CN115331641A - Temperature compensation circuit of display device and display device - Google Patents
Temperature compensation circuit of display device and display device Download PDFInfo
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- CN115331641A CN115331641A CN202210944803.7A CN202210944803A CN115331641A CN 115331641 A CN115331641 A CN 115331641A CN 202210944803 A CN202210944803 A CN 202210944803A CN 115331641 A CN115331641 A CN 115331641A
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
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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]
- G09G3/3208—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] organic, e.g. using organic light-emitting diodes [OLED]
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/041—Temperature compensation
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Abstract
The invention discloses a temperature compensation circuit of display equipment and the display equipment, wherein the display equipment comprises a display area, and the temperature compensation circuit comprises: the temperature sensing units are used for sensing the temperature of the corresponding display sub-regions to generate temperature feedback signals; the compensation control module is coupled with the plurality of temperature sensing units and the plurality of common voltage blocks, receives a plurality of temperature feedback signals generated by the plurality of temperature sensing units, generates a plurality of corresponding common voltages according to the plurality of temperature feedback signals, and respectively provides the plurality of common voltages to the corresponding common voltage blocks; the plurality of common voltages are respectively obtained according to corresponding temperature feedback signals so as to independently compensate each display sub-area of the display area.
Description
Technical Field
The invention relates to the technical field of display, in particular to a temperature compensation circuit of display equipment and the display equipment.
Background
In recent years, an OLED (Organic Light-Emitting Diode) display device has become one of the mainstream display devices due to its advantages of self-luminescence, small thickness, low power, fast response speed, low manufacturing cost, and the like. The OLED display device includes a substrate on which an organic light emitting unit including pixel circuits, an anode, an organic light emitting layer, a cathode, and the like is formed, and the anode and the cathode are led out at a non-light emitting region by a lead wire and bound to an integrated Circuit or an FPC (Flexible Printed Circuit).
Both OLED display devices and Micro OLED display devices have non-uniform temperature distribution under the influence of factors such as display frames or peripheral circuits, which may cause non-uniform visual effect brightness and further cause display frame abnormality, or may cause product degradation and aging under the condition of long-term operation with non-uniform temperature, so that a temperature compensation circuit needs to be added to the OLED display devices.
In a conventional scheme, the temperature compensation circuit includes a plurality of temperature sensing units disposed in the display region, each of the temperature sensing units generates a corresponding temperature feedback signal according to a temperature of a different region of the display region, and the compensation control module generates a compensated common voltage VCOM according to the plurality of temperature feedback signals and provides the compensated common voltage VCOM to a cathode of the LED lamp. As shown in fig. 1, fig. 1 is a schematic block diagram showing a temperature compensation circuit of a display device according to the related art. The display device includes a display area (not shown) and a temperature compensation circuit 200. The temperature compensation circuit 200 includes a common voltage circuit 201, a control unit 203, a voltage generation unit 204, and temperature sensing units T1 to T6. The display region includes a display array, and the temperature sensing units T1 to T6 are disposed in the display region and symmetrically disposed around the display array. The temperature sensing unit is selected from temperature sensors, for example.
Specifically, the display device includes, for example, a silicon substrate on which an organic light emitting unit composed of layers of the common voltage circuit 201, an anode back plate (not shown), a pixel circuit (not shown), an organic light emitting layer (not shown), and the like is formed.
Each temperature sensing unit generates a corresponding temperature feedback signal Vfb1 to Vfb6 according to the temperature of the portion, and provides the temperature feedback signals Vfb1 to Vfb6 to the control unit 203.
The control unit 203 receives the plurality of temperature feedback signals Vfb1 to Vfb6, performs a weighting operation on the plurality of temperature feedback signals Vfb1 to Vfb6, and generates a control signal according to the operation result.
The voltage generating unit 204 is coupled to the control unit 203, receives the control signal, generates a compensated common voltage VCOM according to the control signal, and provides the common voltage VCOM to the common voltage circuit 201 to perform temperature compensation on the display region.
The temperature compensation circuit of the prior art can only generate one common voltage VCOM, and when the temperature of each portion of the display region is close, the compensated common voltage VCOM required by each portion is also relatively close, so that the temperature compensation circuit of the prior art can meet the requirement of temperature compensation. However, when the temperature of each portion of the display area is different and the temperature feedback signals generated by each temperature sensing unit are different, the control unit 203 can only perform weighting operation on the plurality of temperature feedback signals to generate the common voltage VCOM having the compensation effect within the acceptable range for all portions under the current condition. However, when the same common voltage VCOM is used to perform temperature compensation on different portions with different temperatures, the temperature compensation effect of each region is uneven, resulting in poor visual effect in practical applications.
