January, 2022-English www.winstar.com.tw
 
E-Newsletter - Winstar Display
 
Issue No. 155
 
Contents
1) Lunar New Year Holiday Notice & Shipping Arrangement
2) Winstar Received 2022 Taiwan Excellence Award
3) WO320240E – Graphic COG LCD Module
4) WO320240F – Graphic COG LCD Module
5) IC Shortage-Winstar offers alternative solutions for optimizing products

 

 

Lunar New Year Holiday Notice & Shipping Arrangement

Welcome to read the 1st released issue of Winstar Newsletter of year 2022. Winstar Display Taiwan HQ, branches and China facilities will be closed from January 29th thru February 6th, 2022 for Lunar New Year Holiday. We will resume working on February 7, 2022.

Below is the last shipping date and the first shipping date for this period as reference. Shipments and deliveries before and after Chinese New Year might be moving unstable since the impact of COVID-19 epidemic and long period holiday. Also, the shipments usually will hit with a huge increase in volumes before this public holiday. Please work with our sales persons closely before holiday if your shipment might be affected. Thank you.

 
Shipping From Taiwan:
►Last shipping date: January 27, 2022
►First shipping date: February 7, 2022
Shipping From China:
►Last shipping date: January 27, 2022
►First shipping date: February 7, 2022

Lunar New Year Holiday is the most important time for Chinese people to bring family together for feasting and celebrating.  Most of the companies in Taiwan and China will have a year-end party traditionally held ahead of the Lunar New Year as a way for companies to show their appreciation to their employees.

On January 21th, Winstar hold an annual year-end party in our headquarters for safety sake instead of in a banquet restaurant since the COVID-19 epidemic is still ongoing worldwide. We had a different party this year; we invited a live show groups to join in our party and we held a raffle draw for many big prizes. We enjoyed a wonderful time to celebrate this party with our work colleagues together.

We would like to share with you the happiness and highlight of this party. Welcome to check the below link and watch the video. We hope the Lunar Year of the Tiger ahead brings you Happiness, Joy & Prosperity. 

Watch Winstar Year-end party Activity Highlight video

 

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Winstar Received 2022 Taiwan Excellence Award

We are proud to announce that Winstar Display Co. received 2022 Taiwan Excellence Award from Taiwan government institution. The Taiwan Excellence is an award that is delivered by the Ministry of Economic Affairs and Taiwan External Trade Development Council (TAITRA) to encourage Taiwan industries to upgrade and incorporate Innovalues into their products. Winstar OLED products received eight times of Taiwan Excellence Awards, that's making us the best PMOLED manufacturer in Taiwan which has won this Award for eight times in a row.

Winstar Moisture Control OLED WEO012864 series rewarded as 2022 Taiwan Excellence product, it is a powerful product featuring all the OLED superior properties, this Moisture Control OLED series has significant superiority over other displays which is adopted our fin technology that can block the penetration of external water vapor to achieve excellent weather resistance and extend product lifetime. Taiwan Excellence is the highest accolade awarded to products that encapsulate Innovalues.

This Award selection is based on four different criteria: R&D, Design, Quality, and Marketing. Winstar Display OLED products are innovative and superior in terms of performance, quality, and design; and our OLED products that have been honored with the year of 2011, 2012, 2014, 2017, 2018, 2019, 2021 and 2022 Taiwan Excellence Award. These Awards are the greatest testimony to our product development, design ability, and business performance of Winstar Display products. We care about details. A good design is a combination of detailing. We believe technology should adapt to people’s needs, not the other way abounds.

 

Winstar Display - 2022 Twaiwan Excellence Award

Link to Taiwan Excellence Awards Winstar Company page

 

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WO320240E – Graphic COG LCD Module

WO320240E is a monochrome graphic LCD module made of 320x240 dot matrix format. This STN COG module is built-in with RA8835 controller IC; it supports 6800 and 8080 parallel interface, 1/240 driving duty, it is also built-in with negative voltage generator. Furthermore, this model is built-in with temperature compensation available for optional.

WO320240E model supports 3.3V and 5V power supply voltage. This module can be operated at temperatures from -20°C to +70°C; its storage temperatures range from -30°C to +80°C. WO320240E is available in FSTN positive LCD and with White LED backlight; please contact us if you need different LCD type and LED combination. Please note WEO320240E is the replacement of WO320240D since the original IC has been EOL.

