CN114155807B - Pixel driving device and pixel driving method - Google Patents
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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Abstract
本申请涉及显示技术领域，具体公开一种像素驱动装置和像素驱动方法，用于实现像素单元的n比特灰阶显示，装置包括：第一驱动单元，连接像素单元，用于在显示周期内依次传输a比特灰阶数据至像素单元；第二驱动单元，连接像素单元，用于在显示周期内依次传输b比特灰阶数据至像素单元；第一电流源，连接像素单元，为像素单元提供第一驱动电流，第一驱动电流为高灰阶所对应的电流；第二电流源，连接像素单元，为像素单元提供第二驱动电流，第二驱动电流为低灰阶所对应的电流；其中，第一驱动电流大于第二驱动电流，a+b＝n,其中，a、b、n为正整数。由此利于准确进行低灰阶显示。
The present application relates to the field of display technology, and specifically discloses a pixel driving device and a pixel driving method for realizing n-bit grayscale display of a pixel unit, wherein the device comprises: a first driving unit connected to the pixel unit, and used to sequentially transmit a-bit grayscale data to the pixel unit during a display period; a second driving unit connected to the pixel unit, and used to sequentially transmit b-bit grayscale data to the pixel unit during a display period; a first current source connected to the pixel unit, and providing a first driving current to the pixel unit, and the first driving current is a current corresponding to a high grayscale; a second current source connected to the pixel unit, and providing a second driving current to the pixel unit, and the second driving current is a current corresponding to a low grayscale; wherein the first driving current is greater than the second driving current, and a+b=n, wherein a, b, and n are positive integers. This is conducive to accurate low grayscale display.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a pixel driving device and a pixel driving method.
Background
The Micro LED display technology is a display technology that a self-luminous micron-sized LED is taken as a luminous pixel unit, and the self-luminous micron-sized LED is assembled on a driving panel to form a high-density LED array, and compared with an LCD (liquid crystal display) and an OLED (organic light emitting diode), the Micro LED display technology has the advantages of being large in brightness, resolution, contrast ratio, energy consumption, service life, response speed, thermal stability and the like due to the characteristics of small size, high integration level, self-luminous and the like of a Micro LED chip.
The digital display driving mode of Micro LEDs generally sends n bit gray scale data into a pixel driving circuit one by one, adopts n subframes to refresh and display, and realizes 2 n bit display gray scale by using a pulse width modulation mode. Assume that the lighting duration of the first subframe is t0, the lighting duration of the second subframe is 2×to, the lighting duration of the third subframe is 2 2 ×t0, and so on, and the lighting duration of the nth subframe is 2: 2 n-1 ×t0. When the gray scale precision is higher, the unfolding time of the low gray scale is shorter, and under the condition of shorter time, the problems of short holding time, abnormal sampling and the like often occur.
Disclosure of Invention
Based on this, it is necessary to provide a pixel driving device and a pixel driving method in order to solve the above-described problems.
A pixel driving apparatus for realizing n-bit gray scale display of a pixel unit, the pixel driving apparatus comprising:
The first driving unit is connected with the pixel unit and is used for sequentially transmitting the a-bit gray-scale data to the pixel unit in a display period;
The second driving unit is connected with the pixel unit and is used for sequentially transmitting the b-bit gray scale data to the pixel unit in the display period;
the first current source is connected with the pixel unit and provides a first driving current for the pixel unit, and the first driving current is a current corresponding to high gray scale;
The second current source is connected with the pixel unit and provides a second driving current for the pixel unit, and the second driving current is a current corresponding to low gray scale;
Wherein the first driving current is greater than the second driving current, a+b=n, wherein a, b, n are positive integers.
In one embodiment, the a-bit gray-scale data is a-bit data arranged at a higher level in the n-bit gray-scale data, and the b-bit gray-scale data is b-bit data arranged at a lower level in the n-bit gray-scale data.
In one embodiment, a=b.
In one embodiment, the first driving current and the second driving current satisfy the following relation:
Ib＝Ia/2a
Wherein I b represents the second drive current, and I a represents the first drive current.
In one embodiment, the first driving unit includes a first data driving unit and a first pixel driving unit, and the first pixel driving unit is connected to the first data driving unit, the first current source, and the pixel unit, respectively;
The first data driving unit transmits corresponding gray-scale data to the first pixel driving unit under the action of a driving signal, and the first pixel driving unit controls the connection of the first current source and the pixel unit under the driving of the gray-scale data.
