Smart blackboard with LED display technology

Abstract

The present invention relates to the field of LED technology, and specifically to a smart blackboard using LED display technology, including a backlight total layer, wherein the backlight total layer includes a quantum dot film layer, a diffusion layer, a light guide layer, and an LED dot matrix arranged in sequence, a metal grid layer is arranged outside the quantum dot film layer, the metal grid layer is electrically connected to a touch coordinate adjustment circuit, and the LED dot matrix is ​​electrically connected to an LED dot matrix control circuit, the touch coordinate adjustment circuit is used to make a single contact area of ​​the metal grid layer correspond to a single LED area of ​​the LED dot matrix; the touch coordinate adjustment circuit is also used to make multiple contact areas of the metal grid layer correspond to a single LED area of ​​the LED dot matrix; the touch coordinate adjustment circuit is also used to make multiple contact areas of the metal grid layer correspond to multiple LED area positions of the LED dot matrix.

Description

Technical Field

[0001] The invention relates to the technical field of LEDs, and in particular to a smart blackboard using LED display technology. Background Art

[0002] Setting up blackboards through LED display is widely used in the prior art. The relevant prior art also discloses LED blackboards that can realize local brightness adjustment. For example, patent document CN111179643A discloses a touch blackboard. This technology realizes the correspondence between the position of backlight lamp beads and the position of touch film by making the coordinates of backlight module lamp beads correspond to the coordinates of metal grid touch film, thereby realizing local adjustment of LED brightness. However, in practice, the local metal grid is easy to be damaged. In this case, local backlight adjustment cannot be achieved by touching the damaged part, but generally the entire electronic blackboard can still be used. Therefore, how to achieve local backlight adjustment without replacing the entire electronic blackboard has become a technical problem. Summary of the invention

[0003] The purpose of the present invention is to provide a smart blackboard with LED display technology to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] A smart blackboard with LED display technology includes a backlight total layer, wherein the backlight total layer includes a quantum dot film layer, a diffusion layer, a light guide layer, and an LED dot matrix arranged in sequence, a metal grid layer is arranged outside the quantum dot film layer, the metal grid layer is electrically connected to a touch coordinate adjustment circuit, and the LED dot matrix is ​​electrically connected to an LED dot matrix control circuit, the touch coordinate adjustment circuit is used to make a single contact area of ​​the metal grid layer correspond to a single LED area of ​​the LED dot matrix; the touch coordinate adjustment circuit is also used to make multiple contact areas of the metal grid layer correspond to a single LED area of ​​the LED dot matrix; the touch coordinate adjustment circuit is also used to make multiple contact areas of the metal grid layer correspond to multiple LED areas of the LED dot matrix.

[0006] Furthermore, the correspondence between the multiple contact areas of the metal grid layer and the position of a single LED area of ​​the LED dot matrix is ​​specifically configured as a working mode of the touch coordinate adjustment circuit: when the touch coordinate adjustment circuit detects that a target contact area of ​​the metal grid layer is damaged, and multiple contact areas around the target contact area detect a touch action, if the action is not confirmed as a valid action in a certain area, but the frequency of the action is greater than a first threshold, the touch coordinate adjustment circuit corresponds the action to the position of a single LED area, and feeds back to the LED dot matrix control circuit to light up the LED in the corresponding area.

[0007] Furthermore, the first threshold is 3.

[0008] Furthermore, the correspondence between the multiple contact areas of the metal grid layer and the position of a single LED area of ​​the LED dot matrix is ​​specifically configured as a working mode of the touch coordinate adjustment circuit: when the touch coordinate adjustment circuit does not detect damage to a target contact area of ​​the metal grid layer, but detects that touch action exists in multiple contact areas around the target contact area, if the action is not confirmed as a valid action in a certain area, but the frequency of the action is greater than a second threshold, the touch coordinate adjustment circuit corresponds the action to the position of a single LED area, and feeds back to the LED dot matrix control circuit to light up the LED in the corresponding area.

[0009] Furthermore, the second threshold is 5.

[0010] Furthermore, the correspondence between the multiple contact areas of the metal grid layer and the multiple LED area positions of the LED dot matrix is ​​specifically configured as a working mode of the touch coordinate adjustment circuit: when the touch coordinate adjustment circuit detects that there is one or more damage in certain target contact areas of the metal grid layer, and detects a touch action in the area, if the action is not confirmed as a valid action in a certain area, but the frequency of the action is greater than a third threshold, the touch coordinate adjustment circuit corresponds the action to the positions of the multiple LED areas, and feeds back to the LED dot matrix control circuit to light up the LEDs in the corresponding areas.

[0011] Furthermore, the third threshold is 2.