 
WO320240E Dimension
Number of dots 320x240
Outline dimension 94.7 x 83.3 x 9.4max mm
View area 81.4 x 61.0 mm
Active area 76.785 x 57.11  mm
Dot size 0.223 x 0.225 mm
Dot pitch 0.238 x 0.24 mm
LCD type FSTN Positive Transflective
Duty 1/240
View direction 6 o'clock 
Backlight LED, White
IC RA8835
Interface 6800/8080 series
WO320240E

 

WO320240E

Link to WO320240E web page

 

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WO320240F – Graphic COG LCD Module

WO320240F is a COG graphic LCD module made of resolution 320x240 pixels. WO320240F model is built-in with 2 chips of UCi7701 driver IC and 1 chip of UCi7702 driver IC; it supports 6800 and 8080 parallel interface, 1/240 driving duty, it is also built-in with negative voltage generator. Furthermore, this model is built-in with temperature compensation available for optional.

WO320240F model supports 3.3V and 5V power supply voltage. This module can be operated at temperatures from -20°C to +70°C; its storage temperatures range from -30°C to +80°C. WO320240F is available in white background color and black content; the LCD matrix is a positive FSTN with transflective polarizer. Welcome to contact us if you need different LCD type and LED combination. Please note WEO320240F is the alternative of WO320240G since the original IC has been EOL.

 
WO320240F Dimension
Number of dots 320x240
Outline dimension 94.7 x 83.3 x 9.8max mm
View area 81.4 x 61.0 mm
Active area 76.785 x 57.11 mm
Dot size 0.223 x 0.225 mm
Dot pitch 0.238 x 0.24 mm
LCD type FSTN Positive Transflective
Duty 1/240
View direction 6 o'clock
Backlight LED, White
Driver IC UCi7701*2+UCi7702*1

 

WO320240F

Link to WO320240F web page

 

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IC Shortage-Winstar offers alternative solutions for optimizing products

Since the beginning of the COVID-19 pandemic, most countries in the world have implemented different lockdown policies. The automotive makers lacked confidence in market demand, misjudges the situation, reduced orders or even canceled orders at the beginning of the pandemic. However, the pandemic is fueling the growth of the Stay-at-Home Economy, Remote Working which has made cloud computing solutions demand getting stronger, medical equipment and 5G applications demand raising up.

Furthermore, the worldwide car market recovered faster than expected especially for EV car which caused the automotive chips demand raised up sharply by surprise. Governments of various countries have successively launched relevant economic revitalization programs, the market has seen a V-shaped recovery and increase orders. A confluence of several events brought the industry to the brink of exhausting its manufacturing capacity especially for chips (ICs). The status brings out a big problem was that strong demand for semiconductor chips used in PCs/laptops, cloud datacenters, AI clusters, games, medial and crypto-currency mining was already constraining the industry supply chain. In this unbalanced supply and demand situation, it also impacted the shortage of IC supply to panel makers, causing prices to rise or maintain at high levels, even cause many IC EOL or IC production reduced.

Facing with the situation of ICs EOL or ICs supply unstable, Winstar brings forward many alternative solutions to solve the problem. Without changing the display module and related hardware, with the smallest variable cost, continue to bring high-quality products to the market, and optimize the products, to be more competitive in the market, and offer profitable solutions for our customers.

Take Winstar standard product WO12864D3 solution as an example, the original STN-LCM design used IC ST7565P standard boost circuit, and the 4 times or 5 times voltage design is the most commonly used. When the supply of IC ST7565P is unstable or even IC shortage, customers can choose IC ST7567 as an alternative IC solution to solve the dilemma of material shortage.

Both ST7565P and ST7567 are single-chip dot matrix LCD driver ICs. The COG IC is the most commonly used in graphic module, which can be directly connected to the microprocessor bus 8-bit parallel or storage microprocessor, the serial display data sent in the internal display data RAM and chip generate an LCD drive signal independent of the microprocessor. Each data bit (65x132) of the internal Display Data RAM is 1-to-1correspondence with each pixel (65x132) on the LCD panel, therefore, ST7565P enables displays with a high degree of freedom. The display area can be expanded horizontally by using master/slave function. With various embedded circuit (2~6 times booster) have the advantages of circuit V0 regulator with LCD voltage contrast control, bias selection and R-C adjustment, voltage follower oscillation circuit. A system with the lowest display power consumption can be created for external components of high-performance portable devices.

The ST7567 IC is similar to ST7565P in basic function; it is not less than ST7565P in drive capability; it is relatively simple in terms of peripheral circuits. The differences between these two ICs in terms of hardware and software functions are shown below Table (1) and Table (2).

