second driving voltage or a first driving voltage for the flip LED light emitting chips arranged in the third row.
In the third embodiment, the present embodiment is further limited to the spherical LED panel described in the second embodiment, and the specific implementation contents are as follows:
the first power supply selection power supply comprises a first resistor R1, a second resistor R2, a first power supply VCC1 and a second power supply VCC2;
the first power supply VCC1 is connected with the first resistor R1 in series to form a first voltage supply branch; the first voltage supply branch circuit is used for providing a first driving voltage;
the second power supply VCC2 is connected with a second resistor R2 in series to form a second voltage supply branch; the second voltage supply branch is used for providing a second driving voltage;
the first power supply selection power supply is used for providing a first driving voltage or a second driving voltage for the flip-chip LED light emitting chips arranged in the first row in each LED light emitting component according to the arrangement of the first resistor R1 and the second resistor R2.
The second power supply selection power supply comprises a third resistor R3, a fourth resistor R4, a first power supply VCC1 and a second power supply VCC2;
the first power supply VCC1 and the third resistor R3 are connected in series to form a third voltage supply branch; the third voltage supply branch is used for providing a first driving voltage;
the second power supply VCC2 and the fourth resistor R4 are connected in series to form a fourth voltage supply branch; the fourth voltage supply branch is used for providing a second driving voltage;
the second power supply selection power supply is used for providing a first driving voltage or a second driving voltage for the flip-chip LED light emitting chips arranged in the third row in each LED light emitting component according to the arrangement of the third resistor R3 and the fourth resistor R4.
A fourth embodiment is described with reference to fig. 1 to 9, and the third embodiment is further limited to a spherical LED screen, and specific implementation contents are as follows:
for the upper hemisphere of the two LED display panels that are mirror symmetric along the equator line:
the first power supply selection power supply is used for providing a first driving voltage for the flip LED light emitting chips arranged in the first row in each LED light emitting component;
the second power supply selection power supply is used for providing a second driving voltage for the flip LED light emitting chips arranged in the third row in each LED light emitting component;
for the lower hemisphere of the two LED display panels that are mirror symmetric along the equator line:
the first power supply selection power supply is used for providing a second driving voltage for the flip LED light emitting chips arranged in the first row in each LED light emitting component;
the second power supply selection power supply is used for providing a first driving voltage for the flip LED light emitting chips arranged in the third row in each LED light emitting component.
In a fifth embodiment, the present embodiment is further limited to the spherical LED panel described in the fourth embodiment, and the specific implementation contents are as follows:
for the upper hemisphere of the two LED display panels that are mirror symmetric along the equator line:
the resistance value of the first resistor R1 is 0 ohm;
the second resistor R2 is empty;
the third resistor R3 is empty;
the resistance value of the fourth resistor R4 is 0 ohm;
for the lower hemisphere of the two LED display panels that are mirror symmetric along the equator line:
the first resistor R1 is empty;
the resistance value of the second resistor R2 is 0 ohm;
the resistance value of the third resistor R3 is 0 ohm;
the fourth resistor R4 is empty.
In this embodiment, the common cathode LED display driving circuit includes a plurality of power driving chips, and each power driving chip corresponds to one row of flip LED light emitting chips.
The power driving chip is provided with a driving power input end and a driving signal transmitting end, wherein the driving power input end is used for receiving a first driving voltage or a second driving voltage, and the driving signal transmitting end is used for distributing the first driving voltage or the second driving voltage to the flip LED light emitting chips corresponding to one row.
