Display module

Abstract

A display module includes: a substrate; a first driving circuit disposed in a central region on the substrate in a vertical direction; a first pixel array formed in a left side region of the substrate with reference to the first driving circuit, the first pixel array including a plurality of first pixels arranged in a matrix shape; and a second pixel array formed in a right side region of the substrate referring to the first driving circuit, the second pixel array including a plurality of second pixels arranged in a matrix shape. Each of the plurality of first pixels and each of the plurality of second pixels includes a plurality of inorganic light emitting devices, and each of the first pixel array and the second pixel array is separated from the first driving circuit by a preset distance.

Description

Technical Field

[0001] The present disclosure relates to a display module, and more particularly, to a display device including a pixel array composed of self-luminous devices. Background Art

[0002] The related art borderless display module has been designed to operate the display module by providing a driving circuit (eg, a gate driver) between pixels.

[0003] In this case, the display module of the prior art may be configured not to divide the effective area and the frame on the substrate, which may cause signal coupling between the pixels and the driving circuit, and there is a problem of uneven design density on the substrate.

[0004] In addition, if the data line corresponding to the pixel partially overlaps with the driving circuit, the following unevenness problems may occur: signal coupling occurs with the data line according to the driving of the driving circuit, the driving of the driving circuit affects specific pixels, and the brightness of the specific pixels deteriorates compared with the remaining pixels.

[0005] However, when at least one display device is implemented by multiple display modules, the existence of a specific area (e.g., a border area) for setting a driving circuit may cause limitations in design. In particular, when a large display panel is formed by coupling multiple display modules, the existence of a border at the coupled portion may make it difficult to provide a seamless image. Summary of the invention

[0006] According to one aspect of the present disclosure, a display module includes: a substrate; a first drive circuit, which is vertically arranged in a central area on the substrate; a first pixel array, formed on a left area of ​​the substrate relative to the first drive circuit, wherein the first pixel array may include a plurality of first pixels arranged in a matrix form; and a second pixel array, formed on a right area of ​​the substrate relative to the first drive circuit, wherein the second pixel array may include a plurality of second pixels arranged in a matrix form, wherein each pixel of the plurality of first pixels and each pixel of the plurality of second pixels may include a plurality of inorganic light-emitting devices, and wherein each of the first pixel array and the second pixel array is separated from the first drive circuit by a preset distance.

[0007] The display module may also include: a plurality of second driving circuits formed on the substrate, the plurality of second driving circuits being configured to drive a plurality of inorganic light-emitting devices of a plurality of first pixels and a plurality of second pixels, and the first driving circuit being configured to generate a control signal based on a clock signal applied through at least one clock line, and drive the plurality of second driving circuits by providing the generated control signal to the plurality of second driving circuits.

[0008] At least one clock line may overlap with the first driving circuit on the substrate.

[0009] The vertical form of the first driving circuit may divide the substrate into a left area and a right area, and the plurality of first pixels may be in close contact with each other, and the plurality of second pixels may be in close contact with each other.

[0010] The plurality of first pixels may be in direct contact with one another, and the plurality of second pixels may be in direct contact with one another.

[0011] A plurality of inorganic light emitting devices in the first pixel array may be spaced apart from one another, and a plurality of inorganic light emitting devices in the second pixel array may be spaced apart from one another.

[0012] A portion of the upper region and a portion of the lower region in the left region may be a first redundant region where no inorganic light-emitting device is set, and a portion of the upper region and a portion of the lower region in the right region may be a second redundant region where no inorganic light-emitting device is set.

[0013] The display module may also include: a first dummy first drive circuit, which is arranged in the outer part of the left area; a second dummy first drive circuit, which is arranged in the outer part of the right area, and each of the first dummy first drive circuit and the second dummy first drive circuit may be configured to maintain the same potential as the first drive circuit.

[0014] The left area of ​​the substrate and the right area of ​​the substrate may be symmetrical about the first driving circuit in a vertical form.

[0015] Each of the first driving circuit, the first dummy first driving circuit, and the second dummy first driving circuit may include a thin film transistor.