Therefore, an improved display device and a temperature compensation circuit thereof are desired to solve the above problems and improve the reliability of the display device.
Disclosure of Invention
In view of the foregoing problems, it is an object of the present invention to provide a temperature compensation circuit for a display device and a display device, so as to perform regional compensation for temperature differences of different regions of the display device, thereby obtaining better display effect and improving the degradation and aging problem caused by regional display.
According to an aspect of the present application, there is provided a temperature compensation circuit of a display device including a display area, the temperature compensation circuit including: the temperature sensing units are used for sensing the temperature of the corresponding display sub-regions to generate temperature feedback signals; the compensation control module is coupled with the plurality of temperature sensing units and the plurality of common voltage blocks, receives a plurality of temperature feedback signals generated by the plurality of temperature sensing units, generates a plurality of corresponding common voltages according to the plurality of temperature feedback signals, and respectively provides the plurality of common voltages to the corresponding common voltage blocks; the plurality of common voltages are respectively obtained according to corresponding temperature feedback signals so as to independently compensate each display sub-area of the display area.
Optionally, the compensation control module comprises: the control unit is coupled with the plurality of temperature sensing units and generates a control signal according to the received plurality of temperature feedback signals; and the voltage generating unit is coupled with the control unit, generates a plurality of common voltages corresponding to the temperature feedback signals according to the received control signal, and provides the common voltages to the corresponding common voltage blocks.
Optionally, the compensation control module comprises: a control unit coupled to the plurality of temperature sensing units, generating a lookup signal including a temperature parameter according to the received plurality of temperature feedback signals, and generating a control signal; the compensation unit is coupled with the control unit and stores a mapping table representing the corresponding relation between the temperature parameter and the setting parameter of the public voltage, and the compensation unit generates the corresponding setting parameter according to the temperature parameter in the received search signal; the voltage generation unit is coupled with the control unit, receives the control signal, generates a plurality of corresponding public voltages and provides the public voltages to the corresponding public voltage blocks; wherein the control unit generates the control signal according to the setting parameter provided by the compensation unit.
Optionally, the compensation unit is further configured to calculate a setting parameter of the corresponding common voltage according to the temperature parameter.
Optionally, the compensation control module is configured to provide a positive correlation between the temperature represented by the received temperature feedback signal and the common voltage provided corresponding to the temperature feedback signal.
Optionally, the temperature feedback signal generated by the temperature sensing unit includes a temperature feedback signal corresponding to a temperature of the display sub-region; the compensation control module is configured to generate a corresponding common voltage according to the temperature feedback signal and provide the common voltage to the corresponding common voltage block.
Optionally, the temperature feedback signal generated by the temperature sensing unit includes a plurality of temperature feedback signals corresponding to a plurality of temperatures of the display sub-region; the compensation control module is configured to generate a corresponding common voltage according to an average value of the plurality of temperature feedback signals and provide the common voltage to the corresponding common voltage block.
Optionally, each temperature sensing unit is configured to generate the temperature feedback signal according to an average value of at least one temperature of the display sub-region.
Optionally, the temperature compensation circuit includes six temperature sensing units disposed around the display array in the display area, and senses the temperature of the corresponding display sub-area to generate the temperature feedback signal.
According to another aspect of the present application, there is provided a display apparatus including: a temperature compensation circuit as described in any of the above; a display area having a plurality of display sub-areas.
Optionally, the display area includes a display array, and the temperature sensing unit of the temperature compensation circuit is disposed around the display array.
Optionally, the display array is selected from an LCD display array, an LED display array, an OLED display array, an AMOLED display array, a Micro OLED display array, a Micro LED display array, or a Mini LED display array.
The application provides a temperature compensation circuit of display device, divide into M public voltage blocks with the public voltage backplate, the control unit is responsible for receiving a plurality of temperature feedback signals that a plurality of temperature sensing units provided, and independently calculate according to a plurality of temperature feedback signals, control voltage generation unit output selected at least N group public voltage, provide corresponding public voltage block respectively, thereby independently carry out temperature compensation to each display subregion according to a plurality of public voltage blocks of cutting into the block, obtain more accurate visual effect brightness compensation.