More specifically:
flip-chip LED light emitting chips arranged in a first row in each LED light emitting section:
the first power supply VCC1 is connected with one end of a first resistor R1, the other end of the first resistor R1 is connected with a driving power supply input end of a power supply driving chip, and a driving signal transmitting end of the power supply driving chip is connected with a power supply input end of a flip LED light emitting chip arranged in the first row in each LED light emitting component;
the second power supply VCC2 is connected with one end of a second resistor R2, the other end of the second resistor R2 is connected with a driving power supply input end of a power supply driving chip, and a driving signal transmitting end of the power supply driving chip is connected with a power supply input end of the flip LED light emitting chips arranged in the first row in each LED light emitting component;
flip-chip LED light emitting chips arranged in a third row in each LED light emitting section:
the first power supply VCC1 is connected with one end of a third resistor R3, the other end of the third resistor R3 is connected with a driving power supply input end of a power supply driving chip, and a driving signal transmitting end of the power supply driving chip is connected with a power supply input end of a flip LED light emitting chip arranged in a third row in each LED light emitting component;
the second power supply VCC2 is connected with one end of a fourth resistor R4, the other end of the fourth resistor R4 is connected with a driving power supply input end of a power supply driving chip, and a driving signal transmitting end of the power supply driving chip is connected with a power supply input end of a flip LED light emitting chip arranged in a third row in each LED light emitting component.
In this embodiment, the common cathode LED display driving circuits used for the two LED display panels mirror-symmetrical along the equator line are substantially the same, and the main difference is that the arrangement of the resistors on the first power supply selection power supply and the second power supply selection power supply is different. By adopting the mode, most circuits in the common cathode LED display driving circuit are commonly used, different resistances can be set according to actual conditions before flip LED chips are fixed on the crystal, so that the required upper hemispherical LED display light plate or lower hemispherical LED display light plate is obtained, the processing and manufacturing flow of two LED display light plates which are mirror symmetrical along the equatorial line is simplified, and the LED display light plates are easier to manufacture in batches.
It should be noted that, the voltages required by the flip-chip LED light emitting chips of different primary colors are different, that is, the power supplies of the flip-chip LED light emitting chips of different primary colors are different; meanwhile, before the flip LED light emitting chips are fixed to the common cathode LED display driving circuit, the specific flip LED light emitting chips of which primary colors are fixed by the crystal fixing bonding pads of each light emitting chip are uncertain, namely driving power supplies connected with the flip LED light emitting chips of each primary color are not fixed, after the common cathode LED display driving circuit is produced by the traditional processing method, the connection relation between each driving power supply and the flip LED light emitting chips of each primary color is fixed, and then the common cathode LED display driving circuit can only remove the crystal fixing flip LED light emitting chips according to the primary color arrangement sequence of an upper hemisphere or a lower hemisphere; in the practical process, the embodiment is adopted to make most circuits of the common cathode LED display driving circuit, the resistors of the first power supply selection power supply and the second power supply selection power supply are left after being manufactured and are not welded to be used as semi-finished products of the common cathode LED display driving circuit, the semi-finished products are manufactured in a large scale, and then the corresponding resistors are flexibly selected and welded according to specific conditions, so that the common cathode LED display driving circuit of an upper hemisphere or a lower hemisphere is obtained, and the resistance welding is easy to change if wrong in the process.
In a sixth embodiment, the present embodiment is further limited to the spherical LED panel described in the fourth embodiment, and the specific implementation contents are as follows:
the driving circuit also comprises a storage chip; the storage chip stores an FPGA program and display parameter configuration;
the FPGA program and the display parameters are configured to control the display of the flip LED light emitting chips with three different primary colors in each LED light emitting component;
the display parameter configuration comprises RGB data channel parameters and current gain parameters;
the RGB data channel parameters are used for adjusting the gray scale of the flip LED light-emitting chip;
and the current gain parameter is used for adjusting the brightness of the flip LED light-emitting chip.
In this embodiment, the storage chip is configured to send an FPGA program and a display parameter configuration to the common cathode LED display driving circuit, and the common cathode LED display driving circuit is configured to adjust display of the flip LED light emitting chip according to the FPGA program and the display parameter configuration.
In this embodiment, the storage chip stores a FLASH storage file; the FLASH storage file comprises an FPGA program, display parameter configuration, a Gamma table and a correction coefficient table.
The FLASH storage file is used for being called by the FPGA chip; and the FPGA chip is used for controlling the display of the flip LED light-emitting chips with three different primary colors in each LED light-emitting component according to the FLASH storage file.