[0016] According to one aspect of the present disclosure, a display module includes: a substrate; a first driving circuit on the substrate and configured to divide the substrate into a first side and a second side; a first pixel array on the first side of the substrate, the first pixel array including a plurality of first pixels; and a second pixel array on the second side of the substrate, the second pixel array including a plurality of second pixels, wherein the plurality of first pixels and the plurality of second pixels may be arranged in a matrix form, wherein each of the plurality of first pixels and each of the plurality of second pixels may include a plurality of inorganic light-emitting devices, and wherein each of the first pixel array and the second pixel array may be separated from the first driving circuit by a preset distance.

[0017] The display module may also include: a plurality of second driving circuits on the substrate; at least one data line on the substrate; and at least one clock line on the substrate, wherein the plurality of second driving circuits may be configured to drive a plurality of inorganic light-emitting devices of a plurality of first pixels and a plurality of second pixels, and wherein the first driving circuit is configured to generate a control signal based on a clock signal applied through at least one clock line, and drive the plurality of second driving circuits by providing the generated control signal to the plurality of second driving circuits.

[0018] At least one clock line overlaps with the first driving circuit on the substrate.

[0019] Adjacent pixels of the plurality of first pixels may be in close contact with each other, and adjacent pixels of the plurality of second pixels may be in close contact with each other.

[0020] Adjacent pixels of the plurality of first pixels may be in direct contact with each other, and adjacent pixels of the plurality of second pixels may be in direct contact with each other.

[0021] Adjacent inorganic light emitting devices of the plurality of inorganic light emitting devices may be spaced apart from each other.

[0022] The display module may also include: a first redundant area, an upper edge portion of the first side and a lower edge portion of the first side; and a second redundant area, an upper edge portion of the second side and a lower edge portion of the second side, and there may be no inorganic light-emitting device in the first redundant area and the second redundant area.

[0023] The display module may also include: a first dummy first drive circuit, on an edge of the first side opposite to the first drive circuit; and a second dummy first drive circuit, on an edge of the second side opposite to the first drive circuit, wherein each of the first dummy first drive circuit and the second dummy first drive circuit is configured to maintain the same potential as the first drive circuit.

[0024] The first side and the second side may be symmetrical about the first driving circuit.

[0025] According to one aspect of the present disclosure, a display module includes: a substrate; a first pixel array, on a first side of the substrate, the first pixel array includes a plurality of first pixels; a second pixel array, on a second side of the substrate, the second pixel array includes a plurality of second pixels; and a first driving circuit, on the substrate between the first pixel array and the second pixel array, wherein each of the first pixel array and the second pixel array can be separated from the first driving circuit by a preset distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and other aspects, features and advantages of certain embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:

[0027] Figure 1 is a diagram showing a pixel structure of a display module according to the prior art;

[0028] Figure 2 is a block diagram showing a display module according to one or more embodiments of the present disclosure;

[0029] Figure 3 is a diagram showing a pixel structure of a display module according to one or more embodiments of the present disclosure;

[0030] Figure 4 is a diagram showing distances between pixel arrays according to one or more embodiments of the present disclosure;

[0031] Figure 5 is a diagram showing a pixel structure of a display module according to one or more embodiments of the present disclosure;

[0032] Figure 6 is a diagram illustrating distances between pixel arrays according to one or more embodiments of the present disclosure. DETAILED DESCRIPTION

[0033] In the present disclosure, in the case where it is determined that the detailed description of the related known technology may unnecessarily obscure the gist of the present disclosure, its detailed description will be omitted. In addition, redundant descriptions of the same configuration may also be omitted.

[0034] Suffixes of elements used in the following description, such as “part”, are added or used in combination with consideration of convenience in preparing the present disclosure, and themselves have no meaning or role of discriminating one from another.

[0035] The terms used in the present disclosure have been used to describe one or more embodiments and are not intended to be limiting. Unless otherwise specified, a singular expression includes a plural expression.

[0036] In the present disclosure, it should be understood that terms such as “having” or “including” are used herein to indicate the existence of features, quantities, steps, operations, elements, components or combinations thereof, without excluding the possibility of the existence or addition of one or more other features, quantities, steps, operations, elements, components or combinations thereof.