Optionally, the temperature compensation circuit can adjust the common voltage according to the regional bright state and dark state contents of the display picture, and the power consumption of the display device can be reduced.
Optionally, the compensation control module further includes a compensation unit storing a mapping table, the mapping table indicates a corresponding relationship between the temperature parameter and the setting parameter of the common voltage, after the control unit receives the plurality of temperature feedback signals, the temperature parameter therein is sent to the compensation unit, the setting parameter of the corresponding common voltage is directly found from the mapping table, the control unit provides the setting parameter to the voltage generation unit, the corresponding setting parameter does not need to be obtained through calculation according to the plurality of temperature feedback signals, the consumed resources are less, the response time is shorter, and therefore temperature compensation can be performed on the display device more quickly.
Optionally, the compensation unit is further configured with a calculation function, capable of calculating a setting parameter of the common voltage according to the temperature parameter, and storing the temperature parameter and the setting parameter in the mapping table. On one hand, an original mapping table can be constructed through a large number of tests before the factory is delivered, and the original mapping table is suitable for all display devices in the same batch. On the other hand, in the actual use process, when the temperature parameter which is not included in the mapping table is encountered, the setting parameter of the corresponding public voltage can be calculated, and meanwhile, the original mapping table is further supplemented, so that the temperature compensation circuit is ensured to have better adaptability.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram showing a temperature compensation circuit of a display device according to the related art;
fig. 2 is a schematic structural diagram showing a temperature compensation circuit of a display device according to an embodiment of the present invention;
fig. 3 is a schematic block diagram showing a temperature compensation circuit of a display device according to another embodiment of the present invention;
fig. 4 shows a schematic configuration diagram of a display device according to an embodiment of the present invention.
Detailed Description
Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. In the various figures, identical components or modules are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.
It should be understood that in the following description, "circuitry" may include singly or in combination hardwired circuitry, programmable circuitry, state machine circuitry, and/or components capable of storing instructions executed by programmable circuitry. When a component or circuit is referred to as being "connected to" another component or circuit is referred to as being "connected between" two nodes, it can be directly coupled or connected to the other component or intervening components may be present, and the connection between the components may be physical, logical, or a combination thereof. In contrast, when an element is referred to as being "directly coupled" or "directly connected" to another element, it is intended that the two be absent intermediate elements.
Also, certain terms are used throughout the description and claims to refer to particular components. As one of ordinary skill in the art will appreciate, manufacturers may refer to a component by different names. This patent specification and claims do not intend to distinguish between components that differ in name but not function.
Moreover, it is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The present application provides an improved temperature compensation circuit, as shown in fig. 2. Fig. 2 is a schematic structural view illustrating a temperature compensation circuit of a display device according to an embodiment of the present invention, and the anode back plate and the like are not shown for convenience of description. The display device includes a display area divided into a plurality of display sub-areas, and the temperature compensation circuit 300 includes a compensation control module 302, a plurality of temperature sensing units corresponding to the number of common voltage blocks, and a plurality of common voltage blocks. It should be understood that in some embodiments, the number of temperature sensing units may not correspond to the number of common voltage blocks, for example, eight temperature sensing units and four common voltage blocks are included.
In the present embodiment, the display device includes, for example, a silicon substrate on which an organic light emitting unit composed of a plurality of layers of a common voltage block, an anode back plate (not shown), a pixel circuit (not shown), an organic light emitting layer (not shown), and the like is formed.
The temperature compensation circuit 300 includes six common voltage blocks, i.e., common voltage blocks VCOM1 to VCOM6, corresponding to six display sub-regions of the display region one to one. The six common voltage blocks are arranged in a 2 x 3 array, and it can be understood that one complete common voltage circuit 201 in fig. 1 is divided into 6 independent common voltage blocks.
The temperature compensation circuit 300 further includes six temperature sensing units, i.e., temperature sensing units T1 to T6. The display region includes a display array, and the temperature sensing units T1 to T6 are disposed in the display region and disposed around the display array in one-to-one correspondence with the common voltage blocks VCOM1 to VCOM6. The temperature sensing units T1 to T6 respectively generate temperature feedback signals Vfb1 to Vfb6 according to the temperatures of the corresponding display sub-regions.
The compensation control module 302 receives the temperature feedback signals Vfb1 to Vfb6, generates corresponding compensated common voltages according to the temperature feedback signals Vfb1 to Vfb6 generated by the temperature sensing units T1 to T6, and provides the common voltages to the corresponding common voltage blocks VCOM1 to VCOM6.