Table (1) Hardware comparison:

 

Features ST7565P ST7567
Resolution 132x64+1 V V
132x54+1 V V
132x52+1 V X
132x32+1 V V
132x48+1 V V
Interface 6800 8-bit V V
8080 8-bit V V
4-line SPI V V
External components 10 capacitors 2 capacitors
Vdd range 2.4v~3.3v 2.4v~3.3v
Master/Slave mode V X

 

Table (2) Software comparison:

 

Instructions ST7565P ST7567
Display ON/OFF V V
Display start line set V V
Column address set upper bit V V
Column address set lower bit V V
Status read V V
Display data write V V
Display data read V V
ADC select reverse/normal V V
Display reverse/normal V V
Display all point on/off V V
LCD bias set V V
Read-modify-write V V
Read-modify-write end V V
Reset V V
COM output scan direction
Reverse/normal
V V
Power control set V V
V0 voltage regulator internal resistor ratio set V V
Electronic volume set V V
Sleep mode set, normal/sleep V V
Booster ratio set V X
NOP V V
Test V V
Indicator Display Mode V X

 

Here is an example shown as below figure1 (a). The ST7565P IC commonly used 4 times or 5 times boost circuit. Under the condition of total PIN numbers do not change, for keeping the same application peripheral circle, there are some changes in the pin define. In 4 times voltage design, CAP2+/- of ST7565P will be change to V0 and XV0 in ST7567 IC. And V4 (ST7565P) will be change to VG (ST7567 IC). The rest of the not used pins will be all set to NC in ST7567 IC.

Figure 1: IC ST7565P and IC ST7567 peripheral circuit layout comparison

[Figure 1: IC ST7565P and IC ST7567 peripheral circuit layout comparison]

 

The recommend capacitance value is different between two ICs. The capacitance value of the CAP2+/- in ST7565P IC is maximum 2.2μF, as to ST7567 IC, the recommend capacitance value is 0.1μF. However, it does not affect the display image effect. The capacitance value only affects the charging and discharging time. And the effected time is very short, as shown in the figure below.

Figure 2: Different capacitance and discharging time comparison.

[Figure 2: Different capacitance and discharging time comparison.]

 

In the implement on the product application, using a capacitor value of 2.2μF, the discharge speed will be very fast, but it will not cause the phenomenon of image retention when shutting down. If there is a residual image during shutdown, it is recommended to change the capacitor to 0.1μF, or add a resistor to the circuit, and discharge it to improve it. The schematic diagram is shown in Figure 3.

Figure 3: Schematic diagram of the circuit design to improve the afterimage of shutdown

[Figure 3: Schematic diagram of the circuit design to improve the afterimage of shutdown]

 

Considering the voltage booster setting mode of the software, IC ST7567 is compatible with the original setting mode of the original IC ST7565P as below table:

The contrast voltage of display on the LCD, the software settings of the two ICs can also be the same. However, the original designs of these two ICs are still different. Therefore, according to the actual display effect, it still needs to be adjusted to the best display contrast. As shown in the below table.

Take Winstar standard product WO12864H as the example of the solution, as shown in Figure 4. The design of the peripheral circuit using IC ST7567 is relatively simple, only two capacitors are needed (the recommended capacitor value is C1=0.1μF and C2=0.1μF); for the multiple of the boost, you only need to set it when the software is initialized. It can be 4 times or 5 times voltage. With the FPC design and the use of capacitors on the customer's original peripheral circuit, the customers can directly replace it without changing the hardware circuit, which is quite advantageous and simple in design and application.

Figure 4: WO12864H Interface and peripheral circuit design as example

[Figure 4: WO12864H Interface and peripheral circuit design as example]

 

Facing the impact of the epidemic and the rapid changes, Winstar R&D team is always stands with customers to face all challenges together, to be customer’s solution partner, solving problems for customers and moving forward together. Some existing STN models have already been affected by the IC shortages or IC supply unstable, we released alternative models which corresponding IC have shorter lead-time. Please check the below as reference.

 
Existing Model Corresponding IC Alternative Model New IC
WO1602G ST7032(i) WO1602K ST7032A(i)
WO1602H ST7032(i) WO1602L ST7032A(i)
WO1602I ST7032(i) WO1602M ST7032A(i)
WO12864A1 ST7565P WO12864M ST7567
WO12864B1 ST7565P WO12864N ST7567
WO12864C2 ST7565P WO12864P ST7567S
WO12864D3 ST7565P WO12864Q ST7567
WO12864T ST7565P WO12864T1 ST7567S
WO12864U ST7565P WO12864U1 ST7567S

Link to STN Technology web page

 

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