[0037] As used herein, expressions such as “first”, “second”, “1st”, “2nd”, etc. may be used to refer to various elements regardless of their order and / or importance, and it should be noted that these expressions are only used to distinguish one element from another rather than to limit the relevant elements.

[0038] When a certain element (for example, a first element) is indicated as being "(operably or communicatively) coupled to" or "connected to" another element (for example, a second element), it can be understood that the certain element is directly coupled to the other element or is coupled through other elements (for example, a third element). Alternatively, when a certain element (for example, a first element) is indicated as being "directly coupled to" or "directly connected to" a certain element (for example, the first other element (for example, the second element)), it can be understood that there is no other element (for example, the third element) between the certain element and the other element.

[0039] As used herein, the expression “at least one of a, b, or c” means “only a,” “only b,” “only c,” “both a and b,” “both a and c,” “both b and c,” or “all of a, b, and c.”

[0040] Unless otherwise defined, the terms used in the embodiments of the present disclosure may be construed as having meanings that are generally understood by those of ordinary skill in the art.

[0041] Various embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0042] Figure 1 is a diagram showing a pixel structure of a display module according to the prior art.

[0043] Reference Figure 1 A display module in the related art may include a pixel region 12 including a plurality of inorganic light-emitting devices 14 on a substrate 16 .

[0044] For example, a related art borderless display module has been designed to operate the display module by providing a driving circuit (eg, a gate driver) between pixels.

[0045] In this case, the display module of the related art may be configured not to divide the effective area and the frame on the substrate, which may cause a signal coupling phenomenon between the pixel and the driving circuit, and there is a problem of uneven design density on the substrate.

[0046] For example, refer to Figure 1 The display module 10 in the related art may include a plurality of pixels, that is, a pixel array arranged (or disposed) in a matrix form.

[0047] The pixel array may include multiple row lines or multiple column lines. In some cases, the row lines may be referred to as horizontal lines and the column lines may be referred to as vertical lines, wherein region A includes pixel columns without drive circuits and region B includes pixel columns with drive circuits.

[0048] The related art display module 10 may include a first driving circuit 20 (eg, a gate driver or a scan driver) between a plurality of pixels and may include a clock line 22 for applying a clock signal (or, a gate in panel (GIP)) to the first driving circuit 20 .

[0049] like Figure 1 As shown, the first driving circuit 20 can be arranged between multiple pixels in the area B along the horizontal direction. Since the data lines 24 (or, pixel lines) corresponding to the pixels arranged between the multiple first driving circuits 20 overlap with the multiple first driving circuits 20, signal coupling may occur, and there is a problem that the driving (or, signal output) of the first driving circuit 20 affects the adjacently arranged pixels (for example, a brightness difference occurs with other pixels).

[0050] In addition, if Figure 1 As shown, undesirable mura may be generated in pixels adjacent to the clock line 22 for applying a clock signal to the first driving circuit 20 .

[0051] Below, while implementing a borderless display module according to one or more embodiments of the present disclosure, various methods will be described to minimize the occurrence of signal coupling between clock lines and data lines or device overlap, and minimize the occurrence of non-uniformity between multiple pixels, image quality defects, and image quality distortion caused by patchiness of some of the pixels.

[0052] Figure 2 is a block diagram illustrating a display module according to one or more embodiments of the present disclosure.

[0053] Reference Figure 2 , the display module 100 according to an embodiment of the present disclosure may include a substrate 110 , a first driving circuit 120 , a second driving circuit 130 , and a plurality of inorganic light emitting devices 140 .

[0054] The first driving circuit 120 according to an embodiment of the present disclosure may be disposed on the substrate 110, and the first driving circuit 120 may be in a vertical form. For example, the first driving circuit 120 may be disposed in a vertical form in a central area of ​​the substrate.

[0055] The display module 100 according to the embodiment may be formed at a left region of the substrate 110 with respect to the first driving circuit 120 , and may include a first pixel array in which each pixel including a plurality of inorganic light emitting devices 140 is arranged in a matrix form.

[0056] In addition, the display module 100 may be formed on a right region of the substrate 110 with respect to the first driving circuit 120 , and may include a second pixel array in which each pixel including a plurality of inorganic light emitting devices 140 is arranged in a matrix form.

