CN117174026A

CN117174026A - Method for optimizing OLED production and display

Info

Publication number: CN117174026A
Application number: CN202311176219.2A
Authority: CN
Inventors: 李玥; 黄义彬; 李培煜; 黄鉴
Original assignee: Weichuang Microelectronics Shanghai Co ltd
Current assignee: Weichuang Microelectronics Shanghai Co ltd
Priority date: 2023-09-12
Filing date: 2023-09-12
Publication date: 2023-12-05

Abstract

The application provides a method for optimizing OLED production and display, which reduces gamma calibration times on a production line and optimizes production and manufacture by dividing light wave bands according to brightness intervals and adopting a PWM dimming strategy which only adjusts duty ratio and has unchanged pulse number in each light wave band; and different IR values are adopted for compensation optimization aiming at different light wave bands, so that the display effect is optimized.

Description

Method for optimizing OLED production and display

Technical Field

The application relates to the technical field of OLED (organic light emitting diode), in particular to OLED display and production and manufacturing.

Background

An OLED Organic Light-Emitting Diode (OLED) is also called an Organic laser display, an Organic Light-Emitting semiconductor. Is found in the laboratory in 1979 by professor Deng Qingyun of american chinese (child w.tang). The OLED display technology has the advantages of self-luminescence, wide viewing angle, almost infinite contrast, low power consumption, extremely high reaction speed and the like.

At present, in the prior art, when dividing light bands (bands), some special bands are often set, and the bands correspond to fixed brightness values, and as the prior art still adopts a hybrid dimming mode to perform dimming, the following technical problems still exist:

1) The dimming mode of changing the pulse number is adopted between the special bands, and the change of the pulse number easily causes screen flicker, so that the production line needs to perform gamma calibration once more, and meanwhile, the duty ratio adjusting ranges adopted by PWM dimming are different for the bands with the same pulse number, so that corresponding registers are needed to perform setting matching with the current bands, and the production line is time-consuming and production efficiency is reduced.

2) Because of the large brightness difference between different band intervals, the prior art still uses a group of IR (i-intensity, current, r-resistance) to compensate, and the display effect is poor.

Disclosure of Invention

The application aims to provide a method for optimizing OLED production and display, so that the production efficiency of the OLED is higher, and the display effect is better.

In order to achieve the above object, the present application is realized by the following technical scheme:

a method for optimizing OLED production and display is provided, comprising:

1) Dividing the screen into a plurality of light wave bands according to the maximum brightness adjusting range of the screen, wherein each light wave band corresponds to a DBV value range; each optical wave band corresponds to a PWM dimming strategy;

2) Determining the light wave band according to the current brightness adjustment range;

3) Transmitting a maximum brightness value image in an optical band to which the ddic belongs and a DBV value corresponding to the maximum brightness value image;

4) And ddic determines a PWM dimming strategy according to the light wave band, and performs dimming.

Further, the number of pulses in each PWM dimming strategy remains the same.

Further, the duty cycle adjustment range and sequence in each PWM dimming strategy remain consistent.

Further, only the duty cycle is different in each PWM dimming strategy.

Further, step 5) is further included, and DC dimming is adopted between the light wave bands.

Further, step 6) is included, wherein the same IR value is used for compensation in the optical band.

Further, in the step 6), different IR values are used for compensation for different optical bands.

Compared with the prior art, the application has the following technical effects:

1. in one band, the same data voltage is adopted, the generated currents are the same, and the voltage drops formed by the same currents are consistent.

2. Different IR values are adopted for compensation aiming at different bands, and the compensation effect is better.

3. Because the pulse number is fixed in the adopted PWM dimming, the screen flicker can not be caused, and the second gamma calibration is not needed on the production line.

4. Because the duty ratio adjustment ranges of the bands are consistent, multiple groups of register values or multiple register settings are not needed, and only one group is needed to meet the requirements.

Drawings

For a clearer description of the technical solutions of the present application, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are one embodiment of the present application, and that, without inventive effort, other drawings can be obtained by those skilled in the art from these drawings:

fig. 1 is an example of a prior art hybrid dimming;

fig. 2 is a schematic diagram of the optical band division of the present application.

Detailed Description

The following provides a further detailed description of the proposed solution of the application with reference to the accompanying drawings and detailed description. The advantages and features of the present application will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for the purpose of facilitating and clearly aiding in the description of embodiments of the application. For a better understanding of the application with objects, features and advantages, refer to the drawings. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the application to the extent that any modifications, changes in the proportions, or adjustments of the sizes of structures, proportions, or otherwise, used in the practice of the application, are included in the spirit and scope of the application which is otherwise, without departing from the spirit or essential characteristics thereof.