[0012] Furthermore, the multiple contact areas of the metal grid layer are corresponded to the positions of the multiple LED areas of the LED dot matrix, and specifically the working mode of the touch coordinate adjustment circuit is configured as follows: when the touch coordinate adjustment circuit does not detect damage to certain target contact areas, but detects a touch action in the area, such as the action is not confirmed as a valid action, but the frequency of the action is greater than a fourth threshold, the touch coordinate adjustment circuit corresponds the action to the positions of the multiple LED areas, and feeds back to the LED dot matrix control circuit to light up the LEDs in the corresponding areas.

[0013] Furthermore, the fourth threshold is 4.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This application can still normally implement corresponding position LED dimming even if the metal grid layer of a target or multiple targets is partially damaged or malfunctions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the composition of the smart blackboard of the LED display technology of the present invention. Implementation

[0017] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] In the prior art, the local metal grid of the electronic blackboard is easily damaged. In this case, the local backlight adjustment cannot be achieved by touching the damaged part, but the entire electronic blackboard can still be used. Therefore, how to achieve local backlight adjustment without replacing the entire electronic blackboard has become a technical problem. Figure 1 The smart blackboard of LED display technology disclosed in the present application includes a backlight total layer, the backlight total layer includes a quantum dot film layer 2, a diffusion layer 3, a light guide layer 4, and an LED dot matrix 5 arranged in sequence, a metal grid layer 1 is arranged outside the quantum dot film layer 2, the metal grid layer 1 is electrically connected to a touch coordinate adjustment circuit 6, and the LED dot matrix 5 is electrically connected to an LED dot matrix control circuit 7, the touch coordinate adjustment circuit 6 is used to correspond the position of a single contact area of ​​the metal grid layer 1 to a single LED area of ​​the LED dot matrix 5; the touch coordinate adjustment circuit 6 is also used to correspond the position of multiple contact areas of the metal grid layer 1 to a single LED area of ​​the LED dot matrix 5; the touch coordinate adjustment circuit 6 is also used to correspond the position of multiple contact areas of the metal grid layer 1 to multiple LED areas of the LED dot matrix 5; the touch coordinate adjustment circuit 6 can support the present application to still normally realize the corresponding position LED dimming when the metal grid layer of a certain target or multiple targets is partially damaged or fails.

[0019] The LED dot matrix screen is composed of LEDs (light emitting diodes), which display text, pictures, animations, videos, etc. by turning on and off the lamp beads. It is a modular display device with various components, usually composed of a display module, a control system and a power supply system. Taking a simple 8X8 dot matrix as an example, it is composed of 64 light emitting diodes, and each light emitting diode is placed at the intersection of the row line and the column line. When the corresponding row is set to 1 level and the corresponding column is set to 0 level, the corresponding diode will light up; if you want to light up the first point, connect pin 9 to a high level and pin 13 to a low level, then the first point will light up; if you want to light up the first row, connect pin 9 to a high level, and connect pins (13, 3, 4, 10, 6, 11, 15, 16) to a low level, then the first row will light up; if you want to light up the first column, connect pin 13 to a low level, and connect pins (9, 14, 8, 12, 1, 7, 2, 5) to a high level, then the first column will light up.

[0020] Preferably, the multiple contact areas of the metal grid layer 1 are corresponded to the position of a single LED area of ​​the LED dot matrix 5, specifically, the working mode of the touch coordinate adjustment circuit 6 is configured as follows: when the touch coordinate adjustment circuit 6 detects that a target contact area of ​​the metal grid layer 1 is damaged, and multiple contact areas around the target contact area detect a touch action, if the action is not confirmed as a valid action of a certain area, but the action frequency is greater than a first threshold, for example, the first threshold is 3, then the touch coordinate adjustment circuit 6 corresponds the action to the position of a single LED area, and feeds back to the LED dot matrix control circuit 7 to light up the LED of the corresponding area.

[0021] Or preferably, the multiple contact areas of the metal grid layer 1 are corresponded to the position of a single LED area of ​​the LED dot matrix 5, specifically, the working mode of the touch coordinate adjustment circuit 6 is configured as follows: when the touch coordinate adjustment circuit 6 does not detect damage to a target contact area of ​​the metal grid layer 1, but detects that there is a touch action in multiple contact areas around the target contact area, if the action is not confirmed as a valid action in a certain area, but the action frequency is greater than a second threshold, for example, the second threshold is 5, then the touch coordinate adjustment circuit 6 corresponds the action to the position of a single LED area, and feeds back to the LED dot matrix control circuit 7 to light up the LED in the corresponding area.