[0057] In the display module 100 , a driving circuit layer 112 may be formed on a substrate 110 , and the display module 100 may have a structure in which an inorganic light emitting device 140 is disposed above the driving circuit layer 112 , which will be described below.

[0058] First, refer to Figure 3 , the structure of the display module 100 according to an embodiment of the present disclosure will be described in detail.

[0059] Figure 3 is a diagram showing a pixel structure of a display module according to one or more embodiments of the present disclosure.

[0060] Reference Figure 3 , the display module 100 may include a first driving circuit 120 disposed in a vertical form in a central area on the substrate 110. According to an example, the first driving circuit 120 may divide the substrate 110 into a left area and a right area.

[0061] According to an embodiment, the display module 100 may include: a first pixel array 150 formed in a left area of ​​the substrate 110 relative to the first driving circuit 120, in which each pixel 112 including a plurality of inorganic light-emitting devices 140 is arranged in a matrix form; and a second pixel array 160 formed in a right area of ​​the substrate 110 relative to the first driving circuit 120, in which each pixel 112 including a plurality of inorganic light-emitting devices 140 is arranged in a matrix form.

[0062] Here, the first pixel array 150 and the second pixel array 160 may be respectively disposed to be spaced apart from the first driving circuit 120 by a preset distance.

[0063] In an embodiment, the plurality of pixels 112 included in the first pixel array 150 may be disposed in close contact with each other. For example, the plurality of pixels 112 included in the first pixel array 150 may be disposed in direct contact with each other in a matrix form.

[0064] In addition, the plurality of pixels 112 included in the second pixel array 160 may also be arranged to be in close contact with each other, for example, the plurality of pixels 112 included in the second pixel array 160 may be arranged to be in direct contact with each other in a matrix form.

[0065] Meanwhile, each of the pixels 112 may include three types of sub-pixels, such as a red (R) sub-pixel, a green (G) sub-pixel, and a blue (B) sub-pixel. Each sub-pixel may include a plurality of inorganic light-emitting devices 140 forming a sub-pixel (e.g., R, G, B), and may emit light according to a driving current provided by the second driving circuit 130.

[0066] For example, each of the pixels 112 included in each of the first pixel array 150 and the second pixel array 160 may include three types of inorganic light-emitting devices 140, such as an R inorganic light-emitting device corresponding to an R sub-pixel, a G inorganic light-emitting device corresponding to a G sub-pixel, and a B inorganic light-emitting device corresponding to a B sub-pixel.

[0067] Alternatively, each pixel 112 may include three blue inorganic light emitting devices. In this case, a color filter for realizing R, G, and B colors may be provided on each inorganic light emitting device 140. In an embodiment, the color filter may be a quantum dot (QD) color filter, but the present disclosure is not limited thereto.

[0068] Here, the inorganic light emitting device 140 may refer to a light emitting device manufactured using an inorganic material, unlike an organic light emitting diode (OLED) manufactured using an organic material.

[0069] Specifically, according to one or more embodiments of the present disclosure, the inorganic light emitting device 140 may be a micro light emitting diode (LED) (μ-LED) having a size less than or equal to 100 micrometers (μm). In this case, the display module 100 may be a micro LED display module in which each sub-pixel is implemented as a micro LED.

[0070] A micro LED display module may be formed from a plurality of inorganic LEDs each less than or equal to 100 microns.

[0071] Compared with liquid crystal display (LCD) panels that require backlighting, micro LED display modules can provide better contrast, response time and energy efficiency. At the same time, both organic LED (OLED) and micro LED have good energy efficiency, but micro LED can provide better performance than OLED in terms of brightness, luminous efficiency and lifespan.

[0072] Specifically, since micro LEDs have a characteristic of improved efficiency when using relatively high currents compared to OLEDs, in order to provide a stable high current, the micro LED display module 100 may provide a driving voltage to the second driving circuit 130 through a metal layer separated from a metal layer on which a gate electrode, a source electrode, or a drain electrode of a thin film transistor (TFT) is formed, which will be described below.