For two LED display light plates which are mirror symmetrical along the equator, the common cathode LED display driving circuit is basically the same except for the primary color arrangement sequence of the flip LED light emitting chips and the specific arrangement of the driving power supply, so that the two LED display light plates can adopt the same FPGA program, gamma table and correction coefficient table, and the configuration of display parameters is only slightly different; the control program of the common cathode LED display driving circuit is easy to configure, is simple and convenient to operate, and can ensure that the LED display light plates of the upper hemisphere and the lower hemisphere have the same display effect.
Since the primary color arrangement of the three flip-chip LED light emitting chips in each LED light emitting part of the two LED display light panels mirror-symmetrical along the equator line is not the same, the RGB data channel parameters and the current gain parameters in the display parameter configuration for the LED display light panels of the upper hemisphere and the lower hemisphere need to be configured separately.
If the RGB data channel parameters and the current gain parameters of the LED display light panel provided to the upper hemisphere have been configured, the configuration of the LED display light panel of the lower hemisphere can be easily obtained according to the configuration of the LED display light panel of the upper hemisphere, specifically, according to the positional relationship of the flip LED light emitting chips in the LED display light panels of the upper hemisphere and the lower hemisphere:
for RGB data channel parameters, only the control signals for controlling the gray scale of the flip LED light emitting chip of the first primary color and the control signals for controlling the gray scale of the flip LED light emitting chip of the third primary color in the configured RGB data channel parameters of the upper hemispherical LED display light plate are required to be exchanged;
similarly, for the current gain parameters, only the control signals for controlling the brightness of the flip-chip LED light emitting chip of the first primary color and the flip-chip LED light emitting chip of the third primary color in the configured current gain parameters of the LED display light plate of the upper hemisphere are required to be exchanged.
In this embodiment, the display parameter configuration further includes configuration items such as a driver IC register, gclk Sclk, OE LAT, and blanking time.
Embodiment seven, the present embodiment is described with reference to fig. 1 to 9, and the present embodiment is further limited to the spherical LED screen described in the first embodiment, and specific implementation contents are as follows:
the LED display light plate is a trapezoid LED display light plate.
An eighth embodiment is described with reference to fig. 1 to 9, and the embodiment is further limited to the spherical LED screen according to the first embodiment, and specifically implemented as follows:
the first primary color is a red primary color; the second primary color is a green primary color; the third primary color is a blue primary color.
In a ninth embodiment, referring to fig. 10, the present embodiment provides a spherical LED panel with virtual pixels, which is specifically implemented as follows:
the spherical LED screen with the virtual pixels is formed by splicing a plurality of LED display light plates into a spherical surface; the spherical surface is divided into an upper hemisphere and a lower hemisphere by an equator line into two symmetrical hemispheres;
the LED display light plates positioned on the upper hemisphere and the LED display light plates positioned on the lower hemisphere are arranged in a mirror symmetry mode relative to the equator line;
one side of each LED display light plate is fixed with a plurality of LED luminous components;
each LED luminous component consists of four different primary color flip LED luminous chips arranged in an array; the four different primary colors are respectively a red primary color, a blue primary color, a real green primary color and a virtual green primary color;
the primary colors of the four flip-chip LED light emitting chips in each LED light emitting component of the two LED display light plates which are mirror symmetrical along the equator line are arranged as follows:
the primary color arrangement sequence in each LED luminous component of the upper hemispherical LED display light plate is as follows: a first row and a first column, red primary; a first row and a second column, virtual green primary; a second row and a first column, real pixels green primary; a second row and a second column, blue primary; wherein the third row is adjacent to the equator;
the primary color arrangement sequence in each LED luminous component of the LED display light plate of the lower hemisphere is as follows: a first row and a first column, blue primary; a first row and a second column, real pixels green primary; a second row and a first column, virtual green primary; a second row and a second column, red primary; wherein adjacent the equator is the third row.
In this embodiment, as in the previous embodiment, the spherical LED screen with virtual pixels also includes a common cathode LED display driving circuit; and the flip LED light-emitting chip is fixedly crystal-mounted on the common cathode LED display driving circuit.