In one embodiment, the second driving unit includes a second data driving unit and a second pixel driving unit, and the second pixel driving unit is connected to the second data driving unit, the second current source, and the pixel unit, respectively;
The second data driving unit transmits corresponding gray-scale data to the second pixel driving unit under the action of a driving signal, and the second pixel driving unit controls the connection of the second current source and the pixel unit under the driving of the gray-scale data.
In one embodiment, the first data driving unit is connected with a first data line and a first driving signal line, the first data line is connected with corresponding gray scale data, and the first driving signal line is connected with a driving signal;
The second data driving unit is connected with a second data line and a second driving signal line, the second data line is connected with corresponding gray scale data, and the second driving signal line is connected with a driving signal.
In one embodiment, the first driving signal line is connected to the second driving signal line.
In one embodiment, the first data driving unit, the first pixel driving unit, the second data driving unit and the second pixel driving unit are driving switch tubes.
A pixel driving method, utilize the above-mentioned pixel driving device to realize the gray scale display of n bits of the pixel unit; the pixel driving method includes: in the same period of the display period,
The first driving unit is controlled to sequentially transmit a-bit gray scale data to the pixel unit, and a first driving current is provided for the pixel unit through the first current source, wherein the first driving current is a current corresponding to high gray scale;
Simultaneously controlling the second driving unit to sequentially transmit b-bit gray scale data to the pixel unit, and providing a second driving current for the pixel unit through the second current source, wherein the second driving current is a current corresponding to low gray scale;
Wherein the first driving current is greater than the second driving current, a+b=n, wherein a, b, n are positive integers.
The pixel driving device and the pixel driving method are characterized in that the same pixel unit is provided with two sets of driving units and current sources, namely a first driving unit and a first current source, a second driving unit and a second current source, n-bit gray scale data are split into a-bit gray scale data and b-bit gray scale data, the a-bit gray scale data are transmitted to the pixel unit under the action of the first driving unit, a first driving current is provided to the pixel unit through the first current source, b-bit gray scale data are synchronously transmitted to the pixel unit under the action of the second driving unit, and a second driving current is provided to the pixel unit through the second current source, wherein the first driving current is a current corresponding to a high gray scale, and the second driving current is a current corresponding to a low gray scale.
Therefore, one frame period comprises a subframe or b subframes, less than n subframes, one frame period is fixed, the number of subframes is reduced, and each subframe period is prolonged, so that the lighting time of each subframe is prolonged, the low gray scale unfolding time is prolonged, and the accurate low gray scale display is facilitated. Meanwhile, a first driving current corresponding to a high gray level and a second driving current corresponding to a low gray level are arranged in each subframe period, and the display brightness of each subframe is enhanced through superposition display of the high gray level and the low gray level, so that the display effect of one frame of data is ensured to reach the n-bit gray level display effect in the traditional technology.
Drawings
Fig. 1 is a schematic structural diagram of a pixel driving device according to an embodiment of the application;
fig. 2 is a schematic structural diagram of a pixel driving device according to an embodiment of the application;
Fig. 3 is a schematic structural diagram of a pixel driving device according to an embodiment of the application.
Reference numerals illustrate:
100. A pixel unit; 110. a first driving unit; 111. a first data driving unit; 112. a first pixel driving unit; 113. a first data line; 114. a first driving signal line; 120. a first current source; 210. a second driving unit; 211. a second data driving unit; 212. a second pixel driving unit; 213. a second data line; 214. a second driving signal line; 220. and a second current source.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
As described in the background art, the digital display driving mode of the Micro LED generally sends n bit gray scale data into the pixel driving circuit one by one, adopts n subframes to refresh and display, and uses the pulse width modulation mode to realize 2 n bits of gray scale display. Assume that the lighting duration of the first subframe is t0, the lighting duration of the second subframe is 2×to, the lighting duration of the third subframe is 2 2 ×t0, and so on, and the lighting duration of the nth subframe is 2: 2 n-1 ×t0. When the gray scale accuracy is high, the low gray scale development time is short, for example, when n=16 is adopted for gray scale development, the low gray scale development time is short, and problems such as short holding time and abnormal sampling of the low gray scale display often occur under the condition that the development time is short due to rising edges and falling edges of the driving waveform.