[0073] However, in one or more embodiments of the present disclosure, the inorganic light emitting device 140 is not necessarily limited to a micro LED.

[0074] In each subpixel, a second driving circuit 130 for driving the inorganic light emitting device 140 forming the corresponding subpixel may be provided based on a data voltage applied through the data line 124. Since the second driving circuit 130 is provided for each subpixel, it may also be referred to as a subpixel circuit.

[0075] According to an embodiment, a plurality of second driving circuits 130 formed on the substrate 110 may be provided for each of the pixels 112 , and may drive a plurality of inorganic light emitting devices 140 included in each of the pixels 112 corresponding to the data lines 124 .

[0076] According to an embodiment, the first driving circuit 120 may generate a control signal for driving the plurality of second driving circuits 130 based on a clock signal applied through the clock line 122 , and provide the generated clock signal to the plurality of second driving circuits 130 .

[0077] In addition, according to one or more embodiments of the present disclosure, unlike the display module of the related art, the display module 100 may generate a control signal for driving the second driving circuit 130, and the first driving circuit 120 for providing the generated control signal to the second driving circuit 130 may be disposed in a region between the first pixel array 150 and the second pixel array 160. At this time, the first driving circuit 120 may be, for example, a gate driver circuit (or a scan driver circuit).

[0078] like Figure 3 As shown, since the first pixel array 150 and the second pixel array 160 are disposed on the substrate 110 , and the first driving circuit 120 and the second driving circuit 130 are disposed in the effective area of ​​the display module 100 for displaying an image, a borderless display module 100 can be implemented.

[0079] Furthermore, unlike the display module of the related art, since the display module 100 according to the embodiment of the present disclosure is configured so that the pixel 112 is not disposed adjacent to the first driving circuit 120, the problem of brightness reduction of a specific pixel does not occur even when the first driving circuit 120 is driven. Furthermore, since the display module 100 according to the embodiment of the present disclosure is configured so that the data line 124 (or, pixel line) corresponding to each pixel 112 does not overlap at the first driving circuit 120, signal coupling can be avoided.

[0080] Furthermore, since the display module 100 according to an embodiment of the present disclosure is configured such that the clock line 122 for applying a clock signal to the first driving circuit 120 (or, a control signal line for applying a gate-in-panel (GIP) control signal) is formed to overlap at the first driving circuit 120, signal coupling does not occur between the clock line 122 and the data line 124. For example, the clock line 122 and the first driving circuit 120 may be formed at the same position on different layers from each other on the substrate 110.

[0081] For ease of description, Figure 3 1 and 2 show that it is assumed that 18 pixels 112 are formed on the substrate 110, the first pixel array 150 includes 9 pixels arranged in close contact in a 3×3 form, and the second pixel array 160 includes 9 pixels arranged in close contact in a 3×3 form, but the present disclosure is not limited thereto. For example, the pixel array may include a plurality of pixels 112 arranged in close contact in various matrix forms, such as, but not limited to, a 2×3 form, a 4×4 form, etc.

[0082] Figure 4 is a diagram illustrating distances between pixel arrays according to one or more embodiments of the present disclosure.

[0083] In the prior art, a plurality of pixels are arranged on the substrate 110 in a matrix form with a certain distance between them. Figure 1 As shown, the area of ​​the design region is smaller than the area of ​​the allocated design region. Accordingly, the area on the substrate 110 where the design is left blank may generate a loading effect due to the pattern density difference in the photolithography process.

[0084] like Figure 3 As shown, the plurality of pixels 112 included in the pixel array may be closely arranged, but the position of the μLED PAD may remain the same as that of the borderless display module of the prior art. That is, each of the inorganic light-emitting devices 140 included in the first pixel array 150 may be arranged spaced apart from each other, and each of the inorganic light-emitting devices 140 included in the second pixel array 160 may be arranged spaced apart from each other.

[0085] like Figure 3 and Figure 4 As shown, since the plurality of pixels 112 are closely disposed, a designable redundant area 170 may exist on the substrate 110 .

[0086] For example, refer to Figure 4, if each of the first pixel array 150 and the second pixel array 160 includes 9 pixels arranged in close contact in a 3×3 form, more redundant areas 170 may exist on the substrate 110 than on the display module of the related art. Here, the redundant area 170 may refer to an area where the inorganic light emitting device 140 is not disposed.