And the common cathode LED display driving circuit obtains the driving power supply of the flip LED light emitting chip of the two LED display light plates which are mirror symmetrical along the equator line by welding different resistors.
The common cathode LED display driving circuit is processed in the mode, most circuits in the common cathode LED display driving circuit can be shared, and then the upper hemispherical LED display light plate or the lower hemispherical LED display light plate is formed by welding according to actual conditions, so that the universality of the common cathode LED display driving circuit is enhanced, and the common cathode LED display driving circuit is convenient for mass production.
The technical solution provided by the present invention is described in further detail through several specific embodiments, so as to highlight the advantages and benefits of the technical solution provided by the present invention, however, the above specific embodiments are not intended to be limiting, and any reasonable modification and improvement, reasonable combination of embodiments, equivalent substitution, etc. of the present invention based on the spirit and principle of the present invention should be included in the scope of protection of the present invention.
Claims (9)
1. The spherical LED screen is characterized in that a plurality of LED display light plates are spliced into a spherical surface; the spherical surface is divided into an upper hemisphere and a lower hemisphere by an equator line into two symmetrical hemispheres;
each LED display light plate consists of a driving circuit and a plurality of LED luminous components; each driving circuit comprises a common cathode LED display driving circuit; the LED luminous components are fixedly arranged on the common cathode LED display driving circuit by adopting a die bonding process; the common cathode LED display driving circuit is used for driving a plurality of LED luminous components on an LED display light plate to display;
the LED display light plates positioned on the upper hemisphere and the LED display light plates positioned on the lower hemisphere are arranged in a mirror symmetry mode relative to the equator line;
each LED luminous component consists of three inverted LED luminous chips with different primary colors which are longitudinally arranged;
the primary colors of the three flip-chip LED light emitting chips in each LED light emitting component of the two LED display light plates which are mirror symmetrical along the equator line are arranged as follows:
the primary color arrangement sequence in each LED luminous component of the upper hemispherical LED display light plate is as follows: a first row, a first primary color; a second row, a second primary color; a third row, a third primary color; wherein the third row is adjacent to the equator;
the primary color arrangement sequence in each LED luminous component of the LED display light plate of the lower hemisphere is as follows: a first row, a third primary color; a second row, a second primary color; a third row, a first primary color; wherein adjacent the equator is the third row.
2. The spherical LED screen according to claim 1, wherein 3 driving power sources are provided in the common cathode LED display driving circuit corresponding to each LED light emitting part; the 3 driving power supplies are respectively a first power supply selection power supply, a second power supply (VCC 2) and a second power supply selection power supply;
in each LED lighting component:
the first power supply selection power supply is used for providing a first driving voltage or a second driving voltage for the flip LED light emitting chips arranged in the first row;
the second power supply (VCC 2) is used for providing a second driving voltage for the flip LED light emitting chips arranged in a second row;
the second power supply selection power supply is used for providing a second driving voltage or a first driving voltage for the flip LED light emitting chips arranged in the third row.
3. A spherical LED screen according to claim 2, wherein,
the first power supply selection power supply comprises a first resistor (R1), a second resistor (R2), a first power supply (VCC 1) and a second power supply (VCC 2);
the first power supply source (VCC 1) is connected with the first resistor (R1) in series to form a first voltage supply branch; the first voltage supply branch circuit is used for providing a first driving voltage;
the second power supply source (VCC 2) is connected with a second resistor (R2) in series to form a second voltage supply branch; the second voltage supply branch is used for providing a second driving voltage;
the first power supply selection power supply is used for providing a first driving voltage or a second driving voltage for the flip-chip LED light emitting chips arranged in the first row in each LED light emitting component according to the arrangement of the first resistor (R1) and the second resistor (R2);
the second power supply selection power supply comprises a third resistor (R3), a fourth resistor (R4), a first power supply (VCC 1) and a second power supply (VCC 2);
the first power supply source (VCC 1) and the third resistor (R3) are connected in series to form a third voltage supply branch; the third voltage supply branch is used for providing a first driving voltage;
the second power supply source (VCC 2) is connected with a fourth resistor (R4) in series to form a fourth voltage supply branch; the fourth voltage supply branch is used for providing a second driving voltage;
the second power supply selection power supply is used for providing a first driving voltage or a second driving voltage for the flip-chip LED light emitting chips arranged in the third row in each LED light emitting component according to the setting of the third resistor (R3) and the fourth resistor (R4).