In order to solve the above-described problems, the present application provides a pixel driving apparatus and a pixel driving method.
In one embodiment, a pixel driving apparatus is provided for implementing n-bit gray scale display of a pixel cell.
In the conventional technology, n bits of gray-scale data are often sequentially transmitted to the same pixel unit, so as to realize the display of n subframes, and meanwhile, the lighting duration of each subframe is controlled, so as to realize the n bits of gray-scale display of the pixel unit. The larger the value of n is, the more the number of subframes is, the higher the accuracy of gray scale is, and the lighting duration of each subframe is an increasing trend. In practical applications, when the accuracy of gray scale reaches a certain level, the display duration of the first few lit subframes is often short, that is, the low gray scale development time is short, so that the problems of short holding time, abnormal sampling and the like are caused, for example, when n is greater than or equal to 16, the problems are caused. In this embodiment, n=16 is taken as an example for explanation.
Referring to fig. 1, the pixel driving apparatus provided in the present embodiment includes a first driving unit 110, a second driving unit 210, a first current source 120, and a second current source 220.
Specifically, the first driving unit 110 is connected to the pixel unit 100, and is configured to sequentially transmit the a-bit gray scale data to the pixel unit 100 in the display period. The second driving unit 210 is connected to the pixel unit 100, and is used for sequentially transmitting the b-bit gray-scale data to the pixel unit 100 in the display period. The first current source 120 is connected to the pixel unit 100 and is configured to provide a first driving current, where the first driving current is a current corresponding to a high gray level. The second current source 220 is connected to the pixel unit 100 and is used for providing a second driving current, which is a current corresponding to a low gray level. Wherein the first driving current is greater than the second driving current, a+b=n, wherein a, b, n are positive integers.
The display period refers to a display period of one frame of data, where the one frame of data includes n bits of gray-scale data, in this embodiment, the n bits of gray-scale data are split into a bits of gray-scale data and b bits of gray-scale data, and the a bits of gray-scale data are sequentially transmitted to the pixel unit 100 through the first driving unit 110, and the b bits of gray-scale data are sequentially transmitted to the pixel unit 100 through the second driving unit 210, that is, in the same subframe period, the pixel unit 100 receives two gray-scale data at the same time, and performs synchronous driving display under the driving effect of the first driving current and the second driving current.
In the conventional technology, a frame period includes n sub-frame periods, in this embodiment, n is split into a and b, and two sets of driving units and current sources are configured corresponding to the same pixel unit, namely, a first driving unit and a first current source, and a second driving unit and a second current source, n bit gray scale data are split into a bit gray scale data and b bit gray scale data, and under the action of the first driving unit, a bit gray scale data are transmitted to the pixel unit, and a first driving current is provided to the pixel unit through the first current source, and synchronously, b bit gray scale data are transmitted to the pixel unit under the action of the second driving unit, and a second driving current is provided to the pixel unit through the second current source, wherein the first driving current is a current corresponding to a high gray scale, and the second driving current is a current corresponding to a low gray scale.
In this embodiment, a frame period includes a subframes or b subframes, which are less than n subframes. One frame period is fixed, the number of subframes is reduced, and each subframe period is prolonged, so that the lighting time of each subframe is prolonged, the low gray scale unfolding time is prolonged, and the accurate low gray scale display is facilitated. Meanwhile, a first driving current corresponding to a high gray level and a second driving current corresponding to a low gray level are configured in each subframe period, and the display brightness of each subframe is enhanced through superposition display of the high gray level and the low gray level, so that the display effect of one frame of data is ensured to reach the n-bit gray level display effect in the traditional technology.
In the first sub-frame period, the first driving unit 110 transmits the 1 st bit of the a-bit gray scale data to the pixel unit 100, and the second driving unit 210 transmits the 1 st bit of the b-bit gray scale data to the pixel unit 100; in the next sub-frame period, the first driving unit 110 transmits the 2 nd gray-scale data of the a-bit gray-scale data to the pixel unit 100, and the second driving unit 210 transmits the 2 nd gray-scale data of the b-bit gray-scale data to the pixel unit 100; and so on until the first driving unit 110 transmits the a-th bit gray scale data to the pixel unit 100, and the second driving unit 210 transmits the b-th bit gray scale data to the pixel unit 100. Since a and b are not necessarily equal, the number of subframes is a larger value among a and b.