Specifically, the compensation control module 302 includes a control unit 303 and a voltage generation unit 304, wherein the control unit 303 is coupled to the temperature sensing units T1 to T6, receives the temperature feedback signals Vfb1 to Vfb6, independently operates according to the temperature feedback signals Vfb1 to Vfb6, and generates control signals, and the voltage generation unit 304 receives the control signals and provides corresponding 6 compensated common voltages VCOM according to the control signals, which are respectively provided to the common voltage VCOM blocks VCOM1 to VCOM6 for temperature compensation. It should be understood that the common voltage VCOM may be any voltage value, similar to an analog signal.
The temperature compensation circuit of the display device according to this embodiment divides the common voltage backplane into M common voltage blocks, the control unit 303 is responsible for receiving the temperature feedback signals Vfb1 to Vfb6 provided by the temperature sensing units, and independently operates according to the temperature feedback signals Vfb1 to Vfb6, and the control voltage generation unit 304 outputs six selected common voltages VCOM, which are respectively provided to the common voltage blocks VCOM1 to VCOM6, so as to independently perform temperature compensation on each display sub-region according to the common voltage blocks VCOM1 to VCOM6 divided into blocks, thereby obtaining more accurate apparent brightness compensation.
In a possible embodiment, each display sub-region corresponds to a plurality of temperature sensing units, that is, each common voltage block corresponds to a plurality of temperature sensing units, each temperature sensing unit generates a corresponding temperature feedback signal according to the sensed temperature of the display sub-region, and at this time, each display sub-region corresponds to a plurality of temperature feedback signals, and the control unit 303 generates a corresponding common voltage VCOM according to an average value of the plurality of temperature feedback signals.
In another possible embodiment, the temperature sensing units T1 to T6 can respectively sense temperature values of a plurality of sensing points in the corresponding display sub-area, and generate corresponding temperature feedback signals Vfb1 to Vfb6 according to an average value of the temperature values.
For example, when the brightness of the display sub-regions corresponding to the common voltage blocks VCOM1, VCOM2, VCOM4, and VCOM5 is overall high or bright-state detail is abundant, and the brightness of the display sub-regions corresponding to the common voltage blocks VCOM3 and VCOM6 is overall low or dark-state detail is abundant, the temperature sensed by the temperature sensing units T3 and T6 is lower than that of the other temperature sensing units, and the voltage generating unit 304 provides the voltage to the common voltage blocks VCOM3 and VCOM6 under the control of the control unit 303 to perform independent compensation on each display sub-region, so as to obtain better visual effect.
Illustratively, the Display array is selected from, for example, an LCD (Liquid Crystal Display), an LED (Light Emitting Diode) Display array, an OLED (Organic Light-Emitting semiconductor) Display array, an AMOLED (Active-Matrix Organic Light Emitting Diode) Display array, a Micro OLED Display array, a Micro LED Display array, or a Mini LED Display array. Wherein the Micro OLED display array is selected from, for example, silicon-based OLEDs.
Optionally, the present application also provides another improved temperature compensation circuit, as shown in fig. 3. Fig. 3 is a schematic structural view showing a temperature compensation circuit of a display device according to another embodiment of the present invention, and the structure of an anode back plate and the like is not shown for convenience of description. The display device includes a display area including a plurality of display sub-areas, and the temperature compensation circuit 400 includes a compensation control module 402, a plurality of temperature sensing units corresponding to the number of common voltage blocks, and a plurality of common voltage blocks corresponding to the plurality of display sub-areas one to one. The common voltage block and the temperature sensing unit are similar to the temperature compensation circuit 300 described in fig. 2, and are not described herein again, and the compensation control module 402 is mainly described below.
The compensation control module 402 includes a control unit 303, a voltage generation unit 304, and a compensation unit 306. The control unit 303 receives the temperature feedback signals Vfb1 to Vfb6, and generates a lookup signal according to the temperature feedback signals Vfb1 to Vfb6, wherein the lookup signal includes a plurality of temperature parameters, for example.
The compensation unit 306 stores, for example, a mapping table indicating a correspondence relationship between the temperature a parameter and the setting parameter of the common voltage VCOM. The compensation unit 306 receives the search signal, finds the corresponding setting parameter of the common voltage VCOM in the stored mapping table according to the temperature parameter in the search signal, and returns the setting parameters of the common voltages VCOM to the control unit 303. The control unit 303 generates a control signal according to the setting parameters of the common voltages VCOM and provides the control signal to the voltage generation unit 304, and the voltage generation unit 304 generates a plurality of compensated common voltages VCOM according to the control signal and provides the compensated common voltages VCOM to the common voltage blocks VCOM1 to VCOM6.