4. A spherical LED screen according to claim 3, wherein,
for the upper hemisphere of the two LED display panels that are mirror symmetric along the equator line:
the first power supply selection power supply is used for providing a first driving voltage for the flip LED light emitting chips arranged in the first row in each LED light emitting component;
the second power supply selection power supply is used for providing a second driving voltage for the flip LED light emitting chips arranged in the third row in each LED light emitting component;
for the lower hemisphere of the two LED display panels that are mirror symmetric along the equator line:
the first power supply selection power supply is used for providing a second driving voltage for the flip LED light emitting chips arranged in the first row in each LED light emitting component;
the second power supply selection power supply is used for providing a first driving voltage for the flip LED light emitting chips arranged in the third row in each LED light emitting component.
5. A spherical LED screen according to claim 4, wherein,
for the upper hemisphere of the two LED display panels that are mirror symmetric along the equator line:
the resistance value of the first resistor (R1) is 0 ohm;
-said second resistor (R2) is left empty;
-said third resistor (R3) is left empty;
the resistance value of the fourth resistor (R4) is 0 ohm;
for the lower hemisphere of the two LED display panels that are mirror symmetric along the equator line:
-said first resistor (R1) is empty;
the second resistor (R2) has a resistance value of 0 ohm;
the resistance value of the third resistor (R3) is 0 ohm;
the fourth resistor (R4) is empty.
6. The spherical LED screen of claim 4, wherein said drive circuit further comprises a memory chip; the storage chip stores an FPGA program and display parameter configuration;
the FPGA program and the display parameters are configured to control the display of the flip LED light emitting chips with three different primary colors in each LED light emitting component;
the display parameter configuration comprises RGB data channel parameters and current gain parameters;
the RGB data channel parameters are used for adjusting the gray scale of the flip LED light-emitting chip;
and the current gain parameter is used for adjusting the brightness of the flip LED light-emitting chip.
7. The spherical LED screen of claim 1, wherein said LED display panel is a trapezoidal LED display panel.
8. The LED screen of claim 1, wherein said first primary color is a red primary color; the second primary color is a green primary color; the third primary color is a blue primary color.
9. The spherical LED screen with the virtual pixels is characterized in that the spherical LED screen with the virtual pixels is formed by splicing a plurality of LED display light plates into a spherical surface; the spherical surface is divided into an upper hemisphere and a lower hemisphere by an equator line into two symmetrical hemispheres;
the LED display light plates positioned on the upper hemisphere and the LED display light plates positioned on the lower hemisphere are arranged in a mirror symmetry mode relative to the equator line;
one side of each LED display light plate is fixed with a plurality of LED luminous components;
each LED luminous component consists of four different primary color flip LED luminous chips arranged in an array; the four different primary colors are respectively a red primary color, a blue primary color, a real green primary color and a virtual green primary color;
the primary colors of the four flip-chip LED light emitting chips in each LED light emitting component of the two LED display light plates which are mirror symmetrical along the equator line are arranged as follows:
the primary color arrangement sequence in each LED luminous component of the upper hemispherical LED display light plate is as follows: a first row and a first column, red primary; a first row and a second column, virtual green primary; a second row and a first column, real pixels green primary; a second row and a second column, blue primary; wherein the third row is adjacent to the equator;
the primary color arrangement sequence in each LED luminous component of the LED display light plate of the lower hemisphere is as follows: a first row and a first column, blue primary; a first row and a second column, real pixels green primary; a second row and a first column, virtual green primary; a second row and a second column, red primary; wherein adjacent the equator is the third row.
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