Assume that the lighting duration of the first subframe is t0, the lighting duration of the second subframe is 2×to, the lighting duration of the third subframe is 2 2 ×t0, and so on, and the lighting duration of the i-th subframe is 2: 2 i-1 ×t0. That is, the lighting period of the a-th subframe is 2 a-1 ×t0, and the lighting period of the b-th subframe is 2 b-1 ×t0.
In one embodiment, the a-bit gray scale data is a-bit data arranged at the upper position in the n-bit gray scale data, and the b-bit gray scale data is b-bit data arranged at the lower position in the n-bit gray scale data. Let n=16, n bits of gray-scale data 1011101010101110; for example, a=10, b=6, a-bit gray-scale data is the data 1011101010 of the upper 10 bits, and b-bit gray-scale data is the data 101110 of the lower 6 bits; for another example, a=b=8, the a-bit gray-scale data is the upper 8-bit data 10111010, and the b-bit gray-scale data is the lower 8-bit data 10101110; for another example, a=6, b=10, a-bit gray-scale data is the upper 6-bit data 101110, and b-bit gray-scale data is the lower 10-bit data 1010101110. In practical application, the n-bit gray-scale data may be divided at different positions according to practical situations, which is not particularly limited herein.
In one embodiment, a=b. When a=b, the number of subframes is reduced to half of the original, i.e., n/2, and each subframe period corresponds to an increase of twice the original. Taking a refresh rate of 100hz and n=16 as an example, in the conventional scheme, the display period of one frame is 1/100hz, namely 10ms, one subframe period is 10/16, namely 0.625ms, and the lighting duration (namely the shortest lighting duration) of the first subframe is 0.625/2 16-1, namely 19ns; in the present embodiment, the display period of one frame is still 10ms, and since one frame is divided into 8 subframes, i.e., one subframe period is 10/8, i.e., 1.25ms, the lighting duration (i.e., the shortest lighting duration) of the first subframe is 1.25/2 8-1, i.e., 9.8 μs. It can be seen that when a=b, the shortest lighting duration is increased to the greatest extent, which is effective for low gray scale development.
In one embodiment, the first driving current and the second driving current satisfy the following relation:
Ib＝Ia/2a
wherein I b represents the second drive current, and I a represents the first drive current.
The pixel unit 100 can realize high gray scale display under the driving of the first driving current, the pixel unit 100 can realize low gray scale display under the driving of the second driving current, and the pixel unit can realize mixed display of high gray scale and low gray scale under the synchronous driving of the first driving current and the second driving current. By setting the values of the first driving current and the second driving current to satisfy the above-mentioned correspondence relationship, the display brightness of the pixel unit 100 can be improved to a corresponding degree in the same subframe, and in the same subframe, the lowest display brightness corresponding to the first driving current corresponds to the highest display brightness corresponding to the second driving current, so that the n-bit gray scale display effect can be satisfied even in the case that the number of subframes becomes smaller.
Referring to fig. 2, in one embodiment, the first driving unit 110 includes a first data driving unit 111 and a first pixel driving unit 112, and the first pixel driving unit 112 is connected to the first data driving unit 111, the first current source 120, and the pixel unit 100, respectively. The first data driving unit 111 transmits corresponding gray-scale data to the first pixel driving unit 112 under the action of the driving signal, and the first pixel driving unit 112 controls the connection of the first current source 120 and the pixel unit 100 under the driving of the gray-scale data.
That is, the first data driving unit 111 is configured to receive a driving signal, and transmit corresponding gray-scale data to the first pixel driving unit 112 in response to the driving signal, where the gray-scale data may be 0 or 1, and the first pixel driving unit 112 may control on or off between the first current source 120 and the pixel unit 100 according to the actually received gray-scale data, where the on is that a first driving current provided by the first current source is transmitted to the pixel unit to drive the pixel unit 100 to emit light, and the off extinguishes the pixel unit 100.
The first data driving unit 111 may be connected to a first data line 113 and a first driving signal line 114, where the first data line 113 is used for accessing corresponding gray-scale data, and the first driving signal line 114 is used for accessing driving signals. When the first driving signal line 114 receives the driving signal, the first data line 113 and the first pixel driving unit 112 may be turned on, the gray-scale data received by the first data line 113 may be transmitted to the first pixel driving unit 112, or the connection between the first data line 113 and the first pixel driving unit 112 may be turned off.