[0087] For example, a portion of the upper area and a portion of the lower area in the left area relative to the first driving circuit 120 may be a redundant area 170 where the inorganic light-emitting device 140 is not set, and a portion of the upper area and a portion of the lower area in the right area relative to the first driving circuit 120 may be a redundant area 170 where the inorganic light-emitting device 140 is not set.

[0088] Each of the first pixel array 150 and the second pixel array 160 may be disposed to be spaced apart from the first driving circuit 120 by a preset distance using a redundant area 170 on the substrate 110. Here, the preset distance may include any distance that can prevent luminance degradation from occurring in a specific pixel 112 due to driving of the first driving circuit 120 and a signal coupling phenomenon from occurring between the clock line 122 and the data line 124.

[0089] Figure 5 is a diagram showing a pixel structure of a display module according to one or more embodiments of the present disclosure.

[0090] Reference Figure 5 , each of the first pixel array 550 and the second pixel array 560 according to an embodiment of the present disclosure may include a plurality of pixels 112 disposed in close contact with each other in a 2×2 form.

[0091] For example, 8 pixels may be formed on the substrate 110, the first pixel array 550 may include 4 pixels arranged in close contact in a 2×2 form, and the second pixel array 560 may include 4 pixels arranged in close contact in a 2×2 form. The above embodiments are provided for convenience of description, and the present disclosure is not limited thereto.

[0092] Reference Figure 3 and Figure 5 , a dummy first driving circuit 175 may be disposed in each of a left outer region among the left regions and a right outer region among the right regions on the substrate 110 .

[0093] Here, the dummy first driving circuit 175 may not be a configuration for generating and transmitting a control signal for driving the second driving circuit 130 , but may include a circuit that is the same as (or similar to) the first driving circuit 120 .

[0094] For example, each of the first driving circuit 120 and the dummy first driving circuit 175 may include a thin film transistor (TFT), and the second driving circuit 130 may include a TFT.

[0095] According to the embodiment, since the substrate 110 includes the circuit patterns whose left and right sides are symmetrical based on the first driving circuit 120 in a vertical form, a loading effect caused by a difference in pattern density during a photolithography process may be prevented.

[0096] Meanwhile, the dummy first driving circuit 175 may not be in a floating state, and may maintain the same potential as the first driving circuit 120 .

[0097] For example, each node of the dummy first driving circuit 175 may maintain the same potential using a constant voltage line (eg, but not limited to, VGH, VGL, driving voltage (VDD), ground voltage (VSS), etc.), thereby preventing image noise caused by a floating pattern.

[0098] Figure 6 is a diagram illustrating distances between pixel arrays according to one or more embodiments of the present disclosure.

[0099] like Figure 4 and Figure 6 As shown, if the plurality of pixels 112 are grouped, that is, designed to be arranged in close contact with each other, there may be a redundant space 170 on the substrate 110. For example, the 3×3 form may be 600um, and the 2×2 form may be 400um, and the more groups there are, the wider the area of ​​the first drive circuit 120, that is, the area where the gate driver can be designed, can be. As in the above embodiment, 400um, 600um, etc. are sufficient to design the first drive circuit 120 in a vertical form.

[0100] Refer again Figure 2 , the display module 100 according to an embodiment of the present disclosure may include various circuits for driving a plurality of inorganic light emitting devices 140. Specifically, the second driving circuit 130 may provide a driving current to the plurality of inorganic light emitting devices 140. Specifically, the second driving circuit 130 may provide a driving current with a limited size and driving time to the inorganic light emitting devices 140 based on a data voltage, a driving voltage, and various control signals applied from the first driving circuit 120.

[0101] That is, the second driving circuit 130 may perform pulse amplitude modulation (PAM) driving and / or pulse width modulation (PWM) driving on the inorganic light emitting device 140 , and control the brightness of light emitted by the inorganic light emitting device 140 .

