LED screen lamp bead address burning circuit
By using semiconductor photosensitive units and comparators in the LED screen lamp bead address burning circuit, and controlling the burning process with photo-sensing signals, the burning error problem caused by poor electrode contact is solved, and efficient and zero-error address burning is achieved.
Patent Information
- Application Number
- CN202421639620.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-07-11
AI Technical Summary
The existing LED screen lamp bead address burning method is prone to incorrect burning due to poor electrode contact, resulting in display defects or scrapping of the entire screen.
The semiconductor photosensitive unit is combined with the comparator and reference voltage module to control the lamp bead address burning circuit through the photo-sensing signal, avoiding the error of electrode contact and realizing efficient zero-error address burning.
It realizes efficient and zero-error address burning, avoids burning errors caused by poor contact, simplifies burning equipment, and ensures zero-error errors on the entire screen address burning.
Smart Images
Figure CN222774991U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field related to semiconductor photosensitive circuits, and in particular to an LED screen lamp bead address burning circuit. Background Art
[0002] The LED screen is realized by combining many individual lamp beads, each of which can emit red, green and blue lights. By adjusting the relative grayscale of these three lights, all colors of lights can be displayed, thereby achieving rich color display on the screen. In order to accurately display the details of the screen, it is necessary to adjust the grayscale of the red, green and blue lights of each lamp bead very accurately, so the address of each lamp bead must be burned very accurately. If the address of a lamp bead is burned incorrectly, the display of the entire screen will have obvious defects, resulting in the scrapping of the entire screen.
[0003] The address burning method in the prior art is to use electrode contact to achieve burning by adding voltage and current. However, due to the large number of lamp beads, this electrode contact method is prone to poor contact, which leads to failure of burning the address of a certain lamp bead, resulting in subsequent lamp bead address burning errors, causing the entire screen to be scrapped. Therefore, it is urgent to provide an LED screen lamp bead address burning circuit that can efficiently and error-free burn addresses and achieve zero error in address burning. Utility Model Content
[0004] The utility model provides an LED screen lamp bead address burning circuit, aiming to solve the above technical defects.
[0005] The specific technical solutions provided by the utility model are as follows:
[0006] The utility model provides an LED screen lamp bead address burning circuit, which includes a comparator, a semiconductor photosensitive unit and a detection switch connected to the positive input end of the comparator, and a reference voltage module connected to the negative input end of the comparator; the output end of the comparator is connected to the lamp bead address burning circuit.
[0007] Optionally, the semiconductor photosensing unit is a diode, and the output reference voltage of the reference voltage module is 0.01 mV to 600 mV.
[0008] Optionally, when the voltage generated by the current generated by the semiconductor photosensor unit under the irradiation of external light and charging the node capacitance at the positive input end of the comparator is greater than the output reference voltage of the reference voltage module, the output end of the comparator generates a control signal of "1" to the lamp bead address burning circuit.
[0009] Optionally, when the voltage generated by the current generated by the semiconductor photosensor unit under the irradiation of external light and charging the node capacitance at the positive input end of the comparator is less than the output reference voltage of the reference voltage module, the output end of the comparator generates a control signal of "0" to the lamp bead address burning circuit.
[0010] The utility model has the following beneficial technical effects:
[0011] The embodiment of the utility model provides an LED screen lamp bead address burning circuit including a comparator, a semiconductor photosensitive unit and a detection switch connected to the positive input end of the comparator, and a reference voltage module connected to the negative input end of the comparator. The output end of the comparator is connected to the lamp bead address burning circuit, thereby avoiding the burning error caused by poor contact in the probe-type burning method and achieving efficient and zero-error address burning. The use of a semiconductor photosensitive unit for burning greatly simplifies the burning equipment, and the address burning of the entire screen is achieved with zero error by coordinating the column-by-column address burning. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0013] Figure 1 The present invention is a schematic diagram of the structure of a LED screen lamp bead address burning circuit according to an embodiment of the present invention. DETAILED DESCRIPTION
[0014] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0015] The following will be combined Figure 1 A LED screen lamp bead address burning circuit according to an embodiment of the utility model is described in detail.