Referring to fig. 2, in one embodiment, the second driving unit 210 includes a second data driving unit 211 and a second pixel driving unit 212, and the second pixel driving unit 212 is connected to the second data driving unit 211, the second current source 220, and the pixel unit 100, respectively. The second data driving unit 211 transmits corresponding gray-scale data to the second pixel driving unit 212 under the action of the driving signal, and the second pixel driving unit 212 controls the connection of the second current source 220 and the pixel unit 100 under the driving of the gray-scale data.
That is, the second data driving unit 211 is configured to receive a driving signal, and transmit corresponding gray-scale data to the second pixel driving unit 212 in response to the driving signal, where the gray-scale data may be 0 or 1, and the second pixel driving unit 212 may control on or off between the second current source 220 and the pixel unit 100 according to the actually received gray-scale data, and the on is that the second driving current provided by the second current source is transmitted to the pixel unit to drive the pixel unit 100 to emit light, and the off extinguishes the pixel unit 100.
The second data driving unit 211 may be connected to a second data line 213 and a second driving signal line 214, the second data line 213 being used to access corresponding gray-scale data, and the second driving signal line 214 being used to access driving signals. When the second driving signal line 214 receives the driving signal, the second data line 213 and the second pixel driving unit 212 may be turned on, the gray-scale data received by the second data line 213 may be transferred to the second pixel driving unit 212, or the connection between the second data line 213 and the second pixel driving unit 212 may be turned off.
For example, the gray-scale data 0 is sent to the first pixel driving unit, the first current source is disconnected from the pixel unit, and the gray-scale data 1 is sent to the second pixel driving unit, and the second current source is connected to the pixel unit, that is, the pixel unit is driven to emit light by the second driving current; or, sending the gray-scale data 1 to the first pixel driving unit, wherein the first current source is connected with the pixel unit, and simultaneously, sending the gray-scale data 0 to the second pixel driving unit, wherein the second current source is disconnected with the pixel unit, namely, the pixel unit is driven to emit light through the first driving current; or, sending the gray-scale data 1 to a first pixel driving unit, wherein the first current source is connected with the pixel unit, and simultaneously, sending the gray-scale data 1 to a second pixel driving unit, wherein the second current source is connected with the pixel unit, namely, the pixel unit is driven to emit light by the driving current after the first driving current and the second driving current are overlapped; or, the gray-scale data 0 is sent to the first pixel driving unit, the first current source is disconnected from the pixel unit, and meanwhile, the gray-scale data 0 is sent to the second pixel driving unit, and the second current source is disconnected from the pixel unit, namely, the pixel unit is extinguished.
In one embodiment, the first drive signal line 114 is connected to the second drive signal line 214. That is, the driving signals can be simultaneously supplied to the first data driving unit 111 and the second data driving unit 211, whereby the circuit structure can be simplified, the wiring space can be reduced, the cost can be reduced, and simultaneously, the input of the a-bit gray scale data and the b-bit gray scale data can be conveniently and synchronously controlled.
Referring to fig. 3, in one embodiment, the first data driving unit 111, the first pixel driving unit 112, the second data driving unit 211, and the second pixel driving unit 212 are driving switching transistors. For example, NMOSFET (N-type Metal-Oxide-Semiconductor Field-Effect Transistor) or PMOSFET (P-type Metal-Oxide-Semiconductor Field-Effect Transistor) can be selected.
In one embodiment, the pixel unit 100 may be a light emitting diode, and specifically may include an inorganic light emitting diode, an organic light emitting diode, a quantum dot light emitting diode, and the like.
In one embodiment, a pixel driving method is provided, and the pixel driving method can utilize the pixel driving device to realize n-bit gray scale display of a pixel unit.
The pixel driving method provided in this embodiment includes: in the same period of the display period,
In step S110, the first driving unit 110 is controlled to sequentially transmit the a-bit gray scale data to the pixel unit 100, and the first current source provides the first driving current for the pixel unit, wherein the first driving current is the current corresponding to the high gray scale.
In step S120, the second driving unit 210 is controlled to sequentially transmit the b-bit gray scale data to the pixel unit 100, and the second driving current is provided to the pixel unit by the second current source, wherein the second driving current is the current corresponding to the low gray scale.
Wherein the first driving current is greater than the second driving current, a+b=n, wherein a, b, n are positive integers.