[0102] To this end, the second driving circuit 130 may include: a PAM circuit for providing a driving current of a magnitude corresponding to a PAM data voltage to the inorganic light-emitting device 140; and / or a PWM circuit for providing the driving current provided by the PAM circuit to the inorganic light-emitting device 140 within a time corresponding to the PWM data voltage.

[0103] Specifically, when the inorganic light emitting device 140 is operated in a PWM driving method, various grayscales can be represented by different driving times of the driving current even if the magnitude of the driving current is the same. Accordingly, since the problem that the wavelength of light emitted by the inorganic light emitting device varies according to the magnitude of the driving current can be solved, more enhanced color reproducibility can be achieved.

[0104] The first driving circuit 120 may be a driving circuit for driving the second driving circuit 130. That is, the first driving circuit 120 may generate a control signal for operating the second driving circuit 130 and provide it to the first driving circuit 120.

[0105] Specifically, the first drive circuit 120 can receive inputs of multiple clock signals and control signals for controlling the operation of the first drive circuit 120 (for example, a reset signal, a start signal, etc.), and generate a control signal for controlling the operation of the second drive circuit 130, and provide the generated control signal to the second drive circuit 130.

[0106] For example, the first driving circuit 120 may generate various control signals for driving a pixel array of the display module 100 on a row line basis, wherein the pixels 112 are arranged in close contact with each other in a matrix form, and provide the control signals to the second driving circuit 130 .

[0107] The first driving circuit 120 in one or more embodiments of the present disclosure may refer to at least a portion of a gate driver (or a scan driver) that drives a plurality of pixels (or sub-pixels) on a row line basis, and may refer to a second driving circuit 130 that sequentially drives the sub-pixels of each pixel forming a pixel array through each row line.

[0108] For each inorganic light emitting device 140 , there may be a second driving circuit 130 for driving each inorganic light emitting device on the substrate 110 .

[0109] Each of the inorganic light emitting devices 140 may be mounted or disposed on the substrate 110 , respectively, to be electrically connected to the corresponding second driving circuit 130 .

[0110] For example, the R inorganic light emitting device may be mounted or disposed on the substrate 110 so that its anode electrode and cathode electrode are respectively connected to the anode electrode and cathode electrode of the second driving circuit 130, and the same may be true for the G inorganic light emitting device and the B inorganic light emitting device.

[0111] According to one or more embodiments, the inorganic light emitting device 140 is not limited to a flip chip type micro LED, and may be a lateral type or a vertical type micro LED.

[0112] According to one or more embodiments of the present disclosure, the display module 100 may further include various circuits for driving the second driving circuit 130 in addition to the first driving circuit 120 .

[0113] Here, the various circuits may include a source driver circuit (or a data driver circuit) for supplying a data voltage (eg, a PAM data voltage or a PWM data voltage) to each pixel (or each sub-pixel) of a pixel array arranged in a matrix form.

[0114] Furthermore, each circuit may include a MUX circuit for respectively selecting a plurality of sub-pixels forming a pixel.

[0115] In addition, the various circuits may include a driving voltage supply circuit for supplying various driving voltages to each second driving circuit 130 included in the display module 100 .

[0116] In addition, the various circuits may include: a clock signal providing circuit for providing various clock signals for driving a gate driver circuit or a data driver circuit; and a scan voltage providing circuit for providing a scan voltage required to drive a PWM circuit (for example, a voltage that changes linearly with time between two voltages different from each other).

[0117] Alternatively, at least a portion of the various circuits described above may be implemented in a separate chip form and mounted on an external printed circuit board (PCB) together with a timing controller (TCON), and may be connected to the second driving circuit 130 formed on the TFT layer of the display module 100 through thin film on glass (FOG) wiring.

[0118] Alternatively, at least a portion of the various circuits described above may be implemented in a separate chip form and disposed on a film in a chip on film (COF) form and connected to the second driving circuit 130 formed at the TFT layer of the display module 100 through FOG wiring.

[0119] Alternatively, at least a portion of the various circuits described above may be implemented in the form of a separate chip and disposed in a COG form (i.e., disposed on the rear surface of the glass substrate of the display module 100 (the surface opposite to the surface of the glass substrate on which the TFT layer is formed)), and connected to the second driving circuit 130 formed at the TFT layer of the display module 100 through connection wiring.