[0016] refer to Figure 1As shown, an LED screen lamp bead address burning circuit provided by an embodiment of the utility model includes a comparator 1, a semiconductor photosensitive unit 2 and a detection switch 3 connected to the positive input terminal of the comparator 1, and a reference voltage module 4 connected to the negative input terminal of the comparator 1, and the output terminal of the comparator 1 is connected to the lamp bead address burning circuit 5. The detection switch 3 is in a closed state before the detection starts to realize the voltage reset of the semiconductor photosensitive unit. During the detection process, the detection switch 3 is always in an open state. The semiconductor photosensitive unit 2 is a diode, and the output reference voltage of the reference voltage module is 0.01 mV to 600 mV. When the voltage generated by the current generated by the semiconductor photosensitive unit under the irradiation of external light after charging the node capacitance of the positive input terminal of the comparator is greater than the output reference voltage of the reference voltage module, the output terminal of the comparator generates a control signal of "1" to the lamp bead address burning circuit. When the voltage generated by the current generated by the semiconductor photosensor under the irradiation of external light and charging the node capacitor at the positive input end of the comparator is less than the output reference voltage of the reference voltage module, the output end of the comparator generates a control signal of "0" to the lamp bead address burning circuit.
[0017] Each lamp bead has a separate address bit, and each lamp bead can be assigned a separate address bit by burning the fuse; the traditional method is to directly burn the fuse by adding voltage and current through electrode contact, but this method has the disadvantage of poor electrode contact, which leads to errors in the address burning of individual lamp beads. The embodiment of the utility model can avoid the disadvantage of electrode contact by sensing the external light source through the semiconductor photosensitive unit, thereby achieving efficient and error-free address burning.
[0018] In the embodiment of the utility model, when the semiconductor photosensitive unit is exposed for a period of time of 10 microseconds to 10 milliseconds, a voltage value will be output, and this voltage value will be compared with a reference voltage of 0-600 millivolts through a voltage comparator. If this voltage value is higher than the reference voltage, a logic "1" is output. This logic controls the fuse of the lamp bead chip to be blown, so that the address of this lamp bead is burned. In order to achieve zero-error address burning, the matrix of the lamp beads is controlled, and only one column is burned at a time. After one column is burned successfully, the next column is burned, and the burning is performed column by column until the address of the entire matrix is burned.
[0019] The embodiment of the utility model provides an LED screen lamp bead address burning circuit including a comparator, a semiconductor photosensitive unit and a detection switch connected to the positive input end of the comparator, and a reference voltage module connected to the negative input end of the comparator. The output end of the comparator is connected to the lamp bead address burning circuit, thereby avoiding the burning error caused by poor contact in the probe-type burning method and achieving efficient and zero-error address burning. The use of a semiconductor photosensitive unit for burning greatly simplifies the burning equipment, and the address burning of the entire screen is achieved with zero error by coordinating the column-by-column address burning.
[0020] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if these modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
Claims
1. A LED screen lamp bead address burning circuit, characterized in that: The LED screen lamp bead address burning circuit includes a comparator, a semiconductor photosensor unit and a detection switch connected to the positive input end of the comparator, and a reference voltage module connected to the negative input end of the comparator. The output end of the comparator is connected to the lamp bead address burning circuit.
2. The LED screen lamp bead address burning circuit according to claim 1 is characterized in that: The semiconductor photosensing unit is a diode, and the output reference voltage of the reference voltage module is 0.01 mV to 600 mV.
3. The LED screen lamp bead address burning circuit according to claim 2 is characterized in that: When the voltage generated by the current generated by the semiconductor photosensor under the irradiation of external light and charging the node capacitance at the positive input end of the comparator is greater than the output reference voltage of the reference voltage module, the output end of the comparator generates a control signal of "1" to the lamp bead address burning circuit.
4. The LED screen lamp bead address burning circuit according to claim 2 is characterized in that: When the voltage generated by the current generated by the semiconductor photosensor under the irradiation of external light and charging the node capacitor at the positive input end of the comparator is less than the output reference voltage of the reference voltage module, the output end of the comparator generates a control signal of "0" to the lamp bead address burning circuit.