[0022] Preferably, the multiple contact areas of the metal grid layer 1 are corresponded to the multiple LED area positions of the LED dot matrix 5, specifically, the working mode of the touch coordinate adjustment circuit 6 is configured as follows: when the touch coordinate adjustment circuit 6 detects that there is one or more damages in certain target contact areas of the metal grid layer 1, and detects a touch action in the area, if the action is not confirmed as a valid action in a certain area, but the action frequency is greater than a third threshold, for example, the third threshold is 2, then the touch coordinate adjustment circuit 6 corresponds the action to the positions of the multiple LED areas, and feeds back to the LED dot matrix control circuit 7 to light up the LEDs in the corresponding areas.

[0023] Or preferably, the multiple contact areas of the metal grid layer 1 are corresponded to the multiple LED area positions of the LED dot matrix 5, specifically, the working mode of the touch coordinate adjustment circuit 6 is configured as follows: when the touch coordinate adjustment circuit 6 does not detect damage to certain target contact areas, but detects a touch action in the area, such as the action is not confirmed as a valid action, but the action frequency is greater than a fourth threshold, for example, the fourth threshold is 4, then the touch coordinate adjustment circuit 6 corresponds the action to the positions of the multiple LED areas, and feeds back to the LED dot matrix control circuit 7 to light up the LEDs in the corresponding areas.

Claims

1. A smart blackboard with LED display technology, comprising a backlight total layer, wherein the backlight total layer comprises a quantum dot film layer, a diffusion layer, a light guide layer, and an LED dot matrix arranged in sequence, and a metal grid layer is arranged outside the quantum dot film layer. It is characterized in that The metal grid layer is electrically connected to the touch coordinate adjustment circuit, and the LED dot matrix is ​​electrically connected to the LED dot matrix control circuit, and the touch coordinate adjustment circuit is used to make a single contact area of ​​the metal grid layer correspond to a single LED area of ​​the LED dot matrix; the touch coordinate adjustment circuit is also used to make multiple contact areas of the metal grid layer correspond to a single LED area of ​​the LED dot matrix; the touch coordinate adjustment circuit is also used to make multiple contact areas of the metal grid layer correspond to multiple LED area positions of the LED dot matrix; The making the multiple contact areas of the metal grid layer correspond to the positions of the single LED area of ​​the LED dot matrix is ​​specifically to configure the working mode of the touch coordinate adjustment circuit as follows: when the touch coordinate adjustment circuit does not detect that a certain target contact area of ​​the metal grid layer is damaged, but detects that a touch action exists in multiple contact areas around the target contact area, if the action is not confirmed as a valid action of a certain area, but the action frequency is greater than a second threshold, the touch coordinate adjustment circuit makes the action correspond to the position of the single LED area, and feeds back to the LED dot matrix control circuit to light up the LED of the corresponding area; The method of making the multiple contact areas of the metal grid layer correspond to the positions of the multiple LED areas of the LED dot matrix is ​​specifically to configure the working mode of the touch coordinate adjustment circuit as follows: when the touch coordinate adjustment circuit does not detect damage to certain target contact areas, but detects a touch action in the area, if the action is not confirmed as a valid action, but the frequency of the action is greater than a fourth threshold, the touch coordinate adjustment circuit makes the action correspond to the positions of the multiple LED areas, and feeds back to the LED dot matrix control circuit to light up the LEDs in the corresponding areas.

2. The smart blackboard of LED display technology according to claim 1, It is characterized in that The method of making the multiple contact areas of the metal grid layer correspond to the positions of a single LED area of ​​the LED dot matrix is ​​specifically to configure the working mode of the touch coordinate adjustment circuit as follows: when the touch coordinate adjustment circuit detects that a target contact area of ​​the metal grid layer is damaged, and multiple contact areas around the target contact area detect a touch action, if the action is not confirmed as a valid action of a certain area, but the frequency of the action is greater than a first threshold, the touch coordinate adjustment circuit makes the action correspond to the position of the single LED area, and feeds back to the LED dot matrix control circuit to light up the LED in the corresponding area.

3. The smart blackboard of LED display technology according to claim 2, It is characterized in that The first threshold is 3.

4. The smart blackboard of LED display technology according to claim 1, It is characterized in that The second threshold is 5.

5. The smart blackboard of LED display technology according to claim 1, It is characterized in that The method of making the multiple contact areas of the metal grid layer correspond to the positions of the multiple LED areas of the LED dot matrix is ​​specifically to configure the working mode of the touch coordinate adjustment circuit as follows: when the touch coordinate adjustment circuit detects that one or more damages are present in certain target contact areas of the metal grid layer, and detects a touch action in the area, if the action is not confirmed as a valid action in a certain area, but the frequency of the action is greater than a third threshold, the touch coordinate adjustment circuit makes the action correspond to the positions of the multiple LED areas, and feeds back to the LED dot matrix control circuit to light up the LEDs in the corresponding areas.

6. The smart blackboard of LED display technology according to claim 5, It is characterized in that The third threshold is 2.

7. The smart blackboard of LED display technology according to claim 1, It is characterized in that The fourth threshold is 4.

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