In a possible embodiment, the compensation unit 306 is further configured to calculate a setting parameter of the common voltage VCOM according to the temperature parameter, and store the temperature parameter and the setting parameter in the mapping table.
The compensation control module 402 of the temperature compensation circuit 400 provided in this embodiment further includes a compensation unit 306 storing a mapping table, and the control unit 303 can directly obtain the setting parameters of the corresponding common voltage VCOM according to the temperature feedback signals Vfb1 to Vfb6, without performing complex operations, with less resource consumption and fast response speed, thereby being capable of performing temperature compensation on the display device more quickly.
Optionally, the compensation unit 306 is further configured with a calculation function, capable of calculating a setting parameter of the common voltage VCOM according to the temperature parameter, and storing the temperature parameter and the setting parameter in the mapping table. On one hand, an original mapping table can be constructed through a large number of tests before the factory is delivered, and the original mapping table is suitable for all display devices in the same batch. On the other hand, in the actual use process, when the compensation unit receives the temperature parameter which is not included in the mapping table, the corresponding setting parameter of the common voltage VCOM can be calculated, meanwhile, the original mapping table is further supplemented, and the temperature compensation circuit is ensured to have better adaptability.
Further, the present application also provides an improved display device, as shown in fig. 4. Fig. 4 shows a schematic configuration diagram of a display device according to an embodiment of the present invention. The display device 100 includes a display area 110 and a control circuit 120, wherein the display area 110 has a plurality of display sub-areas, and the control circuit 120 includes a temperature compensation circuit selected from, for example, the temperature compensation circuit 300 shown in fig. 2 or the temperature compensation circuit 400 shown in fig. 3.
In summary, the temperature compensation circuit of the display device provided by the present application divides the common voltage backplane into M common voltage blocks, the control unit 303 is responsible for receiving the temperature feedback signals Vfb1 to Vfb6 provided by the temperature sensing units, and independently operates according to the temperature feedback signals Vfb1 to Vfb6, and the control voltage generation unit 304 outputs six selected common voltages VCOM, which are respectively provided to the common voltage blocks VCOM1 to VCOM6, so as to independently perform temperature compensation on each display sub-region according to the common voltage blocks VCOM1 to VCOM6 divided into blocks, thereby obtaining more accurate viewing effect brightness compensation.
Optionally, the compensation control module further includes a compensation unit 306 storing a mapping table, where the mapping table indicates a corresponding relationship between a temperature parameter and a setting parameter of the common voltage VCOM, after the control unit 303 receives the temperature feedback signals Vfb1 to Vfb6, the temperature parameter therein is sent to the compensation unit 306, the corresponding setting parameter of the common voltage VCOM is directly found from the mapping table, and the control unit 303 further provides the setting parameter to the voltage generation unit 304, which does not need to perform an operation according to the temperature feedback signals Vfb1 to Vfb6, and thus, the consumption of resources is less, the response time is shorter, and thus, the temperature compensation can be performed on the display device more quickly.
Optionally, the compensation unit 306 is further configured with a calculation function, capable of calculating a setting parameter of the common voltage VCOM according to the temperature parameter, and storing the temperature parameter and the setting parameter in the mapping table. On one hand, an original mapping table can be constructed through a large number of tests before the factory is delivered, and the original mapping table is suitable for all display devices in the same batch. On the other hand, in the actual use process, when the temperature parameter which is not included in the mapping table is encountered, the setting parameter of the corresponding common voltage VCOM can be calculated, and meanwhile, the original mapping table is further supplemented, so that the temperature compensation circuit is ensured to have better adaptability.
It should be noted that the words "during", "when" and "when 8230; \8230"; when used herein in relation to the operation of a circuit are not strict terms indicating an action that occurs immediately upon the start of a startup action, but rather there may be some small but reasonable delay or delays, such as various transmission delays, between it and the reaction action (action) initiated by the startup action. The words "about" or "substantially" are used herein to mean that the value of an element (element) has a parameter that is expected to be close to the stated value or position. However, as is well known in the art, there is always a slight deviation that makes it difficult for the value or position to be exactly the stated value. It has been well established in the art that a deviation of at least ten percent (10%) (at least twenty percent (20%) for semiconductor dopant concentration) is a reasonable deviation from the exact ideal target described. When used in conjunction with a signal state, the actual voltage value or logic state (e.g., "1" or "0") of the signal depends on whether positive or negative logic is used.