[0120] For example, among the various circuits described above, a scan voltage supply circuit and a MUX circuit may be formed on a driving circuit layer, a data driver circuit may be disposed on the rear surface of a glass substrate of the display module 100, and a driving voltage supply circuit, a clock signal supply circuit and a TCON may be disposed on a PCB, but are not limited thereto.

[0121] According to one or more embodiments of the present disclosure described above, a borderless display module can be provided. In addition, an optimized driving circuit can be designed, and an inorganic light-emitting device can be stably driven. In addition, a display module with enhanced color reproducibility can be provided. In addition, the present disclosure can help to miniaturize and lighten the display panel.

[0122] In addition, in the above-mentioned embodiments of the present disclosure, the TFTs constituting the TFT layer (or TFT panel) are not limited to a specific structure or type. That is, the TFTs mentioned in one or more embodiments of the present disclosure can be implemented by low-temperature polysilicon (LTPS) TFTs, oxide TFTs, polycrystalline silicon or amorphous silicon (TFTs), organic TFTs, graphene TFTs, etc., and can be applied by manufacturing only P-type (or N-type) MOSFETs in the Si wafer CMOS process.

[0123] Although the present disclosure has been shown and described with reference to one or more embodiments of the present disclosure, it will be understood that the various example embodiments are intended to be illustrative rather than restrictive. Those skilled in the art will appreciate that various changes may be made in form and details without departing from the true spirit and full scope of the present disclosure and including the appended claims and their equivalents.

Claims

1. A display module, comprising: substrate; A first driving circuit is disposed in a vertical form in a central area on the substrate; A first pixel array formed on a left area of ​​the substrate relative to the first driving circuit, wherein the first pixel array includes a plurality of first pixels arranged in a matrix form; and a second pixel array formed on a right area of ​​the substrate relative to the first driving circuit, wherein the second pixel array includes a plurality of second pixels arranged in a matrix form, wherein each pixel of the plurality of first pixels and each pixel of the plurality of second pixels comprises a plurality of inorganic light emitting devices, and Wherein, each of the first pixel array and the second pixel array is separated from the first driving circuit by a preset distance.

2. The display module according to claim 1, further comprising: A plurality of second driving circuits are formed on the substrate, wherein the plurality of second driving circuits are configured to drive the plurality of inorganic light emitting devices of the plurality of first pixels and the plurality of second pixels, and The first driving circuit is configured to generate a control signal based on a clock signal applied through at least one clock line, and drive the plurality of second driving circuits by providing the generated control signal to the plurality of second driving circuits.

3. The display module according to claim 2, wherein: The at least one clock line overlaps with the first driving circuit on the substrate.

4. The display module according to claim 1, wherein: The first driving circuit in a vertical form divides the substrate into the left area and the right area, and The plurality of first pixels are in close contact with each other, and the plurality of second pixels are in close contact with each other.

5. The display module according to claim 4, wherein: The plurality of first pixels are in direct contact with each other, and the plurality of second pixels are in direct contact with each other.

6. The display module according to claim 4, wherein: The plurality of inorganic light emitting devices in the first pixel array are spaced apart from each other, and Wherein, the plurality of inorganic light-emitting devices in the second pixel array are spaced apart from each other.

7. The display module according to claim 1, wherein: A portion of the upper region and a portion of the lower region in the left region are first redundant regions where no inorganic light-emitting devices are disposed. Part of the upper region and part of the lower region in the right region are second redundant regions where no inorganic light-emitting devices are arranged.

8. The display module according to claim 1, further comprising: A first dummy first driving circuit is arranged at an outer portion of the left area; A second dummy first driving circuit is arranged at an outer portion of the right area, Each of the first dummy first driving circuit and the second dummy first driving circuit is configured to maintain the same potential as the first driving circuit.

9. The display module according to claim 1, wherein: The left area of ​​the substrate and the right area of ​​the substrate are symmetrical with respect to the first driving circuit in a vertical form.

10. The display module according to claim 8, wherein: Each of the first driving circuit, the first dummy first driving circuit, and the second dummy first driving circuit includes a thin film transistor.

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