Fig. 1 shows an example of prior art hybrid dimming, as shown in fig. 1, in which 10 bands are divided in total, denoted as band0 to band9, in which band5 and band6 are special bands, respectively correspond to one digital luminosity value (DBV), and the remaining bands correspond to one brightness range.

When dimming is carried out between the special band5 and the special band6, the pulse number is changed, the dimming mode is extremely easy to cause the flicker of a screen, and in order to avoid the flicker of the screen, gamma calibration is required to be carried out on a production line, so that the production cost and the production time are obviously increased.

Also, in bands 1 to 5, which have the same number of pulses, due to the difference of duty ratios (duty), when adjusting gamma, a corresponding register is required to match the setting of the current band, which is obviously disadvantageous for the production line production.

And, the prior art still adopts a set of IR to compensate all the bands, and because the brightness difference is large among different bands, obviously adopts a set of IR to compensate, the effect is poor.

To solve the above problems, the present application provides a method for optimizing OLED production and display, comprising:

Optionally, the number of pulses in each PWM dimming strategy remains the same.

Optionally, the duty cycle adjustment range and sequence in each PWM dimming strategy remain the same.

Alternatively, only the duty cycle is different in each PWM dimming strategy.

Optionally, step 5) is further included, and DC dimming is adopted between the light bands.

Optionally, the same IR value is used for compensation within the optical band.

Optionally, in the step 6), different IR values are used for compensation for different optical bands.

Fig. 2 shows a schematic diagram of the optical band division according to the present application, as shown in fig. 2, when the brightness is adjusted from 700nit to 2nit, 5 bands are divided in total, and the different brightness intervals are respectively band0:700-500nit, band1:500-300nit, band2:300-100nit, band3:100-2nit, band4:2-0nit and corresponding to different DBV values, the band division of the technical scheme of the application totally divides the light wave bands according to the brightness interval, and the band corresponding to the fixed brightness value does not exist. And each band corresponds to one PWM dimming strategy, namely 5 PWM dimming strategies; the number of pulses, the duty cycle adjustment range and the adjustment sequence (from 95% to 20%) are consistent in the above 5 dimming strategies, and only the specific values of the duty cycles used are different.

In view of the fact that the number of pulses of the adopted PWM dimming is the same, the adjustment range and the order of the duty ratio are the same, when the gamma value is adjusted, the register of emit corresponding to GOAtiming does not need to be selected again, and only one group is needed.

It should be noted that, dividing into 5 bands is only an example, and the specific number of bands can be set according to the actual requirement.

For better explaining the technical scheme of the application, taking the example that the current brightness adjustment range falls within the interval of 700-500nit, the band to which the brightness adjustment range belongs is band0; then, a picture of 700nit and a DBV value thereof are sent to ddic; and A, the ddic determines a current required PWM dimming strategy according to the received DBV value, and performs dimming according to the dimming duty value set by the internal register.

Since the image data sent from the front end is unchanged in the same band, the total current flowing through the panel is unchanged, and the IR is basically unchanged in the current band (the influence caused by the change of elvss is not considered at the moment), that is, the IR values required in one band are the same, and the IR values are different from band to band.

Optionally, DC dimming is used between the optical bands.

DC dimming is used between bands of light, such as between band1 and band2, to make the brightness conform to an ideal curve.

According to the optimization method provided by the application, gamma calibration times are reduced on the production line, the production time is saved, the production efficiency is improved, the requirement can be met by only one register, and the production cost is reduced. And the application compensates for different bands by adopting different IR values, thus obtaining better display effect.

It is noted that relational terms such as first and second, and the like are 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. Moreover, 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 phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

While the present application has been described in detail through the foregoing description of the preferred embodiment, it should be understood that the foregoing description is not to be considered as limiting the application. Many modifications and substitutions of the present application will become apparent to those of ordinary skill in the art upon reading the foregoing. Accordingly, the scope of the application should be limited only by the attached claims.

Claims

1. A method for optimizing OLED production and display, comprising:

2. The method of claim 1, wherein the number of pulses in each PWM dimming strategy remains consistent.

3. The method of claim 2, wherein the duty cycle adjustment range and sequence remain consistent in each PWM dimming strategy.

4. A method as claimed in claim 3, characterized in that only the duty cycle is different in each PWM dimming strategy.

5. The method of claim 1, further comprising step 5) employing DC dimming between the light bands.

6. The method of claim 1, further comprising step 6) of compensating for the same IR value within the optical band.

7. The method of claim 6, wherein in step 6), compensation is performed with different IR values for different optical bands.