In accordance with embodiments of the present invention, the foregoing examples are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The scope of the invention should be determined with reference to the appended claims and their equivalents.
Claims (12)
1. A temperature compensation circuit of a display device, the display device including a display area, the temperature compensation circuit comprising:
the temperature feedback circuit comprises a plurality of common voltage blocks and a plurality of temperature sensing units, wherein the common voltage blocks correspond to a plurality of display sub-regions in the display region one to one, and each temperature sensing unit generates a temperature feedback signal by sensing the temperature of the corresponding display sub-region; and
the compensation control module is coupled with the plurality of temperature sensing units and the plurality of common voltage blocks, receives a plurality of temperature feedback signals generated by the plurality of temperature sensing units, generates a plurality of corresponding common voltages according to the plurality of temperature feedback signals, and respectively provides the plurality of common voltages to the corresponding common voltage blocks; wherein, the first and the second end of the pipe are connected with each other,
the plurality of common voltages are respectively obtained according to the corresponding temperature feedback signals so as to independently compensate each display subarea of the display area.
2. The temperature compensation circuit of claim 1, the compensation control module comprising:
the control unit is coupled with the plurality of temperature sensing units and generates a control signal according to the received plurality of temperature feedback signals;
and the voltage generating unit is coupled with the control unit, generates a plurality of common voltages corresponding to the temperature feedback signals according to the received control signal, and provides the common voltages to the corresponding common voltage blocks.
3. The temperature compensation circuit of claim 1, the compensation control module comprising:
a control unit coupled to the plurality of temperature sensing units, generating a search signal including a temperature parameter according to the received plurality of temperature feedback signals, and generating a control signal;
the compensation unit is coupled with the control unit and stores a mapping table for representing the corresponding relation between the temperature parameter and the setting parameter of the public voltage, and the compensation unit generates the corresponding setting parameter according to the temperature parameter in the received search signal;
the voltage generation unit is coupled with the control unit, receives the control signal, generates a plurality of corresponding public voltages and provides the public voltages to the corresponding public voltage blocks; wherein the content of the first and second substances,
the control unit generates the control signal according to the setting parameters provided by the compensation unit.
4. The temperature compensation circuit of claim 3, the compensation unit further configured to calculate a setting parameter of the corresponding common voltage from the temperature parameter.
5. The temperature compensation circuit of claim 1, the compensation control module configured to positively correlate a temperature represented by the received temperature feedback signal with a common voltage provided corresponding to the temperature feedback signal.
6. The temperature compensation circuit of claim 1, wherein the temperature feedback signal generated by the temperature sensing unit comprises a temperature feedback signal corresponding to a temperature of the display sub-region;
the compensation control module is configured to generate a corresponding common voltage according to the temperature feedback signal and provide the common voltage to the corresponding common voltage block.
7. The temperature compensation circuit of claim 1, wherein the temperature feedback signal generated by the temperature sensing unit comprises a plurality of temperature feedback signals corresponding to a plurality of temperatures of the display sub-region;
the compensation control module is configured to generate a corresponding common voltage according to an average value of the plurality of temperature feedback signals and provide the common voltage to the corresponding common voltage block.
8. The temperature compensation circuit of claim 1, each temperature sensing unit configured to generate the temperature feedback signal according to an average of at least one temperature of the display sub-region.
9. The temperature compensation circuit of claim 6, comprising six temperature sensing units disposed around the display array in the display area, sensing the temperature of the corresponding display sub-area to generate the temperature feedback signal.
10. A display device, the display device comprising:
a temperature compensation circuit according to any one of claims 1 to 9;
a display area having a plurality of display sub-areas.
11. The display device of claim 10, the display area comprising a display array, the temperature sensing units of the temperature compensation circuit being disposed around the display array.
12. The display device of claim 11, the display array selected from an LCD display array, an LED display array, an OLED display array, an AMOLED display array, a Micro OLED display array, a Micro LED display array, or a Mini LED display array.
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| CN202210944803.7A CN115331641A (en) | 2022-08-08 | 2022-08-08 | Temperature compensation circuit of display device and display device |
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| CN202210944803.7A CN115331641A (en) | 2022-08-08 | 2022-08-08 | Temperature compensation circuit of display device and display device |
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