In the conventional technology, a frame period includes n sub-frame periods, in this embodiment, n is split into a and b, and two sets of driving units and current sources are configured corresponding to the same pixel unit, namely, a first driving unit and a first current source, and a second driving unit and a second current source, n bit gray scale data are split into a bit gray scale data and b bit gray scale data, and under the action of the first driving unit, a bit gray scale data are transmitted to the pixel unit, and a first driving current is provided to the pixel unit through the first current source, and synchronously, b bit gray scale data are transmitted to the pixel unit under the action of the second driving unit, and a second driving current is provided to the pixel unit through the second current source, wherein the first driving current is a current corresponding to a high gray scale, and the second driving current is a current corresponding to a low gray scale.
In this embodiment, a frame period includes a subframes or b subframes, which are less than n subframes. One frame period is fixed, the number of subframes is reduced, and each subframe period is prolonged, so that the lighting time of each subframe is prolonged, the low gray scale unfolding time is prolonged, and the accurate low gray scale display is facilitated. Meanwhile, a first driving current corresponding to a high gray level and a second driving current corresponding to a low gray level are configured in each subframe period, and the display brightness of each subframe is enhanced through superposition display of the high gray level and the low gray level, so that the display effect of one frame of data is ensured to reach the n-bit gray level display effect in the traditional technology.
In one embodiment, the a-bit gray scale data is a-bit data arranged at the upper position in the n-bit gray scale data, and the b-bit gray scale data is b-bit data arranged at the lower position in the n-bit gray scale data.
In one embodiment, a=b.
In one embodiment, the first driving current and the second driving current satisfy the following relation:
Ib＝Ia/2a
wherein I b represents the second drive current, and I a represents the first drive current.
In one embodiment, the first driving unit 110 includes a first data driving unit 111 and a first pixel driving unit 112, and the first pixel driving unit 112 is connected to the first data driving unit 111, the first current source 120 and the pixel unit 100, respectively.
In step S110, the first data driving unit 111 transmits corresponding gray-scale data to the first pixel driving unit 112 under the action of the driving signal, and the first pixel driving unit 112 controls the connection of the first current source 120 and the pixel unit 100 under the driving of the gray-scale data.
In one embodiment, the second driving unit 210 includes a second data driving unit 211 and a second pixel driving unit 212, and the second pixel driving unit 212 is connected to the second data driving unit 211, the second current source 220, and the pixel unit 100, respectively.
In step S120, the second data driving unit 211 transmits corresponding gray-scale data to the second pixel driving unit 212 under the action of the driving signal, and the second pixel driving unit 212 controls the connection of the second current source 220 and the pixel unit 100 under the driving of the gray-scale data.
In one embodiment, the first drive signal line 114 is connected to the second drive signal line 214.
In one embodiment, the first data driving unit 111, the first pixel driving unit 112, the second data driving unit 211 and the second pixel driving unit 212 are driving switch transistors.
The pixel driving method provided in this embodiment and the pixel driving device provided in the previous embodiment belong to the same inventive concept, and the specific content of the pixel driving method provided in this embodiment can be referred to the related description of the pixel driving device, and will not be repeated here.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (8)
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| CN115050317B (en) * | 2022-07-15 | 2023-03-21 | 惠科股份有限公司 | Data driving circuit, display module and method for outputting driving signal |
| CN116092422A (en) * | 2023-01-26 | 2023-05-09 | 彩山微电子(苏州)有限公司 | Display driving method and storage medium |
| CN119229796B (en) * | 2024-11-29 | 2025-02-07 | 北京数字光芯集成电路设计有限公司 | Micro-LED display chip, pixel driving method suitable for Micro-LED display chip and electronic equipment |
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| CN107205293A (en) * | 2016-03-18 | 2017-09-26 | 明阳半导体股份有限公司 | Light emitting diode driving circuit and method |
| CN216671170U (en) * | 2021-12-09 | 2022-06-03 | 深圳市奥视微科技有限公司 | Pixel driving device |
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| KR20150137241A (en) * | 2014-05-28 | 2015-12-09 | 삼성디스플레이 주식회사 | Pixel, display device comprising the same and driving method thereof |
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| CN107205293A (en) * | 2016-03-18 | 2017-09-26 | 明阳半导体股份有限公司 | Light emitting diode driving circuit and method |
| CN216671170U (en) * | 2021-12-09 | 2022-06-03 | 深圳市奥视微科技有限公司 | Pixel driving device |
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